6.2 Acute Pelvic Hemorrhage Control (Pelvic Binders, Angiography & REBOA)

6.2 Acute Pelvic Hemorrhage Control (Pelvic Binders, Angiography & REBOA)

Exsanguinating retroperitoneal hemorrhage is the leading cause of early death in patients with severe pelvic ring fractures. Because retroperitoneal blood loss can exceed 1 liter per minute in acute arterial or major presacral venous tears, rapid non-invasive stabilization, targeted interventional procedures, and damage-control resuscitation protocols must be initiated immediately upon patient arrival in the resuscitation bay.

Trauma Certified Registered Nurses (TCRNs) play a pivotal role in applying stabilization devices, monitoring end-organ perfusion, assisting with advanced vascular occlusive procedures, and managing massive blood transfusions.

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Anatomical Sources of Pelvic Hemorrhage

Effective hemorrhage control requires understanding the anatomical origin of pelvic bleeding:

• Low-Pressure Presacral Venous Plexus (85–90%): The vast majority of pelvic hemorrhage originates from torn retroperitoneal veins surrounding the sacrum and pelvic walls. This low-pressure bleeding can be successfully tamponaded by mechanically re-approximating bone fragments and reducing internal pelvic volume.
• Internal Iliac Arterial Branches (10–15%): High-pressure arterial tears involve branches of the internal iliac artery (superior gluteal, obturator, internal pudendal, and lateral sacral arteries). Arterial bleeding will not self-tamponade with pelvic binding alone and requires urgent angiographic embolization or surgical intervention.
• Cancellous Bone Surfaces: Raw, fractured surfaces of the pelvic ring continuously bleed until bony stability is restored.

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Non-Invasive Mechanical Stabilization: Pelvic Binder Application

Application of a commercial pelvic binder or pelvic circumferential compression device (PCCD) is a top-priority intervention for any patient with suspected pelvic ring fracture and hemodynamic instability.

Biomechanical Mechanism of Action

Pelvic binders exert circumferential compression across the pelvis, functioning to:

1. Reduce Internal Pelvic Volume: Closing the open-book deformity (APC II/III) reduces retroperitoneal space, facilitating rapid retroperitoneal tamponade.
2. Re-approximate Fractured Bone Surfaces: Reduces bleeding from cancellous bone edges and minimizes movement of sharp bone spicules against adjacent vessels.
3. Stabilize Nascent Clots: Prevents dislodgement of delicate venous and arterial thrombi during patient transfer and transport.

Proper Anatomical Placement

Proper placement technique is critical for clinical efficacy and patient safety:

📍 CRITICAL PLACEMENT LANDMARK: The pelvic binder MUST be centered directly over the GREATER TROCHANTERS of the femurs (the widest part of the hips).

Common Error to Avoid: Placing the binder too high—over the iliac crests or waist/abdomen—is a frequent and dangerous mistake. High binder placement acts as a fulcrum that tilts the iliac wings inward while forcing the ischial tuberosities and pubic symphysis further apart. This worsens pelvic volume expansion and aggravates retroperitoneal bleeding.

       [ ILIAC CRESTS ]  <-- INCORRECT (Too High: Worsens Open-Book Deformity)
             ||
       [ GREATER TROCHANTERS ]  <-- CORRECT ANATOMICAL PLACEMENT LANDMARK
             ||
       [ MID-THIGH ]     <-- INCORRECT (Too Low: Fails to Stabilize Pelvis)

Nursing Care & Management of Pelvic Binders

• Radiographic Verification: Obtain an AP pelvic X-ray immediately after binder placement to confirm adequate anatomical reduction and ensure over-reduction (overlapping pubic bones) has not occurred.
• Skin Integrity & Pressure Injury Prevention: Inspect skin under the binder at least every 2 to 4 hours. Commercial binders exert high shear forces over bony prominences. Binders should be replaced with definitive internal/external fixation within 24 to 48 hours to avoid tissue necrosis.
• Neurovascular Monitoring: Assess distal pedal pulses, capillary refill, skin temperature, motor function, and sensation in both lower extremities continuously.
• Access Requirements: Ensure the binder does not obstruct femoral vascular access sites required for central lines, arterial lines, or REBOA insertion.

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Advanced Interventional & Surgical Hemorrhage Control

When mechanical stabilization with a binder fails to maintain hemodynamic stability, advanced vascular or surgical interventions are indicated.

Resuscitative Endovascular Balloon Occlusion of the Aorta (REBOA)

REBOA is an endovascular technique where a balloon catheter is inserted via the common femoral artery into the aorta and inflated to control sub-diaphragmatic hemorrhage and support central perfusion.

• Zone 1 Occlusion (Thoracic Aorta): Extends from the left subclavian artery origin to the celiac axis (T4–T12). Indicated for severe intra-abdominal hemorrhage or cardiac arrest from sub-diaphragmatic collapse. Inflation time MUST be limited to < 30 minutes to prevent severe mesenterico-renal ischemia.
• Zone 3 Occlusion (Infrarenal Aorta): Extends from the lowest renal artery to the aortic bifurcation (L2–L5). Indicated specifically for severe pelvic hemorrhage and junctional groin trauma without intra-abdominal bleeding. Inflation time is limited to < 60 minutes.
• Zone 2 (Pararenal Aorta, T12–L2): Strictly avoided / Prohibited zone due to high risk of renal and visceral artery occlusion.

+-----------------------------------------------------------------------+
|                       AORTIC REBOA ZONES                              |
+-----------------------------------------------------------------------+
| Zone 1: Subclavian Artery to Celiac Artery (T4-T12)                   |
|   -> Indication: Severe Abdominal Bleeding / Cardiac Arrest           |
|   -> Max Inflation: < 30 Minutes                                      |
+-----------------------------------------------------------------------+
| Zone 2: Celiac Artery to Lowest Renal Artery (T12-L2)                 |
|   -> NO GO ZONE / PROHIBITED (Renal & Visceral Risk)                  |
+-----------------------------------------------------------------------+
| Zone 3: Lowest Renal Artery to Aortic Bifurcation (L2-L5)             |
|   -> Indication: Severe Isolated Pelvic / Junctional Hemorrhage       |
|   -> Max Inflation: < 60 Minutes                                      |
+-----------------------------------------------------------------------+

⚠️ REBOA DEFLATION SAFETY WARNING: Balloon deflation causes an abrupt release of accumulated anaerobic metabolites (lactic acid, potassium, inflammatory cytokines) into systemic circulation. Deflation MUST be performed slowly in an OR or ICU setting with ready access to vasopressors, calcium chloride, sodium bicarbonate, and fluid resuscitation to manage severe reperfusion shock and fatal hyperkalemia.

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Hemodynamic Resuscitation Strategies

1. Damage Control Resuscitation & Massive Transfusion Protocol (MTP): Initiate MTP immediately upon recognizing severe pelvic bleeding. Administer Packed Red Blood Cells (PRBCs), Fresh Frozen Plasma (FFP), and Platelets in a balanced 1:1:1 ratio to mimic whole blood and prevent dilution of clotting factors.
2. Permissive Hypotension: Maintain target Mean Arterial Pressure (MAP) of 50–60 mmHg or Systolic Blood Pressure (SBP) of 80–90 mmHg until surgical or endovascular hemostasis is achieved. Excessive fluid administration spikes hydrostatic pressure and dislodges soft retroperitoneal blood clots ("popping the clot").
3. Prevention of Trauma Triad of Death:
   • Hypothermia: Use blood warmers for all fluids, forced-air warming blankets, and elevated ambient room temperatures.
   • Coagulopathy: Administer Tranexamic Acid (TXA) 1 g IV over 10 minutes within 3 hours of injury, followed by 1 g IV infusion over 8 hours. Monitor ionized calcium levels (keep > 1.1 mmol/L) to treat citrate toxicity from banked blood.
   • Acidosis: Maintain adequate tissue perfusion and target serum lactate < 2.0 mmol/L and base excess within -2 to +2 mEq/L.