摘要:
A method and apparatus for continuous measurement of blood pressure, based on pulse transit time, which does not require any external calibration. This technique, referred to herein as the ‘composite technique’, is carried out with a body-won sensor that measures blood pressure and other vital signs, and wirelessly transmits them to a remote monitor. A network of disposable sensors, typically placed on the patient's right arm and chest, connect to the body sensor and measure a time-dependent electrical waveform, optical waveform, and pressure waveform. The disposable sensors typically include an armband that features an inflatable bladder coupled to a pressure sensor, at least 3 electrical sensors (e.g. electrodes), and an optical sensor (e.g., a light source and photodiode) attached to a wrist-worn band.
摘要:
A method and apparatus for measuring a patient's blood pressure featuring the following steps: 1) measuring a time-dependent optical waveform with an optical sensor; 2) measuring a time-dependent electrical signal with an electrical sensor; 3) estimating the patient's arterial properties using the optical waveform; 4) determining a pulse transit time (PTT) from the time-dependent electrical signal and the time-dependent optical waveform; and 5) calculating a blood pressure value using a mathematical model that includes the PTT and the patient's arterial properties.
摘要:
A body-worn sensor that measures respiratory rate and other vital signs using an acoustic sensor (e.g., a small-scale sensor). The body-worn sensor features a chest-worn patch sensor that combines both the acoustic sensor and an ECG electrode into a single adhesive patch. To measure blood pressure, the device additionally performs a ‘composite’ PTT-based measurement that features both pressure-dependent and pressure-free measurements. The acoustic sensor measures respiration rate by recording sounds related to the patient's inspiration and expiration. The acoustic sensor is typically placed near the patient's trachea, but can also be placed on the middle right and left side of the chest, and the middle right and left side of the back.
摘要:
A body-worn sensor that measures respiratory rate and other vital signs using an acoustic sensor (e.g., a small-scale sensor). The body-worn sensor features a chest-worn patch sensor that combines both the acoustic sensor and an ECG electrode into a single adhesive patch. To measure blood pressure, the device additionally performs a ‘composite’ PTT-based measurement that features both pressure-dependent and pressure-free measurements. The acoustic sensor measures respiration rate by recording sounds related to the patient's inspiration and expiration. The acoustic sensor is typically placed near the patient's trachea, but can also be placed on the middle right and left side of the chest, and the middle right and left side of the back.
摘要:
A system is described that continuously measures a patient's blood pressure over a length of time. The system features a sensor assembly featuring a flexible cable configured to wrap around a portion of a patient's arm. The flexible cable features a back surface that includes at least two electrodes that are positioned to contact the patient's skin to generate electrical signals. It additionally features an optical sensor that includes at least one light source and at least one photodetector. These components form an optical sensor that is configured to generate an optical signal by detecting optical radiation emitted by the at least one light source and reflected from a blood vessel underneath the patient's skin.
摘要:
A system is described that continuously measures a patient's blood pressure over a length of time. The system features a sensor assembly featuring a flexible cable configured to wrap around a portion of a patient's arm. The flexible cable features a back surface that includes at least two electrodes that are positioned to contact the patient's skin to generate electrical signals. It additionally features an optical sensor that includes at least one light source and at least one photodetector. These components form an optical sensor that is configured to generate an optical signal by detecting optical radiation emitted by the at least one light source and reflected from a blood vessel underneath the patient's skin.
摘要:
A telematics method and system includes, and uses, a telematics device with a controller in communication with a diagnostic system configured to receive diagnostic information from a host vehicle; a position-locating system configured to determine location information of the host vehicle; a wireless transceiver configured to transmit and receive information through a wireless network to and from at least one Internet-accessible website; and, a communication interface including at least a short range wireless interface link. The telematics device may be embodied in an access device, which may include the position-locating system. The access device may be a smartphone, or similar device, that retrieves/transmits diagnostic data/information, and other data/information to/from the vehicle via the short range wireless link. The access device performs various telematics device functions; it uses a long range wireless interface to communicate diagnostic and related information to a central host computer, and to receive related information from same.
摘要:
The invention provides a method for monitoring a vehicle that features the steps of: 1) generating a data packet including vehicle data retrieved from the vehicle using a wireless appliance; 2) transmitting the data packet over an airlink with the wireless appliance so that the data packet passes through a network and to a host computer system; 3) processing the data packet with the host computer system to generate a set of data; and 4) displaying the set of data on a web page hosted on the internet.
摘要:
A telematics system is disclosed including a telematics device with a controller in communication with a diagnostic system configured to receive diagnostic information from a host vehicle; a position-locating system configured to determine location information of the host vehicle; a wireless transceiver configured to transmit and receive information through a wireless network to and from at least one Internet-accessible website; and, a communication interface including at least a short range wireless interface. The telematics device is further configured to communicate with at least one access device or sensor other than the diagnostic system and the position-locating system, and the communication interface is configured to universally interface with a plurality of access devices or sensors.
摘要:
In one embodiment, the invention provides an in-vehicle telematics system featuring: 1) a controller; 2) a diagnostics system configured to receive diagnostic information from a host vehicle; 3) a position-locating system configured to determine the host vehicle's location information; 4) a communication interface configured to send additional information to a peripheral system other than the diagnostic position-locating systems; and, 5) a wireless transmitter configured to transmit information through a wireless network to an Internet-accessible website.