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T1 Quick Reference Guide

of BP (systolic and diastolic) while too large a cuff results in the

underestimation of BP. Errors in the 10 to 40 mmHg range can occur.

Ensure that the cuff is wrapped directly over the patient’s skin. BP

measurement could be 10 to 40 mmHg higher or lower than actual when the

cuff is applied over clothing.

  • Thecuffshouldbeappliedsothatthecenterofthebladderinthecuff

is over the brachial artery. Use the reference marker for this.

  • Forbestresults,thecuffshouldbeplacedonthearmatheartlevel

and the lower arm supported passively. Published data indicates that

BP can increase about 2 mmHg for every inch that the cuff is below

heart level and decrease by the same amount if above heart level.

  • Avoidcompressionorrestrictionofthepressurehose.Donotplace

the NIBP cuff on a limb that is being utilized for any other medical

procedure, for example, an I.V. catheter.

  • HavethepatientsitquietlyforseveralminutesbeforeBP

measurement and remain still during measurement to avoid

unnecessary motion artifact. If the patient has not rested before

measurement, BP could be elevated by 10 to 20 mmHg.

  • DonottalktothepatientduringBPmeasurementastalkinghasbeen

shown to result in a 10 to 15 mmHg overestimation of BP.

  • Thepatient’sbackandfeetshouldbeproperlysupportedwiththe

legs kept uncrossed. Unsupported back and feet could increase BP

by up to 15 mmHg, while crossed legs could result in a 4 to 12 mmHg

increase.

  • Otherfactorsthathavebeenshowntoresultinanoverestimationof

BP are labored breathing (5 to 8 mmHg), full bladder (10 to 15 mmHg),

pain (10 to 30 mmHg).

Guidance Table

Cuff Description Limb Circumference

Child 10 - 19 cm

Small Adult 18 - 26 cm

Adult 25 - 35 cm

Large Adult 33 - 47 cm

Mindray T1 Quick Reference Guide

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