CN2676935Y - Cannula type dispensing needle - Google Patents

Abstract

The utility model discloses a cannula type dispensing needle head, which comprises a needle body 1, a needle seat 2, a cannula 3 and a cannula rotation handle 4. The front end of the needle body 1 is provided with an elliptical medicine liquid injection side hole 5. The elliptical medicine liquid injection side hole 5 is communicated with the needle seat 2 through a medicine injection tube cavity 6. The relevant position of the front end of the cannula 3 is also provided with a side hole 7. The opposite side of the upper part of the elliptical liquid medicine injection side hole 5 of the needle body 1 is provided with an air outlet hole 8. The air outlet hole 8 of the needle body 1 is communicated with a vacuum bag 10 through an air outlet tube cavity 9. The position of the wall of the cannula 3 corresponding to the air outlet hole 8 of the needle body 1 is provided with an air outlet side hole 11. When the cannula type dispensing needle head is penetrated a medicine bottle, the penetrating of the cannula type dispensing needle head has no hole. The utility model avoids the entering of insoluble matters, and the pollution of medicine can not be generated. The air in the medicine bottle enters the vacuum bag under a complete sealing state, the balance of the inner and the outer pressure in the medicine bottle is realized, and the utility model is very safe in use.

Description

The bushing type syringe needle that makes up a prescription

Technical field

This utility model relates to a kind of dispensing instrument of injection, specifically a kind of bushing type syringe needle that makes up a prescription.

Background technology

For closed bottled medicine, comprise powder or injection, need could be done intravenous injection after making up a prescription, and as powder, dissolving could be done intravenous injection after need injected liquor.When making up a prescription, present employed dispensing needle is generally syringe needle, syringe needle is a hollow cavity, the front end pin mouth of syringe needle is a beveled aperture, after thrusting syringe needle in the medicine bottle, inject the liquor medicine, dissolve or mixing, and then extract the medicinal liquid for preparing with entry needle and inject, its weak point is: 1, because medicine bottle is to carry out under air-proof condition, the medicine bottle internal pressure is higher, liquid medicine is difficult for injecting, when particularly adding medicinal liquid in a large number, have only gradation to carry out ability and inject, operation is wasted time and energy, inefficiency; 2, because the pin mouth is a beveled mouth, easily bottle stopper thorn insoluble substance is down brought in the medicine bottle, produce and pollute, carry out intravenous injection with the medicinal liquid of this pollution, can cause blood vessel blockage, cause secondary thrombus or granulation etc., even the generation septicemia.The employing that has on injection needle, added trocar sheath, be provided with airway between needle body and the trocar sheath, though certain ventilatory function is arranged, reduce the pressure in the medicine bottle, but the shortcoming of angle face syringe needle is still unresolved, and also easily enters the medicinal liquid after making up a prescription in the airway, and gas-liquid can not be separated.

Summary of the invention

The purpose of this utility model is to provide a kind of atresia to thrust, can avoid bringing into insoluble matter, the effective isolating bushing type of outlet passageway and the injection liquid passage syringe needle that makes up a prescription.

For reaching above purpose, the technical scheme that this utility model adopted is: this bushing type syringe needle that makes up a prescription, comprise needle body, needle stand, sleeve pipe and sleeve pipe handler constitute, establish the ellipticity medicinal liquid at the front end of needle body and inject side opening, the ellipticity medicinal liquid injects side opening and is communicated with needle stand by the injection tube chamber, also establish side opening in telescopic front end relevant position, the top offside that injects side opening at the ellipticity medicinal liquid of needle body sets out pore, venthole on the needle body is communicated with vacuum bag by the tube chamber of giving vent to anger, on the telescopic wall with needle body on the venthole opposite position also set out the gas side opening, when passing through rotating casing, make the side opening on the sleeve pipe and give vent to anger side opening and needle body on ellipticity medicinal liquid when injecting side opening and the corresponding coincidence of venthole, gases at high pressure in the medicine bottle just enter in the vacuum bag, and medicinal liquid also injects in the medicine bottle smoothly.This utility model is also implemented by following measure: the outer wall of described needle body is cylindric, and its overall diameter is consistent with telescopic interior diameter, after needle body inserts sleeve pipe, but tight seal, but can rotate; The venthole that the ellipticity medicinal liquid of described needle body front end injects side opening and rear end should have suitable distance, generally requires after venthole enters the medicine bottle bottle stopper, and the position that syringe needle enters medicine bottle bottle 2/3 gets final product; Described vacuum bag is a plastic bag, before puncture in medicine bottle, by extruding gas in the vacuum bag is extruded.When using this utility model, extrude the gas in the vacuum bag earlier, rotate needle body then, the ellipticity medicinal liquid inject side opening and venthole all with casing wall on side opening misplace, become a kind of sealing state, at this moment, the sleeve pipe front end is slick needle point face, thrust then in the medicine bottle, realize the atresia puncture, again rotating casing, ellipticity medicinal liquid injection side opening and venthole are overlapped with the sleeve pipe side opening, gas enters vacuum bag in the medicine bottle, has realized the inside and outside pressure balance of bottle, and the medicinal liquid that makes up a prescription can inject smoothly.

The beneficial effects of the utility model are: compare with the dispensing needle of present use, when thrusting in the medicine bottle, thrust for atresia, avoided bringing into of insoluble matter, medicine can not produce pollution, gas is entering vacuum bag under the sealing state fully in the bottle, realize the inside and outside pressure balance of bottle, use as safe as a house, simultaneously, the venthole position is higher, and medicinal liquid is not easy to enter in the vacuum bag.

Description of drawings

Fig. 1 looks sketch map for this utility model structure master.

Fig. 2 is this utility model structure schematic side view.

Fig. 3 is that this utility model is along Fig. 2 A-A cross-sectional schematic.

The specific embodiment

Make this utility model with reference to accompanying drawing 1,2,3.This bushing type syringe needle that makes up a prescription, comprise needle body 1, needle stand 2, sleeve pipe 3 and sleeve pipe handler 4 constitute, establish the ellipticity medicinal liquid at the front end of needle body 1 and inject side opening 5, the ellipticity medicinal liquid injects side opening 5 and is communicated with needle stand 2 by injection tube chamber 6, side opening 7 is also established in relevant position at the front end of sleeve pipe 3, the top offside that injects side opening 5 at the ellipticity medicinal liquid of needle body 1 sets out pore 8, venthole 8 on the needle body 1 is communicated with vacuum bag 10 by the tube chamber 9 of giving vent to anger, on the wall of sleeve pipe 3 with needle body 1 on venthole 8 opposite positions also set out gas side opening 11, when passing through rotating casing 3, make the side opening 7 on the sleeve pipe 3 and give vent to anger side opening 11 and needle body 1 on ellipticity medicinal liquid when injecting side opening 5 and venthole 8 corresponding coincidences, gases at high pressure in the medicine bottle just enter in the vacuum bag 10, and medicinal liquid also injects in the medicine bottle smoothly.The outer wall of described needle body 1 is cylindric, and its overall diameter is consistent with the interior diameter of sleeve pipe 3, after needle body 1 inserts sleeve pipe 3, but tight seal, but can rotate; The venthole 8 that the ellipticity medicinal liquid of described needle body 1 front end injects side opening 5 and rear end should have suitable distance, generally requires after venthole 8 enters the medicine bottle bottle stopper, and the position that syringe needle enters medicine bottle bottle 2/3 gets final product; Described vacuum bag 10 is a plastic bag, before puncture in medicine bottle, by extruding the gas in the vacuum bag 10 is extruded.

Claims (2)

1, a kind of bushing type syringe needle that makes up a prescription, comprise needle body (1), needle stand (2), sleeve pipe (3) and sleeve pipe handler (4) constitute, it is characterized in that establishing the ellipticity medicinal liquid at the front end of needle body (1) injects side opening (5), the ellipticity medicinal liquid injects side opening (5) and is communicated with needle stand (2) by injection tube chamber (6), side opening (7) is also established in relevant position at the front end of sleeve pipe (3), the top offside that injects side opening (5) at the ellipticity medicinal liquid of needle body (1) sets out pore (8), venthole (8) on the needle body (1) is communicated with vacuum bag (10) by the tube chamber of giving vent to anger (9), on the wall of sleeve pipe (3) with needle body (1) on venthole (8) opposite position also set out gas side opening (11).

2, the bushing type according to claim 1 syringe needle that makes up a prescription, the outer wall that it is characterized in that described needle body (1) is cylindric, its overall diameter is consistent with the interior diameter of sleeve pipe (3); Described vacuum bag (10) is a plastic bag.