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Determining variations in colonic circulation during aortic surgery

Y Inoue1, T Iwai, M Endo

  • 1Department of Surgery, School of Medicine, Tokyo Medical and Dental University, Japan.

Cardiovascular Surgery (London, England)
|January 10, 1998
PubMed
Summary
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Transanal Doppler and stump pressure measurements effectively assess collateral circulation to the inferior mesenteric artery bed during abdominal aortic surgery, aiding in predicting colonic viability.

Area of Science:

  • Vascular Surgery
  • Gastrointestinal Surgery
  • Diagnostic Imaging

Background:

  • Assessing collateral circulation to the inferior mesenteric artery (IMA) bed is crucial during abdominal aortic surgery to ensure adequate blood supply to the colon.
  • Failure to maintain colonic perfusion can lead to ischemic complications.

Purpose of the Study:

  • To compare the efficacy of transanal Doppler examination, intraoperative angiography, and IMA stump pressure measurement in evaluating collateral flow to the IMA bed.
  • To determine the dominant arterial source supplying the IMA territory.

Main Methods:

  • Transanal Doppler examination was performed to assess collateral pathways.
  • Intraoperative angiography via the IMA was utilized to visualize the mesenteric artery.
  • IMA stump pressure index was measured to quantify collateral circulation.

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Main Results:

  • Transanal Doppler identified superior mesenteric artery (SMA) dominance in 25 patients, IMA dominance in 2, and internal iliac artery dominance in 1.
  • The mean IMA stump pressure index was significantly higher in the SMA-dominant group (0.65) compared to the IMA- and internal iliac artery-dominant groups (0.43).
  • Intraoperative angiography clearly depicted the meandering mesenteric artery in the SMA-dominant group.

Conclusions:

  • Transanal Doppler examination and IMA stump pressure measurement are valuable tools for assessing the dominant artery supplying the IMA bed.
  • These methods can help predict colonic viability during abdominal aortic surgery.