Endorectal Three-dimensional Ultrasound in the Diagnosis of Cryptogenic Fistulas of the Rectum.

A Prospective Comparative Study to Improve Preoperative Ultrasound Diagnosis of Rectal Fistulas in the Formation of Topical Diagnosis Using B-mode and Three-dimensional Image Reconstruction.

Prospective comparative parallel ultrasound diagnostic transrectal study in the diagnosis of cryptogenic fistulas of the rectum

It is planned to investigate 150 patients with cryptogenic fistulas. Patients will be divided into two groups: complete and incomplete internal fistulas of the rectum. Patients of the first group will undergo preoperative examination in the framework of transrectal ultrasound in B-mode, three-dimensional reconstruction of the image with a contrast of the fistula course with a solution of 1.5% hydrogen peroxide. Patients with incomplete internal fistulas of the rectum will also undergo transrectal ultrasound examination in B-mode and with three-dimensional image reconstruction. The results obtained in the two groups will be compared with the intraoperative revision.

Inclusion Criteria:

• Patients diagnosed with "fistula of the rectum"
• Patients diagnosed with cryptogenic fistulas
• Patients who have signed informed consent

Exclusion Criteria:

• Patients with perianal complications of Crohn's disease
• Рatients with post-traumatic fistulas
• Рatients with fistulas, drain pararectal cysts
• Рatients with anal fissures, complicated by rectal fistula
• Рatients who refused to participate in the study of their own free will