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Difficulty: HardPharmacological and Parenteral Therapies

During morning interdisciplinary rounds, the healthcare team reviews the treatment plan for a 74-year-old client admitted with a severe systemic infection, chronic kidney disease, and atrial fibrillation. The client is currently receiving a continuous intravenous heparin infusion, intermittent intravenous vancomycin, and a scheduled daily oral dose of digoxin. The morning laboratory report indicates a serum potassium of 3.2 mEq/L (3.2 mmol/L) and a serum creatinine of 2.4 mg/dL (212.2 mcmol/L). Which nursing interventions are appropriate for this client? Select all that apply.

  1. Withhold the scheduled oral digoxin and report the laboratory findings to the prescribing healthcare provider.Answer
  2. Inquire if the client is experiencing any visual disturbances, such as blurred vision or yellow-green halos.Answer
  3. Assess the client's auditory function for new-onset tinnitus or difficulty hearing conversational tones.Answer
  4. D
    Piggyback the vancomycin infusion directly into the continuous heparin tubing at the lowest Y-site.
  5. E
    Delegate the continuous monitoring of the intravenous insertion site for signs of phlebitis to the unlicensed assistive personnel.
  6. F
    Administer the intravenous vancomycin dose over a 30-minute period to rapidly establish therapeutic serum concentrations.

Answer

The correct interventions include withholding the digoxin, assessing for visual disturbances, and monitoring for auditory changes.
The correct actions focus on mitigating identified risks based on the client's clinical and laboratory profile. A potassium level of 3.2 mEq/L indicates hypokalemia, which significantly increases the risk of digoxin toxicity. This risk is further compounded by an elevated creatinine of 2.4 mg/dL, indicating renal impairment that delays the excretion of both digoxin and vancomycin. Therefore, withholding the digoxin, notifying the provider, and assessing for specific toxicity signs (visual disturbances for digoxin, auditory changes for vancomycin) are essential and safe nursing interventions.

Step-by-Step Solution

1
Analyze the client's laboratory values in relation to the prescribed medications.
The potassium level is low (3.2 mEq/L) and the creatinine is elevated (2.4 mg/dL), indicating hypokalemia and renal impairment.
Laboratory values directly impact medication pharmacokinetics, safety profiles, and clearance rates.
2
Evaluate the impact of hypokalemia and renal impairment on digoxin therapy.
Hypokalemia sensitizes the myocardium to digoxin, and renal impairment decreases its excretion, massively increasing the risk of toxicity.
Identifying toxicity risk dictates the immediate need to withhold the dose, notify the provider, and assess for symptoms like visual halos.
3
Evaluate the safety profile of vancomycin in the context of renal impairment.
Elevated creatinine indicates decreased renal clearance, which significantly increases the risk of vancomycin-induced ototoxicity and nephrotoxicity.
This physiological vulnerability requires targeted nursing assessments for hearing loss and tinnitus.
4
Assess the safety of the proposed intravenous administration techniques and delegation actions.
Vancomycin and heparin are physically incompatible, IV assessment cannot be delegated to UAP, and vancomycin must infuse over at least 60 minutes.
Ensuring adherence to fundamental pharmacological safety principles and legal scope of practice regulations prevents direct client harm.

Key Concept

Pharmacological safety principles involving drug toxicity risks, intravenous compatibility, and appropriate delegation.
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Topics

Pharmacological and Parenteral Therapies

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