I had been using plastic insulin syringes for almost half a century, and only today did I realize what sort of technology was in them to help me not waste insulin.
Those following vaccine technology, you may have read that some clever practitioners are able to get 6 or even 7 doses out of a nominal “5-dose” vial of vaccine.
Turns out, the trick is to use a “low dead space needle” which is what our plastic insulin syringes have been using all along. Other than plastic insulin syringes, it seems most syringes on the market are like the 3 ones on the left below, with a removable needle and a lot of “dead space” (red area) that is medicine that has to be drawn from the vial but can never be injected.
The fourth one below, is a depiction of a plain old plastic insulin syringe. No removable needle, very little wasted “dead space”.
Is there any reason that plain old plastic insulin syringes couldn’t be used to with vaccines? Is the needle not long enough? I am truly “old school” and until recently used the half-inch insulin syringe needles until my doc put me on pens just a couple years ago. But maybe a half inch isn’t long enough?