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Right-Sided Ileostomy on Stoma Outlet Obstruction in Ulcerative Colitis: A Randomized Controlled Trial.

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Diseases of the colon and rectumKuwahara Ryuichi, Uchino Motoi, Tomoo Yusuke, et al.Published 4/1/2026Last synced 8/15/2026Status: syncedPMID: 41459769DOI: 10.1097/DCR.0000000000004087

Stoma outlet obstruction is a common complication after total proctocolectomy with IPAA for ulcerative colitis, occurring in 20% to 40% of cases. In contrast, the incidence of stoma outlet obstruction after low anterior resection is less than 10%. Because stomas are typically created in the right lower abdomen, we considered that small-bowel torsion and tension might be more pronounced after IPAA. Therefore, we hypothesized that creating a stoma in the left lower abdomen during IPAA could reduce the incidence of stoma outlet obstruction. To evaluate whether, compared with right-sided placement, left-sided stoma placement reduces the incidence of stoma outlet obstruction. Single-center, open-label, randomized controlled trial. Conducted at Hyogo Medical University, Japan. A total of 181 patients with ulcerative colitis who underwent IPAA with ileostomy between 2018 and 2024 were included. Patients were randomly assigned to receive a left-sided (Group L, n = 91) or right-sided (Group R, n = 90) ileostomy. Primary outcome includes stoma outlet obstruction incidence. Secondary outcomes include length of hospital stay and reoperation rate. The primary analysis was performed on an intention-to-treat basis. The incidence of stoma outlet obstruction was significantly lower in Group L (9.8%) than in Group R (31.1%; p = 0.0004). A left-sided stoma was an independent protective factor against stoma outlet obstruction (OR 0.24, 95% CI, 0.10-0.56; p = 0.001). Stoma outlet obstruction was

Abstract

Stoma outlet obstruction is a common complication after total proctocolectomy with IPAA for ulcerative colitis, occurring in 20% to 40% of cases. In contrast, the incidence of stoma outlet obstruction after low anterior resection is less than 10%. Because stomas are typically created in the right lower abdomen, we considered that small-bowel torsion and tension might be more pronounced after IPAA. Therefore, we hypothesized that creating a stoma in the left lower abdomen during IPAA could reduce the incidence of stoma outlet obstruction. To evaluate whether, compared with right-sided placement, left-sided stoma placement reduces the incidence of stoma outlet obstruction. Single-center, open-label, randomized controlled trial. Conducted at Hyogo Medical University, Japan. A total of 181 patients with ulcerative colitis who underwent IPAA with ileostomy between 2018 and 2024 were included. Patients were randomly assigned to receive a left-sided (Group L, n = 91) or right-sided (Group R, n = 90) ileostomy. Primary outcome includes stoma outlet obstruction incidence. Secondary outcomes include length of hospital stay and reoperation rate. The primary analysis was performed on an intention-to-treat basis. The incidence of stoma outlet obstruction was significantly lower in Group L (9.8%) than in Group R (31.1%; p = 0.0004). A left-sided stoma was an independent protective factor against stoma outlet obstruction (OR 0.24, 95% CI, 0.10-0.56; p = 0.001). Stoma outlet obstruction was associated with a longer hospital stay (median: 33 vs 22 days, p < 0.001). No significant difference was found in reoperation rates between the L and R groups. Single-center study; generalizability to other populations is uncertain. Left-sided stoma placement significantly reduces the incidence of stoma outlet obstruction in IPAA for ulcerative colitis and may be a preferable approach to improve postoperative outcomes. See Video Abstract. University Hospital Medical Information Network Clinical Trials Registry: UMIN-CTR 000023750. ANTECEDENTES:La obstrucci&#xf3;n de la salida del estoma es una complicaci&#xf3;n frecuente tras una proctocolectom&#xed;a total con anastomosis ileoanal en casos de colitis ulcerosa, que se produce en entre el 20 % y el 40 % de los casos. Por el contrario, la incidencia de obstrucci&#xf3;n de la salida del estoma tras una resecci&#xf3;n anterior baja es inferior al 10 %. Dado que los estomas se crean normalmente en la parte inferior derecha del abdomen, consideramos que la torsi&#xf3;n y la tensi&#xf3;n del intestino delgado podr&#xed;an ser m&#xe1;s pronunciadas tras una anastomosis ileoanal. Por lo tanto, planteamos la hip&#xf3;tesis de que la creaci&#xf3;n de un estoma en la parte inferior izquierda del abdomen durante la anastomosis ileoanal podr&#xed;a reducir la incidencia de obstrucci&#xf3;n de la salida del estoma.OBJETIVO:Evaluar si, en comparaci&#xf3;n con la colocaci&#xf3;n en el lado derecho, la colocaci&#xf3;n del estoma en el lado izquierdo reduce la incidencia de obstrucci&#xf3;n de la salida del estoma.DISE&#xd1;O:Ensayo controlado aleatorio, abierto y unic&#xe9;ntrico.ENTORNO:Realizado en la Universidad M&#xe9;dica de Hyogo, Jap&#xf3;n.PACIENTES:Se incluy&#xf3; a un total de 181 pacientes con colitis ulcerosa que se sometieron a una anastomosis ileoanal con ileostom&#xed;a entre 2018 y 2024.INTERVENCIONES:Los pacientes fueron aleatorizados para recibir una ileostom&#xed;a en el lado izquierdo (grupo L, n = 91) o en el lado derecho (grupo R, n = 90).PRINCIPALES MEDIDAS DE RESULTADO:Resultado principal: incidencia de obstrucci&#xf3;n de la salida del estoma. Resultados secundarios: duraci&#xf3;n de la estancia hospitalaria y tasa de reintervenci&#xf3;n. El an&#xe1;lisis principal se realiz&#xf3; sobre la base de la intenci&#xf3;n de tratar.RESULTADOS:La incidencia de obstrucci&#xf3;n de la salida del estoma fue significativamente menor en el grupo L (9,8 %) que en el grupo R (31,1 %; p = 0,0004). Un estoma en el lado izquierdo fue un factor protector independiente contra la obstrucci&#xf3;n de la salida del estoma (odds ratio 0,24, intervalo de confianza del 95 % 0,10-0,56; p = 0,001). La obstrucci&#xf3;n de la salida del estoma se asoci&#xf3; con una estancia hospitalaria m&#xe1;s prolongada (mediana: 33 frente a 22 d&#xed;as, p < 0,001). No se encontraron diferencias significativas en las tasas de reintervenci&#xf3;n entre los grupos L y R.LIMITACIONES:Estudio de un solo centro; la generalizaci&#xf3;n a otras poblaciones es incierta.CONCLUSIONES:La colocaci&#xf3;n del estoma en el lado izquierdo reduce significativamente la incidencia de obstrucci&#xf3;n de la salida del estoma en la anastomosis ileoanal para la colitis ulcerosa y puede ser un enfoque preferible para mejorar los resultados posoperatorios. (AI-generated translation ).

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