Fístula pancreática: una complicación temida. Experiencia en una unidad de cirugía hepatobiliopancreática de cuarto nivel / Pancreatic fistula: A feared complication. Experience in a fourth level hepatobiliopancreatic surgery unit

Introducción. La fístula pancreática postoperatoria es una de las complicaciones más importantes en la cirugía hepatobiliopancreática. Su diagnóstico se hace mediante la presencia de un nivel de amilasa en el líquido de drenaje al menos tres veces por encima del valor de la amilasa en suero a partir del tercer día postoperatorio. El objetivo de este estudio fue caracterizar los pacientes con fístula pancreática postoperatoria en nuestra institución, evaluando la importancia de la detección temprana y el establecimiento de un manejo oportuno. Métodos. Estudio descriptivo, retrospectivo, que incluyó los pacientes sometidos a pancreatoduodenectomía, con diagnóstico de fístula pancreática postoperatoria como complicación de cirugía hepatobiliopancreática, en el Hospital Internacional de Colombia, en Piedecuesta, entre enero del 2017 y diciembre de 2020. Se excluyeron los pacientes con otro tipo procedimiento quirúrgico y aquellos que decidieron no participar en el estudio. Resultados. Se evaluaron 69 pacientes, con un predominio del sexo femenino (n=38; 55,1 %) y mediana de la edad de 57 años. El 33,3 % (n=24) de los pacientes intervenidos desarrollaron fístula pancreática postoperatoria, siendo el 23,2 % fuga bioquímica, grado B 8,7 % y grado C 2,9 %, para quienes se indicaron manejo expectante, control ecográfico y reintervención, respectivamente. Fallecieron 5 pacientes (7,2 %). Conclusiones. La fístula pancreáticapostoperatoria es una complicación para tener en cuenta en todos los pacientes sometidos a pancreatoduodenectomía. Existen estrategias que pueden permitir disminuir la incidencia de esta complicación, con el fin de mejorar el desenlace, el pronóstico y la morbilidad posquirúrgica.

Introduction. Postoperative pancreatic fistula is one of the most important complications in hepatobiliopancreatic surgery. Its diagnosis is made by the presence of an amylase level in the drainage fluid at least three times above the serum amylase value from the third postoperative day. The objective of this study was to characterize patients with postoperative pancreatic fistula at our institution, evaluating the importance of early detection and to establish a timely management. Methods. Descriptive, retrospective study that included patients who underwent pancreatoduodenectomy with a diagnosis of postoperative pancreatic fistula as a complication of hepatobiliopancreatic surgery at the Hospital Internacional Colombia, between January 2017 and December 2020. Patients with another type of procedure performed by this specialty and those who did not decide to participate in the study were excluded. Results. A total of 69 patients were included, the median age was 57 years with a predominance of females (n=38; 55.1%). 33.3% (n=24) of the operated patients developed postoperative pancreatic fistula, with 23.2% having a biochemical leak, grade B in 8.7% and grade C in 2.9%, for whom expectant management, ultrasound control and reintervention were indicated, respectively. Five patients died (7.2%). Conclusions. Pancreatic fistula is a complication to take into account in all patients undergoing pancreatoduodenectomy. There are strategies that can reduce the incidence of this complication and thus improve not only the outcome but also the prognosis and postoperative morbidity.

Establishment of a risk prediction model for pancreatic fistula after pancreaticoduodenectomy： A study based on the 2016 edition of the definition and classification system of pancreatic fistula / 临床肝胆病杂志

ObjectiveTo investigate the differences in the risk factors for postoperative pancreatic fistula （POPF） after pancreaticoduodenectomy （PD） between the 2005 and 2016 editions of the definition and classification standards for pancreatic fistula， and to establish a risk prediction model for pancreatic fistula based on the 2016 edition. MethodsA retrospective analysis was performed for the clinical data of 303 patients who were admitted to Tianjin Third Central Hospital and underwent PD from January 2016 to May 2022， and the patients with POPF were identified based on the new and old editions. The independent-samples t test or the non-parametric Mann-Whitney U test was used for comparison of continuous data between groups， and the chi-square test was used for comparison of categorical data between groups. The univariate and multivariate logistic regression analyses were used to investigate the differences in the risk factors for pancreatic fistula after PD between the two editions； a risk prediction model was established for POPF based on the 2016 edition， and the receiver operating characteristic curve was used to invesitgate the accuracy of this model in predicting POPF and perform model validation. ResultsAccording to the 2005 edition， the univariate analysis showed that the diameter of the main pancreatic duct （χ2=31.641， P<0.001）， main pancreatic duct index （χ2=52.777， P<0.001）， portal vein invasion （χ2=6.259， P=0.012）， intra-abdominal fat thickness （χ2=7.665， P=0.006）， preoperative biliary drainage （χ2=5.999， P=0.014）， pancreatic cancer （χ2=5.544， P=0.019）， marginal pancreatic thickness （t=2.055， P=0.032）， pancreatic CT value （t=-3.224， P=0.002）， and preoperative blood amylase level （Z=-2.099， P=0.036） were closely associated with POPF， and the multivariate logistic regression analysis showed that main pancreatic duct index （odds ratio ［OR］=0.000， 95% confidence interval ［CI］： 0.000‍ ‍—‍ ‍0.011， P<0.05）， pancreatic cancer （OR=4.843， 95%CI： 1.285‍ ‍—‍ ‍18.254， P<0.05）， and pancreatic CT value （OR=0.869， 95%CI： 0.806‍ ‍—‍ ‍0.937， P<0.05） were independent risk factors； based on the 2016 edition， the univariate analysis showed the diameter of the main pancreatic duct （χ2=5.391， P=0.020）， main pancreatic duct index （χ2=11.394， P=0.001）， intra-abdominal fat thickness （χ2=8.899， P=0.003）， marginal pancreatic thickness （t=2.665， P=0.009）， pancreatic CT value （t=-2.835， P=0.004） were closely associated with POPF， and the multivariate logistic regression analysis showed that main pancreatic duct index （OR=0.001， 95%CI： 0.000‍ ‍—‍ ‍0.050， P<0.05） and pancreatic CT value （OR=0.943， 95%CI： 0.894‍ ‍—‍ ‍0.994， P<0.05） were independent risk factors. A risk prediction model was established for POPF after PD， and the ROC curve analysis showed that this model had an area under the ROC curve of 0.788 （95%CI： 0.707‍ ‍—‍ ‍0.870） in the modeling group and 0.804 （95%CI： 0.675‍ ‍—‍ ‍0.932） in the validation group. ConclusionMain pancreatic duct index and pancreatic CT value are closely associated with POPF after PD， and the risk prediction model for pancreatic fistula based on the 2016 edition has a good prediction accuracy.

Complicaciones de cirugía de Whipple en un paciente pediátrico con tumor pseudopapilar de páncreas / Complications of Whipple procedure in a pediatric patient with pseudopapillary tumor of the pancreas

Las neoplasias de páncreas son una entidad poco frecuente en pediatría; el tumor pseudopapilar de páncreas (TSP) es el más comúnmente diagnosticado. Habitualmente, se localizan en la cabeza del páncreas. La cirugía de Whipple o pancreatoduodenectomía es la técnica elegida para el tratamiento de los tumores benignos o malignos de páncreas. Si bien la mortalidad conocida ha descendido en los últimos años, debido a la mayor experiencia de los cirujanos y al mejor cuidado pre- y posoperatorio, la morbilidad se ha mantenido elevada secundaria a las complicaciones asociadas. Dentro de estas se destacan retardo en el vaciamiento gástrico, colecciones intraabdominales, fístula pancreática, reestenosis del sitio quirúrgico y hemorragia pospancreatectomía. Se presenta el caso clínico de una niña de 13 años con diagnóstico de TSP que recibió tratamiento quirúrgico efectivo desde el punto de vista oncológico, pero que requirió una internación prolongada secundaria a las complicaciones quirúrgicas.

Pancreatic neoplasms are rare in pediatrics; the pseudopapillary tumor (PPT) of the pancreas is the most common. PPTs of the pancreas are usually located in the head of the pancreas. A pancreaticoduodenectomy or Whipple procedure is the technique of choice for the treatment of benign or malignant pancreatic tumors. Although mortality for this cause has decreased in recent years, due to the greater experience of surgeons and improved pre- and postoperative care, morbidity has remained high secondary to associated complications. These include delayed gastric emptying, intra-abdominal collections, pancreatic fistula, surgical site restenosis, and post-pancreatectomy hemorrhage. Here we describe the clinical case of a 13-year-old girl diagnosed with PPT of the pancreas who underwent an effective surgery in terms of cancer treatment, but who required a prolonged hospitalization secondary to surgical complications.

Octreotide and postoperative pancreatic fistula after pancreaticoduodenectomy: What we know so far? A narrative review

Postoperative pancreatic fistula (POPF) is the most feared complication following pancreatic resection. Octreotide, a synthetic somatostatin analog, has been widely used by pancreatic surgeons worldwide after pancreatic resections, often as per surgeon抯 discretion, to prevent POPF especially in cases at high risk of developing POPF. We herein analyze the data available till date of the subject. A PubMed search with keywords 搒omatostatin OR octreotide OR somatostatin analogues AND postoperative pancreatic fistula� was made. Further filters were applied in the search 揅linical Trial, Meta?Analysis, Randomized Controlled Trial, Systematic Review, from 1990 � 2021,� and the 68 results thus obtained were analyzed and included in this narrative review. There is considerable heterogeneity among the studies assessing the role of octreotide in the prevention of POPF making data comparison difficult, and hence results remain inconclusive. Most of the earlier studies used different definitions of POPF and other complications; included patients with varied pancreatic pathologies such as cancer, chronic pancreatitis, and benign lesions; surgical techniques such as pancreaticoduodenectomy, distal pancreatectomy, and other procedures; use of somatostatin and its analogs such as octreotide, lanreotide, pasireotide, and vapreotide; varied surgeon and institutional volume; and so on. Besides, pancreatic surgery is per se a complex surgical procedure and has its own inherent biases related to patient and the pancreas itself affecting the overall outcome. Data indicate favorable role of newer somatostatin analogs, and further studies are urgently needed. The question about the efficacy of prophylactic octreotide to reduce POPF after pancreaticoduodenectomy remains open to debate

Síndrome de desconexión del conducto pancreático

El síndrome del ducto pancreático desconectado (SDPD) consiste en la disrupción del ducto pancreático principal con pérdida de continuidad entre el remanente pancreático distal viable y el tracto gastrointestinal, generalmente causado por necrosis ductal secundaria a pancreatitis aguda grave. Esto resulta en fuga de fluido pancreático, provocando un curso de enfermedad prolongado y complicaciones. La literatura sobre este tema es limitada, con algoritmos de tratamiento poco claros. Hemos realizado una revisión de la literatura sobre el tema. Revisión en Pubmed y Scielo (2011-2021) de artículos en inglés y español utilizando términos «síndrome del conducto pancreático desconectado», «DPDS» y «páncreas desconectado» encontrando 16 artículos relevantes. Dadas las pocas citas, se revisaron las referencias de estos artículos. Finalmente, revisamos un total de 21 artículos. Entre las referencias encontradas existe 1 metaanálisis, 4 estudios prospectivos y no existen ensayos aleatorizados.

Disconnected pancreatic duct syndrome (DPDS) is characterized by disruption of the main pancreatic duct with a loss of continuity between the viable upstream pancreatic parenchyma and the gastrointestinal tract, generally caused by ductal necrosis after severe acute necrotizing pancreatitis. This compromised ductal integrity leads to extraductal leakage of pancreatic secretions, causing a prolonged disease course and complications. The existing literature is limited, with unclear therapeutic algorithms. We have performed a review of the literature on DPDS. Review in Pubmed and Scielo (2011-2021) of articles in English and Spanish using the terms "disconnected pancreatic duct syndrome", "DPDS" and "disconnected pancreas" finding 16 relevant articles. Given the few citations, the references of these articles was reviewed. Finally, we found 21 articles. Among them, there is one meta-analysis, 4 prospective studies and no randomized trials.

Alternative fistula risk score and first postoperative day drain fluid amylase as predictors of pancreatic fistula after pancreaticoduodenectomy / Escore alternativo de risco de fístula e níveis de amilase do fluido de drenagem no primeiro dia de pós-operatório como preditores de fístula pancreática após pancreaticoduodenectomia

ABSTRACT BACKGROUND: The high morbidity and mortality rates of pancreaticoduodenectomy are mainly associated with pancreaticojejunal anastomosis, the most fragile and susceptible to complications such as clinically relevant postoperative pancreatic fistula. AIMS: The alternative fistula risk score and the first postoperative day drain fluid amylase are predictors of the occurrence of clinically relevant postoperative pancreatic fistula. No consensus has been reached on which of the scores is a better predictor; moreover, their combined predictive power remains unclear. To the best of our knowledge, this association had not yet been studied. METHODS: This study assessed the predictive effect of alternative fistula risk score and/or drain fluid amylase on clinically relevant postoperative pancreatic fistula in a retrospective cohort of 58 patients following pancreaticoduodenectomy. The Shapiro-Wilk and Mann-Whitney tests were applied for assessing the distribution of the samples and for comparing the medians, respectively. The receiver operating characteristics curve and the confusion matrix were used to analyze the predictive models. RESULTS: The alternative fistula risk score values were not statistically different between patients in the clinically relevant postoperative pancreatic fistula and non- clinically relevant postoperative pancreatic fistula groups (Mann-Whitney U test 59.5, p=0.12). The drain fluid amylase values were statistically different between clinically relevant postoperative pancreatic fistula and non- clinically relevant postoperative pancreatic fistula groups (Mann-Whitney U test 27, p=0.004). The alternative fistula risk score and drain fluid amylase were independently less predictive for clinically relevant postoperative pancreatic fistula, compared to combined alternative fistula risk score + drain fluid amylase. CONCLUSION: The combined model involving alternative fistula risk score >20% + drain fluid amylase=5,000 U/L was the most effective predictor of clinically relevant postoperative pancreatic fistula occurrence following pancreaticoduodenectomy.

RESUMO RACIONAL: A alta morbimortalidade da pancreaticoduodenectomia está associada, principalmente, à anastomose pancreatojejunal, a mais frágil e suscetível a complicações como a fístula pancreática pós-operatória clinicamente relevante (clinically relevant postoperative pancreatic fistula - CR-POPF). OBJETIVOS: O escore alternativo de risco de fístula (alternative fistula risk score) e os níveis de amilase do fluido de drenagem no primeiro dia pós-operatório (first postoperative day drain fluid) são preditores da ocorrência de fístula pancreática pós-operatória clinicamente relevante. Nenhum consenso foi alcançado sobre qual das pontuações é um melhor preditor; além disso, seu poder preditivo combinado permanece obscuro. Até onde sabemos, essa associação ainda não havia sido estudada. MÉTODOS: Este estudo avaliou o efeito preditivo do escore alternativo de risco de fístula e/ou do fluido de drenagem no primeiro dia pós-operatório em uma coorte retrospectiva de 58 pacientes após pancreaticoduodenectomia. Os testes de Shapiro-Wilk e Mann-Whitney foram aplicados para avaliar a distribuição das amostras e para comparar as medianas, respectivamente. A curva de características operacionais do receptor e a matriz de confusão foram utilizadas para analisar os modelos preditivos. RESULTADOS: Os valores do escore alternativo de risco de fístula não foram estatisticamente diferentes entre os pacientes dos grupos fístula pancreática pós-operatória clinicamente relevante e não- fístula pancreática pós-operatória clinicamente relevante (teste U de Mann-Whitney 59,5, p=0,12). Os valores de fluido de drenagem no primeiro dia pós-operatório foram estatisticamente diferentes entre os grupos fístula pancreática pós-operatória clinicamente relevante e não- fístula pancreática pós-operatória clinicamente relevante (teste U de Mann-Whitney 27, p=0,004). O escore alternativo de risco de fístula e fluido de drenagem no primeiro dia pós-operatório foram independentemente menos preditivos para fístula pancreática pós-operatória clinicamente relevante, em comparação com escore alternativo de risco de fístula + fluido de drenagem no primeiro dia pós-operatório combinados. CONCLUSÕES: O modelo combinado envolvendo escore alternativo de risco de fístula>20% + fluido de drenagem no primeiro dia pós-operatório=5.000 U/L foi o preditor mais eficaz da ocorrência de fístula pancreática pós-operatória clinicamente relevante após pancreaticoduodenectomia.

The effect of abdominal visceral fat area on perioperative complications and pancreatic fistula in primary gastric carcinoma patients after laparoscopic assisted radical gastrectomy / 中华普通外科杂志

Objective:To study the effect of visceral fat area (VFA) on postoperative complications and pancreatic fistula in patients undergoing laparoscopic assisted radical gastrectomy for gastric careinoma.Methods:Clnical data of 214 primary gastric cancer patients undergoing laparoscopic assisted radical gastrectomy between Jan 2017 and Jan 2022 at the Department of General Surgery, Shouguang People's Hospital were retrospectively reviewed.Results:There were 85 patients in high VFA group and 129 patients in the low VFA group. The body mass index (25.1±3.4) kg/m 2 and visceral fat area (143.4±41.1) cm 2 in the high VFA group were higher than those in the low VFA group (21.2±2.9) kg/m 2 and visceral fat area (58.7±31.9) cm 2. The operative time was (228.3±53.1) min vs. (206.3±62.9) min ( t=5.538, P=0.017). The intraoperative blood loss was (264.6±173.6) ml vs. (213.9±156.2) ml ( t=3.373, P=0.035). The postoperative hospital stay was (12.5±4.0) d vs. (10.3±3.7) d ( t=7.781, P=0.013). Twenty-three cases developed postoperative complications in the high VFA group vs. 20 cases in the low VFA group ( χ2=4.261, P=0.039). Patients in the high VFA group had an incidence of clinically relevant pancreatic fistula of 10.6% vs. 3.1% in patients in the low VFA group ( χ2=5.034, P=0.038). Univariate and multivariate analysis of clinically relevant pancreatic fistulas in patients with different VFA groups showed that men ≥134.6 cm 2 and women ≥91.1 cm 2 with VFA and operative time ≥250 min were independent risk factors for the occurence of clinically relevant pancreatic fistulas after laparoscopic assisted radical gastrectomy. Conclusions:VFA increases the difficulty of laparoscopic-assisted radical gastrectomy, resulting in increased postoperative complications. VFA and operation time are independent risk factors for clinically relevant pancreatic fistula after radical gastrectomy for gastric cancer.

A modified Blumgart procedure in laparoscopic pancreaticoduodenectomy / 中华普通外科杂志

Objective:To evaluate A modified Blumgart pancreaticojejunostomy in laparoscopic pancreaticoduodenectomy.Methods:The clinical data of 81 patients undergoing laparoscopic pancreaticoduodenectomy in Zhengzhou University Affiliated Cancer Hospital from Jan 2019 to Jan 2022 were retrospectively analyzed. Among them, 26 patients underwent modified Blumgart anastomosis and 55 underwent conventional Blumgart anastomosis.The data of demographics, liver function, pancreatic texture, operational result and complications were compared between the two groups.Results:The preoperative data (body mass index, preoperative albumin, prealbumin, transaminase, total bilirubin) between two groups were comparable ( P>0.05). There was no significant difference in pancreatic texture, pancreatic duct diameter and intraoperative blood loss between the two groups ( P>0.05). The modified group had shorter total operation time ( P<0.05), shorter pancreaticojejunostomy time ( P<0.05), shorter postoperative hospital stay ( P<0.05). The incidence of total pancreatic fistula and biochemical fistula in the modified group were lower than those in the conventional group ( P<0.05). There was no significant difference in the incidence of B/C grade pancreatic fistula and bile leakage, postoperative bleeding, infection and delayed gastric emptying between the two groups ( P>0.05). Conlusions:The modified Blumgart pancreaticojejunostomy during laparoscopic pancreaticoduodenectomy is safe, easy to do and time saving. While the incidence of postoperative pancreatic fistula with clinical significance　and other major complications were similar to traditional Blumgart procedure.

Risk factors of pancreatic fistula after pancreaticoduodenectomy and pancreaticojejunostomy / 中华肝胆外科杂志

Objective:To analyze the risk factors of clinically-relevant postoperative pancreatic fistula (CR-POPF) after pancreaticoduodenectomy (PD) and penetrating pancreaticojejunostomy (PPJ).Methods:The clinical data of 108 patients who underwent PD and PPJ in the Department of Hepatobiliary Surgery of the First Affiliated Hospital of Wannan Medical College from January 2017 to October 2022 were analyzed retrospectively, including 65 males and 43 females, aged 65.5 (54.2, 72.0) years. The incidences of POPF, biliary fistula, abdominal bleeding and other related complications were reviewed. The related factors of CR-POPF were analyzed by univariate analysis, and the statistically significant factors were included in multivariate logistic regression analysis.Results:A total of 108 patients were successfully treated with PD, including laparoscopic PD in 76 cases (70.4%) and open PD in 32 cases (29.6%). PPJ was performed in PD, including the continuous fashion in 39 cases (36.1%), intermittent fashion in 49 cases (45.4%) and modified continuous fashion in 20 cases (18.5%). The operation time was 390.0 (314.0, 480.0) min, the intraoperative blood loss was 200.0 (100.0, 384.0) ml, the postoperative hospital stay was 12.0 (10.0, 15.0) d, and the incidence of POPF (grade B + C) was 11.1% (12/108). Body mass index, pancreatic CT value and pancreatic duct size were the significant factors of CR-POPF (all P<0.05). Multivariate logistic regression analysis showed that age ( OR=0.895, 95% CI: 0.822-0.975), pancreatic CT value ( OR=0.812, 95% CI: 0.698-0.946) and pancreatic duct size ( OR=0.457, 95% CI: 0.220-0.952) were risk factors of CR-POPF after PPJ (all P<0.05). Conclusion:PPJ is a safe method of pancreaticoenterostomy, and CR-POPF may be related to younger patients, lower pancreatic CT value and the smaller pancreatic duct size.

Analysis of pancreaticojejunostomy in laparoscopic pancreaticoduodenectomy / 中华肝胆外科杂志

Laparoscopic pancreaticoduodenectomy is an important surgical undertaking, mostly used for benign and malignant tumors in the pancreatic head and periampullary region. The postoperative pancreatic fistula is the main factor to cause death after pancreaticoduodenectomy, and pancreaticojejunostomy is an independent risk factor for pancreatic fistula. In order to reduce the incidence of pancreatic fistula, surgeons have proposed dozens of pancreaticojejunostomy, but so far there are no randomized trials proved which method of pancreaticojejunostomy is better than the others. This article reviews the methods and characteristics of different pancreaticojejunostomy in laparoscopic pancreaticoduodenectomy.

Application of single-layer with full thickness of duct-to-mucosa pancreaticojejunostomy in laparoscopic pancreaticoduodenectomy / 中华胰腺病杂志

Objective:To explore the clinical efficacy and safety of single-layer with full thickness of duct-to-mucosa pancreaticojejunostomy in laparoscopic pancreaticoduodenectomy.Methods:The clinical data of 45 patients who underwent laparoscopic pancreaticoduodenectomy with the procedures of single-layer with full thickness in Second Hospital of Hebei Medical University from Jan 2020 to Jan 2022 were retrospectively collected and compared with 45 matched patients with traditional two-layer pancreaticojejunostomy.Results:The laparoscopic pancreaticoduodenectomy procedures were successfully performed in all the 90 cases. The mean operation time (285.6±92.4 minutes) and the media pancreaticojejunostomy time 20(15, 35) minutes) of the single-layer with full thickness pancreaticojejunostomy group were shorter than those of the two-layer pancreaticojejunostomy group [the mean operation time: 317.0±85.5 minutes, the media pancreaticojejunostomy time: 46(30, 58) minutes] with significantly statistical differences (all P value<0.05). There were no significantly statistical differences on intraoperative blood loss, the postoperative complications or hospital stay between the two groups. Conclusions:Compared with traditional pancreaticojejunostomy, the single-layer with full thickness of duct-to-mucosa pancreaticojejunostomy is simple and safe, which has the advantage of easy manipulation and less time-consuming and can be recommended for laparoscopic procedures.

Application of a novel modified Blumgart anastomosis in laparoscopic pancreaticoduodenectomy / 中国医师进修杂志

Objective:To investigate the efficacy and safety of a novel modified Blumgart pancreaticojejunostomy in laparoscopic pancreaticoduodenectomy (LPD).Methods:Between May 2021 and January 2022, 13 successive cases from Lihuili Hospital Affiliated to Ningbo University who underwent LPD were enrolled in this retrospective study. The study retrospectively analyzed the demographic characteristics, perioperative outcomes, and pathological results of these cases.Results:Twenty patients underwent LPD success-fully and one required conversion to open surgery. The operative time was (308.6 ± 61.7) min. The duration for PJ was (26.7 ± 4.3) min. The estimated blood loss was (188.1 ± 94.2) ml. The postoperative hospital stay was (14.2 ± 3.5) d. There was one case of biochemical leakage and no case of grade B or grade C pancreatic fistula.Conclusions:The new method is safe, simple and feasible. The novel method could reduce the incidence of pancreatic fistula and other complications after LPD.

Prevention and management of pancreatic fistula after pancreatoduodenectomy with precise and comprehensive opinion / 中华消化外科杂志

Pancreaticoduodenectomy (PD) is a major operation of abdominal surgery, with high risk, complex operation, more complications and high mortality. Pancreatic fistula is the main cause of death after PD. Due to its complexity and obstinacy, pancreatic fistula has become the top challenge of pancreatic surgery. The authors review the relevant literature and summarize the prevention and management of pancreatic fistula after PD, such as the optimization strategies for pancreatic anastomosis, the use of external stents, prophylactic drains in surgical field, the applica-tion of somatostatin and its analogues, and whole-course nutrition management, based on the precise and comprehensive opinion, in order to provide reference for improving the prevention and treatment of pancreatic fistula after PD.

Research progress in the selection of pancreaticojejunostomy suture in pancreaticoduodenec-tomy / 中华消化外科杂志

Pancreaticoduodenectomy (PD) is the mainstay of treatment for periampullary space-occupying disease. The occurrence of pancreatic fistula after PD is still an unsolved clinical problem, which seriously affects the safety of surgery. Various methods have been reported in clinical practice to reduce the incidence of pancreatic fistula, such as improving pancreaticoenteric anastomosis, using biological sealants, applying somatostatin analogs, and continuous peritoneal irrigation, etc., but the incidence of pancreatic fistula remains at 5%-30%. There are many risk factors related to pancreatic fistula after PD, in which reasonable selection of suture materials is an important factor and also an important factor affecting the curative effect of surgery. The authors analyze the characteristics and shortcomings of various sutures used in PD, in order to provide help to improve the safety of surgery and reduce the incidence of pancreatic fistula after PD.

Application value of laparoscopic pancreatic tumor enucleation / 中华消化外科杂志

Objective:To investigate the application value of laparoscopic pancreatic tumor enucleation (LapEN).Methods:The retrospective and descriptive study was conducted. The clinical data of 47 patients who underwent LapEN in Second Hospital of Hebei Medical University from September 2016 to June 2022 were collected. There were 18 males and 29 females, aged (49±12)years. Observa-tion indicators: (1) surgical situations; (2) postoperative complications; (3) postoperative recovery; (4) follow-up. Measurement data with normal distribution were represented as Mean± SD, and measurement data with skewed distribution were represented as M( Q1, Q3) or M(range). Count data were described as absolute numbers. Results:(1) Surgical situations. All 47 patients underwent LapEN successfully, with the operation time as (135±19)minutes and the volume of intraoperative blood loss as 100(50,100)mL. (2) Postoperative complications. Of the 47 patients, there were 12 patients with postoperative pancreatic fistula, 3 patients with postoperative abdominal infection, 1 case with postoperative hemorrhage, 1 case with postoperative gastric emptying disorder. (3) Postoperative recovery. Of the 47 patients, there were 13 cases with pancreatic solid pseudopapillary neoplasm, 12 cases with insulinoma, 11 cases with pancreatic serous cystadenoma, 7 cases with pancreatic intraductal papillary mucinous neoplasm (branched type), 4 cases with pancreatic mucinous cyst-adenoma. The tumor diameter of 47 patients was 1.9(1.6,2.3)cm and all patients with R 0 resection. There was no patient with perioperative death in the 47 patients. The postoperative duration of hospital stay and total hospital expenses of 47 patients was (13±4)days and (6.8±1.2) ten thousand yuan, respectively. (4) Follow-up. All 47 patients were followed up for 14(range, 8?18)months. None of the 47 patients had new onset diabetes or situations required postoperative exocrine replacement therapy, and no patient died. Conclusion:LapEN is safe and feasible for patients with pancreatic benign tumor or low potential malignancy.

Construction and validation of a risk prediction model for pancreatic fistula after pancreaticoduodenectomy / 中华内分泌外科杂志

Objective:To investigate the risk factors of pancreatic fistula after pancreaticoduodenectomy and establish the risk graph model of pancreatic fistula.Methods:The clinical data of 147 patients undergoing pancreaticoduodenectomy from Jan. 2018 to Jan. 2021 in Department of Hepatobiliary Surgery of Northern Theater Command General Hospital were retrospectively analyzed. The independent risk factors for postoperative pancreatic fistula were determined by univariate and multivariate analysis, and the linear graph model for predicting individual pancreatic fistula was drawn. The area under the subject operating characteristic curve was used to evaluate the model differentiation, the calibration curve was used to evaluate the model calibration, and finally the clinical application value of the model was evaluated by the clinical decision curve (DCA) .Results:The incidence of pancreatic fistula was 38.1%, including grade B pancreatic fistula in 49 cases and Grade C pancreatic fistula in 7 cases. Univariate analysis showed that operation method, body mass index (BMI), pancreatic texture, pancreatic duct diameter and lesion location were the related factors for postoperative pancreatic fistula. Multivariate analysis showed that BMI>25 kg/m 2, pancreatic soft texture, pancreatic duct diameter ≤3 mm and non-pancreatic diseases were independent risk factors for postoperative pancreatic fistula. According to the results of multiple factors, a prediction model of the nomogram was drawn, and the area under the subject operating characteristic curve of the model was calculated as AUC=0.792 (95% CI: 0.718-0.867). The calibration curve was drawn through internal verification of re-sampling, and the fitting curve swung around the 45° reference line, showing a high calibration degree; Clinical decision curve (DCA) analysis showed that the threshold probability was between 15% and 75% for maximum net benefit. It had good clinical application value. Conclusions:BMI>25 kg/m 2, soft pancreas, pancreatic duct diameter ≤3 mm and non-pancreatic diseases are independent risk factors for pancreatic fistula after pancreaticoduodenectomy. The established line graph model has good predictive efficiency and can effectively predict the occurrence of postoperative pancreatic fistula.

Historical evolution of pancreatic fistula definition and current grading limitations and potential improvements / 国际外科学杂志

Pancreatic fistula is one of the most important complications after pancreatic surgery. The International Study Group on Pancreatic Fistula proposed the definition and classification of postoperative pancreatic fistula (POPF) in 2005 firstly, which has promoted the development of pancreatic surgery research. And the International Study Group on Pancreatic Surgery modified the POPF standard in 2016 and paid more attention to clinical relevance. The POPF is often used to evaluate anastomotic methods. However, this grading version is based on clinical outcomes, which more represents the comprehensive treatment effect than reflects the quality of pancreaticojejunostomy. Using the current POPF grading criteria for the purpose of improving anastomosis methods is not very accurate, so an indicator that only reflects anastomosis′ quality is needed for the comparison of various surgical methods. To avoid the influence of non-reconstruction elements on the incidence and degree of POPF, this research team prefer the total drainage fluid amylase(DFA)or the duration of high DFA. And in this way, the comparation among different anastomotic operations could be specific and objective, which further helps to find out an ideal method for pancreatic digestive tract reconstruction.

Prospective study on the effect of prophylactic octreotide administration in preventing pancreatic fistula after pancreatoduodenectomy / 中华胰腺病杂志

Objective:To evaluate the effect of prophylactic octreotide administration on pancreaticoduodenectomy (PD)associated postoperative pancreatic fistula (POPF), total complications, peri-operative death and postoperative in-hospital days.Methods:From January 2020 to August 2021, 148 patients who underwent PD in the Department of Biliary-Pancreatic Surgery in Ren Ji Hospital affiliated with School of Medicine of Shanghai Jiao Tong University were recruited into this single-center randomized control double-blinded clinical trial. Patients were randomly assigned into octreotide group ( n=74) and control group ( n=74). Octreotide group was subcutaneously injected with 0.1 mg (1 ml) octreotide after preoperative anesthesia, and was subcutaneously injected with the same dose every 8 hours for 5 days, with a total of 16 doses. Control group was injected with 1 ml normal saline in the same way, and relevant clinical data and indicators of the two groups were recorded. The primary endpoint was clinically relevant pancreatic fistula, and the secondary endpoints were total complications, perioperative death and postoperative in-hospital days. Univariate and multivariate logistic regression analysis were used to screen the risk factors of clinically related POPF after PD. Results:120 patients were finally enrolled, including 61 in octreotide group and 59 in control group. There were no significant differences on age, gender ratio, body mass index, preoperative surgery rate of jaundice reduction, preoperative major biochemical indicators, operation time, intraoperative blood loss, pancreatic duct diameter, pancreatic texture and pathological type composition ratio. The total incidence of clinical relevant POPF was 8.3%, and there were no significant differences on biochemical leakage (4.9% vs 8.5%, P=0.435), grade B fistula (4.9% vs 8.5%, P=0.435) and grade C fistula (1.6% vs 1.7%, P=0.981). The total complication incidence (24.5% vs 28.8%, P=0.601), perioperative mortality (0 vs 3.3%, P=0.147) and postoperative in-hospital days (20.6±11.1 d vs 19.5±12.2 d, P=0.633) were not significantly different between two groups. Univariate analysis showed that preoperative serum albumin level <30 g/L( P<0.001) and pathological type of pancreatic ductal adenocarcinoma ( P=0.036) were independent risk factors for POPF after PD, while multivariate analysis found no statistically significant risk factors. Conclusions:Octreotide can neither reduce the incidences of POPF, total complications and postoperative mortality, nor shorten postoperative in-hospital days. However, for patients with preoperative hypoproteinemia and (or) the pathological type of pancreatic duct adenocarcinoma, the prophylactic use of octreotide during PD and after PD may reduce the occurrence of POPF.

Application of Prolene thread-needle continuous suture method in pancreaticojejunostomy pancreaticoduodenectomy / 中国医师进修杂志

Objective:To investigate the application value of Prolene thread-needle continuous suture method in pancreaticojejunostomy pancreaticoduodenectomy.Methods:The clinical data of 80 patients with preoperative diagnosis of periampullary tumors undergoing pancreaticoduodenectomy who were admitted to Shanxian Central Hospital of Heze City from January 2017 to December 2020 were selected. According to the different methods of anastomosis, 80 patients were divided into A group and B group, each group with 40 patients, the patients in A group were performed pancreatic duct-mucosal anastomosis and the patients in B group were performed Prolene thread-needle continuous suture. The preoperative clinical data, operation-related data, postoperative complications in two groups were compared.Results:There were no statistically significant differences between the two groups in clinical data such as gender, age, albumin level, pancreatic duct diameter, combined underlying diseases, preoperative bilirubin, admission symptoms, preoperative biliary drainage and tumor location ( P>0.05).The operation time, intraoperative blood loss, postoperative drainage, operation durationand postoperative hospital stay in B group were lower than those in A group : (353.64 ± 95.28) min vs. (395.38 ± 110.29)min, (330.19 ± 100.27) ml vs. (397.43 ± 105.97) ml, (330.57 ± 110.68) ml vs. (376.18 ± 94.73) ml, (20.74 ± 8.08) min vs. (31.06 ± 7.83) min, (18.72 ± 6.02) d vs. (23.79 ± 7.41) d, the differences were statistically significant ( P<0.05). The incidence of complications such as pancreatic leakage, pancreatic fistula, abdominal infection, lung infection, biliary fistula and delayed gastric emptying in B group were lower than those in A group : 10.0%(4/40) vs. 20.0%(8/40), 7.5%(3/40) vs. 20.0%(8/40), 2.5%(1/40) vs. 12.5%(5/40), 0 vs. 7.5%(3/40), 5.0%(2/40)vs. 17.5%(7/40), 7.5%(3/40) vs. 17.5%(7/40), the differences were statistically significant ( P<0.05). Conclusions:Prolene thread-needle continuous suture method in pancreaticojejunostomy pancreaticoduodenectomy has the characteristics of simple operation, effective shortening of operation time, reliable anastomosisand can reduce the risk of postoperative pancreatic fistula complications.

Risk factors analysis and treatment of postpancreaticoduodenectomy hemorrhage / 中华消化外科杂志

Objective:To investigate the risk factors and treatment of postpancreatico-duodenectomy hemorrhage(PPH).Methods:The retrospective case-control study was conducted. The clinical data of 712 patients who underwent pancreaticoduodenectomy in Peking University First Hospital from January 2012 to November 2021 were collected. There were 392 males and 320 females, aged from 16 to 89 years, with a median age of 62 years. Observation indicators: (1) diagnosis of PPH; (2) analysis of influencing factors for PPH; (3) treatment of PPH. Measurement data with skewed distribution were represented as M(range). Count data were described as absolute numbers or percentages. Univariate analysis was performed using the chi-square test or Fisher exact probability, and multivariate analysis was performed using the Logistic regression model. Results:(1) Diagnosis of PPH. Of the 712 patients, 72 cases had PPH and 7 cases died. The incidence of PPH was 10.11%(72/712), and PPH related mortality was 9.72%(7/72). There were 7 cases of early PPH and 65 cases of delayed PPH. There were 23 cases of mild PPH and 49 cases of severe PPH. (2) Analysis of influencing factors for PPH. Results of univariate analysis showed that preoperative serum total bilirubin (TBil), extended surgery, postoperative pancreatic fistula, postoperative biliary fistula, postoperative abdominal infection were related factors for delayed PPH ( χ2=13.17, 3.93, 87.89, 22.77, 36.13, P<0.05). Results of multivariate analysis showed that preoperative serum TBil ≥171 μmol/L, postoperative grade B or C pancreatic fistula, postoperative biliary fistula, postoperative abdominal infection were independent risk factors for delayed PPH ( odds ratio=1.91, 8.10, 2.11, 2.42, 95% confidence interval as 1.09-3.33, 4.62-14.20, 1.06-4.23,1.35-4.31, P<0.05). (3) Treatment of PPH. ① Treatment of early PPH. Of the 7 cases with early PPH, 4 cases had mild PPH and 3 cases had severe PPH. The 4 cases with mild PPH were stanched by conservative treatment. The bleeding location of the 3 cases with severe PPH were the posterior wall of pancreatoenteric anastomosis, the pancreatic uncinate stump and the unintentional puncture of the jejunostomy tube of the left upper abdominal wall vessels and the 3 cases were stanched by reoperation. All the 7 cases were discharged without other complications. ② Treatment of delayed PPH. Of the 65 cases with delayed PPH, 19 cases had mild PPH and 46 cases had severe PPH. Of the 19 cases with mild PPH, 18 cases were stanched by conservative treatment including 2 cases died of pancreatic fistula and abdominal infection, 1 case were stanched by endoscope therapy. Of the 46 cases with severe PPH, 18 cases with stable vital signs and slow bleeding were stanched by conservative treatment including 1 case died of infectious toxic shock and the other 28 cases underwent invasive treatment, including 2 cases undergoing gastroscopy, 20 cases undergoing interventional treatment and 6 cases under-going reoperation as the initial treatment. Of the 22 cases taking endoscope or interventional treatment as the initial treatment, 5 cases underwent rebleeding and 2 cases died, with the reblee-ding rate and mortality as 22.7%(5/22) and 9.1%(2/22), respectively. Of the 6 cases taking reopera-tion as the initial treatment, 3 cases underwent rebleeding and 2 cases died, with the rebleeding rate and mortality as 3/6 and 2/6, respectively. There was no significant difference in the rebleeding rate and mortality in patients taking endoscope or interventional treatment as the initial treatment and patients taking reoperation as the initial treatment ( P>0.05). Of the 28 cases undergoing invasive treatment, 10 cases underwent secondary surgical treatment, including 6 cases taking reoperation and 4 cases taking interventional treatment as the initial treatment for hemorrhage, and 4 cases died with the mortality as 4/10, and the other 18 cases who did not receive secondary surgical treatment survived. There was a significant difference in the mortality between patients with or without secondary surgical treatment ( P<0.05). Conclusions:Preoperative serum TBil ≥171 μmol/L, post-operative grade B or C pancreatic fistula, postoperative biliary fistula, postoperative abdominal infection are independent risk factors for delayed PPH. Surgical treatment should be performed decisively for early severe PPH. For delayed severe PPH patients who undergoing conservative treat-ment without effect, endoscope therapy and interventional treatment should be the first choice, and surgical treatment should be performed if those above procedures not working.