CN109077758B

CN109077758B - Needle insertion control handle

Info

Publication number: CN109077758B
Application number: CN201811145081.9A
Authority: CN
Inventors: 杨斌; 欧阳诚梓; 杨军; 孙良俊
Original assignee: Nanjing Yigao Medical Technology Co ltd
Current assignee: Nanjing Yigao Medical Technology Co ltd
Priority date: 2018-09-29
Filing date: 2018-09-29
Publication date: 2023-06-23
Anticipated expiration: 2038-09-29
Also published as: CN109077758A

Abstract

The invention discloses a needle-feeding control handle, wherein a shell of the handle is connected with a needle-feeding sheath tube, a movable part positioned in the shell is connected with an inner catheter, and the movable part controls the inner catheter to move back and forth in the sheath tube. The surface of the movable part is provided with a first limit clamping groove and a plurality of second limit clamping grooves which are arranged at equal intervals; the shell is provided with a first clamping mechanism and a second clamping mechanism which are vertical to the surface of the shell and can move up and down; when the movable piece moves for a certain long distance, the second clamping mechanism corresponds to the second limiting clamping groove; when the movable piece is positioned at a far-end limiting distance relative to the shell, the first clamping mechanism is matched with the first limiting clamping groove. The invention provides a control handle for effectively controlling and judging the needle insertion position and distance of a needle insertion guide tube, which can prevent the sheath tube from being excessively damaged by the needle retraction of a microwave ablation needle and provides an efficient, convenient and stable design for the operator.

Description

Needle insertion control handle

Technical Field

The invention relates to the field of medical appliances, in particular to a needle insertion control handle applied to a long-sheath needle insertion catheter.

Background

Among medical instruments, endoscopes are a large class, mainly comprising a bronchoscope, a gastroscope, a enteroscope, a laparoscope, an otorhinolaryngoscope and the like, and in some operations, a working catheter is often required to be inserted into a working channel of the endoscope, wherein the working catheter comprises a sheath tube and an inner catheter arranged in the sheath tube, and a working piece such as an optical endoscope, a needle head, a dosing catheter, a sampling needle, a microwave ablation needle and the like is arranged at the front end of the inner catheter, so that the safety of application and needle insertion controllability of the product design should be considered for a needle type working room.

At present, the control structure for needle insertion in the prior art is single, the catheter is mainly inserted into the cavity of the endoscope, the main structure is a unidirectional structure, the accurate positioning cannot be realized, the depth of the ablation catheter inserted into tissues is controlled, and certain safety problems such as operation risks exist.

Disclosure of Invention

The invention aims to: the invention aims to provide a needle inserting control handle for confirming the needle inserting position of a needle inserting guide tube and the needle inserting safety distance.

The technical scheme is as follows: in order to achieve the above purpose, the needle feeding control handle comprises a shell and a movable piece in the shell, wherein the handle is connected with a needle feeding guide tube, the needle feeding guide tube comprises a sheath tube fixedly connected with the shell and an inner guide tube connected with the movable piece, a cable through hole is arranged in the movable piece, and a first limit clamping groove and a plurality of second limit clamping grooves which are equidistantly arranged at intervals are arranged on the surface of the movable piece; the shell is provided with a first clamping mechanism and a second clamping mechanism which are vertical to the surface of the shell and can move up and down; when the movable piece moves for a certain long distance, the second clamping mechanism corresponds to the second limiting clamping groove; when the movable piece is positioned at a far-end limiting distance relative to the shell, the first clamping mechanism is matched with the first limiting clamping groove; the first clamping mechanism and the second clamping mechanism are provided with elastic pieces which are continuously extruded towards the inner side of the shell; the width of the first limit clamping groove is larger than that of the second limit clamping groove.

The needle-inserting control handle is particularly suitable for needle-inserting guide pipes with sampling needles, puncture needles and microwave ablation needles at the front ends, the first limit clamping groove is used for controlling the limit distance of the backward pulling of the inner guide pipe in the needle-inserting guide pipe, and the needle-inserting control handle is particularly important in microwave ablation treatment, because the heat of 130 ℃ can be emitted by the needle head at the front end of the microwave ablation needle, the limit distance of the backward movement is set, and the microwave ablation needle head can be prevented from burning the inner guide pipe and the sheath. The second limiting clamping groove is used for helping an operator to determine the needle inserting position of the inner catheter, the equidistant intervals are determined according to the needle inserting accuracy requirement, and the distance between the equidistant intervals is generally 0.5cm to 2cm, and preferably 0.5cm. In order to ensure the effectiveness of the locking fit, the notch of the first limiting clamping groove and the notch of the second limiting clamping groove are subjected to chamfering design, and the first locking mechanism and the second locking mechanism are also subjected to chamfering design.

The first locking mechanism and the second locking mechanism can be realized in various modes, and preferably, the first locking mechanism and the second locking mechanism comprise a movable rod, a locking piece arranged on the inner side of the movable rod and a handle part positioned on the outer side of the movable rod and exposed on the surface of the shell. Based on the above mode, after the locking mechanism is embedded into the limiting groove, an operator pulls the locking mechanism outwards, and the movable piece can move relative to the shell.

Further, a spring in an extrusion state is sleeved on the movable rod, one end of the spring is propped against the inner wall of the shell, and the other end of the spring is fixed on the movable rod.

In view of the above-mentioned drawing manner, two hands are needed to be used, and in order to simplify the operation, the locking member and the handle of the second locking mechanism are respectively located at opposite sides of the movable member, and the movable rod and the handle of the second locking mechanism are connected through an intermediate member. And then change "drawing" mode into "pushing" mode, the operator utilizes the thumb to press the second locking mechanism handle that is located the casing top, can break away from in the second spacing draw-in groove of second locking mechanism's the fastener downside from the movable part, and the operator can then utilize other positions of palm to pull or promote interior pipe and move for the sheath.

The middle piece can be in various forms, for example, a bending rod which bypasses one side of the movable piece, and also can be in a cylindrical structure sleeved outside the movable piece; the annular cavity of the middle piece comprises a main body cavity part corresponding to the section shape of the movable piece and a floating cavity part for the movable piece to swing. The design of the middle piece adopts an annular sheet structure, the weight of the product part is reduced, and compared with a bending rod on one side, the closed annular structure has higher strength. In order to ensure that the middle piece cannot influence the locking fit of the second limiting clamping groove, the cavity shape of the annular middle piece is further optimally designed. For example, when the shape of the intermediate member is cylindrical, the cavity shape of the intermediate member is nearly elliptical; when the shape of the middle piece is regular quadrangular, the cavity of the middle piece is rectangular, and the extra floating cavity part of the middle piece is required to meet the requirement that the movable piece can be accommodated in the space and ensure that the movable piece can float back and forth in the cavity.

Preferably, the width of the floating cavity part corresponds to the depth of the second limiting clamping groove, and the length of the handle part of the second clamping mechanism exposed on the surface of the shell is not smaller than the depth of the second limiting clamping groove.

Preferably, the length of the handle of the first locking mechanism exposed on the surface of the shell is not smaller than the depth of the first limit clamping groove.

As a preferable scheme of the invention, the movable piece is cylindrical, and the first limit clamping groove and the second limit clamping groove are annular grooves formed in the surface of the movable piece. Further, the locking pieces of the first locking mechanism and the second locking mechanism are arc-shaped structures.

In order to further improve the use experience of operators, the surface of the shell is provided with two wing-shaped plates which are symmetrical left and right relative to the longitudinal section, and the wider surface of each wing-shaped plate is perpendicular to the needle inserting direction. The design of the wing-shaped plate is used for referencing the design concept of the injector, so that the forefinger and the middle finger of an operator can conveniently hook the front end of the wing-shaped plate, and the thumb or the palm is utilized to push the movable piece to move relative to the shell.

Further, the free ends of the two wing-shaped plates are provided with cambered surfaces which are bent towards the needle inserting direction, so that the anti-skid function is achieved; the connection part of the wing-shaped plate and the shell is provided with a reinforcing rib for improving the fixing strength of the wing-shaped plate.

The hair style can be further optimized, and a locking prompt mechanism is added. When the operator breaks away from the second limiting clamping groove with the second clamping mechanism, the movable piece moves for a long distance relative to the shell to the bottom, and the operator does not feel intuitively. Therefore, the inner wall of the shell is provided with a steel ball which can be partially accommodated in the first limit clamping groove or the second limit clamping groove and a top ball spring which continuously applies pressure to the steel ball towards the direction of the movable part. In the moving process of the movable piece, every other interval, the steel balls can partially fall into the first limit clamping groove or the second limit clamping groove, an operator can hear a click, and the hands have a click feel, so that the operator can conveniently judge the needle insertion distance.

The beneficial effects are that: the invention provides a control handle for effectively controlling and judging the needle insertion position and distance of a needle insertion guide tube, which can prevent the sheath tube from being excessively damaged by the needle retraction of a microwave ablation needle and provides an efficient, convenient and stable design for the operator.

Drawings

FIG. 1 is a schematic view of the assembly of the present invention;

FIG. 2 is a schematic longitudinal cross-sectional view of the housing and its interior of the control handle of the present invention;

FIG. 3 is a schematic perspective view of a moveable member;

FIG. 4 is a schematic longitudinal section of the moveable member at a distal limit distance relative to the housing and captured and restrained;

FIG. 5 is a schematic perspective view of a control handle of the present invention;

fig. 6 is a schematic longitudinal section along the broken line M of fig. 5.

Detailed Description

The invention will be further described with reference to the drawings and specific examples.

Example 1

As shown in fig. 1, the present embodiment provides a needle insertion control handle for an in-needle insertion catheter inserted in an endoscope working channel, the needle insertion catheter including a sheath 400 fixedly connected to a housing 100, and an inner catheter 300 connected to a movable member 200. The needle insertion control handle of the present embodiment includes a housing 100 and a movable member 200 in the housing 100, wherein a cable through hole 230 is provided in the movable member 200.

As shown in fig. 2 to 5, the movable member 200 is cylindrical, and a first limiting slot 210 and a plurality of second limiting slots 220 are formed on the surface of the movable member 200 at equal intervals; the first limit clamping groove 210 and the second limit clamping groove 220 are annular grooves, and chamfering is conducted at the notch; the first limiting slots 210 are located at the end of the movable member 200 in the needle insertion direction, and the plurality of second limiting slots 220 are sequentially arranged one by one toward the rear end. The distance between the adjacent second limiting slots 220 is generally between 0.5cm and 2cm, preferably 0.5cm, according to the requirement of needle insertion accuracy. The first limit slot 210 has a larger slot width than the second limit slot 220.

The housing 100 is provided with a first locking mechanism 500 and a second locking mechanism 600 which are vertically movable up and down with respect to the surface of the housing 100. The first locking mechanism 500 includes a first movable lever 510, a first locking member 520, and a first handle 530. The first locking member 520 is disposed inside the first movable rod 510, and the first handle 530 is disposed outside the movable rod and exposed on the surface of the housing 100. The second locking mechanism 600 includes a second movable lever 610, a second locking member 620, and a second handle 630. The second locking member 620 is disposed inside the second movable rod 610, and the second handle 630 is disposed outside the movable rod and exposed on the handle of the surface of the housing 100. The first movable rod 510 and the second movable rod 610 are respectively sleeved with

springs

540 and 640 in a pressing state, one end of each spring is propped against the inner wall of the shell 100, and the other end of each spring is fixed on the corresponding movable rod. The first locking member 520 and the second locking member 620 are arc structures matched with the limiting clamping groove, and in order to ensure the locking effect, chamfer designs are performed.

In order to ensure an effective locking effect, the length of the handle of the first locking mechanism 500 exposed on the surface of the housing 100 is not less than the depth of the first limiting slot 210; the length of the handle portion of the second locking mechanism 600 exposed on the surface of the housing 100 is not less than the depth of the second limiting slot 220.

After the locking mechanism is inserted into the limiting slot, the operator pulls the locking mechanism outwards, and the movable member 200 can move back and forth relative to the housing 100. When the movable member 200 moves for a certain distance, the second locking mechanism 600 corresponds to the second limiting slot 220, and at this time, under the action of the spring, the second locking member 620 is inserted into the corresponding second limiting slot 220, so as to prevent the movable member 200 from moving back and forth along the needle insertion direction.

When the operator pulls the movable member 200 to be located at a distal limit distance with respect to the housing 100 (as shown in fig. 4), the first locking mechanism 500 is engaged with the first limit slot 210; in order to prevent the first locking member 520 from being embedded into the second limiting groove 220, the width of the first limiting groove 210 should be larger than that of the second limiting groove 220.

Example 2

As shown in fig. 2 to 5, the present embodiment is based on embodiment 1, in which the second locking mechanism 600 is modified. The second locking mechanism 600 includes a second movable lever 610, a second locking member 620, a second handle 630, and an intermediate member 650. The second locking member 620 and the second handle 630 are respectively located at opposite sides of the movable member 200, and the second movable rod 610 and the second handle 630 are connected through an intermediate member 650.

The design changes the drawing mode into the pushing mode, and the operator can push the handle of the second locking mechanism 600 above the shell 100 by using the thumb, so that the locking piece of the second locking mechanism 600 can be separated from the second limiting clamping groove 220 at the lower side of the movable piece 200, and the operator can further pull or push the inner catheter 300 to move relative to the sheath 400 by using other parts of the palm.

As a preferred embodiment, the middle piece 650 is a near-elliptical ring-shaped part sleeved outside the movable piece 200, the inner side end of the handle of the second locking mechanism 600 is connected with the outer side surface of the middle piece 650, and the outer side end of the movable rod of the second locking mechanism 600 is connected with the inner side surface of the middle piece 650; the annular cavity of the intermediate member 650 includes a main body cavity portion corresponding to the sectional shape of the movable member 200, and a floating cavity portion 660 for the movable member 200 to swing.

The width of the floating cavity portion corresponds to the depth of the second limiting clamping groove 220, and is at least not smaller than the depth of the second limiting clamping groove 220. The length of the handle portion of the second locking mechanism 600 exposed on the surface of the housing 100 is not less than the depth of the second limiting slot 220. The length of the handle portion of the first locking mechanism 500 exposed on the surface of the housing 100 is not less than the depth of the first limiting slot 210.

Example 3

As shown in fig. 1, 5 and 6, in order to further improve the use experience, in the present embodiment, two wing plates 110 symmetric to each other with respect to the longitudinal section are disposed on the surface of the housing 100, and a wider side of the wing plate 110 is perpendicular to the needle insertion direction. The free ends of the two airfoil plates 110 are provided with cambered surfaces 112 which are bent towards the needle inserting direction, so as to play a role in skid resistance; the connection between the airfoil plate 110 and the housing 100 is provided with a reinforcing rib 114 for enhancing the fixing strength of the airfoil plate 110.

The design of the wing plate 110 is taken into consideration in the design concept of the syringe, so that the forefinger and the middle finger of the operator can conveniently hook the front end of the wing plate 110, and the thumb or the palm can be used for pushing the movable piece 200 to move relative to the shell 100.

Example 4

Referring to fig. 2 and 4, the present embodiment provides a prompt and judgment mechanism for the needle insertion position for the operator. The inner wall of the housing 100 is provided with a steel ball 126 which can be partially accommodated in the first limit clamping groove 210 or the second limit clamping groove 220, and a top ball spring 128 which continuously applies pressure to the steel ball 126 towards the moving part 200. During the movement of the movable member 200, the steel balls 126 will partially fall into the first limit slot 210 or the second limit slot 220 at intervals, so that the operator can hear a click, and the operator can feel a click on the hand, thereby facilitating the operator to determine the needle insertion distance. The steel ball 126 shown in fig. 4 just falls into the second limit clamping groove 210, and when the steel ball 126 is not clamped into the clamping groove, the steel ball slides on the outer side surface of the movable member 200, as shown in fig. 2.

The position of the steel ball 126 in the housing can be designed as desired. Preferably, the steel ball 126 and the first locking mechanism 600 are located at the same cross section, and are separately located at two opposite sides of the movable member. As can be seen in fig. 2 and 4, the steel ball 126 and the second locking mechanism 600 are disposed above the housing 100; the first locking mechanism 500 is located at the lower side of the housing 100. Referring to fig. 5 and 6, two wing plates 110 are disposed on the left and right sides of the housing 100, and form a cross-shaped design with the first locking mechanism 500 and the second locking mechanism 600, so that the operation of the operator is greatly facilitated.

The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.

Claims

1. The utility model provides a needle advance control handle, includes the movable part in casing and the casing, this handle is connected with the needle advance pipe, the needle advance pipe includes the sheath pipe with casing fixed connection, and the interior pipe of being connected with the movable part, its characterized in that:

the movable part is internally provided with a cable through hole, and the surface of the movable part is provided with a first limit clamping groove and a plurality of second limit clamping grooves which are equidistantly arranged at intervals;

the shell is provided with a first clamping mechanism and a second clamping mechanism which are vertical to the surface of the shell and can move up and down; when the movable piece moves for a certain long distance, the second clamping mechanism corresponds to the second limiting clamping groove; when the movable piece is positioned at a far-end limiting distance relative to the shell, the first clamping mechanism is matched with the first limiting clamping groove; the first clamping mechanism and the second clamping mechanism are provided with elastic pieces which are continuously extruded towards the inner side of the shell; the width of the first limit clamping groove is larger than that of the second limit clamping groove;

the first clamping mechanism and the second clamping mechanism comprise a movable rod, a clamping piece arranged on the inner side of the movable rod and a handle part which is arranged on the outer side of the movable rod and exposed on the surface of the shell;

the clamping piece and the handle part of the second clamping mechanism are respectively positioned at one side opposite to the movable piece, and the movable rod of the second clamping mechanism is connected with the handle part through an intermediate piece;

the middle piece is an annular part sleeved outside the movable piece, the inner side end of the handle part of the second clamping mechanism is connected with the outer side surface of the middle piece, and the outer side end of the movable rod of the second clamping mechanism is connected with the inner side surface of the middle piece; the annular cavity of the middle piece comprises a main body cavity part corresponding to the section shape of the movable piece and a floating cavity part for the movable piece to swing.

2. A needle insertion control handle as defined in claim 1, wherein: the movable rod is sleeved with a spring in an extrusion state, one end of the spring is propped against the inner wall of the shell, the other end of the spring is fixed on the movable rod, the movable piece is cylindrical, and the first limit clamping groove and the second limit clamping groove are annular grooves formed in the surface of the movable piece.

3. A needle insertion control handle as defined in claim 1, wherein: the width of the floating cavity part corresponds to the depth of the second limiting clamping groove, and the length of the handle part of the second clamping mechanism exposed on the surface of the shell is not smaller than the depth of the second limiting clamping groove.

4. A needle insertion control handle as defined in claim 1, wherein: the length of the handle part of the first clamping mechanism exposed on the surface of the shell is not smaller than the depth of the first limiting clamping groove.

5. A needle insertion control handle as defined in claim 1, wherein: the clamping pieces of the first clamping mechanism and the second clamping mechanism are arc-shaped structures.

6. A needle insertion control handle as defined in claim 5, wherein: the surface of the shell is provided with two wing-shaped plates which are bilaterally symmetrical relative to the longitudinal section, and the wider surface of each wing-shaped plate is perpendicular to the needle inserting direction.

7. A needle insertion control handle as defined in claim 6, wherein: the free ends of the two wing-shaped plates are provided with cambered surfaces which are bent towards the needle inserting direction; the joint of the wing-shaped plate and the shell is provided with a reinforcing rib.

8. A needle insertion control handle as defined in claim 1, wherein: the inner wall of the shell is provided with a steel ball which can be partially accommodated in the first limit clamping groove or the second limit clamping groove, and a ball ejection spring which continuously applies pressure to the steel ball towards the direction of the movable part.