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.
Pressure assist toilets offer a strong flush, but they cost more than other toilet types. These toilets have a pressure tank inside that works like a big water balloon. Water fills the tank and is held there under pressure. When the flush valve opens, pressure and gravity combine for an explosive flush.