Variable breathing

Dano1465 wrote: ↑

Sat Feb 25, 2023 2:11 pm

Would anyone know what defines a variable breathing event?

Pugsy wrote: ↑

Sat Feb 25, 2023 5:13 pm

Dano1465 wrote: ↑

Sat Feb 25, 2023 2:11 pm

Would anyone know what defines a variable breathing event?

I have never been able to find a suitable reference for what Respironics calls "variable breathing" or why they created that data point. Nor have I been able to find anything that explains what is "normal" or "abnormal".

Variable Breathing Pressure Control

Once the variable breathing controller has been granted control of the pressure support system, it takes some initial action based on the action the auto-CPAP controller is taking. After this initial action, it performs an independent pressure control operation.

A prior pressure that is flat will cause the pressure delivered to the patient to remain at that level.

A prior pressure that is increasing will cause the variable breathing controller to initially decrease the pressure delivered to the patient at a rate of 0.5 cmH2O per minute. The magnitude of the decrease is dependent on the magnitude of the increase in prior pressure. The pressure decrease is intended to erase the prior pressure increase that possibly caused the variable breathing. However, the total decrease in pressure drop is limited to 2 cmH2O. After pressure decrease, the variable breathing controller holds the pressure steady.

A prior pressure that is decreasing will cause the variable breathing controller to initially increase the pressure delivered to the patient at a rate of 0.5 cmH2O per minute. The magnitude of the increase is dependent on the magnitude of the decrease in prior pressure. The pressure increase is intended to erase the prior pressure decrease that may have caused the variable breathing. However, the total increase in pressure is limited to 2 cmH2O. After pressure increase, variable breathing controller holds the pressure steady.

The pressure curve is provided for 5 minutes or until the variable breathing condition clears. Thereafter, the pressure is controlled according to the following:

The pressure is either maintained at a constant value, or it follows a decrease and hold pattern. The decision to hold the pressure or to decrease the pressure is made by comparing the current pressure with the snore treatment pressure. It is to be understood, however, that this duration can be varied over a range of durations.

If there is no snore treatment pressure stored in the system, which will be the case if the snore controller has not been activated, the pressure is held constant. If there is a snore treatment pressure, and if the current pressure is more than a predetermined amount above this snore treatment pressure, such as more than 2 cmH2O above the snore treatment pressure, the variable breathing controller decreases the pressure to a level that is a predetermined amount higher than the snore treatment pressure and holds the pressure at the lower level. The pressure decreases to the snore treatment pressure +1 cmH2O.

The duration during which pressure is provided according to the paradigms discussed above for region is set to 15 minutes or until the variable breathing condition clears. It is to be understood, however, that this 15 minute duration can be varied over a range of durations.

Dano1465 wrote: ↑

Sat Feb 25, 2023 2:11 pm

Hi

Last night I had 22 variable breathing events (23.32%). Would anyone know what defines a variable breathing event?

I did supply a link to my data. I also trying to post the image but it said "Sorry, the board attachment quota has been reached".

https://imgur.com/gallery/hvFJgxV

Thanks