CNSystems CNAP Monitor 500 HD, Руководство оператора

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NBP
CNAP
®
Monitor 500 Page 9-1 Version 5.2.5,
h
21-FHZU-10002
9 CNAP
®
9.1 General information
CNAP
®
- Continuous Non-Invasive Arterial Blood Pressure – is a non-invasive method for measur-
ing the continuous blood pressure waveform in adult and pediatric patients from the age of 4
years.
A patient's blood pressure waveform is recorded by the CNAP
®
Monitor 500 by means of a double
finger cuff with an integrated IR light sensor and air chambers. The measured IR signal – similar to
a pulse oximeter – helps to measure the blood volume in the finger, which is kept constant by
means of CNAP
®
: beat-to-beat counter pressure is built up in the CNAP
®
finger cuff, which fluc-
tuates between the systolic and diastolic blood pressure.
Illustration 41: CNAP
®
Technology
By means of a NBP cuff (oscillometric blood pressure measurement), the relatively measured blood
pressure in the finger is calibrated to absolute blood pressure values (to the pressure of a big ar-
tery at heart level), thus ensuring absolute accuracy. The NBP cuff can be placed on the patient's
upper arm either on the same (ipsilsateral) or on the other (contralateral) arm as the CNAP
®
double finger cuff. NBP measurement is essential to ensure absolute accuracy of the recorded
blood pressure values.
CAUTION:
•
The accuracy of the CNAP
®
measurement depends on the accuracy of the accompa-
nying NBP measurement, which is particularly important during calibrations or before
interventions.
•
Make sure that no movement artifacts occur during measurement, especially during
and until approx. 2 min. after measurement initialization.
•
Powerful light sources (e.g. cameras with flashlight) may affect the CNAP
®
measure-
ment and cause artifacts.
CAUTION:
•
Movements of the patient, which result in changes of position of the CNAP
®
double
finger cuff regarding heart level, will have immediate influence on the absolute values
of blood pressure readings. To compensate these physical effects (hydrostatic
height), recalibrate the CNAP
®
measurement by triggering a single NBP measurement
(see chapter 10.6 - NBP options) or use the options to manually enter BP calibration
values or the height offset (see chapter 4.2.2 and 4.2.3).
Distributed by BIOPAC Systems, Inc. Manufactured by CNSystems AG