A nurse is caring for a postoperative patient who suddenly develops signs of pulmonary embolism. Which nursing action should be the nurse's FIRST priority?

The priority is to address immediate hypoxemia by positioning in high Fowler's and administering oxygen to support oxygenation. Other actions like anticoagulants or diagnostic tests are important but secondary to stabilizing the patient's breathing.

Core Nursing Explanation Key Concept Analysis: This question tests the nurse's ability to prioritize immediate, life-saving interventions in a suspected Pulmonary Embolism (PE). The core principle is the ABC (Airway, Breathing, Circulation) framework. In an emergency, stabilizing the patient's oxygenation and breathing takes precedence over definitive diagnosis or even specific treatment initiation. The patient's symptoms (acute dyspnea, low O2 saturation 88%) and vital signs (tachycardia, tachypnea, hypotension) indicate severe respiratory compromise and potential hemodynamic instability.

Answer Rationale: Key Point! The FIRST priority is always to support the patient's basic physiological needs. High Fowler's position maximizes lung expansion and eases the work of breathing. Administering oxygen is a critical intervention to correct hypoxemia (O2 sat 88%), which is the most immediate threat to organ function and life. This action directly addresses the "B" (Breathing) in the ABCs and can be initiated by the nurse immediately without a physician's order in many protocols for a patient in acute distress.

Distractor Analysis:

1. Administer prescribed anticoagulant: While anticoagulation (e.g., heparin) is the definitive treatment for PE, it is not the first action. The nurse must first ensure the patient is stable enough to receive and metabolize the medication. Administering a drug to a hypoxic, potentially unstable patient is unsafe.
2. Watch out for confusion! Prepare for CT scan / Notify physician and obtain ABG: These are important diagnostic and collaborative steps, but they are secondary to immediate stabilization. You cannot safely transport a hypoxic patient for a scan, and an ABG is a diagnostic tool, not a treatment. The nurse's first role is to intervene to stabilize the patient's condition.

Related Concepts: This scenario highlights nursing clinical judgment in emergency situations. The correct sequence is: 1) Stabilize (ABCs), 2) Notify (rapid response/physician), 3) Prepare for diagnostics/treatment. Understanding the pathophysiology of PE—a clot obstructing pulmonary blood flow, causing V/Q mismatch and hypoxemia—reinforces why oxygenation is the immediate concern. Concept Summary Pulmonary Embolism (PE) Emergency Response: Suspected PE → ABC Assessment → Position & O2 FIRST → Call for Help/Notify → Administer meds (anticoagulants/thrombolytics) per order → Prepare for diagnostics (CTPA, V/Q scan).
Nursing Priorities (ABCs): Airway patency, Breathing/Oxygenation support, Circulation support (IV access, fluids if hypotensive). Side-by-Side Comparison!

Action	Priority Level	Rationale
Position & Administer O2	FIRST / Immediate	Addresses immediate life threat (hypoxemia). Independent nursing action.
Notify Physician / Rapid Response	Second / Concurrent	Initiates collaborative care and orders for definitive treatment.
Administer Anticoagulant (e.g., Heparin)	Third / After Stabilization	Definitive treatment to prevent clot extension. Requires stable patient and physician order.
Prepare for Diagnostic Test (CTPA)	Fourth	Confirms diagnosis. Requires patient to be stable for transport.

Anatomy, Physiology & Pharmacology Points Pathophysiology: A clot (often from DVT) travels to pulmonary arteries → obstructs blood flow → increased pulmonary vascular resistance → V/Q mismatch (ventilation without perfusion) → hypoxemia → right heart strain.
Key Drug (Post-Stabilization): Anticoagulants (Heparin, Enoxaparin) prevent new clot formation. Thrombolytics (Alteplase) may be used for massive PE to dissolve the clot. Monitor for bleeding. Memory Tips PE Priority Mnemonic: "O2 BEFORE YOU DO"
Oxygen & Position FIRST.
Basic vitals & monitor.
Establish IV access.
Follow orders (anticoagulants).
Obtain diagnostics.
Reassure the patient.
Educate on prevention.
You must stabilize first!
Other actions come after.
Understand ABCs are key. High-Frequency NCLEX Topics NCLEX heavily tests prioritization and delegation, especially in emergency scenarios. "FIRST," "PRIORITY," "IMMEDIATE" are key question stems. Mastering the ABC framework is non-negotiable. PE is a classic test case combining post-op complications, respiratory emergencies, and medication administration timing. Watch Out for Question Variations! * Symptom Identification: "Which finding is most suggestive of a pulmonary embolism?" (Answer: Sudden dyspnea, pleuritic chest pain, tachycardia). * Post-Intervention Assessment: "After administering oxygen to a patient with suspected PE, which assessment is most critical?" (Answer: Continuous pulse oximetry and respiratory effort). * Medication Focus: "The nurse is preparing to administer heparin for a PE. Which lab value is essential to check first?" (Answer: aPTT for therapeutic monitoring, but also check Hgb/Hct for baseline bleeding risk). * Prevention: "Which intervention is most important to prevent PE in a post-op patient?" (Answer: Early ambulation and/or prophylactic anticoagulation).

Nursing Clinical Practice Guide Clinical Scenario: You are the nurse on a orthopedic unit. Your patient, Mr. Johnson, 3 days post total hip replacement, calls out anxiously, "Nurse, I can't breathe!" You find him diaphoretic, clutching his chest, with rapid shallow breaths.

Nursing Intervention Strategy: 1. Immediate Assessment & Action (Within seconds): "Mr. Johnson, I'm here to help you." Call for help (hit the nurse call button or yell for assistance). Raise the head of the bed to 90 degrees (High Fowler's). Apply a non-rebreather mask (NRB) at 10-15 L/min to achieve the highest possible FiO2. Do not leave the patient. 2. Focused Assessment (Concurrent): Check pulse ox (it reads 88%). Auscultate lungs (may hear crackles or be clear due to obstruction). Assess for unilateral leg swelling, pain (signs of DVT source). 3. Collaboration & Preparation: When help arrives, one nurse stays with the patient, another notifies the physician/Rapid Response Team, obtains a STAT EKG to rule out MI, and establishes a second IV line for medication access. 4. Ongoing Monitoring & Care: Continuously monitor vital signs, O2 saturation, and level of consciousness. Stay with the patient to provide reassurance and explain procedures. Prepare for transfer to a higher level of care (e.g., ICU).

Patient Safety and Precautions: * Do NOT leave the hypoxic patient alone. * Do NOT lay the patient flat; this worsens dyspnea. * Caution with Oxygen: Use a NRB for severe hypoxemia. In patients with known CO2 retention (e.g., COPD), be prepared to switch to a Venturi mask or lower flow per protocol if ABG results indicate, but in an acute unknown cause, treat hypoxemia first. * Anticoagulant Safety: Before administering heparin/enoxaparin, ensure no active bleeding, check for allergies, and have antidotes available (protamine sulfate for heparin). Nursing Procedure & Medication Flow Emergency Oxygen Administration: 1. Ensure oxygen source is connected and flowing. 2. Select appropriate delivery device: Non-Rebreather Mask (NRB) for severe hypoxemia (O2 sat < 90%). 3. Set flow rate to 10-15 L/min to ensure reservoir bag remains inflated. 4. Place mask securely over nose and mouth. 5. Reassess O2 saturation and respiratory effort within 1-2 minutes.

Anticoagulant Administration (Post-Stabilization): * Heparin IV drip: Requires weight-based dosing and continuous infusion pump. Monitor aPTT (Therapeutic range typically 1.5-2.5 x control) every 6 hours initially. Watch for signs of bleeding (gums, urine, stools, injection sites). * Enoxaparin (Lovenox) SubQ: Given via deep subcutaneous injection in abdomen (avoid 2-inch area around umbilicus). Do not aspirate or massage site. Rotate sites. 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, recognizing subtle changes in a patient's vital signs early can prevent deterioration. When studying for your boards, don't just memorize — connect everything to a real patient situation and always ask 'why?' That mindset will not only earn you a great score on the NCLEX but will make you a truly confident, professional nurse! In this PE scenario, your quick thinking to sit the patient up and give oxygen buys the critical time needed for the team to mobilize and save a life. Never underestimate the power of those fundamental nursing actions."