Abstract
Background With endoscopic ultrasound-guided hepaticogastrostomy (EUS-HGS), guidewire manipulation
might be a critically limiting step for nonexperts. However, the causes of difficult
guidewire manipulation remain unclear. The aim of this study was to evaluate factors
associated with successful guidewire manipulation.
Methods This retrospective cohort study included consecutive patients who underwent EUS-HGS
between October 2018 and October 2019. We measured scope angle between the long and
needle axes of the echoendoscope using still fluoroscopic imaging immediately after
puncturing the intrahepatic bile duct. Factors associated with successful guidewire
insertion were assessed by multivariable analysis using logistic regression.
Result The influence of the angle between the fine-needle aspiration (FNA) needle and echoendoscope
on failed guidewire insertion was assessed using receiver operating characteristic
(ROC) curves. Area under the ROC curve was 0.86 (95 % confidence interval [CI] 0.00 – 0.76),
and an angle of 135° offered 88.0 % sensitivity and 82.9 % specificity for predicting
successful guidewire insertion. According to multivariable analysis, only angle between
the FNA needle and echoendoscope > 135° was independently associated with successful
guidewire insertion (odd ratio 0.03, 95 %CI 0.01 – 0.14; P < 0.05), whereas sex, puncture site, and diameter of puncture site were not significant
factors. After multivariable analysis, all variables were adjusted using age ≥ 70
or < 70 years, yielding the same results.
Conclusion The angle between the FNA needle and echoendoscope might be associated with successful
guidewire manipulation during EUS-HGS. Adjusting this angle to 135° before puncturing
the intrahepatic bile duct might be helpful in achieving successful guidewire manipulation
during EUS-HGS.