Apparatus and method for reduction in respiration artifact in pulmonary artery pressure measurement
US4667680A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 14, 1983 |
| Grant date | May 26, 1987 |
| Priority date | — |
| Expiry date | Nov 14, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/021
- WIPO fieldMedical technology
- WIPO sectorInstruments
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##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.