WO2018221404A1 - Catheter device - Google Patents

Abstract

The catheter device according to one embodiment of the present invention is provided with: a tube to be inserted in a human body; and a light emission part which is provided to the leading end side of the tube and emits an infrared beam for confirmation of the position of the tube. The light emission part has: a base material that extends in the tube extension direction; a first infrared emission element which is mounted to the base material and which has an optical axis in a first direction orthogonal to the extension direction; and a second infrared emission element which is mounted to the base material, which has an optical axis in a second direction being orthogonal to the extension direction and being different from the first direction, and which is disposed so as to be juxtaposed to the first infrared emission element in the extension direction. This configuration enables detecting of the position of the tube properly without making the leading end of the tube of the catheter device thicker than necessary.

Description

Catheter device

The present invention relates to a catheter device, and more particularly to a catheter device capable of accurately grasping the tip position of a tube to be inserted into the body.

The tube feeding catheter device is used to send nutrients and medicines to the stomach of patients who are unable to eat or drink by themselves due to disturbance of consciousness or muscle weakness. In this method using a catheter device, a tube is inserted into the body from the mouth or nose to reach the stomach, and a nutrient or the like is sent from outside the body to the stomach through the tube. Infusion alone may cause a decline in the ability of the digestive system such as the stomach and intestine, but there is also a merit that it is possible to suppress the decline in the ability of the digestive system by sending a nutrient or the like directly to the stomach through a tube.

In such a method using a catheter device, care must be taken so that the tube does not accidentally enter the airway. In view of this, an imaging line is put in the catheter device and confirmed by X-rays. However, X-ray handling management is complicated and the apparatus configuration is complicated.

There is also a method for confirming whether the tube has reached the stomach by detecting whether gastric juice has been detected using a pH sensor. However, gastric acid may be detected before the tube reaches the stomach due to gastric acid reflux or the like, and accurate position detection cannot be performed.

Here, Patent Document 1 discloses a catheter including a plurality of visual elements. That is, a catheter system is disclosed that includes a fixed visual element and a movable visual element that allow a user to capture multiple images of a lesion at various angles. In this catheter system, an LED is provided at the tip of the tube to irradiate light and improve the quality of an image captured by a visual element.

Also, Patent Document 2 discloses an internal body light-emitting device that is inserted into a thin tube in a living body to emit light. The apparatus includes a main body portion made of a flexible and light-transmitting tubular body sealed at both ends, at least one light emitting portion provided in the main body portion, and a light emitting portion for causing the light emitting portion to emit light. Light emitting means. In this in-vivo region light-emitting device, the body and the veterinarian can accurately recognize the position and running state of the tubule in laparoscopic surgery etc. by emitting light after being inserted into the living body. It has become.

Special table 2008-526360 gazette JP 2007-222388 A

A light emitting element that emits infrared light that passes through the human body is provided at the tip of the tube, and the device that detects the position of the tube by emitting light after the tube has been inserted into the body depends on the orientation characteristics of the light emitting element. Infrared light may not be detected accurately outside the body. That is, when the tube is inserted into the human body, the tube is made to reach the target position while being bent or rotated by the insertion path. Therefore, it is not known in which direction the light emitting element provided at the distal end portion of the tube is inserted in the human body. Therefore, depending on the orientation of the light emitting element, there is a problem that infrared light emitted from the light emitting element inside the body does not reach the light receiving device outside the body sufficiently and cannot be detected accurately. On the other hand, it is only necessary to arrange a plurality of light emitting elements so as to surround the entire circumference of the distal end portion of the tube, but the distal end portion of the tube becomes thick and workability when inserting the tube is deteriorated, which is a burden on the patient. Is also connected.

An object of the present invention is to provide a catheter device that can accurately detect the position of a tube without making the tip of the tube thicker than necessary.

In order to solve the above problems, a catheter device according to one embodiment of the present invention includes a tube inserted into the body, a light emitting unit that is provided on the distal end side of the tube and emits infrared light for confirming the position of the tube, Is provided. The light emitting unit is mounted on the base material extending in the extending direction of the tube, the first infrared light emitting element mounted on the base material and having the optical axis in the first direction orthogonal to the extending direction, and the base material, The first infrared light emitting element and the second infrared light emitting element juxtaposed in the extending direction have an optical axis in a second direction orthogonal to the extending direction and different from the first direction.

According to such a configuration, the first infrared light emitting element and the second infrared light emitting element are juxtaposed in the extending direction of the tube as the light emitting portion provided on the distal end side of the tube, and the optical axis directions are different from each other. Therefore, infrared light can be emitted at a wide angle without increasing the outer diameter of the light emitting part.

In the catheter apparatus, the base material has a plate-like substrate, and the substrate has a first substrate portion having a mounting surface for the first infrared light emitting element and a second substrate portion having a mounting surface for the second infrared light emitting element. And a connecting portion provided between the first substrate portion and the second substrate portion and twisted from the mounting surface of the first substrate portion to the mounting surface of the second substrate portion. Thereby, the light emission part which mounted the 1st infrared light emitting element and the 2nd infrared light emitting element from which an optical axis direction mutually differs can be comprised by twisting one plate-shaped board | substrate.

In the catheter apparatus, the base material has a plate-like substrate, and the substrate has a first substrate portion having a mounting surface for the first infrared light emitting element and a second substrate portion having a mounting surface for the second infrared light emitting element. And a connecting portion that is provided between the first substrate portion and the second substrate portion and connects the mounting surface of the first substrate portion and the mounting surface of the second substrate portion so as to be inclined with respect to each other. Also good. Thereby, the mounting surface of the first substrate portion and the mounting surface of the second substrate portion are inclined with respect to each other via the connecting portion, and the first infrared light emitting device and the second infrared light emitting device having different optical axis directions from each other. It is possible to configure a light emitting unit mounted with.

In the catheter device, the base material includes a resin body having a wiring pattern on the surface, and the resin body includes a first resin portion having a first mounting surface on which the first infrared light emitting element is mounted, and a second infrared ray. And a second resin portion having a second mounting surface on which the light emitting element is mounted, and the first mounting surface and the second mounting surface may be provided so as to be inclined with respect to each other. Accordingly, the first infrared light emitting element is mounted on the first mounting surface made of the resin body, and the second infrared light emitting element is mounted on the second mounting surface, so that the first infrared light emitting elements having different optical axis directions from each other are mounted. And the light emission part which mounted the 2nd infrared light emitting element can be comprised.

In the catheter device, the first resin portion and the second resin portion may be provided integrally. Thereby, the light emission part which mounted the 1st infrared light emitting element and the 2nd infrared light emitting element from which an optical axis direction mutually differs with one resin body can be comprised.

In the above catheter device, a reflecting member having a higher reflectance than the resin body at the wavelength of light emitted from the first infrared light emitting element and the second infrared light emitting element may be provided on the surface of the resin body. Thereby, the light which returned to the resin body side among the infrared light emitted from the first infrared light emitting element and the second infrared light emitting element can be efficiently reflected by the reflecting member on the surface of the resin body, and is emitted from the light emitting portion. The amount of infrared light emitted can be increased.

In the catheter device, the first direction and the second direction may be different from each other by 30 degrees or more and 150 degrees or less. Thereby, the orientation angle of the infrared light emitted from both the first infrared light emitting element and the second infrared light emitting element can be widened.

According to the present invention, it is possible to provide a catheter device that can accurately detect the position of the tube without making the tip of the tube thicker than necessary.

It is a schematic diagram which illustrates the catheter apparatus which concerns on this embodiment. It is a perspective view which shows the structural example (the 1) of a light emission part. It is a schematic diagram which illustrates the orientation range of a light emission part. (A) And (b) is a perspective view which illustrates the manufacturing method of a light emission part. It is a perspective view which shows the structural example (the 2) of a light emission part. (A) And (b) is a perspective view which illustrates the manufacturing method of a light emission part. It is a perspective view which shows the structural example (the 3) of a light emission part. It is a perspective view which shows the structural example (the 4) of a light emission part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same members are denoted by the same reference numerals, and the description of the members once described is omitted as appropriate.

(Configuration of catheter device)
FIG. 1 is a schematic view illustrating a catheter device according to this embodiment.
The catheter device 1 according to the present embodiment includes a tube 10 to be inserted into a human body 100 and a light emitting unit 20 provided on the distal end side of the tube 10. The catheter device 1 shown in FIG. 1 further includes a light receiving unit 30 and a control unit 50. As an example, the catheter device 1 inserts the tube 10 into the body from the mouth or nose, and allows the tip of the tube 10 to reach the stomach via the esophagus. Then, nutrients and medicines are sent to the stomach through the tube 10 from outside the body. Thereby, a nutrient, a medicine, etc. can be sent directly to a patient's stomach.

A connector 15 is connected to the rear end side of the tube 10, and a cable C 10 is connected to the connector 15. The cable C10 is connected to the control unit 50. The tube 10 is provided with a wiring 25 such as a power supply line. One end of the wiring 25 is connected to the light emitting unit 20, and the other end of the wiring 25 is connected to the connector 15. The connector 15 serves to conduct the wiring 25 of the tube 10 and the cable C10.

In addition, the connector 15 is provided with an insertion port 151 that communicates with a mouth on the other end side of the tube 10 (a mouth outside the body). Nutrients, medicines and the like can be put into the tube 10 from the inlet 151.

The light emitting unit 20 is provided with an infrared light emitting element to be described later. The wavelength of infrared light emitted from the infrared light emitting element is, for example, about 650 nm to 1000 nm that can pass through the human body 100. Thereby, when the tube 10 is inserted into the body, infrared light emitted from the light emitting unit 20 provided on the distal end side of the tube 10 can be received outside the body. The position of the tube 10 can be confirmed by the infrared light received outside the body. The light emitting unit 20 is protected by a cap 20c. The inside of the light emitting unit 20 can be waterproofed by the cap 20c, and workability when the tube 10 is inserted into the human body 100 is enhanced by the smooth outer shape of the cap 20c.

The light receiving unit 30 is a part that receives infrared light emitted from the light emitting unit 20 and transmitted through the human body 100. The light receiving unit 30 is disposed at a position close to the human body 100 outside the body. For example, when it is desired to make the tip of the tube 10 reach the stomach, the light receiving unit 30 is disposed near the stomach outside the body. The light receiving unit 30 is connected to the control unit 50 by a cable C30. An electrical signal based on the infrared light received by the light receiving unit 30 is sent to the control unit 50 via the cable C30.

The control unit 50 is a part that controls each unit such as the light emitting unit 20 and the light receiving unit 30. The control unit 50 includes an operation button 53 and a display 55. The control unit 50 performs energization control to the light emitting unit 20 via the cable C10. That is, the power for operating the light emitting unit 20 is supplied from the control unit 50 to the light emitting unit 20 via the cable C10 and the wiring 25 of the tube 10.

The display 55 displays the detection result by the light receiving unit 30. For example, when the signal based on the intensity of the infrared light detected by the light receiving unit 30 exceeds a predetermined value, a display indicating “detected” is performed. In addition, a numerical value, a graph, a picture, or the like corresponding to the signal intensity may be displayed. The control unit 50 may notify the user that “detected” has been made. The operation button 53 is used when switching the display 55 or changing the setting.

In order to use the catheter device 1, first, the tube 10 and the connector 15 are connected, and the cable C10 is connected to the connector 15 to be connected to the control unit 50. Further, the light receiving unit 30 is connected to the control unit 50 by the cable C30.

Next, power is supplied from the control unit 50 to the light emitting unit 20 via the cable C10 and the wiring 25 of the tube 10, and infrared light is emitted. In this state, the tube 10 is inserted into the body through the mouth and nose. On the other hand, the light receiving unit 30 is arranged outside the body near the position where the tip of the tube 10 is desired to reach. For example, when it is desired to insert the tube 10 up to the stomach, the light receiving unit 30 is disposed around the stomach (upper abdomen) outside the body.

In this state, the tube 10 is inserted into the body. When the distal end of the tube 10 reaches the stomach, the infrared light emitted from the light emitting unit 20 passes through the human body 100 and reaches the light receiving unit 30. When infrared light is received by the light receiving unit 30, a signal corresponding to the amount of light is sent to the control unit 50 via the cable C30. When this signal exceeds a preset value, a message indicating that the signal has reached the display 55 of the control unit 50 is displayed.

On the other hand, when the distal end of the tube 10 does not reach the stomach, the amount of infrared light received by the light receiving unit 30 is small, so that the display 55 is not displayed. Thereby, the user can recognize whether or not the tip of the tube 10 has reached the stomach by the display 55.
In the above example, the tip position is detected while the tube 10 is inserted into the body. However, the tube 10 may be provided with a scale indicating the length from the tip. In this case, the tube 10 can be inserted into the body using the scale as a guide, and after the insertion to the target length, detection can be performed by applying the light receiving unit 30.

(Configuration example of light emitting part: Part 1)
FIG. 2 is a perspective view showing a configuration example (No. 1) of the light emitting unit. In FIG. 2, the cap 20c is omitted for convenience of explanation.
The light emitting unit 20 of the configuration example (part 1) includes a substrate 200 that is a base material extending in the extending direction D0 of the tube 10, and a first infrared light emitting element 211 and a second infrared light emitting element 212 mounted on the substrate 200. And have. Here, the extending direction D0 of the tube 10 refers to a direction in which the tube 10 extends when the tube 10 is straightened.

The substrate 200 is, for example, a flexible substrate on which a wiring pattern is formed. The substrate 200 includes a first substrate portion 210, a second substrate portion 220, and a connecting portion 250. The connecting portion 250 is a portion that is provided between the first substrate portion 210 and the second substrate portion 220 and connects the two. The first substrate portion 210, the second substrate portion 220, and the connecting portion 250 are configured by one substrate 200.

The first infrared light emitting element 211 is mounted on the mounting surface 210 a of the first substrate portion 210. In the present embodiment, the first infrared light emitting element 211 is mounted on each of the front and back surfaces of the first substrate portion 210. The second infrared light emitting element 212 is mounted on the mounting surface 220 a of the second substrate portion 220. In the present embodiment, the second infrared light emitting element 212 is mounted on each of the front and back surfaces of the second substrate portion 220. The second substrate portion 220 is juxtaposed with the first substrate portion 210 in the extending direction D0. As a result, the second infrared light emitting element 212 is juxtaposed with the first infrared light emitting element 211 in the extending direction D0.

In addition, the substrate 200 is twisted at the connecting portion 250 provided between the first substrate portion 210 and the second substrate portion 220. In the present embodiment, the substrate 200 is twisted about 90 degrees by the connecting portion 250 from the mounting surface 210a of the first substrate portion 210 to the mounting surface 220a of the second substrate portion 220.

The direction of the optical axis of the first infrared light emitting element 211 mounted on the mounting surface 210a of the first substrate portion 210 is a first direction D1 orthogonal to the extending direction D0. The direction of the optical axis of the second infrared light emitting element 212 mounted on the mounting surface 220a of the second substrate portion 220 is a second direction D2 that is orthogonal to the extending direction D0 and different from the first direction D1. Since the substrate 200 is twisted by about 90 degrees by the connecting portion 250, the first direction D1 and the second direction D2 are different from each other by 90 degrees.

In such a light emitting unit 20, the first infrared light emitting element 211 and the second infrared light emitting element 212 are juxtaposed in the extending direction D0 of the tube 10, so that the light emitting element is not increased without increasing the outer diameter of the light emitting unit 20. The number of can be increased. Moreover, since the optical axis directions (the first direction D1 and the second direction D2) of the first infrared light emitting element 211 and the second infrared light emitting element 212 are different from each other, the light emitting unit 20 as a whole has a wide angle of infrared rays. Light can be emitted.

FIG. 3 is a schematic view illustrating the orientation range of the light emitting part.
FIG. 3 shows a state in which the light emitting unit 20 is viewed from the extending direction D0. For convenience of explanation, the first infrared light emitting element 211 is indicated by a solid line, and the second infrared light emitting element 212 is indicated by a two-dot chain line.
Here, the infrared light emission range (orientation range S1) of the first infrared light emitting element 211 is set to about 90 degrees, and the infrared light emission range (orientation range S2) of the second infrared light emitting element 212 is set to about 90 degrees. Suppose that Since the first infrared light emitting element 211 is mounted on the front and back of the first substrate portion 210, a range of about 90 degrees on one side (upper side) of the first substrate portion 210 and about 90 on the other side (lower side). Infrared light is emitted in the range of degrees.

In addition, since the second infrared light emitting element 212 is mounted on the front and back of the second substrate portion 220, a range of about 90 degrees on one side (right side) of the second substrate portion 220 and about the other side (left side). Infrared light is emitted in the range of 90 degrees. Therefore, if the optical axis direction (first direction D1) of the first infrared light emitting element 211 and the optical axis direction (second direction D2) of the second infrared light emitting element 212 are 90 degrees different from each other, As a whole, infrared light can be emitted over the entire circumference (360 degrees) around the central axis in the extending direction D0.

The orientation range S1 of the first infrared light emitting element 211 and the orientation range S2 of the second infrared light emitting element 212 are grasped by, for example, FFP (Far Field Pattern). Further, the difference between the first direction D1 and the second direction D2 may be determined by the relationship between the orientation range S1 of the first infrared light emitting element 211 and the orientation range S2 of the second infrared light emitting element 212, and is approximately 30 degrees. More than 150 degrees.

By using the tube 10 having such a light emitting unit 20 on the distal end side, when the tube 10 is inserted into the body and reaches a target position, the light emitting unit can be used regardless of the orientation of the distal end of the tube 10. 20 emits infrared light in a wide range. Therefore, infrared light can be accurately received by the light receiving unit 30, and the tip position of the tube 10 can be accurately detected.

4A and 4B are perspective views illustrating a method for manufacturing the light emitting unit.
First, as shown in FIG. 4A, a flat substrate 200 having a plate shape, particularly a thin plate shape, is prepared. The substrate 200 is, for example, a flexible substrate, and a wiring pattern is formed on the front and back surfaces in advance. Next, the first infrared light emitting element 211 is mounted on the mounting surface 210 a of the first substrate portion 210, and the second infrared light emitting element 212 is mounted on the mounting surface 220 a of the second substrate portion 220.

Next, as shown in FIG. 4B, the connecting portion 250 of the substrate 200 is twisted. For example, the second substrate portion 220 is twisted 90 degrees with respect to the first substrate portion 210. In order to maintain the twisted state, the periphery of the connecting portion 250 may be hardened with an adhesive or the like. It is desirable to make the width of the connecting portion 250 of the substrate 200 narrower than the width of the first substrate portion 210 and the second substrate portion 220 so that the connecting portion 250 can be easily twisted. Thereby, the light emitting unit 20 is completed.

(Configuration example of light emitting unit: 2)
FIG. 5 is a perspective view showing a configuration example (No. 2) of the light emitting unit. In FIG. 5, the cap 20c is omitted for convenience of explanation.
In the configuration example (part 2) of the light emitting unit 20, the configuration example (part 1) in that the light emitting unit 20 includes the substrate 200 and the first infrared light emitting element 211 and the second infrared light emitting element 212 mounted on the substrate 200. It is the same. In the configuration example (No. 2), the mounting surface 210 a of the first substrate portion 210 and the mounting surface 220 a of the second substrate portion 220 of the substrate 200 are inclined with respect to each other via the connecting portion 250. Thereby, the light emission part 20 which mounted the 1st infrared light emitting element 211 and the 2nd infrared light emitting element 212 from which an optical axis direction mutually differs is comprised.

In the configuration example (No. 2), the first substrate portion 210, the second substrate portion 220, and the connecting portion 250 are configured by one substrate 200. The connecting portion 250 is configured by bending a part of the substrate 200. Thereby, similarly to the configuration example (No. 1), the number of the light emitting elements can be increased without increasing the outer diameter of the light emitting unit 20, and the first infrared light emitting element 211 and the second infrared light emitting element 212 are mutually connected. Since the optical axis directions (the first direction D1 and the second direction D2) are different, infrared light can be emitted at a wide angle as a whole of the light emitting unit 20.

6A and 6B are perspective views illustrating a method for manufacturing the light emitting unit.
First, as shown in FIG. 6A, a flat substrate 200 having a plate shape, particularly a thin plate shape, is prepared. The substrate 200 is, for example, a flexible substrate, and a wiring pattern is formed on the front and back surfaces in advance. Next, the first infrared light emitting element 211 is mounted on the mounting surface 210 a of the first substrate portion 210, and the second infrared light emitting element 212 is mounted on the mounting surface 220 a of the second substrate portion 220.

The substrate 200 is provided with a first slit SL1 and a second slit SL2. The first slit SL1 is provided between the first substrate portion 210 and the connecting portion 250. The first slit SL1 is formed by making a cut in a direction orthogonal to the side surface from the side surface on one side of the substrate 200 to the center. The second slit SL2 is provided between the second substrate portion 220 and the connecting portion 250. The second slit SL2 is formed by making a cut in a direction orthogonal to the side surface from the other side surface to the center of the substrate 200.

Next, as shown in FIG. 6B, half of the connecting portion 250 of the substrate 200 is bent. Since the first slit SL1 and the second slit SL2 are provided by cutting the substrate 200 from the opposite side surface to the center, half of the connecting portion 250 is bent along the center in the extending direction D0 of the substrate 200. Will be. The bending angle is set to 90 degrees, for example. Thereby, the optical axis direction (first direction D1) of the first infrared light emitting element 211 mounted on the mounting surface 210a of the first substrate portion 210 and the second infrared light mounted on the mounting surface 220a of the second substrate portion 220. The optical axis direction (second direction D2) of the light emitting element 212 is different from each other (for example, 90 degrees different). As a result, the light emitting unit 20 as a whole can emit infrared light at a wide angle.

According to the manufacturing method shown in FIGS. 4 and 6, the light emitting unit 20 having different mounting angles 210 a and 220 a can be configured by one flexible substrate. Note that the twisting angle of the connecting portion 250 shown in FIG. 4B and the bending angle of the connecting portion 250 shown in FIG. 6B are not limited to 90 degrees.

(Configuration example of light emitting part: Part 3)
FIG. 7 is a perspective view showing a configuration example (No. 3) of the light emitting unit. In FIG. 7, the cap 20c is omitted for convenience of explanation.
The light emitting unit 20 includes a resin body 300 that is a base material extending in the extending direction D0 of the tube 10, and a first infrared light emitting element 211 and a second infrared light emitting element 212 mounted on the resin body 300.

The resin body 300 is a resin molded product having a wiring pattern on the surface. The resin body 300 is, for example, a MID (Molded Interconnect Device), and is formed by forming a wiring pattern on a resin injection molded product.

The resin body 300 includes a first resin portion 310 and a second resin portion 320. That is, the first resin portion 310 and the second resin portion 320 are integrally provided. The first resin portion 310 is provided with a first mounting surface 310a for mounting the first infrared light emitting element 211, and the second resin portion 320 is provided with a second mounting surface 320a for mounting the second infrared light emitting element 212. The second resin portion 320 is juxtaposed with the first resin portion 310 in the extending direction D0. In the resin body 300, the first mounting surface 310a and the second mounting surface 320a are provided so as to be inclined with respect to each other.

Accordingly, the first infrared light emitting element 211 is mounted on the first mounting surface 310a constituted by the resin body 300, and the second infrared light emitting element 212 is mounted on the second mounting surface 320a, so that the optical axis directions are different from each other. The light emitting unit 20 on which the first infrared light emitting element 211 and the second infrared light emitting element 212 are mounted can be configured. In this configuration example (No. 3), the first mounting surface 310a and the second mounting surface 320a are inclined by 90 degrees. Thereby, the first direction D1 and the second direction D2 are different from each other by 90 degrees.

In such a light emitting unit 20, the first infrared light emitting element 211 and the second infrared light emitting element 212 are juxtaposed in the extending direction D0 of the tube 10, so that the light emitting element is not increased without increasing the outer diameter of the light emitting unit 20. The number of can be increased. Moreover, since the optical axis directions (the first direction D1 and the second direction D2) of the first infrared light emitting element 211 and the second infrared light emitting element 212 are different from each other, the light emitting unit 20 as a whole has a wide angle of infrared rays. Light can be emitted.

In addition, by configuring the resin body 300 with a molded product, the first mounting surface 310a and the second mounting surface 320a that are inclined to each other can be configured accurately and easily.

(Configuration example of light emitting part: Part 4)
FIG. 8 is a perspective view showing a configuration example (No. 4) of the light emitting unit. In FIG. 8, the cap 20c is omitted for convenience of explanation.
In the configuration example (No. 4) of the light emitting unit 20, the configuration example (No. 4) is provided in that the light emitting unit 20 includes the resin body 300 and the first infrared light emitting element 211 and the second infrared light emitting element 212 mounted on the resin body 300. Same as 3). In the configuration example (No. 4), the reflecting member 350 is provided on the surface of the resin body 300.

The reflection member 350 is made of a material having a higher reflectance than the resin body 300 at the wavelength of light emitted from the first infrared light emitting element 211 and the second infrared light emitting element 212. For example, the area of the reflective member 350 is larger than the area of the wiring pattern provided on the surface of the resin body 300. Accordingly, the infrared light emitted from the first infrared light emitting element 211 and the second infrared light emitting element 212 that has been reflected in the body can be efficiently reflected by the reflecting member 350 on the surface of the resin body 300.

For example, since the resin body 300 is a molded product, it is mainly composed of a black resin. If the wide range of the surface of the resin body 300 is black, the absorption rate of infrared light increases. Therefore, a reflecting member 350 having a high reflectance of infrared light is formed on the surface of the resin body 300. The reflecting member 350 is formed on the surface of the resin body 300 by plating (for example, gold plating), for example. The reflection member 350 may be configured by providing a wide wiring pattern on the surface of the resin body 300.

The reflecting member 350 can provide an infrared light reflector effect. That is, when infrared light is emitted from the light emitting unit 20 with the tube 10 inserted into the body, light that has returned to the resin body 300 side of the emitted infrared light (for example, light reflected by the cap 20c) is reflected. The member 350 can be efficiently reflected. Thereby, compared with the case where the reflection member 350 is not provided, the amount of infrared light reflected by the surface of the resin body 300 can be increased, and the detection accuracy of infrared light at the light receiving unit 30 can be increased. .

As described above, according to the present embodiment, infrared light can be emitted at a wide angle from the light emitting unit 20 provided at the tip of the tube 10 without making the tip of the tube 10 thicker than necessary. The infrared light can be detected by the light receiving unit 30 outside the body regardless of the direction of the tip of the tube 10. Therefore, it is possible to provide the catheter device 1 that can accurately detect the tip position of the tube 10.

Although the present embodiment has been described above, the present invention is not limited to these examples. For example, in the above-described embodiment, an example in which the tube 10 is inserted into the body from the mouth or nose has been shown. However, the present invention is applicable even when the tube 10 is inserted from a hole opened in the body by an anus or treatment. Moreover, although the example in which the 1st infrared light emitting element 211 and the 2nd infrared light emitting element 212 were juxtaposed as the light emission part 20 in the extending direction D0 was shown, three or more infrared light emitting elements are juxtaposed in the extending direction D0. May be. In this case, it is desirable that the optical axis directions of the plurality of infrared light emitting elements are different from each other.

In addition, those in which those skilled in the art appropriately added, deleted, and changed the design of the above-described embodiments, and combinations of the features of each embodiment as appropriate also include the gist of the present invention. As long as they are within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Catheter apparatus 10 ... Tube 15 ... Connector 20 ... Light emission part 20c ... Cap 25 ... Wiring 30 ... Light receiving part 50 ... Control part 53 ... Operation button 55 ... Display body 100 ... Human body 151 ... Insertion port 200 ... Substrate 210 ... First board Part 210a ... Mounting surface 211 ... First infrared light emitting element 220 ... Second substrate part 220a ... Mounting surface 212 ... Second infrared light emitting element 250 ... Connecting part 300 ... Resin body 310 ... First resin part 310a ... First mounting surface 320 Second resin portion 320a Second mounting surface 350 Reflective member C10 Cable C30 Cable D0 Extension direction D1 First direction D2 Second direction S1 Orientation range S2 Orientation range SL1 First slit SL2 ... second slit

Claims (7)

A tube inserted into the body,
A light emitting part that is provided on the distal end side of the tube and emits infrared light for confirming the position of the tube;
With
The light emitting unit
A base material extending in the extending direction of the tube;
A first infrared light emitting element mounted on the substrate and having an optical axis in a first direction orthogonal to the extending direction;
A second infrared light emitting device mounted on the base material, having an optical axis in a second direction perpendicular to the extending direction and different from the first direction, and juxtaposed with the first infrared light emitting element in the extending direction. And a catheter device. The base material has a plate-like substrate,
The substrate is
A first substrate portion having a mounting surface of the first infrared light emitting element;
A second substrate portion having a mounting surface of the second infrared light emitting element;
2. A connection portion provided between the first substrate portion and the second substrate portion and twisted from the mounting surface of the first substrate portion to the mounting surface of the second substrate portion. Catheter device. The base material has a plate-like substrate,
The substrate is
A first substrate portion having a mounting surface of the first infrared light emitting element;
A second substrate portion having a mounting surface of the second infrared light emitting element;
A connection portion that is provided between the first substrate portion and the second substrate portion and connects the mounting surface of the first substrate portion and the mounting surface of the second substrate portion so as to be inclined with respect to each other; The catheter device according to claim 1. The base material has a resin body provided with a wiring pattern on the surface,
The resin body is
A first resin portion having a first mounting surface for mounting the first infrared light emitting element;
A second resin portion having a second mounting surface on which the second infrared light emitting element is mounted;
The catheter device according to claim 1, wherein the first mounting surface and the second mounting surface are provided so as to be inclined with respect to each other. The catheter device according to claim 4, wherein the first resin portion and the second resin portion are integrally provided. 6. The reflective body having a reflectance higher than that of the resin body at a wavelength of light emitted from the first infrared light emitting element and the second infrared light emitting element is provided on the surface of the resin body. The catheter device according to 1. The catheter device according to any one of claims 1 to 6, wherein the first direction and the second direction are different from each other by 30 degrees or more and 150 degrees or less.

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