The nurse includes the problem of “Risk for infection” in the plan of care for a client with myelosuppression. Which laboratory value provides the greatest support for this nursing problem?

Reference Range: Hemoglobin (Hgb) [14 to 18 g/dL (8.69 to 11.17 mmol/L)], Hematocrit (Hct) [42% to 52% (0.42 to 0.52 volume fraction)], Red Blood Cell Count (RBC) [4.2 to 5.4 x 10⁶/µL (4.2 to 5.4 x 10¹²/L)], White Blood Cell (WBC) [5,000 to 10,000/mm³ (5 to 10 x 10⁹/L)].

Choice A reason: Discontinuing the nasal cannula is inappropriate, as 94% SpO₂ indicates mild hypoxemia from pneumonia, requiring oxygen to support alveolar diffusion. The rash likely results from cannula pressure, not oxygen delivery. Padding addresses the rash without compromising respiratory support, ensuring continued therapy.

Choice B reason: Decreasing to 1 L/minute may worsen hypoxemia in pneumonia, where inflamed alveoli impair gas exchange (SpO₂ 94%). The rash is from mechanical irritation, not flow rate. Padding relieves pressure, maintaining oxygen delivery to improve saturation, making flow reduction counterproductive to respiratory needs.

Choice C reason: Applying lubricant reduces friction but not pressure causing the red macular rash from prolonged cannula contact. Lubricants risk aspiration. Padding alleviates pressure points, preventing skin breakdown while maintaining oxygen for pneumonia, addressing the rash’s mechanical cause more effectively than lubrication.

Choice D reason: Placing padding around the cannula tubing relieves pressure on the cheek, preventing skin breakdown from the red macular rash. This maintains oxygen at 3 L/minute, critical for pneumonia’s hypoxemia, where inflamed alveoli reduce oxygen diffusion. Padding ensures skin integrity and respiratory support, addressing both issues effectively.

Choice A reason: Discussing time-checking does not address compulsive lock-checking, likely obsessive-compulsive disorder (OCD), driven by serotonin dysregulation causing intrusive fears. Time management is unrelated to compulsions. Planning activities reduces idle time, distracting from OCD behaviors, addressing the neurobiological basis more effectively.

Choice B reason: Asking why the client checks locks may heighten anxiety in OCD, as compulsions arise from irrational fears, not logic, via cortico-striatal-thalamic dysfunction. This may reinforce obsessions. Activity planning distracts from compulsions, offering a therapeutic approach to improve function, making questioning less effective.

Choice C reason: Planning daily activities structures time, reducing compulsive lock-checking in OCD, where obsessive fears disrupt function. Engaging tasks modulate serotonin, distracting from cortico-striatal overactivity, improving behavioral control. This addresses the disorder’s impact, enhancing functionality by minimizing compulsion opportunities, making it the best action.

Choice D reason: Determining lock type is irrelevant to OCD’s compulsive checking, rooted in neurobiological fear responses, not lock characteristics. This does not address serotonin imbalance. Activity planning redirects focus to structured tasks, reducing compulsions, making lock assessment ineffective for managing the client’s behavior.