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amniotic sac

An amniotic fluid-filled, thin membranous sac, which surrounds the embryo of amniote vertebrates; it provides a fluid cushion, prevents dehydration and acts as a waste receptacle during embryonic development.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.


Obstetrics A popular term for the amniotic sac, see there.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

Patient discussion about membranes

Q. HYALINE MEMBRANE DISEASE in pre-mature infants;what are the causes of it in pregnant women?

A. the cause of Hyaline Membrane disease is pre-mature birth. while the fetus develop, about in the 29th week a substance called surfactant is created in the lungs. this substance's function is to change the surface tension of the fluid in the lungs- therefore decreasing it's force. the surface tension tends to shrink the lungs and can cause the lungs to collapse. so a premature baby wouldn't be able to breath properly.

Q. For those that had an epimacular membrane removed, how long was it before your eye healed? How was your vision afterwards? Do you now require or benefit from glasses?

A. Epimacular membrane removal can be associated with a variety of ocular conditions and therefore the healing process varies tremendously depending on the underlying pathology. Furthermore, this condition may recur.

More discussions about membranes
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References in periodicals archive ?
Fact.MR has announced the addition of the "Hollow fiber membrane Market Forecast, Trend Analysis & Competition Tracking - Global Review 2018 to 2028"report to their offering.
[ClickPress, Tue Jul 30 2019] This report provides forecast and analysis of the global Chemical Separation Membranes Market .
The collation of membranes and amines for CO 2 removal systems as shown in Table-1 [16].
Membrane Systems: For Bioartificial Organs and Regenerative Medicine
The membranes were fabricated from the dope solution of polyvinylidene fluoride (PVDF) as the base polymer and N-methyl-2-pyrrolidone (NMP) as a solvent.
This work studied the effects of PEG as a polymeric additive and of low temperature and pressure DC glow discharge plasma on the morphological structures and surface properties of polysulfone/polyethylene glycol (PSF/PEG) membranes. Additionally, the permeation of [N.sub.2] and [O.sub.2] gases through PSF/PEG membranes before and after plasma treatment was measured and appraised.
Electrospun nanofiber membranes have significantly better transmembrane fluxes than currently used hydrophobic microfiltration membranes [8, 9].
Toray Industries is looking to the growth markets of Asia and the Middle East to swell its business of filtration membranes for water treatment, aiming to double annual sales in this sector to $808mn by 2020.
Quite relevantly, the talk about biofuels mandates mentioning industrial membranes which had been proven to be very crucial in the field of chemical process industry.
Among the scopes of the conference, mention can be made of membrane for fuel cell and energy applications, membrane for gas and vapor separation, membrane in petroleum industries, membrane for water and wastewater treatment, membrane for bio-refinery applications, bio-membranes, nano-membranes, membrane bioreactors, advanced materials for membrane fabrication, membrane contactors and multifunctional reactors, membranes characterization and modification, membranes for food and bio-product applications and membrane for pharmaceutical and medicine applications.

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