Primary care fetal assessment--low-cost fetal arousal testing.

Conventional vibro-acoustic stimulation tests require expensive vibro-acoustic stimulators and electronic monitoring equipment. Attempts to simplify the test have been made using an electric toothbrush and razor but even these simpler devices are not available in most primary care settings. We compared the sound pressure generated by a Corometrics 146 vibro-acoustic stimulator to that of an empty soft-drink can in an in vitro study. The can compared favourably to the conventional vibro-acoustic stimulator.