Colorectal Surgery Review

Key topics covered in the episode include: Definition and Physiology: Fecal incontinence is defined as the uncontrolled passage of stool or gas for at least one month in a person who had previously achieved continence. Continence relies on a complex interplay of five factors: stool consistency, anal sphincter function, rectal compliance (the rectum's ability to store stool), neurologic functio...

In this episode, we review the principles and practice of endoscopy in colorectal surgery. Topics include indications for diagnostic and therapeutic endoscopy, scope design and function, and the essential steps for safe technique. We cover screening colonoscopy, polypectomy, management of bleeding, and evaluation of inflammatory bowel disease, as well as the role of endoscopy in cancer detection a...

This episode reviews the physiology of the anorectum, focusing on the mechanisms of continence and defecation. We cover the anatomy and function of the internal and external anal sphincters, the puborectalis muscle, and the rectoanal inhibitory reflex. Sensory pathways, autonomic and somatic innervation, and the role of the pelvic floor are explained in detail, along with the coordination required...

In this episode, we explore the physiology of the colon — a vital but often misunderstood organ. Beginning with embryology, we review how the colon and rectum develop from the primitive gut, including the rotations of the midgut and the complex differentiation of the cloaca. These processes explain congenital anomalies such as malrotation, Hirschsprung’s disease, and anorectal malformations. We th...

We begin with the anal canal and pelvic floor. In colorectal surgery, it’s important to distinguish between the anatomic anal canal and the surgical anal canal. Continence depends on a coordinated set of muscles: the internal and external anal sphincters, and the puborectalis. The canal is lined by different epithelial types, with the dentate line as the critical landmark. That line separates endo...