Positive pressure equipment for avoiding phenomenon of aspiration of blood inside catheter during withdrawal of needle of chemotherapy from patient in hospital, has elastic flexible tank whose internal volume is reduced to minimum

摘要

The equipment has an elastic flexible tank receiving liquid i.e. physiological serum, by a filling element i.e. syringe, via an standard connection element i.e. cone, where the flexible tank is equipped with a device i.e. internal device, having mechanical force necessary and sufficient to cause a deformation of the flexible tank by modification or extension of initial form of the flexible tank. The internal volume of the flexible tank is reduced to minimum for draining of the flexible tank into a pipe.