Influence of Environment and Measurement Conditions on Blood Pressure During Self-Measurement Blood Pressure
Keywords:blood pressure, blood pressure measurement environment and conditions, blood pressure self measurement.
Background: Effective blood pressure (BP) monitoring outside medical office requires that each patient have
validated sphygmomanometer. Due to their relatively high expense, these sphygmomanometers remain little
or not accessible in our working context. When self-monitoring of blood pressure (SMBP) is prescribed in the
office, most patients go to private pharmacies where BP measurements are influenced by environment and
Aim: To determine influence of environment and measurement conditions on BP during SMBP in healthy
sedentary people in order to describe reality of practice of this method in our working context.
Method: Prospective experimental transversal study including 174 volunteers (47 women), aged 18 to 25
years. Systolic BP (SBP), diastolic BP (DBP), and heart rate (HR) were measured by home SMBP according to
international guidelines and by private “pharmacies SMBP”. Information on environment and conditions of BP
measurement was collected on form by each subject. Means and standard deviations of SBP, DBP, and HR were
calculated and compared from the measurements obtained.
Results : The mean age of study population was 21.1±2 years (Table 1). Only 9.7% of pharmacy measurements
were taken in quiet environment (Figure 1). In study population, SBP, DBP, and HR measured by home
SMBP were significantly (p=0.00) higher than those measured by “pharmacies SMBP” (Table 2). However, no
significant difference (p>0.5) was found between measurements obtained by home SMBP and those obtained by
“ pharmacies SMBP “ in quiet environment (Table 3). All of the equipment used in pharmacies were validated
electronic sphygmomanometers (Figure 2).
Conclusion: The environment significantly influenced measurements performed in pharmacies. Compared to
home SMBP, “private pharmacies SMBP” in our working context does not follow international guidelines and is
therefore influenced by environment and measurement conditions.
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