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Re: Confused

Posted by Fog on August 30, 2001 at 15:48:21:

In Reply to: Confused posted by Carol on August 30, 2001 at 12:40:29:

"ramp" is merely a time-delay feature whereby a person is allowed to drift off to sleep while the cpap machine slowly builds to the set pressure. Most 'ramps' are for 'five to thirty' minutes.

CPAP. one 'set' pressure. Inhalation and exhalation pressures are the same. Machine has to be set to whatever pressure was the highest the sleeper needed during his sleep test, even if that pressure setting was only needed for an hour or so.

BPAP. Two set pressures. Inhalation and Exhalation. About five to ten percent of cpap users have an Rx for a high pressure that makes exhalation difficult for them and they therefore benefit from BPAP or BiPap.

APAP or AutoPAP. A machine with a minimum and maximum pressure established by the Rx. The machine will always start off at the minimum setting and will increase its pressure as required by the sleeper according to the machine's feedback from measuring any of various parameters such as apneas, snoring, etc. The advantage of AutoPAP is that the sleeper will generally be at a lower pressure for most of the night and will only be at a higher pressure for perhaps 30% of the time. A cpap would have to have been set at that high pressure for all the night. Autopaps have different techniques for determining a sleeper's needs and different degrees of accuracy.

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