Pulmonary Embolism (PE) Nursing Guide 2026
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Recognition, risk stratification, treatment, and nursing management of pulmonary embolism from suspected PE to therapeutic anticoagulation.
1. Pathophysiology in 60 Seconds
A thrombus (usually from DVT in the legs or pelvis) travels to the pulmonary vasculature and obstructs blood flow. This causes: ventilation-perfusion (V/Q) mismatch → hypoxemia; increased right ventricular (RV) afterload → RV strain → RV failure → decreased cardiac output → shock.
The severity depends on how much of the pulmonary vasculature is obstructed and the patient's cardiopulmonary reserve.
2. DVT/PE Risk Factors: Virchow's Triad
- Stasis: Immobility, long-haul travel (>4 hr), heart failure, A-Fib, paralysis, post-op bed rest
- Hypercoagulability: Cancer (Trousseau's syndrome), Factor V Leiden, antiphospholipid syndrome, pregnancy/OCP/HRT, protein C/S deficiency, JAK2 mutation, dehydration
- Endothelial damage: Surgery, trauma, central venous catheters, atherosclerosis
3. Clinical Presentation
| Classic Triad (rare — only 20%) | Common Symptoms (individually nonspecific) |
|---|
| Hemoptysis | Sudden-onset dyspnea (most common) |
| Chest pain (pleuritic — worse with inspiration) | Tachycardia (HR >100 is most sensitive sign) |
| Dyspnea | Tachypnea (RR >20) |
Other: anxiety/sense of doom, cough, low-grade fever, syncope or presyncope, hypotension (massive PE), new right heart strain on EKG (S1Q3T3 pattern — specific but insensitive)
PE can present insidiously: Unexplained tachycardia alone should prompt PE workup in the right clinical context. Many PEs are diagnosed incidentally on CT done for another reason.
4. EKG Findings in PE
| Finding | Meaning |
|---|
| Sinus tachycardia | Most common — nonspecific |
| S1Q3T3 | Deep S in I, Q wave in III, inverted T in III → right heart strain |
| New right bundle branch block (RBBB) | RV strain/dilation |
| T-wave inversions V1–V4 | RV strain pattern |
| New A-Fib | RV pressure elevation triggering dysrhythmia |
5. Diagnostic Workup
Wells PE Criteria (Pre-test Probability)
| Clinical Feature | Points |
|---|
| Clinical signs/symptoms of DVT | +3 |
| PE is #1 diagnosis OR equally likely | +3 |
| Heart rate >100 | +1.5 |
| Immobilization ≥3 days OR surgery in last 4 weeks | +1.5 |
| Previous DVT/PE | +1.5 |
| Hemoptysis | +1 |
| Malignancy (on treatment or within 6 months) | +1 |
Scoring: ≤4 = PE unlikely (use D-dimer to rule out) | >4 = PE likely (go directly to CT-PA)
Diagnostic Tests
| Test | Use | Pearls |
|---|
| D-dimer | Rule OUT PE in low/intermediate probability | High sensitivity (~95%), low specificity — elevated in: infection, pregnancy, cancer, surgery, age >50 (age-adjusted cutoff = age × 10 mcg/L). NEVER use to rule IN PE. |
| CT Pulmonary Angiography (CT-PA) | Gold standard for PE diagnosis | Visualizes thrombus in pulmonary arteries; also detects RV/LV ratio for severity; requires IV contrast and adequate renal function |
| V/Q Scan | Alternative when CT-PA contraindicated (allergy, AKI, pregnancy) | Results: normal (rules out PE), high probability, or indeterminate |
| Echocardiography | Assess RV function in hemodynamically unstable patient (bedside ECHO) | McConnell sign: RV free wall hypokinesis with preserved apical motion (specific for PE) |
| Lower extremity duplex ultrasound | Find DVT source | If positive, confirms VTE — may spare CT-PA exposure; negative does not rule out PE |
| Troponin, BNP/NT-proBNP | Risk stratification | Elevated = myocardial injury from RV strain → higher mortality risk |
6. PE Classification & Risk Stratification
| Category | Hemodynamics | RV Dysfunction | Biomarkers | Mortality | Treatment |
|---|
| Low Risk | Stable | No | Normal | <1% | Anticoagulation; consider outpatient |
| Submassive (Intermediate) | Stable (SBP ≥90) | Yes (echo or CT) | Elevated troponin or BNP | 3–15% | Anticoagulation + monitor; consider thrombolytics or catheter-directed therapy |
| Massive | SBP <90, shock, cardiac arrest | Yes (severe) | Elevated | >25–30% | Systemic thrombolytics (alteplase) if no contraindications; surgical embolectomy if contra to lytics |
PESI Score: Pulmonary Embolism Severity Index. Used for low-risk PE to identify patients safe for outpatient treatment. Variables include age, sex, cancer, chronic cardiopulmonary disease, HR, BP, RR, temp, mental status, O2 sat.
7. Treatment
Anticoagulation (Primary Treatment)
- Hemodynamically stable: Start anticoagulation immediately once PE confirmed (or even before if clinical suspicion is high and bleeding risk is low). Options: rivaroxaban (preferred DOAC — no parenteral bridge needed), apixaban, or UFH/LMWH → warfarin.
- Duration: Provoked PE (surgery/immobility) = 3 months. Unprovoked PE = minimum 3 months, consider indefinite. Cancer-associated = indefinite (LMWH preferred, or DOAC).
Systemic Thrombolytics (Massive PE / Cardiac Arrest)
Alteplase (tPA) for massive PE:
- Dose: 100 mg IV over 2 hours (or 0.6 mg/kg over 15 min in cardiac arrest, max 50 mg)
- Stop anticoagulation during infusion; restart when aPTT <80 sec after tPA
- Contraindications: Recent brain surgery/head trauma, intracranial neoplasm, active internal bleeding, recent (2–3 months) ischemic stroke, known bleeding diathesis
- After tPA: Monitor closely for ICH (neuro checks), groin site bleeding, all puncture sites
Catheter-Directed Thrombolysis (CDT) / PERT
Pulmonary Embolism Response Team (PERT) — multidisciplinary team (pulmonology, hematology, IR, cardiac surgery, cardiology) activates for intermediate-high to massive PE. CDT delivers low-dose tPA directly into the clot via catheter — lower systemic bleeding risk than full-dose systemic lytics.
IVC Filter
Indicated when: anticoagulation is absolutely contraindicated AND patient has confirmed DVT/PE, or recurrent PE despite therapeutic anticoagulation. Retrievable filters preferred — retrieve when anticoagulation can be resumed. NOT a substitute for anticoagulation.
Surgical Embolectomy
Last resort for massive PE when: thrombolytics contraindicated or failed, catheter-directed therapy not available, patient in cardiac arrest. High mortality — only performed at specialized centers.
8. Nursing Management: PE Care
Immediate Priorities
- Airway/Breathing: Supplemental oxygen (goal SpO2 ≥95%; avoid hyperoxia). Prepare for intubation if respiratory failure (caution: positive pressure can worsen RV failure by increasing RV afterload).
- Circulation: IV access × 2. Hemodynamic monitoring. Vasopressors for hypotension: norepinephrine is first-line (supports RV perfusion pressure).
- Anticoagulation: Confirm no absolute contraindications → start immediately.
- Position: HOB elevated 30–45°. Avoid Valsalva (increases intrathoracic pressure → decreases RV preload).
- Activity: Bed rest × 24–48 hr for confirmed DVT/PE — ambulate once therapeutic anticoagulation is established.
Ongoing Monitoring
| Parameter | Frequency | What to Watch |
|---|
| Vitals + SpO2 | q1–4h (q15 min if unstable) | Worsening hypoxia, tachycardia, hypotension → deterioration |
| Neuro assessment | q4h (q1h if on thrombolytics) | New confusion, headache, focal deficit → ICH |
| Anticoagulation labs | Per protocol | UFH: aPTT q6h until stable; warfarin: daily INR; DOACs: no routine labs |
| Bleeding assessment | q shift | All puncture sites, urine color, stool guaiac, epistaxis |
| RV function | Serial EKGs, repeat ECHO if changing | New RBBB, RV strain pattern worsening |
| Extremities | q shift | DVT signs: calf tenderness, swelling, Homan's sign (unreliable but still assessed) |
Patient Education Before Discharge
- Take anticoagulation exactly as prescribed — missing doses increases re-clot risk
- Signs of bleeding to report: unusual bruising, blood in urine/stool, prolonged bleeding from cuts, severe headache
- Avoid contact sports, activities with injury risk while on anticoagulation
- Warfarin patients: consistent vitamin K intake; carry Medic-Alert bracelet; drug/food interaction list
- DOAC patients: keep taking with or without food as directed; do not stop without calling provider
- Return to ED immediately: sudden worsening shortness of breath, chest pain, syncope, new leg swelling
- Complete full duration of anticoagulation — discuss stopping date with provider
9. DVT Prevention (Primary Prevention)
DVT Prophylaxis Bundle:
- Pharmacologic: enoxaparin 40 mg SQ daily or UFH 5,000 units SQ q8–12h (hold if platelets <50k, active bleeding, recent neurosurgery)
- Mechanical: Sequential compression devices (SCDs) — apply before surgery; keep on whenever in bed; ensure skin assessment underneath daily
- Ambulation: Early and frequent ambulation post-op
- Adequate hydration
- Avoid prolonged IV catheter inactivity
NCLEX High-Yield PE Points
- PE classic triad: dyspnea + chest pain + hemoptysis (only 20% have all three)
- Most common sign: tachycardia; most common symptom: sudden dyspnea
- Gold standard diagnosis: CT pulmonary angiography (CT-PA)
- D-dimer: use to rule OUT PE in low probability — high sensitivity, low specificity
- Massive PE = hypotension (SBP <90) → systemic thrombolytics (alteplase) if no contraindications
- Anticoagulation is the primary treatment for PE; thrombolytics reserved for massive PE only
- IVC filter = when anticoagulation is contraindicated + confirmed DVT/PE
- After alteplase: q1h neuro checks × 24h; restart heparin when aPTT <80 sec
- Position patient with PE: HOB 30–45 degrees; supplemental oxygen; monitor SpO2
- DVT prophylaxis: SCDs + pharmacologic (enoxaparin or UFH) for high-risk surgical patients
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