Respiratory muscle endurance training device and method for the use thereof
A respiratory muscle endurance training device (RMET) includes a chamber and a patient interface. In one implementation, one or both of a CO 2 sensor or a temperature sensor can be coupled to the chamber or patient interface to provide the user or caregiver with indicia about the CO 2 level in, or the temperature of, the chamber or patient interface, and/or the duration of use of the device. In another implementation, the RMET may have a fixed volume portion adjustable to contain a measured portion of a specific patient's inspiratory volume capacity. Methods of using the device are also provided.
1. A method of training a user's respiratory system comprising:
providing an adjustable chamber;
determining a suitable interior volume of said adjustable chamber for a user;
adjusting said adjustable chamber to said interior volume, wherein said adjustable chamber comprises an output end, wherein said adjusting said adjustable chamber comprises moving mating first and second chamber portions toward and away from each other;
successively inhaling and exhaling a plurality of breathing cycles through a patient interface coupled to said output end without altering said interior volume;
capturing expired gases in said interior volume during said exhaling through said patient interface and thereby increasing a concentration of CO 2 in said interior volume; and
reinhaling said expired gases from said interior volume through said patient interface.
2. The method of claim 1 wherein said suitable interior volume comprises a first interior volume and further comprising determining a suitable second interior volume and adjusting said adjustable chamber from said first interior volume to said second interior volume.
3. The method of claim 1 wherein said first and second chamber portions comprise cylindrical portions.
4. The method of claim 3 wherein said first chamber portion is shaped to fit within said second chamber portion.
5. The method of claim 1 comprising a seal disposed between said first and second chamber portions.
6. The method of claim 1 further comprising a detent mechanism disposed between said first and second chamber portions and defining a plurality of index positions corresponding to a plurality of interior volumes, wherein said adjusting said adjustable chamber to said interior volume comprises moving said first and second chambers relative to each other to one of said index positions.
7. The method of claim 1 wherein said concentration of CO 2 in said interior volume is at least 2.0%.
8. The method of claim 7 wherein said concentration of CO 2 in said interior volume is at least 5.0%.
9. The method of claim 1 wherein said successively inhaling and exhaling through said patient interface comprises taking between 16-30 breaths per minute.
10. The method of claim 9 wherein said taking between 16-30 breaths comprises taking 20 breaths per minute.
11. The method of claim 9 further comprising prompting said user to take said breaths at predetermined time intervals.
12. The method of claim 11 wherein said predetermined time intervals comprise a 3 second time interval.