What is the most accurate indicator of fluid loss or gain in acutely ill patients?

Dysuria, which means pain or a burning sensation when peeing, is a common symptom of urinary tract infection (UTI).

UTIs are caused by bacteria entering the urinary tract through the urethra and spreading to the bladder or kidneys.

Choice A is wrong because nausea is not a specific symptom of UTI, although it may occur if the infection spreads to the kidneys.

Choice B is wrong because diarrhea is not a symptom of UTI, but rather a condition that affects the digestive system.

Choice D is wrong because constipation is also not a symptom of UTI, but a problem with bowel movements.

Normal ranges for urine tests vary depending on the type of test and the laboratory that performs it.

However, some general ranges are:

Specific gravity: 1.005 to 1.030

pH: 4.6 to 8.0

Protein: less than 150 mg/dL Glucose: less than 130 mg/dL Ketones: none

Blood: none Nitrites: none

Leukocyte esterase: none Bacteria: none or few

White blood cells: less than 5 per high-power field Red blood cells: less than 3 per high-power field Epithelial cells: few

This is because hemodialysis removes excess fluid and waste products from the blood, but it also removes some electrolytes, such as potassium.

Potassium is important for nerve and muscle function, especially the heart.

If potassium levels are too high or too low, it can cause irregular heartbeat or cardiac arrest.

Choice B is wrong because hypokalemia means low potassium levels, which is unlikely in renal failure unless there is excessive potassium loss from diarrhea, vomiting or diuretics.

Choice C is wrong because hyponatremia means low sodium levels, which can occur in renal failure due to fluid retention, but it is not directly related to hemodialysis.

Choice D is wrong because hypernatremia means high sodium levels, which can occur in renal failure due to reduced urine output, but it is also not directly related to hemodialysis.

Normal ranges for electrolytes are: Potassium: 3.5 to 5.0 mmol/L

Sodium: 135 to 145 mmol/L

Calcium: 8.5 to 10.5 mg/dL

Chloride: 96 to 106 mmol/L

Magnesium: 1.7 to 2.2 mg/dL

Phosphate: 2.5 to 4.5 mg/dL

Bicarbonate: 22 to 29 mmol/L