Abstract: A tool assembly for use with an electrosurgical device for cutting tissue includes a base portion, a return lead, an electrical insulator, a center pin, and an active lead. The center pin extends from the base portion and through a lumen of the electrical insulator. The active lead is securely fixed to the base portion and extends between the base portion and a distal portion of the center pin such that a portion of the active lead extends around the distal portion of the center pin and first and second segments of the active lead are spaced apart from the return lead. Upon activation, electrosurgical energy is transmitted from the active lead through tissue to the return lead to cut tissue in contact with the active lead.

Abstract: A method for measuring oxygen saturation includes determining a difference in voltage value for a light emitting diode based on a first voltage at the light emitting diode for a first current and a second voltage at the light emitting diode for a second current and determining a temperature for the light emitting diode based on the difference in voltage value. The method further includes determining an intensity of a received photonic signal corresponding to an output photonic signal output using the light emitting diode and determining an oxygen saturation level based on the intensity of the received photonic signal and the temperature for the light emitting diode. The method further includes outputting an indication of the oxygen saturation level.

Abstract: A method includes determining a difference in voltage value for a light emitting diode based on a first voltage at the light emitting diode for a first current and a second voltage at the light emitting diode for a second current and determining a temperature for the light emitting diode based on the difference in voltage value. The method further includes outputting an indication of the temperature.

Abstract: A method for measuring oxygen saturation includes determining a difference in voltage value for a light emitting diode based on a first voltage at the light emitting diode for a first current and a second voltage at the light emitting diode for a second current and determining a temperature for the light emitting diode based on the difference in voltage value. The method further includes determining an intensity of a received photonic signal corresponding to an output photonic signal output using the light emitting diode and determining an oxygen saturation level based on the intensity of the received photonic signal and the temperature for the light emitting diode. The method further includes outputting an indication of the oxygen saturation level.

Abstract: The present disclosure provides systems and methods for calibrating for errors dependent upon spectral characteristics of tissue for a medical device by estimating a spectral characteristic of tissue providing error due to scattering or absorption of emitted light based upon operating the sensor in reflectance mode to generate a first SpO2 reading and estimating error due to spectral characteristics of skin therefrom, operating the sensor in transmissive mode to generate a second SpO2 reading, and applying a correction to a pulse oximetry transmissive mode measurement to correct for the error dependent upon the estimated spectral characteristic of tissue.

Abstract: The present disclosure provides systems and methods for correcting for errors dependent upon spectral characteristics of tissue for a medical device by estimating a spectral characteristic of tissue providing error due to scattering or absorption of emitted light based upon a ratio of measurements for a patient.

Abstract: A device for measuring oxygen saturation includes circuitry configured to determine a series resistance for a light emitting diode based on a first diode voltage at the light emitting diode for a first current, a second diode voltage at the light emitting diode for a second current, and a third diode voltage at the light emitting diode for a third current. The circuitry is further configured to determine an intensity of a received photonic signal corresponding to an output photonic signal output using the light emitting diode. The circuitry is further configured to determine an oxygen saturation level based on the intensity of the received photonic signal and the series resistance.

Abstract: A device for measuring oxygen saturation includes circuitry configured to determine a measured difference of forward voltage based on a first forward voltage at a first light emitting diode and a second forward voltage a second light emitting diode and determine that the first and second light emitting diodes are valid based on a calibrated difference of forward voltage and the measured difference of forward voltage. In response to the determination that the first and second light emitting diodes are valid, the circuitry is configured to determine an oxygen saturation level.

Abstract: The present disclosure provides systems and methods for calibrating a medical device utilizing LED emission by characterizing the spectrum distribution of the LED emission and mapping such characterized spectrum distribution to calibration coefficients, e.g.

Abstract: A device for measuring oxygen saturation includes circuitry configured to determine a measured difference of forward voltage based on a first forward voltage at a first light emitting diode and a second forward voltage a second light emitting diode and determine that the first and second light emitting diodes are valid based on a calibrated difference of forward voltage and the measured difference of forward voltage. In response to the determination that the first and second light emitting diodes are valid, the circuitry is configured to determine an oxygen saturation level.

Abstract: A device for measuring oxygen saturation includes circuitry configured to determine a series resistance for a light emitting diode based on a first diode voltage at the light emitting diode for a first current, a second diode voltage at the light emitting diode for a second current, and a third diode voltage at the light emitting diode for a third current. The circuitry is further configured to determine an intensity of a received photonic signal corresponding to an output photonic signal output using the light emitting diode. The circuitry is further configured to determine an oxygen saturation level based on the intensity of the received photonic signal and the series resistance.

Abstract: A device for measuring oxygen saturation includes circuitry configured to measure a first diode voltage at a light emitting diode while applying a first current through the light emitting diode, measure a second diode voltage at the light emitting diode while applying a second current through the light emitting diode, and measure a third diode voltage at a light emitting diode while applying a third current through the light emitting diode. The circuitry is further configured to determine a series resistance based on the first diode voltage, the second diode voltage, and the third diode voltage and determine an intensity of a received photonic signal corresponding to an output photonic signal output using the light emitting diode. The circuitry is further configured to determine an oxygen saturation level based on the intensity of the received photonic signal and the series resistance.

Abstract: A device for measuring oxygen saturation includes circuitry configured to, while applying first current, measure a first forward voltage across the anode of the first light emitting diode and the cathode of the first light emitting diode and, while applying second current, measure a second forward voltage across the anode of the second light emitting diode and the cathode of the second light emitting diode. The circuitry is further configured to determine a measured difference of forward voltage based on a comparison of the first forward voltage and the second forward voltage and determine that the first and second light emitting diodes are valid based on a calibrated difference of forward voltage and the measured difference of forward voltage. In response to the determination that the first and second light emitting diodes are valid, the circuitry is configured to determine an oxygen saturation level.

Abstract: Systems, methods, apparatuses, and software for measuring and determining physiological parameters of a patient are presented. In one example, a physiological measurement system includes an optical system configured to emit one or more optical signals into tissue of a patient, and detect the one or more optical signals after propagation through the tissue. The physiological measurement system includes a capacitance system configured to apply one or more electric field signals to a single side of the tissue to determine a capacitance signal based at least on changes in the one or more electric field signals, and a processing system configured to process at least the one or more detected optical signals and the capacitance signal to determine a physiological parameter of the patient.

Abstract: Methods, apparatuses and systems are described for associating a patient with a medical sensor. Methods may include receiving a patient identifier that is physically coupled with the patient, receiving a dynamically generated sensor identifier associated with the medical sensor, and associating the patient identifier with the sensor identifier. Methods may further include re-receiving the patient identifier after an occurrence of a disassociation event between the patient and the medical sensor, receiving an updated sensor identifier associated with the medical sensor that is different from the sensor identifier received before the disassociation event, and associating the patient identifier with the updated sensor identifier. Systems may include a medical sensor configured to collect medical data from the patient and a display unit coupled with the medical sensor and configured to display a dynamically generated sensor identifier associated with the medical sensor.

Abstract: A connector for coupling a medical sensor to a medical monitor includes a first pin coupled and a second pin each electrically coupled to a first LED and to a second LED, respectively, of an emitter of the medical sensor. The connector includes a third pin electrically coupled to a cathode and a fourth pin electrically coupled to an anode of a detector of the medical sensor. The first pin and the second pin are arranged to have 180 degree symmetry relative to one another, and the third pin and the fourth pin are arranged to have 180 degree symmetry relative to one another.

Abstract: Systems, methods, apparatuses, and software for measuring and determining physiological parameters of a patient are presented. In one example, a physiological measurement system includes an optical system configured to emit one or more optical signals into tissue of a patient, and detect the one or more optical signals after propagation through the tissue. The physiological measurement system includes a capacitance system configured to apply one or more electric field signals to a single side of the tissue to determine a capacitance signal based at least on changes in the one or more electric field signals, and a processing system configured to process at least the one or more detected optical signals and the capacitance signal to determine a physiological parameter of the patient.

Abstract: Various methods and systems for obtaining calibration coefficients for pulse oximeter sensors are provided. A method includes passing current through a light emitting element in an oximeter sensor and measuring, utilizing a first voltage sensing lead, a first voltage present at an electrical input of the light emitting element. The method also includes measuring, utilizing a second voltage sensing lead, a second voltage present at an electrical output of the light emitting element and determining a forward voltage of the light emitting element based on the first and second voltages. Utilizing the determined forward voltage, a wavelength of light emitted from the light emitting element is calculated. Utilizing the calculated wavelength of the emitted light, at least one calibration coefficient for the oximeter sensor is determined.

Abstract: Systems, methods, apparatuses, and software for measuring and determining physiological parameters of a patient are presented. In one example, a physiological measurement system includes a physiological sensor system configured to detect a physiological signal representative of one or more physiological parameters associated with a patient. The measurement system also includes a capacitance system configured to apply one or more electric field signals to the patient and determine a capacitance signal. The measurement system also includes a processing system configured to reduce a noise level in the physiological signal based on at least the capacitance signal.

Abstract: Systems, methods, sensors, and software for providing enhanced measurement and correction of physiological data are provided herein. In one example, a capacitive sensor of a measurement system is positioned onto tissue of a patient. The capacitive sensor includes one or more conductive elements with associated gain properties that are positioned near optical sensor elements proximate to the tissue of the patient, the optical sensor elements positioned to measure a photoplethysmogram (PPG) for the tissue. The measurement system drives the capacitive sensor and measures capacitance signals associated with the capacitance sensor. The measurement system corrects for at least motion noise in the PPG using the capacitance signals.