What is the most accurate indicator of fluid loss or gain in acutely ill patients?
Daily weight.
Intake and output.
Serum osmolality.
Urine specific gravity.
The Correct Answer is A
The correct answer is choice A. Daily weight.
According to MDCalc, daily weight is the most accurate indicator of fluid loss or gain in acutely ill patients, as it reflects changes in total body water.
A weight change of 1 kg corresponds to a fluid change of approximately 1 L.
Choice B is wrong because intake and output measurements can be inaccurate or incomplete, and do not account for insensible fluid losses.
Choice C is wrong because serum osmolality reflects the concentration of solutes in the blood, not the volume of fluid.
Choice D is wrong because urine specific gravity reflects the concentration of solutes in the urine, not the volume of fluid.
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Related Questions
Correct Answer is B
Explanation
An isotonic solution has the same concentration of solutes as the blood plasma. 0.9% sodium chloride solution is an example of an isotonic solution.
It is used to supply water and salt to the body and to prevent hypotension induced by spinal anaesthesia.
Choice A is wrong because a hypotonic solution has a lower concentration of solutes than the blood plasma.
It can cause water to move into the cells and cause them to swell.
Choice C is wrong because a hypertonic solution has a higher concentration of solutes than the blood plasma.
It can cause water to move out of the cells and cause them to shrink.
Choice D is wrong because a colloid solution contains large molecules that do not pass through the capillary walls.
It is used to increase the blood volume and pressure in cases of shock or severe blood loss.
Correct Answer is B
Explanation
Uremia is a condition where there is an excess of urea and other nitrogenous wastes in the blood, usually excreted by the kidneys into the urine. It occurs when the kidneys stop filtering toxins out through your urine and can be a sign of end-stage renal (kidney) disease.
Choice A is wrong because azotemia is the buildup of nitrogen waste products in the blood, not urea.
Choice C is wrong because anuria is the absence or reduction of urine output.
Choice D is wrong because oliguria is the low output of urine.
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