CN110075386B - Anti-overflow plug for indwelling needle and indwelling needle using same - Google Patents
Anti-overflow plug for indwelling needle and indwelling needle using same Download PDFInfo
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- CN110075386B CN110075386B CN201910496111.9A CN201910496111A CN110075386B CN 110075386 B CN110075386 B CN 110075386B CN 201910496111 A CN201910496111 A CN 201910496111A CN 110075386 B CN110075386 B CN 110075386B
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- soft rubber
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- rubber plug
- needle
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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- 239000000741 silica gel Substances 0.000 description 1
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Abstract
The anti-overflow plug for the indwelling needle comprises a soft rubber plug and a fixed seat, wherein the upper part of the soft rubber plug and the lower part of the soft rubber plug are both cylinders, the diameter of the upper part of the soft rubber plug is larger than that of the lower part of the soft rubber plug, the lower part of the soft rubber plug is provided with a needle hole matched with a puncture needle of the indwelling needle, the fixed seat is internally provided with a mounting hole, and the lower part of the soft rubber plug is arranged in the mounting hole of the fixed seat; the invention also discloses an indwelling needle using the anti-overflow plug, which comprises a hose seat, wherein the anti-overflow plug is arranged in the hose seat, the upper part of the hose plug is in interference fit with the hose seat, the fixed seat is in clearance fit with the hose seat, the outer wall of the fixed seat is provided with an annular boss, a first annular protruding part for shielding the annular boss is arranged in the hose seat, and the first annular protruding part is in tight fit with the end face of the annular boss. When the needle tip of the puncture needle is retracted into the anti-overflow plug, the invention reduces the wrapping force of the anti-overflow plug on the puncture needle under the condition that the side opening on the puncture needle is still positioned in the anti-overflow plug, thereby being convenient for the operation of medical staff.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an anti-overflow plug for an indwelling needle and the indwelling needle using the anti-overflow plug.
Background
In recent years, the application range of the venous indwelling needle is expanding, and the venous indwelling needle is widely used in various departments in clinic. The venous indwelling needle has some problems in clinical use, the resistance of medical staff operating the indwelling needle to withdraw the needle after successful puncture is relatively high, the main reason is the structure of the anti-overflow plug assembled in the catheter seat, the anti-overflow plug has the function of preventing blood and liquid medicine from flowing out of the catheter seat, the blood can flow into the catheter seat when the needle tip is used for puncturing a blood vessel at the front end of the puncture needle, the medical staff can observe blood return conveniently, the side opening cannot flow out of the blood when the needle tip is prevented from not withdrawing into the anti-overflow plug in the process of successfully withdrawing the puncture needle, otherwise, the risk of blood-borne diseases is easy to increase and the nursing difficulty is easy to increase. However, the excessively long size of the anti-overflow plug is too large for the wrapping force of the puncture needle, and is particularly obvious for the wrapping force of the puncture needle of the large-size indwelling needle, so that the operation experience of medical staff on the indwelling needle is poor.
Disclosure of Invention
The invention aims at: the utility model provides an keep somewhere needle that is used for keeping somewhere anti-overflow stopper and uses this anti-overflow stopper to keep somewhere, guarantees that the needle point of pjncture needle is moved back into the anti-overflow stopper, and under the circumstances that the side opening on the pjncture needle still is in the anti-overflow stopper, reduces the wrapping force of anti-overflow stopper to the pjncture needle, is convenient for medical personnel to operate.
The technical scheme adopted by the invention is as follows:
The utility model provides an anti-overflow stopper for keeping somewhere needle, includes soft plug and fixing base, and soft plug upper portion and soft plug lower part are the cylinder, and the diameter on soft plug upper portion is greater than the diameter on soft plug lower part, is equipped with the pinhole with keep somewhere the pjncture needle matched with of needle in soft plug lower part, is equipped with the mounting hole in the fixing base, and soft plug lower part is installed in the mounting hole of fixing base.
The mounting hole is the shoulder hole, and the mounting hole includes first hole and second hole, and the second hole is close to the bottom of soft plug, soft plug lower part and second hole interference fit.
A conical transition hole is arranged between the first hole and the second hole, one end of the transition hole close to the first hole is large, the soft rubber plug is in interference fit with the transition hole, the length of the lower portion of the soft rubber plug is denoted as f, the length of the interference fit between the lower portion of the soft rubber plug and the mounting hole is denoted as g, and the range of g is 0.2 f-0.35 f.
The mounting hole is a cylindrical hole, and the lower part of the soft rubber plug is in transition fit with the fixing seat.
The mounting hole is a cylindrical hole, and the lower part of the soft rubber plug is in interference fit with the fixed seat.
The mounting hole is a cylindrical hole, a second annular protruding portion is arranged at the lower portion of the soft rubber plug, the second annular protruding portion is in interference fit with the mounting hole, the length of the lower portion of the soft rubber plug is denoted as f, the length of the second annular protruding portion is denoted as h, and the range of h is 0.2f-0.35f.
The bottom of the second annular protruding portion is flush with the bottom of the soft rubber plug, and round corners are rounded at two ends of the second annular protruding portion.
The length of the needle hole extending to the upper part of the soft rubber plug is marked as i, the length of the needle hole on the upper part of the soft rubber plug is marked as j, and the range of j is 0.2 i-0.35 i.
An indwelling needle using the anti-overflow plug comprises a hose seat, and is characterized in that: the overflow-preventing plug is arranged in the hose seat, the upper part of the hose plug is in interference fit with the hose seat, the fixed seat is in clearance fit with the hose seat, the outer wall of the fixed seat is provided with an annular boss, the hose seat is internally provided with a first annular protruding part for shielding the annular boss, and the first annular protruding part is in tight fit with the end face of the annular boss in a propping manner
The first annular protruding portion is the taper, and the big low end in top of first annular protruding portion is little.
According to the invention, the mounting hole is formed in the fixing seat, the lower part of the soft rubber plug is mounted in the mounting hole of the fixing seat, so that the soft rubber plug is matched with the fixing seat, the lower part of the soft rubber plug is provided with the needle hole matched with the puncture needle of the indwelling needle, the wrapping force of the anti-overflow plug on the puncture needle is reduced, and the operation of medical staff is facilitated; the mounting hole is a stepped hole, the processing is convenient, the mounting hole comprises a first hole and a second hole, the second hole is close to the bottom of the soft rubber plug, the lower part of the soft rubber plug is in interference fit with the second hole, the fixing seat extrudes the interference fit part of the lower part of the soft rubber plug, and the wrapping force of the soft rubber plug on the puncture needle is increased; the transition hole plays a role in transition, so that the soft rubber plug can be conveniently installed.
The retention needle using the anti-overflow plug is characterized in that the upper part of the soft rubber plug is in interference fit with a hose seat, so that the wrapping force of the anti-overflow plug on the puncture needle is ensured, an annular boss is arranged on the outer wall of the fixed seat, a first annular boss for shielding the annular boss is arranged in the hose seat, and the first annular boss is in tight fit with the end face of the annular boss to limit the anti-overflow plug; the first annular protruding portion is conical, and assembly is convenient.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a partial cross-sectional view of FIG. 1;
FIG. 3 is a schematic view of the anti-lancing assembly of FIG. 2 shown extended and separated from a hose seat;
FIG. 4 is a schematic diagram of the structure of the present invention (II);
FIG. 5 is a schematic view of the anti-lancing assembly of FIG. 4 in an extended configuration;
FIG. 6 is a partial cross-sectional view of FIG. 5;
FIG. 7 is a schematic view of the structure of a soft gasket;
fig. 8 is a schematic structural view (one) of the soft rubber plug;
fig. 9 is a schematic structural view of the soft rubber plug (ii);
FIG. 10 is a schematic structural view of a fixing base;
FIG. 11 is a cross-sectional view of a mounting hole of a fixing base as a stepped hole;
Fig. 12 is a schematic structural view of one third to one fifth of the lower part of the soft rubber plug in interference fit with the fixing seat;
FIG. 13 is an enlarged partial schematic view of FIG. 12;
Fig. 14 is a schematic diagram showing the structure of the transition fit between the lower part of the soft rubber plug and the fixing seat;
FIG. 15 is an enlarged partial schematic view of FIG. 14;
FIG. 16 is a schematic view of the structure of the lower part of the soft rubber plug in interference fit with the fixed seat;
FIG. 17 is an enlarged partial schematic view of FIG. 16;
FIG. 18 is a schematic view of the structure of the second annular protrusion of the lower portion of the soft rubber plug in interference fit with the fixing seat;
fig. 19 is an enlarged partial schematic view of fig. 18.
Detailed Description
As shown in fig. 8-19, an anti-overflow plug for an indwelling needle comprises a soft rubber plug 14 and a fixed seat 15, wherein the upper part 14a of the soft rubber plug and the lower part 14b of the soft rubber plug are both cylinders, the diameter of the upper part 14a of the soft rubber plug is larger than that of the lower part 14b of the soft rubber plug, the whole soft rubber plug 14 is T-shaped, the lower part 14b of the soft rubber plug is provided with a needle hole 14d matched with the puncture needle 1 of the indwelling needle, the fixed seat 15 is internally provided with a mounting hole 15b, and the lower part 14b of the soft rubber plug is mounted in the mounting hole 15b of the fixed seat 15.
The upper part 14a of the soft rubber plug is a part with a larger outer diameter and is close to the needle tip of the puncture needle 1, and the lower part 14b of the soft rubber plug is a part with a smaller outer diameter and is close to the needle tail of the puncture needle 1.
As shown in fig. 11, 12 and 13, the mounting hole 15b is a stepped hole, which is convenient for processing, the mounting hole 15b includes a first hole 150 and a second hole 152, the second hole 152 is close to the bottom of the soft rubber plug 14, and the soft rubber plug lower portion 14b is in interference fit with the second hole 152.
A conical transition hole 151 is arranged between the first hole 150 and the second hole 152, one end of the transition hole 151 close to the first hole 150 is large, the soft rubber plug 14 is in interference fit with the transition hole 151, the transition hole 151 plays a role in transition, the soft rubber plug 14 is convenient to install, the length of the lower portion 14b of the soft rubber plug is marked as f, the length of the interference fit of the lower portion 14b of the soft rubber plug and the installation hole 15b is marked as g, the g range is 0.2 f-0.35 f, the extrusion force of the fixed seat 15 on the interference fit is large, the wrapping force of the soft rubber plug 14 on the puncture needle 1 is increased, the wrapping force of the soft rubber plug 14 on the puncture needle 1 is guaranteed, and blood outflow is avoided.
As shown in fig. 14 and 15, the mounting hole 15b is a cylindrical hole, and the lower portion 14b of the soft rubber plug is in transition fit with the fixing seat 15.
As shown in fig. 16 and 17, the mounting hole 15b is a cylindrical hole, and the lower portion 14b of the soft rubber plug is in interference fit with the fixing seat 15.
As shown in fig. 9, 18 and 19, the mounting hole 15b is a cylindrical hole, a second annular protruding portion 14c is provided at the lower portion 14b of the soft rubber plug, the second annular protruding portion 14c is in interference fit with the mounting hole 15b, the wrapping force of the soft rubber plug 14 on the puncture needle 1 is increased, the second annular protruding portion 14c is close to the bottom end of the soft rubber plug 14, the length of the lower portion 14b of the soft rubber plug is denoted as f, the length of the second annular protruding portion 14c is denoted as h, and the range of h is 0.2f-0.35f.
The bottom of the second annular protruding portion 14c is flush with the bottom of the soft rubber plug 14, and round corners are rounded at two ends of the second annular protruding portion 14c, so that the installation is facilitated.
The needle hole 14d extends to the upper part 14a of the soft rubber plug, the length of the upper part 14a of the soft rubber plug is marked as i, the length of the needle hole 14d on the upper part 14a of the soft rubber plug is marked as j, the range of j is 0.2 i-0.35 i, the wall of the needle hole 14d is tightly attached to the puncture needle 1, the outflow of blood is avoided, but the wrapping force of the anti-overflow plug on the puncture needle 1 is relatively reduced, and the operation of medical staff is facilitated.
The remaining needle using the anti-overflow plug comprises a hose seat 3, the anti-overflow plug is arranged in the hose seat 3, the upper part 14a of the hose plug is in interference fit with the hose seat 3, a fixed seat 15 is in clearance fit with the hose seat 3, an annular boss 15a is arranged on the outer wall of the fixed seat 15, a first annular boss 3a for shielding the annular boss 15a is arranged in the hose seat 3, and the first annular boss 3a is in tight fit with the end face of the annular boss 15a to limit the anti-overflow plug; the puncture needle 1 of the retention needle penetrates through the anti-overflow plug, the puncture needle 1 is matched with the needle hole 14d of the soft rubber plug 14, and the inner wall of the needle hole 14d wraps the puncture needle 1 so as to avoid blood outflow.
The first annular protruding portion 3a is conical, and the top end of the first annular protruding portion 3a is large, the bottom end is small, and assembly is convenient.
When the needle tip of the puncture needle 1 is retracted into the anti-overflow plug, the invention reduces the wrapping force of the anti-overflow plug on the puncture needle 1 under the condition that the side opening on the puncture needle 1 is still positioned in the anti-overflow plug, and is convenient for medical staff to operate.
As shown in fig. 1-19, a soft cushion 4 for preventing pressure sores is arranged on a hose seat 3 of an indwelling needle, the soft cushion 4 is used for reducing the probability of the indwelling needle being fixed on the surface of a patient for a long time to form pressure sores, the soft cushion 4 is made of soft materials, such as silica gel, the soft cushion 4 and the hose seat 3 can be integrally formed, and can also be adhered, clamped and other fixing modes, an anti-needling component is arranged at the bottom end of the hose seat 3 and used for preventing a medical staff from being pricked by a puncture needle 1 when the puncture needle 1 is withdrawn from the hose seat 3, and an indication structure for judging the needle withdrawal distance is arranged on the anti-needling component and used for judging the needle withdrawal distance.
The front end of the hose seat 3 is fixedly provided with an indwelling tube 2, the puncture needle 1 penetrates through the indwelling tube 2 and is exposed out of the indwelling tube 2, the side surface of the hose seat 3 is communicated with an infusion tube 11, a flow stopping clamp 12 is arranged on the infusion tube 11, the end part of the infusion tube 11 is connected with a tee joint 13, and a sterile cap is arranged on one connecting port of the tee joint 13.
The cushion piece 4 is provided with a plurality of through holes 5, the through holes 5 are used for ventilation, and the bottom of the cushion piece 4 is provided with a plurality of grooves 4a which are arranged at intervals.
The soft pad piece 4 is arranged at the position of the soft tube seat 3, which is contacted and fixed with the body surface of the human body, the width of the soft pad piece 4 is larger than the diameter of the soft tube seat 3, the contact area is increased, the pressure intensity is reduced, pressure sores are avoided to be formed locally, the soft pad piece 4 is symmetrically arranged about the central line of the soft tube seat 3, namely, the central line of the soft pad piece 4 coincides with the central line of the soft tube seat 3.
The anti-needling assembly comprises an inner sleeve 6, an outer sleeve 8 capable of moving along the inner sleeve 6 is sleeved on the inner sleeve 6, the outer sleeve 8 is sleeved outside the inner sleeve 6, the outer sleeve 8 can move along the outer wall of the inner sleeve 6, or the outer sleeve 8 is sleeved in the inner sleeve 6, the outer sleeve 8 can move along the inner wall of the inner sleeve 6, the inner sleeve 6 is connected with the bottom end of a hose seat 3, a puncture needle 1 is arranged in the outer sleeve 8, the puncture needle 1 sequentially penetrates through the inner sleeve 6 and the hose seat 3, and the bottom of the puncture needle 1 is fixedly connected with the outer sleeve 8.
A notch is arranged on the side surface of the top of the puncture needle 1 and is used for blood return, the bottom of the puncture needle 1 is closed, and when the bottom of the puncture needle 1 extends to the outer sleeve 8, the puncture needle is closed and fixed in a dispensing mode; when the bottom of the puncture needle 1 does not penetrate the bottom of the outer sleeve 8, the bottom of the outer sleeve 8 is used for sealing the bottom, which is the prior art and is not described herein.
The outer sleeve 8 is sleeved outside the inner sleeve 6 in the normal condition, the outer sleeve 8 can move along the outer wall of the inner sleeve 6, the middle part of the outer sleeve 8 is convenient to hold for operation, the outer sleeve 8 is convenient to move, and meanwhile the movement condition of the outer sleeve 8 is convenient to observe.
The inner sleeve 6 is provided with a plurality of bayonets, the bayonets are distributed along the circumferential direction of the inner sleeve 6, the outer sleeve 8 is provided with indication bosses 7 matched with the bayonets on the inner sleeve 6, the indication bosses 7 are 2-3 mm long and are arranged in the bayonets, when the puncture needle 1 is withdrawn after completion, the indication bosses 7 are withdrawn from the bayonets of the inner sleeve 6, the position can be observed when a clinical medical staff performs the operation step of retaining needle puncture to execute the needle withdrawal, and when the bosses are seen to withdraw from the bayonets of the inner sleeve 6, the step is completed, so that the observation is facilitated.
When outer tube 8 cover is established including the cover outside the sleeve pipe 6, bayonet socket sets up on the top of sleeve pipe 6, and instruction boss 7 sets up on the top of outer tube 8, and when outer tube 8 cover was established including the cover in the sleeve pipe 6, the bayonet socket sets up the bottom of sleeve pipe 6, and instruction boss 7 sets up the bottom at outer tube 8.
A middle sleeve 18 is arranged between the inner sleeve 6 and the outer sleeve 8, the inner sleeve 6 and the outer sleeve 8 are connected through the middle sleeve 18, the outer sleeve 8 can move along the middle sleeve 18, the middle sleeve 18 can move along the inner sleeve 6, the puncture needle 1 penetrates through the middle sleeve 18, and the middle sleeve 18 is arranged between the inner sleeve 6 and the outer sleeve 8, so that the overall length of the puncture-preventing assembly is reduced.
When the outer sleeve 8 is sleeved outside the inner sleeve 6, the inner sleeve 6 and the outer sleeve 8 are connected through the middle sleeve 18, the outer sleeve 8 can move along the outer wall of the middle sleeve 18, the middle sleeve 18 can move along the outer wall of the inner sleeve 6, and the puncture needle 1 penetrates through the middle sleeve 18; when the outer sleeve 8 is sleeved in the inner sleeve 6, the inner sleeve 6 and the outer sleeve 8 are connected through the middle sleeve 18, the outer sleeve 8 can move along the inner wall of the middle sleeve 18, the middle sleeve 18 can move along the inner wall of the inner sleeve 6, and the puncture needle 1 penetrates through the middle sleeve 18.
The inner sleeve 6, the middle sleeve 18 and the outer sleeve 8 are sleeved, and only simple change of the sleeved form belongs to the protection scope of the invention.
The bottom end of the middle sleeve 18 is provided with a middle limiting boss 18b, the top end of the middle sleeve 18 is provided with a middle clamping ring 18a, the top end of the outer sleeve 8 is provided with an outer clamping ring 8a matched with the middle limiting boss 18b, the bottom end of the inner sleeve 6 is provided with an inner limiting boss 6b matched with the middle clamping ring 18a, when the middle sleeve 18 moves to the bottom end of the inner sleeve 6, the middle clamping ring 18a is tightly propped against the end face of the inner limiting boss 6b, and when the outer sleeve 8 moves to the bottom end of the middle sleeve 18, the outer clamping ring 8a is tightly propped against the end face of the middle limiting boss 18 b.
When the outer sleeve 8 is sleeved outside the inner sleeve 6, the middle limiting boss 18b is arranged on the outer wall of the middle sleeve 18, the middle clamping ring 18a is arranged on the inner wall of the middle sleeve 18, the inner limiting boss 6b is arranged on the outer wall of the inner sleeve 6, and the outer clamping ring 8a is arranged on the inner wall of the outer sleeve 8; when the outer sleeve 8 is sleeved in the inner sleeve 6, the middle limiting boss 18b is arranged on the inner wall of the middle sleeve 18, the middle clamping ring 18a is arranged on the outer wall of the middle sleeve 18, the inner limiting boss 6b is arranged on the inner wall of the inner sleeve 6, and the outer clamping ring 8a is arranged on the outer wall of the outer sleeve 8.
The positions of the middle limiting boss 18b, the middle clamping ring 18a, the inner limiting boss 6b and the outer clamping ring 8a are simply replaced, and all belong to the protection scope of the invention.
The inner sleeve 6, the middle sleeve 18 and the outer sleeve 8 of the needling prevention assembly are used for wrapping the puncture needle 1 in the needle withdrawing process, so that the puncture needle 1 is prevented from being exposed, medical staff is prevented from being injured by puncture, and the middle sleeve 18 is arranged between the inner sleeve 6 and the outer sleeve 8, so that the overall length of the needling prevention assembly is reduced.
At least 1 baffle 16 is arranged in the inner sleeve 6, the baffle 16 is in clearance fit with the inner sleeve 6, the puncture needle 1 penetrates through the baffle 16 and is in clearance fit with the baffle 16, the baffle 16 is preferably a baffle 16 made of metal, the baffle 16 can also be made of other materials, the baffle 16 can be made of other shapes such as round, square and the like, when the number of the baffles 16 is 1, after the puncture needle 1 is extracted from the baffle 16, the baffle 16 falls and contacts with the bottom of the inner sleeve 6, the puncture needle 1 is not aligned with the holes of the baffle 16, thus the needle return is avoided, when the number of the baffles 16 is 2 or more, each baffle 16 is different in size, when the puncture needle 1 is extracted from the baffle 16, the baffle 16 falls and contacts with the bottom of the inner sleeve 6, the corresponding needle holes are not at the same height, the needle holes corresponding to each baffle 16 are not aligned, and the needle holes of the adjacent baffle 16 are blocked by one baffle 16, thus the needle return, namely, in the puncture needle 1 is blocked towards the hose seat 3; a stop block 17 for preventing the stop piece 16 from moving towards the bottom end of the inner sleeve 6 is arranged in the inner sleeve 6, and the stop block 17 is clamped or fixedly connected with the inner sleeve 6.
The inner sleeve 6 is sleeved on or embedded in the bottom end of the hose seat 3, the hose seat 3 is sequentially provided with an annular groove 3b and a plurality of first protruding parts 3c, the first protruding parts 3c are uniformly distributed at intervals along the circumferential direction of the hose seat 3, the end part of the inner sleeve 6 is provided with a second protruding part 6a matched with the annular groove 3b, and the annular groove 3b and the first protruding part 3c are used for limiting the inner sleeve 6, so that the inner sleeve 6 can be separated from the hose seat 3 under the action of certain force.
The outer sleeve 8 is provided with a symmetrical operating handle 9, the operating surface of the operating handle 9 is provided with a plurality of raised edges 10, and the raised edges 10 are used for increasing friction force and preventing slipping.
The operating handle 9 is reverse U-shaped, and the bottom of operating handle 9 and outer tube 8 fixed connection, operating handle 9 and outer tube 8 integrated into one piece.
A conventional operating handle 9 may be provided on one side of the outer sleeve 8.
The bottom end fixedly connected with transparent end cap 19 at outer tube 8, pjncture needle 1 runs through outer tube 8 and extends to in the end cap 19, pjncture needle 1 and end cap 19 clearance fit, there is the interval bottom of pjncture needle 1 and end cap 19's bottom, the bottom of pjncture needle 1 is opened, be equipped with the opening at the bottom of end cap 19, be fixed with the ventilated membrane 20 of being made by ventilative impermeable material in the opening department, ventilated membrane 20 can adopt the PTFE membrane to make, the back blood mode of this kind of setting form's stay needle is at pjncture needle 1's bottom back blood, do not have the opening in pjncture needle 1's of pjncture needle 1 top side, this kind of form is fit for with pjncture needle 1 that the diameter is less, reinforcing pjncture needle 1's anti bending resistance ability.
When the transparent end cap 19 is not arranged at the bottom end of the outer sleeve 8, the indwelling needle is used for blood return at the top of the puncture needle 1, i.e. an opening is arranged at the side surface of the top end of the puncture needle 1 for blood return.
When the novel multifunctional indwelling needle is used, the tourniquet is pricked, the needle protection cap is removed, the left and right loosening puncture needle 1 is used, the needle tip inclined plane is upwards to directly puncture veins at 15 to 30 degrees, the angle is reduced to 5 to 10 degrees after blood return is seen, the needle is continuously inserted for 2 millimeters, the puncture needle is withdrawn for 12 millimeters to 3 millimeters, when the needle is withdrawn, the opening is withdrawn through the observation indication boss 7, the puncture needle 1 is indicated to be withdrawn to the place, the needle holder fully feeds a catheter and the puncture needle 1 into a blood vessel, the tourniquet is loosened to open the speed regulator, the puncture needle 1 is completely withdrawn, when the puncture needle 1 is pulled out, the outer sleeve 8 is held, the outer sleeve 8 moves backwards along the wall of the middle sleeve 18, when the outer clamping tube is tightly propped against the middle limit boss 18b, the outer sleeve 8 drives the middle sleeve 18 to move backwards, the middle sleeve 18 is continuously moved backwards when the middle clamping ring 18a is tightly propped against the inner limit boss 6b, the outer sleeve 18 is continuously moved backwards, the middle sleeve 18 is driven by the outer sleeve 8, the middle sleeve 6 drives the inner sleeve 6 to move backwards, the inner sleeve 6 is separated from the catheter 1 by the needle holder, the needle holder is released from the needle 1, the puncture needle 1 is completely withdraws from the needle holder, the puncture needle 1 is prevented from being contacted with the skin of a patient by a patient, the patient by the patient, the patient is prevented from being injured by the puncture needle, and the patient by the soft pad, the patient is prevented from being in the soft patient, and the patient has the medical patient, and the patient has a patient, and the patient.
The front end or the top end or the front part of the part refers to one end of the part close to the needle point of the puncture needle, and the rear end or the bottom part of the part refers to one end of the part away from the needle point of the puncture needle; the terms "first", "second", and the like in the present invention do not have a specific meaning, and are merely for convenience of description and understanding.
The above embodiments are illustrative of the present invention, and not limiting, and any simple modifications of the present invention fall within the scope of the present invention.
Claims (9)
1. An anti-spill plug for an indwelling needle, characterized in that: the device comprises a soft rubber plug and a fixed seat, wherein the upper part of the soft rubber plug and the lower part of the soft rubber plug are both cylinders, the diameter of the upper part of the soft rubber plug is larger than that of the lower part of the soft rubber plug, the lower part of the soft rubber plug is provided with a needle hole matched with a puncture needle of an indwelling needle, a mounting hole is arranged in the fixed seat, and the lower part of the soft rubber plug is arranged in the mounting hole of the fixed seat; the lower part of the soft rubber plug is provided with a second annular bulge, the bottom of the second annular bulge is flush with the bottom of the soft rubber plug, and round corners are rounded at the two ends of the second annular bulge.
2. The spill-resistant plug for an indwelling needle according to claim 1, wherein: the mounting hole is the shoulder hole, and the mounting hole includes first hole and second hole, and the second hole is close to the bottom of soft plug, soft plug lower part and second hole interference fit.
3. The spill-resistant plug for an indwelling needle according to claim 2, wherein: a conical transition hole is arranged between the first hole and the second hole, one end of the transition hole close to the first hole is large, the soft rubber plug is in interference fit with the transition hole, the length of the lower portion of the soft rubber plug is denoted as f, the length of the interference fit between the lower portion of the soft rubber plug and the mounting hole is denoted as g, and the range of g is 0.2 f-0.35 f.
4. The spill-resistant plug for an indwelling needle according to claim 1, wherein: the mounting hole is a cylindrical hole, and the lower part of the soft rubber plug is in transition fit with the fixing seat.
5. The spill-resistant plug for an indwelling needle according to claim 1, wherein: the mounting hole is a cylindrical hole, and the lower part of the soft rubber plug is in interference fit with the fixed seat.
6. The spill-resistant plug for an indwelling needle according to claim 1, wherein: the mounting hole is a cylindrical hole, the second annular protruding portion is in interference fit with the mounting hole, the length of the lower portion of the soft rubber plug is marked as f, the length of the second annular protruding portion is marked as h, and the range of h is 0.2f-0.35f.
7. The spill-resistant plug for an indwelling needle according to claim 1, wherein: the length of the needle hole extending to the upper part of the soft rubber plug is marked as i, the length of the needle hole on the upper part of the soft rubber plug is marked as j, and the range of j is 0.2 i-0.35 i.
8. An indwelling needle using the spill-resistant plug of any one of claims 1 to 7, comprising a catheter hub, characterised in that: the anti-overflow stopper is installed in the hose seat, and soft plug upper portion and hose seat interference fit, fixing base and hose seat clearance fit are equipped with annular boss on the outer wall of fixing base, are equipped with the first annular bellying that is used for sheltering from annular boss in the hose seat, and first annular bellying is tight fit with the terminal surface top of annular boss.
9. The indwelling needle according to claim 8, wherein: the first annular protruding portion is the taper, and the big low end in top of first annular protruding portion is little.
Priority Applications (1)
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| CN201910496111.9A CN110075386B (en) | 2019-06-10 | Anti-overflow plug for indwelling needle and indwelling needle using same |
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| CN201910496111.9A CN110075386B (en) | 2019-06-10 | Anti-overflow plug for indwelling needle and indwelling needle using same |
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| CN110075386A CN110075386A (en) | 2019-08-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203539791U (en) * | 2013-10-01 | 2014-04-16 | 新乡市驼人医疗器械有限公司 | Novel low-resistance anti-overflow and anti-fouling component |
| CN211214739U (en) * | 2019-06-10 | 2020-08-11 | 河南驼人医疗器械集团有限公司 | Anti-overflow plug for indwelling needle and indwelling needle using same |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203539791U (en) * | 2013-10-01 | 2014-04-16 | 新乡市驼人医疗器械有限公司 | Novel low-resistance anti-overflow and anti-fouling component |
| CN211214739U (en) * | 2019-06-10 | 2020-08-11 | 河南驼人医疗器械集团有限公司 | Anti-overflow plug for indwelling needle and indwelling needle using same |
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