sturge_weber
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tell the ans
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| Doc2378
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Is it Cocaine intoxication?
Eosinopillic neurons and chromatolysis are seen in acute inchemic injury.
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| roopashri
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its cocaine intoxication
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| sturge_weber
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na try again
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| drk1980
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Sturge, how did u get that page to be like that?!
Ima guessing cardiorespiratory arrest.....i thin u see the same pic with drowning.....situations of hypoxia.
correct me plz
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| sturge_weber
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yes u re right
its cardio respiratory arrest
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| drk1980
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A 73-year-old man is undergoing a radical prostatectomy for prostatic adenocarcinoma. During this procedure the anesthesiologist reports a drop in blood pressure with hypotension that persists for 30 minutes despite intervention with pressor agents. Which of the following pathologic lesions is most likely to occur in his brain as a consequence of this prolonged hypotensive episode? A Hydranencephaly
B Linear parasaggital infarction
C Lacunar infarcts of basal ganglia
D Parietal lobe hemorrhagic infarct
E Anterior pituitary necrosis
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| Doc2378
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Is it E?
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| reet
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E...
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| skyhigh
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maybe e
Edited by skyhigh on 01/18/06 - 02:26 PM
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| drk1980
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any to concur or differ?
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| sturge_weber
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well thats what i know , that the areas which re first to be affected when a hypotensive episode to the brain re the purkinje cells of the cerebellum the neocortex, and the hippocampus, in bothe these the pyramidal neurons...
then the choice that matches is none
so i too make ant pituary infarction
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| drk1980
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sturge, thr is a reason why i put this Q in this thread....the answer is there in the expln to ur Q u posted above!!
plz try again...
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| drk1980
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okay...gonna be logging off...so anyway answer is B the "watershed zone"
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| sturge_weber
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ok anyone tell me about the watershed zones in the brain please????
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| sturge_weber
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i think i am very weak in cns, thats what score report says
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| skyhigh
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is watershed area near the middle cerebral artery and the anterior cerebral artery?
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| sturge_weber
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check this out
copied from the web
Hypoperfusion can occur as a result of (1) atherosclerotic disease that limits distal flow or (2) systemic hypotension, such as seen in patients who experience acute cardiacarrhythmia or cardiac arrest. A reduction in cerebral perfusion pressure activates the autoregulatory system. As the small arterioles constrict in an attempt to maintain pressure, ischemia can develop in the distal branches of the vascular tree. Areas of the brain that lies between two major vascular supplies (eg, the middle and anterior cerebral arteries) is known as a watershed area. These areas are especially prone to ischemia during episodes of systemic hypotension.
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| reet
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good discussion u all.........
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| skyhigh
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was the hypotension in the question due to septic shock or hypovolemic shock, or none of the above.?
i think drk1980 might know since it's his question.
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| drk1980
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skyhigh wrote:
was the hypotension in the question due to septic shock or hypovolemic shock, or none of the above.?
i think drk1980 might know since it's his question.
For the second Q, the patient sustained hypotension as a complication of surgery and/or anesthesia. The Q is asking you, 'due to this sustained hypotension(30minutes) wht is the most likely pathological finding in his brain'.........teh answer is B...which is a watershed zone...tht is an area in the cortex that lies between the MCA and ACA arterial circulation......the details of the process are pasted above by STURGE.
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| krsna
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that was a very informative discussion guys...thnx for that
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| doc179
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according to kaplan watershed area is between ACA and MCA ,and MCA and PCA
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| msyamp
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hey guys watershed area is the area which is the the juction of two drainig arteries.
we have watershed between every two.
http://www-medlib.med.utah.edu/WebPath/CNSHTML/CN...
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| msyamp
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hey guys watershed area is the area which is the the juction of two drainig arteries.
we have watershed between every two.
http://www-medlib.med.utah.edu/WebPath/CNSHTML/CN...
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