Apparatus and method for reduction in respiration artifact in pu

Details Apparatus and method for reduction in respiration artifact in pu Apparatus and method for reduction in respiration artifact in pu

1983-11-14

1987-05-26

Howell, Kyle L.

Surgery

Truss

Pad

128687, A61B 502

Patent

active

046676805

ABSTRACT:
Apparatus is disclosed for deriving weighted values SHD i, DHD i and MHD i to respectively represent the systolic, diastolic and mean blood pressures for each heartbeat of a patient from the values S.sub.i, D.sub.i and M.sub.i that are the maximum, minimum and means blood pressures of the current heartbead; S.sub.i-1, D.sub.i-1 and M.sub.i-1 that were the maximum, minimum and mean blood pressures for the previous heartbeat; SHD i-1, DHD i-1 and MHD i-1 that respectively represented the systolic, diastolic and means blood pressures of the previous heartbeat; and a constant K.sub.i that is a function, F, of the difference between M.sub.i and the mean pressure M.sub.i-1 of the previous heartbeat. The expressions for S.sub.i, D.sub.i, M.sub.i and K.sub.i are as follows: ##EQU1##

REFERENCES:
patent: 4140110 (1979-02-01), Jansen et al.
patent: 4190886 (1980-02-01), Sherman
patent: 4223681 (1980-09-01), Sherman

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