Abstract: Methods of and devices for testing medical pumps via tracking induced single or multiple bubble trajectories within a fluid flow conduit (60) and methods of synchronized (600) corrections (604) of flow data estimates.

Abstract: Methods of and devices for testing medical pumps via tracking induced single or multiple bubble trajectories within a fluid flow conduit (60) and methods of synchronized (600) corrections (604) of flow data estimates.

Abstract: The present invention includes machine-enabled methods of, and devices and systems for, simulating thermo-dilution cardiac output measurements based on ambient room temperature measurements via the injectate temperature sensor.

Abstract: System, methods, and apparatuses produce simulated human physiological waveforms such as electrocardiograph (ECG) and blood pressure signals where the microcontroller and/or digital-to-analog converters may be switched to a lower power-consuming state by programmable instructions and switched on in response to a programmable sleep timer.

Abstract: System, methods, and apparatuses produce simulated human physiological waveforms such as electrocardiograph (ECG) and blood pressure signals where the microcontroller and/or digital-to-analog converters may be switched to a lower power-consuming state by programmable instructions and switched on in response to a programmable sleep timer.

Abstract: System, methods, and apparatuses produce simulated human physiological waveforms such as electrocardiograph (ECG) and blood pressure signals where the microcontroller and/or digital-to-analog converters may be switched to a lower power-consuming state by programmable instructions and switched on in response to a programmable sleep timer.

Abstract: A system for generating pressure pulses to calibrate a blood pressure (BP) monitor or other pressure sensing device is disclosed. The oscillometric blood pressure (BP) simulator of the preferred embodiment comprises an elastomeric bladder pneumatically coupled to the BP monitor, and an actuator adapted to reversibly compress the elastomeric bladder and induce one or more pressure pulses of predetermined magnitude, duration, and frequency in the BP monitor. The elastomeric bladder generally comprises an elastomeric tube such as medical grade hose or tubing that is compressed by a piston and bearing driven by a linear actuator, preferably a stepper motor and cam. The simulator further includes a plurality of serially coupled H-bridges for energizing the stepper motor windings with bipolar square pulses.

Abstract: A communication device for use in an ad hoc network is disclosed. The device is adapted to concurrently (a) communicate directly with other network nodes, (b) communicate indirectly with other network nodes via intermediate network nodes, and (c) serve as an intermediate network node with respect to other network nodes indirectly communicating with one another. When implementing unicast communications, the communication device employs a CSMA protocol with which to identify and reserve available communication slots defined in accordance with a TDMA protocol without the use of a beacon signal. When implementing multicast communications, the communication device employs a stochastic re-transmission scheme that ensures widespread dissemination of messages with minimal flooding.

Abstract: The present invention includes machine-enabled methods of, and devices and systems for, simulating thermo-dilution cardiac output measurements based on ambient room temperature measurements via the injectate temperature sensor.

Abstract: A living tissue light transmission simulator system (208, 308) includes receptors of light (215, 216, 315, 316) in portions of the infrared and red spectral bands and the receptors (215, 216, 315, 316), together with amplification (217, 218, 317, 318), infrared detection (239, 371), spectral separation circuitry (219, 319), and post-separation amplification (220, 221, 338, 339, 340, 320, 321), that may be used to drive at least one light source (222, 223, 322, 361). The living tissue light transmission simulator system (208, 308) includes at least one shutter (225, 235, 324, 363, 450) to mechanically modulate generated light from the at least one driven light source (222, 223, 322, 361) where the modulated light may be directed to a pulse oximeter.

Abstract: System, methods, and apparatuses produce simulated human physiological waveforms such as electrocardiograph (ECG) and blood pressure signals where the microcontroller and/or digital-to-analog converters may be switched to a lower power-consuming state by programmable instructions and switched on in response to a programmable sleep timer.

Abstract: A living tissue light transmission simulator system (208, 308) includes receptors of light (215, 216, 315, 316) in portions of the infrared and red spectral bands and the receptors (215, 216, 315, 316), together with amplification (217, 218, 317, 318), infrared detection (239, 371), spectral separation circuitry (219, 319), and post-separation amplification (220, 221, 338, 339, 340, 320, 321), that may be used to drive at least one light source (222, 223, 322, 361). The living tissue light transmission simulator system (208, 308) includes at least one shutter (225, 235, 324, 363, 450) to mechanically modulate generated light from the at least one driven light source (222, 223, 322, 361) where the modulated light may be directed to a pulse oximeter.

Abstract: A system for generating pressure pulses to calibrate a blood pressure (BP) monitor or other pressure sensing device is disclosed. The oscillometric blood pressure (BP) simulator of the preferred embodiment comprises an elastomeric bladder pneumatically coupled to the BP monitor, and an actuator adapted to reversibly compress the elastomeric bladder and induce one or more pressure pulses of predetermined magnitude, duration, and frequency in the BP monitor. The elastomeric bladder generally comprises an elastomeric tube such as medical grade hose or tubing that is compressed by a piston and bearing driven by a linear actuator, preferably a stepper motor and cam. The simulator further includes a plurality of serially coupled H-bridges for energizing the stepper motor windings with bipolar square pulses.

Abstract: An improved method and apparatus for non-invasive determination of blood pressure is disclosed. The oscillometric technique is employed, wherein a valve representative of the blood pressure is derived from a signal representative of the pressure oscillations in a cuff, where the value is derived for a plurality of cuff pressures, and where the cuff pressure corresponding to the maximum of the values derived from the pressure oscillations is taken to be the mean arterial pressure. The instant method uses as the value the complementary oscillation index which is defined to be the area bounded by a line connecting successive peaks in the signal and the signal beneath the line, divided by the time between peaks. Apparatus employing both digital and analog circuitry is employed.