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The prick versus the time

Hi everyone- this isn't a ground breaking question, but it is something that can cause discomfort everyday, multiple times- injections!  Does anyone know of any research indicating whether or not an animal reacts more to a 25G needle with a longer injection time versus a larger needle (22G, sometimes 20G if it is large dose of a thicker drug SQ, such as Pen. G on a 60lb lab), but a shorter injection time?  Our hospital seems split down the middle, with doctors and techs on both side. 

I personally am for the larger fresh needle.  I feel less squirming is involved, because it is quicker.  Tom cat skin, wrinkled skin, or larger dogs injections seem to go intradermal with the shorter 25G needles.  Kittens and puppies are small, but personally they seem to act up more for the restraint, even when giving them a treat to distract them, then they do with the needle poke.  I also feel I have to use more force to poke with a 25G needle, especially with larger pets.  I am ok using 25G with less resistant IV or quick blood draws for a glucose sample, but for IM injections, even the smallest amount, sometimes I have problems with the pressure used to adminster the drug, and loose the syringe (we only have luer locks on 3cc and above.)   

My 25G needle loving coworkers say I just have to work on technique, and in their opinions, the animals do not seem to notice the prick at all when done right.  They do use a 22G with more than 1cc with thicker or IM injections. 


May. 28th, 2011 07:48 pm (UTC)
Here's my take:
Subcutaneous fluids? Bigger needle, faster injection. You're going to be a few minutes anyway. I usually used 18 ga unless the patient was a tiny neonate.

Watery liquid injectables like vaccines, giving less than 2 cc, use a 25 ga. needle. If it is a larger volume I'll use a 22 ga.

Thick substances, like percorten or corticotropin gel, use the larger needle, period; you'll be there all day if you don't.

I don't think there should be a hard and fast rule; I think it is good to use common sense. *shrug*