Hook for medical device and medical device

Abstract

To hold a tubular part of a medical device in a suspended state.SOLUTION: A hook for medical devices to be attached to a medical device with a tubular part to be inserted into a body cavity, the hook includes an insertion port into which the tubular part can be inserted, formed thereon. A peripheral part of the insertion port is elastically deformed so as to come into close contact with the tubular part inserted into the insertion port, so that the hook part holds the tubular part by friction resistance generated at a close contact part between the peripheral part of the insertion port and the tubular part.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a hook for medical devices and a medical device.

Background Art

[0002] Medical devices having a tubular portion to be inserted into a body cavity are known. For example, Patent Document 1 describes a specific configuration of this type of medical device.

[0003] In the medical device described in Patent Document 1, a hook is attached to the base end portion of an operating body operated by an operator (doctor). When the medical device is suspended by hanging the hook on a hanger and the tubular portion lies horizontally on the floor surface, it is not preferable in terms of hygiene, and there is also a risk that, for example, the operator may step on the tubular portion with a foot and damage it.

[0004] Therefore, in the medical device described in Patent Document 1, a locking groove for locking the tubular portion is formed in the operating body. By hanging the tubular portion in this locking groove and suspending the tubular portion, it becomes unnecessary to lay the tubular portion horizontally on the floor surface.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In Patent Document 1, when the self-weight of the tubular portion is large, a large load is applied to the tubular portion at the contact portion with the locking groove, so there is a risk that the tubular portion may buckle. Further, in Patent Document 1, when the self-weight of the tubular portion is small, the engagement condition in the locking groove is weak, so there is a risk that the tubular portion may fall off from the locking groove.

[0007] The present invention has been made in consideration of the above circumstances, and its object is to provide a medical device hook suitable for holding a tubular portion of a medical device in a suspended state, and a medical device equipped with such a medical device hook. [Means for solving the problem]

[0008] A hook for medical devices according to one embodiment of the present invention is a hook that is attached to a medical device that has a tubular portion that is inserted into a body cavity, and is formed with an insertion port into which the tubular portion can be inserted. The portion surrounding the insertion port elastically deforms to come into close contact with the tubular portion inserted into the insertion port, and the tubular portion is held in place by the frictional resistance that occurs at the close contact between the portion surrounding the insertion port and the tubular portion.

[0009] A medical device hook according to one embodiment of the present invention may be configured such that, when hung on a hanger, the portion surrounding the socket elastically deforms due to the weight of the medical device, coming into close contact with the tubular portion inserted into the socket, and holding the tubular portion in place by the frictional resistance generated at the close contact portion.

[0010] A hook for a medical device according to one embodiment of the present invention may be configured such that, when the tubular portion is inserted into the insertion port, the portion surrounding the insertion port elastically deforms and comes into close contact with the tubular portion, and the frictional resistance generated in the close contact portion holds the tubular portion in place.

[0011] In the medical device hook according to one embodiment of the present invention, the insertion port may include a hole or a slit.

[0012] In a hook for a medical device according to one embodiment of the present invention, the insertion port includes, for example, a hole whose diameter is larger than the outer diameter of the tubular portion.

[0013] In the hook for a medical device according to one embodiment of the present invention, the insertion port includes, for example, a slit whose width is narrower than the outer diameter of the tubular portion.

[0014] A hook for a medical device according to one embodiment of the present invention is formed from, for example, an elastomer resin.

[0015] A medical device according to an embodiment of the present invention includes a tubular portion to be inserted into a body cavity, a gripping portion connected to the proximal end portion of the tubular portion, and the hook for the medical device attached to the proximal end portion of the gripping portion.

[0016] In the medical device according to an embodiment of the present invention, the hook for the medical device is attached to the gripping portion so as to be in a posture inclined obliquely with respect to the gravitational direction when, for example, it is hung on a hanger.

Advantages of the Invention

[0017] According to an embodiment of the present invention, there are provided a hook for a medical device suitable for holding the tubular portion of the medical device in a suspended state and a medical device including such a hook for a medical device.

Brief Description of the Drawings

[0018] [Figure 1] It is an overall view of an endoscopic treatment instrument to which a hook according to Example 1 of the present invention is attached. [Diagram 2] In Example 1 of the present invention, it is a view showing a state in which the endoscopic treatment instrument is suspended by hanging the hook on a hanger. [Figure 3] It is a view in the direction of the arrow of the hook according to Example 1 of the present invention. [Figure 4A] In Example 1 of the present invention, it is a view showing a state in which the tubular distal end portion of the endoscopic treatment instrument is inserted into the insertion hole of the hook. [Figure 4B] In Example 1 of the present invention, it is a view showing the state of the insertion hole when the hook is hung on a hanger. [Figure 5] It is a view in the direction of the arrow of the hook according to Example 2 of the present invention. [Figure 6A] In Example 2 of the present invention, it is a view showing a state in which the tubular distal end portion of the endoscopic treatment instrument is inserted into the slit of the hook. [Figure 6B] In Example 2 of the present invention, it is a view showing a state in which the tubular distal end portion of the endoscopic treatment instrument is inserted into the slit of the hook. [Figure 7]FIG. 10 is an arrow view of a hook according to a third embodiment of the present invention. [Figure 8A] FIG. 10 is a view showing how the tubular tip of the endoscopic treatment tool is inserted into the slit of the hook in the third embodiment of the present invention. [Figure 8B] FIG. 10 is a view showing how the tubular tip of the endoscopic treatment tool is inserted into the slit of the hook in the third embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, a medical device hook and a medical device according to an embodiment of the present invention will be described with reference to the drawings.

[0020] The medical device hook according to this embodiment is attached to a medical device having a tubular portion to be inserted into a body cavity. As an example, the medical device hook is attached to an endoscopic treatment tool having a high-frequency knife that applies high-frequency current to excise mucous membranes and the like in endoscopic submucosal dissection (ESD).

[0021] The medical device to which the medical device hook according to this embodiment can be attached is not limited to an endoscopic treatment tool, and the medical device hook may be attached to other types of medical devices (e.g., endoscopes) that have a tubular portion that can be inserted into a body cavity.

[0022] [Example 1] 1 is an overall view of an endoscopic treatment tool 2 to which a hook 1 according to a first embodiment of the present invention is attached. The hook 1 is an example of a hook for a medical device.

[0023] In addition to the hook 1, the endoscopic treatment tool 2 includes a tubular portion 2A and a grip portion 2B.

[0024] The tubular portion 2A is a portion that is inserted into the body cavity (more precisely, it is inserted into the body cavity while being passed through the channel of the endoscope), and has flexibility so that it can deform following the organs in the body cavity. A high-frequency knife is provided inside the tip portion 2Aa of the tubular portion 2A (hereinafter referred to as "tubular tip portion 2Aa").

[0025] The gripping portion 2B is a portion that is gripped by the operator, and is connected to the proximal end portion of the tubular portion 2A. An operation portion 2Ba that is operated by the operator is provided on the gripping portion 2B.

[0026] In response to the operation of the operation portion 2Ba by the operator, the protruding amount of the high-frequency knife with respect to the tip surface of the tubular tip portion 2Aa changes. The operator operates the operation portion 2Ba according to the content of the procedure (marking, local injection, incision, dissection, hemostasis, etc.), and protrudes the high-frequency knife from the tip surface of the tubular tip portion 2Aa by an appropriate amount.

[0027] FIG. 2 is a view showing a state in which the hook 1 is hung on the hanger 3 and the endoscopic treatment instrument 2 is suspended. FIG. 3 is a cross-sectional view of the hook 1 hung on the hanger 3 as viewed from the direction of arrow A in FIG. 2.

[0028] In the following description, the vertical direction is the Z direction, and the two directions orthogonal to the Z direction and orthogonal to each other are the X direction and the Y direction. The X direction, the Y direction, and the Z direction that are orthogonal to each other form a left-handed system. The positive side of the Z direction is the direction of gravity.

[0029] The hook 1 is a resin molded product in which the main body portion 110 and the connecting portion 120 are integrally formed. The hook 1 is formed of an elastomer resin such as silicone rubber or fluororubber. Therefore, the hook 1 elastically deforms according to the applied load.

[0030] The main body portion 110 is formed in an annular shape and has a hole 112. The hanger 3 is hung on the hole 112.

[0031] The connecting portion 120 connects the main body portion 110 and the gripping portion 2B. Specifically, the connecting portion 120 has a wide and flat plate shape in the lateral direction (Y direction in FIG. 3), the tip (negative Z direction in FIG. 3) is integrated with the main body portion 110, and the proximal end portion (positive Z direction in FIG. 3) is embedded in the proximal end portion 2Bb of the gripping portion 2B.

[0032] At the center in the width direction of the connecting portion 120 (center in the Y direction in FIG. 3) and at a position below the hole 112 when the hook 1 is hung on the hanger 3, an insertion hole 122, which is an example of an insertion port, is formed. The insertion hole 122 is a circular hole with a diameter larger than the outer diameter of the tubular tip portion 2Aa of the endoscopic treatment instrument 2 (see FIG. 4A described later). That is, the insertion hole 122 is formed to allow the insertion of the tubular tip portion 2Aa.

[0033] Note that the insertion hole 122 is not limited to a circular hole and may be a hole of other shapes (for example, an elliptical shape, a polygonal shape, etc.).

[0034] For convenience, the portion around the insertion hole 122 is referred to as the "surrounding portion 124".

[0035] The operator or other medical staff (physician assistant, nurse, etc.) hangs the hook 1 on the hanger 3 provided on the indoor wall surface to suspend the endoscopic treatment instrument 2. Hereinafter, the person who performs the operation of suspending the endoscopic treatment instrument 2 is collectively referred to as the operator.

[0036] The operator inserts the tubular tip portion 2Aa into the insertion hole 122 and then hangs the hook 1 on the hanger 3.

[0037] FIG. 4A is a view showing a state where the tubular tip portion 2Aa is inserted into the insertion hole 122. As shown in FIG. 4A, since the diameter of the insertion hole 122 is larger than the outer diameter of the tubular tip portion 2Aa, the operator can easily insert the tubular tip portion 2Aa into the insertion hole 122.

[0038] 4B is a diagram showing the state of the insertion hole 122 when the hook 1 is hung on the hanger 3. When the hook 1 is hung on the hanger 3, almost the entire hook 1, including the surrounding portion 124 of the insertion hole 122, is elastically deformed, albeit slightly, so as to stretch in the Z direction due to the weight of the endoscopic treatment tool 2.

[0039] As the surrounding portion 124 elastically deforms, the insertion hole 122 deforms from a circular shape to an elliptical hole with its major axis in the Z direction and its minor axis in the Y direction, as shown in FIG. 4B. A portion of the surrounding portion 124 that has elastically deformed to narrow the insertion hole 122 in the Y direction comes into close contact with the tubular tip portion 2Aa inserted into the insertion hole 122. Because the surrounding portion 124 and the tubular tip portion 2Aa come into close contact with each other, sufficient frictional resistance is generated between them. Therefore, the tubular tip portion 2Aa does not fall out of the insertion hole 122 and is firmly held by the surrounding portion 124.

[0040] In this way, the hook 1 is configured so that the weight of the suspended endoscopic treatment tool 2 is utilized to elastically deform the surrounding portion 124 of the insertion hole 122. The elastic deformation of the surrounding portion 124 causes the surrounding portion 124 to come into close contact with the tubular tip portion 2Aa inserted into the insertion hole 122, and the tubular tip portion 2Aa is held in place by frictional resistance generated at the close contact portion between the surrounding portion 124 and the tubular tip portion 2Aa.

[0041] Even when the weight of the endoscopic treatment tool 2 is large, the surrounding portion 124 and the tubular tip portion 2Aa are in close contact with each other, so the load acting on the tubular tip portion 2Aa is dispersed more effectively than in the configuration described in Patent Document 1. This reduces the likelihood of buckling of the tubular tip portion 2Aa. Furthermore, even when the weight of the endoscopic treatment tool 2 is small, the surrounding portion 124 and the tubular tip portion 2Aa are in close contact with each other and the hook 1 is made of an elastomer resin with a large coefficient of static friction, so sufficient frictional resistance is generated between them. This reduces the likelihood of the tubular tip portion 2Aa falling off from the insertion hole 122.

[0042] 2, the hook 1 is attached to the base end 2Bb of the gripping portion 2B so as to be inclined obliquely with respect to the direction of gravity (positive side of the Z direction) when hung on the hanger 3. Therefore, the hook 1 does not actually elastically deform so as to extend only in the Z direction, but rather elastically deforms so as to extend in the direction of arrow C, which is a combination of the positive side of the Z direction and the positive side of the X direction, due to the weight of the endoscopic treatment tool 2.

[0043] Because the surrounding portion 124 elastically deforms so as to bend, loads are applied in various directions to the tubular tip portion 2Aa from the surrounding portion 124 at the contact area between the surrounding portion 124 and the tubular tip portion 2Aa. This also makes it difficult for the tubular tip portion 2Aa to fall off from the insertion hole 122.

[0044] [Example 2] Fig. 5 is a view showing a hook 201 according to a second embodiment of the present invention. Note that the hooks according to the following embodiments, including the second embodiment, are attached to the endoscopic treatment tool 2 in the same manner as in the first embodiment. Fig. 5 is an arrow view similar to Fig. 3, showing the hook 201 hung on the hanger 3.

[0045] The hook 201, like the hook 1 according to the first embodiment, is a resin molded product in which a main body 210 and a connecting portion 220 are integrally formed, and is elastically deformed in response to an applied load.

[0046] The main body 210 is formed in an annular shape and has a hole 212, similar to the main body 110 according to the first embodiment.

[0047] Similar to the connecting portion 120 in Example 1, the connecting portion 220 is a flat plate that is wide in the horizontal direction, with its tip being integral with the main body portion 210 and its base end being embedded in the base end portion 2Bb of the gripping portion 2B.

[0048] The hook 201 is formed with a protruding portion 226 that protrudes from the side of the connecting portion 220 near the boundary between the main body portion 210 and the connecting portion 220. The protruding portion 226 is formed to extend along the outer peripheral surface 210A of the main body portion 210. In the second embodiment, a slit 222, which is an example of an insertion port, is formed between the outer peripheral surface 210A of the main body portion 210 and the protruding portion 226.

[0049] The slit 222 includes a linear slit portion (linear portion 222a) and a circular slit portion (circular portion 222b). The width of the linear portion 222a is narrower than the outer diameter of the tubular tip portion 2Aa, and the diameter of the circular portion 222b is smaller than the outer diameter of the tubular tip portion 2Aa. For convenience, the portion surrounding the circular portion 222b will be referred to as the "peripheral portion 224."

[0050] The hook 201 elastically deforms in response to the applied load, allowing the operator to easily insert the tubular tip portion 2Aa into the slit 222.

[0051] 6A and 6B are diagrams showing how the tubular tip portion 2Aa is inserted into the slit 222. As shown in Fig. 6A, when the tubular tip portion 2Aa is inserted into the straight portion 222a of the slit 222, the protruding portion 226 is pushed and moved in the direction of arrow D, and the straight portion 222a expands. As shown in Fig. 6B, when the tubular tip portion 2Aa is inserted up to the circular portion 222b of the slit 222, the load on the protruding portion 226 by the tubular tip portion 2Aa is almost eliminated, so the protruding portion 226 moves in the direction of arrow E, and the straight portion 222a returns to almost its original width.

[0052] The diameter of the circular portion 222b is smaller than the outer diameter of the tubular tip portion 2Aa, so that the peripheral portion 224 of the circular portion 222b elastically deforms so as to expand to fit the outer diameter of the tubular tip portion 2Aa.

[0053] The peripheral portion 224 is in close contact with the tubular tip portion 2Aa inserted into the circular portion 222b as the above-described elastic deformation occurs. Since the peripheral portion 224 and the tubular tip portion 2Aa are in close contact with each other, sufficient frictional resistance is generated between them. Therefore, the tubular tip portion 2Aa does not fall off from the circular portion 222b and is firmly held by the peripheral portion 224.

[0054] Also, the width of the straight portion 222a is even narrower than the diameter of the circular portion 222b. Therefore, even when the tubular tip portion 2Aa comes off from the circular portion 222b, it is difficult for the tubular tip portion 2Aa to fall off through the straight portion 222a.

[0055] As described above, the hook 201 is configured such that the peripheral portion 224 elastically deforms following the tubular tip portion 2Aa inserted into the slit 222. Due to the elastic deformation of the peripheral portion 224, the peripheral portion 224 and the tubular tip portion 2Aa are in close contact with each other, and the tubular tip portion 2Aa is held by the frictional resistance generated at the contact portion between the peripheral portion 224 and the tubular tip portion 2Aa.

[0056] Also in the second embodiment, even when the weight of the endoscopic treatment instrument 2 is large, since the peripheral portion 224 and the tubular tip portion 2Aa are in close contact with each other on the surface, the load applied to the tubular tip portion 2Aa is dispersed as compared with the configuration described in Patent Document 1. Therefore, buckling of the tubular tip portion 2Aa is less likely to occur. Also, even when the weight of the endoscopic treatment instrument 2 is small, since the peripheral portion 224 and the tubular tip portion 2Aa are in close contact with each other on the surface, and since the hook 201 is made of an elastomer resin having a large coefficient of static friction, sufficient frictional resistance is generated between them. Therefore, it is difficult for the tubular tip portion 2Aa to fall off from the slit 222.

[0057] [Embodiment 3] FIG. 7 is a diagram showing a hook 301 according to Embodiment 3 of the present invention. FIG. 7 is a view in the same arrow direction as FIG. 3 and shows the hook 301 hung on the hanger 3.

[0058] The hook 301 is a resin molded product in which the main body portion 310 and the connecting portion 320 are integrally formed, similar to the hook 1 according to Embodiment 1, and elastically deforms according to the applied load.

[0059] The main body 310 is formed in an annular shape and has a hole 312, similar to the main body 110 according to the first embodiment.

[0060] Similar to the connecting portion 120 in Example 1, the connecting portion 320 is a flat plate that is wide in the horizontal direction, with its tip being integral with the main body portion 310 and its base end being embedded in the base end portion 2Bb of the gripping portion 2B.

[0061] In the main body 310, a slit 322 is formed below the hole 312 (more precisely, at a position that is below the hole 312 when the hook 301 is hung on the hanger 3).

[0062] The slit 322 includes a linear slit portion (linear portion 322a) and a circular slit portion (circular portion 322b). The linear portion 322a is formed to extend in the vertical direction (Z direction in FIG. 7), with its tip (negative side of the Z direction in FIG. 7) connected to the hole 312 and its base end (positive side of the Z direction in FIG. 7) connected to the circular portion 322b.

[0063] The width of the straight portion 322a is narrower than the outer diameter of the tubular tip portion 2Aa, and the diameter of the circular portion 322b is greater than the outer diameter of the tubular tip portion 2Aa. For convenience, the portion surrounding the slit 322 will be referred to as a "surrounding portion 324."

[0064] The hook 301 elastically deforms in response to the applied load, allowing the operator to easily insert the tubular tip portion 2Aa into the slit 322.

[0065] 8A and 8B are diagrams showing how the tubular tip portion 2Aa is inserted into the slit 322. As shown in Fig. 8A, when the tubular tip portion 2Aa is inserted into the straight portion 322a of the slit 322, the peripheral portion 324 that defines the straight portion 322a is expanded in the Y direction, as shown by arrows F1 and F2. As shown in Fig. 8B, when the tubular tip portion 2Aa is inserted up to the circular portion 322b of the slit 322, the peripheral portion 324 that defines the straight portion 322a returns to its original shape, as shown by arrows G1 and G2.

[0066] In the third embodiment, the entire hook 301 is elastically deformed so as to extend in the Z direction due to the weight of the endoscopic treatment tool 2, and the linear portion 322a and the circular portion 322b are deformed accordingly. Specifically, due to the elastic deformation of the peripheral portion 324, the linear portion 322a is deformed so as to extend in the Z direction and narrow in the Y direction at the same time, and the circular portion 322b is deformed into an elliptical shape, similar to the insertion hole 122 in the first embodiment.

[0067] Because the width of the straight portion 322a is narrowed, even if the tubular tip portion 2Aa comes off the circular portion 322b, it is unlikely to fall off through the straight portion 322a. In addition, because the circular portion 322b is deformed into an ellipse, the tubular tip portion 2Aa and the peripheral portion 324 are closely attached to each other. Therefore, the tubular tip portion 2Aa is unlikely to fall off from the slit 322.

[0068] The diameter of the circular portion 322b may be smaller than the outer diameter of the tubular tip portion 2Aa. In this case, when the tubular tip portion 2Aa is inserted into the circular portion 322b, the surrounding portion 324 elastically deforms so that the circular portion 322b expands to fit the outer diameter of the tubular tip portion 2Aa.

[0069] As a result of the elastic deformation, the surrounding portion 324 comes into close contact with the tubular tip portion 2Aa inserted into the circular portion 322b. As described above, a load from the surrounding portion 324 that tends to deform the circular portion 322b into an elliptical shape is further applied to the tubular tip portion 2Aa. Therefore, in Example 3, the tubular tip portion 2Aa is held even more firmly.

[0070] The above is a description of exemplary embodiments of the present invention. The embodiments of the present invention are not limited to those described above, and various modifications are possible within the scope of the technical concept of the present invention. For example, the embodiments of the present invention also include appropriate combinations of embodiments explicitly shown as examples in the specification or obvious embodiments. [Explanation of symbols]

[0071] 1: Hook 2: Endoscopic treatment tools 2A: Tubular part 2Aa: Tubular tip 2B: Grip 3:ハンガ 110: Main body part 112: Hole 120: Connection 122: Difference hole 124: Zhou En part

Claims

1. A hook for a medical device that is attached to a medical device having a tubular portion that is inserted into a body cavity, An insertion port into which the tubular portion can be inserted is formed, When the medical device is hung on the hanger, the surrounding portion of the insertion port is elastically deformed by the weight of the medical device, and comes into close contact with the tubular portion inserted into the insertion port, and the tubular portion is held by frictional resistance generated at the close contact portion between the surrounding portion of the insertion port and the tubular portion. Hooks for medical equipment.

2. The receptacle includes a hole or a slit. The hook for a medical device according to claim 1.

3. the receptacle includes a hole having a diameter greater than an outer diameter of the tubular portion; The hook for a medical device according to claim 1.

4. The insertion port includes a slit having a width smaller than the outer diameter of the tubular portion. The hook for a medical device according to claim 1.

5. Made of elastomer resin, The hook for a medical device according to any one of claims 1 to 4.

6. a tubular portion to be inserted into a body cavity; a grip portion connected to a proximal end of the tubular portion; and the medical device hook according to any one of claims 1 to 4 attached to a base end of the gripping portion. Medical equipment.

7. The medical device hook is attached to the gripping portion so as to be inclined obliquely with respect to the direction of gravity when hung on the hanger. The medical device according to claim 6.

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