PKLI Registered Nurse Pre-Employment Assessment Study Guide

Nursing Practice & Clinical Judgement in Transplant Care

• Post-Renal Transplant Management:
  • Acute Rejection and Infection Assessment:
    • Clinical Manifestations: Post-renal transplant patients presenting with fever ($38.5^\circ\text{C}$), elevated white blood cell count (WBC), flank pain, oliguria (decreased urine output), rapid weight gain, hypertension, edema, and elevated serum creatinine ($> 0.9\,\text{mg/dL}$) show classic signs of acute graft rejection or systemic infection.
    • Priority Nursing Action: Immediately notify the transplant physician/team. Do not delay by simply administering antipyretics or rechecking output hours later.
  • Fluid Balance Monitoring:
    • Daily weight measurement is the single most accurate and essential method to monitor overall fluid balance and early fluid retention in post-kidney transplant patients.
  • Immunosuppressive Therapy Administration & Monitoring:
    • Tacrolimus (Prograf):
      • Monitoring: Therapeutic blood levels must be maintained. A tacrolimus trough level of $17\,\text{ng/mL}$ is elevated and requires immediate physician notification to avoid toxicity.
      • Adverse Effects & Neurotoxicity: Renal transplant recipients developing confusion, tremors, drowsiness, or headaches while receiving tacrolimus (especially with high-dose steroids) must be evaluated for drug-induced neurotoxicity.
      • Patient Teaching: Discharge instruction must emphasize avoiding exposure to crowds and individuals with communicable illnesses due to heightened infection risks.
    • Cyclosporine:
      • Dietary Interactions: Patients receiving cyclosporine must be explicitly instructed to avoid grapefruit juice, as it inhibits CYP3A4 enzyme clearance and leads to toxic drug accumulation.
      • Toxicity Thresholds: A cyclosporine trough level of $400\,\text{ng/mL}$ is significantly elevated (toxic) and requires immediate notification of the healthcare provider.
    • Medication Adherence & Patient Autonomy:
      • If a transplant recipient states an intention to discontinue immunosuppressants (e.g., stating "I feel fine, I don't want to take these anti-rejection drugs anymore"), the nurse's first action is to educate the patient on organ rejection risks and report the refusal directly to the provider. Lifelong adherence to medication is mandatory.
  • Infection Control Precautions:
    • Post-transplant recipients (e.g., $5\,\text{days}$ post-liver transplant) and neutropenic transplant patients require protective isolation with strict hand hygiene, protective masks, and limited visitor policies to prevent opportunistic infections.
    • Hand hygiene is the primary, most effective measure to reduce opportunistic infections in immunocompromised patients.

Critical Care & Management of Hepatic and Renal Pathologies

• End-Stage Liver Disease, Cirrhosis, and Liver Failure:

  • Laboratory Manifestations:
    • Liver dysfunction typically produces marked elevations in serum Alanine Aminotransferase (ALT), Aspartate Aminotransferase (AST), total bilirubin, and International Normalized Ratio (INR) / Prothrombin Time (PT).
  • Coagulopathy & Bleeding Risks:
    • Pathophysiology: Impaired hepatic synthesis of clotting factors combined with splenomegaly-induced thrombocytopenia predisposes patients to severe hemorrhage.
    • Critical Lab Thresholds: Laboratory findings requiring urgent intervention include an INR of $2.5$ or a platelet count of $50,000/\text{mm}^3$ (presenting clinically with petechiae and hematuria).
    • Nursing Interventions: Monitoring for overt and covert signs of bleeding is the highest priority intervention in acute liver failure.
  • Hepatotoxic Medications:
    • Acetaminophen (paracetamol) is directly hepatotoxic and must be strictly limited or avoided in liver impairment.
    • Aminoglycoside antibiotics administered to transplant patients carry high nephrotoxicity risks; serum creatinine and urine output must be closely monitored.
  • Ascites & Fluid Management:
    • Primary Nursing Action: Monitor serial abdominal girth measurements and daily weights.
    • Respiratory Distress Protocol: Severe ascites can displace the diaphragm upward, causing dyspnea. If a patient with hepatic ascites develops shortness of breath, the nurse's priority action is to position the patient upright (High-Fowler's position) and notify the healthcare provider.
  • Hepatic Encephalopathy:
    • Pathophysiology: Elevated blood ammonia levels result from failure of the liver to convert ammonia to urea, causing central nervous system toxicity.
    • Clinical Signs: Confusion, lethargy, somnolence, altered mental status, and asterixis (flapping hand tremor).
    • Priority Nursing Interventions: Check serum ammonia levels, notify the physician immediately, and administer lactulose as prescribed to trap ammonia in the gut and facilitate bowel excretion. High-protein diets must be restricted or managed carefully during acute encephalopathy.
  • Post-Operative Liver Transplant Monitoring:
    • The most concerning postoperative finding within $12\text{--}24\,\text{hours}$ of liver transplantation is active, bright red bleeding from the surgical drain site, or an escalating PT/INR accompanied by deteriorating mental status.

• Chronic Kidney Disease (CKD) & Electrolyte Imbalances:

  • Priority Assessment:
    • Continuous monitoring of serum electrolyte levels (especially potassium, sodium, calcium, phosphate) and renal function parameters (serum creatinine, blood urea nitrogen).
  • Hyperkalemia Management:
    • Normal serum potassium range is $3.5\text{--}5.0\,\text{mmol/L}$.
    • A serum potassium level of $6.4\,\text{mmol/L}$ represents a life-threatening emergency. Priority actions include administering Kayexalate (sodium polystyrene sulfonate) or IV insulin with dextrose as ordered, notifying the physician, and initiating continuous ECG monitoring.
    • Dietary Teaching: CKD patients with hyperkalemia must be instructed to strictly avoid high-potassium foods, including bananas, tomatoes, oranges, and dark green leafy vegetables.

Patient Safety, Infection Control & JCIA Standards

• Fall Prevention Standards:
  • Aligning with JCIA safety goals, fall prevention in transplant and high-risk units requires performing individualized fall risk assessments and implementing standardized environmental protocols (e.g., non-skid footwear/socks, clear walkways, bed alarms, assisted ambulation).
• Informed Consent Requirements:
  • According to JCIA guidelines, informed consent must be a documented, signed discussion between the provider and patient that clearly explains the procedure, risks, benefits, and alternatives, ensuring verifiable patient understanding.
• Medication Safety & Incident Reporting:
  • Near-Miss Events: Any near-miss medication error must be reported using the hospital's official incident reporting system to allow institutional analysis and prevention.
  • Active Practice Errors: If a nurse witnesses a colleague about to administer an incorrect medication or falsifying clinical documentation, the nurse must intervene immediately to prevent patient harm and report the event directly to the nurse manager or supervisor.
• Patient Verification:
  • Before administering any medication or performing procedures, nurses must verify patient identity using at least two unique identifiers (e.g., full name and medical record number/wristband ID).
• Enteral Tube Verification:
  • The JCIA-recommended standard to confirm proper nasogastric (NG) tube position prior to initial use is radiological verification (X-ray).
• Hospital Unit Emergency Protocols:
  • In accordance with R.A.C.E. fire protocols, the immediate first action during a hospital unit fire is to Rescue anyone in immediate danger.

Mathematical Pharmacology & Dosage Calculations

• Basic Unit Conversions:

  • $0.025\,\text{mg} \times 1000 = 25\,\text{mcg}$
  • $\frac{1200\,\text{mcg}}{1000} = 1.2\,\text{mg}$
  • $0.0908\,\text{g} \times 1,000,000 = 90,800\,\text{mcg}$
  • $\frac{3.5\,\text{mg}}{\text{mL}} = \frac{3500\,\text{mcg}}{1000\,\mu\text{L}} = 3.5\,\text{mcg/}\mu\text{L}$

• Weight-Based Daily Dose to Hourly Mass Rate:

  • Prescription: $500\,\text{units/kg/day}$ for a $60\,\text{kg}$ patient.
  • Conversion Factor: $1\,\text{mg} = 1600\,\text{units}$.
  • Total daily dose in units: $500\,\text{units/kg/day} \times 60\,\text{kg} = 30,000\,\text{units/day}$
  • Total daily dose in mg: $\frac{30,000\,\text{units/day}}{1600\,\text{units/mg}} = 18.75\,\text{mg/day}$
  • Hourly infusion rate: $\frac{18.75\,\text{mg/day}}{24\,\text{hr/day}} = 0.78125\,\text{mg/hr}$

• Standard Volume & Dosing Rates:

  • Haemaccel Infusion Rate:
    • Order: $800\,\text{mL}$ IV over $6\,\text{hours}$.
    • Calculation: $\frac{800\,\text{mL}}{6\,\text{hr}} = 133.33\,\text{mL/hr}$
  • Half-Normal Saline Drip Rate:
    • Order: $1000\,\text{mL}$ of $0.45\%$ Normal Saline over $4\,\text{hours}$.
    • Hourly Rate: $\frac{1000\,\text{mL}}{4\,\text{hr}} = 250\,\text{mL/hr}$
    • Drop Rate ($20\,\text{gtts/mL}$ drop factor): $\frac{1000\,\text{mL} \times 20\,\text{gtts/mL}}{240\,\text{min}} = 83.33\,\text{gtts/min}$
  • Heparin Dosage Volume:
    • Order: $15,000\,\text{units}$ SC/IV.
    • Available Stock: $5000\,\text{units}/5\,\text{mL}$ ($1000\,\text{units/mL}$).
    • Calculation: $\frac{15,000\,\text{units}}{1000\,\text{units/mL}} = 15\,\text{mL}$

• Advanced Lidocaine Infusion Calculations:

  • Lidocaine Problem 1 (Fluid Restriction Constraints):

    • Prescription: Refractory ventricular tachycardia. Start lidocaine infusion at $1.5\,\text{mg/min}$, titrate to $3\,\text{mg/min}$ after $15\,\text{minutes}$.
    • Fluid Intake Restriction: Maximum $100\,\text{mL/hr}$ total IV intake.
    • Supplied Concentrate: Lidocaine $2\,\text{g}$ in $5\,\text{mL}$ ($400\,\text{mg/mL}$).
    • Preparation Volume: Added to D5W to make a total infusion volume of $250\,\text{mL}$.
    • Step 1: Calculate maximum hourly mass dose required at maximum rate ($3\,\text{mg/min}$):             $\text{Hourly dose} = 3\,\text{mg/min} \times 60\,\text{min/hr} = 180\,\text{mg/hr}$
    • Step 2: Determine minimum required concentration to ensure $180\,\text{mg/hr}$ is infused within the $100\,\text{mL/hr}$ fluid limit:             $\text{Minimum concentration} = \frac{180\,\text{mg}}{100\,\text{mL}} = 1.8\,\text{mg/mL}$
    • Step 3: Calculate total mass of Lidocaine required in $250\,\text{mL}$ solution:             $\text{Total Lidocaine mass} = 1.8\,\text{mg/mL} \times 250\,\text{mL} = 450\,\text{mg}$
    • Step 4: Calculate minimum volume of $400\,\text{mg/mL}$ stock solution to add:             $\text{Stock volume} = \frac{450\,\text{mg}}{400\,\text{mg/mL}} = 1.125\,\text{mL}$
    • Final Concentration: $1.8\,\text{mg/mL}$

  • Lidocaine Problem 2 (Total Volume Received Over 1 Hour):

    • Clinical Scenario: Ventricular tachycardia protocol for a $70\,\text{kg}$ patient.
    • Stock Available: Lidocaine $2\,\text{g}$ in $500\,\text{mL}$ D5W ($2000\,\text{mg} / 500\,\text{mL} = 4\,\text{mg/mL}$).
    • Dosing Timeline:
      • 1. Bolus: $1\,\text{mg/kg}$ IV stat $\rightarrow 1\,\text{mg/kg} \times 70\,\text{kg} = 70\,\text{mg}$.
      • 2. Continuous infusion (Initial): $3\,\text{mg/min}$ for $20\,\text{minutes} \rightarrow 3\,\text{mg/min} \times 20\,\text{min} = 60\,\text{mg}$.
      • 3. Continuous infusion (Increased): Rate increased to $4\,\text{mg/min}$ for remaining $40\,\text{minutes}$ of hour 1 $\rightarrow 4\,\text{mg/min} \times 40\,\text{min} = 160\,\text{mg}$.
    • Total Lidocaine Mass Administered in 1 Hour:             $\text{Total Mass} = 70\,\text{mg} + 60\,\text{mg} + 160\,\text{mg} = 290\,\text{mg}$
    • Total Volume Received in 1 Hour:             $\text{Total Volume} = \frac{290\,\text{mg}}{4\,\text{mg/mL}} = 72.5\,\text{mL}$

General Clinical Nursing, Critical Care & Pharmacology

• Airway and Suctioning Protocols:
  • Tracheal Suctioning: Pre-oxygenating with $100\%$ oxygen prior to and during suctioning is the essential intervention to prevent procedure-induced hypoxemia.
• Gastrointestinal Emergencies:
  • Peptic Ulcer Disease (PUD): Development of severe hypotension ($\text{BP} = 82/60\,\text{mmHg}$) and tachycardia ($\text{pulse} = 120\,\text{bpm}$) indicates active upper GI bleeding and hypovolemic shock, requiring immediate escalation to the charge nurse/physician.
• Burn Care Protocols:
  • Acticoat Dressings: Silver nitrate antimicrobial dressings applied to full-thickness burns must be re-moistened using sterile water. Using normal saline ($0.9\%\,\text{NaCl}$) precipitates silver chloride, deactivating the antimicrobial properties.
• Pharmacology Warnings:
  • Methotrexate (Rheumatrex): Patients treated with methotrexate for rheumatoid arthritis must strictly avoid taking Aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs). Aspirin reduces renal excretion of methotrexate, causing toxic systemic accumulation.
• Intravenous Fluid Classification:
  • $0.45\%$ Normal Saline ($0.45\%\,\text{NaCl}$) is classified as a hypotonic solution, whereas $0.9\%$ Normal Saline and Lactated Ringer's are isotonic solutions.
• Neurological Assessment:
  • Glasgow Coma Scale (GCS): A clinical assessment tool used specifically to evaluate a patient's level of consciousness across eye, verbal, and motor responses.
• Airway Obstruction:
  • Universal sign of choking: Clutching the throat/neck with both hands.
• Critical Medical Abbreviations:
  • MRSA: Methicillin-Resistant Staphylococcus aureus
  • VAP: Ventilator-Associated Pneumonia

Clinical Case Studies & Short Answer Protocols

• Protocol 1: Mechanical Ventilation in Respiratory Acidosis:

  • Pathophysiology: ABG showing respiratory acidosis (elevated $\text{PaCO}_2$ and low $\text{pH}$) reflects hypoventilation and excessive arterial carbon dioxide retention.
  • Ventilator Parameter Adjustments:
    • To clear excess $\text{CO}_2$, increase Minute Ventilation ($V_E$) by increasing the Respiratory Rate ($RR$) or increasing Tidal Volume ($V_T$) as tolerated by lung mechanics.
    • Adjust Positive End-Expiratory Pressure (PEEP) appropriately to optimize functional residual capacity without exceeding safe peak airway pressures.
  • Patient Monitoring:
    • Obtain a repeat ABG within $15\text{--}30\,\text{minutes}$ following ventilator adjustments.
    • Monitor oxygen saturation ($\text{SpO}_2$), chest wall excursion, and vital signs every $15\,\text{minutes}$.
  • Alarm Troubleshooting:
    • High-Pressure Alarm: Evaluate for patient-ventilator dyssynchrony, tube biting, endotracheal tube occlusion by secretions (requires immediate suctioning), or circuit kinks.
    • Low-Pressure / Low-Volume Alarm: Inspect for circuit disconnection, cuff deflation, or loose fittings.

• Protocol 2: Case Management of Metabolic Acidosis with Severe Hyperkalemia:

  • Patient Diagnostic Profile:
    • Arterial Blood Gas: $\text{pH} = 7.28$ (acidemia), $\text{PaCO}_2 = 35\,\text{mmHg}$ (normal/uncompensated), $\text{HCO}_3^- = 15\,\text{mEq/L}$ (markedly reduced, primary metabolic acidosis).
    • Serum Potassium: $\text{K}^+ = 6.2\,\text{mEq/L}$ (severe hyperkalemia).
  • Pathophysiology of Electrolyte Disturbance:
    • Systemic metabolic acidosis results in excess extracellular hydrogen ions ($\text{H}^+$). To buffer the serum pH, $\text{H}^+$ ions shift into the intracellular space. To preserve electroneutrality, intracellular potassium ($\text{K}^+$) shifts out of cells into the extracellular fluid, resulting in severe hyperkalemia.
  • Priority Nursing Stabilization Actions:
    1. Immediately assess airway, breathing, oxygenation ($\text{SpO}_2$), and vital signs every $15\,\text{minutes}$.
    2. Connect patient to continuous cardiac/ECG monitoring to watch for hyperkalemic changes (peaked T waves, QRS widening, PR prolongation, ventricular dysrhythmias).
    3. Administer IV Calcium Gluconate immediately to antagonize hyperkalemic cardiac membrane excitability.
    4. Administer IV Regular Insulin alongside IV Dextrose ($\text{D}_{50}\text{W}$) to drive extracellular potassium back into cells.
    5. Administer Sodium Bicarbonate IV to buffer metabolic acidosis and facilitate intracellular potassium movement.
    6. Administer Sodium Polystyrene Sulfonate (Kayexalate) or prepare for emergency hemodialysis/diuretic therapy for definitive potassium excretion.
  • Monitoring Effectiveness:
    • Perform continuous ECG monitoring.
    • Recheck serum potassium levels and ABG values regularly until acid-base and electrolyte balance are restored.