CN216495310U

CN216495310U - Blood-gas needle

Info

Publication number: CN216495310U
Application number: CN202123094008.3U
Authority: CN
Inventors: 刘明慧; 张�杰; 杨青青
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-05-13
Anticipated expiration: 2031-12-10

Abstract

The application provides a blood-gas needle, which comprises a needle cylinder, wherein the front end of the needle cylinder comprises a nipple and an outer ring arranged around the nipple; the upper side and the lower side of the outer ring are respectively provided with a cutting strip, the front end of each cutting strip is a free end, and the rear end of each cutting strip and the outer ring are integrated; the lower side of each cutting strip is provided with convex teeth protruding inwards; a handle is formed on the upper side of each cutting strip; a needle seat is detachably arranged on the nipple; a steel needle is formed at the front end of the needle seat; a concave portion is formed on the outer periphery of the needle holder corresponding to each of the convex teeth; when the needle seat is arranged on the nipple, the convex teeth of each cutting strip are clamped into the concave parts corresponding to the cutting strips; a coil spring is formed in the gap between the outer ring and the nipple, and the rear end of the coil spring is fixed on the needle cylinder; the coil spring is compressed when the needle mount is mounted on the nipple.

Description

Blood-gas needle

Technical Field

The application relates to a medical instrument, in particular to a blood-gas needle.

Background

Fig. 1 to 4 show a conventional blood gas needle. It comprises a syringe 10, the front end of the syringe 10 comprises a nipple 12 and an outer ring 11 arranged around the nipple. The inner side of the outer ring 11 is internally threaded. A steel needle 21 is formed on the needle stand 20. Two convex teeth 22 are formed on the periphery of the needle seat 20; the hub is mounted in the outer ring 11 by the teeth 22 rotating along the internal thread of the outer ring 11 and the nipple 12 is inserted into the hub 20.

When removing the needle seat, the steel needle 21 is first sleeved back with the cap, and then the needle seat 20 is unscrewed from the outer ring 11. This needs to be done by using two hands, one hand holding the syringe and the other hand twisting the needle seat, which is relatively troublesome to operate. The cap needs to be sleeved back first because the needle seat is operated from the direction of the steel needle by one hand. But the recap cap itself is also susceptible to needle stick injuries.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present application is directed to a blood gas needle that can be removed with a single hand operation.

The application discloses a blood-gas needle, which comprises a needle cylinder, wherein the front end of the needle cylinder comprises a nipple and an outer ring arranged around the nipple; the upper side and the lower side of the outer ring are respectively provided with a cutting strip, the front end of each cutting strip is a free end, and the rear end of each cutting strip and the outer ring are integrated; the lower side of each cutting strip is provided with convex teeth protruding inwards; a handle is formed on the upper side of each cutting strip;

a needle seat is detachably arranged on the nipple; a steel needle is formed at the front end of the needle seat; a concave portion is formed on the outer periphery of the needle holder corresponding to each of the convex teeth; when the needle seat is arranged on the nipple, the convex teeth of each cutting strip are clamped into the concave parts corresponding to the cutting strips;

a coil spring is formed in the gap between the outer ring and the nipple, and the rear end of the coil spring is fixed on the needle cylinder; the coil spring is compressed when the needle mount is mounted on the nipple.

Preferably, a guide opening is formed on the outer ring corresponding to each cut strip;

a raised guide fin is formed on the periphery of the needle seat corresponding to each concave part; when the needle seat is arranged on the nipple, the guide fins are inserted into the corresponding guide openings.

Preferably, the handle is formed obliquely to extend from a front end to a rear end of the outer ring; the handles of the cutting strips on the upper side and the lower side of the outer ring form a splayed shape together.

The utility model provides a blood gas needle, the inner periphery of outer lane need not form the screw thread, through the depressed part meshing that forms dogtooth and needle file periphery on the outer lane, realizes the card of needle file and holds. When dismantling the needle file, only need press the handle of card strip, the dogtooth will deviate from in the depressed part, under the promotion of the restoring force of spring, the needle file is pushed down from the nipple, and whole operation only needs one hand to accomplish, need not the cooperation of two hands, also need not to overlap the block again, has certainly also reduced the risk that the needle prick hindered.

Drawings

FIG. 1 is a front view schematically illustrating the structure of a syringe of a prior art blood-gas needle;

FIG. 2 is a schematic view showing the structure of the outer ring and the nipple of the end portion of the cylinder of the blood gas needle of FIG. 1;

FIG. 3 is a schematic structural view of a hub of the blood gas needle of FIG. 1;

FIG. 4 is a side view of the needle hub of FIG. 3;

FIG. 5 is a front view of the blood gas needle of the present application;

FIG. 6 is a schematic top view of the blood needle of FIG. 5;

FIG. 7 is a schematic view of the blood gas needle of FIG. 6 in combination with a needle hub;

FIG. 8 is a schematic view of the outer ring, nipple, and hub of the blood gas needle of FIG. 7 in combination;

FIG. 9 is a cross-sectional view of the outer ring and nipple of the lancet of FIG. 5;

fig. 10 is a structural schematic view of the needle holder in fig. 6.

Detailed Description

The blood gas needle of the present application will be described in detail below with reference to the drawings.

The utility model provides a blood gas needle, it includes cylinder 10, and the front end of cylinder 10 includes nipple 12 and encircles the outer lane 11 that the nipple set up.

The upper and lower sides of the outer ring 11 are formed with cut strips 11a, respectively. The slit 11a is formed by two adjacent slits at a predetermined interval. The front end of each cut strip 11a is a free end, and the rear end is formed integrally with the outer ring 11. The lower side of each cutting bar 11a is formed with a convex tooth 11c protruding inwards; a handle 11b is formed at an upper side of each of the cut strips 11 a.

A needle seat 20 is detachably mounted on the nipple 12; a steel needle is formed at the front end of the needle base 20; a recess 23 is formed on the outer periphery of the needle holder 20 corresponding to each tooth 11 c; when the needle holder 20 is mounted on the nipple 12, the convex tooth 11c of each cut strip 11a is caught in the concave portion 23 corresponding thereto, thereby holding the needle holder 20.

A coil spring is formed in a gap between the outer ring 11 and the nipple 12, and the rear end of the coil spring is fixed to the cylinder 10; the coil spring is compressed when the needle mount 20 is mounted on the nipple 12.

A guide opening is formed in the outer ring 11 corresponding to each of the slivers 11 a.

A raised guide fin 24 is formed on the outer circumference of the needle holder 20 corresponding to each recess 23; when the needle holder 20 is mounted on the nipple 12, the guide fins 24 are inserted in the guide openings corresponding thereto.

A handle 11b formed obliquely and extending from the front end to the rear end of the outer ring 11; the handles 11b of the upper and lower cut pieces 11a of the outer ring 11 together form a "figure" as shown in fig. 9.

During the use, when the installation needle file, aim at the depressed part the slitting, with the needle file cover back rear end promotion needle file to the nipple, until the depressed part of needle file periphery and the inward protrusion meshing of slitting be in the same place, coil spring is compressed this moment, and under the card of dogtooth is held, the needle file is firmly blocked in the outer lane, guides the fin this moment and is located the guide opening. When the needle seat needs to be removed, the thumb and the two thumbs respectively press the corresponding handles from the two sides, so that the convex teeth of the cutting strip are separated from the corresponding concave parts; the needle holder is pushed out from the outer race and the nipple by the restoring force of the coil spring, whereby the needle holder is removed. The whole operation is completed by only one hand without cooperation of two hands, thereby reducing the occurrence of needle stick injuries. The protective cap for plugging the nipple after blood collection can also adopt a structure similar to the needle seat.

Claims

1. A blood-gas needle comprises a needle cylinder, the front end of the needle cylinder comprises a nipple and an outer ring arranged around the nipple; the method is characterized in that: the upper side and the lower side of the outer ring are respectively provided with a cutting strip, the front end of each cutting strip is a free end, and the rear end of each cutting strip and the outer ring are integrated; the lower side of each cutting strip is provided with convex teeth protruding inwards; a handle is formed on the upper side of each cutting strip;

2. The blood gas needle of claim 1, wherein:

a guide opening is formed on the outer ring corresponding to each cutting strip;

3. The blood gas needle of claim 1, wherein:

the handle is obliquely formed and extends from the front end to the rear end of the outer ring; the handles of the cutting strips on the upper side and the lower side of the outer ring form a splayed shape together.