Amnicators are individually wrapped sterile swabs impregnated with a sensitive pH indicator, Nitrazine yellow. The principle of the Amnicator test is that normal vaginal pH at term ranges between 4.5-6.0 and amniotic fluid is usually 7.0-7.5. By means of a simple pH colour change of the Nitrazine yellow, which has a sharp end point, (6.4-6.8), exactly in the desired pH range, the midwife or obstetrician can accurately detect the presence of amniotic fluid.
Amnicators will reliably distinguish neutral or slightly alkaline amniotic fluid from the acidic cervical and vaginal mucus or urine.
The Amnicator test is far quicker and simpler to perform than resorting to the microscopic examination of escaping fluid, detecting the presence of protein or using orally administered dyes to stain urine to distinguish amniotic fluid from normal secretions and urine.
Distinguishes neutral or slightly alkaline amniotic fluid from acidic cervical and vaginal mucus or urine