why do we need to tap needle before injecting?

Answer 1

Unless you are injecting an entire syringe full of air a few tiny bubbles is unlikely to ever cause any problem. n the otherwise healthy adult it is estimated that it would take an injection of approx 100cc to cause injury or death. The main reason to clear the bubbles in a syringe is to ensure that you are injecting the correct volume of a med ie. 2 units of insulin not 1.5 units and some air.

Answer 2

Tapping the needle before injections or IV pushes helps dislodege air bubbles which would potentially go into the blood stream. Keep in mind though that you need quite a bit of air at least a whole IV line of air if not more to actually cause an air embolism. Ridding your syringe of air bubbles is good practice but not lethal.

Answer 3

To tap out any air bubbles present in the syringe so as not to inject air into the veins, causing an embolism.

Answer 4

To get rid of any air bubbles inside the tube, air in the formulation could enter the body and cause something known as an embolus, a sometimes instantly lethal condition.

Answer 5

get the bubble out that form within the needle

Answer 6

Dislodge and remove potentially fatal air bubbles

Answer 7

To remove air bubbles, if they get into the blood, it can be deadly.

Answer 8

to get rid of potentially deadly air bubbles

Answer 9

So any bubbles will rise to the top to be evacuated

Answer 10

I really hope you dont inject anyone...or else you should already know this...