Re: amniotic fluid volumes
From: art fougner, md (evsono@pipeline.com)
Wed Jun 14 10:53:21 2006
Magann found both AFI and single vertical pocket depth to be weak
predictors of abnormal amniotic fluid volumes.
Obstet Gynecol. 2000 Nov;96(5 Pt 1):737-40.
Art
At Wed, 14 Jun 2006, Efrain Ramirez wrote:
>
>I might be wrong but I think that each vertical centimeter equals to
>approximately 40-50 cc of AF?
>
>Ef
>>
>At Tue, 13 Jun 2006, Dr. Ainsworth wrote:
>>
>>Looks like the best reference is Chamberlain, Manning, et.al; Ultrasound
>>evaluation of amniotic fluid volume, Am J Obstet Gynecol, 1984;
>>150:245-249. The classic article on Amniotic fluid volume in pregnancy
>>is by Queenan, also in Am J Obstet Gynecol, 114: 34, 1972. There is a
>>good graph in his book, Management of High-risk pregnancy. It shows
>>amniotic fluid volume peaking around 34wks, with a mean of ~900 and a
>>range of 400-1300 mL (+ or – 1 SD). How long it takes to reaccumulate
>>depends on pathologic process. He states that the fetus produces 43 mL
>>of urine per hour and the average exchange between mother and fetus is
>>3600 mL per hour, according to studies from 1959 by Hutchinson.
>>
>>Ronald E. Ainsworth, MD, FACOG
>>
>>At Mon, 12 Jun 2006, Dr. Ainsworth wrote:
>>>
>>>I'll resend this message tomorrow from my office, half of the message is
>>>missing!! Any idea why this and other emails I've sent are truncated? Is
>>>it happening at the OB-gyn website, or is it happening in my email
>>>program, Outlook??
>>>
>>>At Mon, 12 Jun 2006, ainsron wrote:
>>>>
>>>>Looks like the best reference is Chamberlain, Manning, et.al; Ultrasound
>>>>150:245-249.
>>>>The classic article on Amniotic fluid volume in pregnancy is by Queenan,
>>>>his
>>>>book, Management of High-risk pregnancy. It shows amniotic fluid volume
>>>>or -
>>>>1 SD). How long it takes to reaccumulate depends on pathologic process. He
>>>>states that the fetus produces 43 mL of urine per hour and the average
>>>>studies
>>>>from 1959 by Hutchinson.
>>>>
>>>>Ronald E. Ainsworth, MD, FACOG
>>>>
>>>>-----Original Message-----
>>>>Charlie
>>>>Chambers
>>>>Sent: Monday, June 12, 2006 12:57 PM
>>>>To: Multiple recipients of list OB-GYN-L
>>>>Subject: amniotic fluid volumes
>>>>
>>>>I'm trying to correlate AFI's to true amniotic fluid volume. Does anyone
>>>>normal
>>>>true volume at term? And lastly, if one performs a reduction amnio, over
>>>>what length of time does the fluid reaccumulate?
>>>>
>>>>Thanks for the help. I couldn't find it in my references.
>>>>
>>>>--
>>>>Charlie Chambers
>>>>
>>>>Hood River, OR
>>>>
>>>>cchamber@alumni.rice.edu
>>>>
>>>>"No matter where you go...
>>>>
>>>> there you are."
>>>>
>>>>Dr. Buckaroo Banzai
>>>>
>>>>************************************************************************
>>>>
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>>>>
>--
>“ The greatest obstacle to knowledge is not ignorance,
>it is the illusion of knowledge.” Daniel J. Boorstin - Historian
>
--
art fougner, md
"I drank what?" - Socrates
