Medical smoke exhaust tool

Abstract

To provide a medical smoke exhaust tool which can prevent surely, positional deviation of an incision device, with a simple and compact structure, and can perform stably, incision therapeutic operation.SOLUTION: There is provided a medical smoke exhaust tool 10 which is fitted over an axial direction of a sheath 4 of an incision device 1, and can suck smoke generated due to incision therapeutic operation. The medical smoke exhaust tool has: a long cylindrical main body part 11 which is fitted to the sheath 4; a first lumen 21 into which the sheath 4 can be inserted in the main body 11; and a second lumen 22 which can suck smoke in the main body part 11. The main body part 11 has on its base end side, a fixing part 30 which can be fixed to the sheath 4.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a medical smoke evacuation device that is attached along the axial direction of a sheath of an incision device used in an incision procedure and is capable of aspirating smoke generated by the incision procedure. [Background technology]

[0002] Conventionally, in endoscopic surgery in the medical field, when biological tissue is incised using an incision device such as an electric scalpel, smoke (surgical smoke) is generated from the biological tissue. This smoke causes poor visibility of the endoscope and causes contamination of the lens, so various proposals have been made to remove the smoke.

[0003] For example, Patent Document 1 discloses a smoke removal system in which a control unit controls an insufflation device to remove smoke when a smoke generation determination circuit detects smoke generated in the abdominal cavity based on an endoscopic image captured by a TV camera. Here, the insufflation device supplies air gas to inflate the abdominal cavity to ensure a field of view and a treatment area, and expels smoke generated in the abdominal cavity to the outside of the body.

[0004] In this smoke removal system, a cauterizing electrode is provided protruding from the tip of a high-frequency treatment tool, which is an incision device, and a suction port for sucking in smoke is formed inside the high-frequency treatment tool, and an electric wire or the like connected to the cauterizing electrode is arranged. In other words, the high-frequency treatment tool in the smoke removal system disclosed in Patent Document 1 is provided with an inner cavity through which an electric cord or the like for incising an affected area with high frequency is inserted, and a suction port for sucking in smoke. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 11-318909 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the conventional technology described in the above-mentioned Patent Document 1, since the smoke generated by the incision of the biological tissue by the incision device can be sucked in, the surgeon can make the incision while being able to observe the affected area well, but there is a problem that the incision device may shift position during the procedure, making it impossible to perform the incision procedure stably. Also, the overall configuration is complex and large-scale.

[0007] The present invention has been made in response to the problems associated with the conventional technology described above, and aims to provide a medical smoke evacuation device that has a simple and compact configuration, is capable of reliably preventing displacement of the incision device, and enables incision procedures to be performed stably. [Means for solving the problem]

[0008] In order to achieve the above object, one aspect of the present invention is to A medical smoke exhaust device that is attached to the axial direction of a sheath of an incision device used in an incision procedure and is capable of sucking in smoke generated by the incision procedure, a main body portion formed in a long cylindrical shape and attached to an outer periphery of the sheath; a first inner cavity extending in an axial direction inside the main body and through which the sheath can be inserted; A second lumen extending axially inside the body portion and capable of drawing in smoke, The main body is characterized in that a fixing portion capable of being fixed to the sheath is provided on the base end side of the main body. Effect of the Invention

[0009] According to the medical smoke evacuator of the present invention, with its simple and compact configuration, it is possible to reliably prevent displacement of the incision device, thereby enabling incision treatment to be performed stably. [Brief description of the drawings]

[0010] [Figure 1]1 is a front view showing a state in which a medical smoke evacuator according to an embodiment of the present invention is attached to an electric scalpel. FIG. [Diagram 2] FIG. 1 is a front view showing a medical smoke evacuator according to an embodiment of the present invention. [Diagram 3] 1A is a perspective view and FIG. 1B is a front view showing a case in which the tip side of the main body according to an embodiment of the present invention is not cut and the tip surface is a flat surface perpendicular to the axis. [Figure 4] 1A is a perspective view and FIG. 1B is a front view showing a state where a portion of the tip side of a main body portion according to an embodiment of the present invention where a second lumen opens is cut in an oblique direction intersecting an axis at an acute angle. [Diagram 5] 3A to 3C are explanatory views illustrating cross-sectional shapes of a first inner cavity and a second inner cavity in a main body portion according to an embodiment of the present invention. [Figure 6] 1A is a front view, FIG. 1B is a bottom view, FIG. 1C is an enlarged left side view, and FIG. 1D is an enlarged right side view showing the overall configuration of a medical smoke evacuator according to an embodiment of the present invention. [Figure 7] 1A is a plan view showing the overall configuration of a medical smoke evacuator according to an embodiment of the present invention, FIG. 1B is a cross-sectional view taken along line BB, and FIG. 1C is an enlarged cross-sectional view of a fixing portion. [Figure 8] FIG. 2 is an exploded perspective view showing a fixing portion according to an embodiment of the present invention. [Figure 9] FIG. 4 is a front view showing a fixing portion according to the embodiment of the present invention. [Figure 10] FIG. 4 is a rear view showing the fixing portion according to the embodiment of the present invention. [Figure 11] 11 is a left side view showing a state in which each clamping piece of the fixing part according to the embodiment of the present invention is open. [Figure 12] 11 is a left side view showing a state in which each clamping piece of the fixing part according to the embodiment of the present invention is closed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, a representative embodiment of the present invention will be described with reference to the drawings. The medical smoke evacuation device 10 according to this embodiment is attached to the axial direction of the sheath of an incision device used in an incision procedure, and is capable of sucking in smoke generated by the incision procedure. Note that the components, shapes, values, etc. shown in the embodiment described below are examples of the present invention and do not limit the present invention.

[0012] <Incision device (electric scalpel 1)> In general, an incision device has a cutting section that emits high energy for incision protruding from the distal end side of a sheath, and uses the energy for incision to incise biological tissue and also coagulate (stop bleeding) the incised affected area. Specific examples of incision devices include electric scalpels, ultrasonic scalpels, laser scalpels, and high-frequency cauterization devices. Hereinafter, an example of the medical smoke evacuation device 10 according to this embodiment applied to an electric scalpel 1 as an example of an incision device will be described.

[0013] As shown in Fig. 1, the electric scalpel 1 of this embodiment is configured in the shape of forceps, and a sheath 4 extending in the axial direction is attached via a nut 3 to the tip side of an operating handle 2. The handle 2 is made up of a pair of round and flat handles 2a and 2b that are opened and closed by inserting fingers. The sheath 4 is a thin tube-shaped member through which a jaw insert 5 is inserted, and is the main part on which the medical smoke evacuator 10 is attached. The base end side of the jaw insert 5 is attached integrally to the handle 2 side through the nut 3.

[0014] The incision portion 6 on the tip side of the jaw insert 5 protrudes from the tip opening of the sheath 4. The incision portion 6 is composed of a pair of scalpel tip electrodes 6a, 6b, and can be opened and closed by operating the handle 2 via an opening and closing mechanism (not shown) to incise the affected area while grasping it. In this embodiment, a bipolar electric scalpel 1 having a pair of scalpel tip electrodes 6a, 6b is used as an example of an incision device, but a monopolar electric scalpel having one scalpel tip electrode 6a, 6b may also be used.

[0015] <Overview of 10 medical smoke exhaust devices> As shown in Figures 1 and 2, the medical smoke evacuator 10 has a main body 11 formed in a long cylindrical shape to be attached to the outer periphery of the sheath 4 of the electric scalpel 1, a first lumen 21 (see Figure 4(a)) extending axially inside the main body 11 and through which the sheath 4 can be inserted, and a second lumen 22 (see Figure 4(a)) extending axially inside the main body 11 and through which smoke can be sucked. The medical smoke evacuator 10 is characterized in that a fixing part 30 that can be fixed to the sheath 4 is provided on the base end side of the main body 11. The medical smoke evacuator 10 can also be configured as a single unit by combining it with the electric scalpel 1 in advance.

[0016] <Main body 11> As shown in Figures 1 and 2, the main body 11 is integrally formed in a long and thin cylindrical shape from a relatively hard resin such as polyvinyl chloride (PVC). The main body 11 has a length that allows it to be attached to the outer periphery of the sheath 4 of the electric scalpel 1 from the base end side to the tip end side. Here, the incision part 6 of the jaw insert 5 on the tip side of the sheath 4 of the electric scalpel 1 protrudes from the tip of the main body 11. Meanwhile, the base end of the main body 11 is disposed inside the fixing part 30 that fixes it to the base end side of the sheath 4 of the electric scalpel 1.

[0017] Inside the main body 11, a first lumen 21 and a second lumen 22 are formed as lumens extending in the axial direction as independent ducts. For example, when used with an electric scalpel 1 having an outer diameter of a sheath 4 of 5 mm, the outer diameter of the main body 11 is set to 10 mm, which is twice the outer diameter of the sheath 4, since not only the first lumen 21 but also the second lumen 22 are provided inside the main body 11. The outer diameter of the main body 11 is set to the same thickness from the distal tip to the proximal end. Such a main body 11 can be formed, for example, by a 3D printer.

[0018] <<Cutting the tip side of the main body 11>> 3(a) and 3(b) are a perspective view and a front view in the case where the distal end side of the main body 11 is not cut and the distal end surface is a plane perpendicular to the axis (no cut). Meanwhile, FIG. 4(a) and FIG. 4(b) are a perspective view and a front view in the case where the part of the distal end side of the main body 11 where the second lumen 22 opens is cut in an oblique direction intersecting the axis at an acute angle (cut). In FIG. 3 and FIG. 4, the symbols "B" and "T" respectively indicate the base end side and the distal end side of the main body 11. Also, in FIG. 4, the symbol "CT" indicates that the distal end opening of the second lumen 22 in the main body 11 is cut.

[0019] The main body 11 of the medical smoke evacuator 10 according to this embodiment employs the "cut" design shown in Fig. 4(a) and Fig. 4(b). As can be seen by comparing Fig. 3 with Fig. 4, the tip side of the second lumen 22 is cut (CT) in an oblique direction intersecting the axis of the main body 11 at an acute angle, so that the opening area of ​​the second lumen 22 is large. This improves the efficiency of suctioning smoke generated when incising biological tissue, and also prevents the corners on the tip side of the main body 11 from hitting anything other than the affected area when the practitioner uses the electric scalpel 1, resulting in a decrease in the efficiency of the procedure.

[0020] <First lumen 21> 5, the first lumen 21 is a conduit that extends in the axial direction inside the main body 11 and through which the sheath 4 (see FIG. 1) can be inserted. The tip of the first lumen 21 opens to the outside from the tip surface of the main body 11, and the base end of the first lumen 21 opens to the outside from the base end surface of the main body 11. The inner diameter of the first lumen 21 is set to be slightly larger than the diameter of the sheath 4 of the electric scalpel 1, so that the sheath 4 of the electric scalpel 1 can be inserted through the incision portion 6 of the jaw insert 5 protruding from the tip side of the first lumen 21.

[0021] 5(a), 5(b), and 5(c), the cross-sectional shape of the first lumen 21 is, for example, a circular shape centered on an eccentric point that is eccentric from the axis of the main body 11. However, the cross-sectional shape of the first lumen 21 is not necessarily limited to a substantially circular shape. After the electric scalpel 1 is inserted into the first lumen 21 and assembled, the sheath 4 of the electric scalpel 1 occupies the inside of the first lumen 21.

[0022] <Second lumen 22> As shown in Fig. 5, the second lumen 22 extends in the axial direction inside the main body 11 and is a conduit for sucking in smoke generated by incision and coagulation of biological tissue. The tip of the second lumen 22 opens to the outside from the tip surface of the main body 11, and the base end of the second lumen 22 opens to the outside from the base end surface of the main body 11. As shown in Fig. 5(a), the cross-sectional shape of the second lumen 22 is a substantially elliptical shape centered on an eccentric point eccentric from the axis of the main body 11. Note that the cross-sectional shape of the second lumen 22 is not necessarily limited to the substantially elliptical shape shown in Fig. 5(a).

[0023] For example, as shown in FIG. 5(b), the cross-sectional shape of the second lumen 22A may be a curved ellipse shape in which both sides of the major axis of the approximately elliptical shape are curved along the first lumen 21. In short, it is preferable to set the cross-sectional area of ​​the second lumen 22A as large as possible to increase the efficiency of suctioning smoke. As shown in FIG. 5(c), in addition to the first lumen 21 and the second lumen 22, for example, a pair of small circular third lumen 23, 23, etc., symmetrical with respect to the vertical direction perpendicular to the axis of the main body 11 may be provided inside the main body 11. For example, each of the third lumen 23 may be connected at its base end to the second lumen 22 and used for suctioning smoke or for another purpose.

[0024] The cross-sectional shape of the second lumen 22 is set so as not to overlap with the longitudinal cross-sectional area of ​​the first lumen 21 which occupies the main part inside the main body 11. As shown in Fig. 7(c) and Fig. 8, the base end side of the main body 11 is provided with an attachment port 12 for fixing a suction port 24 communicating with the second lumen 22 and for sucking smoke to the outside in order to connect a suction tube 40. The suction tube 40 will be described in detail later.

[0025] <Fixed part 30> 6 to 12, the fixing part 30 is for fixing the sheath 4 of the electric scalpel 1 inserted into the first lumen 21 on the base end side of the main body 11. The fixing part 30 has a pair of clamping pieces 32, 32 that open and close by a hinge 31, and can be fixed to the outer periphery of the sheath 4 of the electric scalpel 1 by fastening a fixing screw 33 that passes from one clamping piece 32 to the other clamping piece 32. The fixing part 30 is integrally formed from a hard synthetic resin, such as polyethylene or polypropylene.

[0026] An internal space with a semicircular cross section is formed inside each of the clamping pieces 32, which becomes a through hole 34 that matches the outer periphery of the sheath 4 when the clamping pieces 32 are fitted together. One end of each clamping piece 32 is connected so as to be openable and closable by a hinge 31 connected to the thin wall, and the other end of each clamping piece 32 is provided with a screw hole 35 through which a leg 33b (see FIG. 10) extending from the head 33a of the screw 33 is passed. As shown in FIG. 8, one of the clamping pieces 32 located on the head 33a side of the screw 33 is provided with a slit 32a for facilitating elastic deformation of the base end side where the screw hole 35 is located when opening and closing.

[0027] 7(c), the through hole 34 of the fixing part 30 allows the base end side of the main body part 11 fitted over the sheath 4 to be inserted up to a predetermined length, and has a step 34a that abuts the base end surface of the main body part 11 via a packing 36. The step 34a serves as a stopper that allows only the sheath 4 to be inserted from one end of the through hole 34 and prevents the main body part 11 from being passed through the other end of the through hole 34. The packing 36 interposed between the step 34a and the base end surface of the main body part 11 covers the base end opening of the second lumen 22 so as to close it, while an insertion hole 37 that matches the base end opening of the first lumen 21 is provided, and the sheath 4 can be passed through as is.

[0028] With such a fixing part 30, by tightening the screw 33, in Fig. 7(c), the rear half part near the base end of each clamping piece 32 can directly fix the base end side of the sheath 4, and the front half part near the tip of each clamping piece 32 can fix the base end side of the main body part 11. Fixing the base end side of the main body part 11 with the front half part of each clamping piece 32 also fixes the sheath 4 inserted into the first lumen 21 in the main body part 11. On the other hand, by loosening the screw 33, the fixed state of the main body part 11 and the base end side of the sheath 4 by the fixing part 30 can be released.

[0029] <Suction tube 40> As shown in Fig. 1, the suction tube 40 is a long, thin tube that is flexible enough to be bent freely, but is preferably made of a relatively hard resin such as polyvinyl chloride (PVC) to prevent pressure loss due to buckling. As shown in Fig. 7(c), one end of the suction tube 40 is press-fitted and fixed into the suction port 24 protruding from the base end of the main body 11.

[0030] The suction port 24 communicates with the base end opening of the second lumen 22 (the mounting port 12) on the base end side of the main body 11 to suck smoke to the outside, and is formed, for example, in a hollow tubular shape. Here, the suction port 24 is adhesively fixed to the mounting port 12 in a state where it is slightly inserted into the second lumen 22. Furthermore, the fixing part 30 is set so that a gap 38 (see FIG. 6(b)) is generated between the other ends of the clamping pieces 32 to avoid interference with the suction port 24, even when the clamping pieces 32 are closed to fix the base end side of the main body 11.

[0031] <Function of medical smoke exhaust device 10> The operation of the medical smoke evacuator 10 according to the present embodiment will now be described. First, to manufacture the medical smoke evacuator 10, the main body 11 having the first lumen 21 and the second lumen 22 therein is formed. The main body 11 may be formed, for example, by a 3D printer. The main body 11 may also be formed by drilling the two lumens 21, 22 into a rod-shaped resin body later, or by integrally molding the main body 11 using a molding die. Next, a tubular suction port 24 is adhesively fixed to the mounting port 12 (see FIG. 7(c)) provided on the base end side of the main body 11.

[0032] The sheath 4 of the electric scalpel 1 is inserted into the first lumen 21 of the main body 11 from its proximal end opening, starting from the tip side where the incision portion 6 is located. This causes the medical smoke evacuator 10 to be attached along the axial direction of the sheath 4 of the electric scalpel 1. Next, the clamping pieces 32 of the fixing part 30 are opened to clamp the proximal end of the main body 11 and the sheath 4, which are aligned with each other, between them, as shown in Fig. 7(c).

[0033] A packing 36 is interposed inside the fixing part 30 between the step part 34a and the base end surface of the main body part 11. As a result, the base end opening of the second lumen 22 in the main body part 11 is blocked by the packing 36, thereby improving the airtightness of the smoke exhaust route from the second lumen 22 to the suction tube 40. The packing 36 is provided with an insertion hole 37 that matches the base end opening of the first lumen 21 in the main body part 11, and the sheath 4 passes directly through the packing 36.

[0034] Then, by closing the pair of clamping pieces 32, 32 and tightening the screw 33 (see FIG. 12), the main body 11 and the base end side of the sheath 4 can be reliably fixed. This makes it possible to prevent the main body 11 from shifting in its relative position in the axial direction of the sheath 4 of the electric scalpel 1. On the other hand, by loosening the screw 33 (see FIG. 11), it becomes possible to move the fixing part 30 together with the main body 11 in the axial direction of the sheath 4. Therefore, the relative position of the main body 11 in the axial direction of the sheath 4 of the electric scalpel 1 can be appropriately adjusted so that the incision part 6 just protrudes from the tip of the main body 11.

[0035] When using the medical smoke evacuator 10, the base end of the suction tube 40 connected to the suction port 24 of the main body 11 is attached to a suction device (not shown). Also, although not shown, the terminal of the electric cord of the electric scalpel 1 is connected to a control device of the electric scalpel 1, and the practitioner can use the medical smoke evacuator 10. Then, by the practitioner's technique, the incision portion 6 protruding from the tip side of the main body 11 is moved to the vicinity of the affected area to be incised in the patient's body cavity, and the scalpel tip electrodes 6a, 6b are opened and closed to incise or coagulate the affected area.

[0036] Smoke generated from biological tissue during the procedure with the electric scalpel 1 is taken in by the second lumen 22 opening at the tip surface of the main body 11 and is discharged to the outside through the suction port 24 and the suction tube 40. In this way, with this medical smoke exhaust device 10, incision treatment with the electric scalpel 1 can be performed while absorbing smoke, and the smoke can be efficiently sucked in from immediately adjacent to the smoke source (affected area). Furthermore, with this medical smoke exhaust device 10, the number of trocars required for smoke exhaust devices in the prior art can be reduced.

[0037] 4, the portion of the tip side of the main body 11 where the second lumen 22 opens is cut (CT) in an oblique direction intersecting the axis at an acute angle, thereby increasing the opening area of ​​the second lumen 22. This improves the efficiency of suctioning smoke generated when incising biological tissue, and prevents the corners on the tip side of the main body 11 from hitting anything other than the affected area, thereby reducing the efficiency of treatment.

[0038] During a procedure using the medical smoke evacuator 10, the main body 11 and the base end side of the sheath 4 can be reliably fixed, particularly by the fixing part 30, as described above. This simple configuration and easy operation can reliably prevent relative positional displacement of the main body 11 in the axial direction of the sheath 4 of the electric scalpel 1, allowing for stable incision treatment. In addition, inside the fixing part 30, the base end opening of the second lumen 22 is blocked by the packing 36 as shown in Fig. 7(c), so that airtightness can be ensured on the base end side of the second lumen 22 other than at the suction port 24.

[0039] <Configuration and Effects of the Present Invention> Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment. The present invention derived from the above-described embodiment will be described below.

[0040] First, the present invention provides a medical smoke exhaust device 10 that is attached to the axial direction of a sheath 4 of an incision device 1 used in an incision procedure and is capable of aspirating smoke generated by the incision procedure, A main body 11 formed in a long cylindrical shape to be attached to the outer periphery of the sheath 4; a first inner cavity 21 extending in the axial direction inside the main body 11 and through which the sheath 4 can be inserted; A second lumen 22 extending in the axial direction inside the main body 11 and capable of sucking smoke, A fixing part 30 that can be fixed to the sheath 4 is provided on the base end side of the main body part 11.

[0041] According to such a medical smoke evacuation device 10, by inserting the sheath 4 of the incision device 1 into the first lumen 21 of the main body 11, it can be easily attached along the axial direction of the sheath 4. Moreover, smoke generated during the procedure of the incision device 1 can be sucked in by the second lumen 22 of the main body 11 and can be exhausted to the outside, thereby preventing poor visibility of the endoscope and contamination of the lens caused by smoke.

[0042] According to the present medical smoke evacuator 10, the main body 11 can be fixed to the sheath 4 by the fixing part 30 provided on the base end side of the main body 11. This makes it possible to reliably prevent the main body 11 of the incision device 1 from shifting in position relative to the sheath 4, and allows for stable incision treatment. Specifically, the incision device 1 here is, for example, the electric scalpel 1 described above.

[0043] In addition, in the present invention, the fixing portion 30 is characterized in that it is possible to fix the sheath 4 and the base end of the main body portion 11 sandwiched between a pair of clamping pieces 32 that open and close relative to each other by tightening a screw 33 that penetrates from one to the other of the pair of clamping pieces 32.

[0044] Such a fixing portion 30 can be easily operated with a simple configuration, and reliably prevents relative positional deviation of the main body portion 11 in the axial direction of the sheath 4 of the incision device 1, without any risk of increased costs.

[0045] In addition, the present invention provides a packing 36 for closing a proximal end opening of the second inner cavity 22 that opens on the proximal end side of the main body 11 on the inner side of each clamping piece 32 of the fixing part 30, A suction port 24 is provided on the base end side of the main body 11, which passes between the clamping pieces 32 and communicates with the front of the base end opening of the second lumen 22 to suck smoke to the outside.

[0046] According to this configuration, the suction port 24 on the base end side of the main body 11 can be opened in a direction that does not interfere with the main body part (nut 3 and handle 2) of the incision device 1. In addition, the base end opening of the second lumen 22 toward the main body part of the incision device 1 can be closed by the packing 36, so that the airtightness at that site can be improved.

[0047] In addition, in the present invention, the suction port 24 is formed in a tubular shape to which a suction tube 40 for sucking smoke to the outside through the second lumen 22 can be connected. With this configuration, the suction tube 40 can be easily connected to the suction port 24, and the suction tube 40 can be easily arranged in a direction that does not interfere with the main body of the incision device 1.

[0048] In addition, the present invention is characterized in that the portion of the tip side of the main body portion 11 where the second lumen 22 opens is cut in an oblique direction intersecting the axis of the main body portion 11 at an acute angle. According to this configuration, it is possible to ensure that the opening area of ​​the second lumen 22 is as large as possible within the limited diameter range of the main body 11. Therefore, it is possible to improve the efficiency of suctioning smoke generated when incising biological tissue, and to prevent the corners on the tip side of the main body 11 from hitting anything other than the affected area, thereby preventing a decrease in treatment efficiency.

[0049] Furthermore, the present invention is characterized in that the incision portion 6 at the tip of the sheath 4 is positioned to protrude from the tip opening of the first inner cavity 21, which opens on the tip side of the main body portion 11, at a position very close to the tip opening. With this configuration, the incision portion 6 is located close to the distal end opening of the first lumen 21, rather than away from the distal end opening, and similarly, the distal end opening of the second lumen 22 is located close to the incision portion 6. Therefore, smoke generated during the procedure can be efficiently sucked in from close to the source (the affected area).

[0050] Although the embodiment of the present invention has been described above with reference to the drawings, the specific configuration is not limited to the above-mentioned embodiment, and the present invention includes modifications and additions that do not deviate from the gist of the present invention. For example, the specific shapes and relative sizes of the main body 11 and the fixing part 30 are not limited to those shown in the drawings.

[0051] In addition, in this embodiment, an electric scalpel 1 is used as the incision device to which the medical smoke evacuator 10 is attached. However, the present invention can also be applied to other incision devices, such as an ultrasonic scalpel or a laser scalpel. [Industrial Applicability]

[0052] The medical smoke evacuator according to the present invention is not limited to being attached to an electric scalpel as an incision device, but can be applied to various other types of incision devices. [Explanation of symbols]

[0053] 10. Medical smoke exhaust device 11...Main body 12...Installation port 21...First lumen 22…Second lumen 23…Third lumen 24…Suction port 30…Fixed part 31…hinge 32...Holding piece 33…Screw 34...Through hole 35…Screw hole 36…Packing

Claims

1. A medical smoke exhaust device that is attached to the axial direction of a sheath of an incision device used in an incision procedure and is capable of sucking in smoke generated by the incision procedure, a main body portion formed in a long cylindrical shape and attached to an outer periphery of the sheath; a first inner cavity extending in an axial direction inside the main body and through which the sheath can be inserted; a second lumen extending axially within the body and capable of drawing smoke; A medical smoke evacuator characterized in that a fixing portion capable of being fixed to the sheath is provided on the base end side of the main body.

2. The medical smoke evacuator according to claim 1, characterized in that the fixing portion is capable of fixing the sheath and the base end of the main body portion clamped between a pair of clamping pieces that open and close relative to each other by tightening a screw that passes from one to the other of the clamping pieces.

3. a packing is provided on the inside of each clamping piece of the fixing part to close a base end opening of the second inner cavity that opens on the base end side of the main body part; The medical smoke exhaust device as described in claim 2, characterized in that a suction port is provided on the base end side of the main body, which passes between each of the clamping pieces and connects to the front of the base end opening of the second inner cavity to suck smoke to the outside.

4. 4. The medical smoke exhaust device according to claim 3, wherein the suction port is formed in a tubular shape to which a suction tube for sucking smoke to the outside through the second lumen can be connected.

5. The medical smoke evacuator 10 as described in claim 1, 2, 3 or 4, characterized in that the portion of the tip side of the main body where the second inner cavity opens is cut in an oblique direction intersecting the axis of the main body at an acute angle.

6. 5. The medical smoke evacuator (10) according to claim 1, 2, 3 or 4, characterized in that the incision portion at the tip of the sheath is positioned protruding from a tip opening of the first inner cavity which opens on the tip side of the main body portion.

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