Hidden Danger: How to Spot Vascular Injuries After Spinal Fusion
"Persistent leg pain after spinal surgery? It could be more than just nerve irritation."
Spinal fusion surgery, especially anterior lumbar surgery (approached from the front), is a common procedure for back pain. While generally safe, it carries rare but serious risks, including vascular injuries. These injuries, affecting blood vessels, can lead to significant complications if not promptly recognized and treated.
One such complication is iliac artery injury, where the main artery supplying blood to the leg is damaged. This can result in blood clots, reduced blood flow, and potentially limb-threatening conditions. The challenge lies in the fact that symptoms can mimic other post-operative issues, like nerve irritation, making diagnosis difficult.
This article will explore a case of iliac artery injury following anterior lumbar surgery, highlighting the importance of vigilance and prompt action when faced with unusual leg pain after spinal procedures. By understanding the risks and recognizing the signs, patients and healthcare providers can work together to ensure the best possible outcomes.
Vascular Complications: Diverse Risks, Limited Figures
Vascular complications can arise directly or indirectly from spine surgery, and every surgical approach carries some risk; the specific complications depend on anatomy, approach, and procedure. Reported problems include laceration, hemorrhage, aneurysm, arteriovenous fistula, thrombosis, and embolization. A 2021 review set out to assess the rate, timing of diagnosis, and repair strategies for injuries in thoracic and lumbar spine surgery, while a separate study described a retrospective chart review of ALIF and OLIF cases from January 2017 through July 2023. The supplied summaries do not provide incidence figures from either study.
Case Study: When Leg Pain Wasn't Just Nerve Pain
In May 2012, a 31-year-old woman experienced persistent left leg pain three weeks after revision lumbar surgery. She had a history of multi-level disc replacement surgery performed eight years prior. The revision surgery, aimed at addressing recurrent low back pain, involved an anterior approach and the insertion of a new cage.
- Initial Misdiagnosis: The patient's pain was initially attributed to nerve root irritation secondary to a dislodged cage.
- Delayed Diagnosis: It took multiple visits to the emergency department and a follow-up with her surgeon before the vascular issue was suspected.
- Critical Clue: Absent pulses in the left leg prompted an urgent computed tomographic angiography, revealing a near-complete occlusion of the left common iliac artery.
How Anterior Approaches Can Injure Vessels
A state-of-the-art review describes several mechanisms of vessel damage during anterior spine surgery: laceration, inadvertent cauterization, tearing during retraction, entrapment in the pathological process, and vessel calcification. It identifies the aorta, segmental arteries, common iliac arteries, middle sacral artery, and renal arteries as vessels that may be affected. A separate article notes that the anterior lumbar approach may be associated with iliac artery thrombosis.
Serious Consequences Across Surgical Approaches
Vascular complications can occur directly or indirectly, and all spine-surgery approaches carry some risk; the types of injury vary with anatomy, approach, and procedure. The reported spectrum includes laceration, hemorrhage, aneurysm, arteriovenous fistula, thrombosis, and embolization. Potential consequences include brisk bleeding that leads to hemorrhagic shock, interrupted blood supply to vital organs such as the spinal cord or brainstem, and secondary injury when bleeding impairs visualization. A source on anterior lumbar exposure also emphasizes that proximity to the vasculature creates risk, while another notes that vascular complications can carry potentially fatal consequences.
A Rabbit Imaging Study of Vascular Territories
A study titled “Delineating the Vascular Territory (Perforasome) of a Perforator in the Lower Extremity of the Rabbit with Four-Dimensional Computed Tomographic Angiography” examined arterial perforator territories in live rabbits. Its conclusion was that four-dimensional computed tomographic angiography could accurately characterize the vascular territory and flow characteristics of an arterial perforator. The supplied source does not compare this imaging method with techniques for detecting vascular injury after spinal fusion.
Protecting Yourself: What You Need to Know
Vascular injuries following anterior lumbar surgery are rare, occurring in approximately 1.9% of cases, with arterial injuries accounting for less than half a percent. However, given the potential for serious complications, it's important to be informed and proactive.
Rare Thoracic Aortic Injury and Prior Surgery
Iatrogenic thoracic aortic injury is described as a rare but recognized complication of spine surgery, and the cited source says standardized treatment guidelines are lacking because cases are rare and manifestations vary. A separate retrospective analysis examined anterior spinal exposures performed by an academic vascular group from October 2020 through October 2022. It used manual chart review and a 2:1 case-control analysis comparing the presence of osteophytes in cases with vessel injury and controls. The supplied summary does not report the study’s findings.
Intraoperative Techniques for Vascular Injury
A 2026 chapter describes compression during an intraoperative vascular injury as a way to maintain blood flow while allowing time for haemostatic preparations. It specifies figure-of-eight full-thickness sutures for arterial injuries and purse-string sutures for venous injuries. For fragile vessels, it describes horizontal mattress sutures with pledgets.
Vasoplegia and Unresolved Treatment Guidance
A study on vasoplegia following complex spine surgery says that further understanding of its pathophysiology, prevention strategies, and ongoing management could potentially prevent avoidable postoperative neurologic injury. It also identifies the potential to reduce intensive-care duration and other serious complications. Separately, a 2025 source describes iatrogenic thoracic aortic injury as rare but recognized and notes the lack of standardized treatment guidelines because of its rarity and variable manifestations.
Case Reports Show the Range of Injury
A retrospective review described seven cases of vascular injury related to posterior lumbar disc surgery treated surgically or endovascularly from January 1997 onward: four lacerations, one arteriovenous fistula, and two pseudoaneurysms. A 2023 report described an inferior vena cava injury during pedicle screw removal and characterized iatrogenic vascular injury as rare but potentially life-threatening. Another source likewise calls thoracic aortic injury a rare but recognized spine-surgery complication and notes that its manifestations vary.
If you experience persistent or unusual leg pain, numbness, or changes in temperature or color in your leg following spinal surgery, seek immediate medical attention. Don't hesitate to question your doctor and advocate for thorough investigation, including vascular studies if warranted.
While post-operative neurological issues often raise suspicion, vascular abnormalities should also be considered. Early detection and treatment are crucial in preventing limb-threatening complications and ensuring a successful recovery.