Evaluation of Vascular Running Using Preoperative Contrast-Enhanced Computed Tomography in Lumbar Lateral Interbody Fusion

DOI

Bibliographic Information

Other Title
  • 腰椎側方椎体間固定術の術前造影CTを用いた血管走行の評価―術中注意すべき所見の検討―

Abstract

<p>Introduction: Lateral intervertebral fusion of the lumbar spine is associated with the risk of injury to large blood vessels, their branches, and venous malformations.</p><p>Objective: To evaluate the anatomy that poses a risk of vascular injury in lateral intervertebral fusion using preoperative contrast-enhanced computed tomography (CT).</p><p>Materials: Forty-six patients who underwent contrast-enhanced CT prior to lateral intervertebral fusion at our institution were included, and major arteries and veins were evaluated on horizontal section images at each vertebra from L1/2-L4/5. The presence or absence of lumbar artery branches running longitudinally across the intervertebral disk was evaluated in each vertebral segment. Venous malformations were evaluated for (a) duplicated vena cava, (b) running of the left common iliac vein branch outside the common iliac artery, and (c) dilatation of the ovarian vein or spermatic cord vein.</p><p>Results: Major arteries traveling in Zones 1-4 according to Moro et al.'s evaluation method were found in 5 cases (11%) in L1/2, 3 cases (7%) in L2/3, 2 cases (4%) in L3/4, and 5 cases (11%) in L4/5. Major veins were found in 6 cases (13%) in L1/2, 16 cases (35%) in L2/3, 37 (80%) in L3, 37 (80%) in L1/2, 16 (35%) in L2/3, 39 (85%) in L3/4, and 39 (85%) in L4/5. Longitudinal disk traversal of the lumbar artery branch was present in 1 case (2%) in L3/4 and 15 (33%) in L4/5. Venous malformations were found in (a) 0 (0%), (b) 4 (9%), and (c) 3 (7%) patients, respectively.</p><p>Conclusions: Major arteries and veins may be present within the operative range at any elevation from L1/2 to L4/5, and segmental arteries may traverse near the intervertebral disk at L3/4 and L4/5. Venous malformations should also be assessed preoperatively.</p>

Journal

  • Journal of Spine Research

    Journal of Spine Research 15 (1), 28-33, 2024-01-20

    The Japanese Society for Spine Surgery and Related Research

Details 詳細情報について

  • CRID
    1390861847633949440
  • DOI
    10.34371/jspineres.2022-0042
  • ISSN
    24351563
    18847137
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Disallowed

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