What do AHI and EPR mean?

My CPAP machine is set to EPR level 2. My AHI last night was 4.1 (it varies from night to night; another night it might be 10). What do the initials AHI and EPR stand for and what are their significance?

btm1 wrote:My CPAP machine is set to EPR level 2. My AHI last night was 4.1 (it varies from night to night; another night it might be 10). What do the initials AHI and EPR stand for and what are their significance?

As a quick answer, EPR is Exhalatory Pressure Relief, and refers to a small reduction in pressure at the start of the exhalation to make breathing out against the pressure more comfortable. Typically the settings are 0 - 3 representing none and three increasing levels of pressure relief. AHI is Apnea Hypopnea Index and refers to the average number of Obstructive Apneas, Clear Airway Apneas, and Hyopneas per hour of sleep. These are all respiratory disturbances expected to result in significant drops in blood oxygen and sleep disruption. The rough AHI categories are Normal (<5), Mild (5-15), Moderate (16-30), and Severe (30+).

djhall wrote:

btm1 wrote:My CPAP machine is set to EPR level 2. My AHI last night was 4.1 (it varies from night to night; another night it might be 10). What do the initials AHI and EPR stand for and what are their significance?

As a quick answer, EPR is Exhalatory Pressure Relief, and refers to a small reduction in pressure at the start of the exhalation to make breathing out against the pressure more comfortable. Typically the settings are 0 - 3 representing none and three increasing levels of pressure relief. AHI is Apnea Hypopnea Index and refers to the average number of Obstructive Apneas, Clear Airway Apneas, and Hyopneas per hour of sleep. These are all respiratory disturbances expected to result in significant drops in blood oxygen and sleep disruption. The rough AHI categories are Normal (<5), Mild (5-15), Moderate (16-30), and Severe (30+).

Thank you for that AHI information - I had some idea what it meant, but didn't know the categories.

Anyone wondering about all the acronyms....this glossary has most of them.
http://sourceforge.net/apps/mediawiki/s ... r_Glossary

The cpap Wiki has a few others.
Main page of the forum where the light bulb is
wiki/index.php/Main_Page