Trunk vessels (aorta, vena cava, abdominal branches)
Iliolumbar veins
Vena iliolumbalis (dextra et sinistra)
- Origin
- Arise in the iliac fossa from the iliopsoas and quadratus lumborum muscles
- Insertion
- Drain into the internal iliac or common iliac vein, communicating with the ascending lumbar vein
- Function
- Drains the iliopsoas, iliac crest, and fifth lumbar spinal region
- Innervation
- Sympathetic vasomotor fibers
- Movement & chain
- Venous return to iliac system
- Palpation
- Not palpated directly
- Clinical
- High-risk vessel during anterior lumbar spine exposure (ALIF at L5-S1); avulsion causes rapid, severe retroperitoneal venous hemorrhage.
- Segmental innervation
- L4-S1 spinal levels
- In clinical practice
- Surgical mobilization and secure ligation during anterior spinal exposures (ALIF)
- Region in the model
- Trunk vessels (aorta, vena cava, abdominal branches)