1
Alley Ralph D, Sheridan David S: Cardiovascular catheter. Sherwood Medical, Hofgren Wegner Allen Stellman & McCord, January 29, 1974: US3788328 (81 worldwide citation)

A cardiovascular catheter for use particularly in open heart surgery and related operations requiring varying forms of cardio-pulmonary bypass. The catheter has a fixed ring provided on the catheter proximal to drainage inlets and may have a sliding ring snug fit on the catheter proximal to the fixe ...


2
Alley Ralph D, Sheridan David S: Cardiovascular catheter. Sherwood Medical, Wegner Stellman McCord Wiles & Wood, September 9, 1975: US3903895 (66 worldwide citation)

A cardiovascular catheter for use particularly in open heart surgery and related operations requiring varying forms of cardio-pulmonary bypass. The catheter has a fixed ring provided on the catheter proximal to drainage inlets and may have a sliding ring snug fit on the catheter proximal to the fixe ...


3
Alley Ralph D: Suction drainage apparatus. September 11, 1973: US3757783 (45 worldwide citation)

Suction drainage apparatus for use in conjunction with vacuum sources of the type that may fail in either an 'open' or a 'closed' state. The system includes a trap chamber having an inlet adapted to be connected to a catheter for receipt in a body cavity and an outlet connected to a pressure regulat ...


4
Alley Ralph D, Sheridan David S: Catheter placement device and method. Sherwood Medical, January 11, 1972: US3633579 (43 worldwide citation)

A medical device for use in intravenous or intraarterial injections of fluids, in blood sampling, in diagnostic procedures such as intravascular blood sampling including sampling in the heart, and in intravascular pressure measurements using transducers. The device incorporates a novel catheter mean ...


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