The nurse reviews the arterial blood gas results of a client and notes the following:
pH 7.45, [normal range: 7.35-7.45]
Paco2 of 30 mm Hg (30 mmol/L), [normal range: 35-45]
HCO3- of 20 mEq/L (20 mmol/L), [normal range: 22-26]
Which condition would the nurse analyze these results to indicate?
Metabolic alkalosis
Metabolic acidosis
Respiratory alkalosis
Respiratory acidosis
The Correct Answer is C
A. Metabolic alkalosis is characterized by a high pH and a high HCO3- level; this does not match the provided values.
B. Metabolic acidosis would show a low pH and a low HCO3-, which does not match the findings.
C. The pH is high (7.45) while the Paco2 is low (30 mm Hg), indicating respiratory alkalosis. The low HCO3- could be a compensatory mechanism but does not change the primary interpretation of respiratory alkalosis.
D. Respiratory acidosis would be indicated by a low pH and a high Paco2, which is not the case here.
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Correct Answer is B
Explanation
A. Observing for facial symmetry assesses cranial nerves VII (facial nerve) rather than cranial nerve III.
B. Checking the pupillary response to light assesses cranial nerve III (oculomotor nerve), which controls pupil constriction and extraocular eye movements.
C. Testing visual acuity assesses cranial nerve II (optic nerve), not cranial nerve III.
D. Eliciting the gag reflex assesses cranial nerves IX (glossopharyngeal) and X (vagus), not cranial nerve III.
Correct Answer is C
Explanation
A. Response to verbal stimuli does not directly assess the function of cranial nerves III, IV, and VI.
B. Affect, feelings, or emotions are related to the assessment of other neurological functions and do not evaluate the ocular cranial nerves specifically.
C. Eye movements are the primary function of cranial nerves III (oculomotor), IV (trochlear), and VI (abducens), which control eye movement and provide essential information about their function.
D. Insight, judgment, and planning relate more to cognitive function and do not directly assess the function of the cranial nerves in question.