Capnography, a type of monitoring commonly used in hospital operating rooms and Intensive Care Units, measures concentrations of inhaled and exhaled carbon dioxide (CO2) going in and out of a patient's lungs. Also known as EtCO2 monitoring, Nonin - a world leader in medical monitoring - manufactures two of the most frequently used capnography equipment: LifeSense®; and RespSense®. These monitors, commonly used in sleep labs, during emergency transport (EMS) and in hospitals, clinics and home care settings, are hooked up to the patient through a straight t-connector and a CO2 tubing sample line like those featured here. These are medical disposables and come packaged with 25 per box. These CO2 connectors work on either intubated or non-intubated patients.