Journal of Clinical and Diagnostic Research, ISSN - 0973 - 709X

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Original article / research
Year : 2018 | Month : August | Volume : 12 | Issue : 8 | Page : CC09 - CC12

Are Automated Blood Pressure Apparatus Reliable? Automated Versus Manual Measurement of Blood Pressure

K Madhan Srinivasan, K Senthil Kumar, I Saraswathi, A Lokeshwar Raaju, B Vishwanatha Rao

1. Medical Student, Madha Medical College and Research Institute, Chennai, Tamil Nadu, India. 2. Associate Professor, Department of Physiology, Meenakshi Medical College and Research Institute, Kanchipuram, Tamil Nadu, India. 3. Assistant Professor, Department of Physiology, Madha Medical College and Research Institute, Chennai, Tamil Nadu, India. 4. Medical Student, Madha Medical College and Research Institute, Chennai, Tamil Nadu, India. 5. Professor, Department of Physiology, Madha Medical College and Research Institute, Chennai, Tamil Nadu, India.

Correspondence Address :
Dr. K Senthil Kumar,
Associate Professor, Department of Physiology, Meenakshi Medical College and Research Institute, Kanchipuram, Tamil Nadu, India.
E-mail: drksk.cool@gmail.com

Abstract

Introduction: With hypertension becoming a global burden, it is necessary to validate the Blood Pressure (BP) recordings, used to screen and follow-up patients for hypertension. Since three different devices (mercury manometer, aneroid meter, and digital) are commonly used throughout the world, a study was proposed to compare the recordings of the three devices.

Aim: To evaluate the validity of aneroid and digital BP monitors as compared to mercury manometer.

Materials and Methods: BP was measured in 240 healthy subjects of both sex (Male=127, Female=113) using mercury manometer, aneroid and digital BP monitor from the same arm consecutively with five minutes interval between each recording. The data were analysed using SPSS 21, Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP) readings of aneroid and digital monitors were compared with mercury manometer. British Hypertension Society (BHS) protocol, Association for the Advancement of Medical Instrumentation (AAMI) standards and Bland Altman scatter plots were used to validate the aneroid and digital BP monitors.

Results: The difference in SBP measured using mercury manometer and aneroid meter was 0.6757.12 mmHg and mercury manometer and digital monitor was 1.6511.08 mmHg. The difference in DBP using mercury manometer and aneroid meter was 1.756.3 mmHg and mercury manometer and digital was 2.768.8 mmHg. While aneroid meter satisfied the AAMI criteria, digital monitor did not. The BHS grade for aneroid meter was C (poor) and digital D (very poor). According to Bland-Altman plot, the bias in SBP for aneroid was minimal with 0.675 (-13.28-14.63), for digital -1.41 (-21.66-18.84) and in DBP for aneroid was 1.75 (-10.6-14.1), for digital was the highest with 2.76 (-14.47-20.01).

Conclusion: BP measured using aneroid and digital monitors varied significantly from the mercury manometer and showed higher levels of inaccuracy and hence should be used with caution in clinical setting.

Keywords

Advancement of medical instrumentation, Bland-Altman scatter plots, British hypertension society , Validation

How to cite this article :

K Madhan Srinivasan, K Senthil Kumar, I Saraswathi, A Lokeshwar Raaju, B Vishwanatha Rao. ARE AUTOMATED BLOOD PRESSURE APPARATUS RELIABLE? AUTOMATED VERSUS MANUAL MEASUREMENT OF BLOOD PRESSURE. Journal of Clinical and Diagnostic Research [serial online] 2018 August [cited: 2018 Jul 18 ]; 12:CC09-CC12. Available from
http://jcdr.net/back_issues.asp?issn=0973-709x&year=2018&month=August&volume=12&issue=8&page=CC09-CC12&id=11868

DOI and Others

DOI: 10.7860/JCDR/2018/34993.11868

Date of Submission: Nov 29, 2017
Date of Peer Review: Feb 13, 2018
Date of Acceptance: May 18, 2018
Date of Publishing: Aug 01, 2018

FINANCIAL OR OTHER COMPETING INTERESTS: NONE.

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