Artificial anal sphincter: prospective clinical and manometric evaluation

Area of Science:

• Gastroenterology
• Surgical Devices
• Pelvic Floor Disorders

Background:

• Severe anal incontinence often requires advanced treatment when local therapies fail.
• The efficacy of the artificial anal sphincter (AAS) in managing such cases remains under investigation.

Purpose of the Study:

• To prospectively evaluate the functional outcomes of artificial anal sphincter implantation in patients with severe anal incontinence.
• To assess continence, rectal emptying, and patient satisfaction following AAS implantation.

Main Methods:

• A prospective study of 24 patients with severe anal incontinence who underwent artificial anal sphincter implantation.
• Patients were evaluated for continence, rectal emptying, and satisfaction at baseline and six-month intervals post-surgery.
• Anal manometry was used to assess resting anal pressures and cuff reocclusion times.

Main Results:

• Significant improvement in fecal incontinence scores (P<0.0001) was observed post-implantation.
• 83% of patients had a functioning device at the end of follow-up, with 75% reporting high satisfaction.
• Anal manometry showed increased resting anal pressures with the device closed, indicating improved sphincteric function.

Conclusions:

• The artificial anal sphincter provides effective and prolonged functional results for severe anal incontinence.
• The device successfully reproduces an efficient sphincteric mechanism, improving anal occlusion and rectal emptying in most patients.
• Careful patient selection and management are crucial for minimizing explantation rates and maximizing positive outcomes.