Methods and Apparatus for Pressure Therapy in the Treatment of Sleep Disordered Breathing

• Main Authors: BARNES, ADRIAN, SOMAIYA, CHINMAYEE, OATES, JOHN DAVID, YIP, NICHOLAS MING YUN, BLUNSDEN, CHRISTOPHER KINGSLEY
• Format: Patent
• Language: English
• Published: 02.10.2014
• Subjects: BANDAGES, DRESSINGS OR ABSORBENT PADS; DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; DIAGNOSIS; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PROSTHESES; SURGERY; TREATMENT OR PROTECTION OF EYES OR EARS

METHODS AND APPARATUS FOR PRESSURE THERAPY IN THE TREATMENT OF SLEEP DISORDERED BREATHING A controller or processor 312 for a respiratory pressure treatment device determines an estimate of patient respiratory flow 308 based on a measure of pressure 302 associated with flow 304 generated by a flow generator and a measure of frequency of the flow generator, such as a rotational velocity of a servo-controlled blower motor. The estimate can be made without data from a flow sensor. The measure of frequency may be converted to an expected pressure based on characteristics of the flow generator and subtracted from the measured pressure to determine the flow estimate. The flow estimate can be implemented in the provision of respiratory pressure treatment with the flow generator. For example, the flow estimate may be utilized to trigger expiratory pressure relief during a patient's expiration as detected with the estimated flow signal. C)C 70 -t C.)D CV)) C/) C/)cnn -' 87a3 C) -C)