Patent ID: 8419672

Claim:
A system of cannulation for perfusing a patient's circulatory system, said system comprising: an inflow continuous access device comprising: a cannula housing with a first end adapted to extend through the skin line and penetrate the subcutaneous tissue to provide an access opening to the circulatory system, and with a closed second end defining a cavity within the cannula housing; an outflow port provided between the access opening and the cavity and adapted to be connected to an input of a blood pump; and a plunger stem provided to project into the cannula housing through the closed second end thereof, the plunger stem having a head which is slidably movable with the plunger stem between a closed position closing said access opening and an open position, positioned in the cavity, in which flow from said access opening to said outflow port is allowed; an outflow continuous access device comprising: a cannula housing with a first end adapted to extend through the skin line and penetrate the subcutaneous tissue to provide an access opening to the circulatory system, and with a closed second end defining a cavity within the cannula housing; an inflow port provided between the access opening and the cavity and adapted to be connected to an output of the blood pump; and a plunger stem provided to project into the cannula housing through the closed second end thereof, the plunger stem having a head which is slidably movable with the plunger stem between a closed position closing said access opening and an open position, positioned in the cavity, in which flow from said inflow port to said access opening is allowed; whereby blood flow from the pump is in series with the normal blood flow of the circulatory system of the patient and creates a localized region of hypertension.