摘要:
A system and method for monitoring in a patient includes producing sensor signals representative of a physiologic parameter associated with respiration. A periodic breathing cycle is detected based on the sensor signals. An output is produced as a function of the cycle length.
摘要:
Oxygen saturation data is monitored during a predefined window to obtain a measurement of circulation delay. The measured circulation delay is used as a basis for determining therapies, including overdrive pacing. In some embodiments, circulation delay is used to identify patients that will benefit from overdrive pacing as a therapy for sleep disordered breathing.
摘要:
The invention relates generally to a system and method for monitoring and automatically delivering a therapy for sleep-related disordered breathing. In one form the present invention relates to an external device for monitoring for sleep-related disordered breathing in communication with an implantable medical device for delivering an electrical stimulation therapy. In another form the present invention relates to an implantable medical device for detecting sleep-related disordered breathing episode(s) and an external apparatus (e.g., a CPAP machine) for providing therapy to terminate, and/or reduce, said episode(s). In this form of the invention, the implantable medical device communicates with the external apparatus so that the therapy provided corresponds in magnitude and duration to the severity and/or length of the episode(s). In yet another form, an implantable apparatus detects said disordered breathing episode(s) and a hybrid therapy is provided by both the implantable apparatus and an external apparatus.
摘要:
A system and method for monitoring respiration including sensing a signal that varies with respiration, deriving a respiration parameter, applying criteria for detecting a respiration disturbance and determining one or more respiratory disturbance metrics. The system preferably includes an implantable sensor with an associated implantable medical device such that chronic respiration monitoring is possible. The implantable medical device may execute methods for detecting and measuring respiratory disturbances or may store data to be transferred to an external device for detecting and measuring respiratory disturbances. Respiratory disturbance detection may trigger a responsive action such as physiological data storage, a change in therapy delivery, or a clinician warning. Assessment of cardiac function may be made based on metrics of respiratory disturbances or a measure of circulatory delay time following detection of a respiratory disturbance.
摘要:
A system and method for monitoring respiration including sensing a signal that varies with respiration, deriving a respiration parameter, applying criteria for detecting a respiration disturbance and determining one or more respiratory disturbance metrics. The system preferably includes an implantable sensor with an associated implantable medical device such that chronic respiration monitoring is possible. The implantable medical device may execute methods for detecting and measuring respiratory disturbances or may store data to be transferred to an external device for detecting and measuring respiratory disturbances. Respiratory disturbance detection may trigger a responsive action such as physiological data storage, a change in therapy delivery, or a clinician warning. Assessment of cardiac function may be made based on metrics of respiratory disturbances or a measure of circulatory delay time following detection of a respiratory disturbance.
摘要:
A method and apparatus for cardiac pacing are provided in which pacing pulses are delivered at an increased rate in response to a detected intrinsic heart rate drop and a special rate drop response detection scheme is temporarily disabled until an intrinsic heart rate exceeds a predetermined threshold value. If the pacing rate reaches the lower pacing rate without sensing intrinsic activity, heart rate drop detection remains disabled and lower rate pacing continues. Rate drop detection is re-enabled whenever sufficient sensed intrinsic activity indicates that a sudden intrinsic rate drop could occur again. Thus, the subsequent reduction in heart rate requiring therapy is declared only if a sensed intrinsic heart rate drops from above an intermediate value (herein defined as a re-enable rate) that is set above the lower pacing rate and an upper pacing rate.
摘要:
The present invention provides a method and apparatus for detecting and treating sleep respiratory events that includes a plurality of sensors gathering physiological data related to sleep respiratory events. A processor extracts an average cycle length and a frequency of at least one of Cheyne-Stokes respiration and periodic breathing based upon the physiological data, and determines whether therapy is required based on the average cycle length and the frequency.
摘要:
A method includes controlling a cardiac pacing rate of an implantable medical device (IMD) to control a heart rate of a patient and determining that the patient is in a resting state. The method further includes modifying the pacing rate of the IMD for N cardiac cycles in response to determining that the patient is in the resting state. N is an integer greater than 1. Modifying the pacing rate includes incrementally increasing the pacing rate for a first portion of the N cardiac cycles, and incrementally decreasing the pacing rate for a second portion of the N cardiac cycles.
摘要:
A medical device for determining a respiratory effort having a pressure sensor to sense pressure signals, a housing having system components positioned therein, and a microprocessor positioned within the housing, wherein the microprocessor detects an inspiration and an expiration in response to the pressure signals, detects a breath in response to the detected inspiration and the detected expiration, and determines the respiratory effort in response to the detected breath.
摘要:
A method of determining respiratory effort in a medical device in which pressure signals are sensed to generate corresponding sample points, an inspiration and an expiration are detected in response to the sensed pressure signals, a breath is detected in response to the detected inspiration and the detected expiration, and the respiratory effort is determined in response to the detected breath.