The stapled ileal pouch--anal anastomosis. A randomized study comparing two different pouch designs

Area of Science:

• Gastroenterology and Surgical Innovation
• Colorectal Surgery Techniques
• Anorectal Physiology

Background:

• Restorative proctocolectomy is a key procedure for ulcerative colitis and familial adenomatous polyposis.
• Ileal pouch-anal anastomosis (IPAA) construction techniques significantly impact functional outcomes.
• Stapled techniques (STP) offer an alternative to hand-sewn anastomoses in IPAA.

Purpose of the Study:

• To compare the manovolumetric and functional outcomes of J-type versus K-type ileal pouches constructed with double stapling (STP).
• To evaluate the functional results of STP IPAA against historical controls with hand-sutured anastomoses.

Main Methods:

• Thirty patients underwent restorative proctocolectomy with randomized J-type or K-type ileal pouch construction using STP.
• Manovolumetric assessments and 24-hour functional data were collected over a minimum 6-month follow-up.
• Resting anal pressures were compared to historical controls.

Main Results:

• K pouches achieved significantly larger volumes (361 ml) than J pouches (283 ml) at 6 months (p<0.01).
• Patients with K pouches experienced reduced 24-hour bowel frequency (4.4 vs 5.8; p<0.05).
• STP patients demonstrated superior overall functional results compared to historical controls, especially early postoperatively.

Conclusions:

• K-type ileal pouches constructed via double stapling (STP) offer superior manovolumetric capacity and improved functional outcomes.
• STP IPAA provides better functional results than traditional hand-sewn techniques, particularly in the early postoperative phase.
• These findings support the use of K-type pouches and STP in restorative proctocolectomy for enhanced patient function.