Blood Pressure Lab Report

BLOOD PRESSURE ESTIMATION

RESULTS:

(a)Measurement of blood pressure during resting phase Subject’s name: Wong Hoor Sheam

Measurement Systolic pressure (mmHg) Diastolic pressure (mmHg) Mean Arterial Pressure (mmHg)

Trial 1 100 65 76.67

Trial 2 93 62 72.33

Trial 3 95 60 71.67

Average 96 62 73.33

(b) Changes in blood pressure during orthostatic tolerance (when standing from supine position) Subject’s name: Ong Wei Qiao

Time (minutes) Systolic pressure (mmHg) Diastolic pressure (mmHg) Heart rate

Supine 140 74 70

0 144 88 72

1 135 89 79

2 136 91 86

3 134 87 75

4 128 81 76

5 126 90 71

(c) Changes in blood pressure after exercise Subject’s name: Abdullah

Time (minutes) Systolic pressure (mmHg) Diastolic pressure (mmHg) Heart rate

Baseline 132 70 99

0 142 73 129

2 135 75 122

4 140 80 126

6 143 96 123

8 112 81

Korotkoff sounds, also known as the K-Sounds are the arterial sounds heard through a stethoscope which is placed to the brachial artery distal to the cuff of a sphygmomanometer that change with varying cuff pressure. The Korotkoff sounds are used to determine systolic and diastolic blood pressure. These sounds are classified into five different phases. The phase 1 (K-1), phase II (K-2), phase III (K-3), phase IV (K-4) and phase V (K-5). In Phase I, the first sound can be heard as the cuff of the stethoscope deflated. The first sharp tapping sound is defined as the systolic pressure. Systolic pressure is the blood pressure at its highest immediately after the ventricle contracts. It usually occurs around 120mmHg.

In Phase II, the sound is a tap sound followed by a longer characteristical swishing sound. This is due to the increased blood flow in the artery.

The third sound obtained in Phase III is once again a crisp tap. The sound in this phase is similar to the sounds heard in K-1 but at this phase it is softer compared to