阅读说明：本技术 一种药液配制方法 (Method for preparing liquid medicine ) 是由 陆兴中 于 2019-10-14 设计创作，主要内容包括：本发明公开了一种药液配制方法,包括如下步骤：将注射器本体的针头垂直插入药瓶的瓶口橡胶塞中并伸入药瓶中,推动推力活塞将针筒中的生理盐水完全推入药瓶中；生理盐水推入完毕后向后缓慢拔针筒,使针头前端脱离药瓶中的药液表面；放开推力活塞后端,推力活塞退回至初始位置,同时将药瓶中的空气吸出,降低药瓶中的气压；最后拔出针头。本发明配药完成放开推力活塞后,在弹簧的回弹力作用下,推力活塞可退回至初始位置,同时将药瓶中的空气吸出,降低了药瓶中的气压,能够避免配药时药物在药瓶中气压的作用下直接溅出,从而避免对医护人员身体健康造成危害,也不会弥散到空气中沾染到医护人员的体表,方便了配药操作。(The invention discloses a liquid medicine preparation method, which comprises the following steps: the needle head of the injector body is vertically inserted into the bottleneck rubber plug of the medicine bottle and extends into the medicine bottle, and the pushing piston is pushed to completely push the physiological saline in the needle cylinder into the medicine bottle; slowly pulling out the needle cylinder after the physiological saline is pushed in, so that the front end of the needle head is separated from the surface of the liquid medicine in the medicine bottle; releasing the rear end of the thrust piston, retracting the thrust piston to the initial position, sucking out air in the medicine bottle, and reducing air pressure in the medicine bottle; and finally, pulling out the needle head. After the thrust piston is released after dispensing, the thrust piston can return to the initial position under the action of the resilience force of the spring, and air in the medicine bottle is sucked out, so that the air pressure in the medicine bottle is reduced, the medicine can be prevented from directly splashing out under the action of the air pressure in the medicine bottle during dispensing, the harm to the health of medical staff is avoided, the medicine can not be dispersed into the air to be infected on the body surface of the medical staff, and the dispensing operation is facilitated.)

1. A method for preparing liquid medicine is characterized by comprising the following steps:

step A: when dispensing is needed, the needle head (12) of the injector body (1) is vertically inserted into the bottle mouth rubber plug of the medicine bottle and extends into the medicine bottle, and the pushing piston (13) is pushed to completely push the physiological saline in the needle cylinder (11) into the medicine bottle;

and B: after the physiological saline is pushed in, the needle cylinder (11) is slowly pulled out, so that the front end of the needle head (12) is separated from the surface of the liquid medicine in the medicine bottle;

and C: releasing the rear end of the thrust piston (13), wherein one end of a spring (14) is fixed at the front end of the thrust piston (13), the other end of the spring (14) is fixed on the inner wall of the needle cylinder (11), the spring (14) is under the action of tension, and after the thrust piston (13) is released, the thrust piston (13) can return to an initial position under the action of resilience force of the spring (14), and meanwhile, air in the medicine bottle is sucked out, so that the air pressure in the medicine bottle is reduced;

step D: and finally, the needle head (12) is pulled out, and the liquid medicine cannot be sprayed out of the medicine bottle because the air pressure in the medicine bottle is reduced to be consistent with the outside of the medicine bottle, so that the medicine is prevented from being directly sprayed out along with the pulled needle head during medicine preparation.

2. The method of preparing a drug solution according to claim 1, wherein the amount of the physiological saline solution pushed in is observed through a scale at the distal end of the cylinder (11) in the step A.

3. The method of preparing chemical liquid according to claim 1, wherein the withdrawal speed of the cylinder (11) in the step B is 3 mm/s.

Technical Field

The invention relates to a method for preparing liquid medicine, and belongs to the technical field of medical treatment.

Background

Doctors or nurses need to inject physiological saline into the medicine bottles filled with solid medicines through the needle tubes when injecting medicaments or preparing injection for patients, the air pressure in the medicine bottles can rise along with the physiological saline, when the physiological saline is injected and pulled out, the liquid medicine in the medicine bottles can splash out along with the pulled-out needle heads under the action of the air pressure in the medicine bottles, some medicines cannot harm people, and chemotherapy medicines for treating cancers have great harm to human bodies, and once the medicines splash to the body surfaces of medical care personnel, the medicine bottles can cause great harm to the health of the human bodies. In order to solve the problem, the current common method is body surface protection, such as wearing a mask, gloves and the like, however, on one hand, the operation of medical staff is troublesome, and on the other hand, the splashed liquid medicine is dispersed into the air and can be infected on the body surface of a person.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a liquid medicine preparation method, which can avoid the medicine from splashing along with a pulled needle head during medicine preparation, can avoid the injury to medical personnel and is convenient for the medical personnel to operate.

In order to achieve the purpose, the invention adopts the technical scheme that: a method for preparing a liquid medicine comprises the following steps:

step A: when dispensing is needed, the needle head of the injector body is vertically inserted into the bottleneck rubber plug of the medicine bottle and extends into the medicine bottle, and the pushing piston is pushed to push the physiological saline in the needle cylinder into the medicine bottle completely;

and B: slowly pulling out the needle cylinder after the physiological saline is pushed in, so that the front end of the needle head is separated from the surface of the liquid medicine in the medicine bottle;

and C: after the thrust piston is released, the thrust piston can return to the initial position under the action of the resilience force of the spring, and simultaneously air in the medicine bottle is sucked out, so that the air pressure in the medicine bottle is reduced;

step D: and finally, the needle head is pulled out, and the liquid medicine cannot be sprayed out of the medicine bottle because the air pressure in the medicine bottle is reduced to be consistent with the outside of the medicine bottle, so that the medicine is prevented from being directly sprayed out along with the pulled needle head during medicine dispensing.

Preferably, the step A is to observe the amount of the physiological saline pushed in through the scale of the front end of the syringe.

Preferably, the syringe pull-out speed in said step B is preferably 3 mm/s.

After the thrust piston is released after the medicine is dispensed, the thrust piston can return to the initial position under the action of the resilience force of the spring, and meanwhile, air in the medicine bottle is sucked out, so that the air pressure in the medicine bottle is reduced, the medicine can be prevented from directly splashing out under the action of the air pressure in the medicine bottle during medicine dispensing, the harm to the health of medical staff is avoided, and the medicine can not be dispersed into the air to be infected on the body surface of the medical staff. The medical care personnel do not need to carry out redundant protection, thereby greatly facilitating the operation of the medical care personnel.

Drawings

FIG. 1 is a schematic view of an injection device for use in the present invention;

in the figure, 1 is an injector body, 11 is a syringe, 11a is a limiting bulge, 12 is a needle, 13 is a thrust piston, and 14 is a spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in the figure, an automatically regulated formula injection device, includes syringe body 1, syringe body 1 includes cylinder 11, 11 front end installation syringe needles 12 of cylinder, and thrust piston 13 is inserted to the opening part of rear end, the cover has spring 14 on the thrust piston 13, spring 14 one end is fixed at thrust piston 13 front end, and the other end is fixed on 11 inner walls of cylinder.

Preferably, the front end surface of the cylinder 11 is provided with a scale for observing the pushed-in dose of the saline solution.

Furthermore, the inner wall of the rear part of the needle cylinder 11 is provided with a limiting protrusion 11a, and the end part of the spring 14 is fixed on the limiting protrusion 11a. The limiting protrusion 11a can play a good limiting role in the thrust piston 13, and the thrust piston 13 is prevented from being accidentally pulled out to cause overall damage.

Preferably, for the convenience of holding, and improving the convenience of operation, the length of the needle cylinder 11 is 10 mm.

When dispensing is needed, the needle 12 of the injector body 1 is vertically inserted into the bottle mouth rubber plug of the medicine bottle and extends into the medicine bottle, and the pushing piston 13 is pushed to push the physiological saline in the needle cylinder 11 into the medicine bottle completely; after the physiological saline is pushed into the medicine bottle, the needle tube 11 is pulled backwards at the speed of 3mm/s to enable the front end of the needle head 12 to be separated from the surface of the liquid medicine in the medicine bottle, at the moment, the rear end of the thrust piston 13 is released, because one end of the spring 14 is fixed at the front end of the thrust piston 13, the other end of the spring is fixed on the inner wall of the needle tube 11, the spring 14 is under the tension force action, after the thrust piston 13 is released, under the action of the resilience force of the spring 14, the thrust piston 13 can return to the initial position, air in the medicine bottle is sucked out; and finally, the needle head 12 is pulled out, and the liquid medicine cannot be sprayed out of the medicine bottle because the air pressure in the medicine bottle is reduced to be consistent with the outside of the medicine bottle, so that the medicine cannot be directly sprayed out along with the pulled needle head during medicine dispensing, the human body cannot be injured, and the medicine cannot be dispersed into the air to be infected on the body surface of medical personnel.