Sleep apnea testing
If you are about to undergo testing for sleep apnea then you you will likely be monitored from something like 8pm to the next morning. You may be nervous about this procedure, because it is already an issue to sleep by yourself and here you will be connected to a device for measurements and monitoring. But don’t worry, the specialists surely know what they are doing and actually it is not expected that you sleep the entire duration in order to derive the correct diagnosis. Although your sleep may possibly far more erratic than typical, you may surely sleep lengthy enough to obtain a legitimate research.
Sleep studies (polysomnographs) are ordered by a physician to test for the treatable rest disorder including obstructive sleep apnea (OSA), a situation through which the patient’s airway becomes blocked in the course of sleep or rest. The tongue and/or soft palate might block the airway, which makes the breathing grow to be dangerously shallow or might stop altogether. Apnea, by the way, indicates “no breath”. The affected individual wakes, just sufficient to take some breaths, then falls back again to sleep. This can take place a lot of times per hour, destroying the quality of sleep, which has a number of negative consequences both directly and indirectly connected to sleep apnea.
A much less significant type of this difficulty is upper airway resistance syndrome, through which rest is once again fragmented, but unlike OSA, breathing hardly ever stops totally. Nonetheless, patients with upper airway resistance syndrome nevertheless are afflicted by severe daytime sleepiness on account of poor sleep quality.
Throughout a polysomnograph the brain waves are monitored (electroencephalogram) as well as heart rhythm (electrocardiogram), eye movements, blood oxygen content material, muscle activity and respiratory exercise. The goal of the research is to learn some things about performance during sleep or rest and it does not matter whether you might have breathing problems in the course of sleep. Should you have them then it is possible to investigate how extreme they are and if your blood oxygen drops to harmful levels as well as if you develop harmful alterations in heart rhythm on account of your breathing issues.
Focusing on the brain waves… the brain by itself is rather small, filled with neurons (nerve cells), blood vessels and cells that serve a supportive role for the neurons. Neurons intercommunicate as well as make connections with the rest of the body, by electrochemical impulses. A tiny electrical charge is transferred down the length of the neuron. Every time an electrical charge moves, electromagnetic waves are emitted. An electroencephalogram (EEG) measures the electromagnetic waves emitted by the brain as a result of neuronal electrical occurrence.
Sleep is a lot more complex than most folks realize. It can be explained as consisting of alternating quick eye movement REM and NREM (non-REM) phases. NREM rest is divided into four phases according to the type of brain waves detected by EEG. By measuring eye movements and EEG, a sleep examine can thus characterize just how much time you spend in these phases of sleep.
This can be substantial for two factors. By measuring the duration in different phases of sleep, we are able to decide sleep efficiency. Measurement of EEG and eye motion frequency gives the answer to the question about the ability to sleep during the test. It is not possible to fake the EEG patterns of deep rest, and it is possible to fake REM only with serious premeditated preparation. Therefore, the sleep study will definitely show whether you slept at all during the research.
It’s fairly common that people believe or say that the test was a waste of time because they did not manage to sleep at all due to anxiety or their sleep disorder, however do bear in mind the devices and measurements explained above to understand that the observations collect a lot more than what you are aware of as a patient. It could also be that your sleep is highly fragmented and these waking moments are going to be scattered throughout the night, offering you the impression that you never slept. The truth of the matter might be which you slept all evening – but you slept poorly!