please help. Person 1 c secure https://mycourses highpoint edubbcswebdav/pid-690
ID: 3480472 • Letter: P
Question
please help.
Person 1 c secure https://mycourses highpoint edubbcswebdav/pid-690474-dt-content-rid-87670291/courses 55506 Week%2013%20Data%20Sheet%20and%20Discussion%20Questions.. I. a) Does your systolic and'or diastolic arterial pressure change as your beart rate increases? Explain b) How does a change in systolic and diastolic pressures affect your pulse pressure? c) How would you expect the systolic, diastolic and pulse pressures to change in a normal healthy individual as the heart rate increases? 2. Give three sources of error in the indirect method of determining systemc aterial blood pressure. 3. Which Korotkoff sound is used to approximate systolic pressure and which sound is used to approximate diastolic pressure?Explanation / Answer
1.(a) heart rate affects cardiac output which inturn affects the blood pressure. moderate rise in heart rate does not affect cardiac outout but severe increase in heart rate increases cardiac output.
Systolic pressure is directly proportional to cardiac
output. Whenever the cardiac output increases, the
systolic pressure is increased and when cardiac output
is less, the systolic pressure is reduced.
Diastolic B.P. is not affected by moderate increase in heart rate.Moderate changes in heart rate do not affect arterial
blood pressure much. However, marked alteration in the
heart rate affects the blood pressure by altering cardiac
output.
(b) Pulse pressure is the difference between the systolic
pressure and diastolic pressure.
Normal pulse pressure: 40 mm Hg (120 – 80 = 40).
(c)If the heart rate increases, systolic pressure will also increase. After moderate increase in heart rate, systolic pressure increases by 20 to 30 mm Hg. diastolic pressure d=is not affected during moderate increase of heart rate as it depends upon peripheral resistance. if increase in heart rate is marked than diastolic pressure lowers due to decreased peripheral resistance due to vasodilatation.
pulse pressure also increases with heart rate.
2. three sources of error are -
3. Korotkoff sounds have five phases:
First phase – appearance of tapping sound
While decreasing the pressure from arm cuff, the
occlusion of the artery is relieved and when blood starts
flowing through the artery, first sound appears suddenly.
In a normal person, it appears, when the pressure is
reduced to 120 mm Hg. It is a clear tapping sound.
Appearance of tapping sound indicates systolic
pressure. When the pressure is reduced further by 10
mm Hg from the initial level, this sound slowly becomes
louder.
Second phase – appearance of murmuring sound
Following the clear taping sound, a murmuring sound
is heard when the pressure is reduced further by about
15 mm Hg.
Third phase – appearance of gong sound
After the murmuring sound, a very clear and louder
sound is heard. It is of gong type. It is heard while
reducing the pressure by another 15 mm Hg.
Fourth phase – appearance of muffled sound
Next to the gong type sound, a mild and muffled sound
is heard when the pressure is decreased further by
5 mm Hg.
Fifth phase – disappearance of muffled sound
Muffling sound disappears. Disappearance of this sound
indicates diastolic pressure.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.