Determining suitable ventilator settings for patients with alveolar hypoventilation during sleep
First Claim
Patent Images
1. A method for determining at least one setting of a ventilator to be used during sleep comprising the steps of:
- measuring at least one respiratory characteristic of a patient during at least a latter portion of a learning period while the patient is awake; and
determining at least one setting value from said at least one respiratory characteristic to be used for the operation of said ventilator during a subsequent treatment period of sleep.
2 Assignments
0 Petitions
Accused Products
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.
-
Citations
49 Claims
-
1. A method for determining at least one setting of a ventilator to be used during sleep comprising the steps of:
-
measuring at least one respiratory characteristic of a patient during at least a latter portion of a learning period while the patient is awake; and
determining at least one setting value from said at least one respiratory characteristic to be used for the operation of said ventilator during a subsequent treatment period of sleep. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
-
-
32. A ventilator comprising:
-
a means for delivering ventilatory support to a patient;
a means for determining the patient'"'"'s respiratory airflow;
a means for calculating a measure of ventilation from said respiratory airflow; and
a means for controlling said ventilatory support to maintain said measure of ventilation to at least equal a target ventilation, wherein said ventilator can be switched between a learn mode and a treat mode where said ventilator automatically calculates a target ventilation based on a learning period from said learn mode, and in said treat mode said ventilator delivers ventilatory support using said target ventilation calculated from said learn mode. - View Dependent Claims (33, 34, 35, 36, 37, 38)
-
-
39. An apparatus for determining ventilation settings comprising:
-
a mask;
a blower to supply pressurized air to said mask;
a servo-controller coupled to said blower;
a transducer to generate a flow signal representing air supplied to said mask; and
a processor, coupled to said transducer and said servo-controller, to execute instructions;
wherein said instructions implement switchable learn and treat modes in which said processor calculates a measure of ventilation from said flow signal during a learning period in a learn mode; and
calculates a target ventilation as a function of said measured ventilation for use in a treat mode;
calculates a pressure request during a treat mode to control delivery of said pressurized air to said mask wherein a degree of ventilatory support maintains patient ventilation to equal at least said target ventilation determined from said learn mode. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
-
Specification