To feel relaxed and refreshed in the morning, you must catch on a good night’s sleep. It is possible only if you do not have a sleep problem and your apnea-hypopnea index seems normal. In case it is not, you might be suffering from sleep apnea, where your breathing gets hindered at night. Having frequent episodes can disrupt rest, making you feel exhausted the next day. For people who would like to better understand AHI and how it affects their condition, more information is given in the next section. Have a look!
What is the AHI index?
For those wondering what is AHI, it basically means the apnea-hypoxia index. To break it down, apnea can be explained as a condition when you stop breathing for at least 10 seconds at night. On the other hand, hypopnea is when you are experiencing a partial blockage in your airway, because of which your breathing becomes shallower than normal.
Apnea –hypopnea index is a measure to know if you are suffering from sleep apnea. It tells how many apnea-hypopnea episodes you have per hour. So, if your index is 2, then it means that you experience at least two incidents of hypopnea or apnea per hour for every hour you rest. Experts consider an AHI less than five as okay. In some cases, when the patient is well-rested each morning, doctors are even ready to accept higher numbers.
Why does AHI change?
Patients with sleep apnea who use CPAP machines often complain of fluctuating AHI. Sometimes it records a spike out of the blue. Possible causes for this include:
Mask Leak: When using a CPAP machine, if there is a leakage in the mask, you might not get the required air pressure to open up the airway. This can tamper with the AHI index. The three most common causes of the mask leak are a poor fit mask, an unclean machine, and a mouth leak. So, you are advised to find a well-fitting mask and maintain cleanliness to ensure proper operations.
Mask off Events: When you start using the machine initially, it is normal to remove the mask consciously and unconsciously. Typically, it occurs because of a foreign feeling or discomfort attached to wearing a mask. Because of these events, your AHI index can fluctuate.
Alcohol or meds: CPAP users who periodically consume medication, alcohol, or narcotics may also notice their AHI index going up. It would help if you talked to your doctor in this case, as he may help you figure out a way to compensate for this.
Central sleep apnea: A rising AHI may indicate you have central sleep apnea. In this apnea, the inhalation process dysfunction is caused by the impaired working of the central nervous system.
If any of these issues is not responsible for causing alterations in the AHI index, you must talk to your doctor to identify the reason.
AHI index refers to the number of apneas or hypopnea episodes in one hour. The index changes may result from mask leaks, mask off events, central sleep apnea, or alcohol consumption.