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October 1, 1992American Journal of Hypertension

The Accuracy and Performance of the A&D TM 2421, a New Ambulatory Blood Pressure Monitoring Device Basedon the Cuff-Oscillometric Method and the Korotkoff Sound Technique

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Why the study?

Does the A&D TM 2421 ambulatory blood pressure monitoring device accurately measure blood pressure compared to a standard mercury sphygmomanometer?

Population

Subjects undergoing blood pressure measurement

Comparison

A&D TM 2421 ambulatory blood pressure monitoring… vs Standard mercury column sphygmomanometer and…

Design

Other

Key result

The A&D TM 2421 ambulatory blood pressure monitor demonstrated agreement within 10 mm Hg of the standard mercury sphygmomanometer for over 90% of systolic and diastolic readings.

Authors

YIYutaka ImaiSSShuichi SasakiNMNaoyoshi Minami

Discussion

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Overview

Supports ambulatory BP device selection; leaves open need for larger validation across populations and conditions.

Key Points

  • This research aims to assess the accuracy and performance of the A&D TM 2421 blood pressure monitoring device using two measurement techniques.
  • Evaluated using simultaneous comparisons to a mercury sphygmomanometer and objective recording method (ORM).
  • Tested under both static (ordinary) and dynamic (exercise) conditions.
  • Data collection included 323 readings under regular conditions and separate readings during bicycle exercise.
  • Mean differences from the standard method: K-method -1.2 mm Hg systole, 1.3 mm Hg diastole; O-method -0.4 mm Hg systole, 1.4 mm Hg diastole (n=323).
  • During exercise, K-method showed -3.4 mm Hg systole, 1.8 mm Hg diastole; O-method showed -1.1 mm Hg systole, 1.7 mm Hg diastole (n=71).
  • Over 90% of readings from both methods were within 10 mm Hg of the standard method in ambulatory conditions.

Study Design

Type

Observational

Structured PICO

Does the A&D TM 2421 ambulatory blood pressure monitoring device accurately measure blood pressure compared to a standard mercury sphygmomanometer?

P
Population
Subjects undergoing blood pressure measurement (n=323 readings for static conditions, n=71 for exercise conditions)
E
Exposure
A&D TM 2421 ambulatory blood pressure monitoring device (using cuff-oscillometric and Korotkoff sound methods)
C
Comparator
Standard mercury column sphygmomanometer and objective recording method (ORM)
O
Outcome
Mean differences in systolic and diastolic blood pressuresurrogate

The A&D TM 2421 ambulatory blood pressure monitoring device demonstrates acceptable accuracy compared to standard mercury sphygmomanometry under static conditions, though variability increases during exercise.

Limitations

  • Greater scatter in the individual comparisons of the device and the standard method during exercise, especially in diastolic BP

Cite This Study

Imai et al. (1992) reported an observational. A&D TM 2421 ambulatory blood pressure monitoring device vs. Standard mercury column sphygmomanometer was evaluated on Accuracy of blood pressure measurement (mean difference from standard method). The A&D TM 2421 ambulatory blood pressure monitor demonstrated agreement within 10 mm Hg of the standard mercury sphygmomanometer for over 90% of systolic and diastolic readings.

synapsesocial.com/papers/6a2257903dc1edca6bb60288https://doi.org/10.1093/ajh/5.10.719
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