Pulmonary Capillary Wedge Pressure (PCWP) Measurements Can Be Used to Estimate

Pulmonary capillary wedge pressure (PCWP) measurements can be used to estimate left atrial pressure; the normal range is between 6-12 mm Hg, and recorded values are whole numbers.  A patient in the intensive care unit has 20 serial PCWP measurements taken over the course of 2 hours.  Among these 20 observations, the maximal recorded value is 12 mm Hg and the minimal recorded value is 10 mm Hg.  If the next measurement is 26 mm Hg, which of the following is most likely to remain unchanged?

A) Mean
B) Mode
C) Range
D) Standard deviation
E) Variance

Correct Answer:

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