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WO2013063848A1 - 光电全反射检测渗出液液位的负压伤口治疗系统 - Google Patents

光电全反射检测渗出液液位的负压伤口治疗系统 Download PDF

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Publication number
WO2013063848A1
WO2013063848A1 PCT/CN2011/084447 CN2011084447W WO2013063848A1 WO 2013063848 A1 WO2013063848 A1 WO 2013063848A1 CN 2011084447 W CN2011084447 W CN 2011084447W WO 2013063848 A1 WO2013063848 A1 WO 2013063848A1
Authority
WO
WIPO (PCT)
Prior art keywords
exudate
negative pressure
liquid
pressure wound
detecting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2011/084447
Other languages
English (en)
French (fr)
Inventor
隗刚
郑灿阳
菅冀祁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FORYOU MEDICAL ELECTRONICS CO Ltd
Original Assignee
FORYOU MEDICAL ELECTRONICS CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FORYOU MEDICAL ELECTRONICS CO Ltd filed Critical FORYOU MEDICAL ELECTRONICS CO Ltd
Priority to US14/349,825 priority Critical patent/US9895472B2/en
Priority to EP11874872.2A priority patent/EP2774632B1/en
Publication of WO2013063848A1 publication Critical patent/WO2013063848A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284—Electromagnetic waves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/60—Containers for suction drainage, adapted to be used with an external suction source
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/71—Suction drainage systems
    • A61M1/73—Suction drainage systems comprising sensors or indicators for physical values
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
    • A61M1/98—Containers specifically adapted for negative pressure wound therapy
    • A61M1/982—Containers specifically adapted for negative pressure wound therapy with means for detecting level of collected exudate
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284—Electromagnetic waves
    • G01F23/292—Light, e.g. infrared or ultraviolet
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/296—Acoustic waves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/18—General characteristics of the apparatus with alarm
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3317—Electromagnetic, inductive or dielectric measuring means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3375—Acoustical, e.g. ultrasonic, measuring means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3379—Masses, volumes, levels of fluids in reservoirs, flow rates
    • A61M2205/3389—Continuous level detection
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/70—General characteristics of the apparatus with testing or calibration facilities
    • A61M2205/702—General characteristics of the apparatus with testing or calibration facilities automatically during use

Definitions

  • the invention relates to the technical field of negative pressure wound treatment equipment, in particular to a negative pressure wound treatment system for detecting total exudate liquid level by photoelectric total reflection.
  • Negative pressure wound treatment equipment the United States called
  • a negative pressure wound treatment system includes a negative pressure wound treatment device, a wound site kit, and a container for collecting exudate at the wound (herein referred to as a container as a collection bottle).
  • the wound site kit is used to close the wound and create a negative pressure space.
  • the negative pressure wound treatment device is used to create the required negative pressure of the wound, and the negative pressure wound treatment device consists of a negative pressure source and a controller. Referring to Figure 1, a common negative pressure wound treatment system is shown.
  • the inside of the dotted line is the negative pressure wound treatment device 8; the reference numeral 1 is the skin tissue around the human wound; the filler 2 at the wound covers the wound of the human body; the wound closure 3 is placed above the filling 2 at the wound, and the wound is closed
  • the wound filling 2 is connected to the liquid collecting bottle 5 through the drainage tube 4, thereby guiding the exudate from the wound into the liquid collecting bottle 5, collecting the exudate from the wound through the collecting bottle 5, collecting liquid
  • the other end of the bottle 5 is connected to the negative pressure source 6, and the negative pressure source 6 provides a negative pressure to supply the wound exudate to the liquid collecting bottle 5; the negative pressure source 6 is connected to a controller 7, which is controlled by the controller 7.
  • the negative pressure source 6 achieves control.
  • the device usually has a feature that the liquid collection bottle is equipped with equipment, such as a liquid collection bottle designed into various shapes, such as a long strip shape, which can be closely attached to the device.
  • equipment such as a liquid collection bottle designed into various shapes, such as a long strip shape, which can be closely attached to the device.
  • the negative pressure wound treatment system for detecting the level of the permeate of the photoelectric total reflection of the present invention comprises:
  • Negative pressure wound treatment device with negative pressure source and controller
  • a liquid collecting bottle for collecting the exudate, the side wall of the liquid collecting bottle protruding outwardly to form a convex portion, and an angle ⁇ formed by the opposite sides of the convex portion satisfies: 97.2 degrees ⁇ ⁇ 180 degrees;
  • At least one detection module including:
  • a transmitting unit located on one side of the convex portion, emitting electromagnetic waves or ultrasonic signals to the liquid collecting bottle;
  • the receiving unit correspondingly located on the other side of the convex portion, receiving electromagnetic waves or ultrasonic signals refracted through the liquid collecting bottle;
  • the detection control unit determines whether there is an exudate at the position of the detection module according to whether the receiving unit receives an electromagnetic wave or an ultrasonic signal.
  • the detecting control unit determines that there is no exudate at the position of the detecting module when the receiving unit receives the electromagnetic wave or ultrasonic signal refracted by the liquid collecting bottle; the detecting control unit is totally reflected by the collecting bottle at the receiving unit. When any signal is received, it is judged that there is exudate at the position of the detection module.
  • the electromagnetic wave is any one of infrared rays, visible light, and ultraviolet rays.
  • the liquid collection bottle is provided with a plurality of exudate liquid level height positions, and each of the percolate liquid level height positions corresponds to a detection module.
  • the invention further comprises an alarm device, and a detection control unit of the detection module at the highest exudate liquid level height position, determining whether there is an exudation at the highest exudate liquid level height position according to whether the receiving unit receives the electromagnetic wave or the ultrasonic signal.
  • a detection control unit of the detection module at the highest exudate liquid level height position, determining whether there is an exudation at the highest exudate liquid level height position according to whether the receiving unit receives the electromagnetic wave or the ultrasonic signal.
  • the receiving unit receives the electromagnetic wave or the ultrasonic signal.
  • an alarm trigger signal is sent to the alarm, and the alarm sounds an alarm signal.
  • the detection control unit controls the intensity of electromagnetic waves or ultrasonic waves emitted by the transmitting unit Degree.
  • the detection control unit controls an encoding rule of electromagnetic waves or ultrasonic waves emitted by the transmitting unit, determines whether the receiving code is valid, and further controls whether the receiving unit receives or not.
  • the detection module is 2-10.
  • a display unit is further disposed in the negative pressure wound treatment device, and the display unit is connected to the detection control unit to display a level of the exudate liquid level in the liquid collection bottle.
  • ⁇ is 100 degrees.
  • the liquid collecting bottle is structurally arranged, a convex portion is formed on one side, and the angle formed by the planes of the two side walls of the convex portion is appropriately set, so that the detection on the side of the convex portion is performed.
  • the electromagnetic wave signal or ultrasonic signal emitted by the transmitting unit of the module is totally reflected when there is exudate at the liquid collecting bottle, so that the receiving unit located on the other side of the convex portion receives no signal, and at the liquid collecting bottle When there is no effluent, the signal refracted by the liquid collecting bottle can be received.
  • the set detecting control unit can determine whether there is oozing liquid at the position of the detecting module in the liquid collecting bottle according to whether the receiving unit receives the signal, thereby detecting
  • the liquid level of the wound exudate in the liquid collecting bottle enables the medical staff and the patient to know the amount of the exudate in the liquid collecting bottle in time, so as to find out in time whether the collecting bottle is full, thereby avoiding the backflow of the exudate It is easy to use in the negative pressure wound treatment equipment.
  • FIG. 1 is a schematic structural view of a conventional negative pressure wound treatment system
  • Figure 2 is a schematic view showing the structure of a preferred embodiment of the negative pressure wound treatment system for detecting the level of exudate in the photoelectric total reflection of the present invention
  • FIG. 3 is a top cross-sectional view of the liquid collecting bottle of FIG. 2 and a schematic view of the optical path of part A of FIG. 2;
  • FIG. 4 is a schematic diagram of the optical path when there is no exudate in a liquid collecting bottle;
  • Figure 5 is a schematic diagram of the optical path when there is exudate at some point in the collection bottle.
  • the basic idea of the present invention is: When there is liquid and no liquid in a liquid collecting bottle, the refractive index of electromagnetic waves or ultrasonic waves passing there is different.
  • electromagnetic waves or ultrasonic waves The signal refracted by the liquid collecting bottle is received by the receiving unit.
  • electromagnetic waves or ultrasonic waves totally reflect the transmitted signal through the liquid collecting bottle and the bottle exudate, so that the receiving unit fails to receive the signal. Use this principle to detect the volume of liquid in the collection bottle.
  • the detection module includes a transmitting unit, a receiving unit, and a detecting control unit, and the transmitting unit sends electromagnetic waves or ultrasonic signals to the liquid collecting bottle, and receives the liquid collecting bottle.
  • the negative pressure wound treatment system for detecting the level of exudate in the photoelectric total reflection in this embodiment includes:
  • a liquid collecting bottle 5 which is provided with a convex portion which penetrates the side wall of the liquid collecting bottle in the longitudinal direction, and is formed by a side wall of the liquid collecting bottle protruding from the top to the bottom, and the convex portion is formed.
  • the angle between the two sides 5a, 5b is 100100, the liquid collection bottle is used to collect the wound exudate, see Fig. 3; the negative pressure wound treatment device 8 is composed of the negative pressure source 6 and the controller 7;
  • a wound kit for filling a wound and closing the wound including a wound filler 2, a wound closure 3, and a wound filler 2 connected to the collection bottle 5 through a conduit 4;
  • Each detection module 9 includes:
  • the transmitting unit 91 emits an electromagnetic wave or an ultrasonic signal to the liquid collecting bottle, and is disposed at one side 5a of the convex portion;
  • the receiving unit 92 receives the electromagnetic wave or ultrasonic signal refracted through the liquid collecting bottle, or does not receive any signal due to the total reflection of the liquid collecting bottle, and is disposed opposite to the emitting unit 91 at the other side 5b of the liquid collecting bottle, so that When there is no exudate here, the liquid collecting bottle just receives an electromagnetic wave or ultrasonic signal refracted through the penetrating convex portion.
  • the detecting control unit determines that there is no exudate at the position of the detecting module when the receiving unit receives the electromagnetic wave or ultrasonic signal refracted by the liquid collecting bottle; the detecting control unit receives any signal when the receiving unit receives total reflection due to the liquid collecting bottle Determine the presence of exudate at the location of the test module.
  • the electromagnetic wave used in the present embodiment is infrared rays, and as another embodiment, visible light or ultraviolet light may be used.
  • the liquid level of the wound exudate in the liquid collecting bottle 5 is divided into four gear positions, each gear position corresponds to one detecting module 9, and the infrared receiving signal is received according to the receiving unit of the detecting module 9, and is judged here. Whether there is exudate, and finally the liquid level of the exudate in the liquid collection bottle can be judged by the number of receiving units that can receive the infrared signal.
  • an alarm device (not shown) is further included, and the detection control unit of the detection module at the highest liquid level gear position receives the electromagnetic wave or ultrasonic signal refracted by the liquid collecting bottle according to the receiving unit, or is totally reflected by the liquid collecting bottle No signal is received for judgment. If no signal is received, it is judged that the wound exudate in the liquid collecting bottle is full, and an alarm trigger signal is sent to the alarm device, and the alarm device sends an alarm signal to prompt the medical staff or the patient to promptly Replace the liquid collection bottle.
  • the detection control unit controls the intensity of the electromagnetic wave or ultrasonic wave emitted by the transmitting unit, so that the electromagnetic wave or ultrasonic wave emitted is strong enough to distinguish it from other interference light, and can be received by the receiving unit to improve the sensitivity of the detection.
  • the detection control unit controls the coding rule of the electromagnetic wave or the ultrasonic wave emitted by the transmitting unit, determines whether the received code is valid, and further controls whether the receiving unit receives or not.
  • the number of detection modules can also be 2, 3, 5, 6, 7, 8, 9, or 10 depending on the actual situation.
  • the display unit (not shown) is further disposed in the negative pressure wound treatment device, and the display unit is connected with the detection control unit to display the height level of the wound exudate liquid in the liquid collection bottle, which is convenient for medical personnel. And patient use.
  • FIG. 3 is a top cross-sectional view of the liquid collecting bottle of the embodiment and a schematic view of the optical path of the portion A in FIG. 2.
  • the emitting unit 91 emits infrared rays and passes through the side wall 51 of the liquid collecting bottle.
  • the transflective enters the inner region 52 of the liquid collection bottle, and then exits from the other side of the side wall 51 of the liquid collection bottle, and the receiving unit 92 receives the infrared ray that is refracted; when the liquid is in the liquid collection bottle, the emission unit 91 emits infrared light.
  • the side After passing through the side wall 51 of the liquid collecting bottle, the side penetrates and refracts into the inner region 52 of the liquid collecting bottle, and then is totally reflected by the other side wall 51 of the liquid collecting bottle, so that the receiving unit 92 does not receive infrared rays.
  • Figure 4 is a schematic diagram of the optical path when there is no exudate in a liquid collection bottle.
  • the infrared light path when there is no exudate at the liquid collecting bottle between the shooting unit and the receiving unit is further set to Kl, K2, K3, K4 respectively, and the outer surface of the convex portion of the liquid collecting bottle 5 which is injected by infrared rays is injected.
  • the inner surface of the liquid collecting bottle 5, the inner surface of the convex portion of the liquid collecting bottle 5, and the outer surface of the convex portion of the liquid collecting bottle 5; ⁇ , ⁇ , ⁇ , ⁇ , ⁇ are infrared rays incident on the K1 surface, respectively.
  • the K2 surface is injected, and the ⁇ 2 surface is injected, and the ⁇ 3 surface is injected, and the ⁇ 3 surface is emitted, and the angle between the infrared ray and the normal line when the ⁇ 4 surface is emitted.
  • the angle formed by the plane on both sides of the raised portion is 100 degrees.
  • the convex portion is used for the liquid level monitoring by the matching detecting module, and the front end 5c of the convex portion is a plane which is parallel with the longitudinal section of the liquid collecting bottle. Then, the infrared ray S11 which is incident on the outer surface of the wall of the sump bottle and the infrared ray S13 which is emitted from the outer surface of the wall of the sump bottle are parallel to each other.
  • the receiving unit of each detecting module is disposed on the same horizontal line as the transmitting unit, and the receiving unit can receive the refracted infrared rays, and therefore, it is judged that there is no oozing liquid.
  • Fig. 5 is a schematic diagram of the optical path when there is no exudate in a liquid collecting bottle.
  • the infrared light path when there is no exudate at the liquid collecting bottle between the transmitting unit and the receiving unit is further divided into Kl.
  • K2, K3, K4 are respectively the outer surface of the convex portion of the liquid collecting bottle 5 which is injected by the infrared rays, the inner surface of the convex portion of the liquid collecting bottle 5 which is injected, the inner surface of the convex portion of the liquid collecting bottle 5 which is emitted, and the liquid collecting bottle which is emitted 5
  • the outer surface of the convex portion; a, ⁇ , ⁇ , ⁇ , ⁇ , ⁇ are respectively infrared rays incident on the K1 surface, incident on the K2 surface, injection on the ⁇ 2 surface, injection into the ⁇ 3 surface, injection of the ⁇ 3 surface, and emission of the ⁇ 4 surface when the infrared ray is
  • the angle between the normals The angle formed by the plane on both sides of the raised portion is 100 degrees. Set the wall thickness of the liquid collection bottle to h.
  • Kl and K3 are unlikely to be totally reflected (from a medium with a small refractive index to a medium with a large refractive index).
  • Equation 3 namely:
  • the incident light is totally emitted on the ⁇ 4 surface, it can be realized by the structural design, that is, a convex portion is provided, and the angle between the two sides of the plane is greater than 97.2 degrees. 180 degree.
  • the angle formed by the planes on both sides of the convex portion of the liquid collecting bottle is 100 degrees.
  • the receiving unit does not receive any signal due to total reflection of the liquid collecting bottle, and therefore, it is judged that there is wound exudate in the liquid collecting bottle.
  • the invention utilizes this characteristic and then sets the position of the receiving unit so that it can receive the emitted light only when the liquid collecting bottle has no leakage, and cannot receive the emitted light when the liquid collecting bottle has the exudate. .
  • the negative pressure wound treatment system for detecting the level of exudate in the photoelectric total reflection of the invention makes the use of the negative pressure wound treatment system more intelligent, and can realize the measurement of the liquid level height in the liquid collection bottle of the negative pressure wound treatment device. After measuring the liquid level, the corresponding amount of exudate is also measured.
  • ⁇ is 100 degrees, and in other embodiments, ⁇ may be any value from 97.2 degrees to 180 degrees.
  • the front end of the convex portion is a flat surface. In other embodiments, the curved surface or other irregularly shaped end surface can be formed to achieve the same effect.

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  • Electromagnetism (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Thermal Sciences (AREA)
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  • Engineering & Computer Science (AREA)
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Abstract

一种光电全反射检测渗出液液位的负压伤口治疗系统，包括：具有负压源（6）及控制器（7）的负压伤口治疗设备（8）；用于收集渗出液的集液瓶（5），所述集液瓶（5）的侧壁向外侧突出，形成一凸起部，所述凸起部相对的两侧（5a，5b）所在平面所成的角度θ满足：97.2度<θ<180度；至少一个检测模块（9），包括：发射单元（91），位于凸起部的一侧（5a），向集液瓶（5）发射电磁波或超声波信号；接收单元（92），对应地位于凸起部的另一侧（5b），接收经过集液瓶（5）折射的电磁波或超声波信号；检测控制单元，根据接收单元（92）是否接收到电磁波或超声波信号进行判断检测模块（9）所在位置处是否有渗出液。所述系统能够准确而方便地检测出集液瓶中伤口渗出液的液位高度，使得医护人员及患者能够及时了解到集液瓶内的渗出液的量。

Description

光电全反射检测渗出液液位的负压伤口治疗系统 本申请要求于 2011 年 10 月 31 日提交中国专利局、 申请号为 201110339406.9、 发明名称为"光电全反射检测渗出液液位的负压伤口治疗 系统"的中国专利申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及负压伤口治疗设备技术领域， 尤其涉及一种光电全反射检 测渗出液液位的负压伤口治疗系统。
背景技术
负 压 伤 口 治 疗 设 备 ， 美 国 称 为
Negative— Pressure— Wound— Therapy— Devices, 筒称为 NPWT,其原理为通过 对伤口处施加负压， 来促进伤口的愈合。 根据美国近 10年来的临床表明， 该设备对各种急慢性的伤口处理有着良好的愈合效果。
一般地， 负压伤口治疗系统包括负压伤口治疗设备、 伤口处套件以及 用来收集伤口处渗出液的容器（这里称为此容器为集液瓶）。 其中， 伤口处 套件用于封闭伤口， 制造负压空间。 负压伤口治疗设备用于创造出所需要 的伤口负压， 负压伤口治疗设备， 由一个负压源， 与一个控制器组成。 参 见图 1 , 图中所示为一种常见负压伤口治疗系统。 虚线框内为负压伤口治 疗设备 8; 附图标记 1为人体伤口周围皮肤组织； 伤口处填充物 2将人体 伤口处覆盖； 在伤口处填充物 2的上方设置伤口封闭物 3 , 将伤口封闭， 伤口处填充物 2通过引流管 4连接到集液瓶 5上， 从而将来自伤口的渗出 液导引至集液瓶 5中， 通过集液瓶 5收集来自伤口的渗出液， 集液瓶 5的 另一端与负压源 6连接， 由负压源 6提供负压， 为伤口渗出液流至集液瓶 5提供动力； 负压源 6连接一控制器 7, 由控制器 7对负压源 6实现控制。 该设备通常具有一个特点， 即集液瓶配备设备而设计， 如集液瓶设计成各 种形状， 如长条形等， 可紧贴设备。 在负压伤口治疗系统使用中， 要求当 集液瓶收集的伤口渗出液集满后，不得使渗出液倒流进负压伤口治疗设备， 并需要及时更换集液瓶， 一般采用医护人员或患者直接观测的方式， 来确 定集液瓶是否集满液体， 使用不便。 发明内容
本发明的目的在于， 提供一种光电全反射检测渗出液液位的负压伤口 治疗系统， 能够检测集液瓶内渗出液的液位高度， 为医护人员和患者的使 用提供方便。
为解决上述技术问题， 本发明的光电全反射检测渗出液液位的负压伤 口治疗系统， 包括：
具有负压源及控制器的负压伤口治疗设备；
用于收集渗出液的集液瓶， 所述集液瓶的侧壁向外侧突出， 形成一凸 起部， 所述凸起部相对的两侧所在平面所成的角度 Θ满足： 97.2度 <θ<180 度；
至少一个检测模块， 包括：
发射单元， 位于凸起部的一侧， 向集液瓶发射电磁波或超声波信号； 接收单元， 对应地位于凸起部的另一侧， 接收经过集液瓶折射的电磁 波或超声波信号；
检测控制单元， 根据接收单元是否接收到电磁波或超声波信号判断检 测模块所在位置处是否有渗出液。
优选地， 所述检测控制单元在接收单元接收到经过集液瓶折射的电磁 波或超声波信号时判断检测模块所在位置处没有渗出液； 所述检测控制单 元在接收单元因集液瓶全反射而接收到任何信号时判断检测模块所在位置 处有渗出液。
优选地， 所述电磁波为红外线、 可见光、 紫外线中的任一种。
优选地， 所述集液瓶设有若干个渗出液液位高度档位， 每个渗出液液 位高度档位对应于一个检测模块。
优选地， 还包括警报器， 处于最高渗出液液位高度档位的检测模块的 检测控制单元， 根据接收单元是否接收到电磁波或超声波信号判断最高渗 出液液位高度档位处有渗出液时， 则判断为集液瓶内伤口渗出液已满， 发 出报警触发信号至警报器， 所述警报器发出警报信号。
优选地， 所述检测控制单元控制发射单元发出的电磁波或超声波的强 度。
优选地， 所述检测控制单元控制发射单元发出的电磁波或超声波的编 码规则， 判断接收码是否有效， 进而控制接收单元接收与否。
优选地， 所述检测模块为 2~10个。
优选地， 还包括显示单元， 设置在负压伤口治疗设备中， 所述显示单 元与所述检测控制单元连接， 显示集液瓶中渗出液液位高度档位。
优选地， Θ为 100度。
本发明由于对集液瓶进行结构设置， 使之一侧形成一凸起部， 并对该 凸起部的两侧壁所在平面所成的角度进行合理设置， 使得位于凸起部一侧 的检测模块的发射单元发出的电磁波信号或超声波信号， 在集液瓶处有渗 出液时发生全反射，而使位于凸起部另一侧的接收单元接收不到任何信号， 而在集液瓶处无渗出液时能够接收到经集液瓶折射的信号， 因而， 设置的 检测控制单元可以根据接收单元是否接收到信号来判断集液瓶中检测模块 所在位置处是否有渗出液， 从而检测出集液瓶中伤口渗出液的液位高度， 使得医护人员及患者能够及时了解到集液瓶内的渗出液的量， 以便及时发 现集液瓶是否集满， 从而避免渗出液倒流回负压伤口治疗设备中， 使用方 便。
附图说明
图 1是现有负压伤口治疗系统的结构示意图；
图 2是本发明光电全反射检测渗出液液位的负压伤口治疗系统一优选 实施例的结构示意图；
图 3是图 2中集液瓶俯视剖视图及图 2中 A部分的光路示意图； 图 4是集液瓶某处无渗出液时的光路原理图；
图 5是集液瓶某处有渗出液时的光路原理图。
具体实施方式
本发明的基本构思是： 集液瓶内某处有液体和无液体时， 电磁波或超 声波通过此处时的折射率不同。 在无液体的集液瓶内， 电磁波或超声波通 过集液瓶折射出去的信号被接收单元接收， 在有液体的集液瓶内， 电磁波 或超声波通过集液瓶及瓶内渗出液将发射的信号全反射， 使接收单元未能 接收到信号， 利用这个原理可检测集液瓶中液体的容量。 因此， 在现有的 负压伤口治疗系统， 设置至少一个检测模块， 该检测模块包括发射单元、 接收单元、检测控制单元， 由发射单元向集液瓶发出电磁波或超声波信号， 接收经过集液瓶折射的电磁波或超声波信号， 或因集液瓶全反射未接收到 任何信号， 检测控制单元根据接收单元是否接收到电磁波或超声波信号进 行判断， 若否， 则判断为发射单元发射的电磁波或超声波被集液瓶瓶壁全 反射了， 检测模块所在位置处有伤口渗出液。
以下结合附图， 通过一优选实施例对本发明进行详细说明。
参见图 2 , 本实施例中的光电全反射检测渗出液液位的负压伤口治疗 系统， 包括：
集液瓶 5 , 其设置一凸起部， 该凸起部沿纵向贯穿于集液瓶的侧壁， 由集液瓶的某处侧壁由上至下均向外侧突出而形成， 凸起部的两侧 5a、 5b 所在平面所成的角度 Θ为 100, 该集液瓶用于收集伤口渗出液， 参见图 3 ; 负压伤口治疗设备 8 , 由负压源 6和控制器 7组成；
伤口套件， 用于填充伤口并封闭伤口， 包括伤口填充物 2、 伤口封闭 物 3 , 伤口填充物 2通过管道 4与集液瓶 5连通；
在集液瓶 5凸起部上沿纵向还设有四个检测模块 9 , 每个检测模块对 应一个渗出液液位高度， 每个检测模块 9包括：
发射单元 91 , 向集液瓶发射电磁波或超声波信号， 设置在凸起部的一 侧 5a处；
接收单元 92 ,接收经过集液瓶折射的电磁波或超声波信号， 或因集液 瓶全反射未接收到任何信号，与发射单元 91相对地设置在集液瓶的另一侧 5b处， 使之在集液瓶此处无渗出液时， 刚好接收到经过穿透凸起部折射的 电磁波或超声波信号。
检测控制单元在接收单元接收到经过集液瓶折射的电磁波或超声波 信号时判断检测模块所在位置处没有渗出液； 所述检测控制单元在接收单 元因集液瓶全反射而接收到任何信号时判断检测模块所在位置处有渗出 液。 其中， 本实施例中采用的电磁波为红外线， 作为另外的实施方式， 也 可采用可见光或紫外线。
其中， 集液瓶 5内伤口渗出液液位高度分为四个档位， 每个档位对应 于一个检测模块 9 ,根据该检测模块 9的接收单元接收到红外线信号与否， 判断此处是否有渗出液， 最终通过能接收到红外线信号的接收单元数量即 可判断出集液瓶内渗出液的液位高度。
其中， 还包括警报器 （图中未示出）， 处于最高液位高度档位的检测 模块的检测控制单元根据接收单元接收经过集液瓶折射的电磁波或超声波 信号， 或因集液瓶全反射未接收到任何信号进行判断， 若未接收到信号， 则判断为集液瓶内伤口渗出液已满， 发出报警触发信号至警报器， 该警报 器发出警报信号， 以提示医护人员或患者及时更换集液瓶。
其中， 检测控制单元控制发射单元发出的电磁波或超声波的强度， 使 得发出的电磁波或超声波强度足以使之能够与其他干扰光区别开来， 能够 被接收单元接收到， 以提高检测的灵敏度。
其中， 检测控制单元控制发射单元发出的电磁波或超声波的编码规 贝' J , 判断接收码是否有效， 进而控制接收单元接收与否。
其中， 根据实际情况， 检测模块的数量也可为 2、 3、 5、 6、 7、 8、 9 或 10个。
其中， 还包括显示单元（图中未示出）， 设置在负压伤口治疗设备中， 该显示单元与检测控制单元连接，显示集液瓶中伤口渗出液液位高度档位， 便于医护人员及患者使用。
以下对本发明所用原理进行说明。
参见图 3 , 图 3为本实施例集液瓶俯视剖视图及图 2中 A部分的光路 示意图， 集液瓶内无液体时， 发射单元 91发出红外线， 经过集液瓶的侧壁 51一侧穿透折射进入集液瓶内部区域 52 , 然后再从集液瓶的侧壁 51另一 侧射出， 接收单元 92接收到穿透折射过来的红外线； 集液瓶内有液体时， 发射单元 91发出红外线经过集液瓶的侧壁 51—侧穿透折射进入集液瓶内 部区域 52 , 然后再经过集液瓶的另一侧侧壁 51全反射， 使接收单元 92未 接收到红外线。
参见图 4, 图 4为集液瓶中某处无渗出液时的光路示意图， 下面对发 射单元、 接收单元之间的集液瓶该处无渗出液时的红外线光路做进一步 设 Kl , K2, K3 , K4分别为红外线射入的集液瓶 5凸起部外表面， 射 入的集液瓶 5外壳内表面， 射出的集液瓶 5凸起部内表面， 射出的集液瓶 5凸起部外表面； α, β, φ, γ, τ, λ分别为红外线射入 Kl面， 射入 K2面， 射出 Κ2面， 射入 Κ3面， 射出 Κ3面， 射出 Κ4面时红外线与法线的夹角。 Θ为凸起部两侧所在平面所成的夹角， 为 100度。 设集液瓶壁厚为 h。
设集液瓶的瓶壁折射率为 L1 , 空气中折射率约为 1 , 由折射定律： sina - Llsin = sincp, 则 a φ· 同理可得 λ = γ· 由于对称性， φ = λ.所以 a = λ。
由此， 对于凸起部两侧所在平面成 100度， 此凸起部就是配合检测模 块用来进行液位监测， 凸起部的前端 5c为一平面， 与集液瓶的纵向截面平 行。 则射入集液瓶瓶壁外表面的红外线 S11与射出集液瓶瓶壁外表面的红 外线 S13相互平行。
因此， 如图 4所示， 每个检测模块的接收单元与发射单元设置在同一 水平线上， 接收单元能够接收到经过折射的红外线， 因此， 判断出此处无 渗出液。
参见图 5, 图 5为集液瓶中某处无渗出液时的光路示意图， 下面对发 射单元、 接收单元之间的集液瓶该处无渗出液时的红外线光路做进一步分 设 Kl , K2, K3 , K4分别为红外线射入的集液瓶 5凸起部外表面， 射 入的集液瓶 5凸起部内表面， 射出的集液瓶 5凸起部内表面， 射出的集液 瓶 5凸起部外表面； a, β, φ, γ, τ, λ分别为红外线射入 Kl面， 射入 K2 面， 射出 Κ2面， 射入 Κ3面， 射出 Κ3面， 射出 Κ4面时红外线与法线的 夹角。 Θ为凸起部两侧所在平面所成的夹角，为 100度。设集液瓶壁厚为 h。
θ = γ + φ ( 1 ) 殳集液瓶瓶壁的折射率为 L1 ; 渗出液（透明 )折射率为 L2 (实际 折射率用水的 1.33计算）； 空气折射率为 1 (实际约为 1.0003 )。 arcsin(— ) = 48.6度 根据折射率公式： sin = Lx β = L2 sin φ sin = sin τ = L2 sin γ
4个界面中， Kl与 K3是不可能发生全反射的 （从折射率小的介质入 射到折射率大的介质）。
Κ2也不可能发生全反射。 （见公式 2, 肯定会存在 ^， 让光线可以入射 到渗出液。 不难理解， 光线从空气中射入到集液瓶壁， 已经限制了从集液 瓶壁到渗出液的入射角， 使之不可能大道可以发生全反射)。
这里仅讨论 Κ4界面发生全反射的可能性。
在图 5中， 入射角 ^发生全反射的前提是：
Figure imgf000009_0001
根据式 3, 即：
arcsm . ( Λ— ) .
为渗出液介质的临界角。 根据式 2, 可得出如下结论：
L2 sin = sin <= 1 ( φ <=
Figure imgf000009_0003
显然， 当^ 2arCSm (丄) = 97.2时， 由于式 8 , 必然存在： γ >- arcsm(—— ) 且 Θ大于 97.2度小于 180度， 条件就满足。 此时在 Κ4界面， 光线是 会发生全反射的。 此时无论入射角 "为多少， 光线始终不能到达 Κ4 的另 一面。
综上所述， 若要使入射光线在 Κ4面上发生全发射， 可以通过结构上 的设计得以实现， 即设置一凸起部， 其两侧所在平面所成的夹角 Θ要大于 97.2度小于 180度。
本实施例中， 通过集液瓶的设计， 使集液瓶凸起部两侧所在平面所成 的夹角 Θ为 100度。 参见图 5 , 接收单元因集液瓶发生全反射未接收到任 何信号， 因此， 判断为集液瓶中此处有伤口渗出液。
本发明即利用此特性再通过接收单元的位置设置， 使之在集液瓶无渗 出液情况下恰好接收到出射光线， 而在集液瓶有渗出液的情况下无法接收 到该出射光线。
本发明的光电全反射检测渗出液液位的负压伤口治疗系统， 使得负压 伤口治疗系统的使用更加智能化， 并能够实现负压伤口治疗设备集液瓶内 液体液位高度的测量， 测得液位高度后， 相应的渗出液的量也就测得了。
本实施例中， Θ为 100度， 在其他实施例中， Θ可以为 97.2度〜 180度 中任意一值。 本实施例中， 凸起部的前端为平面， 在其他实施例中， 可以 做成弧面或其他不规则的形状的端面， 都能达到同样的效果。
以上对本发明进行了详细介绍， 文中应用具体个例对本发明的原理及 实施方式进行了阐述， 以上实施例的说明只是用于帮助理解本发明的方法 及其核心思想。 应当指出， 对于本技术领域的普通技术人员来说， 在不脱 离本发明原理的前提下， 还可以对本发明进行若干改进和修饰， 这些改进 和修饰也落入本发明权利要求的保护范围内。

Claims

权 利 要 求
1、 一种光电全反射检测渗出液液位的负压伤口治疗系统， 其特征在 于， 包
括：
具有负压源及控制器的负压伤口治疗设备；
用于收集渗出液的集液瓶， 所述集液瓶的侧壁向外侧突出， 形成一凸 起部， 所述凸起部相对的两侧所在平面所成的角度 Θ满足： 97.2度 <θ<180 度；
至少一个检测模块， 包括：
发射单元， 位于凸起部的一侧， 向集液瓶发射电磁波或超声波信号； 接收单元， 对应地位于凸起部的另一侧， 接收经过集液瓶折射的电磁 波或超声波信号；
检测控制单元， 根据接收单元是否接收到电磁波或超声波信号判断检 测模块所在位置处是否有渗出液。
2、 如权利要求 1 所述的光电全反射检测渗出液液位的负压伤口治疗 系统， 其特征在于， 所述检测控制单元在接收单元接收到经过集液瓶折射 的电磁波或超声波信号时判断检测模块所在位置处没有渗出液； 所述检测 控制单元在接收单元因集液瓶全反射而接收到任何信号时判断检测模块所 在位置处有渗出液。
3、 如权利要求 1 所述的光电全反射检测渗出液液位的负压伤口治疗 系统， 其特征在于， 所述电磁波为红外线、 可见光、 紫外线中的任一种。
4、 如权利要求 1 所述的光电全反射检测渗出液液位的负压伤口治疗 系统， 其特征在于， 所述集液瓶设有若干个渗出液液位高度档位， 每个渗 出液液位高度档位对应于一个检测模块。
5、 如权利要求 4所述的光电全反射检测渗出液液位的负压伤口治疗 系统， 其特征在于， 还包括警报器， 处于最高渗出液液位高度档位的检测 模块的检测控制单元， 根据接收单元是否接收到电磁波或超声波信号判断 最高渗出液液位高度档位处有渗出液时， 则判断为集液瓶内伤口渗出液已 满， 发出报警触发信号至警报器， 所述警报器发出警报信号。
6、 如权利要求 1 所述的光电全反射检测渗出液液位的负压伤口治疗 系统， 其特征在于， 所述检测控制单元控制发射单元发出的电磁波或超声 波的强度。
7、 如权利要求 1 所述的光电全反射检测渗出液液位的负压伤口治疗 系统， 其特征在于， 所述检测控制单元控制发射单元发出的电磁波或超声 波的编码规则， 判断接收码是否有效， 进而控制接收单元接收与否。
8、 如权利要求 1 所述的光电全反射检测渗出液液位的负压伤口治疗 系统， 其特征在于， 所述检测模块为 2~10个。
9、 如权利要求 4所述的光电全反射检测渗出液液位的负压伤口治疗 系统， 其特征在于， 还包括显示单元， 设置在负压伤口治疗设备中， 所述 显示单元与所述检测控制单元连接， 显示集液瓶中渗出液液位高度档位。
10、 如权利要求 1所述的光电全反射检测渗出液液位的负压伤口治疗 系统， 其特征在于， Θ为 100度。
PCT/CN2011/084447 2011-10-31 2011-12-22 光电全反射检测渗出液液位的负压伤口治疗系统 Ceased WO2013063848A1 (zh)

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