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).
The pressure is adjustable. There are several potential modifications to the way the air can be delivered. The BiPAP or bilevel machine is very similar to the C â PAP machine. Utilizing the identical setup as a CPAP with tubing, masks and a machine, the BiPAP makes use of a special setting. While CPAP utilizes one pressure, BiPAP uses two pressures. These two pressures are known as inhalation positive airway pressure (IPAP) and exhalation positive airway pressure (EPAP).