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Troubleshooting
13.3 Guidance for Reliable Performance
To improve the reliability of the results, the following points should be
noted:
• Mobile/smart phones etc, must be at least one metre away from the unit.
• The couch should be separated from adjacent walls etc. as pressure on the
arms or cuffs must be avoided.
• Check that the clothing is not too thick. The cuffs can be applied over thin
shirts and socks or tights. If in doubt, remove the socks.
• Always brief the patient before the test, explaining that the cuffs will tighten,
and that the test will take approximately 3 minutes to complete.
• The patient’s arms must be supported by the couch.
• The patient’s arms must be completely relaxed during the test and not
pulled tight against the body.
• The patient’s heels must be supported on the couch and not be allowed to
overhang the end.
• The cuffs must have the correct tension – a snug fi t (taught but not tight).
• The arm sense chamber must be located just below the elbow on the
largest diameter part of the forearm. The connecting strap between the two
chambers should not be fl at.
• The patient must lie supine, be relaxed, remain still, and refrain from
talking, coughing etc.
• The operator must not talk to the patient – this always prompts responses
from the patient.
• The operator must not touch the cuffs or knock the tubing during the test.
• When performing repeat tests on the same patient, allow at least 5 minutes
for stabilisation between tests.
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