Safety of Noninvasive Electrical Stimulation of Acupuncture Points (NESAP) in Infants

Experimental: EMPI Select TENS unit For analgesia, StimCare electrodes will be placed on the baby's legs at specific acupuncture points and electrical stimulation will be administered via a standard EMPI Select TENS unit. For the main study, a low continuous current will be provided with voltage of 3.5 mA. The frequency will be delivered using a stimulation of 10 Hz for 10±1 minutes prior to the heelstick, with continued stimulation during and for 5±1 min after the heel stick. Two sub studies will precede the main safety study, with 6 infants in each, using electrical stimulation intensities that are a fraction of the planned intensity. Infants in sub study 1 will receive electrical stimulation at 1 mA and 2 Hz. Infants in sub study 2 will receive electrical stimulation at 2 mA and 10 Hz.