WO2016179795A1

WO2016179795A1 - Open catheter needle with slotted protection sleeve

Info

Publication number: WO2016179795A1
Application number: PCT/CN2015/078761
Authority: WO
Inventors: 陈永曦
Original assignee: 福建省百仕韦医用高分子股份有限公司
Priority date: 2015-05-12
Filing date: 2015-05-12
Publication date: 2016-11-17
Also published as: CN107530491A

Abstract

A medical instrument suitable for intravascular application, and particularly an open catheter needle with slotted protection sleeve for preventing a needle puncture wound and blood contamination in clinical medicine. A needle base (3.1) is connected to an operation tab or an operation lug (3.1.2.1) by a guiding and connecting rib (3.1.3). A needle tube protection sleeve (1) is an elongated hollow housing. A side wall or two corresponding side walls have a sliding slot (1.1.1) of a certain length. The needle tube protection sleeve is sleeved into the needle base from the back end of the catheter needle and slides forward until a back engagement device between the two engages and connects, and at this point, the needle protection sleeve completely covers the needle tip. The needle tube protection sleeve is pulled backward to disengage from the back engagement device until a projecting fastener achieves a front engagement with the needle base, preventing the needle protection sleeve from moving backward. After puncture, a needle tube assembly moves relative to the needle tube protection sleeve and moves backward into the needle tube protection sleeve until the back engagement device engages again, and at this point, the needle tube protection sleeve completely covers the needle tip again. An advantage of the present invention is that it provides an effective timely protection for the needle tube and the needle tip and prevents accidental injury and blood contamination, and thus the present invention has great practical use and is therefore easy to market.

Description

Open retaining needle for slotted protective sleeve

Technical field

The invention relates to a medical device suitable for use in an intravascular, in particular to an open indwelling needle of a slotted protective cover for preventing needle tip stab wounds and preventing blood pollution in clinical medical treatment.

Background technique

In order to smoothly place the catheter into the patient's blood vessels in clinical practice, a variety of puncture techniques have been applied in clinical medicine, one of which is an open indwelling needle with a protective sleeve, the structure of which is shown in Figure 1. The indwelling needle is composed of a needle guard 1, a catheter assembly 2, a puncture needle assembly 3 and a venting plug group 4. Before the puncture, the needle protector 1 should be removed and placed aside. After the puncture is successfully placed, the blood vessel should be pressed by hand, and then the puncture needle should be withdrawn. After the infusion set is inserted at the back end of the needle cannula, release it. The hand that holds the blood vessel. Since the protective sleeve is detached from the needle seat at the time of puncture, the needle tip that is withdrawn after the puncture is missing protection. If the protective sleeve is returned to the needle holder, it is dangerous and may stab itself, so the medical staff will usually use the puncture for withdrawal. The needle tube is placed directly into the waste box, so that the needle tube and the needle tip are directly exposed without protection. When the medical staff cleans and destroys the used needle tube assembly, it is easy to accidentally stab the person and be threatened by the infectious disease, and at the same time, the needle tube is brought inside. Blood can also pollute the environment.

Summary of the invention

The object of the present invention is to overcome the deficiencies in the prior art, and to provide an open type indwelling needle for a slotted protective cover which can cover a needle tube before and after puncture use, and can prevent stab wounds and blood contamination of the needle tube.

The object of the present invention is achieved by the following means:

Open-type indwelling needle for slotted protective sleeve, including needle guard, catheter assembly, puncture needle and vent plug assembly, with operating flaps or levers fixed on the needle seat, venting impervious vent assembly In the rear part of the needle seat, the indwelling channel is located in the inner core of the catheter hub, and the main point of the composition is that the needle seat is connected to the operating flap or the operating latch through the guiding connecting rib, and the needle protecting sleeve is an elongated hollow shell and a side wall. Or the corresponding two side walls have a sliding slot of a certain length, the front end of the sliding slot is open, and the slot corresponds to the guiding connecting rib and can accommodate the guiding connecting rib, and the needle protective sleeve is inserted into the needle seat from the rear end of the indwelling needle and Slide forward until the rear contact device between the two is snap-fitted. At this time, the needle protector completely shields the needle tip. At the front end of the needle protector, a convex card protruding from the inner wall is fixed, and the needle guard is pulled backward. The rear card contact device is out of the touch and straight When the convex card and the needle seat are in contact with each other, the card is caught and stopped. After the puncture, the needle tube assembly separated from the catheter assembly moves relative to the needle protection sleeve and is retracted into the needle protection sleeve until the rear card contact device is again engaged with the needle. The tube cover completely obscures the tip of the needle again.

In this way, when the puncture is performed, the needle protection sleeve is pulled backward, the rear card contact device is disengaged from the card, and the hand-held operation flap is provided with the needle tube assembly, the catheter assembly and the card after the convex card and the needle holder are engaged and formed before the card is caught and stopped. The needle guard that touches the back of the needle assembly is synchronized forward to perform the puncture operation. When the catheter is successfully placed, pull the needle holder backward, withdraw the needle tube assembly and let the needle tube re-enter into the needle tube protective sleeve. At this time, the needle tube is completely covered by the sleeve, preventing accidental injury and blood pollution in the subsequent treatment of the needle tube. .

During the sliding of the needle hub assembly relative to the needle guard, the guiding link is slid along the sliding slot, the sliding slot acts both to accommodate the guiding link and to guide.

The object of the present invention can also be achieved by the following means.

When the sliding slot is disposed on one side, the sliding slot has a rear end or a blind resistance or an opening. When the sliding slot is disposed on both sides, the sliding slot has a blind end.

The utility model further comprises a needle holder contact device, wherein the needle holder contact device is located between the needle tube seat and the needle protection sleeve, and the needle holder contact device is snap-connected when the front card contact device is snapped.

In this way, when the catheter is successfully placed, the tube holder is pressed and the barrel or the flap is pulled backward. Due to the resistance of the needle holder, the withdrawal of the needle assembly is reversed relative to the needle holder and the sheath protection sleeve. Move until the needle tube is retracted into the needle tube protective sleeve and completely obscured by the needle tube and the rear card contact device is again snapped. Then, the needle tube protective sleeve is pulled back to pull the needle tube holder to disengage, and the needle holder is completed. The needle guard is detached from the needle hub. In this way, the needle tip is never exposed and safer throughout the operation.

The card touch device constituting the front and rear snap devices and the needle seat chucking device is used for reminding the position of the stroke position and temporary positioning and fixing between the two. In the prior art, the specific card touch device is more common, and the following Is a more appropriate one:

The rear card contact device is composed of a matching convex card point and a groove, and the convex card point and the groove are respectively located on the needle tube protective sleeve and the corresponding card contact member, and the card contact member is either a needle seat or an operation flap. Or it is a guide connecting rib.

The front card contact device is composed of a limit ring and a corresponding outer step on the needle seat or the needle tube seat corresponding to the contact ring of the limit ring, and the limit ring is fixed to the needle tube after the needle seat assembly is installed into the needle tube protective cover. The front end of the protective sleeve and the inner shape of the needle guard Inward steps, this step is a kind of convex card.

The needle holder clamping device is composed of a matching convex card point and a groove, and the convex card point and the groove are respectively located on the needle tube protective sleeve and the needle tube seat.

Also included is an end cap that is plugged into the front end of the needle guard.

The end cap is used to shield the tip of the needle on the end face.

The sleeve as the needle protective sleeve is a thin cylindrical shell, and a rectangular slit of a certain width is opened on one side, the slot is slidingly matched with the guiding connecting rib on the needle seat, one end of the slot is opened, and the limiting ring is installed in the needle hub assembly into the needle tube. After the protective sleeve is fixed, the front end portion of the needle protective sleeve is fixed and an inner step is formed in the inner cavity of the needle protective sleeve, and a convex card is arranged inside the slot at the rear end of the slot, and the convex card is either single or opposite. The front and rear end faces of the convex card are inclined at an acute angle, which makes it easier to slide out the corresponding groove on the needle seat when pushing, the convex card is the convex card of the rear card contact device, and the needle seat in the puncture needle tube assembly is made of transparent material. The utility model is composed of a stepped tower-shaped needle seat main body, a cylindrical shell with an axial notch coaxial therewith, and a guiding connecting rib connecting the two, and the outer side of the cylindrical shell is symmetrically arranged with a puncture operation pinch, and the stepped tower-shaped needle seat front end The stepped surface and the inner step formed by the limiting ring at the front end of the protective sleeve are snapped back to form a front latching device, and the largest outer peripheral surface of the stepped tower-shaped needle seat is slidably matched with the cylindrical surface of the protective sleeve inner cavity, and the guiding rib is set up and down symmetrically slide The radial width of the sliding groove is matched with the wall thickness of the protective sleeve, and a groove is arranged at the bottom of the sliding groove at the front end of the sliding groove near the needle tube, and the groove size is matched with the convex card of the rear clamping device of the protective cover to form a rear card contact device. .

The outer side wall of the tail end of the needle guard sleeve is symmetrically disposed with a pull operation lug.

This makes it easy to pull the needle guard back.

In summary, the present invention has the following advantages over the prior art: after the indwelling needle is used, the needle tube and the needle tip can be effectively protected in real time, preventing accidental injury and blood pollution to the environment during subsequent processing of the needle tube, and The structure of the existing puncture needle and the puncture use mode are basically unchanged, and the utility model is strong, and is convenient for popularization and application.

DRAWINGS

1 is a schematic view showing the structure of an open type indwelling needle in the prior art;

Figure 2 is a schematic cross-sectional perspective view showing the structure of an open indwelling needle of a slot type protective cover according to a preferred embodiment of the present invention;

Figure 3 is a schematic cross-sectional view showing the structure of an open indwelling needle of a slot type protective cover according to a preferred embodiment of the present invention;

4 is a schematic view showing the structure of a needle guard in an open indwelling needle of a slot type protective cover according to a preferred embodiment of the present invention; Stereogram

Figure 5 is a schematic perspective view showing the structure of a needle guard in an open indwelling needle of a slot type protective cover according to a preferred embodiment of the present invention;

Figure 6 is a schematic perspective cross-sectional view showing the structure of a needle guard in an open indwelling needle of a slot type protective cover according to a preferred embodiment of the present invention;

Figure 7 is a schematic perspective view showing the structure of a retaining ring of an open indwelling needle of a slot type protective cover according to a preferred embodiment of the present invention;

Figure 8 is a schematic perspective cross-sectional view showing the structure of a retaining ring in an open indwelling needle of a slot type protective cover according to a preferred embodiment of the present invention;

Figure 9 is a schematic perspective view showing the structure of an open indwelling needle middle end cap of a slot type protective cover according to a preferred embodiment of the present invention;

Figure 10 is a schematic perspective view showing the structure of a needle holder in an open indwelling needle of a slot type protective cover according to a preferred embodiment of the present invention;

Figure 11 is a schematic perspective cross-sectional view showing the structure of a needle holder in an open type indwelling needle of a slot type protective cover according to a preferred embodiment of the present invention;

Figure 12 is a schematic perspective cross-sectional view showing the structure of a needle holder in an open indwelling needle of a slot type protective cover according to a preferred embodiment of the present invention;

Figure 13 is a schematic perspective view showing the structure of the open indwelling needle of the slot type protective cover in the preferred embodiment of the present invention, in which the needle guard is retracted to the puncture state.

The invention will be further elucidated below with reference to the accompanying drawings.

detailed description

Best embodiment:

Referring to Figures 2, 3 and 13, the open indwelling needle of the slotted protective cover is comprised of a needle guard 1, a catheter assembly 2, a puncture needle assembly 3 and a gas permeable, watertight venting plug 4. The needle protective sleeve 1 is composed of a sleeve 1.1, an end cover 1.2 and a front end limiting ring 1.3. The limiting ring 1.3 is fixed to the step inside the front end of the protective sleeve, and the end cover 1.2 is sleeved at the front end before the indwelling needle is not used. Needle tip shielding. After the catheter assembly, the puncture needle assembly and the vent plug are assembled, they are inserted from the front end opening of the protective sleeve, and the guiding connecting ribs 3.1.3 on the needle seat 3.1 are passed into the slot of the protective sleeve on the protective slot 1.1.1, sliding all the way to the guiding rib The groove is in contact with the elastic convex card 1.1.2 on the slot, and then the limit ring is inserted into the front end of the sleeve and fixed to the inner step. The end of the sleeve is then placed over the end cap. A venting impervious vent assembly is mounted to the rear of the hub and the indwelling channel is located within the catheter hub core.

Referring to FIG. 4, FIG. 5 and FIG. 6, the sleeve as the sheath protection sleeve is a thin cylindrical shell, and a rectangular slit of a certain width is opened on one side, 1.1.1, the slot 1.1.1 and the guide connecting rib on the needle seat 3.1. 3 sliding matching, the slot is open at one end, and the limiting ring 1.3 is fixed to the front end of the needle protective sleeve after the needle seat assembly is installed into the needle protective sleeve 1, and the inner step is formed in the inner cavity of the needle protective sleeve 1.1.5, in the slot The inner side of the slot at the rear end of the slot is provided with a convex card 1.1.2, and one side of the convex card 1.1.2 is provided. The front and rear end faces of the convex card 1.1.2 are inclined at an acute angle, which makes it easier to slide out of the needle seat when pushing. Corresponding groove, the convex card is a convex card of the rear card contact device. The outer side wall of the tail end of the needle guard is symmetrically provided with a pull operation lug 1.1.4.

Referring to Figures 7 and 8, the limiting ring 1.3 is composed of two coaxial rings which are integrally fixed by one end face, and the end face of the opening can be inserted into the front end portion of the needle guard.

Referring to Figure 9, the end cap is a one-end closed flap.

Referring to Figures 10, 11 and 12, the needle holder 3.1 of the puncture needle cannula assembly is made of a transparent material, which is composed of a stepped tower-shaped hub body 3.1.1, a cylindrical shell with an axial notch coaxial with it 3.1. 2, and the connection of the two guiding joints 3.1.3, the outer side of the cylindrical shell symmetrically set the puncture operation of the ears 3.1.2.1. The guide link is only one side set. 3.1.1.1 is the blood return observation window. The stepped surface of the stepped tower-shaped needle seat 3.1.1.2 and the inner step formed by the limit ring of the front end of the protective sleeve 1.1.5 the card touches back and constitutes the front card contact device, the maximum outer peripheral surface of the stepped tower-shaped needle seat and the protective sleeve The cylindrical surface of the inner cavity is slidingly matched, and the guiding ribs are provided with upper and lower symmetrical sliding grooves, and the radial width of the sliding groove is matched with the wall thickness of the protective sleeve, and a groove is arranged at the bottom of the sliding groove at the front end of the sliding groove near the needle tube, the size of the groove and the protective sleeve The male card of the rear card contact device is matched and constitutes a rear card contact device.

When using, first remove the end cap, hold the needle holder with one hand, pinch the pull tab on the rear end of the sleeve, and slide the sleeve away from the needle tip until the end of the sleeve is fixed. The end of the guide connecting ribs completely exposes the catheter assembly and the blood return observation window on the needle holder, and then the tube can be punctured. The hand-operated flap is spliced forward with the needle assembly, the catheter assembly, and the needle guard that is snapped into the posterior portion of the needle assembly. When the catheter is successfully placed, pull the needle holder backward, withdraw the needle tube assembly and let the needle tube re-enter into the needle tube protective sleeve. At this time, the needle tube is completely covered by the sleeve, preventing accidental injury and blood pollution in the subsequent treatment of the needle tube. .

The parts not described in the present invention are the same as those in the prior art.

Claims

Open-type indwelling needle for slotted protective sleeve, including needle guard, catheter assembly, puncture needle and vent plug assembly, with operating flaps or levers fixed on the needle seat, venting impervious vent assembly At the rear of the needle hub, the indwelling channel is located in the inner core of the catheter hub, wherein the needle hub is connected to the operating flap or the operating latch by a guiding connecting rib, the sheath protective sleeve is an elongated hollow shell, a side wall or Corresponding two side walls have a certain length of sliding slot, the front end of the sliding slot is open, and the slot corresponds to the guiding connecting rib and can accommodate the guiding connecting rib, and the needle protecting sleeve is inserted into the needle seat from the rear end of the indwelling needle and Slide forward until the rear contact device between the two is snap-fitted. At this time, the needle protector completely shields the needle tip. Fix the convex card on the inner wall at the front end of the needle protector, and pull the needle protector backward. The card contact device is disengaged from the card until the cam card and the pin holder are in contact with each other to form a front card, and the needle tube assembly separated from the catheter assembly after the puncture moves relative to the needle tube sleeve and is retracted into the needle tube protection sleeve until the rear card is touched. Opposing contact card is connected again, this time the needle guard tip completely covered again.
The open type indwelling needle of the slot type protective cover according to claim 1, wherein when the sliding slot is disposed on one side, the rear end of the sliding slot or the blind resistance or the opening is set on both sides of the sliding slot. When the sliding slot is blinded at the rear end.
The open type indwelling needle of the slot type protective cover according to claim 1, further comprising a needle holder contact device, wherein the needle holder contact device is located between the needle holder and the needle protection sleeve, the front card When the touch device is snapped back, the needle holder contact device is snap-fitted.
The open-type indwelling needle of the slot type protective cover according to claim 1, wherein the rear latching device is composed of a matching convex card point and a groove, and the convex card point and the groove are respectively located in the needle tube protection. On the sleeve and the corresponding card contact, the card contact is either a needle seat or an operating flap or a guide connecting rib.
The open type indwelling needle of the slot type protective cover according to claim 1, wherein the front latching device is defined by a limiting ring and a needle seat or a needle holder that can be engaged with the limiting ring. Stepped, the limit ring is fixed to the front end of the needle guard after the needle seat assembly is installed into the needle guard sleeve, and an inner step is formed in the inner cavity of the needle guard sleeve, and the inner step is a convex card.
The open type indwelling needle of the slot type protective cover according to claim 3, wherein the needle tube holder contact device is composed of a matching convex card point and a groove, and the convex card point and the groove are respectively located in the needle tube. Protective sleeve and needle holder.
The open indwelling needle of the slotted protective cover of claim 1 further comprising an end cap that is plugged to the front end of the needle guard.
The open type indwelling needle of the slot type protective cover according to claim 1, wherein the sleeve as the needle sleeve is a thin columnar housing, and a rectangular slit of a certain width is opened on one side, the slot and the socket The upper guiding connecting rib is slidingly matched, and one end of the slot is opened. After the needle seat assembly is installed into the needle guard, the limiting ring is fixed to the front end of the needle protective sleeve and forms an inner step in the inner cavity of the needle protective sleeve, after the slot The inner side of the end slot is provided with a convex card, and the convex card is either single or opposite, and the front and rear end faces of the convex card are inclined at an acute angle, so that it is easier to slide out the corresponding groove on the needle seat when pushing. The convex card is a convex card of the rear card contact device, and the needle seat of the puncture needle tube assembly is made of a transparent material, which is composed of a stepped tower-shaped needle seat body, a cylindrical shell with an axial gap coaxial thereto, and a connection between the two. The guiding connecting ribs are formed, and the outer side of the cylindrical shell is symmetrically arranged with the puncture operation pinch, and the inner step formed by the stepped surface of the stepped tower-shaped needle seat and the limit ring at the front end of the protective sleeve is snapped back to form a front card contact device, and the stepped tower Needle seat The large outer peripheral surface is slidingly matched with the cylindrical surface of the protective sleeve, and the guiding rib is provided with a vertically symmetrical sliding groove. The radial width of the sliding groove is matched with the thickness of the protective sleeve wall, and a groove is arranged at the bottom of the sliding groove at the front end of the sliding groove near the needle tube. The groove size matches the convex card of the rear gripping device of the protective cover and constitutes a rear snap device.
The open type indwelling needle of the slot type protective cover according to claim 1, wherein the outer side wall of the tail end of the needle tube protective sleeve is symmetrically disposed with a pulling operation lug.