Nursing Clinical Practice Guide
Clinical Scenario
You are the nurse caring for Mr. Johnson, a 68-year-old in the ICU with sepsis-induced Acute Kidney Injury (AKI). He is on day 2 of Continuous Venovenous Hemodiafiltration (CVVHDF), a type of CRRT. His pre-treatment weight was 92 kg, and the goal is to remove 2 L of fluid over 12 hours. Midway through the treatment, he becomes agitated, points to his chest, and says, "I can't breathe... it hurts."
Nursing Intervention Strategy
1. Immediate Assessment & Action (ABCs):
* Stop the CRRT pump immediately. This is the first and most critical step to prevent further potential insult.
* Clamp the bloodlines going to and from the patient.
* Assess: Airway patency, respiratory rate/effort, oxygen saturation, heart rate/rhythm, blood pressure. Auscultate heart and lungs.
* Call for help and activate the rapid response team if indicated. Inform the nephrology fellow and attending physician stat.
* Positioning: If air embolism is suspected (e.g., you saw air in the line), place the patient in Trendelenburg (head down) and left lateral decubitus position. This traps air in the right ventricle, preventing it from entering the pulmonary artery.
* Administer high-flow oxygen via non-rebreather mask.
2. Secondary Assessment & Support:
* Obtain a STAT 12-lead ECG to rule out myocardial infarction.
* Draw labs per protocol (cardiac enzymes, electrolytes, blood gas).
* Ensure IV access is patent for emergency medications.
* Provide reassurance to the anxious patient.
3. Evaluation & Documentation:
* Continuously monitor vital signs and response to interventions.
* Document everything meticulously: time of symptom onset, your assessments, all actions taken (including who was notified), and the patient's response.
Patient Safety and Precautions
* Circuit Checks: Always perform pre-treatment checks of the entire CRRT circuit for tight connections and absence of air. Use air bubble detectors (they should be on and functional).
* Anticoagulation: If the patient is on citrate or heparin anticoagulation for the circuit, be aware of the systemic effects and monitor for bleeding (e.g., check access site, gums, stool).
* Fluid Balance: Meticulously track intake/output and hourly net fluid removal. Rapid ultrafiltration can lead to hypotension and cramping.
Nursing Procedure & Medication Flow
Responding to Suspected Air Embolism during CRRT:
1. STOP the blood pump.
2. CLAMP the arterial and venous bloodlines immediately.
3. POSITION patient: Trendelenburg and left lateral decubitus.
4. ADMINISTER 100% oxygen.
5. NOTIFY physician and charge nurse/RRT.
6. MONITOR vital signs, neurological status, prepare for possible advanced cardiac life support (ACLS).
7. DO NOT restart therapy until the cause is identified and resolved.
A Word from Your Senior Nurse
"Nursing is not just about carrying out physician orders — it's about being the frontline guardian for your patients! In clinical practice, a machine alarm is one thing, but a patient's words — 'I can't breathe' — are the most critical alarm of all. Your knowledge of pathophysiology (why chest pain happens post-dialysis) combined with sharp assessment skills and calm, rapid intervention can save a life. When studying for your boards, don't just memorize lists of complications. Visualize the scenario, feel the urgency, and practice your mental 'first steps.' That mindset will not only earn you a great score on the NCLEX but will make you a truly confident, professional nurse who patients can trust in their most vulnerable moments!"