Force d’expulsion ou d’aspiration

(En anglais seulement) Syringes are tested to quantify the force necessary to activate the plunger and express or aspirate fluid from, or to, the barrel (break-away force, glide force, etc). These forces depend on factors such as materials used, viscosity of the liquid, sterilization technique, etc. Also, when the fluid is injected, the properties of the host tissue must be considered.