Calibration

To ensure that the blood pressure readings that were taken from our subjects were accurate, our team decided to calibrate 2 sphygmomanometers of different brands. We chose to use different brands for our sphygmomanometers to rule out any biasness specific to the manufacturer.

The 2 sphygmomanometers we used in our project were:
1. Osim uCheck 300

2. Omran 1A2

For calibration, three of our groupmates, Sabree, Hui Ting and Yi Xuan, ran one round around NYP's school track and had their blood pressures taken before and after the exercise. All three of them were healthy and had no underlying medical conditions that might affect the readings.

Taking the blood pressure using our first sphygmomanometer, the Osim uCheck 300...

Step 1: Taking the blood pressure before the run

Step 2: Ready, get set... RUN!!!!

It's a pity we couldn't get a wind in hair shot :(










Step 3: Taking the blood pressure again after the run

Hui Ting and Yi Xuan also had their blood pressure readings taken before and after running. We waited for half an hour to cool down before taking the blood pressures again using our second sphygmomanometer. The results were as follows...

The average deviation in readings for the diastolic and systolic pressures were ±2 mmHg and ±2 mmHg respectively. As we planned to use the Osim uCheck 300 to take the blood pressure of out subjects (it was more portable), we had to add 2 mmHg and 2 mmHg to the diastolic and systolic pressures respectively of the readings from our subjects.