🏥 Patient Presentation

📌 Scenario:
A 54-year-old male is brought into your ER room from triage. He has missed his last two dialysis treatments due to transportation issues.

🚨 Critical Thinking: What are your concerns for a patient who has missed dialysis?
✅ Fluid overload → Why? Without dialysis, excess fluid accumulates in the body, leading to hypertension, pulmonary edema, and increased work of breathing.
✅ Toxin buildup (Uremia) → Why? The kidneys normally filter waste products, and missing dialysis causes toxins like BUN and creatinine to rise, leading to AMS, nausea, and fatigue.
✅ Hyperkalemia → Why? The kidneys play a major role in potassium excretion. When dialysis is missed, potassium levels rise, potentially causing fatal arrhythmias.

👀 Step 1: Initial Impression & Assessment

🩺 Your first observation:

• Increased work of breathing

• Bilateral lower extremity swelling

• Pale skin

• Awake and alert

🔹 What’s your first question?
✅ “What brings you into the ER today?”

📌 Patient response:
➡ “I missed my last two dialysis treatments due to transportation issues. Now I feel tired, my heart feels weird, and I’m short of breath.”

🚨 Decision Point: What are your immediate actions?

✅ Place the patient on the monitor & obtain vital signs.

📌 Why are vital signs crucial in this patient?
➡ BP & HR → High BP and tachycardia may indicate fluid overload or uremia-induced HTN.
➡ SpO₂ & RR → Respiratory distress may indicate pulmonary edema.
➡ Temperature → Infection risk in immunocompromised dialysis patients.

✔ Vitals:

• BP: 235/135 🚨 (Severe Hypertension)

• HR: 121 (Tachycardia)

• RR: 25

• SpO₂: 95% on Room Air

• Temp: 99°F

📟 Step 2: Cardiac Monitoring & ECG

🚨 Critical Thinking: This patient missed dialysis and reports chest discomfort. What should be done within 10-15 minutes?

✅ Answer: Obtain a STAT ECG.

📌 Why is an ECG crucial?
➡ Hyperkalemia can cause life-threatening arrhythmias such as bradycardia, peaked T waves, widened QRS, sine waves, and eventually asystole.

✔ What ECG changes are expected with hyperkalemia?
1️⃣ Peaked T waves (early sign)
2️⃣ Widened QRS (progression towards ventricular instability)
3️⃣ Sine wave pattern (impending cardiac arrest!)

✅ **An ECG is performed and shows peaked T waves & widened QRS → 🚨 Hyperkalemia Concern!

🩸 Step 3: IV Placement & Labs

🚨 Decision Point: Where should you place an IV?
✅ Not on the arm with the dialysis fistula!

📌 Why should IVs not be placed in a dialysis fistula arm?
➡ Fistulas are the patient’s lifeline—puncturing them can cause infection, thrombosis, or loss of function.
➡ Use the opposite arm

✅ IV Access Established → Blood Drawn for Labs

🚨 Knowledge Check: What labs do you expect the provider to order?

✔ Basic Metabolic Panel (BMP) → Check for electrolyte imbalances (potassium, BUN, creatinine).
✔ CBC → Anemia is common in CKD patients.
✔ ABG → Check for metabolic acidosis.
✔ Troponin & BNP → Assess for cardiac ischemia & heart failure.
✔ Coags (PT/INR, PTT) → Assess bleeding risk before dialysis.

✅ Labs result: Potassium = 7.1 🚨 (Critical Hyperkalemia!)

⚡ Step 4: Hyperkalemia Management

🚨 Knowledge Point: Why is a potassium of 7.1 considered critical?
✅ Normal range: 3.5-5.0 mEq/L
✅ Above 6.5 = HIGH risk of fatal arrhythmias
✅ Above 7.0 = IMMEDIATE treatment required!

🚨 Clinical Reasoning Moment: What is the ultimate, most effective treatment for this patient?
✅ Dialysis!
📌 Why? Only dialysis removes excess potassium and corrects fluid overload permanently.

💊 Step 5: Emergency Medications While Awaiting Dialysis

🚨 Knowledge Test: What medications can be given to lower potassium while awaiting dialysis?

✔ 1️⃣ Calcium Gluconate (1g IV over 5-10 min)
🔹 Why? Stabilizes the cardiac membrane to prevent arrhythmias—this is ALWAYS given first in life-threatening hyperkalemia.

✔ 2️⃣ Insulin (10 units IV) + Dextrose (D50 IV push)
🔹 Why? Shifts K⁺ into cells to temporarily lower serum levels. You must check glucose levels prior to insulin administration. If it is less than 200, tell your provider, they may change the insulin dose from 10 to 5. Insulin circulates longer in renal patients, you don't want to cause hypoglycemia.

✔ 3️⃣ Sodium Bicarbonate (50 mEq IV push)
🔹 Why? Helps correct metabolic acidosis and shifts K⁺ into cells.

✔ 4️⃣ Albuterol (High-dose Nebulizer 10-20 mg over 10 min)
🔹 Why? Stimulates beta-agonist effects, shifting K⁺ into cells.

✔ 5️⃣ Lokelma (Sodium Zirconium Cyclosilicate) or Kayexalate
🔹 Why? Binds K⁺ in the gut and excretes it through stool. (Takes hours, so not for immediate life-threatening hyperkalemia!)

✔ 6️⃣ Furosemide (Lasix) 40 mg IV (If patient still makes urine)
🔹 Why? Promotes K⁺ excretion via urine. (Not effective if anuric.)

🚨 Knowledge Test: Which medication should be administered first?
✅ Calcium Gluconate!
📌 Why? It doesn’t lower potassium, but prevents cardiac arrest from hyperkalemia-induced arrhythmias.

💊 Step 6: Blood Pressure Management

🚨 Knowledge Test: What IV medications are used to lower BP in dialysis patients?

✔ Labetalol (10-20 mg IV push, repeat PRN)
🔹 Why? Safely reduces BP without worsening kidney function.

✔ Hydralazine (10-20 mg IV push)
🔹 Why? Vasodilates without reducing perfusion to the kidneys.

📌 Why should ACE inhibitors or diuretics be avoided?
➡ ACE inhibitors (Lisinopril) can further elevate K⁺ levels.
➡ Diuretics (except Lasix) may not be effective if the patient is anuric.

🚨 Step 7: What If Dialysis is Delayed?

📌 What happens if the patient does not get dialysis soon?
➡ Severe hyperkalemia → Arrhythmias → Cardiac Arrest!
➡ Fluid overload → Pulmonary edema → Respiratory failure!
➡ Uremia → Encephalopathy, nausea, metabolic acidosis!

✅ Final Takeaway: Dialysis is the only definitive treatment!

🛑 Final Critical Thinking Questions

🚨 The patient’s potassium is now 7.5. The ECG shows a widening QRS. What are your immediate actions?
🚨 Dialysis is delayed for another 6 hours. How do you manage the patient in the meantime?