saparil
Forum Newbie
Topics: 7
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help me please with this
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| microsporus
Forum Newbie
Topics: 0
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I think is d
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| silver
Forum Guru
Topics: 21
Posts: 774
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A ??
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| mikky
Forum Elite
Topics: 15
Posts: 338
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i go with a
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| doc179
Forum Guru
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D
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| step122
Forum Newbie
Topics: 1
Posts: 17
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the true answer is d
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| mikky
Forum Elite
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Posts: 338
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plz explain
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| doc179
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It can not be choice B since increased venous compliance means increased pooling of blood in the veins which does not happen in a patient who is heamorrhaging. The systemic veins contract to contribute blood to the decreasing circulatory volume which means decreased venous compliance.
It can not C.. since ADH should be secreted to retain fluid and hence contribute to the circulating volume. Hence decreased diuresis and fluid retention is what happens as an adaptive response.
It can not be E, since Atrial natriuretic peptide causes loss of Na with water. Again we need to retain as much fluid as we can to increase the circulatory volume in the patient hence Atrial natriuretic peptide decreases as an adaptive response in this patient.
It can not be A since increased end systolic volume is not a compensatory mechanism in this patient. Its the sign of CHF and volume overload.
So the answer is D. Heamorrhage -----> decreased hydrostatic pressure -----> relative incraese in oncotic pressure ----> fluid moves from interstitial to intra vascular compartment ----> increase in circulatory volume which has a positive effect in this patient.
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| silver
Forum Guru
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 thanks doc179!
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| SmokyWaters
Forum Elite
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its D./..\
there are three types of compensatory mechs operating
IMMEDIATE: include baroreceptor, carotid body, cushing reflex
INTERMEDIATE
(in minutes) shift of fluid from interstitiium to vascular compartment
LATE: renin aldo angiotensin system
ADH secretion
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