I have probably pinned over 500 times and have never had any problem with blood entering the syringe, so obviously there is no need for me to aspirate.
That would be as dumb as saying I have made 500 passes in my outlaw 10.5 car with no crashes so I am going to quit wearing my 6 point harness and Hahns device LOL
The reason many medical professionals do not aspirate is because of the problems with patient compliance, IE the sooner they can mash the plunger and get the needle out the less chance of the patient screaming or jerking away during the injection. For us it makes a lot more sense to take our time aspirate and very slowly inject the AAS into our muscle to allow gradual absorption into the muscle.
Another important point on intramuscular AAS injections.
In addition if you inject slow and wait 10 seconds making sure the muscle is completly relaxed after the plunger has bottomed out to remove the needle then if you have pierced through a vein on the way into the muscle the amount of AAS forced from the depot to the vein will be minimal at best, whereas if you just ram it in, mash the plunger and jerk out, then the amount of pressure at the injection depot may be far greater than the pressure in the vein causing a large amount of AAS to migrate into the vein.




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