Abdominal puncture needle cannula device

Abstract

The present invention relates to an abdominal puncture needle cannula device, comprising a cannula body with an interlayer, a limiting member installed in the interlayer, and a moving member, wherein two openings communicating with the interlayer are symmetrically provided along the vertical direction on the outer periphery of the lower part of the cannula body; the moving member comprises a sliding sleeve arranged at the lower end of the interlayer, and a push-pull rod arranged at the upper end of the interlayer; a limiting member is respectively arranged at each opening of the interlayer, and the limiting member comprises a rocking lever and a connecting rod connected in sequence, and the upper and lower ends of the rocking lever are respectively hinged to the upper end of the sliding sleeve and the upper end of the connecting rod, and the lower end of the connecting rod is hinged to the push-pull rod; a limiting stopper is arranged at the lower end of the push-pull rod for limiting the connecting rod; an annular protrusion is arranged on the side of the lower part of the interlayer, and an annular convex part cooperating with the annular protrusion is arranged on the peripheral side wall of the sliding sleeve, and the annular convex part is located below the annular protrusion; after puncture, the limiting member can be opened in the body of the device, and the cannula body can be fixed by cooperating with the limiting member through the external baffle plate, so as to prevent the puncture needle in the cannula body from being easily displaced during the operation.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, and in particular to a abdominal puncture needle cannula device. Background Art

[0002] Abdominal puncture is used to extract ascites and / or conduct laboratory tests. When abdominal puncture is performed to extract ascites, the puncture needle needs to be fixed after entering the abdominal cavity to avoid damage to abdominal organs and increase the incidence of complications. Currently, in clinical operations, the puncture needle is generally fixed with adhesive tape or vascular clamps. During the extraction process, the puncture needle is easy to shift and easily damage the patient's abdominal organs. Summary of the invention

[0003] The purpose of the present invention is to provide a abdominal puncture needle cannula device in view of the above shortcomings.

[0004] The solution adopted by the present invention to solve the technical problem is that a cannula device for abdominal puncture needles includes a cannula body with an interlayer, a limiter installed in the interlayer, and a moving part, wherein two openings communicating with the interlayer are vertically symmetrically formed on the outer periphery of the lower part of the cannula body;

[0005] The moving part comprises a sliding sleeve arranged at the lower end of the interlayer, and a push-pull rod arranged at the upper end of the interlayer and penetrating the interlayer;

[0006] The limiting member is provided at each opening of the interlayer, and the limiting member comprises a rocker and a connecting rod connected in sequence from top to bottom, the upper and lower ends of the rocker are respectively hinged to the upper end of the sliding sleeve and the upper end of the connecting rod, and the lower end of the connecting rod is hinged to the push-pull rod;

[0007] A plurality of positioning holes are vertically spaced apart on the push-pull rod, and a pin hole matching the positioning holes is radially formed on the outer circumference of the upper part of the sleeve, and a positioning pin is inserted into the pin hole;

[0008] The lower end of the push-pull rod is provided with a limit stop for limiting the connecting rod;

[0009] The lower side of the interlayer is provided with an annular protrusion, which is located below the opening;

[0010] The peripheral side wall of the sliding sleeve is provided with an annular protrusion matched with the annular protrusion, and the annular protrusion is located below the annular protrusion;

[0011] In the unfolded state, when the upper end of the connecting rod swings down until the connecting rod abuts against the limit stop, the connecting rod is horizontal, and the rod and the connecting rod extend out of the opening;

[0012] In the folded state, the connecting rod fits the push-pull rod, the rocker fits the connecting rod, the sliding sleeve is located at the bottom of the interlayer, the connecting end of the rocker and the connecting rod faces upward, and the rocker and the connecting rod do not extend out of the opening.

[0013] Furthermore, a slot for accommodating a connecting rod is provided at the lower end of the push-pull rod, and the lower end of the slot is hinged to the connecting rod via a transverse column; the limit stop is a semi-cylinder arranged at the outer end of the transverse column, and an axial hole for accommodating the transverse column is provided on the connecting rod, and a quarter-cylindrical stop protrusion cooperating with the semi-cylinder is provided on the inner wall of the axial hole.

[0014] Furthermore, the outer periphery of the upper portion of the sleeve is provided with an anti-slip texture.

[0015] Furthermore, a baffle is installed on the outer periphery of the upper end of the sleeve.

[0016] Furthermore, the upper end surface of the sleeve is covered with a closed clamping ring cover, and the push-pull rod passes through the ring cover.

[0017] A method for fixing a cannula for abdominal puncture operation: the puncture needle is installed in the cannula body, and during abdominal puncture, the cannula device for the intracavitary puncture needle is in a retracted state; after the puncture enters the body, the push-pull rod is pulled outward, and after the slide moves up to the annular convex part and abuts against the annular protrusion, the upper end of the connecting rod swings downward and unfolds under the action of the pulling force until the intracavitary puncture needle cannula device reaches the unfolded state, and the connecting rod and the push-pull rod form an angle of 90 degrees; then, the pulling force acting on the push-pull rod is increased so that the pulling force is greater than the maximum resistance that the annular protrusion can produce on the annular convex part, so that the slide continues to move upward through the annular protrusion, thereby realizing the unfolding of the connecting rod. Move; continue to pull the push rod outward to move the connecting rod to the desired limit position, insert the positioning pin into the sleeve body, fix the push-pull rod through the positioning pin, so that the limit piece is fixed, and then move the baffle on the upper part of the sleeve body to a suitable position, and fix the sleeve body with the limit piece; then perform abdominal surgery; after the abdominal surgery is completed, pull out the positioning pin, push the push-pull rod downward, so that the sliding sleeve moves back to its position, and at the same time the rocker and the connecting rod are also retracted and returned to the interlayer, so that the intracavitary puncture needle sleeve device is reset to the folded state; insert the positioning pin into the sleeve body, and after fixing the push-pull rod through the positioning pin, the intracavitary puncture needle sleeve device can be taken out.

[0018] Compared with the prior art, the present invention has the following beneficial effects: after puncture, the limiter can be opened in the body, and the sleeve body can be fixed by cooperating with the limiter through the external baffle, so as to prevent the puncture needle in the sleeve body from being easily displaced during the operation and damaging the patient's abdominal organs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a structural schematic diagram of the unfolded state of the device.

[0021] Figure 2 It is a structural schematic diagram of the folded state of the device.

[0022] Figure 3 for Figure 2AA cross-section diagram.

[0023] Figure 4 It is a schematic diagram of the connecting rod structure.

[0024] Figure 5 It is a schematic diagram of the structure of the push-pull rod.

[0025] Figure 6 It is a schematic diagram of the structure of the casing body.

[0026] Figure 7 It is a structural schematic diagram of the sleeve.

[0027] Figure 8 Expand the state diagram for the limiter.

[0028] In the figure: 1- sleeve body; 2- sliding sleeve; 3- rocker; 4- connecting rod; 5- push-pull rod; 6- baffle; 7- positioning pin; 8- ring cover. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] like Figure 1-8 As shown, a abdominal puncture needle cannula device comprises a cannula body 1 with an interlayer, a limiter and a moving part installed in the interlayer, and two openings communicating with the interlayer are vertically symmetrically formed on the outer periphery of the lower part of the cannula body;

[0031] The moving part comprises a sliding sleeve 2 arranged at the lower end of the interlayer, and a push-pull rod 4 arranged at the upper end of the interlayer and penetrating the interlayer;

[0032] The limiter is provided at each opening of the interlayer, and includes a rocker 3 and a connecting rod 4 connected in sequence from top to bottom. The upper and lower ends of the rocker are respectively hinged to the upper end of the sliding sleeve and the upper end of the connecting rod, and the lower end of the connecting rod is hinged to the push-pull rod.

[0033] A plurality of positioning holes are vertically spaced apart on the push-pull rod, and a pin hole matching the positioning holes is radially formed on the outer circumference of the upper part of the sleeve, and a positioning pin 7 is inserted into the pin hole;

[0034] The lower end of the push-pull rod is provided with a limit stop for limiting the connecting rod;

[0035] The lower side of the interlayer is provided with an annular protrusion, which is located below the opening;

[0036] The peripheral side wall of the sliding sleeve is provided with an annular protrusion matched with the annular protrusion, and the annular protrusion is located below the annular protrusion;

[0037] The arrangement of the annular convex part and the annular protrusion makes the sliding sleeve have a certain resistance at the beginning to ensure that the sliding sleeve continues to move after the rocker swings to form a limited plane at the first time of the push-pull rod movement;

[0038] In the unfolded state, when the upper end of the connecting rod swings down until the connecting rod abuts against the limit stop, the connecting rod is horizontal, and the rod and the connecting rod extend out of the opening;

[0039] In the folded state, the connecting rod fits the push-pull rod, the rocker fits the connecting rod, the sliding sleeve is located at the bottom of the interlayer, the connecting end of the rocker and the connecting rod faces upward, and the rocker and the connecting rod do not extend out of the opening.

[0040] In this embodiment, a slot for accommodating a connecting rod is provided at the lower end of the push-pull rod, and the lower end of the slot is hinged to the connecting rod via a transverse column; the limit stop is a semi-cylinder arranged at the outer end of the transverse column, and an axial hole for accommodating the transverse column is provided on the connecting rod, and a quarter-cylindrical stop protrusion cooperating with the semi-cylinder is provided on the inner wall of the axial hole.

[0041] In this embodiment, a baffle 6 is installed on the outer periphery of the upper end of the sleeve, and an anti-slip texture that can cooperate with the baffle is provided on the outer periphery of the upper end of the sleeve. The baffle is arranged on the anti-slip surface of the upper end of the sleeve and moves, thereby cooperating with the expanded limiting piece to fix and limit the sleeve body.

[0042] In this embodiment, the upper end surface of the sleeve is covered with a closed clamping ring cover 8, and the push-pull rod passes through the ring cover.

[0043] A method for fixing a cannula for abdominal puncture operation: the puncture needle is installed in the cannula body, and during abdominal puncture, the cannula device for the intracavitary puncture needle is in a retracted state; after the puncture enters the body, the push-pull rod is pulled outward, and after the slide moves up to the annular convex part and abuts against the annular protrusion, the upper end of the connecting rod swings downward and unfolds under the action of the pulling force until the intracavitary puncture needle cannula device reaches the unfolded state, and the connecting rod and the push-pull rod form an angle of 90 degrees; then, the pulling force acting on the push-pull rod is increased so that the pulling force is greater than the maximum resistance that the annular protrusion can produce on the annular convex part, so that the slide continues to move upward through the annular protrusion, thereby realizing the unfolding of the connecting rod. Move; continue to pull the push rod outward to move the connecting rod to the desired limit position, insert the positioning pin into the sleeve body, fix the push-pull rod through the positioning pin, so that the limit piece is fixed, and then move the baffle on the upper part of the sleeve body to a suitable position, and fix the sleeve body with the limit piece; then perform abdominal surgery; after the abdominal surgery is completed, pull out the positioning pin, push the push-pull rod downward, so that the sliding sleeve moves back to its position, and at the same time the rocker and the connecting rod are also retracted and returned to the interlayer, so that the intracavitary puncture needle sleeve device is reset to the folded state; insert the positioning pin into the sleeve body, and after fixing the push-pull rod through the positioning pin, the intracavitary puncture needle sleeve device can be taken out.

[0044] If this patent discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), or as: a non-detachable fixed connection (for example, riveting, welding). Of course, the fixed connection can also be replaced by an integrated structure (for example, manufactured by a casting process) (except when it is obviously impossible to use an integrated forming process).

[0045] In the description of this patent, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0046] The preferred embodiments listed above further illustrate the objectives, technical solutions and advantages of the present invention in detail. It should be understood that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A abdominal puncture needle cannula device, characterized in that: It comprises a sleeve body with an interlayer, a limiter installed in the interlayer, and a moving part, wherein the outer circumference of the lower part of the sleeve body is vertically symmetrically provided with two openings communicating with the interlayer; The moving part comprises a sliding sleeve arranged at the lower end of the interlayer, and a push-pull rod arranged at the upper end of the interlayer and penetrating the interlayer; The limiting member is provided at each opening of the interlayer, and the limiting member comprises a rocker and a connecting rod connected in sequence from top to bottom, the upper and lower ends of the rocker are respectively hinged to the upper end of the sliding sleeve and the upper end of the connecting rod, and the lower end of the connecting rod is hinged to the push-pull rod; A plurality of positioning holes are vertically spaced apart on the push-pull rod, and a pin hole matching the positioning holes is radially formed on the outer circumference of the upper part of the sleeve, and a positioning pin is inserted into the pin hole; The lower end of the push-pull rod is provided with a limit stop for limiting the connecting rod; The lower side of the interlayer is provided with an annular protrusion, which is located below the opening; The peripheral side wall of the sliding sleeve is provided with an annular protrusion matched with the annular protrusion, and the annular protrusion is located below the annular protrusion; In the unfolded state, when the upper end of the connecting rod swings down until the connecting rod abuts against the limit stop, the connecting rod is horizontal, and the rod and the connecting rod extend out of the opening. In the folded state, the connecting rod fits the push-pull rod, the rocker fits the connecting rod, the sliding sleeve is located at the bottom of the interlayer, the connecting end of the rocker and the connecting rod faces upward, and the rocker and the connecting rod do not extend out of the opening; The push-pull rod has a slot at the lower end thereof for accommodating the connecting rod, and the lower end of the slot is hinged to the connecting rod via a horizontal column; the limit stopper is a semi-cylinder arranged at the outer end of the horizontal column, and the connecting rod is provided with an axial hole for accommodating the horizontal column, and the inner wall of the axial hole is provided with a quarter-cylinder stopper convex matched with the semi-cylinder; A baffle is installed on the outer periphery of the upper end of the sleeve.

2. The abdominal puncture needle cannula device according to claim 1, characterized in that: The outer periphery of the upper part of the sleeve is provided with anti-skid texture.

3. The abdominal puncture needle cannula device according to claim 1, characterized in that: The upper end surface of the sleeve is covered with a closed clamping ring cover, and the push-pull rod passes through the ring cover.

4. A method for fixing a cannula for abdominal puncture operation, using the abdominal puncture needle cannula device according to claim 1, characterized in that: The puncture needle is installed in the sleeve body, and during abdominal puncture, the cavity puncture needle sleeve device is in a folded state; after puncturing into the body, the push-pull rod is pulled outward, and the slide moves up to the annular convex part and abuts against the annular protrusion. Under the action of the pulling force, the upper end of the connecting rod swings down and unfolds until the cavity puncture needle sleeve device reaches the unfolded state, and the connecting rod and the push-pull rod form an angle of 90 degrees; then the pulling force acting on the push-pull rod is increased, so that the pulling force is greater than the maximum resistance that the annular protrusion can produce on the annular convex part, so that the slide continues to move upward through the annular protrusion, thereby realizing the mobility of the unfolded connecting rod; When the push rod is continuously pulled outward to move the connecting rod to the desired limit position, a positioning pin is inserted into the sleeve body, and the push-pull rod is fixed by the positioning pin, so that the limit piece is fixed, and then the baffle plate on the upper part of the sleeve body is moved down to its position, and the sleeve body is fixed with the limit piece; then the abdominal surgery is performed; after the abdominal surgery is completed, the positioning pin is pulled out, and the push-pull rod is pushed downward to make the sliding sleeve move back to its position, and at the same time, the rocker and the connecting rod are also retracted and returned to the interlayer, so that the intracavitary puncture needle sleeve device is reset to the folded state; the positioning pin is inserted into the sleeve body, and after the push-pull rod is fixed by the positioning pin, the intracavitary puncture needle sleeve device can be taken out.

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