Surgery – Truss – Perineal
Patent
1977-11-07
1980-05-27
Kamm, William E.
Surgery
Truss
Perineal
A61H 3100
Patent
active
042045240
ABSTRACT:
Method and apparatus for controlling in-series cardiac assist devices which uses the afterload phase angle as the operating criterion. The phase of the pump driving waveform is controlled with a single adjustment. The time interval from the R-wave to midpump systole is used and the phase angle of the pump driving waveform is determined only by this control parameter. The duration of pump systole is thus symmetric about the TMPS adjustment and can be changed without disturbing this phase angle.
REFERENCES:
patent: 3750644 (1973-08-01), Ragsdale
patent: 3783453 (1974-01-01), Bolie
patent: 3835845 (1974-09-01), Maher
patent: 3871360 (1975-03-01), Van Horn et al.
patent: 3985123 (1976-10-01), Herzlinger et al.
patent: 4016871 (1977-04-01), Schiff
patent: 4023563 (1977-05-01), Reynolds
patent: 4051841 (1977-10-01), Thoma
Jaron Dov
Martin Peter J.
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