Correlation Research Study: IQ2, NcIQ and IQ101

The new NcIQ thoracic impedance monitor is based on the predicate device, the IQ101. The new model uses the same 3-dimensional signal averaging as the original device, but also include second radio frequency signal to permit the device to work \"wirelessly\", i.e., without electrode lead attachments to the patient. This study seeks to 1) validate the use of the new device and confirm the correlation of the IQ101 and NcIQ. 2) Evaluate the ease of the new device. The new IQ2 thoracic impedance monitor is based on the predicate device, the IQ101. The new model uses the same 3-dimensional signal averaging as the original device, but with smaller housing and updated operating software. This study seeks to 1) Validate the use of the new device and confirm the correlation of the IQ101 and IQ2. 2) Compare the ease of the devices.