Prehospital Academy Lesson 35.1
Trauma: Abdominal and Genitourinary Injuries Overview
This lesson provides an overview of abdominal and genitourinary (GU) injuries for EMTs. Trauma to these regions can be complex and life-threatening due to the presence of numerous vital organs, many of which are highly vascular or contain corrosive contents. Rapid and accurate assessment, combined with appropriate prehospital management, is essential to minimize morbidity and mortality.
Anatomy of the Abdomen and Genitourinary System
Understanding the anatomy helps in predicting potential injuries based on the mechanism of trauma.
Abdominal Quadrants:
The abdomen is often divided into four quadrants for assessment purposes:
Right Upper Quadrant (RUQ): Liver (large lobe), gallbladder, a portion of the pancreas, part of the small and large intestines.
Left Upper Quadrant (LUQ): Liver (small lobe), spleen, stomach, majority of the pancreas, large and small intestines.
Right Lower Quadrant (RLQ): Part of the large and small intestines, appendix, right ureter, right ovary/fallopian tube (females).
Left Lower Quadrant (LLQ): Part of the large and small intestines, left ureter, left ovary/fallopian tube (females).
Types of Organs:
Solid Organs: Liver, spleen, pancreas, kidneys. Highly vascular and prone to significant hemorrhage when injured.
Hollow Organs: Stomach, intestines, bladder, ureters. When injured, they can spill their contents (digestive enzymes, urine) into the abdominal cavity, leading to peritonitis and infection.
Genitourinary System:
Kidneys: Located in the retroperitoneal space (posterior to the abdominal cavity), protected by the lower ribs. Responsible for filtering blood and producing urine.
Ureters: Tubes connecting the kidneys to the bladder.
Bladder: Stores urine.
Genitalia: External reproductive organs.
Mechanisms and Types of Injuries
Blunt Abdominal Trauma:
Often caused by motor vehicle collisions (MVCs), falls, or direct blows. Injuries can be harder to detect externally.
Deceleration Injuries: Organs tear away from their attachments (e.g., liver or spleen lacerations in MVCs).
Compression Injuries: Organs crushed between the object and the spinal column (e.g., seatbelt injuries causing bowel rupture).
Solid Organ Lacerations/Ruptures: Liver and spleen are commonly injured, leading to massive internal bleeding.
Hollow Organ Perforation: Stomach, small bowel, or large bowel ruptures, spilling contents.
Penetrating Abdominal Trauma:
Caused by stabbings, gunshot wounds, or impalement. The trajectory of the object determines the extent of injury.
Direct injury to any abdominal organ.
Evisceration (protrusion of organs outside the body).
Genitourinary Injuries:
Kidney Injuries: Blunt trauma (e.g., direct impact to flank), often associated with rib fractures. Can cause hematuria (blood in urine).
Bladder Injuries: Blunt trauma to a full bladder (e.g., pelvic fractures) can cause rupture.
External Genitalia Injuries: Can involve lacerations, contusions, avulsions.
Signs and Symptoms of Abdominal/GU Injuries
Pain: Localized, diffuse, or referred pain (e.g., shoulder pain with splenic injury).
Tenderness/Guarding: Involuntary muscle spasm protecting the injured area.
Distention/Rigidity: Abdominal swelling or hardness.
Ecchymosis: Bruising (e.g., Cullen's sign - periumbilical, Grey Turner's sign - flank).
Signs of Hemorrhage/Shock: Pallor, tachycardia, hypotension, altered mental status.
Nausea/Vomiting.
Hematuria: Blood in the urine (suggests kidney or bladder injury).
Evisceration: Protrusion of organs.
Crepitus: With pelvic fractures.
Prehospital Care for Abdominal/GU Injuries
Focus on ABCs, managing shock, and rapid transport to a trauma center.
Scene Safety: Ensure safety for providers and patient.
Primary Assessment (ABCs):
Airway: Ensure patency, be prepared to manage vomitus.
Breathing: Administer high-flow oxygen. Monitor for adequate ventilation.
Circulation: Control external bleeding. Address hypovolemic shock aggressively with fluid resuscitation (advanced providers) per protocol.
Spinal Immobilization: If mechanism suggests, stabilize the spine.
Position of Comfort: If no spinal injury, position patient with knees flexed to reduce abdominal tension.
Management of Specific Injuries:
Evisceration: Cover exposed organs with a moist, sterile dressing and then with an occlusive dressing. Do NOT attempt to push organs back in.
Impaled Objects: Stabilize in place; do NOT remove.
Genital Trauma: Control bleeding, apply sterile dressings.
Monitor & Reassess: Continuously monitor vital signs and patient condition for signs of worsening shock.
Rapid Transport: Transport to the nearest appropriate trauma center.
Critical Thinking Questions
You are assessing a patient with a stab wound to the RUQ. What organs are at highest risk of injury, and what complications might arise from injury to these organs?
A patient involved in a high-speed MVC presents with abdominal rigidity, tenderness, and signs of shock, but no obvious external injuries. What type of injury do you suspect, and what is the primary concern?
Describe the proper prehospital management for a patient with an evisceration following an abdominal injury.
Why is it crucial to treat hypovolemic shock aggressively in patients with suspected abdominal trauma?
A patient with a suspected pelvic fracture complains of an inability to urinate and discomfort in the suprapubic region. What genitourinary injury might you suspect, and why?