Speaking roughly, normal levels of thyroid-stimulating hormone (TSH) are in the range of 0.4 to 4.0 mIU/L. However, each laboratory and test manufacturer identifies its own normal TSH range.
This pressure is typically set slightly higher than atmospheric pressure to prevent atelectasis, decrease inspiratory work of breathing, or improve gas exchange depending on the clinical scenario. This positive end-expiratory pressure (PEEP) is generated by a resistor in the exhalation port of the ventilator (Fig. 2).
Loading. A bilevel positive airway pressure (BIPAP) machine features two pressure settings, high and low, to deliver room air through a mask into your airway. To match your natural breathing rhythm, the high pressure setting is used for inhaling, and the low pressure setting is used for exhaling. Many people who use a BIPAP machine for sleep disorders find that it is an easily tolerated way to keep the airway while sleeping.