Ms. Jackson has been suffering from persistent vomiting for two days. She appears to be lethargic and weak and has myalgia. She is noted to have dry mucous membranes and her capillary refill time takes more than 4 seconds. She is diagnosed with gastroenteritis and dehydration. Measurement of arterial blood gas shows pH 7.5, PaO2 85 mm Hg, PaCO2 40 mm Hg, and HCO3 34 mmol/L. What acid base disorder is shown?
Metabolic Alkalosis, Partially Compensated
Respiratory Acidosis, Partially Compensated
Respiratory Alkalosis, Uncompensated
Metabolic Alkalosis, Uncompensated
The Correct Answer is D
Choice A reason: This choice is incorrect. Partial compensation would typically involve a change in PaCO2 to counterbalance the elevated bicarbonate, which is not observed here.
Choice B reason: This choice is incorrect. Respiratory acidosis is characterized by a low pH and an elevated PaCO2, which is not consistent with the given values.
Choice C reason: This choice is incorrect. Respiratory alkalosis would present with a low PaCO2 due to hyperventilation, which is not the case here.
Choice D reason: This is the correct choice. The elevated pH and HCO3 with a normal PaCO2 indicate metabolic alkalosis without respiratory compensation. Persistent vomiting can lead to loss of stomach acid, which causes metabolic alkalosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: The statement is incorrect because TSH does not attach to a protein in the blood; it stimulates the thyroid gland to produce thyroid hormones.
Choice B reason: This choice is partially correct. TSH does stimulate the thyroid gland, but the main purpose of the test is not to measure the 'feeding' of the gland but to assess its function and how well it's producing thyroid hormones.
Choice C reason: This is the correct statement. TSH levels are measured to determine the thyroid gland's activity, which directly influences the metabolic rate. The normal range for TSH levels in adults is typically 0.4 to 4.0 milliunits per liter (mU/L). However, these values can vary slightly based on the laboratory and the age of the individual.
Choice D reason: While TSH does influence energy levels by regulating thyroid hormone production, this choice does not directly explain the purpose of measuring TSH levels.
Correct Answer is B
Explanation
Choice A reason: An oral temperature of 38.2°C (100.76°F) is slightly elevated but can be expected postoperatively as the body responds to surgical stress. It is not necessarily an indication of a complication unless it rises significantly or is accompanied by other symptoms.
Choice B reason: The output of burgundy colored urine can indicate bleeding in the urinary tract, which is a potential complication after TURP. Normal urine color ranges from pale yellow to deep amber, depending on hydration levels. Burgundy colored urine postTURP could suggest the presence of blood, warranting further assessment and intervention.
Choice C reason: Feeling an urge to void despite having an indwelling urinary catheter can be uncomfortable but is not uncommon after TURP due to irritation of the bladder. It is not typically a sign of a complication unless accompanied by other symptoms such as pain or difficulty urinating once the catheter is removed.
Choice D reason: A pulse rate of 58/min is within the normal resting range for adults, which is typically 60100 beats per minute. A lower than average pulse rate postoperatively might be normal for the patient, especially if they are on medications like betablockers, or it could be a sign of a good fitness level.
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