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 ?
Moreover, 31(74%) participants knew about shake test (performed to determine whether adsorbed vaccines have been affected by freezing) and 34(81%) vaccinators knew how to perform the test as they demonstrated it correctly.
About half of the students working on the project recently assembled at UH-Manoa to perform what's known as a shake test.
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.
The Shake Test to test damage to vaccines by freezing; Use of cool packs to prevent freezing; WHO-PDA Pharmaceutical Cold Chain Management on Wheels
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.
mishap during a shake test, the satellite was subjected to 20 g of acceleration instead of the planned 2 g, wrecking the solar-cell panels and the telescope's support ring and damaging the cryogenic cooler.
Follow the shake test with a careful visual examination.