Role of Virtual Ruler-Based Diameter Measurement in Endoscopic Therapy for Cirrhotic Esophageal Varices: A Retrospective Multicenter Study.

Background: Esophageal variceal (EV) diameter is a critical, independent risk factor for hemorrhage, and plays a key role in guiding choices of endoscopic treatment techniques. We developed a novel tool, the virtual ruler (VR), which offers increased precision and expediency in EV diameter (EVD) measurements. This study investigates the clinical value of VR for assessing EVD during the endoscopic treatment of cirrhotic EVs. Methods: We performed a retrospective multicenter review of 345 cirrhotic patients with EVs who received endoscopic treatment. EVD was measured using VR, and several outcomes, including rebleeding rates, vascular eradication rates, mortality, and complication incidences, were compared in patients stratified by EVD as measured by both VR and endoscopists. Results: There was moderate agreement between VR and endoscopist measurements of EVD (Kappa = 0.591, p < 0.001). In patients with EVD > 1 cm, the VR group had a lower rebleeding rate after endoscopic treatment compared to the endoscopist group (3.8% vs. 11.3%; p=0.048). No significant between-group differences in outcomes were noted in patients with EVD ≤ 1 cm. Additionally, comparisons of endoscopic variceal ligation and endoscopic injection sclerotherapy within the VR-based diameter groups showed no substantial differences in treatment efficacy or adverse events (p > 0.05). Conclusion: Using VR to accurately measure EVD may help decrease endoscopist misjudgment of larger EVD values and may reduce postoperative rebleeding rates after endoscopic treatment. VR holds potential clinical significance in guiding endoscopic EV treatment. Trial Registration: Clinical Trial Registry identifier: ChiCTR2200064028.