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).
Let me also explain BiPAP. It stands for Bilevel Positive Airway Pressure. There are two pressure settings, an inspiratory pressure and an expiratory pressure. The inspiratory pressure is intended to give a push of air on inspiration to help ease the work of breathing.