Abstract: A system includes an alarm, a tilt detector, and a power supply communicatively connected to the tilt detector and communicatively connected to the alarm. The tilt detector, when no tilt is detected, prohibits communicative connection of the power supply to the alarm and, when tilt is detected, effects communicative connection of the power supply to the alarm. The system does not consume power of the power supply unless and until the system tilts causing the tilt switch to communicatively connect the power supply to the alarm. The alarm sounds on tilt until such time as the system is reset.

Abstract: A method and apparatus monitor myocardial ischemic events in various medical applications for providing continuous and contemporaneous information regarding, for example, modifying the amount of medication for a patient, determining response during (PTCA) balloon angioplasty, monitoring the onset of myocardial ischemic events during induction of anesthesia, determining painless myocardial ischemia in a resting patient, and monitoring the onset of myocardial ischemic during stress conditions in a patient. The method and apparatus also provide a calibration method for determining from a Resistive Index and using the resulting transformation for calculating, on a continuing basis, both systemic vascular resistance and cardiac output.

Abstract: An interactive injection system for use with a catheter of the type adapted for insertion into a patient's vascular system for thermodilution measurements and the like includes a chamber for storing liquid injectate, means for connecting the chamber to the catheter lumen, and a drive for operating on the chamber to flow liquid injectate from the chamber into the lumen for discharge as a bolus from the lumen into the vascular system of a patient. In preferred embodiments, a temperature sensing probe is connected between the injection chamber and the catheter for monitoring the temperature of injectate as it is introduced into the catheter.