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Inflationary oscillometry provides accurate measurement of blood pressure in pre-eclampsia

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Abstract:

Objective

To evaluate the accuracy of the OMRON-MIT inflationary oscillometric device for blood pressure measurement in pregnancy and pre-eclampsia. Design

Prospective observational study, using validation methods recommended by the British Hypertension Society (BHS) and the Association for the Advancement of Medical Instrumentation (AAMI). Settings

Antenatal clinics and ward, Guy's Hospital, London. Population

Normotensive pregnant women and those diagnosed with pre-eclampsia according to the definition of the International Society for the Study of Hypertension in Pregnancy. Methods

Validation according to BHS protocol. Main outcome measures

Proportion of readings within 5, 10 and 15 mmHg (absolute differences) between the automated device and two trained, blinded observers, according to the BHS and AAMI criteria. Results

The OMRON-MIT achieved an overall BHS grade B for systolic and grade A for diastolic blood pressure measurement in both pregnancy and pre-eclampsia. The mean (SD) differences between the standard and the test device were −5 (7) mmHg for systolic and 2 (6) mmHg for diastolic blood pressure in pregnancy and −4 (6) mmHg for systolic and 2 (7) mmHg for diastolic blood pressure in pre-eclampsia. This device therefore fulfils the AAMI criteria. Conclusion

The OMRON-MIT is the only automated oscillometric device that has proven to be accurate for blood pressure measurement in pre-eclampsia according to the BHS protocol in pregnancy. Inflationary oscillometry may correct the error associated with oscillometric devices in pre-eclampsia.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1471-0528.2002.01487.x

Publication date: October 1, 2002

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