As a new type of medicine packaging method, plastic syr […]
As a new type of medicine packaging method, plastic syringe has the characteristics of simple use and convenient operation. High-quality plastic syringes need to undergo various inspections such as appearance, tightness and lubricity, and the safety and stability of the product can be guaranteed only if the inspection is qualified.
Appearance Quality
Take an appropriate amount of this product, and in a bright place with natural light, the observer's eyes are about 300mm away from the sample, and the appearance of the sample meets the requirements.
Tightness
Take an appropriate amount of this product, add half of the water (or colored solution) to the needle tube, match the push rod to drive out the air, make sure there is no air in it, wear a protective cap, pass the push rod, and apply an axial pressure of 30N on the push rod piston , Keep for 30 seconds, there should be no leakage at the seal of the protective cap and the seal of the piston.
Lubricity
Take an appropriate amount of this product, insert the push rod (push rod with piston) into the needle tube, and push the push rod into the entire needle tube. The push rod piston should move smoothly without sudden stop.
The plastic syringe is composed of a needle tube, a cap, a push rod or a piston. It can generally be used to inject into the udder of dairy cows. The sterility and abnormal toxicity of the plastic syringe are two important indicators.
Sterility detection method of plastic syringe:
(After sterilization) Take an appropriate amount of this product, add 1/2 of the labeled volume of sodium chloride injection, cover the piston and cap, shake for 1 minute, and combine the extracts. Take the extract and inoculate 2 small tubes of thioglycolate fluid medium (TG) (9ml per tube), 0.2ml each; one is cultured at 35～37℃, and the other is cultured at 23～25℃. Another small TSB tube (7ml per tube) was used to inoculate 0.2ml, cultured at 23～25℃, and checked according to the sterility inspection method, which should meet the requirements.
Detection of abnormal toxicity of plastic syringes:
Take a few of this product, clean the syringe with water, cut it into pieces, take 500cm2 (in terms of inner surface area), add 50ml of sodium chloride injection, put it in an autoclave at 110°C for 30 minutes, take it out, cool it and set it aside. The same batch of sodium chloride injection was blanked and injected intravenously. The inspection should meet the requirements according to the law.
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