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Parks 分类法改良在肛门腺源性隐匿性肛瘘中的应用。

Modification of Parks Classification of Cryptoglandular Anal Fistula.

机构信息

Department of General Surgery, Colorectal Surgery Unit, Mansoura Faculty of Medicine, Mansoura University, Mansoura, Egypt.

出版信息

Dis Colon Rectum. 2021 Apr 1;64(4):446-458. doi: 10.1097/DCR.0000000000001797.

DOI:10.1097/DCR.0000000000001797
PMID:33399407
Abstract

BACKGROUND

The Parks classification has been used for the classification of anal fistula for several years, but it does not allow for risk factors for failure after surgery.

OBJECTIVE

This study aimed to describe a modification of the Parks classification of anal fistula and examine its predictive validity in the assessment of the outcome of anal fistula in terms of failure of healing and fecal incontinence.

DESIGN

This is a retrospective review of a prospective database.

SETTING

This study was conducted in the Colorectal Surgery Unit, Mansoura University Hospitals.

PATIENTS

Adult patients with anal fistula who underwent surgery were included.

INTERVENTIONS

Five risk factors for failure after fistula surgery were identified from the literature and were examined by multivariate analysis of our patients. Four risk factors proved to be significant independent predictors of failure: secondary extensions, horseshoe fistula, previous fistula surgery, and anterior anal fistula in women. We modified the Parks classification by dividing the transsphincteric type into high and low and by grouping supra- and extrasphincteric anal fistulas into 1 group. The first 3 stages were subdivided according to the absence or presence of predictors of failure.

MAIN OUTCOME MEASURES

The primary outcome measured was the validity of the modified Parks classification with regard to the rates of failure and fecal incontinence after surgical treatment of each stage of anal fistula.

RESULTS

A total of 665 patients with cryptoglandular anal fistula were included. Failure rates increased from 2.3% (95% CI, 0.9%-4.7%), to 17.4% (95% CI, 10.8%-25.9%), 19.5% (95% CI, 15%-24.6%), and 30.7% (95% CI, 9.1%-61.4%) across the 4 stages. The area under the receiver operating characteristic curve was 0.90 (95% CI, 0.85-0.94) indicating the strong discriminative ability of the final multivariable predictive model. The increase in failure and incontinence rates across the fistula stages was significant.

LIMITATIONS

This is a retrospective, single-center study.

CONCLUSION

Inclusion of predictors of poor outcome into the modified classification helped differentiate simple and complex fistulas within each stage and between the different stages, which can help in assessment and decision making for anal fistula. See Video Abstract at http://links.lww.com/DCR/B441.

MODIFICACIN DE LA CLASIFICACIN DE PARKS DE LA FSTULA ANAL CRIPTOGLANDULAR

ANTECEDENTES:La clasificación de Parks se ha utilizado para la clasificación de la fístula anal durante varios años, sin embargo, no tuvo en cuenta los factores de riesgo de fracaso después de la cirugía.OBJETIVO:Describir una modificación de la clasificación de Parks de fístula anal y examinar su validez predictiva en la evaluación de los resultados de la fístula anal en términos de fracaso de la cicatrización e incontinencia fecal.DISEÑO:Revisión retrospectiva de la base de datos prospectiva.AJUSTE:Unidad de Cirugía Colorrectal, Hospital Universitario de Mansoura.PACIENTES:Pacientes adultos con fístula anal intervenidos quirúgicamente.INTERVENCIONES:Se identificaron cinco factores de riesgo de fracaso después de la cirugía de fístula de la literatura y se examinaron mediante análisis multivariante de nuestros pacientes. Cuatro factores de riesgo demostraron ser importantes predictores independientes de fracaso: extensiones secundarias, fístula en herradura, cirugía de fístula previa y fístula anal anterior en mujeres. Modificamos la clasificación de Parks dividiendo el tipo transesfinteriano en alto y bajo y agrupando la fístula anal supraesfinteriana y extraesfinteriana en un grupo. Las tres primeras etapas se subdividieron según la ausencia o presencia de predictores de fracaso.PRINCIPALES MEDIDAS DE RESULTADO:Validez de la clasificación de Parks modificada con respecto a las tasas de fracaso e incontinencia fecal después del tratamiento quirúrgico de cada etapa de la fístula anal.RESULTADOS:Se incluyeron 665 pacientes con fístula anal criptoglandular. Las tasas de fracaso aumentaron del 2,3% (IC del 95%: 0,9-4,7%), al 17,4% (IC del 95%: 10,8 al 25,9%), 19,5% (IC del 95%: 15-24,6%) y 30,7% (95% IC: 9,1- 61,4%) en las cuatro etapas. El área bajo la curva característica operativa del receptor fue 0,90 (IC del 95%: 0,85-0,94), lo que indica una fuerte capacidad discriminativa del modelo predictivo multivariable final. El aumento en las tasas de fracaso e incontinencia en las etapas de la fístula fue significativo.LIMITACIONES:Estudio retrospectivo, unicéntrico.CONCLUSIÓN:La inclusión de predictores de mal resultado en la clasificación modificada ayudó a diferenciar las fístulas simples y complejas dentro de cada etapa y entre las diferentes etapas, lo que puede ayudar en la evaluación y toma de decisiones para la fístula anal. Consulte Video Resumen en http://links.lww.com/DCR/B441.

摘要

背景

Parks 分类法已经使用了多年来对肛瘘进行分类,但它不能预测手术后失败的风险因素。

目的

本研究旨在描述一种改良的 Parks 肛瘘分类法,并检验其在评估肛瘘愈合和粪便失禁失败方面的预测有效性。

设计

这是一项前瞻性数据库的回顾性研究。

地点

曼苏拉大学医院的肛肠外科病房。

患者

接受肛瘘手术的成年患者。

干预措施

从文献中确定了肛瘘手术后失败的 5 个风险因素,并通过对我们患者的多因素分析进行了检查。有 4 个风险因素被证明是失败的显著独立预测因素:继发性延伸、马蹄形肛瘘、先前的肛瘘手术以及女性的前侧肛瘘。我们通过将经括约肌型分为高低两部分,并将肛上和肛外肛瘘分为一组,对 Parks 分类法进行了改良。前 3 个阶段根据失败预测因子的存在与否进行了细分。

主要观察指标

改良 Parks 分类法对每个肛瘘阶段手术治疗后失败和粪便失禁的有效性。

结果

共纳入 665 例隐源性肛瘘患者。失败率从 2.3%(95%CI,0.9%-4.7%)上升到 17.4%(95%CI,10.8%-25.9%)、19.5%(95%CI,15%-24.6%)和 30.7%(95%CI,9.1%-61.4%)。终末多变量预测模型的Receiver Operating Characteristic 曲线下面积为 0.90(95%CI,0.85-0.94),表明具有很强的区分能力。各肛瘘阶段的失败和失禁率增加具有统计学意义。

局限性

这是一项回顾性、单中心研究。

结论

将不良预后的预测因子纳入改良分类有助于区分每个阶段和不同阶段的简单和复杂瘘管,有助于评估和决策分析肛瘘。详见视频摘要:http://links.lww.com/DCR/B441。

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