gmomanometers. Staff knowledge about manual devices was adequate as was their ability to accurately measure blood pressure using standardised videotape. Forty-two per cent of 31 nurses who completed the test were correct in 9 of 12 blood pressures. A comparison of this result with a comparable group of nurses tested in 1990 did not detect a significant change in competence. Direct evaluation of the commonly used Dinamap 8100 in 47 hospital patients demonstrated a poor correlation with a mercury sphygmomanometer with a D grade (fail) for systolic and a C grade for diastolic pressure. In summary, maintenance of manual sphygmomanometers was very poor, probably due to their lack of use by clinical staff. This was particularly true for units attached to bedside walls. Nursing staff demonstrated significant deficiencies in manual sphygmomanometer use although their skills were similar to those measured several years earlier. Because of the demonstrated inaccuracy of the Dinamap 8!
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