Infección de sitio quirúrgico tras apendicectomía urgente: tasa global y tipo según la vía de abordaje (abierta/laparoscópica) / Postappendectomy surgical site infection: Overall rate and type according to open/laparoscopic approach

OBJETIVO: Evaluar la incidencia y el perfil de la infección de sitio quirúrgico (ISQ) postapendicectomía en relación con la vía de abordaje (abierta [AA] vs laparoscópica [AL]).Material y método Estudio observacional analítico de cohortes, con pacientes > 14 años intervenidos por sospecha de apendicitis aguda a lo largo de 4 años (2007-2010) en un hospital de tercer nivel (n = 868), divididos en 2 grupos según la vía de abordaje para la apendicectomía (AL, grupo de estudio, 135; AA, grupo control, 733). Variable resultado: ISQ, global y por tipos. Estratificación del riesgo infeccioso mediante: a) índice NNIS (bajo riesgo: NNIS 0E, 0 y 1; alto riesgo: NNIS 2 y 3); b) estadio evolutivo apendicular (bajo riesgo: normal o flemonoso; alto riesgo: gangrenoso o perforado). Análisis estadístico: software SPSS. Resultado principal y análisis estratificado con el test de χ2. Parámetros de riesgo: OR cruda y de Mantel-Haenszel respectivamente, con su IC 95% y aceptando significación estadística con p < 0,05.ResultadosAmbos grupos fueron homogéneos en cuanto a edad, género, ASA y formas evolucionadas. ISQ global: 13,4% (más de la mitad detectadas en el seguimiento tras el alta). Distribución: AA, 13% (superficial 9%, profunda 2%, órgano-espacio 2%); AL, 14% (superficial 5%, profunda 1%, órgano-espacio 8%) (global: n.s.; distribución: p < 0,000). El análisis estratificado mostró asociación entre ISQ parietal/acceso abierto e ISQ órgano-espacio/abordaje laparoscópico y que resulta especialmente evidente en pacientes de alto riesgo de ISQ postoperatoria (NNIS alto o presentación evolucionada).Conclusión La AA conlleva un mayor riesgo de ISQ parietal y la AL de órgano-espacio. Esta asociación es especialmente evidente en pacientes con especial riesgo de ISQ

OBJECTIVE: To compare the incidence and profile of surgical site infection (SSI) after laparoscopic (LA) oropen (OA) appendicectomy. MATERIAL AND METHOD: Observational and analytical study was conducted on patients older than 14 years old with suspected acute appendicitis operated on within a 4-year period (2007-2010) at a third levelhospital (n = 868). They were divided in two groups according to the type of appendicectomy (LA, study group, 135; OA, control group, 733). The primary endpoint was a surgical site infection (SSI), and to determine the overall rate and types (incisional/organ-space). The risk of SSI was stratified by: i) National Nosocomial Infection Surveillance (NNIS) index (low risk: 0E, 0 and 1; high risk: 2 and 3); ii) status on presentation (low risk: normal or phlegmonous; high risk: gangrenous or perforated). The statisticalanalysis was performed using the software SPSS. The main result and stratified analysis was determined with 2, and the risk parameters using OR and Mantel-Haenszel OR with 95%CI, accepting statistical significance with P < .05. RESULTS: Age, gender, ASAindex and incidence of advanced cases were similar in both groups. The overall lSSI rate was 13.4% (more than a half of them detected during follow-up after discharge). Type of SSI: OA,13% (superficial 9%, deep 2%, organ-space 2%); AL, 14% (superficial 5%, deep 1%, organ-space 8%) (overall:not significant; distribution: P < .000). Stratified analysis showed that there is an association between incisional SSI/OA and organ-space SSI/LA, and is particularly stronger in those patients with high risk of postoperative SSI (high risk NNIS or gangrenous-perforated presentation).CONCLUSION: OA and LA are associated with a higher rate of incisional and organ-space SSI respectively. This is particularly evident in patients with high risk of SSI

[Post-appendectomy surgical site infection: overall rate and type according to open/laparoscopic approach]. / Infección de sitio quirúrgico tras apendicectomía urgente: tasa global y tipo según la vía de abordaje (abierta/laparoscópica).

OBJECTIVE: To compare the incidence and profile of surgical site infection (SSI) after laparoscopic (LA) or open (OA) appendicectomy. MATERIAL AND METHOD: Observational and analytical study was conducted on patients older than 14years-old with suspected acute appendicitis operated on within a 4-year period (2007-2010) at a third level hospital (n=868). They were divided in two groups according to the type of appendicectomy (LA, study group, 135; OA, control group, 733). The primary endpoint was a surgical site infection (SSI), and to determine the overall rate and types (incisional/organ-space). The risk of SSI was stratified by: i)National Nosocomial Infection Surveillance (NNIS) index (low risk: 0E, 0 and 1; high risk: 2 and 3); ii)status on presentation (low risk: normal or phlegmonous; high risk: gangrenous or perforated). The statistical analysis was performed using the software SPSS. The main result and stratified analysis was determined with χ(2), and the risk parameters using OR and Mantel-Haenszel OR with 95%CI, accepting statistical significance with P<.05. RESULTS: Age, gender, ASA index and incidence of advanced cases were similar in both groups. The overall SSI rate was 13.4% (more than a half of them detected during follow-up after discharge). Type of SSI: OA, 13% (superficial 9%, deep 2%, organ-space 2%); AL, 14% (superficial 5%, deep 1%, organ-space 8%) (overall: not significant; distribution: P<.000). Stratified analysis showed that there is an association between incisional SSI/OA and organ-space SSI/LA, and is particularly stronger in those patients with high risk of postoperative SSI (high risk NNIS or gangrenous-perforated presentation). CONCLUSION: OA and LA are associated with a higher rate of incisional and organ-space SSI respectively. This is particularly evident in patients with high risk of SSI.

Risk factors and classifications of hilar cholangiocarcinoma.

Cholangiocarcinoma is the second most common primary malignant tumor of the liver. Perihilar cholangiocarcinoma or Klatskin tumor represents more than 50% of all biliary tract cholangiocarcinomas. A wide range of risk factors have been identified among patients with Perihilar cholangiocarcinoma including advanced age, male gender, primary sclerosing cholangitis, choledochal cysts, cholelithiasis, cholecystitis, parasitic infection (Opisthorchis viverrini and Clonorchis sinensis), inflammatory bowel disease, alcoholic cirrhosis, nonalcoholic cirrhosis, chronic pancreatitis and metabolic syndrome. Various classifications have been used to describe the pathologic and radiologic appearance of cholangiocarcinoma. The three systems most commonly used to evaluate Perihilar cholangiocarcinoma are the Bismuth-Corlette (BC) system, the Memorial Sloan-Kettering Cancer Center and the TNM classification. The BC classification provides preoperative assessment of local spread. The Memorial Sloan-Kettering cancer center proposes a staging system according to three factors related to local tumor extent: the location and extent of bile duct involvement, the presence or absence of portal venous invasion, and the presence or absence of hepatic lobar atrophy. The TNM classification, besides the usual descriptors, tumor, node and metastases, provides additional information concerning the possibility for the residual tumor (R) and the histological grade (G). Recently, in 2011, a new consensus classification for the Perihilar cholangiocarcinoma had been published. The consensus was organised by the European Hepato-Pancreato-Biliary Association which identified the need for a new staging system for this type of tumors. The classification includes information concerning biliary or vascular (portal or arterial) involvement, lymph node status or metastases, but also other essential aspects related to the surgical risk, such as remnant hepatic volume or the possibility of underlying disease.