WO2025229132A1

WO2025229132A1 - Handheld uroflowmetry device

Info

Publication number: WO2025229132A1
Application number: PCT/EP2025/061974
Authority: WO
Inventors: Are-Dag Wagtskjold ERIKSEN
Original assignee: Flyt Medical AS
Current assignee: Flyt Medical AS
Priority date: 2024-04-30
Filing date: 2025-04-30
Publication date: 2025-11-06
Anticipated expiration: 2026-10-30
Also published as: GB202406018D0; GB2640652A

Abstract

The present disclosure provides a handheld uroflowmetry device (100). The handheld uroflowmetry device comprises a funnel (102) for receiving a flow of urine from a user and a reservoir (106) connected to the funnel so as to be located below the funnel during use and receive the flow of urine from the funnel. The handheld uroflowmetry device also includes a restricted flow outlet (108) disposed in a lower end (124) of the reservoir, and one or more sensors (120) disposed to measure a parameter indicative of a volume of the urine in at least a part of the reservoir.

Description

HANDHELD UROFLOWMETRY DEVICE

BACKGROUND

[0001] Uroflowmetry (the measurement of urine flow) is a relatively common procedure to detect problems with the bladder, kidneys, etc. Uroflowmetry measures the flow of urine. It tracks how fast urine flows, how much flows out, and how long it takes. Uroflowmetry measurements are mainly carried out by urologists or gynaecologists. The most common method of measuring urine flow is to capture and weigh urine so that differential values can be used to estimate the urine flow rate.

[0002] Such measurements work technically, but there is a consensus that the actual values may not be very accurate due to various factors that may influence the capture of the urine, such as the patient often having to urinate in an uncommon environment, and any stress that this may cause.

SUMMARY

[0003] According the present invention there is provided a handheld uroflowmetry device comprising: a funnel for receiving a flow of urine from a user; a a reservoir connected to the funnel so as to be located below the funnel during use and receive the flow of urine from the funnel, a restricted flow outlet disposed in a lower end of the reservoir, and one or more sensors disposed to measure a parameter indicative of a volume of the urine in at least a part of the reservoir.

[0004] In various examples, the parameter indicative of a volume of the urine in at least a part of the reservoir may comprise one or more of: the volume, and/or the level or height of the fluid in the at least a part of the reservoir, and/or a weight or mass of the fluid, and/or a pressure of the fluid. It will be appreciated that any of these parameters may be measured to determine the volume of urine in the reservoir at one or several points in time, and/or a flow rate of urine entering the reservoir. [0005] In examples, the handheld uroflowmetry device may comprise a measuring device having the reservoir. In examples, the funnel may be removably attachable to an inlet of the measuring device. In examples, the funnel may be push-fit into the inlet of the measuring device. In examples, the measuring device may comprise a substantially rigid body, for example a rigid body. In examples, the funnel may comprise a flexible or conformable material, such as silicone.

[0006] In examples, the measuring device may be tubular, with the inlet formed at a first end and the outlet formed in a second end opposite to the first end.

[0007] In examples, the outlet is an outlet from the handheld uroflowmetry device such that during use urine exits the handheld uroflowmetry device through the outlet. This may allow the handheld uroflowmetry device to be used in a conventional setting for urination (e.g., over a toilet or in a shower), and causes the urine to drain from the handheld uroflowmetry device during use so that it does not need to be emptied after use.

[0008] Advantageously, positioning the outlet at the lower end of the reservoir may generate a constant outflow of urine so long as there is urine in the reservoir. As explained in detail hereinafter, the flow rate of urine through the outlet may be assumed or determined in order to determine the volume and/or flow rate of urine entering the reservoir.

[0009] In examples, the restricted flow outlet may comprise one or more orifices defining a fixed size outlet.

[0010] In examples, the one or more sensors may comprise a plurality of sensors. In examples, the one or more sensors may comprise two, three, four, five, or more sensors. Each of the plurality of sensors may be configured to measure a parameter indicative of the volume of the urine at a different location within the reservoir.

[0011] In examples, each of the one or more sensors may comprise a solid-state sensor.

[0012] In examples, each of the one or more solid-state sensors may comprise a radar sensor. The radar sensor may be operable to detect a surface of urine accumulated in the reservoir, which can be used to determine a level or height of urine in the reservoir. The or each radar sensor may comprise a cover. The cover may be integral with a wall of the reservoir. The cover may be shaped as a lens antenna configured to guide the radar within the reservoir.

[0013] In other examples, each of the one or more solid-state sensors may comprise a capacitive sensor arranged to detect the position of a surface of the urine accumulated in the reservoir. In other examples, each of the one or more solid-state sensors may comprise a lidar sensor arranged to detect the position of a surface of the urine accumulated in the reservoir. In other examples, each of the one or more solid-state sensors may comprise an ultrasonic sensor arranged to detect the position of a surface of the urine accumulated in the reservoir. In other examples, each of the one or more solid-state sensors may comprise a pressure sensor arranged to detect a hydrostatic pressure of the urine in the reservoir, preferably the lower end of the reservoir, in order to determine a volume or level of urine in the reservoir. In other examples, each of the one or more solid-state sensors may comprise a load cell arranged to detect a weight of the urine in the reservoir. The load cell is preferably located at the lower end. The weight of the urine can be used to determine a volume or level of urine in the reservoir. In other examples, each of the one or more solid-state sensors may comprise a strain gauge that may be arranged to detect a pressure of the urine in the reservoir, or a strain of a part of the reservoir caused by the urine accumulated in the reservoir. In other examples, each of the one or more solid-state sensors may comprise or a turbine arranged to measure a flow rate and/or volume of urine entering or leaving the reservoir.

[0014] In examples, the handheld uroflowmetry device may comprise more than one type of sensor, which may be selected from those mentioned above.

[0015] In examples, the handheld uroflowmetry device may comprise a spout extending into the reservoir towards the lower end of the reservoir so as to divide the reservoir into a receiving portion within the spout and a measuring portion. The one or more sensors may be arranged to measure the parameter indicative of the volume of the urine in the measuring portion. In examples, an end of the spout may be spaced from the lower end of the reservoir. In examples, the spout may be tubular and the measuring portion of the reservoir may be an annular volume surrounding the spout. In examples, the one or more sensors may comprise a plurality of sensors circumferentially spaced about the annular volume.

[0016] In examples, the funnel may comprise the spout. The funnel may comprise a cup portion for capturing the urine flow of a user, a spout (e.g., a tubular spout) that extends into the reservoir during use, and a connecting portion for connecting the funnel to the measuring device. The connecting portion may comprise a tapered plug (bung portion) that is push-fit into an opening of the measuring device.

[0017] In examples, the handheld uroflowmetry device of any preceding claim, may comprise a processor configured to receive a measurement signal from the one or more sensors, the measurement signal being indicative of the volume of the urine in at least a part of the reservoir. In examples, in dependence on the measurement signal, the processor may be configured to determine a flow rate of the urine into the reservoir and/or a volume of the urine. [0018] In examples, the handheld uroflowmetry device may comprise circuitry configured to couple with a dock for power and/or data transmission.

[0019] According to the present invention there is also provided a handheld uroflowmetry device comprising: an inlet for receiving a flow of urine from a user, a reservoir arranged to receive the flow of urine, and one or more radar sensors arranged to measure a level of the urine in the reservoir.

[0020] In examples, the handheld uroflowmetry device of any preceding claim, may comprise a processor configured to receive a measurement signal from the one or more sensors, the measurement signal being indicative of the volume of the urine in at least a part of the reservoir. In examples, in dependence on the measurement signal, the processor may be configured to determine a flow rate of the urine into the reservoir and/or a volume of the urine.

[0021] In examples, the handheld uroflowmetry device may comprise circuitry configured to couple with a dock for power and/or data transmission.

[0022] The handheld uroflowmetry device may further comprise an outlet defining a restricted outlet flow of urine from the reservoir. The handheld uroflowmetry device may further comprise a funnel removably couplable to the inlet. The funnel may comprise a spout as described above. The spout may divide the reservoir into a receiving portion and a measuring portion. The one or more radar sensors may comprise a plurality of radar sensors spaced about the measuring portion and arrange to measure a level of urine in different locations in the reservoir, in particular in the measuring portion.

[0023] The or each radar sensor may comprise a cover acting to seal the radar sensor from the reservoir. The cover may be integrated into a wall of the reservoir. In examples, a part of the wall of the reservoir may comprise the cover, or the cover may be integrated (e.g., co-moulded) with the wall. The cover may be shaped as a lens antenna to guide the radar within the reservoir. [0024] According to the present invention there is also provided a uroflowmetry system comprising: the handheld uroflowmetry device described above, the handheld uroflowmetry device comprising circuitry configured to couple with a dock for power and/or data transmission; and a dock comprising second circuitry configured to couple with the circuitry of the handheld uroflowmetry device for power and/or data transmission.

[0025] In examples, the dock may comprise a processor configured to receive a measurement signal from the handheld uroflowmetry device, the measurement signal being indicative of a volume of the urine in at least a part of the reservoir. In examples, in dependence on the measurement signal, the processor may be configured to determine a flow rate of urine into the reservoir and/or a volume of the urine.

[0026] In examples, the dock may comprise a communications module configured to transmit the measurement signal and/or a signal indicative of the flow rate or volume of the urine to an external server. In examples, the external server may be a medical server, for example accessible by a medical professional such as a urologist.

[0027] In examples, the circuitry and the second circuitry may each comprise terminals for forming a wired connection between the handheld uroflowmetry device and the dock. Additionally or alternatively, the circuitry and the second circuitry may comprise a wireless communications module and/or a wireless power module for wireless power and/or data transmission.

[0028] As mentioned above, in examples the handheld uroflowmetry device may comprise a measuring device having the reservoir, and a funnel that is removably attachable to an inlet of the measuring device. In such examples the measuring device may comprise the one or more terminals and/or wireless communication/power modules. The measuring device may additionally comprise one or more clip features, or be shaped, to physically couple to the dock.

[0029] In examples, the dock comprises a recess shaped to receive the measuring device. The recess may be shaped so as to only accept the measuring device without the funnel attached thereto.

[0030] The system may comprise a plurality of funnels, for example with different shapes and/or sizes for different users. [0031] In examples, the handheld uroflowmetry device comprises a battery, in particular a rechargeable battery. In such examples the dock may comprise a battery charger for recharging the battery when the handheld uroflowmetry device is connected to the dock.

[0032] In examples, the dock may comprise an indicator, such as one or more LEDs or a display screen, for providing status information and/or measured or determined data to the user. [0033] In various example, the processor (in the handheld uroflowmetry device, and/or in the dock, and/or on an external device) may be further confirmed to analyse the measurement signal, and/or a determined urine volume, and/or a determined urine flow rate to determine diagnostic data indicative of one or more pathologies.

[0034] According to another aspect of the present disclosure there is also provided a dock for coupling to the handheld uroflowmetry device. The dock comprises circuitry for coupling with the handheld uroflowmetry device for power and/or data transmission.

[0035] According to the present invention there is also provided a funnel for a handheld uroflowmetry device, the funnel being removably connectable with the handheld uroflowmetry device and comprising: a cup portion for capturing a flow of urine from a user, a spout extending from the cup portion and configured to extend into a reservoir of the handheld uroflowmetry device when the funnel is connected to the handheld uroflowmetry device, and a connecting portion configured to removably connect the funnel to the handheld uroflowmetry device.

[0036] According to the present invention there is also provided a uroflowmetry method comprising: providing the handheld uroflowmetry device described above; collecting urine in the reservoir of the handheld uroflowmetry device; measuring a parameter indicative of the volume of the urine in at least a part of the reservoir using the one or more sensors; and analysing the measurements from the one or more sensors to determine the rate of flow of urine into the handheld uroflowmetry device and/or a volume of the urine.

[0037] According to the present invention there is also provided a method of diagnosing a pathology of a patient comprising the steps of: determining a rate of flow of urine and/or a volume of urine, including the steps of; providing the handheld uroflowmetry device described above; accumulating urine from the patient in the reservoir of the handheld uroflowmetry device; measuring a parameter indicative of a volume of the urine in at least a part of the reservoir using the one or more sensors of the handheld uroflowmetry device; and analysing the measurements from the one or more sensors to determine the rate of flow of urine into the handheld uroflowmetry device and/or a volume of urine entering the handheld uroflowmetry device; and determining the pathology of the patient based on the determined rate of flow of urine into the handheld uroflowmetry device and/or a volume of urine entering the handheld uroflowmetry device.

[0038] In examples, the step of determining the pathology involves analysing the rate of flow of urine into the handheld uroflowmetry device and/or a volume of urine entering the handheld uroflowmetry device as a function of time to determine a flow profile; and comparing the flow profile to known flow profiles indicative of one or more pathologies to determine the pathology of the patient. In examples, the method comprises analysing multiple distinct urine collection events from a single user to determine the flow profile for the user.

BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Embodiments of the invention are described, by way of example only, with reference to the accompanying Figures, in which:

[0040] FIG. 1 illustrates an example handheld uroflowmetry device according to an aspect of the present invention.

[0041] FIG. 2 illustrates a cross-section through the handheld uroflowmetry device of FIG. 1. [0042] FIG. 3 illustrates a cross-section through the handheld uroflowmetry device of FIG. 1 during use.

[0043] FIG. 4 illustrates the handheld uroflowmetry device of FIG. 1 and a dock.

[0044] FIG. 5 illustrates a further example handheld uroflowmetry device according to an aspect of the present invention.

[0045] FIG. 6 illustrates a uroflowmetry method using the handheld uroflowmetry device.

DETAILED DESCRIPTION

[0046] FIG. 1 shows a handheld uroflowmetry device 100 that measures a rate of flow of urine into the handheld uroflowmetry device 100 and/or a volume of urine that flows into the handheld uroflowmetry device 100.

[0047] The handheld uroflowmetry device 100 comprises a funnel 102 for receiving a flow of urine from a user. The funnel 102 comprises a cup portion 110 configured to interface with the anatomy of a user or be positionable such a user can direct a flow of urine into the cup portion 110. In this example the cup portion 110 is defined by an irregular conical shape. As shown in FIG. 1, a width of the cup portion 110 is less than a height of the cup portion 110. This configuration may beneficially allow the cup portion 110 to fit between the legs of a user during use. In this example, the cup portion 110 is configured to interface with the anatomy of a female user. In other examples, the cup portion 110 may instead be configured for interfacing with a different category of user, such as male users. In some examples, the cup portion 110 may have a different size, such as a smaller size for use by a child user.

[0048] The handheld uroflowmetry device 100 further comprises a measuring device 104. The funnel 102 is removably coupled to the measuring device 104. In this example, the funnel 102 is configured to push-fit into an inlet 116 of the measuring device 104. In other examples, the funnel 102 may be a press-fit in the inlet 116, or the funnel 102 may screw or otherwise attach to the measuring device 104, in particular at the inlet 116.

[0049] Providing a measuring device 104 which is separable from the funnel 102 may improve the versatility of the handheld uroflowmetry device 100, enabling the same measuring device 104 to be adapted for various users by coupling a suitable funnel 102 thereto.

Additionally, providing a measuring device 104 which is separable from the funnel 102 may allow for easier cleaning of the handheld uroflowmetry device 100. Additionally, providing a removable funnel may improve the hygiene of the device, or the perception of the hygiene of the device. For example, the funnel 102 may be single-use or may be cleaned separately, giving the user confidence that it is hygienic during use. This may advantageously remove some reasons why users may be reluctant to use a handheld uroflowmetry device 100.

[0050] As shown, the measuring device 104 has a reservoir 106, in particular an internal reservoir, for collecting urine from the funnel 102. The measuring device 104 has a tubular body with a first end 144 at which the inlet 116 is defined, and a second end 146 opposite to the first end 144. An outlet 108 is provided in the second end 146. The outlet 108 opens external to the handheld uroflowmetry device 100 so that urine accumulated in the reservoir 106 flows out through the outlet 108 to exit the handheld uroflowmetry device 100.

[0051] Some conventional uroflowmetry devices require a user to manually empty the device of urine by tilting the device to pour urine out of the device after each collection event. Such devices present numerous drawbacks. For example, emptying a uroflowmetry device manually introduces a risk of spilling urine. Additionally, in order to accommodate the maximum volume of fluid that may be collected in a single collection event, such uroflowmetry devices are often large and difficult manoeuvre.

[0052] In contrast, the handheld uroflowmetry device 100 allows for a continual stream of urine through the handheld uroflowmetry device 100 (i.e., in use, urine is continuously exits the handheld uroflowmetry device 100 through outlet 108). As such, the handheld uroflowmetry device 100 does not need to be manually emptied by a user, and can be more compact and easier to manoeuvre. In addition, the use of the handheld uroflowmetry device 100 is similar to normal urination in that the user positions themselves over a toilet or in the shower until the urine flow stops, needing only to additionally hold the handheld uroflowmetry device 100 in place and wait for the reservoir 106 to drain.

[0053] The outlet 108 is a restricted flow outlet and acts to limit the flow of urine through the outlet 108 during use. The outlet 108 has a fixed area that is significantly smaller than the area of the inlet 116 through which fluid may enter the reservoir 106. In this way, the outlet 108 acts as a flow restrictor. The outlet 108 may comprise a single orifice in the lower end 124 of the reservoir 106, or it may contain a plurality of orifices. The or each orifice may be circular or other shape. In one example the outlet 108 comprises arc-shaped orifices arranged in the lower end 124 of the reservoir 106. [0054] As the outlet 108 is disposed in the lower end 124 of the reservoir 106, urine exits through a whole of the fixed outlet area regardless of the height 114 of urine in the reservoir 106.

[0055] The outlet 108 may be sized such that the outlet flow rate is significantly less than a typical urination flow rate. A normal urine flow rate is between about lOml/s to about 21 ml/s. The outlet 108 may be sized and/or shaped to provide an outlet flow rate of less than about lOml/s, for example between 2 ml/s and lOml/s, for example between 5 ml/s and 8ml/s. As such, the flow of urine into the reservoir 106 will be greater than the flow of urine out of the reservoir 106 during use so that urine accumulates in the reservoir 106.

[0056] It will be appreciated that the handheld uroflowmetry device 100 is designed to be used in a substantially upright position, as illustrated, such that urine enters into the funnel 102 and flows down, under gravity, into the reservoir 106 and out through the outlet 108. Accordingly, the first end 144 may be termed an upper end, and the second end 146 may be termed a lower end. However, the handheld uroflowmetry device 100 may in practice be used at an incline and may not be held still during use.

[0057] The accumulation of the urine in the reservoir 106, created by the restricted flow outlet of the outlet 108, will be indicative of the flow of urine into the handheld uroflowmetry device 100 and/or a volume of urine in the handheld uroflowmetry device 100. For example, a higher input flow rate will generate a higher (and more quickly rising) amount of urine accumulating in the reservoir 106. As explained further hereinafter, one or more sensors are provided to measure a parameter indicative of the volume of urine in at least a part of the reservoir 106. From the measured parameter a processor can determine the flow rate of the flow of urine entering the handheld uroflowmetry device 100 via the funnel 102 and/or a volume of the urine that entered the handheld uroflowmetry device 100 via the funnel 102.

[0058] As shown in FIG. 2, the funnel 102 may comprise a spout 118 that extends from the cup portion 110 into the reservoir 106. In this example, the spout 118 is a tube which is fluidically connected to the cup portion 110. In preferred examples the spout 118 and cup portion 110 are the same component and therefore integral (e.g., moulded together). Urine received in the cup portion 110 is directed into the reservoir 106 via the spout 118.

[0059] As illustrated, the funnel 102 includes a bung portion 132 for removably coupling the funnel 102 to the inlet 116 of the measuring device 104. The bung portion 132 is tapered and can be push-fit into the inlet 116. A push-fit connection may allow a user to easily and quickly detach the funnel 102 from the measuring device 104. Advantageously, the funnel 102 with the bung portion 132 that push-fits into the inlet 116 may be easier to clean than alternative fastening means such as threaded parts, clips or latches. However, it will be appreciated that various other removable coupling means may be utilised in place of the bung portion 132 such as threaded connectors, clips, latches and/or other fastening means. In some examples, the bung portion 132 may be omitted and an exterior surface 134 of the spout 118 may reversibly couple with the inlet 116. In such examples, the exterior surface 134 of the spout 118 and/or the inlet 116 may taper to enable a push-fit connection therebetween. In some examples, the bung portion 132 is formed at a transition between the spout 118 and the cup portion 110.

[0060] As shown in FIG. 2, the spout 118 extends into the reservoir 106 towards a lower end 124 of the reservoir 106. The spout 118 divides the reservoir 106 into a receiving portion 126 within the spout 118 and a measuring portion 128. In this example, the measuring portion of the reservoir 106 is an annular volume surrounding the spout 118. The receiving portion 126 is fluidically coupled to the measuring portion 128 such that in use urine may flow from the receiving portion 126 to the measuring portion 128. In this example, the terminal end 130 of the spout 118 is spaced from the lower end 124 of the reservoir 106 to allow urine to flow between the receiving portion 126 and the measuring portion 128. In some examples, the spout 118 may comprise one or more apertures (not shown) to fluidically couple the receiving portion 126 and the measuring portion 128. In one example the terminal end 130 of the spout 118 may abut the lower end 124 of the reservoir 106 and seal the receiving portion 126 from the outlet 108. In such examples, fluid can only flow from the receiving portion 126 into the measuring portion 128 via apertures in the spout 118, and then exit the measuring portion 128 via the outlet 108. In all examples, the outlet 108 is in direct fluid communication with at least the measuring portion 128, and optionally additionally the receiving portion 126 as illustrated.

[0061] In the illustrated example, urine entering the receiving portion 126 will accumulate in the receiving portion 126, some will flow into the measuring portion 128, and some will flow out of the handheld uroflowmetry device 100 through the outlet 108.

[0062] As illustrated, the measuring device 104 comprises one or more sensors 120 for measuring a parameter indicative of the volume of the urine in at least a part of the reservoir 106. As explained further below, the sensors 120 may measure a level and/or a pressure and/or weight of the urine in at least a part of the reservoir 106. The measuring device 104 further comprises a battery (not shown), for example a rechargeable battery, for powering the one or more sensors 120. The measuring device 104 may comprise a processor and memory for controlling the one or more sensors 120 and recording data obtained by the one or more sensors 120.

[0063] In the illustrated example the one or more sensors 120 are arranged to measure the level (height) of the urine in the measuring portion 128 of the reservoir 106. As shown, the sensors 120 are spaced around an internal perimeter of the reservoir 106. In this example, the measuring device 104 comprises three sensors 120 which are evenly spaced around the internal perimeter of the reservoir 106. Only two of the three sensors 120 can be seen in FIG. 2. In other examples, the measuring device 104 may comprise two, four, five or more sensors 120. The sensors 120 are located in or on a wall 122 of the measuring device 104 that defines the reservoir 106. In this way, the sensors 120 are arranged to measure the level of urine in the measuring portion 128 of the reservoir 106. The sensors 120 may detect the level of the urine in the measuring portion 128 at a plurality of times during use of the handheld uroflowmetry device 100.

[0064] In the illustrated example the sensors 120 are radar sensors arranged to emit and detect radar signals to detect a surface of the urine accumulated in the measuring portion 128 of the reservoir 106. The radar sensors are located towards the first end 144 (upper end) of the measuring device 104, proximate to the inlet 116, so as to be located above the urine during use. The position of the radar sensors also means that the spout 118 shields the radar sensors against urine entering the reservoir 106, which might otherwise splash on the radar sensors and could create false readings.

[0065] Providing more than one sensor 120 may beneficially allow the handheld uroflowmetry device 100 to account for the effects of tilt on the recorded measurements, which may be caused by the handheld uroflowmetry device 100 not being held exactly vertical during use, or by being moved during use. For example, the recorded measurements from each sensor 120 may be averaged to calculate a tilt-independent parameter indicative of the volume of urine. Accordingly, the handheld uroflowmetry device 100 does not have to be held exactly upright during use, improving its usability. In some examples, the measuring device 104 may comprise an additional sensor (not shown) for measuring a tilt of the handheld uroflowmetry device 100 relative to the vertical. For example, the device may be configured to measure the yaw and/or roll and/or pitch of the device over time as the device is used. The measured tilt of the handheld uroflowmetry device 100 and the measurements from the one or more sensors 120 may be used to calculate a tilt-independent parameter indicative of the volume of urine.

[0066] In other examples the sensors 120 may be solid-state sensors. As mentioned above, in this example each of the sensors 120 is a radar sensor for detecting a surface of the urine accumulated in the measuring portion 128 in order to determine a level of urine. Each of the radar sensors may comprise a radar element for emitting and detecting radar waves. The radar element may be formed as an integrated circuit. In examples, each radar sensor also has a cover that seals the radar sensor from the reservoir 106 and thereby protects it from the urine and any cleaning liquids and agents used. In preferred examples the radar sensor is integrated into the wall 122 of the measuring device 104. Radar waves can penetrate polymers, so preferably at least the wall 122 of the measuring device 104 is made from polymer. In this way, the radar sensor can be held in a fixed position and protected against liquid contact.

[0067] In some examples, the cover of the radar sensor or a part of the wall 122 behind which the radar sensor is positioned may be shaped as a lens antenna. The lens antenna (may be termed dielectric lens), may act to focus or diverge radar to form an appropriate field of view within the measuring portion 128.

[0068] In examples, the radar sensors may be mounted on a PCB having a small size, for example less than about 30mm². An example radar sensor is the commercially available Acconeer^- PULSED COHERENT RADAR SENSOR A121. Beneficially, radar sensors may allow for the urine level to be measured with millimetre accuracy at a high sampling rate (e.g. 0.1s) while requiring minimal power expenditure, allowing the battery size and/or time between charges to be increased. They are also low weight, allowing the overall weight of the handheld uroflowmetry device 100 to be limited.

[0069] In other examples, the sensors 120 may be other types of sensors, including other solid-state sensors. For example, the sensors 120 may be capacitive sensors 120 operable to detect the presence of fluid proximal to or contacting the capacitive element. One or more capacitive elements may be provided on or in the wall 122 of the reservoir 106 in order to detect the level of urine in the reservoir 106, in particular in the measuring portion 128. Where multiple capacitive sensors are used, the capacitive sensors may be located at various heights within the reservoir 106 and/or spaced circumferentially about the wall 122 of the reservoir 106. As the positions of the capacitive sensors are known, by comparing the measurements from the capacitive sensors, the level of the urine in the reservoir 106 may be deduced. In some examples, the reservoir 106 may comprise one or more elongate capacitive elements oriented substantially vertically. The proportion of the capacitive element that is covered by urine, and therefore the height of the urine in the reservoir 106, may be calculated from the capacitance measurements. In some examples, multiple different types of sensors may be used in combination. For example, the measuring device 104 may comprise one or more radar sensors and one or more capacitive sensors.

[0070] In these examples the spout 118 advantageously shields the capacitive sensors from the flow of urine entering the reservoir, improving the reliability of the measured parameter.

[0071] FIG. 3 illustrates fluid flowing through the handheld uroflowmetry device 100 during use. In use, the handheld uroflowmetry device 100 is held by a user. In some examples, the handheld uroflowmetry device 100, in particular the measuring device 104, may comprise a grip 138 for a user to grasp. In this example the grip 138 is located on an outer surface of the measuring device 104. At least the reservoir 106 of the measuring device 104 is substantially rigid to prevent a user grasping the measuring device 104 from deforming the reservoir 106. In contrast, the funnel 102 may comprise a flexible material such as silicone for ease of use.

[0072] In use, an input urine flow 148 enters the handheld uroflowmetry device 100 through the cup portion 110 of the funnel 102 and an output urine flow 150 exits the handheld uroflowmetry device 100 through the outlet 108. Due to the restricted outlet 108 urine accumulates in the receiving portion 126 of the spout 118 and, as indicated by dashed lines 140 flows into, and accumulates in, the measuring portion 128 defined around the spout 118. The urine enters the measuring portion 128 by flowing around the terminal end 130 of the spout 118. In this way, the spout 118 defines a U-shaped bend for the urine.

[0073] The spout 118 acts to prevent incoming urine from splashing onto the sensors 120 and causing false readings. As such, the provision of the spout 118 may increase the reliability of the handheld uroflowmetry device 100.

[0074] As the input urine flow 148 flows into the handheld uroflowmetry device 100 urine will exit the handheld uroflowmetry device 100 via the outlet 108 and the level of urine in the measuring portion 128 will increase and may then reach a steady state. Once the input urine flow 148 slows and then stops, urine will continue to drain from the reservoir 106 through the outlet 108, during which time the level of urine in the measuring portion 128 falls to approximately zero. [0075] As explained above, the sensors 120 are arranged to measure a parameter indicative of the volume of urine in at least a part of the reservoir 106, in particular in the measuring portion 128. In the illustrated example the radar sensors detect the position of the surface 142 of the urine in the measuring portion 128, which is indicative of the volume of urine in the measuring portion 128. In particular, the radar sensor may detect the level (height) of urine in the measuring portion 128. As explained above, outlet 108 provides a restricted flow outlet and a restricted output urine flow 150, which can either be approximated or calculated. The sensors 120 are configured to measure the parameter indicative of the volume of urine a plurality of times during any single use, at a sampling rate. The sampling rate may be in the range of milliseconds so that the sensors 120. In this way, the handheld uroflowmetry device 100 is configured to monitor the changes in the parameter during use and not just take just a single measurement at the end of use.

[0076] In some examples, the flow rate of the output urine flow 150 may be approximated based on the size of the outlet 108 and by assuming that the pressure of the urine in the reservoir 106 will be constant due to the relatively small height of the reservoir 106 (and thus the relatively small variations in pressure). In this example it may be assumed that the flow rate of the output urine flow 150 is independent of the flow rate of the input urine flow 148. The assumed flow rate of the output urine flow 150 may be determined by testing and/or calibration.

[0077] Alternatively, the flow rate of the output urine flow 150 may be calculated based on the detected height of the urine in the reservoir 106 and the size of the outlet 108 (and/or test/calibration data). The flow rate of the output urine flow 150 for different levels of urine in the reservoir 106 may be determined by testing and/or calibrating and stored in a memory of the handheld uroflowmetry device 100 and used as a reference (look-up table), or it may be calculated by knowing the level of the urine in the reservoir 106 (and hence the pressure) and the size and shape of the outlet 108.

[0078] The flow rate of the input urine flow 148 may therefore be determined from the detected level of urine in the measuring portion 128, and the assumed or calculated flow rate of the output urine flow 150. The flow rate of the input urine flow 148 may be recorded over time during use to determine a volume of urine entering the reservoir 106. In other examples, testing and/or calibration data may provide a look-up table for retrieving estimated urine volume based on the measurement signal received from the sensors 120, and a time during which urine is present in the measuring portion 128.

[0079] The handheld uroflowmetry device 100, in particular the measuring device 104, may comprise a processor and a memory (not shown). The processor and memory may be collectively configured to receive the measurement signals generated by the sensors 120 and to determine the flow rate of the input urine flow 148 and the corresponding time during use, and/or to determine the volume of urine that entered handheld uroflowmetry device 100 during use. The determined flow rate and/or urine volume may be stored in the memory.

[0080] FIG. 4 shows a uroflowmetry system 200 according to an aspect of the invention. In this example, the uroflowmetry system 200 comprises the handheld uroflowmetry device 100 and a dock 202 for coupling to the measuring device 104. In some examples, the dock 202 may comprise a power source, for example a battery, and in particular a rechargeable battery (not shown). The dock 202 may be operable to connect to an external power source such as a mains power supply (e.g., via a charging port) for powering the dock 202 and/or charging the battery.

[0081] The dock 202 may be operable to electrically couple to the measuring device 104 to recharge the battery of the measuring device 104. In some examples, the dock 202 may additionally or alternatively be operable to electrically couple to the measuring device 104 for data transmission between the measuring device 104 and the dock 202.

[0082] In this example, the measuring device 104 comprises first circuitry (not shown) configured to couple with the dock 202 for power and/or data transmission. As explained above, the measuring device 104 may comprise a processor and memory configured to determine a flow rate and/or urine volume, which may be stored in the memory. The processor and memory may be connected with the first circuitry in the measuring device 104.

[0083] The dock 202 comprises second circuitry for coupling with the first circuitry of the measuring device 104 for power and/or data transmission. The second circuitry and the first circuitry may comprise terminals that connect to each other when the measuring device 104 is placed on/in the dock 202. The terminals may provide connections for power and/or data transmission. In other examples, the first circuitry and the second circuitry may comprise wireless communication modules, for example Bluetooth(R) modules, for wirelessly coupling for data transmission.

[0084] In some examples the dock 202 may comprise a processor and a memory collectively configured to receive the measurement signal data and/or flow rate and/or urine volume from the measuring device 104. In some examples, the memory of the measuring device 104 stores the measurement signal data, which is transmitted to the dock 202, the processor of the dock 202 receives the measurement signal data and determines the flow rate and/or the urine volume. For example, the memory of the measuring device 104 may store measurement signal data indicative of the level of the urine in the reservoir 106 sampled during a collection event. In some examples, the memory of the measuring device 104 may be operable to store data for multiple collection events at one time. When the measuring device 104 is electrically coupled to the dock 202, the first circuitry may transmit the measurement signal data from the measuring device 104 to the dock 202. On the basis of the measurement signal data received from the measuring device 104, the processor of the dock 202 may determine the flow rate of the input urine flow 148 (see FIG. 3) and/or the volume of urine that entered the reservoir 106 during use, for each of the collection events recorded.

[0085] As shown in FIG. 4, the dock 202 may be shaped to receive at least part of the measuring device 104. In particular, the dock 202 may comprise a recess 204 in which the measuring device 104 is positionable. The measuring device 104 may be configured to physically couple to the dock 202 by a coupling mechanism. In the illustrated example, the recess 204 is configured to receive at least part of the handheld uroflowmetry device 100, in particular the measuring device 104. The measuring device 104 comprises a connector 152 in the form of a flattened protuberance which projects away from the tubular body of the measuring device 104. Beneficially, the provision of the connector 152 may prevent the tubular body of the measuring device 104 from rolling when placed on a surface, which could otherwise result in damage to the measuring device 104 (e.g., if it rolled off the side and fell into the basin of a sink). In other examples, the connector 152 may be omitted. The measuring device 104 may have a non-circular cross-section.

[0086] The connector 152, is configured to mate with the recess 204 of the dock 202 to physically couple the measuring device 104 to the dock 202. In other examples, the dock 202 may comprise one or more protuberances configured to mate with a corresponding one or more recesses of the measuring device 104. In some examples, the measuring device 104 may be configured to physically couple to the dock 202 by one or more mechanical fasteners such as clips. In some examples, the measuring device 104 may be configured to physically couple to the dock 202 by a magnetic latch system. The measuring device 104 may be configured to couple to the dock 202 in a single or a limited number of configurations as defined by the coupling mechanism. Such configurations may be selected to ensure electrical coupling between the measuring device 104 and the dock 202.

[0087] As shown, the dock 202 may include a liquid recess 206 arranged to collect any remnant fluid remaining in the handheld uroflowmetry device 100 when it is connected to the dock 202, for example water or cleaning fluid.

[0088] The first circuitry of the measuring device 104 may be configured to electrically couple to the second circuitry of the dock 202 when the measuring device 104 is physically coupled to the dock 202. For example, the measuring device 104 may comprise a first set of terminals for data and/or power transfer. Similarly, the dock 202 may comprise a second set of terminals for data and/or power transfer. The first set of terminals may be configured to electrically couple to the second set of terminals when the measuring device 104 is physically coupled (docked) to the dock 202. In some examples, the measuring device 104 may be configured to wirelessly couple to the dock 202 for data and/or power transfer when the handheld uroflowmetry device 100 is physically coupled (docked) to the dock 202. Such a wireless connection may enable easier cleaning of the dock 202 and the measuring device 104. For example, the dock 202 and/or the measuring device 104 may each be individually encapsulated (e.g. in plastic) such that they are waterproof.

[0089] The funnel 102 may be disconnected from the measuring device 104 before the measuring device 104 is coupled to the dock 202. In particular, the recess 204 may be shaped such that the measuring device 104 can only be coupled to the dock 202 after removal of the funnel 102. In some examples, the dock 202 may be configured such that the funnel 102 may be connected to the measuring device 104 when the measuring device 104 is connected to the dock 202.

[0090] Typically, following use of handheld uroflowmetry device 100 the funnel 102 is removed so that the funnel 102 and the measuring device 104 can be cleaned separately. The measuring device 104 may then be coupled to the dock 202 for data and/or power transfer. As such, the dock 202 may act as a station where the measuring device 104 is stored in between uses. While the measuring device 104 is coupled to the dock 202, the dock 202 can recharge the battery of the measuring device 104 and download data from the memory of the measuring device, for example data of the measurement signals received during use.

[0091] In some examples, the dock 202 comprises a communications module (not shown) for communicating with an external server (e.g., over a mobile telecommunications network or local internet connection). The communications module is preferably operable for wireless communication.

[0092] In one example the dock 202 comprises Wi-Fi module for communicating with an external server. In another example, the dock 202 comprises a Bluetooth module for connecting with a mobile device application and transferring data to the mobile device. The mobile device may then transmit that data to the external server. The mobile device application may additionally or alternatively be used to configure the dock 202 to connect to Wi-Fi _ 33.

[0093] In these ways, the communications module may be configured to transmit uroflowmetry data to the external server. In examples, the uroflowmetry data may include measurement signal data generated by the sensors, and/or the flow rate of the input urine flow 148 (see FIG. 3), and/or the volume of urine entering the handheld uroflowmetry device 100. In some examples, the communications module is configured to transmit the measurement signal data generated by the sensors to the external server, and the external server is configured to determine the flow rate of the input urine flow 148 (see FIG. 3), and/or the volume of urine entering the handheld uroflowmetry device 100 based on the measurement signal data.

[0094] In a preferred example, the external server may be accessible by a medical practitioner such as a doctor. For example, the external server may be a medical data server and may be linked to a medical record of the user and accessible to a medical practitioner.

[0095] FIG. 5 shows a further example handheld uroflowmetry device 500. FIG. 5 illustrates a measuring device 502 of the handheld uroflowmetry device 500, and it will be appreciated that a funnel may be connectable to the measuring device 502 in the same manner as described above. In this example the measuring device 502 comprises an inlet 510 through which urine can enter a reservoir 504 defined in the measuring device 502. In contrast to the examples described above, in this example the measuring device 502 does not comprise an outlet. In particular, urine entering the reservoir 504 is captured in the reservoir 504 and can be emptied by a user after use of the handheld uroflowmetry device 500. In this example the funnel may comprise a spout, as described above, that divides the reservoir 504 into a receiving portion and a measuring portion. Alternatively, the funnel may not extend into the reservoir 504 and urine collects evenly in the reservoir 504.

[0096] As illustrated, one or more radar sensors 508 are integrated into the wall 506 of the measuring device 502 and are arranged to measure a level (height) of urine in the reservoir 504. In this example, two radar sensors 508 are integrated into the wall 506 and arranged to measure the level of the urine in the reservoir 504. More than two radar sensors 508 may be provided, for example three or four. The radar sensors 508 may be as described above, and the wall 506 in the region of the radar sensors 508 may include, or be shaped as, a lens antenna to focus the radar sensors 508 on particular areas of the reservoir 504.

[0097] Other features of the measuring device 104 described above may be provided on the measuring device 502 to provide the same functionality. In particular, the measuring device 104 may comprise first circuitry, a processor, a memory, and/or a communications module as described above. The measuring device 502 may be couplable with the dock 202 described above.

[0098] FIG. 6 shows a uroflowmetry method 600 carried out using the handheld uroflowmetry device 100, 500 described above.

[0099] Step 602 of the uroflowmetry method 600 comprises providing the handheld uroflowmetry device 100, 500 described above. Step 602 may comprise providing the handheld uroflowmetry device 100, 500 to a user with a funnel 102 that is suitable for the user, for example based on their anatomy and/or age.

[0100] Step 604 comprises collecting urine in the reservoir 106, 504 of the handheld uroflowmetry device 100, 500.

[0101] Step 606 comprises measuring a parameter indicative of the volume of the urine in at least a part of the reservoir 106, 504 using the one or more sensors 120, 508.

[0102] Step 608 comprises analysing the measurements from the one or more sensors 120, 508 to determine the rate of flow of urine into the handheld uroflowmetry device 100, 500 and/or a volume of the urine.

[0103] As explained above, step 608 may be performed by a processor in the handheld uroflowmetry device 100, 500, by a processor in the dock 202, and/or by a processor of an external server. The uroflowmetry method 600 may further comprise transfer of data between the handheld uroflowmetry device 100, 500, the dock 202, and the external server.

[0104] In examples, the method may further comprise diagnosing a pathology using the rate of flow of urine into the handheld uroflowmetry device 100, 500 and/or a volume of the urine.

[0105] It will be appreciated that various changes and modifications can be made to the present invention without departing from the scope of the present application.

Claims

1. A handheld uroflowmetry device comprising: a funnel for receiving a flow of urine from a user; a a reservoir connected to the funnel so as to be located below the funnel during use and receive the flow of urine from the funnel, a restricted flow outlet disposed in a lower end of the reservoir, and one or more sensors disposed to measure a parameter indicative of a volume of the urine in at least a part of the reservoir.

2. The handheld uroflowmetry device of claim 1, comprising a measuring device having the reservoir, and wherein the funnel is removably attachable to an inlet of the measuring device.

3. The handheld uroflowmetry device of to claim 2, wherein the funnel is push-fit into the inlet of the measuring device.

4. The handheld uroflowmetry device of claim 2 or 3, wherein the measuring device is tubular, with the inlet formed at a first end and the outlet formed in a second end opposite to the first end.

5. The handheld uroflowmetry device of any preceding claim, wherein the restricted flow outlet comprises one or more orifices defining a fixed size outlet.

6. The handheld uroflowmetry device of any preceding claim, wherein the one or more sensors comprises a plurality of sensors, each of the plurality of sensors configured to measure a parameter indicative of the volume of the urine at a different location within the reservoir.

7. The handheld uroflowmetry device of any preceding claim, wherein each of the one or more sensors comprises a solid-state sensor.

8. The handheld uroflowmetry device of claim 7, wherein each of the one or more solid-state sensors comprises a radar sensor.

9. The handheld uroflowmetry device of claim 8, wherein the or each radar sensor comprises a cover.

10. The handheld uroflowmetry device of claim 9, wherein the cover is integral with a wall of the reservoir.

11. The handheld uroflowmetry device of claim 9 or 10, wherein the cover is shaped as a lens antenna configured to guide the radar within the reservoir.

12. The handheld uroflowmetry device of claim 7, wherein each of the one or more solid-state sensors comprise one or more of: a capacitive sensor, a lidar sensor, an ultrasonic sensor, a pressure sensor, a load cell, a strain gauge or a turbine.

13. The handheld uroflowmetry device of any preceding claim, comprising a spout extending into the reservoir towards the lower end of the reservoir so as to divide the reservoir into a receiving portion within the spout and a measuring portion, and wherein the one or more sensors are arranged to measure the parameter indicative of the volume of the urine in the measuring portion.

14. The handheld uroflowmetry device of claim 13, wherein an end of the spout is spaced from the lower end of the reservoir.

15. The handheld uroflowmetry device of claim 13 or 14, wherein the spout is tubular and the measuring portion of the reservoir is an annular volume surrounding the spout.

16. The handheld uroflowmetry device of claim 15, wherein the one or more sensors comprises a plurality of sensors circumferentially spaced about the annular volume.

17. The handheld uroflowmetry device of any one of claims 13 to 16, wherein the funnel comprises the spout.

18. A handheld uroflowmetry device comprising: an inlet for receiving a flow of urine from a user, a reservoir arranged to receive the flow of urine, and one or more radar sensors arranged to measure a level of the urine in the reservoir.

19. The handheld uroflowmetry device of any preceding claim, comprising a processor configured to receive a measurement signal from the one or more sensors, the measurement signal being indicative of the volume of the urine in at least a part of the reservoir, and wherein, in dependence on the measurement signal, the processor is configured to determine a flow rate of the urine into the reservoir and/or a volume of the urine.

20. The handheld uroflowmetry device of any preceding claim, comprising circuitry configured to couple with a dock for power and/or data transmission.

21. A uroflowmetry system comprising: the handheld uroflowmetry device of claim 20; and a dock comprising second circuitry configured to couple with the circuitry of the handheld uroflowmetry device for power and/or data transmission.

22. The uroflowmetry system of claim 21, wherein the dock comprises a processor configured to receive a measurement signal from the handheld uroflowmetry device, the measurement signal being indicative of a volume of the urine in at least a part of the reservoir, and wherein, in dependence on the measurement signal, the processor is configured to determine a flow rate of urine into the reservoir and/or a volume of the urine.

23. The uroflowmetry system of claim 21 or 23, wherein the dock comprises a communications module configured to transmit the measurement signal and/or a signal indicative of the flow rate or volume of the urine to an external server.

24. A funnel for a handheld uroflowmetry device, the funnel being removably connectable with the handheld uroflowmetry device and comprising: a cup portion for capturing a flow of urine from a user, a spout extending from the cup portion and configured to extend into a reservoir of the handheld uroflowmetry device when the funnel is connected to the handheld uroflowmetry device, and a connecting portion configured to removably connect the funnel to the handheld uroflowmetry device.

25. A uroflowmetry method comprising: providing the handheld uroflowmetry device according to any one of claims 1 to 20; collecting urine in the reservoir of the handheld uroflowmetry device; measuring a parameter indicative of the volume of the urine in at least a part of the reservoir using the one or more sensors; and analysing the measurements from the one or more sensors to determine the rate of flow of urine into the handheld uroflowmetry device and/or a volume of the urine.