At present, most guidelines at home and abroad suggest that the interval between two repeated measurements of blood pressure with an automatic Sphygmomanometer should be 1-2 minutes, whether in the consulting room or at home. However, the study of the Beth Israel Deaconess Medical Center in the United States found that the blood pressure value obtained by repeated blood pressure measurement with an interval of 30 seconds was as accurate and reliable as that obtained with an interval of 60 seconds.

A total of 102 hypertensive patients with an average age of 59.2 years were included in the study and underwent a 3-day blood pressure assessment. All patients underwent 24-hour ambulatory blood pressure monitoring and were divided into two groups: half of the patients repeated blood pressure measurements every 30 seconds, and the other half repeated blood pressure measurements every 60 seconds. The results showed that among the patients whose blood pressure was measured repeatedly every 60 seconds and 30 seconds, the average blood pressure of 24-hour dynamic monitoring was 132.5/77.7 Millimetre of mercury and 128.6/76.5 Millimetre of mercury respectively; When blood pressure was measured every 60 seconds, the average blood pressure of the second and third time decreased by 0.5/1.7 Millimetre of mercury and 1.0/2.3 Millimetre of mercury respectively; When blood pressure was measured at an interval of 30 seconds, the average blood pressure of the second and third time decreased by 0.8/2 Millimetre of mercury and 0.7/2.7 Millimetre of mercury respectively.

The researchers stated that blood pressure measurement methods at different time intervals did not have a significant impact on the results, and the difference between the average blood pressure measured during waking hours by 24-hour ambulatory blood pressure monitoring was almost zero. Therefore, it is recommended to repeatedly measure blood pressure every 30 seconds. ▲ (Tian Yuting)