BackgroundIn the immediate postoperative period, neither have the incidence and risk factors of occult anastomotic leakage (AL) in patients with diverting stoma (DS) been clarified, nor have methods to assess anastomosis been standardized. Before introducing “early stoma closure”, both standardized inclusion and exclusion criteria and standardized methods to assess anastomosis are necessary. The aim of this study was to elucidate the incidence and risk factors of occult AL in patients who had undergone rectal resection with DS and to evaluate the significance of computed tomography (CT) following water-soluble contrast enema (CE) to detect occult anastomotic leakage.MethodsThis was a single institutional prospective observational study of patients who had undergone rectal resection with DS between May and October 2019. All patients had undergone CE and CT to assess for anastomosis on postoperative day (POD) 7, and CT was performed just after CE. Univariate analysis was performed to assess the relationship between preoperative variables and the incidence of occult AL on POD 7ResultsThe incidence of occult AL on postoperative day 7 was 40%. Hand-sewn anastomosis, compared with stapled anastomosis, was a statistically significant risk factor (p=0.0406). Five more cases with occult AL that could not be detected with CE could be detected on CT following CE; CE alone had a 33% false-negative radiological result rate.ConclusionsHand-sewn anastomosis was a risk factor for occult AL, and CE alone had a high false-negative radiological result rate. When considering the introduction of early stoma closure, stapled anastomosis and CT following CE could be an appropriate inclusion criterion and preoperative examination, respectively.
Objective: Laparoscopic surgery for diverticular colovesical fistula (CVF) is technically challenging, and the incidence of conversion to open surgery (COS) is high. The aims of this study were to review our experience with laparoscopic surgery for diverticular CVF and to identify preoperative risk factors for COS. Results: This was a single institution, retrospective, observational study of 11 patients who had undergone laparoscopic sigmoid colon resection with fistula resection for diverticular CVF from 2014 to 2019. Preoperative magnetic resonance imaging (MRI) was utilized to evaluate fistula location in the bladder, patency of the rectovesical pouch, and estimated contact area between the sigmoid colon and bladder. The relationship between preoperative variables and incidence of COS was analyzed between completed laparoscopy and COS groups. The overall incidence of postoperative morbidity (Clavien–Dindo classification Grade II or higher) was 36% (4/11). Severe morbidity, reoperation, and mortality were not observed. The incidence of COS was 27% (3/11). Posterior bladder fistulas were significantly associated with COS ( p = 0.006 ). CVFs located on the posterior bladder appears to be a risk factor for COS. Identifying the risk factors for COS preoperatively could help guide the intraoperative course.
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