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Blaifarm Offline

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Posts: 28
Joined: Oct 2013

Machine: ResMed S9 AutoSet
Mask Type: Nasal mask
Mask Make & Model: Philips Respironicss Wisp Nasal Mask
Humidifier: ResMed H5i
CPAP Pressure: 5 - 15
CPAP Software: ResScan

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Sex: Male
Location: Texas

Post: #1
I read in another thread that hypopneas could be obstructive or central in nature. What does this mean? I was diagnosed with 10.5 hypopneas per hour during an in-lab sleep test. Why wouldn't the doctor just say what kind of event?

I was taking six hydrocodone 10/325 at the time of the test and when I began looking at my results on Rescan software, I was seeing many more hypopneas than anything else. So, anyway, I cut way back on the hydrocodone and now do not have near as many centrals as I was.
05-20-2015 12:09 AM
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iSnore Offline

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Posts: 148
Joined: Apr 2015

Machine: Phillips-Respironics DS560TS REMstar Auto
Mask Type: Nasal pillows
Mask Make & Model: ResMed AirFit P10
Humidifier: Phillips-Respironics DS6T Heated Tube
CPAP Pressure: 9-13 A-Flex 2
CPAP Software: SleepyHead EncoreBasic

Other Comments: SYSTEM ONE resistance set to X1 for P10

Sex: Male

Post: #2
RE: Hypopneas
An apnea is defined as the cessation of airflow for 10 seconds or more, but the machines score a reduction of 80% or more as an apnea. They then send out pulses of air to check for obstruction.
- An obstructive apnea is defined as a complete cessation of airflow, caused by an obstruction in the upper airway, and accompanied by a struggle to breathe for 10 seconds or more.
- A central apnea is defined as a complete cessation of airflow and no effort to breathe for 10 seconds or more. The machines score an unobstructed airway as a clear airway apnea event or a central apnea event.

A hypopnea is a decrease in airflow by at least 50% for ten seconds or more, with a 3% desaturation of blood oxygen level. The machines don't typically measure oximetry and don't check for obstruction, so hypopneas aren't differentiated as obstructive or clear/central and we typically don't differentiate when discussing them.
05-20-2015 05:39 AM
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