Sigmoid volvulus is defined by acute strangulation of the colon by the twisting of the sigmoid loop around its mesenteric axis resulting in partial or complete obstruction of the colonic lumen . This pathology was actually described for the first time in 1836 by Rokitansky .
It is the most common intestinal volvulus and constitutes an absolute medical-surgical emergency . Its incidence reaches 50% of intestinal obstruction in developing countries, and 70% of patients are under 60 years old .
Diagnosis is clinically based on abdominal meteorism, stopping of material and gas, abdominal pain . Radiography of the abdomen without preparation or water-soluble enema found signs in favor of sigmoid volvulus in 90% of cases  by the demonstration of hydro-alaeic colic levels and or beak stoppage, bird of the contrast product.
The absence of a study on this pathology at Sikasso Hospital and the problematic of the disease justified our work.
This was a retrospective and prospective study performed in the general surgery department of Sikasso. This study concerned patients admitted from January 1, 2014 to December 31, 2017.
The parameters studied were the following: age, sex, clinical signs, paraclinical, treatment, and operative follow-up.
Our data was entered on the Word 2007 software, analyzed by SPSS10FR and processed on Word and epi-info software with significant P < 0.05.
We collected 54 cases of sigmoid volvulus, which accounted for 58.1% of colonic occlusions (Table 1), 19.6% of intestinal occlusions (Table 2), the annual frequency was 13.5 cases for year (Table 3), and 5.9% of operative operations in emergency.
Table 1. Frequency of sigmoid volvulus in colon obstruction.
The sigmoid volvulus accounted for 58.1% of colonic occlusions.
Table 2. Frequency of sigmoid volvulus in intestinal obstruction.
The sigmoid volvulus accounted for 19.6% of intestinal occlusions.
Table 3. Frequency of sigmoid volvulus according to the authors.
Abdominal pain, vomiting, stopping of materials and gases were present in 32 (59.3%) patients (Figure 3). Von Wahl’s triad was present in 36 patients (66.7%) (Table 4) the rectal ampoule empty in 92.6%.
The sigmoid was necrotic in 37% of cases, and a sigmoid volvulus and necrotic hail in 7.4% of cases. We found a simple sigmoid volvulus in 61% of cases (Table 7).
We performed an immediate anastomosis resection in 63%, a Hartmann resection in 29.6%, an immediate anastomosis resection plus an ileostomy in 7.4% (Table 8 and Table 9). Operative follow-up was simple in 85.2% (Table 10), with a morbidity of 11.1, and a mortality of 14.8% (Table 11).
The average age is 47.13 with the extremes of 18 - 102 years. The standard deviation is 18,861.
Figure 1. Age distribution of patients.
Male 81%, female 19%, sex ratio 4.26.
Figure 2. Patient distribution by gender.
Abdominal pain, vomiting, stopping of materials and gases were present in 32 (59.3%) patients.
Figure 3. Patient distribution by reason of consultation.
Table 4. Triad of Von Wahl according to the authors.
Table 5. Distribution of patients according to the results of the abdomen without preparation (ASP).
We found a double jamb image in 70.37% of the cases.
Table 6. Intake of the abdomen without preparation according to the authors.
Table 7. Distribution of patients according to the intraoperative diagnosis.
We found a simple sigmoid volvulus in 61% of cases.
Table 8. Distribution of patients according to the actions performed inoperative.
We performed an immediate anastomosis resection in 63% of cases.
Table 9. Surgical methods according to the authors.
Table 10. Distribution of patients according to the operative sequence at 6 months.
The operative suites were simple in 85.2% of cases.
Table 11. Overall mortality according to the authors.
Sigmoid volvulus is a relatively common condition in Africa and Asia. The studies found reported hospital frequencies ranging from 9.6 to 15 cases per year    . These reports seem to be superior to those published in the West (2 to 2.9 cases per year)  . This geographical difference has been reported by several authors   . According to these authors, sigmoid volvulus is rare in Western Europe and North America. On the other hand, it is particularly common in Central and Eastern Europe, Latin America, Africa and the Middle East where the frequency of dolichoclonal and congenital megacolon is a predisposing racial factor.
Von Wahl’s triad is the clinical translation of the volvated sigmoid loop  . It is defined by:
- A stationary and asymmetrical meteorism (in “rugby ball”);
It is usually complete. Our study differs from that of the Indian and Moroccan series  . This statistical difference is due to the delay of consultation of our patients.
The asymmetrical meteorism disappears in favor of the diffuse one when the symptoms evolve a long time .
X-ray of the abdomen without preparation is an essential examination to confirm the diagnosis of sigmoid volvulus by showing a typical image in the form of a double-legged arch .
According to Deneuville in France  it allows diagnosis in 70% of cases. Millat in France, Kevin in Australia, Khanna in India found conclusive rates of 60% to 80%   .
The statistical difference between our series and those of the authors mentioned above      is due to the fact that the typical image was not found in 16 of our patients (29.63%). They presented to ASP the image of colic-like water levels (higher than wide).
After a short resuscitation, all our patients were operated on. No patients underwent nonsurgical detorsion. In our study 34 (63%) patients underwent an immediate anastomosis resection, Hartmann’s two-stage colectomy was performed in 16 (29.6%) patients. 4 (7.4%) operated patients. Surgical exploration had found a sigmoid volvulus and hail with necrosis. Patients underwent pelvic resection with a Bouilly Volkmann-type ileostomy, and sigmoid resection with a colo-rectal anastomosis. In the Uptal Indian series  , however, all patients (100%) underwent immediate anastomosis resection, whereas in Khanna , unresectated surgical detorsion was most commonly performed (55%, 3%).
The mortality associated with sigmoid volvulus is relatively high. There is no significant difference between our results and those of the Turkish, Asian and African series       . The selected series found mortality rates ranging from 1.01% in Uptal in India  to 22.7% in Mehari in Eritrea . The low mortality rate in Uptal is due to the early management of the one hand and the accuracy of the therapeutic indication on the other hand. In this series , all patients underwent immediate anastomosis resection. The perioperative mortality is a function of the duration of the symptoms, the general condition of the patient, the vitality of the twisted loop and the surgical procedure .
Sigmoid volvulus is a serious surgical emergency requiring early diagnosis and management to improve prognosis. Pre-, postoperative and postoperative resuscitation associated with immediate anastomosis resection, or resection plus Hartmann, would reduce morbidity and mortality.
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