Datex-Ohmeda S/5 monitors
Document No. 800 1012-1
6
2.1.3
Invasive blood pressure measurement
To measure invasive blood pressure, a catheter is inserted into an artery or vein. The invasive
pressure setup, consisting of connecting tubing, pressure transducer, an intravenous bag of normal
saline all connected together by stopcocks, is attached to the catheter. The pressure transducer is
placed at the same level with the heart, and electrically zeroed.
The pressure transducer is a piezo-resistive device that converts the pressure signal to a voltage.
The monitor interprets the voltage signal so that blood pressure data and blood pressure
waveforms can be displayed.
2.2
Main components
The Cardiac Output Module, M-COP consist of a COP circuit board and two input boards - a CO
input board and a P input board, attached to the front panel.
The Cardiac Output and SvO
2
Module
,
M-COPSv, consist of a COPSv circuit board and three input
boards - a CO input board, a SvO
2
input board and a P input board, attached to the front panel.
The front panels are shown in figure 3.
P4
1
2
3
4
5
C.O.
P4
C.O.
SvO
2
6
M-COP
M-COPSv
Figure 3
Front panels of Cardiac Output Modules, M-COP and M-COPSv
(1)
Key for pressure zeroing (Zero P4)
(2)
Key for cardiac output measurement (Start C.O.)
(3)
Connector for invasive blood pressure measurement
(4)
Connector for C.O. self test
(5)
Connector for C.O. measurement
(6)
Connector for SvO
2
measurement
