Systems and methods for determining respiration metrics

摘要

Systems, devices and methods provide for acquiring respiration information. A respiration information device includes timer circuitry to time a plurality of shorter time apertures and a plurality of longer time apertures. A respiration sensor, which may be implemented as a transthoracic impedance sensor, is configured to generate a signal indicative of patient respiration. For each aperture of the plurality of shorter time apertures and for each aperture of the plurality of longer time apertures, an estimated characteristic of the respiration is determined. Respiration metrics are developed using one or both of the estimated respiration characteristics of the shorter time apertures and the estimated respiration characteristics of the longer time apertures.

主权项

1. An implantable medical device, comprising:
an input for receiving a signal indicative of respiration of a patient; circuitry communicatively coupled to the input and configured to:
determine for each of at least some of a plurality of shorter time apertures and for each of at least some of a plurality of longer time apertures, an estimated respiration characteristic of a patient based, at least in part, on the signal indicative of respiration of the patient; anddetermine two or more respiration metrics including determining a maximum respiration metric based at least in part on the estimated respiration characteristics for at least two of the plurality of shorter time apertures and determining a minimum respiration metric based at least in part on the estimated respiration characteristics of at least two of the plurality of longer time apertures; and a therapy unit communicatively coupled to the circuitry for providing an output that is based, at least in part, on one or more of the maximum respiration metric and the minimum respiration metric, and for controlling at least in part a therapy to the patient and/or monitoring an effectiveness of a therapy delivered to the patient.