The nurse reviews the arterial blood gas results of an assigned client and notes the laboratory report results
pH of 7.30, [normal pH is 7.35 to 7.45]
Paco2 of 58 mm Hg, [Normal Paco2 is 35 to 45 mm Hg]
Pao2 of 80 mm Hg. [normal is 80-100]
HCO3 of 27 mEq/L (27 mmol/L). [Normal HCO3 is 22-26]
The nurse interprets that the client has which acid-base disturbance?
Respiratory acidosis
Respiratory alkalosis
Metabolic acidosis
Metabolic alkalosis
The Correct Answer is A
A. Respiratory acidosis: The pH is low (indicating acidosis), and the Paco₂ is elevated, which signifies that carbon dioxide retention is causing the acidosis. This pattern indicates respiratory acidosis, as the elevated HCO₃ suggests a compensatory response.
B. Respiratory alkalosis: Respiratory alkalosis would show a high pH with a low Paco₂. This is not consistent with the client’s lab results.
C. Metabolic acidosis: Metabolic acidosis would show a low pH with a low HCO₃. In this case, the HCO₃ is slightly elevated, ruling out metabolic acidosis.
D. Metabolic alkalosis: Metabolic alkalosis would show a high pH with an elevated HCO₃, which does not match the client’s results.
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Correct Answer is C
Explanation
A. Heroin use is generally associated with intravenous use and is less commonly linked to nasal septum perforation.
B. Ecstasy (MDMA) is primarily used in tablet form and is not typically associated with nasal use that would cause septal perforation.
C. Cocaine is frequently snorted, which can lead to irritation and damage to the nasal passages and septum, resulting in perforation.
D. Marijuana is usually smoked rather than snorted, and it is not commonly associated with nasal septum perforation.
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.