How to reduce the formation of glass stoppers when dosing

This article discusses infusion dosing (glass bottles) when the rubber stopper into the infusion bottle, how to reduce some? Some people would like to explain it. I think this cannot be explained lightly. After all, it is foreign matter that enters the body. This is a violation of the operating procedures. We routinely insert the needles quickly and vigorously at a 90-degree angle. The needles above the 10th will easily plug the rubber into cylindrical plugs and push the glass bottles with external force. I usually use a dosing method at the same time. (Using a larger syringe) is better than the conventional method introduced in our textbooks. In 2003, no new method was used and no rubber stopper was found in the bottle.
The method is described as follows:
Routine disinfection, after the syringe sucks the drug, the needle is slanted upwards, the needle and the stopper plane form a 45--60 degree angle (preferably no more than 60 degrees). After the bevel enters the rubber stopper, the syringe and the bottle mouth Insert the needle at an angle of 90--100 degrees and add the medicine.
Use of this method is to change the insertion route of the needle, buffer the direct pressure, and reduce the formation of rubber plugs.