Hello Guest, Welcome to Apnea Board !
As a guest, you are limited to certain areas of the board and there are some features you can't use.
To post a message, you must create a free account using a valid email address.

or Create an Account


New Posts   Today's Posts

How Does CPAP Machine Work?
#11
RE: How Does CPAP Machine Work?
Essentially, Gene is correct. However, I will put another spin on it. The machine is designed to sense flow resistance. The greater the flow resistance, the more pressure provided by the CPAP in order to keep the airway open. Of course, this is with an automatic machine. I fixed pressure machine maintains positive constant pressure throughout its cycle. An auto machine checks resistance on a breath to breath basis and evaluates the flow or resistance rate.
Sticking with the auto example, once an apnea begins, a CPAP senses the flow rate and increases the pressure until the apnea is eliminated. This cycle continues at every breath in order to fully eliminate each apnea event throughout the night. When there is no apnea event, the machine cycles down to the base pressure.
Post Reply Post Reply






Donate to Apnea Board  
#12
RE: How Does CPAP Machine Work?
(10-25-2012, 03:35 PM)thecpapshop Wrote: Essentially, Gene is correct. However, I will put another spin on it. The machine is designed to sense flow resistance. The greater the flow resistance, the more pressure provided by the CPAP in order to keep the airway open. Of course, this is with an automatic machine. I fixed pressure machine maintains positive constant pressure throughout its cycle. An auto machine checks resistance on a breath to breath basis and evaluates the flow or resistance rate.
Sticking with the auto example, once an apnea begins, a CPAP senses the flow rate and increases the pressure until the apnea is eliminated. This cycle continues at every breath in order to fully eliminate each apnea event throughout the night. When there is no apnea event, the machine cycles down to the base pressure.

This is correct, but there is still a problem. My machine (for example), even though it is on automatic setting, does not react fast enough. My doc initially prescribed the lower pressure at 5 cm, but over the past several months I have slowly raised it to 8 cm. And I'm thinking about raising the lower limit a bit more. Thus, when an apnea or hypopnea occurs, the machine doesn't have so far to go in order to supply enough pressure.
Post Reply Post Reply
#13
RE: How Does CPAP Machine Work?
(10-25-2012, 03:35 PM)thecpapshop Wrote: Sticking with the auto example, once an apnea begins, a CPAP senses the flow rate and increases the pressure until the apnea is eliminated. This cycle continues at every breath in order to fully eliminate each apnea event throughout the night.
aiming for zero AHI every single night is unrealistic and impossible task. the aim is to prevent collapse of the airways but cannot prevent every single collapse. if the S9 autoset detect the airways are open .. no pressure increase.





Post Reply Post Reply
#14
RE: How Does CPAP Machine Work?
More information about how a cpap works.
http://patents.com/us-20120227738.html
GeneS
Post Reply Post Reply






Donate to Apnea Board  
#15
RE: How Does CPAP Machine Work?
(11-04-2012, 10:27 PM)genes Wrote: More information about how a cpap works.
http://patents.com/us-20120227738.html
GeneS

Cool.... thanks!

Coffee
SuperSleeper
Apnea Board Administrator
www.ApneaBoard.com


INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.




#apneaboard
Post Reply Post Reply
#16
RE: How Does CPAP Machine Work?
Just google "how do cpap machines work". Wickipedia has a great explanation.
Good luck,
Mary
Post Reply Post Reply
#17
RE: How Does CPAP Machine Work?
Hi. OK. Thanks. Very good info. Regards, Bob.
Post Reply Post Reply






Donate to Apnea Board  


Possibly Related Threads...
Thread Author Replies Views Last Post
Exclaimation CPAP Machine Choices - read this before you accept a new machine SuperSleeper 189 191,036 Yesterday, 04:52 PM
Last Post: OpalRose
  Will this work for battery power for Resmed S9? Lanco 7 117 Yesterday, 11:41 AM
Last Post: Nightynite
  Has any heard of this?? It seems unlikely to work… https://www.schlafapnoe.com/en/tre racprops 5 419 05-09-2021, 12:13 PM
Last Post: Douglas Morrrison
  aromatherapy oils in cpap machine somnia16 26 19,042 03-23-2021, 02:11 AM
Last Post: Doctor
  Recommendation for CPAP machine, mask with low noise level Rgn3 4 320 03-13-2021, 03:15 PM
Last Post: Rgn3
  Restarting CPAP after 4 years: does machine need cleaning? Kevin521 3 461 03-04-2021, 09:53 PM
Last Post: SarcasticDave94
  Help Dialing In New CPAP Machine khw210 11 541 02-27-2021, 08:48 AM
Last Post: khw210


New Posts   Today's Posts






About Apnea Board

Apnea Board is an educational web site designed to empower Sleep Apnea patients.