JP2022112907A - Medical elongated body, visualization method and training method - Google Patents

Abstract

To provide a medical long body that can have a visual marker provided thereon with a high degree of freedom, and a visual identification method therefor and a training method.SOLUTION: This medical long body, as a catheter, has a long body 20 that extends along the axial direction, the long body 20 having an inner layer 31 and an outer layer 30, with a visual marker 45 provided between the inner layer 31 and the outer layer 30. Between the inner layer 31 and the outer layer 30, provided is a reinforcement body, and the reinforcement body is provided with the visual marker 45. The visual marker 45 may include a light emitter to emit light in response to the light applied thereto.SELECTED DRAWING: Figure 5

Description

TECHNICAL FIELD The present invention relates to a long body for medical use, which allows visual recognition of an insertion position in a living body, a visual recognition method thereof, and a training method.

Medical elongated bodies such as catheters and guidewires are percutaneously inserted into the body. The state of the distal end side of the medical elongated body inserted into the living body is confirmed by X-ray imaging. The medical strip is provided with imaging markers so that it can be imaged with X-rays.

In some cases, the medical elongate body is provided with a visual recognition marker that can be visually recognized through an endoscope in vivo. For example, Japanese Patent Application Laid-Open No. 2002-300001 discloses a medical elongated body provided with such a visual recognition marker. Also, the visual recognition marker may be provided at the hand portion of the medical elongated body to determine the insertion length of the medical elongated body.

JP 2008-264498 A

Since the visual recognition marker of Patent Document 1 is formed by raising the outer surface of the long body for medical use, it causes a change in the sliding resistance, and is difficult to insert into the body at the hand portion of the long body for medical use. Not suitable for long viewing. In the hand portion of the long body for medical use, it is possible to make it easier to visually recognize by coloring the visual recognition marker. However, if a visible marker is provided on the outer surface of the elongated body for medical use by post-processing using laser marking or pigment, the manufacturing cost increases.

The present invention has been made to solve the above-described problems, and aims to provide a long body for medical use in which visual markers can be provided with a high degree of freedom, a visual recognition method thereof, and a training method.

A medical elongated body according to the present invention for achieving the above object has a elongated body main body elongated along an axial direction,
The elongated main body has an inner layer and an outer layer,
A visual marker is provided between the inner layer and the outer layer.

In the method for visually recognizing a long body for medical use according to the present invention for achieving the above object, a long body body elongated along an axial direction has an inner layer and an outer layer, and light is emitted between the inner layer and the outer layer. A step of preparing a medical elongate body provided with a visible marker that emits light when irradiated;
a step of inserting the elongate body into a living body;
a step of irradiating the visual recognition marker with light to emit light to determine the insertion position of the medical elongated body;
have

In the training method for a medical elongated body according to the present invention for achieving the above object, the elongated body body elongated along the axial direction has an inner layer and an outer layer, and light is emitted between the inner layer and the outer layer. A step of preparing a medical elongate body provided with a visible marker that emits light when irradiated;
inserting the elongate body into a biological model;
a step of determining an insertion position of the medical elongate body by irradiating the visual recognition marker located in the biological model with light to emit light;
have

In the elongated body for medical use configured as described above, since the visible marker is provided between the inner layer and the outer layer, the visible marker is not exposed to the outside, and the degree of freedom in material and color can be increased.

A reinforcing body may be provided between the inner layer and the outer layer, and the visual recognition marker may be provided on the reinforcing body. Thereby, a visual marker can be easily provided between the inner layer and the outer layer.

The visual marker may include a luminous body that emits light when illuminated with light. As a result, the visual recognition marker can be reliably visually recognized by irradiating light to cause the visual recognition marker to emit light.

The outer layer may be translucent. Thereby, the visual recognition marker can be reliably visually recognized.

The outer layer may be colored. Thereby, the visibility of the medical elongate body can be improved.

The elongated body may have an X-ray contrast marker, and the visible marker may have a higher X-ray transmittance than the X-ray contrast marker. Thereby, it is possible to prevent the visibility marker from interfering with the position confirmation of the X-ray contrast marker during X-ray imaging.

In the visual recognition method of the elongated body for medical use configured as described above, the insertion position of the elongated body for medical use is indicated by a visual marker that is provided between the inner layer and the outer layer so as to be easily identifiable by color and shape. The operator can easily judge.

In the training method for the medical elongated body configured as described above, the insertion position of the medical elongated body is indicated by a visual marker formed between the inner layer and the outer layer so as to be easily identifiable by color and shape. Training to judge can be done effectively.

It is a front view of the catheter of this embodiment. Fig. 3 is a cross-sectional view of a catheter; FIG. 4 is a cross-sectional view of a catheter in which a luminous body is applied to the inner layer; FIG. 4 is a partial front view of a catheter with UV light applied to a visual marker. FIG. 10 is a perspective view of a catheter in which a visual marker is provided on the surface of the inner layer, and is a perspective view showing the portion of the outer layer where the visual marker is removed. FIG. 10 is a partially enlarged front view of a guidewire with visual markers; 1 is a front view of a training catheter; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the dimensional ratios in the drawings may be exaggerated for convenience of explanation and may differ from the actual ratios. Also, in this specification, the side of the catheter 10 that is inserted into a biological lumen is referred to as the "distal end" or "distal end side", and the proximal side for operation is referred to as the "proximal end" or "proximal end side".

The medical elongated body of this embodiment is a catheter 10 to be inserted into a living body. The catheter 10 has an elongated main body 20 and a hub 21 provided at the proximal end of the elongated main body 20, as shown in FIG. The distal end surface of the elongated main body 20 has a distal end opening 23 in which the lumen of the elongated main body 20 opens.

An X-ray imaging marker 43 is arranged in the vicinity of the distal end of the elongate body 20 . A visual recognition marker 40 and a visual recognition marker 41 are provided on the proximal end portion of the elongated body 20 . As the visual recognition marker 40, one strip-shaped marker that can be visually recognized by the operator is provided. The visual recognition marker 41 is located on the proximal side of the visual recognition marker 40, and is provided with two strip-shaped markers that can be visually recognized by the operator. The visual marker 40 and the visual marker 41 are arranged at different positions in the longitudinal direction of the elongated body 20 so that the operator can confirm the insertion length of the elongated body 20. These are the number of markers. can be identified by

The visible markers 40, 41 have a higher X-ray transmittance than the X-ray contrast markers. Therefore, the visible markers 40 and 41 are not imaged under X-ray imaging, and only the contrast marker 43 is imaged, so that position confirmation by the contrast marker 43 under X-ray imaging is not hindered.

As shown in FIG. 2, the elongated main body 20 has a two-layer structure consisting of an inner layer 31 having a lumen 33 penetrating from the proximal end to the distal end, and an outer layer 30 provided on the outer peripheral side of the inner layer 31. . Further, a reinforcing body 32 made of metal is provided between the inner layer 31 and the outer layer 30 . The reinforcing body 32 is made of a mesh of metal wires. In addition, the reinforcing body 32 may be formed by coiling a metal wire.

The elongated main body 20 is made of a flexible material. The outer layer 30 is made of a resin material. For example, thermoplastic elastomers such as styrene, polyolefin, polyurethane, polyester, polyamide, polybutadiene, transpolyisoprene, fluororubber, and chlorinated polyethylene can be used for the outer layer 30 . Further, the outer layer 30 is colored with a pigment or the like so that the operator can easily visually recognize the long body 20 while having translucency.

The material of inner layer 31 is desirably a material that has low friction with a guidewire inserted into lumen 33 . As a result, the guidewire inserted into the lumen 33 can be moved in the longitudinal direction with less sliding resistance, contributing to improved operability. Examples of such low-friction materials include fluorine-based resin materials such as polytetrafluoroethylene (PTFE).

Visual markers 40 , 41 are provided between the inner layer 31 and the outer layer 30 . In this embodiment, the visual recognition markers 40 and 41 are formed by being applied to the surface of the reinforcing body 32 . The visual recognition markers 40 and 41 are luminous bodies such as fluorescent paint that emit light when irradiated with ultraviolet rays. At that time, the light emitter may be applied to the surface of the inner layer 31 as shown in FIG. 3, or may be applied only to the surface of the reinforcing member 32 as shown in FIG.

The visible markers 40 and 41 may be formed by a method other than applying fluorescent paint. For example, the visual markers 40 and 41 may be formed by caulking or welding a phosphor to the reinforcing member 32 . Also, the visual markers 40 and 41 may be made of a normal pigment or the like instead of the phosphor, and the operator can visually recognize the visual markers 40 and 41 through the translucent outer layer 30 .

As shown in FIG. 4, when the elongated main body 20 is irradiated with ultraviolet rays from the UV light 50, the visual marker 41 formed between the inner layer 31 and the outer layer 30 emits light. As a result, the operator can reliably visually recognize the visual recognition marker 41 . The light that causes the visual recognition marker 41 to emit light may be a normal illumination lamp such as a fluorescent lamp or an LED lamp as long as it can be visually recognized, but preferably includes ultraviolet light.

When using the catheter 10, the operator percutaneously inserts the elongate body 20 into the biological lumen. After inserting the long body 20 of a certain length into the living body, the operator irradiates the long body 20 with the UV light 50 . By irradiation with the UV light 50, the visual recognition markers 40 and 41 emit light as described above, and the operator can grasp their positions. The operator can determine the insertion position of the elongate body 20 from the positions of the visual recognition markers 40 and 41 . Also, during X-ray imaging, the imaging marker 43 provided on the catheter 10 is imaged, and the tip position of the elongated body 20 can be confirmed.

Since the visual recognition markers 40 and 41 are provided between the inner layer 31 and the outer layer 30, it is possible to increase the degree of freedom in materials and colors. For example, in the present embodiment, the plurality of visual recognition markers 40 and 41 are identified by their numbers, but they may be identified by changing their colors, shapes, and lengths in addition to the number of markers.

The visual marker 40 may be provided on the surface of the inner layer 31 as shown in FIG. In this case, the visual marker 40 may be applied to the inner layer 31 or may be fixed by caulking or welding as described above. Also, the visual recognition marker 40 may be fixed to the inner layer 31 by a method other than these. The outer layer 30 is made of a translucent material so that the visual recognition marker 40 can be visually recognized.

The medical elongated body may be a guidewire 60 . As shown in FIG. 6 , the guide wire 60 has an elongated core 70 and a coil 71 formed by winding a wire around the core 70 . In the guidewire 60, the core material 70 is the inner layer and the coil 71 is the outer layer.

A visual recognition marker 80 is provided on the surface of the core material 70 that is the inner layer of the medical elongate body. The visual marker 80 is formed by applying a phosphor to the surface of the core material 70 . However, the visible marker 80 may be formed by caulking or welding a visible member to the surface of the core material 70 . A plurality of visual recognition markers 80 are provided in the longitudinal direction of the guide wire 60 in which one or more of the number, color, shape, and length are different. The operator can determine the insertion position of the guide wire 60 from the position of the visual recognition marker 80 .

A medical elongated body having visual markers can also be used for operator training. Training is performed, for example, by inserting a medical elongate body into a transparent biological model imitating a biological lumen. In this case, the long body for medical use inserted into the biological model can be visually recognized from the hand portion to the distal end portion. As shown in FIG. 7, a catheter 100 which is a medical elongated body used for training has visual markers 102 and 103 at a proximal portion of a long body main body 101 . A visual recognition marker 104 is also provided at the distal end of the elongated main body 101 . These visual markers 102 , 103 , 104 are all formed by providing phosphors that emit light when irradiated with ultraviolet rays between the inner layer and the outer layer of the long body 101 .

When performing training, the elongated body 101 is inserted into the biological model, and when the elongated body 101 is inserted to a certain position, the elongated body 101 is irradiated with ultraviolet rays, and the visual marker 102 on the hand side is used. , 103 are illuminated to determine the insertion position of the elongate body 101 . In addition, the visual marker 104 provided at the tip of the elongated main body 101 is irradiated with ultraviolet rays to emit light, and the position of the tip of the elongated main body 101 in the living body model can be visually recognized. . This enables effective training of the medical elongate body.

As described above, the catheter 10 according to the present embodiment has the long main body 20 elongated along the axial direction. The long main body 20 has the inner layer 31 and the outer layer 30. A visual marker 40 is provided between the outer layer 30 and the outer layer 30 . In the catheter 10 configured in this manner, the visual marker 40 is provided between the inner layer and the outer layer, so that the visual marker 40 is not exposed to the outside, and the material and color can be made more flexible.

The visual recognition method of the catheter 10 according to the present embodiment is as follows. a step of inserting the long body 10 into the living body; and a step of irradiating the visual marker 40 with light to emit light, thereby determining the insertion position of the catheter 10. and; The method of visualizing the catheter 10 configured in this manner is such that the operator can easily determine the insertion position of the catheter 10 by means of the visual marker 40 which is provided between the inner layer 31 and the outer layer 30 and is easily identifiable by color and shape. can be judged.

In the training method for the catheter 100 according to the present embodiment, the elongate body 101 elongated along the axial direction has an inner layer 31 and an outer layer 30, and light is emitted between the inner layer 31 and the outer layer 30 by irradiation of light. a step of preparing a catheter 100 provided with a visual marker 104 to be used; a step of inserting a long body main body 101 into a biological model; and determining the insertion position of the catheter 100 . The training method for the catheter 100 configured in this manner is training for judging the insertion position of the catheter 100 by means of the visual markers 104 which are provided between the inner layer 31 and the outer layer 30 so as to be easily identifiable by color and shape. can be done effectively.

A reinforcing body 32 may be provided between the inner layer 31 and the outer layer 30 , and the visual recognition marker 40 may be provided on the reinforcing body 32 . Thereby, the visual marker 30 can be easily provided between the inner layer 31 and the outer layer 30 .

The visual marker 40 may include a luminous body that emits light when illuminated with light. As a result, the visual recognition marker 40 can be reliably visually recognized by irradiating light to cause the visual recognition marker 40 to emit light.

The outer layer 30 may be translucent. Thereby, the visual recognition marker 40 can be reliably visually recognized.

The outer layer 30 may be colored. Thereby, the visibility of the catheter 10 can be improved.

The elongated body 20 has an X-ray contrast marker 43 , and the visible marker 40 may have a higher X-ray transmittance than the X-ray contrast marker 43 . Thereby, it is possible to prevent the visual recognition marker 40 from interfering with the confirmation of the position of the X-ray contrast marker 43 during X-ray imaging.

The present invention is not limited to the above-described embodiments, and various modifications can be made by those skilled in the art within the technical concept of the present invention. In the above-described embodiment, the elongated body 20 is manually inserted into the living body, but in a robotic catheter system, it may be automatically inserted into the living body by a robot. In this case, by providing visual recognition markers 40 and 41 on the elongated body 20, the robot can recognize them and determine the insertion position of the elongated body 20. FIG.

REFERENCE SIGNS LIST 10 catheter 20 elongated body 21 hub 23 tip opening 30 outer layer 31 inner layer 32 reinforcement 33 lumen 40 visual marker 41 visual marker 43 contrast marker 45 visual marker 50 UV light 60 guide wire 70 core 71 coil 80 visual marker 100 Catheter 101 Long Body Main Body 102 Visual Marker 103 Visual Marker 104 Visual Marker

Claims (9)

having a long main body elongated along the axial direction,
The elongated main body has an inner layer and an outer layer,
A medical elongate body having a visual marker provided between the inner layer and the outer layer. A reinforcing body is provided between the inner layer and the outer layer,
The medical elongate body according to claim 1, wherein the reinforcing body is provided with the visual recognition marker. The elongated body for medical use according to claim 1 or 2, wherein the visual recognition marker includes a luminous body that emits light when irradiated with light. 4. The long medical body according to any one of claims 1 to 3, wherein the outer layer has translucency. The medical elongate body according to claim 4, wherein the outer layer is colored. The elongated body has an X-ray contrast marker,
The elongated body for medical use according to any one of claims 1 to 5, wherein the visible marker has a higher X-ray transmittance than the X-ray contrast marker. The medical elongate body according to any one of claims 1 to 6, wherein the medical elongate body is a catheter. A step of preparing a medical elongated body in which a elongated body elongated along an axial direction has an inner layer and an outer layer, and a visible marker that emits light when irradiated with light is provided between the inner layer and the outer layer. When,
a step of inserting the elongate body into a living body;
a step of irradiating the visual recognition marker with light to emit light to determine the insertion position of the medical elongated body;
A method for visually recognizing a medical elongate body. A step of preparing a medical elongated body in which a elongated body elongated along an axial direction has an inner layer and an outer layer, and a visible marker that emits light when irradiated with light is provided between the inner layer and the outer layer. When,
inserting the elongate body into a biological model;
a step of determining an insertion position of the medical elongate body by irradiating the visual recognition marker located in the biological model with light to emit light;
A training method for a long body for medical use.

Images