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.
A common strategy is to combine SIMV with an additional ventilator mode known as pressure support ventilation (PSV) (Fig. 4). In this situation, inspiratory pressure is added to spontaneous breaths to overcome the resistance of the endotracheal tube or to increase the volume of spontaneous breaths.
Bipap Machines. BiPAP stands for Bilevel Positive Airway Pressure, and is very similar in function and design to a CPAP machine. Unlike a CPAP machine which delivers a constant standard pressure, a BiPAP machine has two pressure settings. One pressure is for inhalation (IPAP), and a lower pressure for exhalation (EPAP). When you breathe in, the pressure will increase to the prescribed amount, and lower during exhalation.