shake test

foam sta·bil·i·ty test

a test for fetal pulmonary maturity, determined by the ability of pulmonary surfactant in amniotic fluid to generate stable foam in the presence of ethanol after mechanical agitation.
Synonym(s): shake test

shake test

a qualitative test for fetal lung maturity. It is more rapid than determination of the lecithin/sphingomyelin ratio. Also called foam test.

shake test

Foam stability index, see there.

shake test

A quick test to estimate fetal lung maturity. A sample of amniotic fluid is diluted with normal saline, mixed with 95% ethyl alcohol, and shaken for 30 sec. The continued presence of small foamy bubbles in the solution after 15 min confirms the presence of pulmonary surfactant.
Synonym: foam stability test; rapid surfactant test
References in periodicals archive ?
A jar shake test with a closed glass jar, coating media, and defoamer that are shaken in a shaker or by hand is often used.
Shake test has 100% sensitivity, 100% specificity and 100% predictive value in detecting freeze damaged vaccine.
In the next set of data, a thermoplastic silicone treated with HM 4100 was evaluated in a one hour shake test using E.
Once it passes the shake test, give the RF connector a close look.
According to the patent literature, the emulsion has a foam volume below 5cc as measured in the solution shake test, and the retention of moisture is still measurable at least 30 minutes after the bathing treatment.
Follow the shake test with a careful visual examination.
In the ARAMARK challenge, garments will be subjected to either a readily releasable test of particulates or a bi-directional shake test, two tests defined by the Institute of Environmental Sciences and Technology RP-CC005 recommended practice.
ACD is the first manufacturer to conduct a shake test using a whole building for this type of system in the United States.
How do you find out you're out of gas - shake test, knock test, lift test, scale test, fuel gauge, Fuel Check?
How do you find out you're out of gas -- shake test, knock test, lift test, scale test, fuel gauge, Fuel Check?
Gold Recovery in Warm CGV Shake Tests by Mineral Zone