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.
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.