Abstract: Apparatus, systems, and methods for powering an electric device coupled to a patient to reduce transients on patient monitoring devices are provided herein. In some embodiments, an apparatus for reducing transient electrical events on a patient monitoring device may include a device that can be powered on or off to cause current flow through a load of the device and which has a line out that is capacitively coupled to a patient during use; and a control circuit to control a periodic coupling of first and second voltage sources to the load out of phase at a predetermined carrier frequency to provide continuous current flow through the load in alternating directions, and to control the periodic coupling of first and second voltage sources to the load in phase at a predetermined carrier frequency to provide no current flow through the load.

Abstract: Apparatus, systems, and methods for powering an electric device coupled to a patient to reduce transients on patient monitoring devices are provided herein. In some embodiments, an apparatus for reducing transient electrical events on a patient monitoring device may include a device that can be powered on or off to cause current flow through a load of the device and which has a line out that is capacitively coupled to a patient during use; and a control circuit to control a periodic coupling of first and second voltage sources to the load out of phase at a predetermined carrier frequency to provide continuous current flow through the load in alternating directions, and to control the periodic coupling of first and second voltage sources to the load in phase at a predetermined carrier frequency to provide no current flow through the load.

Abstract: Methods and apparatus for warming a patient are disclosed herein. In some embodiments, a patient warming device may include a heater layer comprising a plurality of heater cells disposed on a flexible substrate; and a thermal conduction layer disposed on a patient side of the heater layer to transfer heat generated by the heater layer to a patient. The heater cells may comprise an electrical circuit to generate heat by Joule heating. The patient warming device is flexible to facilitate conforming the patient warming device to a patient during use.