Patent ID: 9050024
Filing Date: 2015-06-09
Classification: A61B,A61N

Abstract:
1. A method for identifying a respiratory disorder in a patient using a device implanted in the patient, comprising: sensing patient sounds, analyzing frequency and amplitude of the patient sounds to determine airflow, measuring said patient's transthoracic impedance to determine thoracic movement, and identifying the respiratory disorder to distinguish central apnea and obstructive apnea based upon the determined airflow and determined thoracic movement; said device implanted in the patient including a microphone to sense patient sounds, a processor to analyze the frequency and amplitude of the sensed patient sounds to determine airflow, and an impedance detector to detect transthoracic impedance by 1) emitting high frequency electrical pulses to traverse the transthoracic cavity, and 2) calculating instantaneous transthoracic impedance across said transthoracic cavity.