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Nurs Res. 1999 Mar-Apr;48(2):105-8.

The effects of crossed leg on blood pressure measurement.

Author information

1
Chicago Veterans Administration Health Care Systems, West Side Division, IL 60652, USA.

Abstract

BACKGROUND:

It is clear that numerous factors influence an individual's blood pressure measurement. However, guidelines for accurately measuring blood pressure inconsistently specify that the patient should keep feet flat on the floor.

OBJECTIVE:

To determine if the crossing of a leg at the knee during blood pressure measurement has an effect on the patient's blood pressure reading.

METHODS:

A convenience sample of 100 hypertensive male subjects was selected from various outpatient clinics in an inner-city acute-care veterans' hospital. The first 50 subjects positioned their feet flat on the floor while their blood pressure was measured. After 3 minutes, the blood pressure was measured again with the subject's leg crossed at the knee. The procedure was reversed for the second 50 subjects.

RESULTS:

The results indicated that both systolic and diastolic blood pressure increased significantly (p < .0001) with the crossed leg position.

CONCLUSION:

When blood pressure is measured, patients should be instructed to have feet flat on the floor to eliminate a potential source of error.

PMID:
10190837
[Indexed for MEDLINE]

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