Patent application number | Description | Published |
20090076398 | Continuous Non-Invasive Blood Pressure Measurement Apparatus and Methods Providing Automatic Recalibration - A blood pressure measurement system is configured to perform a calibration automatically when a calibration condition is satisfied. The calibration condition is based upon one or more parameters of pulse waves of a subject. The parameters may include pulse wave area; a time difference between systolic peak and reflected wave peak or dichrotic notch in the pulse wave and a shape of at least a portion of the pulse wave. | 03-19-2009 |
20100084557 | LIGHT INTENSITY CONTROL FOR NEAR INFRARED SPECTROSCOPY - A system for near infrared spectroscopy includes a controller that automates selection of light intensities for one or more light sources. The system may stepwise increase or decrease a current driving a light source until a signal received at a light detector is within a desired range. The system may maintain closed loop control over the intensity of a light source after the intensity has been set. The closed loop control may be based on a signal from a second light detector that senses light from the light source. Current/intensity settings may be established for each of multiple light detectors. In response to selection of a light detector, the corresponding current may be delivered to drive the light source. | 04-08-2010 |
20100127627 | LIGHT-EMITTING MEDICAL DEVICES HAVING PROTECTIONS AGAINST UNINTENDED LIGHT EXPOSURE - Apparatus and methods are provided for guarding against unintended exposure to light from a light-emitting device used to direct light to a subject for detection by a light detector. A sensor signal indicative of light detected by the light detector is sampled. An inhibition signal for inhibiting emission of light from the light-emitting device is generated, based at least in part on whether emitted light is expected from the light-emitting device and the comparison of the sampled sensor signal value to a threshold value. The light-emitting device may be monitored for continuous wave operation. A mechanical interlock may be provided having a guard moveable between closed and open positions respectively to cover and expose a port of the light-emitting device. | 05-27-2010 |
20100130880 | APPARATUS AND METHODS FOR MONITORING BLOOD FLOW IN THE PROSTRATE GLAND - A system for detecting blood flow in the prostate comprises a blood flow sensor disposed on a catheter that can be inserted into a subject's urethra so that the blood flow sensor is located to detect blood flow in the subject's prostate gland. The sensor may be a sensor of a near infrared spectroscopy (NIRS) system configured to detect in the prostate one or more biocompounds indicative of blood flow. An output of the sensor may provide an input to a controller for a heater disposed to heat tissues of the prostate. Some embodiments comprise one or more additional sensors for detecting blood flow and/or temperature of a portion of the subject's rectal wall adjacent to the prostate gland. In such embodiments, outputs from the additional sensors may provide additional inputs to the controller. | 05-27-2010 |
20100145169 | METHODS AND SYSTEMS FOR DETECTING A CONDITION OF COMPARTMENT SYNDROME - Methods and systems for detecting and alerting one to a condition of Compartment Syndrome provide for determining concentration data of biochemical compounds in tissues, preferably at a shallow depth beneath the skin; analysing the concentration data to detect a condition of Compartment Syndrome; and triggering an alarm if a condition of Compartment Syndrome is detected. The concentration of biochemical compounds may be measured using Near Infrared Spectroscopy. The biochemical compounds may comprise at least one compound from the group consisting of Hemoglobin, Oxygenated Hemoglobin, Cytochromes and Myoglobin. | 06-10-2010 |
20140012147 | CONTINUOUS NON-INVASIVE BLOOD PRESSURE MEASUREMENT APPARATUS AND METHODS PROVIDING AUTOMATIC RECALIBRATION - A blood pressure measurement system is configured to perform a calibration automatically when a calibration condition is satisfied. The calibration condition is based upon one or more parameters of pulse waves of a subject. The parameters may include pulse wave area; a time difference between systolic peak and reflected wave peak or dichrotic notch in the pulse wave and a shape of at least a portion of the pulse wave. | 01-09-2014 |