Abstract: A first cannula assembly includes a cannula attachable to a patient to extend along and at least partially cover one side of the patient's face and leave completely exposed the other side of the patient's face. A second cannula assembly includes a reusable unit and a disposable and replaceable loop-shaped mouthpiece. The reusable unit contains a suction pump having a flow inlet and a flow outlet, a power source operatively connected to the suction pump, a carbon dioxide sensor in fluid communication with the flow outlet, and a microprocessor adapted to use at least the carbon dioxide sensor to calculate a carbon dioxide level. The mouthpiece has first and second ends, wherein the first end is directly attached to the reusable unit and the second end is positionable in a patient's mouth. The mouthpiece includes at least one respiratory-gas-sampling port in fluid communication with the flow inlet of the pump.

Abstract: The present invention provides apparatuses and methods to safely and economically deliver infusion fluid to a patient during a medical procedure. The infusion fluid may be a sedative, analgesic, amnestic or other pharmaceutical agent (drug) for alleviating a patient's pain and anxiety before, during and/or after a medical or surgical procedure. In general the apparatus comprises a microprocessor-based controller that receives inputs from a plurality of physiological monitors attached to a patient. The system controller processes the data from the physiological monitors and based upon a fluid infusion algorithm delivers infusion fluid to a patient. The physiological monitors monitor the patient throughout the course of the procedure and depending upon the health of the patient, drug delivery may be adjusted to optimize the procedure while ensuring the patient's health and pain level are maintained.

Abstract: An air-bubble-monitoring medication assembly includes a drug infusion subassembly having a tube for administering therein a liquid to a patient, a bubble-size determinator which is positioned to sense an air bubble entrained in the liquid in the tube and which determines the volume of the air bubble, and an analyzer. The analyzer logs the time the detector senses an air bubble and the volume of the air bubble, calculates a running sum of a total air volume of all air bubbles sensed over a time interval, compares the running sum with a preselected limit, and generates an output when the running sum exceeds the preselected limit. The medical system additionally includes a controller assembly which determines a delivery schedule for administering the liquid and which controls the drug infusion subassembly to administer the liquid in accordance with the determined delivery schedule. The method performs the analyzer functions.

Abstract: A gas supply and monitoring system is provided for use in many medical system which can include, but is not limited to, a sedation and analgesia system, anesthesia machines, dental gas systems, and veterinary systems which deliver gasses. The gas supply and monitoring system can include a gas source; a variable size orifice system connected to the gas source wherein the variable size orifice system has a gas output supply opposite of the gas source; and a sensor system connected to the gas output supply wherein the sensor system can be used to verify a patient receives the appropriate gas output supply.