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The intended use of the Philips NM3 monitor, Model 7900 is to provide: - cardiac output monitoring via the method of partial rebreathing in adult patients receiving mechanical ventilation during general anesthesia and in the intensive care unit (ICU). - spirometric, and carbon dioxide monitoring in neonatal, pediatric and adult patients during general anesthesia and in the intensive care unit (ICU) and the emergency department (ED). Separate combination CO2/flow sensors are provided for adult, pediatric and neonatal use. - continuous, non-invasive monitoring of functional arterial oxygen saturation and pulse rate in neonatal, pediatric and adult patients during both no motion conditions and for patients who are well or poorly perfused during general anesthesia and in the intensive care unit (ICU) and the emergency department (ED). The NM3 monitor Model 7900 and its sensors are intended to be used by trained operators when spirometric, capnographic, pulse oximetry, or cardiac output monitoring is indicated in the judgement of a physician. The use of the NM3 monitor Model 7900 for cardiac output monitoring is contraindicated in patients in which a small rise (3-5 mmHg) in their arterial partial pressure of CO2 level cannot be tolerated.

The Philips NM3 monitor is intended for non-invasive monitoring of the inspired and expired airflow and airway pressure of intensive care unit (ICU), anesthesia and emergency room (ER) patients, as well as capnography and pulse oximetry in all of these clinical settings. It is intended to serve the same purposes as the flow, carbon dioxide and pulse oximetry monitoring components of the predicate NICO with MARS monitor. In the NM3 monitor as in the NCO system, combination CO2 adapter/flow sensors (neonatal, pediatric, adult), combination adult CO2 adapter/flow sensors with a partial rebreathing valve and flow sensors (infant/neonatal, pediatricladult) are connected with a male pneumatic connector to the NICO monitor. Sidestream airway adapters and nasal cannulas are available which are connected with a sample cell connector to a receptacle on the LoFlo Module which can be interfaced to the NM3 monitor. All of these sensors are already legally marketed as accessories of 510(k) cleared Respironics-Novametrix predicate devices. The pulse oximetry sensors are connected to the NM3 monitor via a connector on the front panel of the monitor. All of the pulse oximetry sensors are already legally marketed as accessories of 510(k) cleared Masimo predicate devices. The principal function of the flow portion of combination sensors and flow sensors is to provide a differential pressure signal related to flow and airway pressure relative to atmospheric pressure. These sensors are often placed in the breathing circuit between the endotracheal tube and the ventilator circuit Y piece and may also be used in conjunction with a face mask or mouthpiece. The flow measurement portion of the NM3 monitor is contained in the Mercury module which consists of a microprocessor-based data acquisition system that measures flow, and pressure and interfaces with a Capnostat 5 CO2 sensor. The CO2 airway adapter portion of the combination sensors, allow the Respironics-Novametrix CO2 mainstream gas sensor, the Capnostat® 5, to attach to it and measure the concentration of CO2 in the airway using infrared technology. When CO2 measurements are combined with airway flow and volume measurements, other parameters such as CO2 production and dead space can be calculated. The Capnostat 5 sensor as a mainstream gas analyzer includes a sample cell positioned in the breathing circuit through which a patient's inspiratory and expiratory gases flow. The LoFlo module, a sidestream type of gas analyzer, samples gases at 50 ml/min from a sampling port in an adapter placed in a breathing circuit or from a nasal or oral cannula. The gas then passes through a sampling tube to the sample cell, where the gas components are measured. The combination adult CO2 adapter/flow sensors with a partial rebreathing valve with periodic activation of the rebreathing valve allow pulmonary capillary blood flow and cardiac output to be calculated using the differential Fick method.

The intended use of the Mercury module with Capnostat 5 is to provide: spirometric, and carbon dioxide monitoring in neonatal, pediatric and adult patients during general anesthesia and in the intensive care unit (ICU) and the emergency department (ED). Separate combination CO2/flow sensors are provided for adult, pediatric and neonatal use.

The Mercury module with Capnostat 5 is intended for non-invasive monitoring of the inspired and expired airflow and airway pressure of intention norminds for monthsive non emergency room (ER) patients, as well as capnography in all of these clinical settings. It is intended to serve the same purposes as the flow and carbon dioxide monitoring component of the NICO monitor. The Mercury module with Capnostat 5 is the flow and carbon dioxide monitoring component of the presently 510(k) cleared NICO with MARS monitor. It has been designed to include all of the functionality of the flow and carbon dioxide monitoring components of NCO with CO massurament workilling for a with Capnostat 5 is intended to provide all of the existing flow and CO2 measurement capabilities of the NICO Model 7300 of continuous monitoring of respiratory flow and pressure, and CO2 during anesthesia and intensive care and in the emergency department. The flow sensors connect to a patient airway circuit and provide physiological information to the Mercury module. The parameters directly measured and computed by the module (when connected to a Capnostal 5 sensor) include airway flow and pressure, volume, and CO2. The monitor calculates flow by measuring the pressure drop across a known resistance placed in the breathing circuit. CO2 is measured as the absorption of a known intensity of infrared light by CO2 molecules in the airway.

The intended use of the LoFlo C5 CO2 sensor is to provide carbon dioxide monitoring to a host monitoring system during anesthesia / recovery, in the intensive care unit (ICU), and in Emergency Medicine/Transport or Respiratory care.

The LoFlo C5 CO2 sensor is designed for continuous, non-invasive sidestream monitoring of carbon dioxide. Carbon dioxide is measured on-airway using an infrared absorption (IR) technique. The airway adapters and associated nasal cannulas are already legally marketed as accessories to the predicate device. The LoFlo C5 CO2 sensor is an integrated microprocessor based data acquisition system consisting of CO2 measurement, control circuitry and a high speed serial interface. The LoFlo C5 CO2 sensor uses SRAM for data storage and an EEPROM to store system parameters. The firmware resides in a PROM. The operations performed by the LoFlo C5 CO2 sensor include data acquisition, parameter calculation, zeroing, heater control and corrections to the CO2 signal for N2O, O2 and barometric pressure.