Mindray VS 8A, Operator'S Manual

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11 - 6
•
The operator should not touch the cuff or tubing during NIBP measurement.
•
Other factors that have been shown to result in an overestimation of blood
pressure are labored breathing, full bladder, pain etc.
11.6.2 Placing the NIBP Cuff
To place the NIBP cuff, follow this procedure:
1. Verify that the patient category setting is correct. If not, enter the Patient
Management menu to change patient category. For more information, see
4.2.2 Editing Patient Information .
2. Connect the air tubing to the NIBP connector on the monitor.
3. Select an appropriate cuff for the patient, and then wrap it around the limb
directly over the patient’s skin as follows:
a If your monitor is using inflation algorithm, select cuffs with the
symbol. Using other cuff may lead to incorrect or failed measurements.
b Determine the patient
’
s limb circumference.
c Select an appropriate cuff by referring to the limb circumference marked on
the cuff. The width of the cuff should be 40% (50% for neonates) of the limb
circumference, or 2/3 of the length of the upper arm or the thigh. The
inflatable part of the cuff should be long enough to encircle at least 50% to
80% of the limb.
d Apply the cuff to the patient
’
s upper arm or leg and make sure the Φ
marking on the cuff matches the artery location. The cuff should fit snugly,
but with enough room for two fingers to be placed between the cuff and the
patient
’
s arm (on adults), and loosely on neonates with little or no air present
within the cuff. Otherwise it may cause discoloration and ischemia of the
extremities. Make sure that the cuff index line falls within the range
markings on the cuff.
e Middle of the cuff should be at the level of the right atrium of the heart. If it
is not, you must use the measurement correction formula to correct the
measurement. For more information, see
11.8.9 Correcting the NIBP
Measurements .
4. Connect the cuff to the air tubing. Avoid compression or restriction of pressure
tubes. Air must pass unrestricted through the tubing.
CAUTION
•
A wrong cuff size and a folded or twisted bladder can cause inaccurate
measurements.
•
Do not touch or apply external pressure against the cuff and air tubing
during NIBP measurement. This may cause inaccurate blood pressure values.