Abstract: Methods and systems are provided for a pulse oximetry probe configured to measure blood originating from the internal carotid artery. One example system includes a light emitter and a light detector coupled to a substrate and an attachment mechanism configured to couple the nasal pulse oximetry probe to a nose of a patient, the light emitter and light detector positioned on opposite sides of the nose at the root of the nasal bridge. One example method determines peripheral arterial oxygen saturation (SpO2) respiratory variability as well as other physiological parameters from measurements taken from the internal carotid artery.

Abstract: A SpO2 measurement system includes at least one light transmitter configured to transmit a first wavelength light and a second wavelength light into tissue of a patient, wherein the second wavelength is shorter than the first wavelength, and a detection device that detects the first wavelength light and the second wavelength light emitted from the tissue of the patient. The SpO2 measurement system operates the at least one light transmitter in a high power mode during a first time period to determine a SpO2 value and a high power DC ratio based on the first wavelength light and the second wavelength light detected during operation in the high power mode. The SpO2 measurement operates the at least one light transmitter in a low power mode during a second time period to determine a low power DC ratio based on the first wavelength light and the second wavelength light detected during operation in the low power mode, and to determine a blood oxygenation status for the patient based on the low power DC ratio.

Abstract: A SpO2 measurement system includes at least one light transmitter configured to transmit a first wavelength light and a second wavelength light into tissue of a patient, wherein the second wavelength is shorter than the first wavelength, and a detection device that detects the first wavelength light and the second wavelength light emitted from the tissue of the patient. The SpO2 measurement system operates the at least one light transmitter in a high power mode during a first time period to determine a SpO2 value and a high power DC ratio based on the first wavelength light and the second wavelength light detected during operation in the high power mode. The SpO2 measurement operates the at least one light transmitter in a low power mode during a second time period to determine a low power DC ratio based on the first wavelength light and the second wavelength light detected during operation in the low power mode, and to determine a blood oxygenation status for the patient based on the low power DC ratio.

Abstract: The system and method of the present application includes a physiological sensor and a motion sensor connected to a patient. The physiological sensor detects patient connection to the sensor and collects a physiological signal while connected. When the physiological sensor is disconnected, the motion sensor data is analyzed. Patterns of sensor connection and patient movement typical for nurse initiated removal compared to accidental or patient initiated removals are created. The alarm protocol may be modified if the disconnection is due to patient movement. The detected movement patterns may include movement measurements that are close to the sensor that detects how the actual disconnection happens, or general movement information for the patient such as whether the patient has been still or has moved before the sensor gets disconnected. By using this information to classify the reason of the sensor removal, a more relevant alarm may be generated.

Abstract: A patient monitoring system includes one or more wireless sensing devices configured to record physiological data from a patient and one or more processors. An activity analysis module is executable on one or more of the processors to select an activity class from a predefined set of activity classes based on an activity input. A power management module is executable on one or more of the processors to reduce power consumption of one or more of the wireless sensing devices by identifying that one or more of the wireless sensing devices is unreliable based on the activity class, and operating the one or more unreliable wireless sensing devices in a low power mode.

Abstract: Methods and systems are provided for a nasal pulse oximetry probe configured to measure blood originating from the internal carotid artery. One example system includes a light emitter and a light detector coupled to a substrate and an attachment mechanism configured to couple the nasal pulse oximetry probe to a nose of a patient, the light emitter and light detector positioned on opposite sides of the nose at the root of the nasal bridge.

Abstract: The system and method of the present application includes a physiological sensor and a motion sensor connected to a patient. The physiological sensor detects patient connection to the sensor and collects a physiological signal while connected. When the physiological sensor is disconnected, the motion sensor data is analyzed. Patterns of sensor connection and patient movement typical for nurse initiated removal compared to accidental or patient initiated removals are created. The alarm protocol may be modified if the disconnection is due to patient movement. The detected movement patterns may include movement measurements that are close to the sensor that detects how the actual disconnection happens, or general movement information for the patient such as whether the patient has been still or has moved before the sensor gets disconnected. By using this information to classify the reason of the sensor removal, a more relevant alarm may be generated.

Abstract: A patient monitoring system includes one or more wireless sensing devices configured to record physiological data from a patient and one or more processors. An activity analysis module is executable on one or more of the processors to select an activity class from a predefined set of activity classes based on an activity input. A power management module is executable on one or more of the processors to reduce power consumption of one or more of the wireless sensing devices by identifying that one or more of the wireless sensing devices is unreliable based on the activity class, and operating the one or more unreliable wireless sensing devices in a low power mode.

Abstract: The invention relates to a method for monitoring a condition of a patient under anesthesia or sedation, whereupon one, two, three or more signals are acquired, and the signal(s) represent(s) cardiovascular and/or combined electrical biopotential on skull activity of the patient. From said signal or signals are derived or calculated at least two parameter values related to a quantity like waveform amplitude, waveform periodicity, waveform morphology, waveform variability, energy, power, signal complexity and frequency content. A predetermined mathematical index for probability of patient comfort is used, in which function said parameters are variables, and successively changing probability index values of said mathematical index is calculated.

Abstract: The invention concerns a method and an apparatus for monitoring a condition of a patient under anesthesia or sedation. For this purpose there is a sensor for acquiring a signal that represents peripheral cardiovascular flow in the patient. Successive heart beat pulses are detected and predetermined pulse wave parameters are measured repeatedly in said signal, and predefined pulse wave parameters within said heart beat pulses are measured, too. At first, said predetermined pulse wave parameters in a number of successive heart beat pulses are compared in respect to possible occurrence of a substantial alteration. At second, if the alteration is noticed, a statistical reference value is calculated by deriving values from at least said predefined pulse wave parameters, and the change(s) between at least one predefined pulse wave parameter and said reference value is quantified. The results and/or intermediate results are finally displayed and/or recorded.

Abstract: The invention relates to a method for monitoring a condition of a patient under anesthesia or sedation, whereupon one, two, three or more signals are acquired, and the signal(s) represent(s) cardiovascular and/or combined electrical biopotential on skull activity of the patient. From said signal or signals are derived or calculated at least two parameter values related to a quantity like waveform amplitude, waveform periodicity, waveform morphology, waveform variability, energy, power, signal complexity and frequency content. A predetermined mathematical index for probability of patient comfort is used, in which function said parameters are variables, and successively changing probability index values of said mathematical index is calculated.

Abstract: The invention relates to a method for monitoring a condition of a patient under anesthesia or sedation, whereupon one, two, three or more signals are acquired, and the signal(s) represent(s) cardiovascular and/or combined electrical biopotential on skull activity of the patient. From said signal or signals are derived or calculated at least two parameter values related to a quantity like waveform amplitude, waveform periodicity, waveform morphology, waveform variability, energy, power, signal complexity and frequency content. A predetermined mathematical index for probability of patient comfort is used, in which function said parameters are variables, and successively changing probability index values of said mathematical index is calculated.

Abstract: A photoplethysmographic system and method is provided to identify compatible sensors to monitors and/or for determining sensor attributes. The improved system includes a signal generation means for providing an interrogation signal, an identifying means coupled between a first and second sensor terminal operable to produce multiple outputs upon application of the interrogation signal in two modes of operation, and a processor to interpret the outputs. When the interrogation signal is applied to a sensor terminal in a first mode, a first output is obtained. Upon applying the same interrogation signal to the sensor terminal in a second mode, a second output is obtained. The first and second outputs may then be utilized by the processor comprising, for example, a photoplethysmographic monitor to yield enhanced sensor information. The disclosed method may be carried out utilizing the inventive photoplethysmographic system.

Abstract: A photoplethysmographic system and method is provided to identify compatible sensors to monitors and/or for determining sensor attributes. The improved system includes a signal generation means for providing an interrogation signal, an identifying means coupled between a first and second sensor terminal operable to produce multiple outputs upon application of the interrogation signal in two modes of operation, and a processor to interpret the outputs. When the interrogation signal is applied to a sensor terminal in a first mode, a first output is obtained. Upon applying the same interrogation signal to the sensor terminal in a second mode, a second output is obtained. The first and second outputs may then be utilized by the processor comprising, for example, a photoplethysmographic monitor to yield enhanced sensor information. The disclosed method may be carried out utilizing the inventive photoplethysmographic system.