公开(公告)号：WO1989008425A1

公开(公告)日：1989-09-21

申请号：PCT/US1989001075

申请日：1989-03-16

Applicant: GMS ENGINEERING CORPORATION ,  SAMARAS, George, M. ,  FALK, Steven, M.

Inventor： GMS ENGINEERING CORPORATION

IPC: A61B05/02

CPC classification number: A61B5/022 ,  A61B5/7239

Abstract: A noise-immune blood pressure measurement system (Figure 1) filters out high frequency noise and blood pulses. The system also recognizes and filters out slow, large noise signals (40) in the range of 0.5Hz. Such noise signals result when a patient wearing the system makes slow, large finger movements, or is slowly transported by a vehicle over a large bump, for instance. The system accurately derives systolic (48), mean arterial (52), and diastolic pressures even when used in a noisy emergency vehicle or battlefield situation.

公开(公告)号：WO1987002232A1

公开(公告)日：1987-04-23

申请号：PCT/US1986002036

申请日：1986-10-01

Applicant: GMS ENGINEERING CORPORATION

Inventor： GMS ENGINEERING CORPORATION ,  SAMARAS, George, M. ,  BLAUMANIS, Otis, R. ,  VAN HORN, H., William

IPC: A61B05/02

CPC classification number: A61B5/02141 ,  A61B5/022 ,  A61B5/7239

Abstract: An apparatus and method for non-invasive, noise insensitive blood pressure determination which is useful in a battlefield or emergency vehicle environment. The system features an occlusion bladder (10) and a sensing bladder (12) both adapted to fit over the limb (8) of a patient. The pressure in the occlusion bladder (10) is raised to a value which prevents flow and is then gradually decreased. The pressure in both bladders is monitored. When the pressure in the sensing bladder (12) reaches a minimum value, the pressure in the occlusion bladder (10) is equal to the systolic pressure. The first, second and third time derivatives of the pressure in the sensing bladder are monitored. The first derivative is useful in identifying the minimum in the pressure in the sensing bladder (12). When the third time derivative of the pressure in the sensing bladder (12) passes through zero, the pressure in the occlusion bladder (10) is equivalent to the mean arterial pressure. The diastolic pressure can be calculated from the values of the systolic and mean arterial pressures.