Why might the harpoon of the syringe become disengaged during aspiration?

Question

Quizplus · Accepted Answer

The harpoon of the syringe may become disengaged during aspiration due to clinician technique (such as improper angle or movement during aspiration), dullness of the needle (which can cause it to slip out of the vein), or improper syringe set-up (such as a loose or ill-fitting connection between the needle and syringe). Therefore, all options listed could contribute to this issue.

Why Might the Harpoon of the Syringe Become Disengaged During