WO2021199881A1

WO2021199881A1 - Medical device having imaging guidewire

Info

Publication number: WO2021199881A1
Application number: PCT/JP2021/008367
Authority: WO
Inventors: 泰徳山下; 丸山　智司
Original assignee: テルモ株式会社
Priority date: 2020-03-30
Filing date: 2021-03-04
Publication date: 2021-10-07
Also published as: JPWO2021199881A1

Abstract

[Problem] To provide a medical device having an imaging guidewire and being capable of suppressing adhesion of a foreign matter to an electrical contact member of the imaging guidewire when a connector is disconnected from the rear end of the imaging guidewire. [Solution] The present invention provides a medical device 10 having an imaging guidewire 100, the medical device 10 including a cap 200 and a connector 300 in addition to the imaging guidewire. The imaging guidewire includes: a wire section 110; an imaging sensor 120 that is provided in the wire section and that obtains an image of a luminal organ; and an electrical contact member 140 that is exposed and provided at the rear end 130 of the proximal side of the wire section and that is electrically connected to the imaging sensor. In this medical device, the connector is attached to the rear end of the imaging guidewire when an image of a luminal organ is obtained. The cap is attached to the rear end of the imaging guidewire in place of the connector when the connector is disconnected from the rear end of the imaging guidewire.

Description

Medical device with image guide wire

The present invention relates to a medical device having an image guide wire.

In the treatment of strictures or obstructions that occur in luminal organs such as blood vessels and vessels, test waves such as sound waves or light are used to observe these properties or to observe the condition after treatment. An image of the luminal organ is acquired. In order to make it possible to acquire an image of a luminal organ at a relatively low cost, a medical device having an image guide wire including an image sensor has been proposed (see Patent Document 1).

The image guide wire is arranged to be exposed at the wire portion, the image sensor arranged on the wire portion to acquire an image of the lumen organ, and the rear end portion on the hand side of the wire portion, and is electrically connected to the image sensor. It has an electrical contact part. The connector connected to the control device is removably connected to the rear end of the image guide wire. By electrically connecting the electrical contact portion and the connector, signals are exchanged between the image sensor and the control device. The therapeutic catheter has a lumen through which the image guide wire is inserted and is inserted along the image guide wire to a predetermined position in the biological lumen of the luminal organ.

Patent No. 4878823

When replacing the catheter, the connector must be pulled out from the rear end of the image guide wire. Since the electrical contacts are exposed by pulling out the connector, foreign matter such as blood may adhere to the electrical contacts when the catheter is replaced. In such a case, if the connector is reconnected to the image guide wire to acquire an image of the luminal organ, noise due to foreign matter adhering to the electrical contact portion may occur and the image of the luminal organ may not be accurately acquired. be.

The above-mentioned Patent Document 1 does not disclose any solution to the above-mentioned problem that may occur when the connector is pulled out from the rear end of the image guide wire.

The present invention provides a medical device having an image guide wire capable of suppressing adhesion of foreign matter to the electrical contact portion of the image guide wire when the connector is pulled out from the rear end portion of the image guide wire. With the goal.

A medical device having an image guide wire according to the present invention that achieves the above object has an image guide wire, a cap, and a connector. The image guide wire is arranged so as to be exposed on a wire portion, an image sensor arranged on the wire portion to acquire an image of a lumen organ, and a rear end portion on the hand side of the wire portion, and is electrically attached to the image sensor. It has an electrical contact that is connected to. The cap is removably attached to the rear end of the image guide wire to cover the electrical contacts. The connector is removably attached to the rear end of the image guide wire and is electrically connected to the electrical contact. In this medical device, the connector is attached to the posterior end of the image guide wire when acquiring an image of the luminal organ. Then, when the connector is pulled out from the rear end portion of the image guide wire, the cap is attached to the rear end portion of the image guide wire in place of the connector.

According to the medical device having the image guide wire according to the present invention, when the connector is pulled out from the rear end portion of the image guide wire, a cap is attached to the rear end portion of the image guide wire instead of the connector. Since the electrical contact portion of the image guide wire is covered by the cap, it is possible to suppress the adhesion of foreign matter to the electrical contact portion.

It is a schematic diagram which shows the structure of the medical device which has an image guide wire. It is a schematic diagram which shows the usage situation of the medical device which has an image guide wire. It is a schematic diagram which shows the state which inserted the image guide wire into the lumen of a catheter in the use example of the medical device which has an image guide wire. FIG. 4 (A) is a cross-sectional view of a main part showing a state when the cap is removed from the rear end of the image guide wire, and FIG. 4 (B) is attached by inserting the cap into the rear end of the image guide wire. It is sectional drawing of the main part which shows the state at the time. FIG. 5 (A) is a cross-sectional view of a main part showing a state when the connector is pulled out from the rear end of the image guide wire, and FIG. 5 (B) is attached by inserting the connector into the rear end of the image guide wire. It is sectional drawing of the main part which shows the state at the time. FIG. 6A is a cross-sectional view of a main part showing a state when the cap according to the modified example is removed from the rear end portion of the image guide wire, and FIG. 6B is a modified example at the rear end portion of the image guide wire. It is sectional drawing of the main part which shows the state when the cap which concerns on is inserted and attached.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the technical scope of the present invention should be determined based on the description of the claims, and is not limited to the following embodiments. In the following description, the hand side (right side in FIG. 1) of the image guide wire is referred to as "base end", and the side inserted into the body cavity (left side in FIG. 1) is referred to as "tip". Further, in order to facilitate understanding, the length direction of the image guide wire is shortened, and the thickness direction of the image guide wire is exaggerated and schematically shown. The ratio of the length direction to the thickness direction is actually Is different.

FIG. 1 is a schematic diagram showing the configuration of the medical device 10 having the image guide wire 100, and FIG. 2 is a schematic diagram showing the usage status of the medical device 10 having the image guide wire 100.

The medical device 10 having the image guide wire 100 according to the embodiment is outlined with reference to FIGS. 1 and 2. The medical device 10 has an image guide wire 100, a cap 200, and a connector 300. The image guide wire 100 is arranged on the wire portion 110, the image sensor 120 arranged on the wire portion 110 to acquire an image of the lumen organ, and the image sensor 120 exposed on the rear end portion 130 on the hand side of the wire portion 110. It has an electrical contact portion 140 that is electrically connected to the. The cap 200 is removably attached to the rear end 130 of the image guide wire 100 and covers the electrical contact 140. The connector 300 is removably attached to the rear end 130 of the image guide wire 100 and is electrically connected to the electrical contact 140. In this medical device 10, the connector 300 is attached to the rear end 130 of the image guide wire 100 when acquiring an image of a luminal organ. Then, when the connector 300 is pulled out from the rear end 130 of the image guide wire 100, the cap 200 is attached to the rear end 130 of the image guide wire 100 instead of the connector 300. The medical device 10 also has a control device 400 to which the image guide wire 100 is connected. The medical device 10 also has an extension wire 500 used when changing the length of the wire portion 110 of the image guide wire 100. Hereinafter, the configuration of the medical device 10 will be described in detail.

(Image guide wire 100)
The image guide wire 100 is arranged on the wire portion 110, the image sensor 120 arranged on the wire portion 110 to acquire an image of the lumen organ, and the image sensor 120 exposed on the rear end portion 130 on the hand side of the wire portion 110. It has an electrical contact portion 140 that is electrically connected to the.

The wire portion 110 includes a tip member 111 arranged on the tip side and a main body member 112 arranged on the base end side of the tip member 111. The total length of the wire portion 110 is not particularly limited, but is, for example, about 200 to 5000 mm. The tip member 111 has a core material composed of a flexible or elastic core wire, and a highly flexible resin material fixed around the core material. The tip member 111 has a columnar shape whose outer diameter is constant along the longitudinal direction, and the tip is formed to be rounded. In the resin material of the tip member 111, a filler made of a material having contrast properties (X-ray opaque material, etc.) is dispersed, thereby forming a contrast portion. The main body member 112 is composed of a flexible or elastic core wire. The core material of the tip member 111 and the core material of the main body member 112 are joined by welding, for example. The constituent material of the core material is not particularly limited as long as it has flexibility, and various metal materials such as stainless steel, piano wire, cobalt-based alloys, and superelastic alloys can be used. The outer diameter of the tip member 111 is smaller than the outer diameter of the main body member 112. In the wire portion 110, the tip member 111 on the tip side thereof is highly flexible, and the main body member 112 on the base end side has relatively high rigidity. As a result, the wire portion 110 has both the flexibility of the tip and excellent operability (pushing property, torque transmission property, etc.).

The image sensor 120 is arranged at the tip of the main body member 112 in the wire portion 110. The image sensor 120 is composed of a phased array in which a plurality of sensor elements are arranged in a ring shape. By using such a phased array type image sensor 120, an image of a luminal organ can be acquired at once over a wide range in the circumferential direction without rotating the image sensor 120. The sensor element is not particularly limited, and includes an intravascular ultrasonic (IVUS) sensor element, an optical coherence tomography (OCT) sensor element, and the like. A window portion (not shown) is formed on the main body member 112 at a position facing the sensor element, the inspection wave from the sensor element is irradiated to the luminal organ through the window portion, and the reflected inspection wave is received through the window portion.

The rear end portion 130 of the wire portion 110 is formed so as to project toward the base end side of the main body member 112. The rear end 130 has a cylindrical shape. The outer diameter of the rear end portion 130 is smaller than the outer diameter of the main body member 112. The rear end portion 130 is formed of an electrically insulating resin material and is fixed to the core material of the main body member 112.

The electrical contact portion 140 has a plurality of terminal portions 141. Each terminal portion 141 has a rectangular shape and is arranged so as to be exposed on the peripheral surface of the rear end portion 130. Adjacent terminal portions 141 are electrically insulated. The sensor element of the image sensor 120 and the terminal portion 141 are arranged in a pair. The pair of sensor elements and the terminal portion 141 are electrically connected via a signal line 142.

(Cap 200)
The cap 200 is attached so as to be inserted into the rear end portion 130 of the image guide wire 100 from the base end side. The cap 200 has a substantially cylindrical shape in which a recess 210 is formed, and the base end side is rounded. The outer diameter of the cap 200 on the tip end side is substantially equal to the outer diameter on the base end side of the main body member 112. The outer diameter of the cap 200 on the distal end side may be smaller than the outer diameter on the proximal end side of the main body member 112. The largest portion of the outer diameter of the cap 200 is equal to or less than the largest portion of the outer diameter of the wire portion 110 of the image guide wire 100. When the maximum outer diameter of the cap 200 is equal to or less than the maximum outer diameter of the wire portion 110 (for example, the maximum outer diameter of the main body member 112), the clearance between the catheter lumen and the image guide wire 100 is very small. This is because the usability of the image guide wire 100 and the catheter is not deteriorated. Further, the length of the cap 200 is not particularly limited, and may be a long cap 200 or a short cap 200 depending on the catheter to be replaced. When the cap 200 is attached to the rear end 130 of the image guide wire 100, the rear end 130 fits into the recess 210 of the cap 200 and covers the electrical contact 140.

The detailed configuration of the cap 200 will be further described with reference to FIGS. 4 (A) and 4 (B).

FIG. 4A is a cross-sectional view of a main part showing a state when the cap 200 is removed from the rear end portion 130 of the image guide wire 100, and FIG. 4B is a cap on the rear end portion 130 of the image guide wire 100. It is a cross-sectional view of a main part which shows the state when 200 is inserted and attached.

The cap 200 has a sealing mechanism 220 that prevents foreign matter from reaching the electrical contact portion 140 when attached to the image guide wire 100. The sealing mechanism 220 includes a sealing surface 221 of the cap 200 and an O-ring 222 held at the rear end 130 of the image guide wire 100. When the cap 200 is attached to the image guide wire 100 (FIG. 4B), the O-ring 222 is elastically compressed between the rear end 130 of the image guide wire 100 and the sealing surface 221 of the cap 200. As a result, it is possible to prevent foreign matter from reaching the electrical contact portion 140 through the minute gap between the image guide wire 100 and the cap 200.

The cap 200 further has a removing layer 230 capable of removing foreign matter adhering to the electrical contact portion 140. The removal layer 230 is arranged at a portion of the recess 210 of the cap 200 that comes into contact with the electrical contact portion 140. By inserting and removing the cap 200, the removal layer 230 wipes off or adsorbs foreign matter adhering to the electrical contact portion 140. As a result, foreign matter adhering to the electrical contact portion 140 is removed. The member constituting the removal layer 230 is not limited as long as it exerts a function of wiping off or adsorbing foreign matter, and examples thereof include a perforated plate and a non-woven fabric formed of a resin material. The material of the removal layer 230 is preferably electrically insulating because a part of the material of the removal layer 230 may remain in the electrical contact portion 140 when the cap 200 is inserted and removed.

The recess 210 of the cap 200 is formed with an annular recess 211 that fits into the annular convex 131 formed at the rear end 130 of the image guide wire 100. When the cap 200 is inserted into the rear end portion 130 of the image guide wire 100 and attached, the annular recess 211 and the annular protrusion 131 fit into each other. This ensures that the cap 200 is attached to the rear end 130 of the image guide wire 100.

In the figure, reference numeral 132 indicates a ring member 132 that prevents the O-ring 222 from coming off, and reference numeral 133 indicates an electrically insulating holding member 133 that holds the terminal portion 141 of the electrical contact portion 140.

(Connector 300)
As shown in FIG. 2, the connector 300 is attached to the rear end portion 130 of the image guide wire 100 so as to be inserted from the proximal end side. The connector 300 has a substantially cylindrical shape in which the recess 310 is formed. On the inner surface of the recess 310, a conductive portion 320 (not shown in FIG. 2), which will be described later, is electrically connected to each terminal portion 141 of the electrical contact portion 140. The outer diameter of the connector 300 on the tip end side is substantially equal to the outer diameter of the main body member 112. When the connector 300 is attached to the rear end 130 of the image guide wire 100, the rear end 130 fits into the recess 310 of the connector 300 and is electrically connected to the electrical contact 140.

The detailed configuration of the connector 300 will be further described with reference to FIGS. 5 (A) and 5 (B).

FIG. 5A is a cross-sectional view of a main part showing a state when the connector 300 is pulled out from the rear end portion 130 of the image guide wire 100, and FIG. 5B is a connector to the rear end portion 130 of the image guide wire 100. It is a cross-sectional view of a main part which shows the state when 300 is inserted and attached.

In the connector 300, a conductive portion 320 electrically connected to each terminal portion 141 of the electrical contact portion 140 is insert-molded on the inner surface of the recess 310. The signal line 321 connected to each conductive portion 320 is also insert-molded. The terminal portion 141 of the electrical contact portion 140 and the conductive portion 320 are arranged in a pair. When the connector 300 is attached to the image guide wire 100 (FIG. 5B), the paired terminal portions 141 and the conductive portion 320 come into contact with each other and are electrically connected. In order to bring the paired terminal portions 141 and the conductive portion 320 into contact with each other, a regulating portion (not shown) that regulates the relative position between the rear end portion 130 of the image guide wire 100 and the connector 300 is arranged. .. The restricting portion can be configured, for example, by forming an uneven fitting portion extending along the insertion / removal direction of the connector 300 on the image guide wire 100 and the connector 300.

Like the cap 200, the connector 300 has a sealing mechanism 330 that prevents foreign matter from reaching the electrical contact portion 140 when attached to the image guide wire 100. The sealing mechanism 330 includes a sealing surface 331 of the connector 300 and an O-ring 222 held at the rear end 130 of the image guide wire 100.

Similar to the recess 210 of the cap 200, the recess 310 of the connector 300 is formed with an annular recess 311 that fits into the annular convex 131 formed at the rear end 130 of the image guide wire 100. When the connector 300 is inserted into the rear end 130 of the image guide wire 100 and attached, the annular recess 311 and the annular protrusion 131 fit into each other. This ensures that the connector 300 is attached to the rear end 130 of the image guide wire 100.

(Control device 400)
As shown in FIG. 2, the control device 400 is connected to the image guide wire 100 via the cable 410. A connector 300 connected to the image guide wire 100 is attached to one end of the cable 410, and another connector 420 connected to the control device 400 is attached to the other end. The cable 410 (including the connectors 300 and 420) is a disposable component. The control device 400 has a main body 430 and a monitor 440. The main body unit 430 is mainly composed of a CPU, a memory, and an input / output unit, and controls the entire medical device 10. For example, the main body 430 outputs a control signal for emitting an inspection wave to the image sensor 120, inputs a detection signal from the image sensor 120, and acquires image data based on the detection signal. In addition, the main body 430 displays information based on the acquired image data on the monitor 440.

(Extension wire 500)
As shown in FIG. 1, the extension wire 500 is used when changing the length of the wire portion 110 of the image guide wire 100. The extension wire 500 is attached so as to be inserted into the rear end portion 130 of the image guide wire 100 from the proximal end side. The base end side of the extension wire 500 is configured in the same manner as the rear end portion 130 of the wire portion 110. The tip end side of the extension wire 500 is configured in the same manner as the connector 300, and a conductive portion 510 electrically connected to each terminal portion 141 of the electrical contact portion 140 is arranged.

(Example of using the medical device 10 having the image guide wire 100)
FIG. 3 is a schematic view showing a state in which the image guide wire 100 is inserted into the lumen 610 of the catheter 600 in a usage example of the medical device 10 having the image guide wire 100.

In the state shown in FIG. 3, the extension wire 500 is used, and the length of the wire portion 110 of the image guide wire 100 is changed to be longer. When inserting the image guide wire 100 into the lumen of the living body, first, the cap 200 is attached so as to be inserted into the rear end portion 130 of the image guide wire 100 from the proximal end side (FIG. 4 (B)). As a result, the rear end portion 130 is fitted into the recess 210 of the cap 200, and the electrical contact portion 140 is covered. Therefore, it is possible to reduce the adhesion of foreign matter to the electrical contact portion 140 during the work of inserting the image guide wire 100. Further, the sealing mechanism 220 further suppresses foreign matter from reaching the electrical contact portion 140.

When the image guide wire 100 is inserted to a predetermined position in the biological lumen, the catheter 600 is inserted along the image guide wire 100 to a predetermined position in the biological lumen as shown by a left-pointing arrow in FIG.

The cap 200 is maintained in the state of being attached to the image guide wire 100 until the connector 300 is attached to the image guide wire 100. Therefore, in the work performed before attaching the connector 300 to the image guide wire 100 (when inserting the image guide wire 100, when inserting the catheter 600, when changing the length of the image guide wire 100, etc.), foreign matter is present. Can be prevented from adhering to the electrical contact portion 140.

Next, the cap 200 is removed from the rear end 130 of the image guide wire 100 (FIG. 4A), and the connector 300 is attached to the rear end 130 of the image guide wire 100 so as to be inserted from the base end side (FIG. 5). (B)). As a result, the terminal portion 141 of the pair of electrical contact portions 140 and the conductive portion 320 of the connector 300 come into contact with each other and are electrically connected. The other connector 420 of the cable 410 is connected to the control device 400 (FIG. 2).

The main body 430 of the control device 400 outputs a control signal for emitting an inspection wave to the image sensor 120, inputs a detection signal from the image sensor 120, and acquires image data based on the detection signal. In addition, the main body 430 displays information based on the acquired image data on the monitor 440.

After acquiring the image of the luminal organ by the signal from the image sensor 120, the catheter 600 may be replaced and the work of acquiring the image of the luminal organ again may be performed. When performing this work, first, the connector 300 is pulled out from the rear end 130 of the image guide wire 100 (FIG. 5A), and the cap 200 is attached to the rear end 130 of the image guide wire 100 from the base end side. Attach it so that it can be inserted (Fig. 4 (B)). As a result, the rear end portion 130 is fitted into the recess 210 of the cap 200, and the electrical contact portion 140 is covered. Further, when the cap 200 is attached, the removal layer 230 of the cap 200 wipes off or adsorbs foreign matter adhering to the electrical contact portion 140. As a result, foreign matter adhering to the electrical contact portion 140 is removed.

As shown by the right-pointing arrow in FIG. 3, the catheter 600 is removed from the living lumen along the image guide wire 100. When it is necessary to change the length of the wire portion 110 of the image guide wire 100, the extension wire 500 is further added and used, or the used extension wire 500 is removed.

After that, a new catheter 600 is inserted along the image guide wire 100 to a predetermined position in the living lumen. The cap 200 remains attached to the image guide wire 100 until the connector 300 is attached to the image guide wire 100. Therefore, it is possible to prevent foreign matter from adhering to the electrical contact portion 140 during the replacement work of the catheter 600.

As described above, the medical device 10 of the present embodiment has the image guide wire 100, the cap 200, and the connector 300, and the cap 200 pulls out the connector 300 from the rear end 130 of the image guide wire 100. At that time, it is attached to the rear end 130 of the image guide wire 100 instead of the connector 300.

With this configuration, the cap 200 covers the electrical contact portion 140, so that when the connector 300 is pulled out from the rear end portion 130 of the image guide wire 100, the image guide wire 100 is connected to the electrical contact portion 140. Adhesion of foreign matter can be suppressed. Therefore, when the connector 300 is reconnected to the image guide wire 100 to acquire an image of the luminal organ, noise due to foreign matter adhering to the electrical contact portion 140 is suppressed, and the image of the luminal organ is accurately obtained. Can be obtained.

The cap 200 is maintained in a state of being attached to the image guide wire 100 until the connector 300 is attached to the image guide wire 100. With this configuration, during the work performed before attaching the connector 300 to the image guide wire 100 (when inserting the image guide wire 100, when inserting the catheter 600, when replacing the catheter 600, when the image guide wire 100 is used. It is possible to reduce the adhesion of foreign matter to the electrical contact portion 140 during the work of changing the length of the wire.

The cap 200 has a sealing mechanism 220 that prevents foreign matter from reaching the electrical contact portion 140 when attached to the image guide wire 100. With such a configuration, the sealing mechanism 220 further suppresses foreign matter from reaching the electrical contact portion 140.

The cap 200 has a removing layer 230 capable of removing foreign matter adhering to the electrical contact portion 140. With this configuration, the removal layer 230 of the cap 200 wipes off or adsorbs foreign matter adhering to the electrical contact portion 140. As a result, foreign matter adhering to the electrical contact portion 140 is removed, and the state of electrical connection can be stably maintained. As a result, images of luminal organs can be acquired more accurately and stably.

The image sensor 120 is composed of a phased array in which a plurality of sensor elements are arranged in a ring shape. With this configuration, the image of the luminal organ can be acquired at once over a wide range in the circumferential direction without rotating the image sensor 120.

The largest portion of the outer diameter of the cap 200 is equal to or less than the largest portion of the outer diameter of the wire portion 110 of the image guide wire 100. With this configuration, even if the clearance between the lumen 610 of the catheter 600 and the image guide wire 100 is small, the usability of the image guide wire 100 and the catheter 600 does not deteriorate.

(Modification example of cap)
FIG. 6A is a cross-sectional view of a main part showing a state when the cap 201 according to the modified example is removed from the rear end portion 130 of the image guide wire 100, and FIG. 6B is a rear end of the image guide wire 100. It is sectional drawing of the main part which shows the state when the cap 201 which concerns on the modification is inserted into the part 130 and attached.

The cap 201 of the modified example is different from the cap 200 of the embodiment in that the shape and the configuration of the sealing mechanism 250 are modified.

The cap 201 of the modified example has a cylindrical shape in which a through hole 240 penetrating from the tip end to the base end is formed. The outer diameter of the cap 201 on the tip end side is substantially equal to the outer diameter of the main body member 112. When the cap 201 is attached to the rear end 130 of the image guide wire 100, the rear end 130 is housed in the through hole 240 of the cap 200 to cover the electrical contact 140.

The sealing mechanism 250 of the cap 201 can be modified to an appropriate configuration as long as it exerts a function of suppressing foreign matter from reaching the electrical contact portion 140 when the cap 201 is attached to the image guide wire 100. In the modified example, the sealing mechanism 250 is composed of a valve body 260 arranged on the proximal end side of the portion covering the electrical contact portion 140. The valve body 260 has an opening 261 and urges an elastic force in a direction in which the opening 261 is always closed. On the tip side of the portion covering the electrical contact portion 140, the annular convex portion 131 formed on the rear end portion 130 of the image guide wire 100 and the annular concave portion 241 of the cap 201 are fitted to each other to provide a sealing property. Be maintained. Even with such a configuration, it is possible to prevent foreign matter from reaching the electrical contact portion 140 through a minute gap between the image guide wire 100 and the cap 201.

The cap 201 of the modified example can connect the connector to the rear end 130 of the image guide wire 100 through the opening 261 of the valve body 260. Further, the cap 201 of the modified example may be configured so as not to be removed from the image guide wire 100.

This application is based on Japanese Patent Application No. 2020-060745 filed on March 30, 2020, the disclosure of which is cited as a whole by reference.

10 medical devices,
100 image guide wire,
110 wire part,
111 tip member,
112 body member,
120 image sensor,
130 rear end,
140 electrical contacts,
141 terminal part,
142 signal line,
200, 201 cap,
210 recess,
220 seal mechanism,
221 Seal surface,
222 O-ring,
230 removal layer,
240 through hole,
250 seal mechanism,
260 valve body,
261 opening,
300 connector,
310 recess,
320 Conductive part,
321 signal line,
330 Seal mechanism,
331 seal surface,
400 controller,
410 cable,
420 other connectors,
430 body,
440 monitor,
500 extension wire,
510 Conductive part,
600 catheter,
610 lumen.

Claims

The wire portion, the image sensor arranged on the wire portion to acquire an image of the lumen organ, and the electrical portion exposed on the rear end portion on the hand side of the wire portion and electrically connected to the image sensor. Image guide wire, with contacts,
A cap that is removably attached to the rear end of the image guide wire to cover the electrical contacts, and a removably attached to the rear end of the image guide wire that is electrically connected to the electrical contacts. Have a connector to be
The connector is attached to the rear end of the image guide wire when an image of the luminal organ is acquired.
The cap is a medical device having an image guide wire, which is attached to the rear end portion of the image guide wire in place of the connector when the connector is pulled out from the rear end portion of the image guide wire.
The medical device having the image guide wire according to claim 1, wherein the cap is maintained in a state of being attached to the image guide wire until the connector is attached to the image guide wire.
The medical device having the image guide wire according to claim 1 or 2, wherein the cap has a sealing mechanism for preventing foreign matter from reaching the electrical contact portion when attached to the image guide wire.
The medical device having the image guide wire according to any one of claims 1 to 3, wherein the cap has a removing layer capable of removing foreign matter adhering to the electrical contact portion.
The image sensor is a medical device having the image guide wire according to any one of claims 1 to 4, which is composed of a phased array in which a plurality of sensor elements are arranged in a ring shape.
A wire portion, an image sensor arranged on the wire portion to acquire an image of a lumen organ, and an electrical portion exposed on the rear end portion on the hand side of the wire portion and electrically connected to the image sensor. It has an image guide wire having a contact portion, and a cap that is removably attached to the rear end portion of the image guide wire and covers the electrical contact portion.
A medical device having an image guide wire, wherein the largest portion of the outer diameter of the cap is equal to or less than the largest portion of the outer diameter of the wire portion.