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).
Diastolic pressure (DBP), on the other hand, refers to the residual pressure generated by the recoil of the walls of the arteries, in the split second when the heart is not squeezing, but rather filling (reloading) with blood. (SBP-DBP) = pulse pressure.