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CAS Medical Systems

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Branford, CT, United States

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Patent
CAS Medical Systems | Date: 2016-10-03

According to the present invention, a method and apparatus for non-invasively determining the blood oxygen saturation level within a subjects tissue is provided. The method comprises the steps of: a) providing a spectrophotometric sensor operable to transmit light into the subjects tissue, and to sense the light; b) detecting light after passage through the subjects tissue using the sensor, and producing initial signal data from the light sensed; c) calibrating the sensor to that particular subject using the initial signal data, thereby accounting for the specific physical characteristics of the particular subjects tissue being sensed; and d) using the calibrated sensor to determine the blood oxygen parameter value within the subjects tissue.


Patent
CAS Medical Systems | Date: 2017-01-16

An oximetry sensor assembly connector, and a method for making the same, is provided that includes a flexible circuit and a stiffener panel. The flexible circuit has a plurality of layers including at least one electrical trace layer and at least one electromagnetic interference (EMI) shield layer. The stiffener panel has a first side surface and a second side surface, which second side surface is opposite the first side surface. The flexible circuit includes a first segment and a second segment, and one or more of the plurality of layers are disposed within the first segment and the second segment. The flexible circuit is folded such that the first segment is contiguous with the first side surface of the stiffener panel, and the second segment is contiguous with the second side surface of the stiffener panel.


Patent
CAS Medical Systems | Date: 2014-06-23

A near-infrared spectrophotometric system (e.g., a cerebral oximeter) includes a sensor portion and a monitor portion. The monitor portion includes a processor that runs an algorithm which utilizes the amount of detected light to determine the value of the oxygen concentration (e.g., the absolute level of oxygen concentration). The monitor portion also includes a visual display that displays the determined oxygen concentration values in various formats. The monitor portion may also include an audible device (e.g., a speaker), that provides audible indications of the determined oxygen concentration values. Various visual indicators may include, for example, color-coded graphs of the determined oxygenation values to alert the system user, for example, whether one hemisphere of the brain, or one or more regions of the brain, is in danger of adverse and potentially permanent damage. Also, data may be pre-processed by selecting the most clinically concerning sensor value (e.g., the sensor with the lowest value), and displaying only that sensor value and its identification on the display screen. Alternatively, an average value of multiple sensor measurements may be displayed. This reduces screen clutter and increases the speed of interpretation by the system user. Also, all sensor values may be averaged, and the average value displayed. The determined oxygenation values may also be provided in an audible format.


Patent
CAS Medical Systems | Date: 2016-05-25

A near-infrared spectroscopy (NIRS) sensor assembly for measuring a characteristic of a biological tissue is provided. The NIRS sensor assembly includes a light source (22), at least one light detector (24,26), and a layer (32) disposed within the sensor assembly. The light source (22) is operable to emit light at one or more predetermined wavelengths. The at least one light detector (24,26) has an active area for detecting light emitted by the light source (22) and passed through the biological tissue. The light detector (24,26) is operable to produce signals representative of the detected light. The layer (32) disposed within the sensor assembly has at least one deflection element (98).


A method and apparatus for non-invasively determining a blood oxygen saturation level within an organ of a subject using direct application of a near infrared spectrophotometric sensor is provided. The method includes the steps of: a) transmitting a light signal directly into the subjects organ using the sensor; b) sensing a first intensity of the light signal and a second intensity of the light signal, after the light signal travels a predetermined distance through the organ of the subject; c) determining an attenuation of the light signal along multiple different wavelengths using the sensed first intensity and sensed second intensity; d) determining a difference in attenuation of the light signal between wavelengths; and e) determining the blood oxygen saturation level within the subjects organ using the difference in attenuation between wavelengths.


A method and system for spectroscopic measurement of a characteristic of a biological tissue is provided. The method includes the steps of: 1. using at least one light source to emit light that penetrates the biological tissue; 2. using at least one light detector to detect light emitted by the at least one light source and passed through the biological tissue, and to convert the detected light into a detection signal, the detection signal including an unwanted noise component; and 3. using a processor (20) to process the detection signal and to determine an adjusted peak-to-peak amplitude value that is representative of an amplitude of the detection signal adjusted for the unwanted noise component.


Patent
CAS Medical Systems | Date: 2015-11-20

A near-infrared spectroscopy (NIRS) sensor assembly for measuring a characteristic of a biological tissue is provided. The NIRS sensor assembly includes a light source, at least one light detector, and a layer disposed within the sensor assembly. The light source is operable to emit light at one or more predetermined wavelengths. The at least one light detector has an active area for detecting light emitted by the light source and passed through the biological tissue. The light detector is operable to produce signals representative of the detected light. The layer disposed within the sensor assembly has at least one deflection element.


Patent
CAS Medical Systems | Date: 2014-07-18

An apparatus and method for non-invasively determining a blood oxygen parameter value of a subjects tissue is provided. An embodiment of the method includes the steps of: a) providing a spectrophotometric sensor that includes a processing portion and a transducer, b) detecting at least a portion of transmitted light after passage through the subjects tissue and producing initial signal data from the detected light; and c) using the processing portion to: (i) determine a value representative of an attenuation of at least one wavelength of light detected; (ii) determine whether the representative attenuation value is outside a predefined range of attenuation values; and (iii) determine the blood oxygen parameter value using a first interrogation or an alternate interrogation setting.


Patent
CAS Medical Systems | Date: 2014-03-19

A method and apparatus for non-invasively determining a blood oxygen saturation level within a subjects tissue is provided. A spectrophotometric sensor is operable to transmit light into the subjects tissue, and to sense the light. The method comprises the steps of: sensing the subjects tissue using the sensor, and producing signal data from sensing the subjects tissue; processing the signal data, including accounting for specific physical characteristics of the particular subjects tissue being sensed; calibrating the sensor with signal data generated from sensing the particular subjects tissue; and determining the blood oxygen saturation level within the subjects tissue using the calibrated sensor. The sensor that has been calibrated in a subject dependent manner is able to provide a more accurate assessment of the subjects blood oxygen saturation level within the tissue.


Patent
CAS Medical Systems | Date: 2014-11-20

According to the present invention, a method and apparatus for non-invasively determining the blood oxygen saturation level within a subjects tissue is provided. The method comprises the steps of: a) providing a spectrophotometric sensor operable to transmit light into the subjects tissue, and to sense the light; b) detecting light after passage through the subjects tissue using the sensor, and producing initial signal data from the light sensed; c) calibrating the sensor to that particular subject using the initial signal data, thereby accounting for the specific physical characteristics of the particular subjects tissue being sensed; and d) using the calibrated sensor to determine the blood oxygen parameter value within the subjects tissue.

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