Abstract:
In a photoplethysmography (PPG) device, a nasal mount includes first and second optical supports (12, 14) secured to a nose (1) with the nasal septum (6) or an alar wing (6') between the optical supports. A green PPG component measuring green light transmission through the nasal septum includes a light source (20, 60) secured to the first optical support and a light detector (22, 62) secured to the second optical support. A red or near-infrared PPG component measuring red or near-infrared light transmission through the nasal septum includes a light source (30, 60) secured to one optical support and a light detector (32, 64) secured to the other optical support. An electronic data processor computes arterial blood oxygen saturation (SpO 2 ) from a ratio of intensities of the measured transmission of green light and the measured transmission of red or near-infrared light.
Abstract:
A device (10, 10', 10") includes a light source (12) and a light detector (14) spaced from, and in communication with, the light source (12). An electronic processor (18) is programmed to compute pulse oximetry data from output of the light detector (14). A clamping member (26) is included, on or in which the light source (12) and the light detector (14) are disposed. The clamping member (26) is configured for attachment to a human body part with the body part disposed between the light source (12) and the light detector (14) such that light from the light source (12) passes through the body part to reach the light detector (14). The clamping member (26) is configured to attach to the body part by transitioning from a first stable state to a second stable state via a compression force applied to the clamping member (26).
Abstract:
When measuring SpO2 in a patient, a nasal oximeter is inserted into the patient's nose and comprises a source pad (14) and a detector pad (18) that are positioned at a predetermined location on either side of the nasal septum. The source pad and detector pad are biased toward each other to provide a clamping force on the nasal septum sufficient to permit SpO2 measurement without causing tissue necrosis. Clamping force is supplied by means of a spring type device, an expandable material, or the like.
Abstract:
Methods and systems are described to automatically obtain and analyze a lung airway gas sample from the breath of a person for compositional analysis. These techniques may provide an improved method for example for accurately and reliably measuring nitric oxide for asthma assessment in young children and non-cognizant patients.
Abstract:
Provided herein are methods and systems for validating and interpreting respiratory signals in order to provide comprehensive non-invasive methods to monitor patients at risk for respiratory depression and apnea. In the present invention, data from multiple respiratory monitoring technologies (or from multiple channels of one monitoring technology) is fused so that the patient's true respiratory state may be elucidated.
Abstract:
The present invention relates to a system (1) and method for determining vital sign information (7) of a subject (100). The system comprises a marker (10, 10', 10'', 40) for application to the subject (100), wherein the marker (10, 10', 10'', 40) is configured to change an optical property due to a mechanical manipulation of the marker (10, 10', 10'', 40) caused by a physiological process of the subject (100), a detection unit (2) for detecting radiation from the marker (10, 10', 10'', 40), and an analysis unit (6) for determining the vital sign information (7) of the subject (100) from the detected radiation.
Abstract:
Provided herein are systems, methods and devices for performing one or more titrations for oral appliance therapy. For example, a method for evaluating an outcome of oral appliance therapy in a subject is discussed herein. The method can include positioning an adjustable mandibular displacement device in an oral cavity of a subject and implementing an automatic titration protocol. The protocol can include controlling a protrusion level of the adjustable mandibular displacement device during a test period, monitoring physiological information from the subject during the test period, and analyzing the physiological information to evaluate the outcome of oral appliance therapy.
Abstract:
Provided according to embodiments of the invention are methods for monitoring an individual including securing a photoplethysmography (PPG) sensor comprising at least one emitter and at least one detector onto skin overlying an ophthalmic artery region of the individual; and obtaining PPG signals generated by the PPG sensor. Sensors for photoplethysmographic monitoring at the ophthalmic artery region are also provided.
Abstract:
We describe a device, in embodiments a medical device such as a battlefield triage device,configured to be attached to and carried by a person, the device comprising an attachable sensor module, to attach to a person's face, the module having a respiratory sensing region comprising an air temperature sensor and a humidity sensor arranged such that, when the module is attached, airflow in and out of the person's lungs flows over said respiratory sensing region, the module further bearing an optical heart sensor arranged, when the module is attached, derive to an optical heart rate sensing signal from flesh of the person;a signal processing system,coupled to said sensor module,to process and combine signals from said temperature sensor and said humidity sensor to determine a respiration rate for said person and to process signals from said optical heart rate sensor to determine a heart rate of said person; a data output system, coupled to said signal processing system, to output data indicating one or both of said respiration rate and said heart rate. In some preferred embodiments the sensor is arranged to clip to the person's nose (or mouth).The respiratory sensing region is arranged such that airflow in and out of the person's lungs via the nostril flows over the respiratory sensing region and heart rate is sensed from the flesh of the nostril.