The Correct Method for Measuring Blood Pressure

Blood pressure refers to the lateral pressure exerted by circulating blood on the walls of blood vessels per unit area. It serves as the driving force propelling blood through the vascular system. When commonly referred to, “blood pressure” denotes arterial pressure within the systemic circulation. So, what is the correct method for measuring blood pressure? The following section addresses this question.

Correct Method for Measuring Blood Pressure

Blood pressure is typically measured within one hour after waking in the morning or just before going to bed at night. Twenty minutes prior to measurement, it is advisable to empty the bladder, as urinary retention may influence blood pressure readings. Next, sit quietly at a table with your arm naturally extended and resting flat on the tabletop. Ensure that the cuff is positioned at the same level as the heart. For home self-monitoring, this method is suitable for most patients with hypertension and helps them gain a clear, individualized understanding of their blood pressure patterns—thereby contributing to better hypertension control. Additionally, individuals diagnosed with hypertension or those experiencing unstable blood pressure are advised to measure their blood pressure twice daily—once in the morning and once in the evening—with each session comprising two to three measurements; the average of these readings should be recorded. During measurement, avoid speaking, as conversing while taking blood pressure can affect accuracy and potentially cause abnormal fluctuations.

Supplementary Information: Causes of Unstable Blood Pressure (Fluctuating High and Low)

1. Disease-related Factors

Common underlying conditions include renal parenchymal diseases—for example, renal artery stenosis, primary aldosteronism, pheochromocytoma, and Cushing’s syndrome. Moreover, obesity, hyperlipidemia, hyperglycemia, hyperuricemia, and thyroid disorders may also contribute to blood pressure instability. Therefore, maintaining positive emotional well-being and an optimistic mindset supports stable blood pressure control.

2. Medication-related Factors

Long-term use of oral contraceptives, corticosteroids, or nonsteroidal anti-inflammatory drugs (NSAIDs) may affect blood pressure. In women taking oral contraceptives, both the incidence and degree of blood pressure elevation correlate with duration of use; contraceptive-induced hypertension is generally mild. However, selection and optimization of antihypertensive medications involve complex considerations; thus, such decisions should always be made under the guidance of a qualified physician.

3. Psychological and Environmental Factors

Marked emotional fluctuations—such as chronic stress, anxiety, or agitation—can stimulate the central nervous system, leading to increased cardiac output and heightened peripheral vascular resistance. Prolonged exposure to such states may compromise overall health. Similarly, excessive dietary sodium intake, insufficient intake of potassium and calcium, and inadequate consumption of high-quality protein may all contribute to blood pressure instability.

The above outlines the proper technique for measuring blood pressure. We hope this information proves helpful to you.