Types of Blood Pressure Measuring Instruments

Types of Blood Pressure Measuring Instruments

 

blood_pressure_measuremnt

 

Mercury Sphygmomanometer vs Aneroid Sphygmomanometer vs Digital Blood Pressure Monitor

Recommendations for Blood Pressure Measurement in Humans and Experimental Animals American Heart Association

Abstract
What Is Normal Home Blood Pressure?
Home blood pressures are consistently lower than clinic pressures in most hypertensive patients. Several recent studies have addressed the question of the level of home pressure that best corresponds to a normal clinic pressure of 140/90 mm Hg. The largest, the Ohasama study, proposed a level of 137/84 mm Hg as an acceptable upper limit for home readings on the grounds that cardiovascular risk increases above this level. An ad hoc committee of the American Society of Hypertension, reviewing several studies, recommended 135/85 mm Hg as the upper limit of normal for home and ambulatory blood pressure.137 As with office blood pressure, a lower home blood pressure goal is advisable for certain patients, including diabetic patients, pregnant women, and patients with renal failure……
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Principles and techniques of blood pressure measurement
US National Library of Medicine – National Institutes of Health

Abstract
Although the mercury sphygmomanometer is widely regarded as the “gold standard” for office blood pressure measurement, the ban on use of mercury devices continues to diminish their role in office and hospital settings. To date, mercury devices have largely been phased out in US hospitals. This has led to the proliferation of non-mercury devices and has changed (probably for ever) the preferable modality of blood pressure measurement in clinic and hospital settings……
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Basic techniques of blood pressure measurement includes;
(US National Library of Medicine – National Institutes of Health)
1. Location of measurement
2. The auscultatory method
3. The oscillometric technique
4. Ultrasound techniques
5. The finger cuff method of Penaz
6. Technical issues with measurement from the arm
6a. Effects of posture
6b. Body position
7. Cuff-inflation hypertension
8. Cuff size
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Choose Your Blood Pressure Monitor Wisely

Kinds of Blood Pressure Monitors
1. The First Ones, the Mercury Filled:   Mercury17_transp
2. Aneroid   aneroid_transp
3. Digital digital  digital15_transp

Recommendation posted by Vincent R. Moloney MD, the author
At first I thought to choose a mercury device, mainly for accuracy, but the aneroids are nearly as accurate and smaller, lighter, more portable and less expensive. Having them calibrated once a year should take care of the reliability issue.

The digital monitors have improved a lot and are tops for convenience and ease of use. In fact, after you place the cuff on your arm it does the rest.

I now recommend both the aneroid and selected digitals. “I am beginning to think that the good digitals are the best all-around choice for the non-professional.”

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Blood Pressure Monitoring with Home Monitors versus Mercury Sphygmomanometer
By Ann Pharmacother. 2001 Jul-Aug;35(7-8):817-22.
US National Library of Medicine National Institutes of Health

CONCLUSIONS:
Compared with the mercury sphygmomanometer, the arm monitor was the most accurate in measuring blood pressure. The wrist and finger monitors resulted in statistically significant mean systolic and diastolic differences compared with the mercury sphygmomanometer.

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Sphygmomanometer
Mercury sphygmomanometers – Manual sphygmomanometers   clickhere_orange25

血壓計   clickhere_blue25

 

Blood pressure measurement – OSCE guide

 

OSCE (Objective Structured Clinical Examination)   clickhere_orange25
客觀結構化臨床考試   clickhere_red25

 

Harvard Health: Measuring blood pressure at home

 

How To Measure Wrist Blood Pressure from Monitor

 

How to Calibrate a Blood Pressure Cuff

 

How To Take Your Blood Pressure Accurately At Home

 

Learn to Measure Blood Pressure and Pulse