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).
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.