초록 ▼

An autotransfusion device having a rigid cylindrical housing with an end wall, a movable piston located in the housing, and a deformable collection bag attached between the end wall and the piston is disclosed. When the piston is moved towards the end wall, collapsing the collection bag, the piston

An autotransfusion device having a rigid cylindrical housing with an end wall, a movable piston located in the housing, and a deformable collection bag attached between the end wall and the piston is disclosed. When the piston is moved towards the end wall, collapsing the collection bag, the piston is rotated to twist the collection bag and prevent the collection bag from being seized between the housing wall and the piston. The autotransfusion device also includes an automatic air purge unit and an auxiliary air purge unit which is used when the automatic air purge unit malfunctions. In order to facilitate the filling of the collection bag to capacity, a length to diameter ratio of 1.1 is preferred.

대표청구항 ▼

An autotransfusion device for collecting blood from a pool in a patient and for subsequently returning the collected blood to the circulatory system of the patient comprising: a rigid cylindrical housing having an end wall and a side wall; a movable piston located in said housing; a generally cylind

An autotransfusion device for collecting blood from a pool in a patient and for subsequently returning the collected blood to the circulatory system of the patient comprising: a rigid cylindrical housing having an end wall and a side wall; a movable piston located in said housing; a generally cylindrical, deformable collection bag located in said housing, the peripheral ends of said collection bag being attached, respectively, adjacent the periphery of said end wall and the periphery of said piston such that a collection chamber is formed between said end wall, said piston and said collection bag; aspirator means for connecting said collection chamber to a source of suction and to the pool of blood; outlet means for connecting said collection chamber to the circulatory system of the patient; resiliency means located in said housing for resiliently urging said piston towards said end wall and collapsing said collection bag; locking means for releasably locking said piston spaced from said end wall during collection of the blood from the pool such that after said collection bag is adequately filled, said locking means is released to force the collected blood from said collapsing collection bag to the circulatory system of the patient as said piston is urged by said resiliency means toward said end wall; and guide means for rotating said piston about the longitudinal axis of said housing as said piston moves toward said end wall such that said collection bag is correspondingly twisted as said collection bag is collapsed so that said collection bag is prevented from becoming inadvertently trapped between said side wall and said piston.