The nurse suspects that which condition associated with chronic heart failure is the cause of a patient's inability to sleep well due to frequent urination?

Choice A rationale:

0.459% saline is a hypotonic solution with a lower concentration of salt than the normal physiological range (0.9% NaCl) Hypotonic solutions can cause red blood cells to swell and potentially burst due to the osmotic imbalance, making it inappropriate for hypovolemic shock.

Choice B rationale:

0.9% NaCl, also known as normal saline, is an isotonic solution with a salt concentration similar to the body's own fluids. Isotonic solutions are ideal for hypovolemic shock as they help to expand the intravascular volume without causing significant shifts of fluid and electrolytes within the body compartments.

Choice C rationale:

5% dextrose in 0.45% saline is a hypotonic solution with a low salt concentration. While it provides some fluid replacement, it doesn't address the electrolyte imbalance adequately, which is crucial in hypovolemic shock.

Choice D rationale:

Dextran is a plasma volume expander but is not the first-line choice for hypovolemic shock. It might be used in certain situations, but isotonic crystalloids like 0.9% NaCl are preferred for rapid volume expansion and stabilization of the patient.

Choice A rationale:

A normal blood pressure reading is typically around 120/80 mm Hg. The given reading of 142/91 mm Hg indicates elevated blood pressure.

Choice B rationale:

Prehypertension is defined as systolic blood pressure between 120-139 mm Hg or diastolic blood pressure between 80-89 mm Hg. The diastolic reading of 91 mm Hg places this patient in the stage 1 hypertension category.

Choice D rationale:

Hypertension, stage 2, is characterized by a systolic blood pressure of 140 mm Hg or higher and a diastolic blood pressure of 90 mm Hg or higher. While the systolic reading meets the criteria, the diastolic reading of 91 mm Hg falls into the stage 1 hypertension category.