JP2001293001A - Trocar cannula - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trocar cannula which enables simple removal of an open-close valve in rinsing after use for sufficient and thorough cleaning thereof and simply accomplishes replacing work of parts even when aging of the open- close valve requires repairing. SOLUTION: The trocar cannula 1 is provided with an inserting part 2 having a duct 7 which is put into a paries through a puncture made thereinto to guide a device into a celoma, a holding part 3 which is provided on the hand side of the inserting part 2 and has an internal space 8 communicated with the duct 7, an opening part 9 which is provided at the holding part 3 to be communicated with the internal space 8, a flap valve 31 which is located between the internal space 8 and the opening part 9 to secure airtightness of the internal. space 8 and a push button 34 for the operation of opening or closing the flap valve 31. At least the flap valve 31 is detachably mounted on the holding part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trocar tube for puncturing a body wall of a living body and guiding an instrument such as an optical viewing tube or a treatment tool into a body cavity.

[0002]

2. Description of the Related Art A conventional trocar mantle tube is disclosed in, for example, Japanese Utility Model Registration No. 2533624, Japanese Patent Laid-Open No. 9-2762.
As disclosed in Japanese Patent No. 87, a long insertion portion is provided, and a conduit for guiding instruments such as an optical viewing tube and a treatment tool into a body cavity is formed inside the insertion portion. When piercing or penetrating the trocar mantle into the patient's skin, insert the trocar inner needle into the conduit, fix it, close the distal end opening of the insertion portion with the trocar inner needle, and insert the trocar inner needle from the distal end of the insertion portion. With the sharp tip protruding, the patient's skin is punctured and penetrated.

[0003] Further, a holding portion comprising a main body connected to the hand side of the insertion portion and a lid air-tightly and detachably connected to the main body is provided on the proximal side of the trocar outer tube. The lid has an opening for inserting instruments such as optical viewing tubes and treatment tools, and an elastic cap that fits tightly to the instrument insertion section to keep the opening airtight when the instrument is introduced into the trocar mantle. Is provided.

[0004] The holding portion is provided with a flap valve for ensuring airtightness of the opening when the instrument is pulled out, and a packing for keeping airtight by closely contacting the flap valve. Also,
The flap valve extends perpendicularly to the long axis of the trocar mantle tube, can pivot about a rotation axis provided at a position eccentric to the long axis, and is urged to a position to close the opening by a spring. It is pressed so as to be in close contact with the packing and can maintain airtightness. In addition, the flap valve is connected to an operation button that protrudes outward from the holding portion via a small pin, and can be opened and closed by operating the operation button from the outside and turning the flap valve around a rotation axis. it can.

Further, as disclosed in Japanese Patent Application No. 11-066368, the packing provided on the cover of the main body is detachable from the cover, so that the packing is deteriorated, deformed or damaged. In some cases, the airtightness of the flap valve can be replaced when the airtightness cannot be ensured.

[0006]

However, the above-mentioned flap valve is composed of several parts connected to each other, including a helical biasing spring, and is incorporated inside the holding portion. For this reason, there is a small gap between the spring and each part, and when cleaning after surgery,
Although a small brush is inserted into the holding portion to remove dirt, cleaning is troublesome. In addition, if ultrasonic cleaning is performed to wash the inside of a small gap, the cleaning operation becomes complicated, and as a result of repeated ultrasonic cleaning during use for a long period of time, the trocar outer tube itself is reduced. It may cause deterioration, scratches, deformation, etc. of parts.

[0007] Further, during the operation, each time a device such as an optical viewing tube or a treatment tool is inserted into or removed from the trocar mantle tube, the rubber valve and the flap valve are forcibly opened and closed, and are strongly rubbed by the device. For this reason, it is conceivable that the rubber valve, the flap valve, and the components that make up the main body and the lid of the trocar mantle tube are damaged or deformed relatively quickly, making it impossible to maintain airtightness.

Conventionally, in such a case, the broken product is sent to the manufacturer of the trocar mantle tube and disassembled and repaired, so that the product can be used again. Required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to easily disassemble an on-off valve at the time of cleaning after use, to easily clean every corner, and to open and close. It is an object of the present invention to provide a trocar mantle tube that can be easily removed and replaced when a valve and its constituent parts are deteriorated, deformed, or damaged.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an insertion portion having a conduit for puncturing a body wall and guiding an instrument into a body cavity, and provided at a hand side of the insertion portion. A holding portion having an internal space communicating with the pipeline, an opening provided in the holding portion and communicating with the internal space, and an airtightness of the internal space provided between the internal space and the opening. In a trocar mantle tube provided with an on-off valve to be operated and an operating member for opening and closing the on-off valve, at least the on-off valve is detachably attached to a holding portion.

According to the above construction, the on-off valve and its related parts are made detachable with respect to the main body of the trocar mantle tube, so that the on-off valve can be easily removed when washing after use, so that all corners can be sufficiently removed. It becomes possible to remove dirt, and even if the on-off valve is deteriorated and needs to be repaired, parts can be easily replaced.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 6 show a first embodiment, and FIG.
FIG. 2 is a side view of a trocar mantle tube, and FIG. 2 is a vertical sectional side view of the same. As shown in FIGS. 1 and 2, the trocar mantle tube 1 includes an insertion portion 2 formed in a long tubular shape, and a holding portion 3 provided near the insertion portion 2. The inner needle 4, which is detachably attached to the trocar outer tube 1, has a distal end portion formed as an elongated needle portion 5. A proximal portion of the inner needle 4 is formed with a cap-shaped inner needle main body 6 which is fitted to a part of the holding portion 3. The insertion portion 2 of the mantle tube 1 forms a conduit 7 whose both ends are open. The proximal side of the pipe 7 communicates with a space 8 formed inside the holding unit 3. An opening 9 communicating with the space 8 is provided at a proximal end of the holding portion 3.
Are formed.

On the other hand, a sharp blade 10 is formed at the tip of the needle 5 of the inner needle 4. When the inner needle 4 is inserted into the conduit 7 of the outer tube 1, the inner needle 4 is arranged from the conduit 7 into the space 8, and the inner needle main body 6 is fixedly engaged with the proximal end of the holding portion 3. . In this mounted state, the blade portion 10 of the inner needle 4 is positioned at a position protruding forward from the distal end opening 11 of the insertion portion 2. The dimensions of the outer tube 1 and the inner needle 4 are determined so as to achieve such a relation.

The inner needle main body 6 is provided with a seal fixing frame 42 described later.
An opening 12 is formed in a cap shape so as to be fitted on the outer periphery of the device, and is directed toward the distal end. The holding unit 3
In order to fix the inner needle main body 6 of the inner needle 4 to the inner needle main body 6, a fitting groove 15 is formed on the inner peripheral surface of the distal end side opening 12 of the inner needle main body 6, and an elastic O-ring 16 is fitted in the fitting groove 15. It is fitted and fixedly attached. When the inner needle main body 6 is fitted to the seal fixing frame 42 of the holding section 3, the O-ring 16
Are fitted into and engaged with the engagement grooves 17 formed on the outer periphery near the proximal side of the seal fixing frame 42. Thereby, the inner needle 4 can be fixed to the trocar mantle tube 1 so as not to rattle in the longitudinal direction.

The holding portion 3 has a main body portion 21 and a lid portion 22. The distal end portion of the main body portion 21 is screwed into a screw 23 formed at the proximal end of the insertion portion 2 so that the insertion portion is formed. 2 and the main body 21 are detachably connected and fixed. The connecting portion between the insertion portion 2 and the main body portion 21 has the screw 2
An O-ring 24 made of an elastic material is interposed adjacent to 3 to ensure airtightness between the insertion section 2 and the holding section main body 21. As shown in FIG. 3, the lid portion 22 is detachably connected to and fixed to the main body portion 21 by attaching means described later. As shown in FIG. 4, the main body 21 of the holding part 3 is provided with an insufflation gas inlet 26 communicating with the space 8 formed therein.

An opening / closing valve which can be opened and closed to close the inner hole (passage) when the instrument is not inserted into the mantle tube 1 and insert the instrument when the instrument is inserted is provided inside the lid portion 22. Flap valve 31 is provided. Flap valve 31
Is in a position perpendicular to the long axis of the mantle tube 1 as shown in FIG. 3 when closed, and substantially open with respect to the long axis of the mantle tube 1 as shown in FIG. Move to a parallel position.

The flap valve 31 serves as a means for shutting off the space 8 of the holding portion 3 and the opening 9 communicating therewith to ensure airtightness when a treatment tool or the like is not inserted into the mantle tube 1. is there. The flap valve 31 is rotatable around a rotation shaft 32 extending in a direction orthogonal to the long axis of the mantle tube 1. The flap valve 31 is a coil-shaped bias provided to surround the rotation shaft 32. A spring 33 is elastically biased to a closed position perpendicular to the long axis of the mantle tube 1. The flap valve 31 can be rotated by a push button 34 as an operation member provided on the lid 22. The push button 34 is slidably provided on the side wall of the lid 22 in a direction orthogonal to the long axis of the mantle tube 1, is provided on the flap valve 31 at the tip of the push button 34, and is parallel to the rotation shaft 32. 3 for receiving a simple drive shaft 35
6 are formed. When the push button 34 is pushed in the central axis direction of the mantle tube 1 from the state of FIG. 3, the end of the push button 34 on the side of the flap valve 31 connects the drive shaft 35 provided on the flap valve 31 to the mantle tube 1. The flap valve 3 is pushed in the direction of the central axis to oppose the urging force of the urging spring 33.
1 is rotated about a rotation axis 32, and as shown in FIG.
The flap valve 31 can be moved to a position substantially parallel to the long axis of the mantle tube 1.

A cylindrical seal receiving member 41 is coaxially provided at the proximal end of the lid 22. The seal fixing frame 42 is engaged with a hand edge of the seal receiving member 41. A substantially cylindrical seal member 43 made of an elastic material is attached and fixed between the seal receiving member 41 and the seal fixing frame 42 so as to be sandwiched therebetween. Seal member 4
3 is a ring-shaped sealing portion 4 as a sealing means that allows the back surface of the flap valve 31 to be in close contact with the entire circumference.
In addition, the proximal edge of the seal member 43 forms an elastic film-like seal cap portion 45 that functions as a sealing means when inserting an instrument such as an optical sight tube or a treatment tool. .

Further, by attaching a soft member (not shown) such as synthetic resin, rubber, or cloth to the back surface of the flap valve 31, instruments such as an optical viewing tube and a treatment tool are inserted from the seal cap portion 45 side. Occasionally, even if the flap valve 31 abuts, damage to the instrument can be prevented by the buffering action of the soft member.

The sealing member 43 is positioned and fixed at a position where the opening edge of the distal end side of the sealing portion 44 is exposed to the space 8. The back surface 31a of the flap valve 31 urged by the urging spring 33 is pressed tightly over the entire periphery of the opening edge of the seal portion 44 to ensure airtightness. That is, the flap valve 31
The seal portion 44 constitutes a seal valve that closes when instruments such as the inner needle 4 and forceps (not shown) are not inserted.

A hole 47 communicating with the inner space 46 of the seal member 43 is provided at the center of the seal cap portion 45. When the flap valve 31 is pushed and opened against the urging force of the urging spring 33 by passing instruments such as the needle portion 5 of the inner needle 4 and forceps (not shown) through the hole 47, the internal space 46 of the seal member 43 passes through the gap. Although it communicates with the space 8, the outer periphery of the needle portion 5 of the inner needle 4 and the instrument such as the forceps is in close contact with the sealing cap portion 45 and the opening edge of the hole 47, so that the airtightness between the internal space 46 and the outside is reduced. Secure. That is, the seal cap portion 45 constitutes a seal valve that closes when instruments such as the inner needle 4 and forceps (not shown) are inserted.

As shown in FIG. 4, a pair of flanges 71 are formed on the outer peripheral surface of the rear end of the main body 21 in a vertically symmetrical manner.
Are provided all around. In addition, two flange portions 7
The cam grooves 73 are formed in each of them. On the other hand, a pair of claw portions 75 are formed symmetrically in the vertical direction at the distal end portion of the lid portion 22. As shown in FIGS. 5A and 5B, a valve unit 51 is removably fitted inside the lid 22. The valve unit 51 is shown in FIG.
As shown in FIG. 2B, it is composed of a flap valve 31, a rotary shaft 32, a biasing spring 33, a drive shaft 35, and a unit frame 52. The unit frame 52 includes two arm portions 53 and a U-shaped portion 54 having elasticity for connecting the two arm portions to each other. When the width returns to the original width as shown in FIG. 6B due to the elasticity of the portion 54, the portion 54 is hooked and fixed to a pair of claws 55 provided on the lid portion 22. As shown in FIG. 5B, the groove 36 at the flap side end of the push button 34 is open at one end, and when the valve unit 51 is attached to or detached from the lid 22, the drive shaft 35 is connected to the groove 36. It can be fitted into and removed from the groove 36.

FIG. 7 shows a second embodiment. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. FIG. 7 is a vertical cross-sectional side view of the main body 21. A seal member 43 made of an elastic member is fitted in a seal receiving member 41 and an opening 81 of the lid 22, and is fixed by a seal fixing frame 42. By removing the seal fixing frame 42 from the seal receiving member 41, the seal member 43 can be detached and replaced.

At the end of the opening portion 81 of the lid portion 22 facing the space 8, a ring-shaped projection 82 as a butting portion projecting toward the space 8 and surrounding the seal portion 44 of the seal member 43 is coaxial. Is formed.

When the sealing member 43 is attached to the lid 22, the flap valve 31 comes into close contact with the tip of the sealing portion 44 of the sealing member 43, and when the sealing member 43 is removed from the lid 22, The flap valve 31 contacts the ring-shaped projection 82 all around.

When the sealing member 43 is removed from the lid 22, the flap valve 31 comes into full contact with the projection 82, so that the airtightness is not completely airtight but is almost airtight. , Can obstruct the flow of gas.

FIGS. 8 and 9 show a third embodiment, in which the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. FIG. 8 is a longitudinal sectional side view of the main body 21, and FIG.
FIG. 9 is a view of the lid portion 22 as viewed from the distal end side (a view in the direction of arrow A), and FIG.

A window 84 is provided in a part of the opening 83 of the lid 22. When the seal member 43 is removed, the flap valve 31 and the urging spring 33 can be looked through from the hand side of the lid 22. Through the window 84, the lid 2
The parts constituting the flap valve 31 can be thoroughly washed from outside using a cleaning brush or the like.

According to each of the above embodiments, the following configuration is obtained.

(Supplementary Note 1) An insertion portion having a conduit for guiding the instrument into the body cavity by puncturing the body wall, and a holding portion provided on the hand side of the insertion portion and having an internal space communicating with the conduit. Part, an opening provided in the holding part and communicating with the internal space, an opening / closing valve between the internal space and the opening for ensuring airtightness of the internal space, and an operation of opening and closing the opening / closing valve A trocar mantle tube provided with a member, wherein at least the on-off valve is detachable from a holding part.

(Supplementary Note 2) An insertion portion having a conduit for guiding an instrument into a body cavity by puncturing a body wall, and a holding portion provided at a hand side of the insertion portion and having an internal space communicating with the conduit. Part, an opening provided in the holding part and communicating with the internal space, an on-off valve provided between the lumen and the opening to ensure airtightness of the lumen, and an airtight seal secured to the on-off valve And a trocar outer tube having a seal cap portion that is detachable from the holding portion, wherein when the seal cap portion is removed from the holding portion, the on-off valve abuts to suppress gas leaking from the internal space. A trocar mantle tube characterized in that a part is provided in a holding part.

(Supplementary note 3) The trocar outer tube according to Supplementary note 1 or 2, wherein a detachable connecting portion is provided between the on-off valve and the operating portion.

(Supplementary Note 4) The trocar outer tube according to supplementary note 2, wherein the abutting portion is made of the same material as the holding portion.

(Supplementary Note 5) The trocar outer tube according to Supplementary Note 2, wherein an abutting portion is provided so as to surround a part of the seal cap portion detachable from the holding portion.

According to appendix 1, by making the on-off valve and its related parts detachable from the main body of the mantle tube,
The on-off valve can be easily removed when cleaning after use, so that all corners can be sufficiently cleaned, and even if the on-off valve deteriorates and needs to be repaired, parts can be easily replaced. it can.

According to Supplementary Note 2, the packing may be temporarily removed when removing the resected tissue or dirty gauze from the body cavity during the operation. In this manner, the packing must be removed during the operation. Even when it is not possible, leaking insufflation gas is suppressed as much as possible and does not disturb the operation.

On the other hand, in the conventional trocar mantle tube, a trocar inner needle is disclosed in JP-B-2-39446, JP-B-7-39446.
As disclosed in JP-A-1026, a cutting edge portion is provided at the tip of a cylindrical insertion portion, and this cutting edge portion has a substantially triangular pyramid shape and has three ridge edges along its axial direction. Something you are doing. The trocar inner needle functions as a blade for cutting the body wall when the piercing edge punctures the body wall. However, when the trocar mantle tube is repeatedly used, there is a problem that the edge of the ridge line is gradually rounded and the sharpness is deteriorated.

FIGS. 10 to 14 show that even if they are used repeatedly,
The present invention discloses a trocar mantle tube that can always obtain good sharpness without deteriorating the sharpness of the inner needle.

That is, FIGS. 10 and 11 show Disclosure Example 1, FIG. 10 is a perspective view of the inner needle of the trocar, and FIG.
FIG. 2 is a longitudinal sectional side view of the same, and FIG. 2B is an enlarged sectional view of a needle part.

The trocar inner needle 101 has a tip 102
The insertion section 103 includes an insertion section 103 and a grip section 104.
Is provided with a passage 105 penetrating from the distal end portion 102 to the grip portion 104. A knife means 106 is provided inside the passage 105, and the knife means 106 has an elongated shaft portion 107 extending from the grip portion 104 of the trocar inner needle 101 to the distal end portion 102, a sharp needle portion 108 at the distal end, and a shaft portion. And a main body 109 on the hand side of the main body 107. Male screws 109a are respectively provided on the grip 104 and the main body 109.
And a female screw 104a are provided so that both can be screw-fixed. The needle portion 108 protrudes distally from an opening 110 at the distal end of the passage 105, and as shown in FIG.
02 is slightly shifted rearward, and both outer peripheral surfaces are substantially smoothly continuous.

By unscrewing the grip portion 104 and the main body portion 109, the trocar inner needle 101 can be used to cut the blade means 1.
06 can be removed. Needle part 1 of blade means 106
When 08 becomes round and the sharpness deteriorates, the same sharpness as a new one can be obtained again by assembling the new blade means 106 to the inner needle 101 of the trocar.

FIGS. 12 and 13 show Disclosure Example 2 and FIGS.
2 (a) is a perspective view of the distal end side of the trocar inner needle, FIG.
FIG. 13B is a front view of the same, and FIG. 13 is a vertical sectional side view of the inner needle of the trocar.

The grip 1 on the hand side of the trocar inner needle 115
A blade means 119 is detachably provided inside a passage 118 provided so as to penetrate from the tip 16 to the tip 117. A plate-like blade portion 120 is provided at the tip of the blade means 119.
Is provided, and a sharp edge 121 is provided at the leading edge of the blade portion 120.
Is provided. To cope with this, the distal end 117 of the trocar inner needle 115 has a slit-shaped opening 12.
2, the blade portion 120 projects forward from the opening 122, and the edge 121 is exposed.

On the other hand, a circumferential groove 123 is provided on the outer peripheral surface on the hand side of the grip portion 116, and the elastic ring 1 having elasticity provided inside the main body portion 124 on the hand of the blade means 119.
The blade tool 119 is fixed to the trocar inner needle 115 by the engagement of the groove 25 into the groove 123. Also,
By forcibly removing the elastic ring 125 from the groove 123, the fixing between the inner needle 115 of the trocar and the blade means 119 can be released and separated.

The edge 121 is set to have a length substantially crossing the cross section of the distal end portion 117 of the inner trocar needle 115, and can open the body wall larger than in the first disclosed example. The body wall can be punctured smoothly.

FIG. 14 shows disclosed example 3, in which FIG. 14 (a) is a perspective view of the distal end side of the trocar inner needle, and FIG. 14 (b) is a front view thereof.

The distal end of the distal end portion 131 of the trocar inner needle 130 has a tapered shape, is formed with two or more ridges 132, and a slit-like opening 133 is formed at the top of the ridge. . The tip edge 134 of the blade means is fixed so as to protrude forward from the opening 133. The leading edge 134 is located so as to be substantially collinear with the ridge line portion 132. After the body wall is cut open at the leading edge 134, the ridge 13
2 can be pushed open. Since the distal edge 134 and the ridge 132 are on the same line, expansion can be continuously and smoothly performed from the incision of the body wall.

According to the disclosed example described above, in the inner needle of the trocar, a cutting blade penetrating the distal end portion and protruding forward from the distal end, and a cutting means having a lock mechanism capable of fixing / releasing to the grip portion are provided. By being detachably provided, there is an effect that the sharpness is always obtained without deterioration of the sharpness even when used repeatedly.

[0050]

As described above, according to the present invention, the on-off valve for ensuring the airtightness of the internal space of the holding section and its related parts are made detachable so that the on-off valve can be used for cleaning after use. There is an effect that the components can be easily removed and the dirt can be sufficiently removed to every corner, and even if the on-off valve deteriorates and needs to be repaired, parts can be easily replaced.

[Brief description of the drawings]

FIG. 1 is a side view of a trocar mantle tube showing a first embodiment of the present invention.

FIG. 2 is a vertical sectional side view of the trocar mantle tube of the embodiment.

FIG. 3 is a vertical side view of the main body of the embodiment.

FIG. 4 is an exploded perspective view of the main body of the embodiment.

5A and 5B show a lid portion of the embodiment, and FIG.
(B) is a vertical side view.

FIG. 6 shows the same embodiment, and (a) and (b) are front views of a valve unit.

FIG. 7 is a vertical sectional side view of a main body of a trocar mantle tube according to a second embodiment of the present invention.

FIG. 8 is a longitudinal sectional side view of a main body of a trocar mantle tube according to a third embodiment of the present invention.

9A and 9B show the same embodiment, wherein FIG. 9A is a view as seen from the direction of arrow A in FIG. 8, and FIG. 9B is a view as seen from the direction of arrow B in FIG.

FIG. 10 is a perspective view of the inner needle of the trocar, showing the disclosure example 1.

FIGS. 11A and 11B show the disclosed example, in which FIG. 11A is a longitudinal sectional side view of a trocar inner needle, and FIG.

12A and 12B show Disclosure Example 2, in which FIG. 12A is a perspective view of the distal end side of a trocar inner needle, and FIG. 12B is a front view thereof.

FIG. 13 is a vertical side view of the inner needle of the trocar according to the embodiment of the disclosure.

14A and 14B show disclosure example 3, in which FIG. 14A is a perspective view of the distal end side of a trocar inner needle, and FIG. 14B is a front view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Trocar outer tube 2 ... Insert part 3 ... Holding part 4 ... Inner needle 8 ... Space 9 ... Opening 21 ... Body part 31 ... Flapper valve (open / close valve) 34 ... Push button (operation member)

Claims (1)

[Claims] 1. An insertion portion having a conduit for guiding a device into a body cavity by puncturing a body wall, and a holding portion provided at a hand side of the insertion portion and having an internal space communicating with the conduit. An opening provided in the holding portion and communicating with the internal space, an on-off valve provided between the inner space and the opening to ensure airtightness of the internal space, and an operating member for performing an on-off operation of the on-off valve And a trocar mantle tube comprising: a trocar mantle tube, wherein at least the on-off valve is detachable from a holding part.