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).
1 Pressure: Pressure has dimensions of force/area, but blood pressure is measured in mmHg, which seems to be a length. 2  The unit actually refers to the pressure required to support a column of mercury 1 mm high.3  Conversion to a true pressure requires knowing the density of mercury and the gravitational force. Pressure: Pressure has dimensions of force/area, but blood pressure is measured in mmHg, which seems to be a length. 2  The unit actually refers to the pressure required to support a column of mercury 1 mm high.