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One patient said: "I was diagnosed with severe OSAS, and my diagnosis was "airway stenosis" during the fiberoptic nasolaryngoscopy. The doctor said I was not suitable for surgery and recommended ventilator treatment and weight loss. I bought a CPAP (continuous positive airway single pressure Auto CPAP) on the advice of my doctor. My family said that every time I snored after I fell asleep, the machine increased the pressure from 4cmH2O up to 19cmH2O, and then it stayed at 19cmH2O. During the first few hours of sleep with CPAP, I woke up because the machine pressurized me when I snored, and I felt difficulty in breathing. What should I do?"
There are many patients who have the same problem. Next, we will explain in detail why you feel shortness of breath and wake up from sleep with CPAP machine treatment, and how to solve it.
Patients with nasal polyps, deviated nasal septum, and nasal discomfort should use a CPAP machine after surgical correction of these deformities, and patients with severe sinusitis should also go to ENT department for appropriate treatment first. Obese patients shall lose weight.
The cold air produced by the CPAP ventilator can stimulate the nasal mucosa, causing vasodilation and mucosal congestion with edema, and some patients with allergic rhinitis may have acute onset.
It is important to strengthen the humidification by adding warm water to the humidification bottle if necessary or even using a thermostatic humidifier, and nasal mucosal constrictors such as ephedrine in nasal drops during sleep are also useful.
The first time you use it, you may feel a lot of pressure and will unconsciously hold your breath. Due to your sympathetic excitement, it is important to correct the hypoxia in time to avoid damage to the heart muscle and brain. Patients should try to adjust their mindset, calm their mood and breathe according to their usual rhythm.
Because the pressure of the single pressure CPAP is unidirectional, and the exhalation pressure has to do a confrontation with the inhalation pressure, if the night pressure demand is too high, there will be outward exhalation effort.
If this happens to you at first, it is a normal phenomenon, you can adapt to it for a few days, and generally speaking, you can adapt to it in less than a week, if you can't adapt to it, you have to adjust the parameters, you can adjust the maximum pressure a little bit, so that the user can use it at night first, and then adjust the pressure after slowly adapting to it.
At the beginning of CPAP therapy, the patient's REM sleep phase is rebounded and the upper airway is prone to complete or incomplete obstruction, resulting in shortness of breath awakening. By increasing the pressure of the CPAP machine, the discomfort disappears in some patients. Patients who are obese (respiratory pressure is related to body weight) and have severe apnea generally require higher CPAP machine pressure.
However, it is usually difficult to tolerate such high pressures, so we recommend suspending the use of single pressure CPAP machines and replacing them with bilevel pressure CPAP. Because there are two pressures in the automatic bilevel pressure CPAP, one is the inspiratory pressure and one is the expiratory pressure, there is a pressure difference between one inspiratory and one expiratory, so the comfort level of bilevel pressure CPAP will be higher.
Any new CPAP user has to go through a period of learning and adaptation before he or she is comfortable using it. The average patient takes 3 nights or more to get used to it. Younger patients have better tolerance and mastery than older patients and those with milder conditions, and require a degree of patience. Any problems that arise during use should be reported to the physician in a timely manner so that they can be resolved in a timely manner.
It is better to choose the automatic mode when applying the single pressure CPAP. It takes a lot of experience to learn how to wear the mask without air leakage and with proper tightness, clean it regularly, and use the ramp time function appropriately. Failure to pay attention to any of the smallest aspects may result in treatment failure or loss of confidence in treatment.