DETERMINING SUITABLE VENTILATOR SETTINGS FOR PATIENTS WITH ALVEOLAR HYPOVENTILATION DURING SLEEP

• US 20100037895A1
• Filed: 10/07/2009
• Published: 02/18/2010
• Est. Priority Date: 03/07/2000
• Status: Active Grant

• Current Assignee: ResMed Pty Ltd. (ResMed Incorporated)
• Original Assignee: Resmed Limited (ResMed Incorporated)
• Inventors: Berthon-Jones, Michael, Malouf, Gordon, Bassin, David, Bateman, Peter
• Granted Patent: US 8,544,467 B2
• Time in Patent Office: Days
• US Class Current: 128/204.230
• CPC Class Codes: A61M 16/00 Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes stimulating the respiratory movement by mechanical, pneumatic or electrical means, iron lungs combined with gas breathing means A61H31/00
• CPC Class Codes: A61M 16/0066 Blowers or centrifugal pumps
• CPC Class Codes: A61M 16/0069 the speed thereof being controlled by respiratory parameters, e.g. by inhalation
• CPC Class Codes: A61M 16/026 specially adapted for predicting, e.g. for determining an information representative of a flow limitation during a ventilation cycle by using a root square technique or a regression analysis
• CPC Class Codes: A61M 16/06 Respiratory or anaesthetic masks
• CPC Class Codes: A61M 16/0858 Pressure sampling ports
• CPC Class Codes: A61M 2016/0021 with a proportional output signal, e.g. from a thermistor
• CPC Class Codes: A61M 2016/0036 in the breathing tube and used in both inspiratory and expiratory phase

Abstract

A method and apparatus for determining suitable settings for a servo-ventilator to be used during sleep. Respiratory characteristics of a patient are measured during an awake learning period. With these measured characteristics, a target ventilation setting may be calculated by alternative methods. The calculated setting may then be used for enforcing a minimum ventilation during a treatment period where ventilatory support is provided with a servo-controlled ventilator.

Claims

1-49. -49. (canceled)

50. A method for determining how to deliver and then delivering ventilation to a patient comprising the steps of:

during a learning period delivering a fixed degree of support to the patient sufficient to make the patient feel comfortable and measuring the patient'"'"'s ventilation;

selecting a target ventilation for use during the patient'"'"'s sleep, which target ventilation is just under the ventilation measured during the learning period; and

operating a ventilator during a subsequent treatment period by varying the pressure delivered to the patient so that the patient'"'"'s ventilation is maintained at the selected target ventilation.

51. The method for determining how to deliver and then delivering ventilation to a patient in accordance with claim 50 wherein said learning period takes place while the patient is awake.