The P-pouch: a New Ileal Reservoir Used in Restorative Proctocolectomy

PURPOSE: To evaluate the effectiveness of a P-pouch configuration with a reservoir and recycled segment in restorative proctocolectomy. METHODS: There were 11 patients who underwent the P-pouch procedure. They were compared with healthy eight-control subjects. The P-pouch configuration was constructed using one firing of a 10 cm GIA stapler to form a 12-cm reservoir. Following that, the distal ileum (15+/-0.5 cm) was anastomosed to the proximal portion of the pouch. Pouch function was studied 23.3+/-4.4 months after ileostomy closure. We measured the frequency and amount of stool. The postprandial plasma peptide YY (PYY) response and the scintigraphic studies using 99m-Tc sulfur colloid were used to study transit. RESULTS: In the patient group, daily stool frequency and volume were 5.2+/-0.3 and 423.5+/-23.7 g, respectively. Stool seepage and pouchitis occurred in 45.5 % and 9.1%. In contrast to other pouch procedures, the postprandial increment of plasma PYY was similar the P-pouch patients and healthy controls (P>0.05). The integrated increment of plasma PYY for 180 minutes following meals was also not decreased in 9-pouch patient group compared with the healthy controls (1,050.0+/-127.8 pmol/l vs. 1146.0+/-150.0 pmol/l, P>0.05). Small intestinal transit time for healthy controls and the patient group averaged 89+/-21 and 117+/-12 minutes (P>0.05). The capacity of the ileal pouch was 372+/-22 ml, and the efficiency of ileal reservoir evacuation was 76 %. CONCLUSIONS: The P-pouch is a new and improved simple modification of the well-established J-pouch procedure, constructed using a single firing of a GIA stapler.

Reservação da arcada vascular do cólon direito para o alongamento mesenterial na cirurgia do reservatório ileal / Preservation of the vascular arcade of the right colon to the mesentery lengthening in the ileal pouch procedure

OBJETIVO: Avaliar a eficácia da preservação da arcada vascular do cólon direito (AVCD) na manutenção da perfusão sangüínea do reservatório após manobras de alongamento do mesentério ileal. MÉTODOS: O estudo incluiu 46 pacientes (janeiro/1990 a julho/2000, para o tratamento de retocolite ulcerativa (RCU) e polipose adenomatosa familiar (PAF), que foram divididos em dois grupos: grupo com preservação da arcada (CPA), 27 pacientes, média de idade - 34,0 (19-53) anos, 15 (55,6 por cento) eram do sexo feminino e 24 (88,9 por cento) eram brancos; e grupo sem preservação da arcada (SPA), 19 pacientes, média de idade 41,5 (13 - 62) anos, oito (42,1 por cento) eram do sexo feminino e 18 (94,8 por cento) eram brancos. Trinta pacientes (65,2 por cento) apresentavam RCU e 16 (34,7 por cento) PAF. Foram comparadas a ocorrência de complicações atribuídas à má perfusão sangüínea ou tensão na anastomose ileoanal, assim como as indicações de reoperações. RESULTADOS: No grupo CPA, em quatro pacientes (18,5 por cento), as complicações estavam relacionadas ao comprometimento da viabilidade intestinal ou à tensão ao nível da anastomose. No grupo SPA, estas complicações ocorreram em sete pacientes (36,9 por cento). Foram reoperados três pacientes (11,1 por cento) do grupo CPA, por causas relacionadas ou à má perfusão sangüínea ou à tensão excessiva no nível da anastomose e no grupo SPA cinco (26,3 por cento), pela mesma causa. CONCLUSÕES: Apesar das limitações metodológicas, observou-se tendência para menor ocorrência de complicações isquêmicas no grupo com preservação da AVCD. Quando o abaixamento do reservatório ileal tem que ser ao nível da linha pectínea, torna-se importante a perfusão sangüínea via AVCD como auxiliar na preservação de sua viabilidade.

BACKGROUND: The aim of this study was to analyze the efficacy of the preserved vascular arcade of the right colon (MVA) on maintaining blood perfusion to the pouch following mesenteric lenghtening maneuvers. METHODS: Forty six patients submitted to total proctocolectomy and ileal pouch-anal anastomosis for the treatment of ulcerative colitis (UC) and adenomatous familial polyposis (AFP), from January 1990 to July 2000, were divided in two groups: Group With Preservation of the Arcade (WPA), 27 patients, mean age 34,0 (19-53) years, 15 (55,6 percent) were female, and 24 (88,9 percent) were white; and Group Without Preservation of the Arcade (WOPA), 19 patients, mean age 41,5 (13-62) years, 8 were female (42,1 percent), and 18 (94,8 percent) were white. Thirty patients (65,2 percent) had UC and 16 (34,7 percent) had AFP. Analyzes were made by the comparison of the incidence of complications due to blood perfusion failure or overtension in the ileoanal anastomosis, as well as the need of revision operation. RESULTS: In the group WPA, 4 patients (14.8 percent) had complications being related to ischemia or anastomosis overtension. In the group WOPA, it was seen in 7 patients (36,9 percent). Three patients (11,1 percent) of the Group WPA were submitted on to revision operation due to complications related to ischemia or anastomotic overtension and 5 (26,3 percent) in the Group WOPA, for the same reasons. CONCLUSIONS: Besides methodological limitations, it was possible to identify a tendency to less occurrence of ischemia or anastomotic overtension related complications in the Group WPA. To perform a ileal pouch pull through operation, placing the anastomosis at the level of the pectinate line, the preserved MVA is an important technical aspect, helping to maintaining the viability and function of the pouch.