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Updated: Jan 26, 2026

A Large Animal Model for Pulmonary Hypertension and Right Ventricular Failure: Left Pulmonary Artery Ligation and Progressive Main Pulmonary Artery Banding in Sheep
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Pulmonary Artery Compression Facilitates Intersegmental Border Visualization.

Toshiki Yajima1, Kimihiro Shimizu1, Akira Mogi1

  • 1Division of General Thoracic Surgery, Integrative Center of General Surgery, Gunma University Hospital, Gunma, Japan.

The Annals of Thoracic Surgery
|April 6, 2019
PubMed
Summary
This summary is machine-generated.

This study introduces a simple method to improve visualization of lung segments during surgery. Compressing the interlobar artery enhances indocyanine green fluorescence, aiding surgeons in identifying borders for precise anatomic segmentectomy.

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Area of Science:

  • Thoracic Surgery
  • Surgical Imaging
  • Pulmonary Anatomy

Background:

  • Anatomic segmentectomy requires clear identification of intersegmental borders.
  • Intravenous indocyanine green (ICG) with infrared thoracoscopy is a key tool for border visualization.
  • Visualization challenges, particularly in the upper lobe due to lower blood flow, can impede surgical precision.

Purpose of the Study:

  • To describe a novel technique for enhancing intersegmental border visualization during upper lobe segmentectomy.
  • To improve the reliability of infrared thoracoscopy with ICG fluorescence in challenging surgical cases.

Main Methods:

  • A technique involving interlobar pulmonary artery compression was developed.
  • This method aims to augment indocyanine green fluorescence in the target lung segment.
  • The technique was applied during infrared thoracoscopy for upper lobe segmentectomy.

Main Results:

  • Interlobar pulmonary artery compression significantly improved the clarity of intersegmental border visualization.
  • Enhanced fluorescence facilitated precise identification of surgical planes, overcoming limitations of reduced upper lobe blood flow.
  • The method proved simple and effective in clinical application.

Conclusions:

  • Interlobar pulmonary artery compression is a valuable adjunct for improving ICG fluorescence and intersegmental border identification during upper lobe segmentectomy.
  • This technique enhances surgical accuracy and safety in anatomic lung resections.
  • The described method offers a practical solution to a common challenge in thoracoscopic surgery.