Nice idea but aspiration does not necessarily prevent inadvertent intravenous injection and may not even prevent inadvertent intravenous injection.
Here is a reasonable review article on preinjection aspiration.
Let’s say there was negative aspiration
prior to injection, what is to say that the needle tip is not intravenous
during injection
Let’s use adrenaline as an example. Adrenaline is used by many non medical people to treat acute anaphylaxis - the EpiPen is one brand. Kids bring it with them to school and teachers administer it.
Inadvertent intravenous adrenaline can cause dangerous effects on the heart. So aspiration prior to injection is theoretically good.
You would be interested to know that the EpiPen provides NO ability for aspiration as it is an auto injection system.
Bottom line: Aspiration does not eliminate inadvertent intravenous injection. The needle can be intravenous and get a negative aspiration - yes it can. The needle may not be intravenous initially but the act of aspiration moves the needle slightly so that it becomes intravenous during injection.
How common is the risk of inadvertent injection?