Pancreaticojejunostomy versus pancreaticogastrostomy reconstruction after pancreaticoduodenectomy for pancreatic or periampullary tumours: a multicentre randomised trial

Duct-to-Mucosa vs Invagination for Pancreaticojejunostomy after Pancreaticoduodenectomy: A Prospective, Randomized Controlled Trial from a Single Surgeon

BACKGROUND

Pancreatic fistula (PF) is the most common significant complication after pancreaticoduodenectomy. Invagination and duct-to-mucosa anastomoses are anastomotic techniques that are commonly performed after pancreaticoduodenectomy. There are conflicting data on invagination vs duct-to-mucosa anastomoses about which is superior for minimizing the risk of PF. In addition, all previous studies involved multiple operating surgeons and failed to control for variation in surgeon expertise.

STUDY DESIGN

This was a randomized controlled study comparing the outcomes of PD between patients who underwent invagination vs those who had duct-to-mucosa anastomoses. All 132 patients were operated on between October 2012 and March 2015 by a single surgeon experienced in both procedures. Pancreatic fistula was the main end point.

RESULTS

Overall and clinically relevant rates of PF rate were 29.5% and 10.6%, respectively. Overall PF rates in the patients treated with invagination vs duct-to-mucosa anastomoses were 30.9% vs 28.5% (p = 0.729), respectively and the corresponding clinically relevant PF rates were 17.6% vs 3.1%, respectively (p = 0.004). Although the overall complication rates were similar in the 2 groups, severe complications were significantly more frequent in the patients treated with invagination (p = 0.013). Duct-to-mucosa anastomosis was also associated with shorter postoperative hospital stay (13 vs 15 days; p = 0.021). There was one perioperative death. Independent variables for the risk of PF were the diameter of the pancreatic duct (greater risk with smaller diameter), the underlying pathology, and male sex.

CONCLUSIONS

Both methods yield similar overall rates for PF, but the rate of clinically relevant PF is lower in patients treated with duct-to-mucosa anastomosis. Additional single-surgeon studies or multi-institution randomized trials controlling for comparable expertise in both procedures should be conducted to confirm these results.

Pancreatic Fistula and Delayed Gastric Emptying After Pancreatectomy: Where do We Stand?

Pancreatic resection has become a feasible treatment of pancreatic neoplasms, and with improvements in surgical techniques and perioperative management, mortality associated with pancreatic surgery has decreased considerably. Despite this improvement, a high rate of complications is still associated with these procedures. Among these complications, delayed gastric emptying (DGE) and postoperative pancreatic fistula (POPF) have a substantial impact on patient outcomes and burden our healthcare system. Technical modifications and postoperative approaches have been proposed to reduce rates of both POPF and DGE in patients undergoing pancreatectomy; however, to date, their rates have remained unchanged. In the present study, we summarize the findings of the most significant studies that have investigated these complications. In particular, several studies focused on technical modifications including extent of dissection, stent placement, nature of anastomosis, type of reconstruction, and application of biological or non-biological agents to site of anastomosis. Moreover, postoperatively, drain placement, duration of drain usage, postoperative feeding, and use of pharmacological agents were studied to reduce rates of POPF and DGE. In this review, we summarize the most relevant literature on this fundamental aspect of pancreatic surgery. Despite studies identifying the potential benefit of technical modifications and postoperative approaches, these findings remain controversial and suggest need for further extensive investigation. Most importantly, we recommend that all surgeons performing these procedures base their practice on the most updated and highest available level of evidence.

Surgery for Pancreatic and Periampullary Carcinoma

Surgical resection for pancreatic and periampullary cancer has evolved over several decades. The postoperative mortality for these resections has declined to less than 5 %. However, morbidity associated with these resections is still considerable. Various technical modifications like pylorus preservation, reconstruction techniques and methods to perform pancreaticoenteric anastomosis have been suggested to improve postoperative outcomes after pancreaticoduodenectomy. Surgical modifications to improve oncological clearance and decrease fistula rates after distal pancreatic resections have also been suggested. Dilemma still exists whether interventions like pancreatic duct stents, octreotide and drains help to improve postoperative outcomes. The role of extended lymph node dissection and extended resections for pancreatic and periampullary cancer is still controversial, as is the management of borderline resectable pancreatic cancer. In this review, we discuss the literature pertaining to various surgical aspects of pancreatic and periampullary carcinoma.

Duct-to-Mucosa Versus Invagination Pancreaticojejunostomy Following Pancreaticoduodenectomy: a Systematic Review and Meta-Analysis

BACKGROUND

Postoperative pancreatic fistula (POPF) is one of the most common complications after pancreaticoduodenectomy (PD). The ideal choice of pancreaticojejunostomy (PJ) anastomosis remains a matter of debate.

METHODS

A meta-analysis of randomized controlled trials (RCTs) comparing duct-to-mucosa with invagination PJ following PD was performed. Pooled odds ratio (OR) with 95 % confidence intervals (CI) were calculated using fixed-effects or random-effects models.

RESULTS

In total, five RCTs involving 654 patients were included. Meta-analysis revealed no significant difference in POPF rate between the duct-to-mucosa and invagination PJ techniques (OR = 1.23, 95 % CI = 0.78-1.93; P = 0.38). Two of five trials applied the POPF definition proposed by the International Study Group of Pancreatic Surgery (ISGPS). Using this definition, the incidence of clinically relevant POPF was lower in patients undergoing invagination PJ than in those undergoing duct-to-mucosa PJ (OR = 2.94, 95 % CI = 1.31-6.60; P = 0.009). There was no significant difference in terms of delayed gastric emptying, intra-abdominal collection, overall morbidity and mortality, reoperation rate, and length of hospital stay between the two groups.

CONCLUSION

Invagination PJ is not superior to duct-to-mucosa PJ in terms of POPF and other complications but appears to reduce clinically relevant POPF. Further well-designed RCTs that use ISGPS definition are still required before strong evidence-based recommendations can be formulated.

Identification of risk factors for pancreatic exocrine insufficiency after pancreaticoduodenectomy using a 13C-labeled mixed triglyceride breath test

BACKGROUND

There are only a few reports concerning long-term exocrine function after pancreaticoduodenectomy (PD), although the number of long-term survivors has increased. We assessed pancreatic exocrine function after PD in 189 patients to identify risk factors for pancreatic exocrine insufficiency.

METHODS

We evaluated patients' exocrine function by using the (13)C-labeled mixed triglyceride breath test, a noninvasive test feasible in outpatient service units. The present study included 99 patients that underwent pancreaticojejunostomy (PJ) at Wakayama Medical University Hospital and 90 patients that underwent pancreaticogastrostomy (PG) at Hiroshima University Hospital, the standard reconstruction techniques during PD at the respective hospitals. We also analyzed long-term morphological changes of remnant pancreas by computed tomography (main pancreatic duct dilation and parenchymal atrophy), nutritional status, and endocrine function.

RESULTS

Independent risk factors for exocrine insufficiency after PD include hard pancreas (P = 0.003, odds ratio; 3.157) and PG reconstruction (P = 0.040, odds ratio; 2.321). Breath test results correlated significantly with post-operative morphological changes, nutritional status, and endocrine function. Atrophic changes of the remnant pancreas in the PG group were more severe than those in the PJ group. Furthermore, for patients with a soft pancreas, postoperative body weight changes, prognostic nutritional index, serum total protein levels as well as exocrine test were worse in the PG group, compared with the PJ group.

CONCLUSIONS

Our results showed that PJ reconstruction might be superior to PG during PD, from the viewpoint of long-term pancreatic exocrine function, although further prospective studies are needed.

Emergency management in patients with late hemorrhage after pancreatoduodenectomy for a periampullary tumor

BACKGROUND

The mortality rate due to late hemorrhage after surgery for periampullary tumors is high, especially in patients with anastomotic leakage. Patients usually require emergency intervention for late hemorrhage. In this study patients with late hemorrhage and their outcomes were analyzed. Furthermore, independent predictors for late hemorrhage, the need for emergency intervention, and type of intervention are reported.

METHODS

From a prospective database that includes 1,035 patients who underwent pancreatoduodenectomy for periampullary tumors between 1992 and 2012, patients with late hemorrhage (>24 h after index operation) were identified. Patient, disease-specific, and operation characteristics, type of intervention, and outcomes were analyzed. Emergency intervention was defined as surgical or radiological intervention in hemodynamically unstable patients.

RESULTS

Of the 47 patients (4.5 %) with late hemorrhage, pancreatic fistula was an independent predictor for developing late hemorrhage (OR 10.2). The mortality rate in patients with late hemorrhage was 13 % compared with 1.5 % in all patients without late hemorrhage. Twenty patients required emergency intervention; 80 % underwent primary radiological intervention and 20 % primary surgical intervention. Extraluminal location of the bleeding (OR 5.6) and occurrence of a sentinel bleed (OR 6.6) are indications for emergency intervention.

CONCLUSION

The type of emergency intervention needed for late hemorrhage is unpredictable. Radiological intervention is preferred, but if it fails, immediate change to surgical treatment is mandatory. This can be difficult to manage but possible when both radiological and surgical interventions are in close proximity such as in a hybrid operating room and should be considered in the emergency management of patients with late hemorrhage.

Outcomes of pancreatogastrostomy with gastric partition after pylorus-preserving pancreaticoduodenectomy with gastric partition

INTRODUCTION

Pylorus-preserving pancreatoduodenectomy with gastric partition (PPPD-GP) seems to be associated to a better postoperative outcome than conventional pancreaticojejunostomy in the setting of a prospective-randomized study. The aim of this study is to further evaluate the surgical outcome in a series of 129 consecutive patients.

METHODS

Between 2007 and June 2013, 129 patients with periampullary tumors surgically treated with PPPD-GP were retrospectively analyzed. Surgical complications (Clavien-Dindo score), as well as pancreatic and non-pancreas related complications were analyzed.

RESULTS

Overall postoperative complication rate was 77%, although 50% of complications were graded I-II by the Clavien-Dindo classification. Incidence of clinically relevant pancreatic fistula was 18%: ISGFP type B: 12%, and type C: 6%. Other pancreas specific complications such as delayed gastric emptying and pospancreatectomy haemorrhage were 27 and 15%, respectively, similar to results published in the literature. Overall perioperative mortality rate was 4.6%.

CONCLUSION

PPPD-GP results show that it is a technique with an acceptable morbidity, low mortality and pancreatic fistula rate similar to other techniques currently described of pancreaticoenteric reconstruction.

Pancreaticogastrostomy after Pancreaticoduodenectomy Using Twin Square Wrapping with Duct-to-Mucosa Anastomosis

Background/Purpose: This study aimed to evaluate the feasibility and safety of a novel pancreaticogastrostomy technique for diminishing pancreatic fistulas after pancreaticoduodenectomy using gastric wrapping of the pancreatic stump with a twin square-shaped horizontal mattress and a suture fixing the main pancreatic duct to the gastric mucosa anastomosis [twin square wrapping (TSW) method]. Methods: Fifty-three patients undergoing pancreaticogastrostomy after pancreaticoduodenectomy were included in the study and chronologically divided into a conventional group (n = 32) and a TSW group (n = 21). The perioperative factors and the postoperative outcomes were retrospectively analyzed. Results: The operating time for the pancreatic anastomosis, the total operating time, and the blood loss volume in the TSW group were lower than in the conventional group, but without a statistically significant difference. The TSW group had a significantly lower postoperative white blood cell count and C-reactive protein level, with a reduced intra-abdominal fluid accumulation as assessed by computed tomography on postoperative day 7, had a lower incidence of postoperative complications and pancreatic fistulas, and achieved a shorter duration of drain placement and shorter postoperative hospital stays as compared to the conventional group. Conclusions: The TSW technique should be considered for reducing pancreatic fistulas by diminishing the postoperative inflammatory response and improving patient outcomes without increasing the operating time.

Canadian practice patterns for pancreaticoduodenectomy

BACKGROUND

Discordant practice patterns may be a consequence of evidence-practice gaps or deficiencies in knowledge translation. We examined the current strategies used by hepato-pancreatico-biliary (HPB) surgeons in Canada for the perioperative management of pancreaticoduodenectomy (PD).

METHODS

We generated a web-based survey that focused on the perioperative measures surrounding PD. The survey was distributed to all members of the Canadian Hepato-Pancreatico-Biliary Association.

RESULTS

The survey was distributed to 74 surgeons and received a response rate of 50%. Many similarities in surgical techniques were reported; for example, most surgeons (86.5%) reconstruct the pancreas with pancreaticojejunostomy rather than pancreaticogastrostomy. In contrast, variable techniques regarding the use of peritoneal drainage tubes, anastomotic stents, octreotide and other intraoperative modalities were reported. Most surgeons (75.7%) reported that their patients frequently required preoperative biliary drainage, yet there was minimal agreement with the designated criteria. There was variability in postoperative care, including the use of epidural analgesia and timing of postoperative oral nutrition.

CONCLUSION

We identified heterogeneity among Canadian HPB surgeons, suggesting a number of evidence-practice gaps within specific domains of pancreatic resections. Focused research in these areas may facilitate technical agreement and improve patient outcomes following PD.

Pancreaticogastrostomy is superior to pancreaticojejunostomy for prevention of pancreatic fistula after pancreaticoduodenectomy: an updated meta-analysis of randomized controlled trials

OBJECTIVE

To review prospective randomized controlled trials to determine whether pancreaticogastrostomy (PG) or pancreaticojejunostomy (PJ) is associated with lower risks of mortality and pancreatic fistula after pancreaticoduodenectomy (PD).

BACKGROUND

Previous studies comparing reconstruction by PG and PJ reported conflicting results regarding the relative risks of mortality and pancreatic fistula after these procedures.

METHODS

MEDLINE, the Cochrane Trials Register, and EMBASE were searched for prospective randomized controlled trials comparing PG and PJ after PD, published up to November 2013. Meta-analysis was performed using Review Manager 5.0.

RESULTS

Seven trials were selected, including 562 patients who underwent PG and 559 who underwent PJ. The pancreatic fistula rate was significantly lower in the PG group than in the PJ group (63/562, 11.2% vs 84/559, 18.7%; odds ratio = 0.53; 95% confidence interval, 0.38-0.75; P = 0.0003). The overall mortality rate was 3.7% (18/489) in the PG group and 3.9% (19/487) in the PJ group (P = 0.68). The biliary fistula rate was significantly lower in the PG group than in the PJ group (8/400, 2.0% vs 19/392, 4.8%; odds ratio = 0.42; 95% confidence interval, 0.18-0.93; P = 0.03).

CONCLUSIONS

In PD, reconstruction by PG is associated with lower postoperative pancreatic and biliary fistula rates.

In search of the best reconstructive technique after pancreaticoduodenectomy: pancreaticojejunostomy versus pancreaticogastrostomy

BACKGROUND

It has been suggested that pancreaticogastrostomy (PG) is a safer reconstruction than pancreaticojejunostomy (PJ), resulting in lower morbidity, including lower pancreatic leak rates and decreased postoperative mortality. We compared PJ and PG after pancreaticoduodenectomy (PD).

METHODS

A randomized clinical trial was designed. It was stopped with 50% accrual. Patients underwent either PG or PJ reconstruction. The primary outcome was the pancreatic fistula rate, and the secondary outcomes were overall morbidity and mortality. We used the Student t, Mann-Whitney U and χ(2) tests for intention to treat analysis. The effect of randomization, American Society of Anesthesiologists score, soft pancreatic texture and use of pancreatic stent on overall complications and fistula rates was calculated using logistic regression.

RESULTS

Our trial included 98 patients. The rate of pancreatic fistula formation was 18% in the PJ and 25% in the PG groups (p = 0.40). Postoperative complications occurred in 48% of patients in the PJ and 58% in the PG groups (p = 0.31). There were no significant predictors of overall complications in the multivariate analysis. Only soft pancreatic gland predicted the occurrence of pancreatic fistula (odds ratio 5.89, p = 0.003).

CONCLUSION

There was no difference in the rates of pancreatic leak/fistula, overall complications or mortality between patients undergoing PG and and those undergoing PJ after PD.

Pathophysiology after pancreaticoduodenectomy

Pancreaticoduodenectomy (PD) will result in removal of important multiorgans in upper intestinal tract and subsequently secondary physiologic change. In the past, surgeons just focused on the safety of surgical procedure; however, PD is regarded as safe and widely applied to treatment of periampullary lesions. Practical issues after PD, such as, effect of duodenectomy, metabolic surgery-like effect, alignment effect of gastrointestinal continuity, and non-alcoholic fatty liver disease were summarized and discussed.

A novel pancreaticogastrostomy method using only two transpancreatic sutures: early postoperative surgical results compared with conventional pancreaticojejunostomy

Purpose

To evaluate the surgical outcomes of pancreaticogastrostomy (PG) using two transpancreatic sutures with a buttress method through an anterior gastrostomy (PGt), and compare these results with our previous experience with pancreaticojejunostomy (PJ) including the dunking and duct to mucosa methods after pancreaticoduodenectomy (PD).

Methods

In this study, 171 patients who had undergone PD between January 2005 and April 2013 were classified into three groups according to the method of the pancreaticoenteric anastomosis: dunking PJ (PJu group; n = 67, 39.1%), duct to mucosa PJ (PJm group; n = 41, 23.9%), and PGt (PGt group; n = 63, 36.8%). We retrospectively analyzed patient characteristics, perioperative outcomes, and surgical results.

Results

Both groups had comparable demographics and pathology, and there were no significant differences in operative time, estimated blood loss, or postoperative hospital stay. Within the two groups, morbidities occurred in 49 cases (10.7%), and were not significantly different between the two groups, excepting postoperative pancreatic fistula (POPF). The PGt group had a lower rate of POPF (18/63, 28.6%) than the PJu and PJm groups (21/67, 31.3% and 19/41, 46.3%; P = 0.048), especially in terms of grades B and C POPF (4/63 [6.3%] in the PGt group vs. 7/67 [10.4%] in the PJu group and 9/41 [22.0%] in the PJm group, P = 0.049).

Conclusion

The PGt method showed feasible outcomes for POPF and had advantages over dunking PJ and duct to mucosa PJ with respect to immediate postoperative results. PGt may be a promising technique for pancreaticoenteric anastomosis after PD.

[Surgery for pancreatic cancer: Evidence-based surgical strategies]

Pancreatic cancer surgery represents a challenge for surgeons due to its technical complexity, the potential complications that may appear, and ultimately because of its poor survival. The aim of this article is to summarize the scientific evidence regarding the surgical treatment of pancreatic cancer in order to help surgeons in the decision making process in the management of these patients .Here we will review such fundamental issues as the need for a biopsy before surgery, the type of pancreatic anastomosis leading to better results, and the need for placement of drains after pancreatic surgery will be discussed.

Effect of Billroth II or Roux-en-Y Reconstruction for the Gastrojejunostomy After Pancreaticoduodenectomy: Meta-analysis of Randomized Controlled Trials

BACKGROUND AND OBJECTIVES

This study aimed to compare Billroth II with Roux-en-Y reconstruction after pancreaticoduodenectomy (PD).

METHODS

A literature search was carried out to identify all randomized controlled trials (RCTs) comparing postoperative complications of Billroth II versus Roux-en-Y reconstruction following PD published from 1 January 1990 to 31 August 2014. Pooled risk ratios (RRs) with 95 % confidence intervals (CIs) were calculated using fixed effects or random effects models

RESULTS

In total, three RCTs with 470 patients were included. Using International Study Group of Pancreatic Surgery (ISGPS) definitions, incidences of delayed gastric emptying (DGE) [grades B and C (3.9 versus 12.9 %; RR 0.30, 95 % CI 0.11-0.79; P = 0.01), DGE grade C (0.7 versus 9.6 %; RR 0.11, 95 % CI 0.02-0.61; P = 0.01)] were significantly lower in the Billroth II group than in the Roux-en-Y group, as was the length of hospital stay (weighted mean difference -4.72, 95 % CI -8.91, -0.53; P = 0.03).

CONCLUSIONS

Meta-analysis revealed that the incidence of DGE (grades B and C) after PD can be decreased by using Billroth II rather than Roux-en-Y reconstruction.

Meta-analysis of pancreaticogastrostomy versus pancreaticojejunostomy on occurrences of postoperative pancreatic fistula after pancreaticoduodenectomy

BACKGROUND/OBJECTIVE

Pancreatic fistula (PF) is the most common and challenging complication after pancreaticoduodenectomy (PD). This meta-analysis aimed to evaluate the impact of pancreaticogastrostomy (PG) versus pancreaticojejunostomy (PJ) on occurrences of postoperative PF.

METHODS

A systematic literature search in the Medline, EMBASE, OVID, and Cochrane databases was performed to identify all eligible randomized controlled trials (RCTs). Pooled estimates were presented with 95% confidence intervals (CI).

RESULTS

Six RCTs involving 1005 patients met the inclusion criteria. The incidence of PF [odds ratio (OR) 0.58, 95% CI, 0.42-0.81; p = 0.001], intra-abdominal abscess or collections (OR 0.43, 95% CI, 0.28-0.65; p < 0.001), and biliary fistula (OR 0.28, 95% CI, 0.11-0.74; p = 0.01) were found to be significantly lower in the PG group than in the PJ group. There was no significant difference in overall morbidity, other complications, hospital mortality, or length of hospital stay between the two groups.

CONCLUSION

The meta-analysis showed that PG following PD represents a safe procedure associated with fewer PFs compared with PJ.

Body Surface Area: A new predictive factor of mortality and pancreatic fistula after pancreaticoduodenectomy: A cohort-study

INTRODUCTION

To assess the role of Body Surface Area (BSA) in predicting pancreatic fistula and mortality after pancreaticoduodenectomy.

METHODS

The data of patients who underwent pancreaticoduodenectomy between January 1992 to December 2012 at the University Hospital of Caen were collected prospectively and analyzed retrospectively. Pancreatic fistula was determined according to the ISPGF (International Study Group for Pancreatic Fistula) criteria. The Clavien and Dindo classification was used for grading post-operative complications and BSA was calculated according to the Boyd formula. Patients were classified as "large" and "non-large" using a BSA value ≥1.82 to define the large group and the non-large group. The primary end points were post-operative mortality rate, and the rate and grade of post-operative pancreatic fistula.

RESULTS

411 patients underwent pancreaticoduodenectomy with a mean age of 61.2 (±12.1) year. Six patients (1.45%) died post-operatively. Patients with a BSA ≥1.82 had a significantly higher risk of post-operative death: OR 3.55 [1.43-8.80] (p < 0.0005). Eighty-five patients (20.7%) developed a post-operative pancreatic fistulas. The grade A pancreatic fistula rate was 87.1%. Patients with a BSA ≥1.82 had a significantly higher risk of developing overall post-operative pancreatic fistula (p < 0.038). Multivariate analysis showed that "large" patients (1.86, 95%CI[1.09-3.92], p = 0.0229), soft pancreas (6.5, 95%CI[2.39-9.31], p = 0.0155) and a BMI ≥ 25 (1.09, 95%CI[1.031-1.163], p = 0.0407) were independent risk factors of pancreatic fistula.

CONCLUSION

Body Surface Area is a useful factor after pancreaticoduodenectomy to predict mortality and post-operative fistula.

Risk factors and outcomes of postoperative pancreatic fistula after pancreatico-duodenectomy: an audit of 532 consecutive cases

BACKGROUND

Pancreatic fistula (PF) remains the most challenging complication after pancreaticoduodenectomy (PD). The purpose of this study was to identify the risk factors of PF and delineate its impact on patient outcomes.

METHODS

We retrospectively reviewed clinical data of 532 patients who underwent PD and divided them into PF group and no PF group. Risk factors and outcomes of PF following PD were examined.

RESULTS

PF was found in 65 (12.2%) cases, of whom 11 were classified into ISGPF grade A, 42 grade B, and 12 grade C. Clinically serious postoperative complications in the PF versus no PF group were mortality, abdominal bleeding, bile leak, intra-abdominal abscess and pneumonia. Univariate and multivariate analysis showed that blood loss ≥ 500 ml, pancreatic duct diameter ≤ 3 mm and pancreaticojejunostomy type were independent risk factors of PF after PD.

CONCLUSIONS

Blood loss ≥ 500 ml, pancreatic duct diameter ≤ 3 mm and pancreatico-jejunostomy type were independent risk factors of PF after PD. PF was related with higher mortality rate, longer hospital stay, and other complications.

Positive regulatory effects of perioperative probiotic treatment on postoperative liver complications after colorectal liver metastases surgery: a double-center and double-blind randomized clinical trial

BACKGROUND

Colorectal liver metastases (CLM) occur frequently and postoperative intestinal infection is a common complication. Our previous study showed that probiotics could decrease the rate of infectious complications after colectomy for colorectal cancer. To determine the effects of the perioperative administration of probiotics on serum zonulin levels which is a marker of intestinal permeability and the subsequent impact on postoperative infectious complications in patients with CLM.

METHODS

150 patients with CLM were randomly divided into control group (n = 68) and probiotics group (n = 66). Probiotics and placebo were given orally for 6 days preoperatively and 10 days postoperatively to control group and probiotics group respectively. We used the local resection for metastatic tumor ,while for large tumor, the segmental hepatectomy. Postoperative outcome were recorded. Furthermore, complications in patients with normal intestinal barrier function and the relation with serum zonulin were analyzed to evaluate the impact on the liver barrier dysfunction.

RESULTS

The incidence of infectious complications in the probiotics group was lower than control group. Analysis of CLM patients with normal postoperative intestinal barrier function paralleled with the serum zonulin level. And probiotics could also reduce the concentration of serum zonulin (P = 0.004) and plasma endotoxin (P < 0.001).

CONCLUSION

Perioperative probiotics treatment could reduce the serum zonulin level, the rate of postoperative septicemia and maintain the liver barrier in patients undergoing CLM surgery. we propose a new model about the regulation of probiotics to liver barrier via clinical regulatory pathway. We recommend the preoperative oral intake of probiotics combined with postoperative continued probiotics treatment in patients who undergo CLM surgery.

TRIAL REGISTRATION

ChiCTR-TRC- 12002841 . 2012/12/21.

Continuous suture of the pancreatic stump and Braun enteroenterostomy in pancreaticoduodenectomy

AIM: To investigate a new modification of pancreaticoduodenectomy (PD)-a mesh-like running suturing of the pancreatic remnant and Braun’s enteroenterostomy.

METHODS: Two hundred and three patients underwent PD from 2009 to 2014 and were classified into two groups: Group A (98 patients), who received PD with a mesh-like running suturing for the pancreatic remnant, and Braun’s enteroenterostomy; and Group B (105 patients), who received standard PD. Demographic data, intraoperative findings, postoperative morbidity and perioperative mortality between the two groups were compared by univariate and multivariate analysis.

RESULTS: Demographic characteristics between Group A and Group B were comparable. There were no significant differences between the two groups concerning perioperative mortality, and operative blood loss, as well as the incidence of the postoperative morbidity, including reoperation, bile leakage, intra-abdominal fluid collection or infection, and postoperative bleeding. Clinically relevant postoperative pancreatic fistula (POPF) and delayed gastric emptying (DGE) were identified more frequently in Group B than in Group A. Technique A (PD with a mesh-like running suturing of the pancreatic remnant and Braun’s enteroenterostomy) was independently associated with decreased clinically relevant POPF and DGE, with an odds ratio of 0.266 (95%CI: 0.109-0.654, P = 0.004) for clinically relevant POPF and 0.073 (95%CI: 0.010-0.578, P = 0.013) for clinically relevant DGE.

CONCLUSION: An additional mesh-like running suturing of the pancreatic remnant and Braun’s enteroenterostomy during PD decreases the incidence of postoperative complications and is beneficial for patients.

The impact of pancreaticojejunostomy versus pancreaticogastrostomy reconstruction on pancreatic fistula after pancreaticoduodenectomy: meta-analysis of randomized controlled trials

BACKGROUND

Pancreatic fistula (PF) remains a common source of morbidity following pancreaticoduodenectomy (PD). Despite numerous studies, the optimal method of pancreatic remnant reconstruction is controversial. This study examines the hypothesis that pancreaticogastrostomy (PG) is associated with a lower risk for PF after PD compared with pancreaticojejunostomy (PJ).

METHODS

Five electronic databases and the grey literature were searched for randomized controlled trials (RCTs) comparing PJ and PG after PD. Two reviewers independently selected studies, extracted data and assessed methodology. The primary outcome was the occurrence of PF of International Study Group on Pancreatic Fistula (ISGPF) Grade B or C.

RESULTS

Four RCTs including 676 patients were included. Pancreaticogastrostomy reduced the risk for PF [relative risk (RR) 0.41, 95% confidence interval (CI) 0.21-0.62] without any difference between high- and low-risk patients. Absolute risk reduction for PF was 4% (95% CI 2.4-5.6) in low-risk patients compared with 10% (95% CI 6.5-14.8) in high-risk patients undergoing PG rather than PJ. The strength of evidence for PF outcome was moderate according to the GRADE classification.

CONCLUSIONS

Reconstruction by PG decreases the rate of PF in comparison with PJ. Surgeons should consider reconstructing the pancreatic remnant following PD with PG, particularly in patients at high risk for PF.

Pancreaticogastrostomy is associated with significantly less pancreatic fistula than pancreaticojejunostomy reconstruction after pancreaticoduodenectomy: a meta-analysis of seven randomized controlled trials

OBJECTIVES

This study aimed to compare pancreaticojejunostomy (PJ) with pancreaticogastrostomy (PG) after pancreaticoduodenectomy (PD).

METHODS

A literature search of PubMed and the Cochrane Central Register of Controlled Trials for studies comparing PJ with PG after PD was conducted. The primary outcome for meta-analysis was pancreatic fistula. Secondary outcomes were morbidity, mortality, biliary fistula, intra-abdominal fluid collection, hospital length of stay (LoS), postoperative haemorrhage and reoperation. Outcome measures were odds ratios (ORs) and mean differences with 95% confidence intervals (CIs).

RESULTS

Seven recent RCTs encompassing 1121 patients (559 PJ and 562 PG cases) were involved in this meta-analysis. Incidences of pancreatic fistula (10.6% versus 18.5%; OR 0.52, 95% CI 0.37-0.74; P = 0.0002), biliary fistula (2.3% versus 5.7%; OR 0.42, 95% CI 0.03-3.15; P = 0.03) and intra-abdominal fluid collection (8.0% versus 14.7%; OR 0.50, 95% CI 0.34-0.74; P = 0.0005) were significantly lower in the PG than the PJ group, as was hospital LoS (weighted mean difference: -1.85, 95% CI -3.23 to -0.47; P = 0.008). Subgroup analysis indicated that severe pancreatic fistula (grades B or C) occurred less frequently in the PG than the PJ group (8.3% versus 20.5%; OR 0.37, 95% CI 0.23-0.59; P < 0.00001). However, there was no significant difference in morbidity (48.9% versus 51.0%; OR 0.90, 95% CI 0.70-1.16; P = 0.41), mortality (3.2% versus 3.5%; OR 0.82, 95% CI 0.43-1.58; P = 0.56), delayed gastric emptying (16.6% versus 14.7%; relative risk: 1.02, 95% CI 0.62-1.68; P = 0.94), postoperative haemorrhage (9.6% versus 11.1%; OR 0.82, 95% CI 0.54-1.24; P = 0.35) or reoperation (9.9% versus 9.8%; OR 0.93, 95% CI 0.60-1.43; P = 0.73).

CONCLUSIONS

Pancreaticogastrostomy provides benefits over PJ after PD, including in the incidences of pancreatic fistula, biliary fistula and intra-abdominal fluid collection and in hospital LoS. Therefore, PG is recommended as a safer and more reasonable alternative to PJ reconstruction after PD.

A simple pancreaticojejunostomy technique for hard pancreases using only two transpancreatic sutures with buttresses: a comparison with the previous pancreaticogastrostomy and dunking methods

PURPOSE

In this study, we introduced a novel technique, the pancreaticojejunostomy (PJ), which uses only two transpancreatic sutures with buttresses (PJt), and compared the surgical outcomes with previously used methods, especially for hard pancreases.

METHODS

A total of 101 patients who underwent pancreaticoduodenectomy with hard pancreases were enrolled and divided into 3 groups according to the method of pancreaticoenteric anastomosis: 30 patients (29.7%) underwent the conventional dunking method (Du), 31 patients (30.7%) underwent pancreaticogastrostomy using transpancreatic sutures (PGt) and 40 patients (39.6%) underwent PJ using transpancreatic sutures (PJt). The surgical outcomes were compared according to the type of anastomosis to analyze the feasibility and ease of each technique.

RESULTS

The overall operative time was shorter in the PJt group (325.1 ± 63.8 minutes) than in the PGt group (367.3 ± 70.5 minutes) or the Du group (412.0 ± 38.2 minutes, P < 0.001). In terms of pancreaticoenteric anastomosis time, it was also shorter in the PJt group (10.3 ± 3.5 minutes) than in the Du group (20.7 ± 0.7 minutes) or the PGt group (16.8 ± 5.4 minutes, P = 0.005). Significant postoperative pancreatic fistula (POPF) developed in 2 cases (6.7%) in the Du group, whereas there were no POPF cases in the PGt or PJt groups (P = 0.086). Overall postoperative morbidities occurred in 31 cases (30.7%), and there were no significant differences among the 3 groups (P = 0.692).

CONCLUSION

The novel PJ technique, which uses only two transpancreatic sutures with buttresses, is a very simple, easy and secure method for hard pancreases and can be performed in a shorter amount of time compared with conventional methods.

Pancreaticogastrostomy versus pancreaticojejunostomy after pancreaticoduodenectomy: a meta-analysis of randomized controlled trials

BACKGROUND

The best reconstruction method for the pancreatic remnant after pancreaticoduodenectomy remains debatable. We aimed to investigate the perioperative outcomes of 2 popular reconstruction methods: pancreaticogastrostomy and pancreaticojejunostomy.

DATA SOURCES

Randomized controlled trials comparing pancreaticogastrostomy versus pancreaticojejunostomy were identified from literature databases (MEDLINE/PubMed, EMBASE, Web of Science, Cochrane Library). The meta-analysis included 8 studies: 607 patients who underwent pancreaticogastrostomy and 604 who underwent pancreaticojejunostomy. Postoperative pancreatic fistula and intra-abdominal fluid collection rates were significantly lower after pancreaticogastrostomy compared with pancreaticojejunostomy. No statistically significant differences were found in the incidence of delayed gastric emptying, biliary fistula, hemorrhage, reoperation, wound infection, overall morbidity, mortality, and length of hospital stay.

CONCLUSIONS

Our meta-analysis suggests that pancreaticogastrostomy not only reduces the rate of postoperative pancreatic fistula but also decreases its severity. Pancreaticogastrostomy is associated with a lower rate of intra-abdominal fluid collection. Our results suggest that pancreaticogastrostomy should be the preferred reconstruction method.

Systematic review and meta-analysis of somatostatin analogues in the prevention of postoperative complication after pancreaticoduodenectomy

BACKGROUND

The use of somatostatin analogues (SAs) following pancreaticoduodenectomy (PD) is controversial.

METHOD

Literature databases were searched systematically for relevant articles. A meta-analysis of all randomized controlled trials (RCTs) evaluating prophylactic SAs in PD was performed.

RESULTS

Fifteen RCTs involving 1,352 patients were included. There was a towards reduced incidences of pancreatic fistulas (p = 0.26), clinically significant pancreatic fistulas (p = 0.08), and bleeding (p = 0.05) in prophylactic SAs group. In subgroup analyses, prophylactic somatostatin significantly reduced the incidence of pancreatic fistulas(p = 0.02), with a nonsignificant trend toward reduced incidence of clinically significantly pancreatic fistulas (p = 0.06).Pasireotide significantly reduced the incidence of clinically significantly pancreatic fistulas (p = 0.03). Octreotide had no influence on the incidence of pancreatic fistulas.

CONCLUSION

The current best evidence suggests prophylactic treatment with somatostatin or pasireotide has a potential role in reducing the incidence of pancreatic fistulas, while octreotide had no influence on the incidence of pancreatic fistulas.High-quality RCTs assessing the role of somatostatin and pasireotide are required for further verification.

Laparoscopic pancreatic reconstruction technique following laparoscopic pancreaticoduodenectomy

With the advance of laparoscopic experiences and techniques, it is carefully regarded that laparoscopic pancreaticoduodenectomy (lap-PD) is feasible and safe in managing perimapullary pancreatic pathology. Especially, laparoscopic management of remnant pancreas can be a critical step toward completeness of minimally invasive PD. According to available published reports, there is a wide range of technical differences in choosing surgical options in managing remnant pancreas after lap-PD. For the evidence-based surgical approach, it would be ideal to test potential techniques by randomized controlled trials, but, currently, it is thought to be very difficult to expect those clinical trials to be successful because there are still a lack of expert surgeons with sound surgical techniques and experience. In addition, lap-PD is so complicated and technically demanding that many surgeons are still questioning whether this surgical approach could be standardized and popular like laparoscopic cholecystectomy. In general, surgical options are usually chosen based on following question: (1) Is it simple? (2) Is it easy and feasible? (3) Is it secure and safe? (4) Is there any supporting scientific evidence? It would be interesting to estimate which surgical technique would be appropriate in managing remnant pancreas under these considerations. It is hoped that a well standardized multicenter-based randomized control study would be successful to test this fundamental issues based on sound surgical techniques and scientific background.

Pancreaticogastrostomy or pancreaticojejunostomy? Methods of digestive continuity reconstruction after pancreaticodudenectomy: a meta-analysis of randomized controlled trials

BACKGROUND AND AIMS

Reconstruction of digestive tract after pancreaticodudenectomy now has been proved associated with pancreatic fistula and complication incidence. The meta-analysis was conducted at the appropriate time enough randomized controlled trials were reported.

METHODS

Systematically literature search was performed through PubMed, EMBASE and Cochrane Library database without restriction to regions, or languages, only randomized controlled trials was included. 7 studies compared pancreatogastrostomy with pancreaticojejunostomy were included for meta-analysis. Fixed and random-effects models were used to measure the pooled estimates.

RESULTS

Patient underwent pancreatogastrostomy after pancreatoduodenectomy suffered less pancreatic fistula(p = 0.001) and bile leakage (p = 0.02), while the operative time, hospital stay, delayed gastric emptying and overall morbidity were comparable.

CONCLUSION

Pancreatogastrostomy is a recommended anastomosis technique according to the meta-analysis due to minimize incidence of pancreatic fistula and bile leakage.

Techniques for prevention of pancreatic leak after pancreatectomy

Pancreatic resections are some of the most technically challenging operations performed by surgeons, and post-operative pancreatic fistula (POPF) are not uncommon, developing in approximately 13% of pancreaticoduodenectomies and 30% of distal pancreatectomies. Multiple trials of various operative techniques in the creation of the pancreatic ductal anastomosis have been conducted throughout the years, and herein we review the literature and outcomes data regarding these techniques, although no one technique of pancreatic ductal anastomosis has been shown to be superior in decreasing rate of POPF. Similarly, we review the literature regarding techniques of pancreatic closure after distal pancreatectomy. Again, no one technique has been shown to be superior in preventing POPF; however the use of buttressing material on the pancreatic staple line in the future may be a successful means of decreasing POPF. We review adjunctive techniques to decrease POPF such as pancreatic ductal stenting, the use of various topical biologic glues, and the use of somatostatin analogue medications. We conclude that future trials will need to be conducted to find optimal techniques to decrease POPF, and meticulous attention to intra-operative details and post-operative care by surgeons is necessary to prevent POPF and optimally care for patients undergoing pancreatic resection.

Pancreaticogastrostomy versus pancreaticojejunostomy after pancreaticoduodenectomy: a systematic review and meta-analysis of randomized controlled trials

BACKGROUND

The aim of this systematic review was to compare postoperative outcomes between pancreaticogastrostomy and pancreaticojejunostomy after pancreaticoduodenectomy.

METHODS

Six databases were systematically reviewed to identify randomized controlled trials comparing pancreaticogastrostomy and pancreaticojejunostomy. Studies reporting postoperative complications, reoperations, and mortality were included (PROSPERO registration number CRD42013005383).

RESULTS

The search provided a total of 1,646 references. Seven studies were selected including 1,121 patients, 562 in the pancreaticogastrostomy group and 559 in the pancreaticojejunostomy group. Overall incidence of pancreatic fistula and the incidence of more severe fistulas (grade B/C) were lower in the pancreaticogastrostomy group (relative risk 0.67; 95% confidence interval (CI) 0.52 to 0.86; p = 0.002 and relative risk 0.61; 95 % CI 0.40 to 0.93; p = 0.02). Abdominal collections were more frequent in the pancreaticojejunostomy group. However, pancreaticogastrostomy was associated with an increased risk of postoperative intraluminal hemorrhage, and there were no differences in overall morbidity, reoperations, or mortality.

CONCLUSIONS

In this systematic review and meta-analysis, a reduction in the incidence of postoperative pancreatic fistula in the pancreaticogastrostomy group was observed. Although this evidence comes from randomized trials, pancreaticogastrostomy cannot be considered superior to pancreaticojejunostomy due to the presence of clinical heterogeneity among studies and the absence of differences in overall morbidity, reoperations, and mortality.

Acoustic radiation force impulse imaging of the pancreas for estimation of pathologic fibrosis and risk of postoperative pancreatic fistula

BACKGROUND

We sought to evaluate whether pancreatic elasticity, measured using acoustic radiation force impulse (ARFI) imaging, can determine the degree of pancreatic fibrosis and risk of pancreatic fistula (PF) in patients undergoing pancreatic resection. Although soft pancreatic texture is a reliable predictor of postoperative PF, noninvasive, quantitative methods of assessing pancreatic hardness have not been established.

STUDY DESIGN

Shear wave velocity (SWV) of the pancreas was preoperatively measured by ARFI imaging in 62 patients undergoing pancreatic resection. Correlations of SWV with pathologic degree of fibrosis in the resected pancreas, exocrine function of the remnant pancreas, and the incidence of postoperative PF were determined.

RESULTS

The SWV was positively correlated with the degree of pancreatic fibrosis (Spearman's rank correlation coefficient [ρ] = 0.660, p < 0.001) and inversely correlated with postoperative amylase concentrations and daily output of pancreatic juice. The incidence of postoperative PF was significantly higher in the 32 patients with soft (SWV < 1.54 m/s) than in the 30 with hard (SWV ≥ 1.54 m/s) pancreata (63% vs 17%, p < 0.001). Multivariate analysis showed that a soft pancreas (SWV < 1.54 m/s) was an independent predictor of postoperative PF (odds ratio 38.3; 95% CI 5.82 to 445; p = 0.001).

CONCLUSIONS

Pancreatic elasticity on preoperative ARFI imaging accurately reflected the pathologic degree of fibrosis and exocrine function of the pancreas, enabling surgeons to adopt appropriate surgical procedures according to the risk of postoperative PF in each patient undergoing pancreatic resection.

Isolated Roux loop pancreaticojejunostomy versus pancreaticogastrostomy after pancreaticoduodenectomy: a prospective randomized study

OBJECTIVES

The optimal strategy for the reconstruction of the pancreas following pancreaticoduodenectomy (PD) is still debated. The aim of this study was to compare the outcomes of isolated Roux loop pancreaticojejunostomy (IRPJ) with those of pancreaticogastrostomy (PG) after PD.

METHODS

Consecutive patients submitted to PD were randomized to either method of reconstruction. The primary outcome measure was the rate of postoperative pancreatic fistula (POPF). Secondary outcomes included operative time, day to resumption of oral feeding, postoperative morbidity and mortality, and exocrine and endocrine pancreatic functions.

RESULTS

Ninety patients treated by PD were included in the study. The median total operative time was significantly longer in the IRPJ group (320 min versus 300 min; P = 0.047). Postoperative pancreatic fistula developed in nine of 45 patients in the IRPJ group and 10 of 45 patients in the PG group (P = 0.796). Seven IRPJ patients and four PG patients had POPF of type B or C (P = 0.710). Time to resumption of oral feeding was shorter in the IRPJ group (P = 0.03). Steatorrhea at 1 year was reported in nine of 42 IRPJ patients and 18 of 41 PG patients (P = 0.029). Albumin levels at 1 year were 3.6 g/dl in the IRPJ group and 3.3 g/dl in the PG group (P = 0.001).

CONCLUSIONS

Isolated Roux loop PJ was not associated with a lower rate of POPF, but was associated with a decrease in the incidence of postoperative steatorrhea. The technique allowed for early oral feeding and the maintenance of oral feeding even if POPF developed.

Meta-analysis of pancreaticogastrostomy versus pancreaticojejunostomy after pancreaticoduodenectomy

BACKGROUND

Surgical reconstruction following pancreaticoduodenectomy (PD) is associated with significant morbidity and mortality. Because of great variability in definitions of specific complications, it remains unclear whether there is a difference in complication rates following the two commonest types of reconstruction, pancreaticogastrostomy (PG) and pancreaticojejunostomy (PJ). Published consensus definitions for postoperative pancreatic fistula (POPF) have led to a series of randomized clinical trials (RCTs) uniquely placed to address this question.

METHODS

A literature search was carried out to identify all RCTs comparing postoperative complications of PG versus PJ reconstruction following PD published between January 1995 and December 2013. Pooled odds ratios (ORs) with 95 percent confidence intervals (c.i.) were calculated using fixed-effect or random-effects models.

RESULTS

In total, seven RCTs with 1121 patients were included. Four of these trials applied definitions as published by the International Study Group on Pancreatic Fistula (ISGPF). Using ISGPF definitions, the incidence of POPF was lower in patients undergoing PG than in those having PJ (OR 0·50, 95 per cent c.i. 0·34 to 0·73; P < 0·001). Using definitions applied by each individual study, PG was associated with significantly lower rates of POPF (OR 0·51, 0·36 to 0·71; P < 0·001), intra-abdominal fluid collection (OR 0·50, 0·34 to 0·74; P < 0·001) and biliary fistula (OR 0·42, 0·18 to 0·93; P = 0·03) than PJ.

CONCLUSION

Meta-analysis of four RCTs based on ISGPF criteria, and seven RCTs using non-standard criteria, revealed that PG reduced the incidence of POPF after PD compared with PJ.

Is routine drainage necessary after pancreaticoduodenectomy?

With the development of imaging technology and surgical techniques, pancreatic resections to treat pancreatic tumors, ampulla tumors, and other pancreatic diseases have increased. Pancreaticoduodenectomy, one type of pancreatic resection, is a complex surgery with the loss of pancreatic integrity and various anastomoses. Complications after pancreaticoduodenectomy such as pancreatic fistulas and anastomosis leakage are common and significantly associated with patient outcomes. Pancreatic fistula is one of the most important postoperative complications; this condition can cause intraperitoneal hemorrhage, septic shock, or even death. An effective way has not yet been found to avoid the occurrence of pancreatic fistula. In most medical centers, the frequency of pancreatic fistula has remained between 9% and 13%. The early detection and routine drainage of anastomotic fistulas, pancreatic fistulas, bleeding, or other intra-abdominal fluid collections after pancreatic resections are considered as important and effective ways to reduce postoperative complications and the mortality rate. However, many recent studies have argued that routine drainage after abdominal operations, including pancreaticoduodenectomies, does not affect the incidence of postoperative complications. Although inserting drains after pancreatic resections continues to be a routine procedure, its necessity remains controversial. This article reviews studies of the advantages and disadvantages of routine drainage after pancreaticoduodenectomy and discusses the necessity of this procedure.

Randomized clinical trial of isolated Roux-en-Y versus conventional reconstruction after pancreaticoduodenectomy

BACKGROUND

Pancreaticoduodenectomy (PD) is associated with a high incidence of postoperative complications including pancreatic fistula. This randomized clinical trial compared the incidence of pancreatic fistula between the isolated Roux-en-Y (IsoRY) and conventional reconstruction (CR) methods.

METHODS

Patients admitted for PD between June 2009 and September 2012 in a single centre were assigned randomly to CR or IsoRY. The primary endpoint was the incidence of pancreatic fistula (grade A-C) defined according to the International Study Group on Pancreatic Fistula. Secondary endpoints were complication rates, mortality and hospital stay. Multiple logistic regression analysis was performed to identify factors associated with pancreatic fistula.

RESULTS

Some 153 patients were randomized, 76 to CR and 77 to IsoRY; two patients from the IsoRY group were excluded after randomization. Pancreatic fistula occurred in 26 patients (34 per cent) in the CR group and 25 (33 per cent) in the IsoRY group (P = 0·909). The number of patients with a clinically relevant pancreatic fistula (grade B or C) was similar in the two groups (10 and 11 patients respectively; P = 0·789), as were complication rates (42 versus 40 per cent; P = 0·793) and mortality (none in either group; P = 0·999). Soft pancreas was the only independent risk factor for pancreatic fistula (odds ratio 4·42, 95 per cent confidence interval 1·85 to 10·53; P <0·001).

CONCLUSION

This study showed that IsoRY reconstruction does not reduce the incidence of pancreatic fistula compared with CR.

REGISTRATION NUMBER

NCT00915863 (http://www.clinicaltrials.gov/) and UMIN000001967 (http://www.umin.ac.jp/).

Enteric reconstruction of pancreatic stump following pancreaticoduodenectomy: a review of the literature

Techniques for reconstruction of pancreatic stump with gastrointestinal tract following pancreaticoduodenectomy are closely related to postoperative complications, mortality and quality of life. In order to reduce postoperative complications, particularly pancreatic fistula, many modifications and new surgical techniques have been proposed to replace the traditional pancreaticojejunostomy and pancreaticogastrostomy. The objective of this review, based on large prospective randomized trials and meta-analyses, is to evaluate the different techniques of enteric reconstruction of pancreatic stump following pancreaticoduodenectomy, including: invagination pancreaticojejunostomy, binding pancreaticojejunostomy, duct-to-mucosa pancreaticojejunostomy, Roux-en-Y pancreaticojejunostomy, and pancreaticogastrostomy, so as to provide a comprehensive comparison of these techniques and to assess of their roles and effectiveness.

Pancreaticogastrostomy versus pancreaticojejunostomy

BACKGROUND

It has long been debated whether pancreaticogastrostomy (PG) or pancreaticojejunostomy (PJ) is the better choice for reconstruction after pancreaticoduodenectomy. The purpose of this study is to evaluate the two techniques.

METHODS

Randomized controlled trials (RCTs) comparing PG with PJ published from January 1995 to January 2014 were searched electronically using PubMed, Medline, and Cochrane Library. Published data of these RCTs were analyzed using either fixed-effects model or random-effects model.

RESULTS

Seven RCTs were included in this meta-analysis, with a total of 1121 patients (562 in PG, 559 in PJ). The incidence of postoperative pancreatic fistula and intra-abdominal fluid collection were significantly lower in PG than in PJ (respectively: odds ratio = 0.53 [0.37, 0.74], P < 0.001; odds ratio = 0.48 [0.30, 0.76], P < 0.01), no significant difference could be found for delayed gastric emptying, hemorrhage, morbidity, reoperation rate, and mortality.

CONCLUSIONS

The evidence from RCTs suggests that PG technique is associated with a lower rate of postoperative pancreatic fistula and intra-abdominal fluid collection than PJ.

Perioperative management for pancreatoduodenectomy following severe acute pancreatitis in patients with periampullary cancer: our experience with six consecutive cases

PURPOSE

We rarely have an opportunity to perform pancreatoduodenectomy (PD) following the onset of severe acute pancreatitis (SAP) for patients with periampullary cancer. The perioperative risks and optimal timing of subsequent PD have, therefore, remained unclear.

METHODS

Between January 2006 and December 2012, we performed PD in six patients with SAP. We reviewed these six cases, and compared the perioperative risks of morbidity and mortality with those of 81 concurrent PD patients matched for primary cancer without preoperative SAP.

RESULTS

The six patients were classified as having SAP based on the Japanese criteria developed in 2008. The SAP in five patients was caused by ERCP procedures. The median interval from SAP onset to the operation was 111 days. The rate of Grade B/C postoperative pancreatic fistula formation in the SAP patients was significantly higher than that of the 81 control patients (83 vs. 26 %, P < 0.001). In addition, the median postoperative hospital stay was significantly longer in the six SAP patients relative to that of the control patients (40 vs. 30 days, P < 0.001).

CONCLUSIONS

An interval of at least 3 months after surgery may be needed to decrease the inflammation of the peripancreas region after SAP. Therefore, unnecessary and low-yield ERCP procedures should be avoided in these patients.

Pancreaticoduodenectomy--the transition from a low- to a high-volume center

OBJECTIVE

Previous studies have identified a significant volume-outcome relationship for hospitals performing pancreaticoduodenectomy (PD). However, scant information exists concerning the effects of increased caseload of PD within the same hospital. Here, we describe the effects of becoming a high-volume provider of PD.

MATERIAL AND METHODS

The study group comprised 221 patients who underwent PD between 2000 and 2012. Hospital volume was allocated into three groups: low-volume (<10 PDs/year), years 2000-2004, n = 25; medium-volume (10-24 PDs/year), years 2005-2009, n = 86; and high-volume (≥25 PDs/year), years 2010-2012, n = 110.

RESULTS

The annual number of PDs increased from 5 in 2000 to 39 in 2012. The median operative duration decreased over the volume categories (p < 0.001). Intraoperative blood loss dropped (p < 0.001). The need for intraoperative blood transfusion was reduced (p < 0.001). Increasing hospital volume was associated with fewer reoperations (p = 0.041) and shorter postoperative length of stay (p = 0.010). There was a tendency toward reduced mortality: 4.0% for the low-volume period, 2.3% for the medium-volume period, and 0% for the high-volume period (p = 0.066).

CONCLUSIONS

The transition from a low- to a high-volume center resulted in optimized outcomes for PD and 0% operative mortality, favoring the continued centralization of this high-risk operation.

Retrospective comparison of robot-assisted minimally invasive versus open pancreaticoduodenectomy for periampullary neoplasms

BACKGROUND

As with other open procedures now routinely performed using laparoscopy, minimally invasive pancreaticoduodenectomy (MIPD) may result in decreased pain, fewer wound complications, and accelerated recovery. However, when used for periampullary cancers, it is also important to assess if MIPD offers comparable oncologic outcomes.

METHODS

Technical and perioperative outcomes were compared between patients with a preoperative diagnosis of periampullary neoplasm offered MIPD or open pancreaticoduodenectomy (OPD) from November 2009 to July 2011.

RESULTS

Fifty-six consecutive MIPD and OPD (28 each) procedures were analyzed. Comparing MIPD to OPD, significant differences included longer median procedure time (431 vs 410 min, p = .04) and fewer median lymph nodes harvested (15 vs. 20, p = .04). R0 resection rate tended to be lower (63 vs. 88%, p = .07) as well as surgical site infections (18 vs. 43 %, p = .08). Clinically significant pancreatic fistula rate was the same between groups (21%). Other outcomes such as narcotic pain medication use, length of stay, and 30-day readmission rates were also similar.

CONCLUSIONS

MIPD is feasible with comparable technical success and outcomes to OPD. However, there is a learning curve to the procedure and further experience and prospective study will be required to better establish the oncologic efficacy of MIPD to open resection.

Pylorus-preserving versus pylorus-resecting pancreaticoduodenectomy for periampullary and pancreatic carcinoma: a meta-analysis

BACKGROUND

The aim of this meta-analysis was to compare the long-term survival, mortality, morbidity and the operation-related events in patients with periampullary and pancreatic carcinoma undergoing pylorus-preserving pancreaticoduodenectomy (PPPD) and pylorus-resecting pancreaticoduodenectomy (PRPD).

METHOD

A systematic search of literature databases (Cochrane Library, PubMed, EMBASE and Web of Science) was performed to identify studies. Outcome measures comparing PPPD versus PRPD for periampullary and pancreatic carcinoma were long-term survival, mortality, morbidity (overall morbidity, delayed gastric emptying [DGE], pancreatic fistula, wound infection, postoperative bleeding, biliary leakage, ascites and gastroenterostomy leakage) and operation related events (hospital stays, operating time, intraoperative blood loss and red blood cell transfusions).

RESULTS

Eight randomized controlled trials (RCTs) including 622 patients were identified and included in the analysis. Among these patients, it revealed no difference in long-term survival between the PPPD and PRPD groups (HR = 0.23, p = 0.11). There was a lower rate of DGE (RR = 2.35, p = 0.04, 95% CI, 1.06-5.21) with PRPD. Mortality, overall morbidity, pancreatic fistula, wound infection, postoperative bleeding, biliary leakage, ascites and gastroenterostomy leakage were not significantly different between the groups. PPPDs were performed more quickly than PRPDs (WMD = 53.25 minutes, p = 0.01, 95% CI, 12.53-93.97); and there was less estimated intraoperative blood loss (WMD = 365.21 ml, p = 0.006, 95% CI, 102.71-627.71) and fewer red blood cell transfusions (WMD = 0.29 U, p = 0.003, 95% CI, 0.10-0.48) in patients undergoing PPPD. The hospital stays showed no significant difference.

CONCLUSIONS

PPPD had advantages over PRPD in operating time, intraoperative blood loss and red blood cell transfusions, but had a significantly higher rate of DGE for periampullary and pancreatic carcinoma. PPPD and PRPD had comparable mortality and morbidity including pancreatic fistulas, wound infections, postoperative bleeding, biliary leakage, ascites and gastroenterostomy leakage. Our conclusions were limited by the available data. Further evaluations of high-quality RCTs are needed.

Postpancreatectomy hemorrhage--incidence, treatment, and risk factors in over 1,000 pancreatic resections

BACKGROUND

Postpancreatectomy hemorrhage is a rare but often severe complication after pancreatic resection. The aim of this retrospective study was to define incidence and risk factors of postpancreatectomy hemorrhage and to evaluate treatment options and outcome.

PATIENTS AND METHODS

Clinical data was extracted from a prospectively maintained database. Descriptive statistics, univariate and multivariate risk factor analysis by binary logistic regression were performed with SPSS software at a significance level of p = 0.05.

RESULTS

N = 1,082 patients with pancreatic resections between 1994 and 2012 were included. Interventional angiography was successful in about half of extraluminal bleeding. A total of 78 patients (7.2 %) had postpancreatectomy hemorrhage (PPH), and 29 (2.7 %) were grade C PPH. Multivariate modeling disclosed a learning effect, age, BMI, male sex, intraoperative transfusion, portal venous and multivisceral resection, pancreatic fistula and preoperative biliary drainage as independent predictors of severe postpancreatectomy hemorrhage. High-risk histopathology, age, transfusion, pancreatic fistula, postpancreatectomy hemorrhage and pancreatojejunostomy in pancreatoduodenectomies were independent predictors of mortality.

CONCLUSIONS

Our study identifies clinically relevant risk factors for postpancreatectomy hemorrhage and mortality. Interventional treatment of extraluminal hemorrhage is successful in about half of the cases and if unsuccessful constitutes a valuable adjunct to operative hemostasis. Based on our observations, we propose a treatment scheme for PPH. Risk factor analysis suggests appropriate patient selection especially for extended resections and pancreatogastrostomy for reconstruction in pancreatoduodenectomy.