Re: amniotic fluid volumes
From: Efrain Ramirez (eramirezt@coqui.net)
Wed Jun 14 06:29:15 2006
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
>>>
>>>************************************************************************
>>>
>>>************************************************************************
>>>************************************************************************
>>>************************************************************************
>>>
--
“ The greatest obstacle to knowledge is not ignorance,
it is the illusion of knowledge.” Daniel J. Boorstin - Historian
