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).
There are several critical distinctions between BiPAP and a traditional ventilator: 1  BiPAP is non-invasive, requiring only a mask that can put on or taken off as needed. 2  BiPAP is not generally considered Life Support Equipment.. 3  A ventilator is generally set to deliver air according to volume.