before giving an injection why does the doc tap the needle and squirt it a little bit first...
2007-12-26 17:09:56 · 10 answers · asked by akfortyseven 4 in Science & Mathematics ➔ Medicine
A little bubble of air won't hurt you, even inf injected IV. Most medication vials are overfilled, so when we draw them up, there's a little bit extra drug in the syringe.
If you tap the syringe, the air rises and you can squirt it out of the needle. Then you can measure your dose properly. If there's extra in there, we squirt that out.
2007-12-27 09:11:23 · answer #1 · answered by Pangolin 7 · 3⤊ 0⤋
By tapping, this causes the air bubbles trapped within the liquid to float to the surface of the liquid. Before injecting, the doctor pushes out the liquid to get rid of the air bubbles as well as to obtain the correct volume of the liquid to be injected into the patient.
2007-12-27 02:07:25 · answer #2 · answered by Maddie 1 · 0⤊ 0⤋
tapping the needle before injection expresses any air. one squirts a bit of the med out as it's being pushed by the plunger to the base of the needle -also done to expel air.
2007-12-27 01:13:20 · answer #3 · answered by KitKat 7 · 2⤊ 0⤋
Air may be one consideration, but unless it's a LOT of air, like 10cc's and it's injected intravenously, it's really not a clinical problem. The main practical reason is to be able measure and read the correct dosage of medication being given as precisely as possible.
2007-12-27 01:19:31 · answer #4 · answered by Lorenzo Steed 7 · 2⤊ 0⤋
Actually, it's not the needle but the syringe that gets tapped. It gets air bubbles out of the syringe, so you can get an exact measure of the dose.
2007-12-27 03:28:56 · answer #5 · answered by Anonymous · 1⤊ 0⤋
the tap agitates things and gets air bubbles floating to the high end so they can be squirted out. an air bubble in the blood vein kills.
2007-12-27 01:16:43 · answer #6 · answered by Anonymous · 0⤊ 2⤋
So you clear any trapped air out of the hypo. Injected air can cause SERIOUS problems.
2007-12-27 01:14:36 · answer #7 · answered by Wes C 2 · 0⤊ 1⤋
Clear the air bubbles. Air bubbles in the blood stream is very dangerous
2007-12-27 01:30:17 · answer #8 · answered by Anonymous · 0⤊ 2⤋
not to mention it builds suspense and dread in needle-phobic patients.
2007-12-27 01:19:52 · answer #9 · answered by Brad B 3 · 1⤊ 0⤋
to get rid of the air. if air is injected, it can cause emboli and may cause death.
2007-12-27 09:26:11 · answer #10 · answered by smile 5 · 0⤊ 2⤋