CN104353152B - Safety type disposable scalp needle - Google Patents

Abstract

The invention relates to a safe disposable scalp needle, comprising a needle head and an infusion tube, the needle head is fixed on the end of the infusion tube, the side of the end of the infusion tube is provided with a needle wing and a safety sheath, The outer wall of the end of the infusion tube is provided with a circle of raised snap rings. In the safety disposable scalp needle, the needle and the infusion tube are axially slidably arranged in a safety sheath, the front part of the safety sheath is in clearance fit with the snap ring, and the rear part is in interference fit with the snap ring. When the disposable scalp needle is used up, pull the infusion tube backward until the snap ring interferes with the rear wall of the safety sheath to block the infusion tube, and completely retract the needle into the safety sheath to avoid accidents to medical staff. cause accidental injury.

Description

A safe disposable scalp needle

technical field

The invention relates to a medical needle, in particular to a safe disposable scalp needle.

Background technique

A needlestick injury is an accidental injury in which a needle penetrates deep into the skin enough to cause the victim to bleed. Injury from contaminated needles and sharps puts you at risk of contracting blood-borne diseases. Existing disposable scalp needles are composed of a needle head, needle wings, and nylon leather tube. The disadvantages are: the needle of the scalp needle is in a free exposure state after being pulled out from the patient's body or in the process of being separated and put into the sharps box, which may easily cause needle stick injury. Many studies have shown that nurses are the occupational group with the highest frequency of needlestick injuries in hospitals, with an incidence rate of 88.97%. Nurses are also a group with a high incidence of blood-borne diseases. More than 20 blood-borne diseases can be transmitted through needlestick injuries, among which HBV, HCV, and HIV are the most common and harmful. The accidental needlestick injuries of nurses almost all occurred when the liquid was removed. The main reasons are as follows: ①Traditional separation infusion scalp needle operation and immediately take the liquid bag after pulling out the needle. The scalp needle is in a free state, which is easy to hurt yourself and the surrounding people And when dealing with the needle stuck into the bottle stopper, it may cause secondary pollution of blood. ②Traditional separate infusion scalp needle operation puts all the items to be treated together, which is easy to puncture, although medical staff are still unavoidable to be stabbed, scratched and other injuries by sharp instruments in medical work.

Contents of the invention

Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a safer disposable scalp needle.

In order to achieve the above object, the present invention provides the following technical solutions: a safety type disposable scalp needle, comprising a needle and an infusion tube, the needle is fixed on the end of the infusion tube, and the side of the end of the infusion tube is provided with The needle wing is characterized in that: it is also provided with a safety sheath, the outer wall of the end of the infusion tube is provided with a circle of raised snap rings, the safety sheath is a tubular member, and the front and rear inner diameters of the safety sheath are different. The front part is in clearance fit with the snap ring, and the rear part is in interference fit with the snap ring. The safety sheath is axially and slidably sleeved outside the needle and the infusion tube. The length of the safety sheath is the same as that of the said safety sheath. The lengths of the needles match, and the wall of the safety sheath is provided with a slot at one end along the axial direction with a width matching the thickness of the needle wing.

The safe disposable scalp needle of the present invention is because the needle and the infusion tube are axially slidably arranged in a safety sheath, and the end tube wall of the infusion tube is provided with a raised snap ring, and the front part of the safety sheath It is clearance fit with the snap ring, and the rear part is interference fit with the snap ring. When the disposable scalp needle is used up, pull the infusion tube backward until the snap ring interferes with the rear wall of the safety sheath to block the infusion tube, and completely retract the needle into the safety sheath to avoid accidents to medical staff. Cause accidental injury, and the structure is very simple.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the needle protruding state of the specific embodiment of the present invention;

Fig. 2 is a three-dimensional structure diagram of a needle recovery position state according to a specific embodiment of the present invention;

Fig. 3 is a cross-sectional view of the internal structure of a specific embodiment of the present invention when the needle head is retracted;

Fig. 4 is an enlarged view of part I of Fig. 3;

Fig. 5 is the front view of the structure of a specific embodiment of the safety sheath of the present invention;

Fig. 6 is A-A sectional view of Fig. 5;

Fig. 7 is a sectional view of the internal structure of another specific embodiment of the safety sheath of the present invention.

detailed description

As shown in Figure 1, the safety disposable scalp needle comprises a needle 1, an infusion tube 2 and a safety sheath 3, the needle 1 is fixed on the end of the infusion tube 2, and one side of the end of the infusion tube 2 ( or both sides) are provided with needle wings 4 for easy operation, and the outer wall of the end of the infusion tube 2 is provided with a ring of raised snap rings 5 . As shown in Figure 5-7, the safety sheath 3 is a tubular member, the front and rear inner diameters of the safety sheath 3 are different, the front part is in clearance fit with the snap ring 5, and the rear part is in interference with the snap ring 5 Cooperate, as shown in Figure 7, the front and rear inner diameters of the safety sheath 3 can be tapered. , there is a tapered connection between the two sections, the inner diameter of the front section of the safety sheath 3 is in clearance fit with the outer diameter of the snap ring 5, the inner diameter of the rear section of the safety sheath 3 is in contact with the infusion tube 2 The outer diameter is clearance fit, and the middle of the tapered connection part is interference fit with the snap ring 5, as shown in Figures 3 and 4. The safety sheath 3 is slidably sleeved on the outside of the needle head 1 and the infusion tube 2 in the axial direction, and the tube wall of the safety sheath 3 is provided with a slot in the axial direction whose width matches the thickness of the needle wing 4 6. The opening end of the slot 6 is at the front end, that is, the side facing the needle head 1 . The lengths of the safety sheath 3 and the slot 6 should match the length of the needle 1, that is, when the needle wing 4 slides back along the slot 6, there should be enough displacement to make the snap ring 5 slide to the conical connection. When the snap ring 5 slides to the tapered connection part and the tapered connection part interferes with it, the safety sheath 3 should have enough length to accommodate the entire needle 1 in the safety sheath 3 , as shown in Figure 2-4, so as to avoid accidental injury to medical personnel, the snap ring 5 is preferably made of a material with certain elasticity such as silica gel, which is more conducive to interference fit with the tapered connection part.

Claims (1)

1. the disposable scalp acupuncture of a kind of safety, including syringe needle, tube for transfusion, described syringe needle is fixed on the end of tube for transfusion, institute The end sides stating tube for transfusion be provided with the pin wing it is characterised in that: be additionally provided with safety shield, the end outer wall of described tube for transfusion is provided with The raised snap ring of one circle, described safety shield is tubular element, and before and after described safety shield, internal diameter differs, forward part and described card Czermak space coordinates, afterwards part and described snap ring interference fit, and described safety shield is axially slidably set in syringe needle and transfusion Pipe is outer, and the length of described safety shield is matched with described needle length, and described safety shield tube wall is provided with one end and sets vertically There is the grooving of width and the cooperation of pin wing thickness gap, the opening of described grooving is in leading section i.e. towards syringe needle side, described Before and after the endoporus of safety shield, two sections of internal diameters differ, and are provided with cone connection, the leading portion of described safety shield between described two sections Internal diameter and described snap ring crest clearance cooperation, with described snap ring interference fit in the middle of cone connection, after described safety shield Section internal diameter adopts silica gel with described tube for transfusion crest clearance cooperation, snap ring.