CN114762745A

CN114762745A - Anti-acupuncture mechanism and safe type vein indwelling needle

Info

Publication number: CN114762745A
Application number: CN202110036108.6A
Authority: CN
Inventors: 王国辉; 张传雷
Original assignee: Suzhou Linhwa Medical Devices Co ltd
Current assignee: Suzhou Linhwa Medical Devices Co ltd
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2022-07-19

Abstract

The invention discloses a needle-prick prevention mechanism and a safe type venous indwelling needle, which comprise a base, wherein the axis of the base is a through hole, two sides of the base are oppositely provided with a first clamping piece and a second clamping piece which have elasticity, the extending ends of the first clamping piece and the second clamping piece are respectively a first hook part and a second hook part which are bent inwards, and in an initial state, the first hook part and the second hook part are separated to form an interval; in the second state, the first hook part is abutted to the second hook part, the inner angles and the through holes of the first hook part and the second hook part are positioned on the same straight line, and the first hook part, the second hook part and the base are enclosed to form a locking area. The needle tube is respectively subjected to double sealing by the first hook part and the second hook part from two sides, and the needle tube can still be sealed by the first hook part after the second hook part fails, so that the needle tube is not exposed after retreating, and the purpose of safely using the remaining needle is achieved.

Description

Anti-acupuncture mechanism and safe type venous indwelling needle

Technical Field

The invention relates to the field of infusion instruments, in particular to a needle-prick prevention mechanism and a safe venous indwelling needle.

Background

In order to reduce the pain of patients caused by repeated venipuncture and the fear of injection, relieve the anxiety of family members, facilitate clinical medication, rescue medication of urgent and critical patients, relieve the workload of nurses and reduce the pain of patients, the venous indwelling needle is widely applied clinically.

The existing vein indwelling needle retreats after being used, the needle head is polluted by blood of a patient, medical workers are easily stabbed by the needle head to easily infect diseases when pulling away or cleaning the indwelling needle, and meanwhile, the exposed waste needle head easily causes environmental pollution in the environment, so that serious potential safety hazards exist. Therefore, the existing venous indwelling needle generally provides a needle head with an anti-acupuncture device, and the anti-acupuncture device generally provides an elastic sheet or a movable body to block the needle tube so that the needle tube cannot pass out again. However, the acupuncture-preventing device is not a closed structure, liquid medicine and blood of a patient can remain in the used needle tube, and when medical workers take the remaining needle, the liquid in the needle can flow out to cause secondary pollution; and a large part of the needle tube of the used indwelling needle is exposed outside, and the needle tube is extremely thin and is easy to break, so that potential safety hazards exist.

In order to solve the above problems, chinese patent CN201481960U discloses a safety type vein indwelling needle with a needle tip shielding assembly, wherein an elastic steel sheet in the needle tip shielding assembly bounces a blocking sheet to block a needle tube, so that the needle tube cannot penetrate out again, thereby preventing the medical staff from being injured by the needle. However, the elastic steel sheet is easy to lose elasticity, once the blocking piece cannot be bounced, the effect of blocking the needle tube from penetrating out again cannot be achieved, the function of preventing needle-stick injury is lost, and potential safety hazards exist.

Therefore, an indwelling needle which can ensure that the needle head is not exposed after the needle is withdrawn is urgently needed at present.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides an anti-acupuncture mechanism and a safe venous indwelling needle.

The purpose of the invention is realized by the following technical scheme:

the anti-acupuncture mechanism comprises a base, wherein the axis of the base is a through hole, a first clamping piece and a second clamping piece which are elastic are oppositely arranged on two sides of the base, the extending ends of the first clamping piece and the second clamping piece are respectively a first hook part and a second hook part which are bent inwards, and in an initial state, the first hook part and the second hook part are separated and form an interval; in the second state, the first hook part is abutted to the second hook part, the inner angles and the through holes of the first hook part and the second hook part are positioned on the same straight line, and the first hook part, the second hook part and the base are enclosed to form a locking area.

Preferably, the length of the first clamping piece is greater than that of the second clamping piece, and the tail end of the second hook part is abutted against the inner side of the first clamping piece.

Preferably, the first clamping piece is composed of the first hook portion and a first clamping arm, the second clamping piece is composed of the second hook portion and a second clamping arm, and the first clamping arm and the second clamping arm have elastic forces approaching to a center normal of the base so as to drive the first hook portion and the second hook portion to abut against each other.

Preferably, link up through first kink between first portion of colluding and the first arm lock, link up through the second kink between second portion of colluding and the second arm lock is colluded to the second, first kink and top second kink are all outwards buckled.

Preferably, the first bending part and the second bending part are symmetrically arranged relative to the center normal of the base.

Preferably, the widths of the first clamping arm and the second clamping arm are consistent, the widths of the first hook part and the second hook part are consistent, and the widths of the first clamping arm and the second clamping arm are smaller than the widths of the first hook part and the second hook part.

Preferably, the first clamping arm is provided with a clamping hook, the clamping hook is formed by bending part of the first clamping arm, and a hook part of the clamping hook is parallel to the base.

The safety type venous indwelling needle comprises a catheter seat, a catheter fixed at the far end of the catheter seat and used for transfusion, and a needle tube assembly at least comprising a needle tube seat and a needle tube, wherein the near end of the needle tube is inserted into the needle tube seat and fixed with each other, the needle tube seat is internally provided with the anti-acupuncture mechanism, the far end of the needle tube penetrates through the anti-acupuncture mechanism, the catheter seat is connected with the needle tube seat in an initial state, the far end of the needle tube penetrates through the perforation and extends out of the anti-acupuncture mechanism, and the first hook part and the second hook part are separated and are respectively abutted against the tube wall of the needle tube; in a second state, the catheter seat is separated from the needle tube seat, the first hook part and the second hook part are abutted, and the distal end of the needle tube is sealed in the locking area.

Preferably, a fixed seat is movably arranged in the needle tube seat, and the anti-acupuncture mechanism is fixedly arranged in the fixed seat through the clamping hook.

Preferably, the needle tube has a flat recess, the outer diameter of the flat recess is larger than the through hole, and the distance between the flat recess and the distal end of the needle tube is smaller than the distance between the second hook and the through hole.

The invention has the following beneficial effects:

1. the needle tube is respectively subjected to double sealing by the first hook part and the second hook part from two sides, so that the needle tube can still be sealed by the first hook part after the second hook part fails, the effectiveness and the reliability of the needle tube sealing by the needle prick prevention mechanism are improved, the needle tube is prevented from being exposed after being withdrawn, and the purpose of safely using the remaining needle is achieved;

2. the arrangement of the first bending part and the second bending part further improves the pressure of the first clamping arm and the second clamping arm on the first hook part and the second hook part so as to ensure that the first hook part and the second hook part are always kept in a clamping state;

3. the clamping hook is formed by the material of the first clamping arm, so that the material is saved, and the processing steps are simplified.

Drawings

The technical scheme of the invention is further explained by combining the accompanying drawings as follows:

FIG. 1: schematic view of the anti-needle stick mechanism of the present invention;

FIG. 2: the invention discloses a schematic diagram of an anti-needling mechanism in an initial state;

FIG. 3: the schematic diagram of the anti-needling mechanism in the second state;

FIG. 4: the invention discloses a schematic diagram of a safety type venous indwelling needle;

FIG. 5: the invention discloses a partial schematic diagram of a safety type venous indwelling needle;

FIG. 6: the invention discloses a sectional view of a safety type venous indwelling needle.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the accompanying drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art in light of these embodiments are intended to be within the scope of the present invention.

In the description of the embodiments, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiment, the operator is used as a reference, the direction close to the operator is a proximal end, and the direction far away from the operator is a distal end.

As shown in fig. 1 to 3, the present invention discloses a needle-prick prevention mechanism, which includes a base 1, wherein an axis of the base 1 is a through hole 101, two sides of the base 1 are oppositely provided with a first clip 2 and a second clip 3 having elasticity, extension ends of the first clip 2 and the second clip 3 are respectively a first hook 201 and a second hook 301 bent inward, in an initial state, the first hook 201 and the second hook 301 are separated, and a space is formed therebetween; in the second state, the first hook 201 abuts against the second hook 301, and an inner angle of the first hook 201 and the second hook 301 is aligned with the through hole 101. The first clamping piece 2 and the second clamping piece 3 are made of elastic materials, so that the first clamping piece 2 and the second clamping piece 3 can be driven by the elasticity of the first clamping piece and the second clamping piece to change from an initial state to a second state.

Specifically, as shown in fig. 2 and 3, the length of the first clip piece 2 is greater than that of the second clip piece 3, and the end of the second hook 301 abuts against the inner side of the first clip piece 2. In the second state, the first hook 201 wraps the second hook 301, so that the first hook 201, the second hook 301 and the base enclose a locking region 100. In other possible embodiments, the length of the first clip 2 can be smaller than that of the second clip 3, so that the first hook 201 abuts against the inner side of the second clip 3.

As shown in fig. 1 to 3, the first clip 2 is composed of the first hook 201 and the first clip arm 202, the second clip 3 is composed of the second hook 301 and the second clip arm 302, and the first clip arm 202 and the second clip arm 302 have elastic force approaching to the center normal of the base 1 to drive the first hook 201 and the second hook 301 to abut against each other and keep the first hook 201 and the second hook 301 in a clamped state.

Further, the first hook 201 and the first clip arm 202 are connected by a first bending portion 203, the second hook 301 and the second clip arm 302 are connected by a second bending portion 303, and the first bending portion 203 and the second bending portion 303 at the top end are both bent outwards. The outward extending inclination angles of the first bending portion 203 and the second bending portion 303 are greater than the inclination angles of the first clamping arm 301 and the second clamping arm 302, so that when the first hooking portion 201 and the second hooking portion 301 are engaged, the elastic force applied to the first hooking portion 201 and the second hooking portion 301 can be increased, the elastic force applied to the first hooking portion 201 and the second hooking portion 301 is greater than the elastic force applied to the first clamping arm 202 and the second clamping arm 302, the clamping between the first hooking portion 201 and the second hooking portion 301 is further enhanced, and the first hooking portion 201 and the second hooking portion 301 can be kept in the second state under the condition that no other component exists between the first hooking portion 201 and the second hooking portion 301, so that the closing of the locking area 100 is ensured.

In the preferred embodiment, the first bending portion 203 and the second bending portion 303 are symmetrically disposed relative to a normal of the center of the base 1, so as to keep the elastic forces applied to the first hook 201 and the second hook 301 consistent. Of course, in other possible embodiments, the first bending portion 203 and the second bending portion 303 may also be disposed asymmetrically.

As shown in fig. 1, in order to save the manufacturing cost, the widths of the first clip arm 202 and the second clip arm 302 are the same, the widths of the first hook 201 and the second hook 301 are the same, and the widths of the first clip arm 202 and the second clip arm 302 are smaller than the widths of the first hook 201 and the second hook 301. The width of the first hook 201 and the second hook 301 is equal to the inner diameter of the needle tube seat, so as to ensure that the locking area 100 formed by the first hook and the second hook and the base 1 can lock the needle tube 6.

In order to prevent the needle tube 6 from passing out of the locking region 100 again, the inner angle of the first hook 201 and the second hook 301 is preferably 90 °. In other possible embodiments, the inner angle of the first hook 201 and the second hook 301 may be other suitable angles.

As shown in fig. 1, the second clamping arm 302 has a hook 304, the hook 304 is formed by bending a portion of the second clamping arm 302, and a hook portion of the hook 304 is parallel to the base 1. Such an arrangement can further save material and simplify the manufacturing process. In other possible embodiments, the hook 304 may be fixedly connected to the second clamping arm 302 by other suitable means. In other possible embodiments, the hook 304 may also be disposed on the first clamping arm 202.

As shown in fig. 4 to 6, the present invention further discloses a safety type venous indwelling needle, a catheter assembly and a needle tube assembly which are connected with each other, wherein the catheter assembly comprises a catheter holder 4 and a catheter fixed at the distal end thereof for transfusion, the needle tube assembly at least comprises a needle tube holder 5 and a needle tube 6, the proximal end of the needle tube 6 is inserted into the needle tube holder 5 and fixed with each other, the needle-prick prevention mechanism is arranged inside the needle tube holder 5, the distal end of the needle tube 6 passes through the needle-prick prevention mechanism, in an initial state, the catheter holder 4 is connected with the needle tube holder 5, the distal end of the needle tube 6 passes through the through hole 101 and extends out of the needle-prick prevention mechanism, and the first hook 201 and the second hook 301 are separated and are respectively abutted against the tube wall of the needle tube 6; in the second state, the catheter hub 4 and the needle hub 5 are separated, the first hook 201 and the second hook 301 are abutted, and the distal end of the needle tube 6 is enclosed in the locking region 100.

As shown in fig. 5, the needle tube seat 5 is detachably connected to the catheter seat 4 through a buckle 8, a fixing seat 501 is movably disposed in the needle tube seat 5, the anti-needle-stick mechanism is fixedly disposed in the fixing seat 501 through the hook 204, further, the base 1 is fixedly disposed in the fixing seat 501, an inner contour of the fixing seat 501 is matched with outer contours of the first clamping arm 203 and the second clamping arm 303, so that the anti-needle-stick mechanism is embedded in the fixing seat 501.

In order to avoid the needle stick prevention mechanism from moving back synchronously with the needle tube base 5, the fixed seat 501 is not attached to the inner wall of the needle tube base 5, and in order to avoid the fixed seat 501 from being attached to the needle tube base 5, a vent hole 502 is formed in the side wall of the fixed seat 501.

Further, the bottom of catheter seat 4 is provided with sealing plug 7, sealing plug 7 is sealed catheter seat 4, the bottom of sealing plug 7 have with first portion 201, the second portion 301 assorted recess 701 that colludes, make catheter seat 4 with when needle tube seat 5 is connected, first portion 201, the second portion 301 that colludes inlay in the recess 701, further shorten catheter seat 4 with the length after needle tube seat 5 connects, retrench the structure that the needle was kept somewhere to whole safe type vein.

As shown in fig. 2, 3 and 6, the needle tube 6 has a flat recess 601, and the outer diameter of the flat recess 601 is larger than the through hole 101, and the distance between the flat recess 601 and the distal end of the needle tube 6 is smaller than the distance between the second hook 301 and the through hole 101. The structure is such that when the flat concave 601 abuts against the through hole 101 during the retraction of the needle tube 6, the distal tip of the needle tube 6 is blocked in the locking area 100, and the needle tube 6 separates the needle-prick prevention component from the catheter hub 4 and drives the needle-prick prevention component to retract together while the operator continues to retract the needle tube 6.

In addition, in order to facilitate daily practical operation of the medical staff, a handle 503 is provided on a side portion of the needle hub 5.

The working principle of the invention is as follows:

firstly, a needle tube seat 5 is connected with a catheter seat 4, the distal end of a needle tube 6 penetrates through a needle stick prevention mechanism and a sealing plug 7 and extends into the catheter, and at the moment, a first hook part 201 and a second hook part 301 are respectively abutted against the needle tube 6;

secondly, the catheter and needle tube 6 are inserted into the blood vessel of the patient;

then, the handle 501 is grasped and the needle tube 6 is withdrawn backwards until the needle tube 6 drives the needle stick prevention mechanism together to separate from the catheter hub 4;

finally, the distal end of the needle cannula 6 is sealed off within the sealing zone 100.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. Prevent acupuncture mechanism, its characterized in that: the clamping device comprises a base (1), wherein a through hole (101) is formed in the axis of the base (1), a first clamping piece (2) and a second clamping piece (3) which are elastic are oppositely arranged on two sides of the base (1), the extending ends of the first clamping piece (2) and the second clamping piece (3) are respectively a first hook part (201) and a second hook part (301) which are bent inwards, and in an initial state, the first hook part (201) and the second hook part (301) are separated to form an interval; in a second state, the first hook part (201) is abutted to the second hook part (301), the inner angles of the first hook part (201) and the second hook part (301) and the through hole (101) are located on the same straight line, and the first hook part (201), the second hook part (301) and the base (1) enclose a locking area (100).

2. The anti-needlestick mechanism of claim 1, wherein: the length of the first clamping piece (2) is larger than that of the second clamping piece (3), and the tail end of the second hook part (301) is abutted against the inner side of the first clamping piece (2).

3. The anti-needlestick mechanism of claim 2, wherein: the first clamping piece (2) is composed of a first hook part (201) and a first clamping arm (202), the second clamping piece (3) is composed of a second hook part (301) and a second clamping arm (302), and the first clamping arm (202) and the second clamping arm (302) have elasticity close to the center normal of the base (1) to drive the first hook part (201) and the second hook part (301) to abut.

4. The anti-needlestick mechanism of claim 3, wherein: the first hook part (201) is connected with the first clamping arm (202) through a first bending part (203), the second hook part (301) is connected with the second clamping arm (302) through a second bending part (303), and the first bending part (203) and the top end second bending part (303) are bent outwards.

5. The anti-needlestick mechanism of claim 4, wherein: the first bending part (203) and the second bending part (303) are symmetrically arranged relative to the center normal of the base (1).

6. The anti-needlestick mechanism of claim 3, wherein: the widths of the first clamping arm (202) and the second clamping arm (302) are consistent, the widths of the first hook part (201) and the second hook part (301) are consistent, and the widths of the first clamping arm (202) and the second clamping arm (302) are smaller than the widths of the first hook part (201) and the second hook part (301).

7. The anti-needlestick mechanism of claim 6, wherein: the second clamping arm (302) is provided with a clamping hook (304), the clamping hook (304) is formed by bending part of the second clamping arm (302), and a hook part of the clamping hook (304) is parallel to the base (1).

8. Needle, interconnect's catheter subassembly and needle tubing subassembly are kept somewhere to safe type vein, the catheter subassembly includes pipe seat (4) and fixes at its distal end, the pipe that is used for the infusion, the needle tubing subassembly includes needle tube seat (5) and needle tubing (6) at least, the near-end of needle tubing (6) is inserted and is located in needle tube seat (5) and reciprocal anchorage, its characterized in that: the needle tube seat (5) is internally provided with the needle puncture preventing mechanism as claimed in any one of claims 1 to 5, the distal end of the needle tube (6) penetrates through the needle puncture preventing mechanism, the catheter seat (4) and the needle tube seat (5) are connected in an initial state, the distal end of the needle tube (6) penetrates through the through hole (101) and extends out of the needle puncture preventing mechanism, and the first hook part (201) and the second hook part (301) are separated and are respectively abutted against the tube wall of the needle tube (6); in a second state, the catheter seat (4) is separated from the needle tube seat (5), the first hook part (201) is abutted to the second hook part (301), and the distal end of the needle tube (6) is sealed in the locking area (100).

9. The safety type venous indwelling needle of claim 8, wherein: a fixed seat (501) is movably arranged in the needle tube seat (5), and the anti-acupuncture mechanism is fixedly arranged in the fixed seat (501) through the clamping hook (204).

10. The safety type venous indwelling needle of claim 8, wherein: the needle tube (6) is provided with a flat concave part (601), the outer diameter of the flat concave part (601) is larger than that of the perforation (101), and the distance between the flat concave part (601) and the distal end of the needle tube (6) is smaller than that between the second hook part (301) and the perforation (101).