Initial Computed Tomography Findings of Long and Distended Colon Are Risk Factors for the Recurrence of Sigmoid Volvulus

Sigmoid volvulus-Can CT features predict outcomes and recurrence?

OBJECTIVES

Sigmoid volvulus (SV) is a common cause of bowel obstruction, especially in older patients. SV can be mesenteroaxial (M-SV) or organoaxial (O-SV). The purpose of this study was to assess if CT findings in SV are associated with clinical outcomes. including recurrence, choice of management, and mortality.

MATERIALS AND METHODS

This study includes patients with SV and a CT within 24 hours of presentation. CT features, including mesenteraoxial/organoaxial arrangement, direction of rotation, transition points, distension, whirl-sign, ischemia, and perforation were determined. Demographics, treatment, recurrence, and outcome data were recorded.

RESULTS

One hundred and seventeen cases were diagnosed in 80 patients (54 male). The mean age was 70 years (± 17.1). M-SV and O-SV were equally prevalent (n = 39 vs. n = 41, respectively). M-SV was significantly more common with anticlockwise rotation in the axial plane (p = 0.028) and clockwise rotation in the coronal plane (p = 0.015). All patients with imaging features of ischemia underwent surgery (n = 6). There was no significant difference in outcome variables (30-day mortality, 30-day readmission, recurrence) between the O-SV and M-SV groups. The degree of bowel distension on initial presentation was a significant predictor of recurrence, with ≥ 9 cm vs < 9 cm associated with an increased odds of any recurrence (OR: 3.23; 95%CI: 1.39-7.92).

CONCLUSION

In SV, sigmoid distension of more than 9 cm at baseline CT was associated with an increased risk of recurrence. Imaging features of ischemia predicted surgical over endoscopic intervention. Organoaxial and mesenteroaxial SV had similar prevalence, but the type of volvulus was not associated with clinical outcomes or choice of management.

CLINICAL RELEVANCE STATEMENT

There is a risk of recurrent sigmoid volvulus with colonic distension greater than 9 cm. This work, comparing volvulus subtypes, shows that this finding at the initial presentation could expedite consideration for surgical management.

KEY POINTS

Reports of outcomes for different subtypes and rotational directions of volvuli have been contradictory. No difference in measured outcomes was found between subtypes; distension ≥ 9 cm predicted recurrence. CT features can aide management of sigmoid volvulus and can prompt surgical intervention.

Endoscopic Decompression of Sigmoid Volvulus: Review of 748 Patients

Background: Sigmoid volvulus (SV) is the twisting of the sigmoid colon around itself. Endoscopy both helps diagnosis and provides treatment in the absence of peritonitis or perforation in SV. Nevertheless, there are some controversies or limitations on this subject. The aim of this study is to evaluate the current role of the endoscopic decompression in the treatment of SV. Materials and Methods: The clinical records of 1040 patients with SV treated over a 55-year period from June 1966 to July 2021 were reviewed retrospectively until June 1986 and prospectively thereafter. For each case, preoperational parameters, treatment options, and prognosis were noted. Results: Endoscopic decompression was tried in 748 patients (71.9%). The procedure was successful in 585 cases (83.2%), whereas unsuccessful in 118 (16.8%) of 703 patients (94.0%) with viable bowel. The mortality rate was 0.5% (4 patients), the morbidity rate was 1.9% (14 patients), the early recurrence rate was 5.5% (32 patients), whereas the mean hospitalization period was 34.6 hours (range: 24-96 hours). Conclusions: Despite some controversies or limitations in some subjects including the strategy in ischemic or gangrenous cases, the factors affecting the success, kind of the used instruments, technical details of the application, role of the flatus tubes, and the specific topics such as SV in childhood or pregnancy, endoscopic decompression is the first-line therapy in selected patients with SV.