Surgery – Truss – Pad
Patent
1990-01-31
1991-08-20
Cohen, Lee S.
Surgery
Truss
Pad
128672, 128675, 128748, 604 66, 600 17, A61B 502, A61N 136
Patent
active
050405365
ABSTRACT:
Apparatus and method for detecting changes in the posture of a patient. Two pressure sensors are chronically implanted at different places in the cardiovascular system. One may be positioned in the right heart, for example, and the other placed in the inferior vena cava. The positioning is selected for ease of chronic implantation. However, the positions chosen must be such that the differences in pressure with changes in posture are differentially measurable. The differences in pressure changes sensed at the two positions enable electronic circuitry to determine changes in posture of the patient. These changes in posture may be used to indicate associated physiological changes such as increased or decreased demand on the cardiovascular system or changes in other homeostatic functions. Compensation for this changing cardiovascular or other homeostatic functions may be partially met through increasing or decreasing the escape interval of a demand cardiac pacemaker or by altering the drug delivery regimen of an implantable drug dispenser.
REFERENCES:
patent: 4052991 (1977-10-01), Zacouto
patent: 4566456 (1986-01-01), Koning et al.
patent: 4777951 (1988-10-01), Cribier et al.
patent: 4802481 (1989-02-01), Schroeppel
patent: 4886064 (1989-12-01), Strandberg
patent: 4932408 (1990-06-01), Schaldach
Cohen Lee S.
Medtronic Inc.
Pfaffle K. M.
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