The Accuracy and Performance of the A&D TM 2421, a New Ambulatory Blood Pressure Monitoring Device Based
on the Cuff-Oscillometric Method and the Korotkoff Sound Technique (original) (raw)
Journal Article
1
Department of Medicine, Tohoku University School of Medicine
,
Sendai,
Japan
.
Address correspondence and reprint requests to Yutaka Imai, MD,
The Second Department of Medicine, Tohoku University School of Medicine
,
1-1 Seiryomachi, Aobaku, Sendai, 980 Japan
.
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Department of Medicine, Tohoku University School of Medicine
,
Sendai,
Japan
.
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1
Department of Medicine, Tohoku University School of Medicine
,
Sendai,
Japan
.
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1
Department of Medicine, Tohoku University School of Medicine
,
Sendai,
Japan
.
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1
Department of Medicine, Tohoku University School of Medicine
,
Sendai,
Japan
.
Search for other works by this author on:
1
Department of Medicine, Tohoku University School of Medicine
,
Sendai,
Japan
.
Search for other works by this author on:
1
Department of Medicine, Tohoku University School of Medicine
,
Sendai,
Japan
.
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1
Department of Medicine, Tohoku University School of Medicine
,
Sendai,
Japan
.
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2
Kojinkai Hospital
,
Sendai
,
Japan
.
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Kojinkai Hospital
,
Sendai
,
Japan
.
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Published:
01 October 1992
Cite
Yutaka Imai, Shuichi Sasaki, Naoyoshi Minami, Masanori Munakata, Junichiro Hashimoto, Hiromichi Sakuma, Mariko Sakuma, Noriko Watanabe, Keiko Imai, Hiroshi Sekino, Keishi Abe, The Accuracy and Performance of the A&D TM 2421, a New Ambulatory Blood Pressure Monitoring Device Based on the Cuff-Oscillometric Method and the Korotkoff Sound Technique, American Journal of Hypertension, Volume 5, Issue 10, October 1992, Pages 719–726, https://doi.org/10.1093/ajh/5.10.719
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Abstract
The accuracy and performance of the A&D TM 2421, a new ambulatory blood pressure (BP) monitoring device using both the cuff-oscillometric method (O) and the Korotkoffsound method (K) were evaluated. The device was tested for accuracy under static and dynamic conditions by simultaneous comparison with two observers using a standard mercury column sphygmomanometer (standard method) and by the objective recording method (ORM). The performance of the device was also evaluated under ordinary ambulatory conditions. The mean differences in BP of standard method from K-method were −1.2 ± 4.7 mm Hg systole and 1.3 ± 4.7 mm Hg diastole (n = 323, mean ± SD) and those of standard method from Omethod were −0.4 ± 5.3 mm Hg systole and 1.4 ± 5.1 mm Hg diastole (n = 323). The agreement between each of the two methods of the device and the standard method was within 10 mm Hg for more than 90% of both systolic and diastolic readings. During bicycle exercise, the mean differences in BP of standard method from K-method were ࢤ3 . 4 ± 4.8 mm Hg systole and 1.8 ± 5.2 mm Hg diastole (n = 71) and those of standard method from O-method were −1.1 ± 7.3 mm Hg systole and 1.7 ± 7.8 mm Hg diastole (n = 67). There was a greater scatter in the individual comparisons of the device and the standard method during exercise, especially in diastolic BP. The relation between the device and ORM was almost similar to that between the device and the standard method. In 130 subjects the mean ambulatory monitoring period with the TM 2421 was 23.7 ± 0.6 h. In the K-method the error codes (failed recordings) were given as 13.0% of measurements, while in the O-method it was 4.3%. When the data obtained by the K-method were added to the failures in the O-method, only 1% of expected recordings had failed. The results suggest that the A&D TM 2421 unit is valid for clinical and research study. Am J Hypertens 1992;5:719-726
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© American Journal of Hypertension, Inc. 1992
Topic:
- ambulatory monitoring
- blood pressure
- exercise
- ambulatory blood pressure monitoring
- diastole
- mercury
- blood pressure devices
- systole
- korotkoff sounds
- diastolic blood pressure
- medical devices
- bicycle exercise
- catheter cuffs
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