Reference — Med-Surg
Aortic Emergencies Reference
The classification and numbers behind aortic disease: where a dissection sits (Stanford A vs B drives surgery-vs-medical), when an aneurysm gets screened and repaired, and the two ways to fix it.
Educational use only. Classification thresholds and repair decisions are provider-directed and individualized. This reference is an educational aid. This material supports nursing education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional policy, or medical direction. Always follow facility protocols and current provider orders.
Dissection — Stanford Classification
| Type | Location | Management |
|---|---|---|
| Stanford A | Involves the ASCENDING aorta (± descending) | Surgical EMERGENCY (risk of tamponade, aortic regurgitation, coronary/cerebral compromise) |
| Stanford B | Involves the DESCENDING aorta only (distal to the left subclavian) | Usually MEDICAL management (aggressive HR/BP control); surgery/TEVAR for complications |
The older DeBakey system: I = ascending + descending, II = ascending only, III = descending only. Memory aid: A = Ascending = Acute surgery; B = Beta-blockers/medical.
Abdominal Aortic Aneurysm — Screening & Repair
Screening: a one-time ultrasound is commonly recommended for men 65–75 who have ever smoked.
Surveillance vs repair: small aneurysms are monitored with serial imaging; elective repair is generally considered at ~5.5 cm (AAA), with rapid growth, or when symptomatic. A ruptured or symptomatic aneurysm is an emergency regardless of size.
Repair Options
| Option | Detail |
|---|---|
| EVAR / TEVAR (endovascular) | Stent-graft via catheter (femoral). Less invasive, faster recovery; needs lifelong surveillance imaging for endoleaks |
| Open surgical repair | Graft via laparotomy/thoracotomy. More durable but higher operative risk and longer recovery |
NCLEX Pearls
- ✦Stanford A = ascending = surgical emergency; Stanford B = descending = often medical (A = Acute surgery, B = Beta-blockers).
- ✦DeBakey I = ascending+descending, II = ascending only, III = descending only.
- ✦AAA screening: one-time ultrasound for men 65–75 who ever smoked.
- ✦Elective AAA repair generally at ~5.5 cm, rapid growth, or symptoms; rupture/symptoms = emergency at any size.
- ✦EVAR/TEVAR is less invasive but needs lifelong surveillance imaging for endoleaks.
Related Resources
Standards & sources
Fact-checked Jun 21, 2026This page is written to align with Academy of Medical-Surgical Nurses (AMSN) · Current medical-surgical nursing standards. It is an educational summary, not a citation of any single document — always verify specific doses, values, and protocols against current guidelines and your facility policy. How we source content →