Haemonetics Corporation

Russell L Herrig

Paul M Volpini

Joseph M Medberry

Joseph R Plante

David Barone

Alan L Stenfors

Edward W Kaleskas

Frank J Anderson

Ronald Porreca

Norbert J Comeau

Robert Vandor

A method of washing salvaged blood includes separating higher density blood components from lower density blood components within a rotating centrifuge bowl. The separated blood components are washed with wash solution to remove free hemoglobin (Hgb), anticoagulant, cellular debris and other undesirable elements from the blood components. The previously separated blood components are re-suspended by braking the rotation of the centrifuge bowl to release the free Hgb, and other undesirable elements trapped in the red blood cell layer. The higher density blood components are then re-separated from the lower density blood components within the centrifuge bowl. The re-separated blood components are again washed with wash solution to further remove free Hgb and other undesirable elements from the blood components.

Two-stage cell wash process controlled by optical sensor

A volume sensor is described for automating an extracorporeal system used for the recovery and concentration of salvaged blood. The system includes a disposable plastic reservoir in which blood is collected from the surgical site and stored for processing. Volume is sensed in one embodiment by a strain gage device which is sensitive to vertical forces. In another embodiment volume is sensed by measuring the transit time of an ultrasonic pulse-echo signal generated by piezoelectric transducer.

Reservoir volume sensing systems for autologous blood recovery

A fluid flow apparatus includes a peristaltic pump rotor mounted to a deck module assembly. A disposable software set is provided which includes a cassette which has a primary flexible tube and a pump platen adjacent to which the primary flexible tube resides. Tubing with blood processing bags are coupled to the manifold along with the input port of the rotor of a disposable blood processing centrifuge bowl. The software set also includes a three-to-one manifold which connects the primary tube to a plurality of secondary flexible tubes. Fluid flow through the secondary flexible tubes is controlled by a plurality of pinch valves which pinch the secondary tubes closed against closing surfaces on the cassette. A deck module assembly allows a user to properly secure the cassette relative to the pump rotor and the pinch valves. A flat surface is provided on the manifold to couple sonic radiation into the manifold and sense the presence of fluids therein.

Blood processing method and apparatus with disposable cassette

A fluid flow apparatus includes a peristaltic pump rotor mounted to a deck module assembly. A disposable software set is provided which includes a cassette which has a primary flexible tube and a pump platen adjacent to which the primary flexible tube resides. Tubing with blood processing bags are coupled to the manifold along with the input port of the rotor of a disposable blood processing centrifuge bowl. The cassette is removably secured to the hardware apparatus such that the flexible tube contacts both the platen of the cassette and the rollers of the pump rotor. The pump rotor is rotated to induce a fluid flow through the primary flexible tube. The software set also includes a three-to-one manifold which connects the primary tube to a plurality of secondary flexible tubes. Fluid flow through the secondary flexible tubes is controlled by a plurality of pinch valves which pinch the secondary tubes closed against closing surfaces on the cassette. A deck module assembly allows a user to properly secure the cassette relative to the pump rotor and the pinch valves.

Growing community of inventors

Sharon, MA, United States of America

Russell L Herrig