In: Other
An automated sphygmomanometer tightens around a
patient’s arm at a pressure of 250 mmHg, and gradually relieves
pressure at a rate of 12 mmHg/sec. A microphone in the cuff records
the onset of Korotkoff sounds after 9.6 seconds, and the sounds end
after 16.5 seconds.
(a) What are the systolic and diastolic blood pressure
values?
(b) Determine for each pressure value, whether it is high, low, or
normal. If you find some values are abnormal, suggest a possible
cause for the abnormalities. Cite any sources you used.
Given
an automated sphygmomanometer
patient's arm at P of 250 mmHg
Pressure relieved at a rate of 12mmHg/sec
korotkoff starts after 9.6 sec & sound ends at 16.5 sec.
a)to explain systolic & diastolic blood pressure values
while measuring B.P. of patient we tightens sphymomanometer around patients arm. at some Pressure then it relieved at some rate while doing this at some point korotkoff sound starts its called as systolic BP.
and after some time this sound changes this pressure is related to diastolic blood Pressure.
b) to calculate systolic & diastolic blood pressure values.
as korotkoff starts at 9.6 sec
amount of pressure relieved till 9.6 sec = rate of P relief* time
=12*9.6
=115.2 mmHg
so now P at patients arm=250-115.2
=134.8mmHg this is systolic B.P. as korotkoff starts at this P.
similarly
The P at which korotkoff ends is reletaed to diastolic B.P.
pressure relieved still 16.5 sec = 12*16.5=198 mmHg
so diastolic B.P.=250-198=52mmHg
normal | systolic: less than 120 mmHg diastolic: less than 80 mmHg |
at risk | systolic: less than 120-139 mmHg diastolic: less than 80-89mmHg |
high | systolic: less than 140 mmHg diastolic: less than 90mmHg |
low | systolic: less than 90 mmHg diastolic: less than 60mmHg |
from above chart you can see that patient BP is not under normal conditions
causes of Low BP
causes high BP