Pylorus Ring Resection Reduces Delayed Gastric Emptying in Patients Undergoing Pancreatoduodenectomy: A Prospective, Randomized, Controlled Trial of Pylorus-Resecting Versus Pylorus-Preserving Pancreatoduodenectomy

Risk factors for delayed gastric emptying after pancreatoduodenectomy: a 10-year retrospective study

BACKGROUND

Delayed gastric emptying (DGE) is a frequent complication of pancreatoduodenectomy (PD) and is associated with prolonged hospital stay, readmission, increased hospital costs and decreased quality of life. However, the pathophysiology of DGE remains unclear.

METHODS

This is a retrospective study of patients who underwent PD for pancreatic or periampullary tumours. All these patients were operated between January 2012 and February 2023. The patients were divided into four groups according to the development of DGE after PD: No DGE, DGE grade A, DGE grade B and DGE grade C. The groups were compared in terms of outcomes and complications. We also analysed the preoperative and perioperative risk factors for DGE development.

RESULTS

Between January 2012 and February 2023, a total of 250 patients underwent PD. These patients were divided into four groups: No DGE (n = 152); DGE grade A (n = 42); DGE grade B (n = 45); and DGE grade C (n = 11). The incidence of the postoperative pancreatic fistulas (POPFs) grade B/C was significantly higher in the DGE grade C group (p < .001), and the rates of post-pancreatectomy haemorrhage (p = .004) and reoperation (p < .001) were significantly higher in the DGE grade B/C groups. A significantly higher rate of grade III-IV Clavien-Dindo complications (p < .001), longer intensive care unit (p < .001) and longer hospital stays (p < .001) were observed in the DGE grade C group; and 90-day mortality (p < .001) and morbidity (p < .001) were significantly higher in the DGE grade B/C groups. Multivariate analysis demonstrated that the POPF grade B/C was a risk factor of DGE grade B/C (OR: 9.147; 95%CI: 4.125-20.281; p < .001).

CONCLUSIONS

POPF B/C is a risk factor for grade B/C DGE. Prevention of surgical complications and early treatment could contribute to the decreased incidence of DGE.

Intraoperative Endoluminal Pyloromyotomy Versus Stretching of the Pylorus for the Reduction of Delayed Gastric Emptying After Pylorus-Preserving Partial Pancreatoduodenectomy: A Blinded Randomized Controlled Trial (PORRIDGE Study; DRKS00013503)

BACKGROUND

Pylorus-preserving partial pancreatoduodenectomy (ppPD) is a treatment for tumors of the pancreatic head. Delayed gastric emptying (DGE) is one of the most common complications following ppPD. In a retrospective analysis, intraoperative endoluminal pyloromyotomy (PM) was shown to be associated with a reduction in DGE rates.

OBJECTIVE

The aim of this randomized controlled trial was to investigate the effect of intraoperative endoluminal PM on DGE after ppPD.

METHODS

Patients undergoing ppPD were randomized intraoperatively to receive either PM or atraumatic stretching of the pylorus prior to creation of the duodenojejunostomy. The primary endpoint was the rate of DGE within 30 days after surgery.

RESULTS

Sixty-four patients were randomly assigned to the PM group and 64 patients were assigned to the control group. There were no differences between the two groups regarding baseline characteristics. The DGE rate was 59.4% (76/126). In two patients (1.6%) DGE was not assessable. The most common DGE grade was A (51/126, 40.5%), followed by B (20/126, 15.9%) and C (5/126, 4.0%). The rate of DGE was 62.5% in the PM group versus 56.3% in the control group (odds ratio 1.41, 95% confidence interval 0.69-2.90; p = 0.34). The complication rate did not differ between both groups (p = 0.79) and there were no differences in quality of life on postoperative day 30.

CONCLUSIONS

Intraoperative endoluminal PM did not reduce the rate or severity of DGE after ppPD compared with atraumatic stretching of the pylorus.

Outcome following pylorus resecting pancreaticoduodenectomy versus classical Whipple's pancreaticoduodenectomy: a randomised controlled trial

OBJECTIVE

To compare pylorus resecting pancreaticoduodenectomy (PRPD) with classical pancreaticoduodenectomy (classical PD) in terms of short term outcomes.

BACKGROUND

There is some evidence that Pylorus resecting PD (PRPD) is associated with lesser incidence of DGE when compared to pylorus preserving PD (PPPD). However, no study has previously compared PRPD with classical PD.

METHODS

Patients requiring PD were randomly assigned to either PRPD or classical PD after intraoperative assessment to rule out metastases and unresectable disease. Occurrence of DGE was the primary end point.

RESULTS

A total of 154 patients (103 males; Mean age:53.3 ± 12.2 years) were included in the final analysis (PRPD = 78, classical PD = 76). PRPD group had significantly shorter operation [Mean difference: 41 min (95 % CI:18-65)]. There was no significant difference in the incidence of DGE [32 (41.0 %)vs37 (48.7 %); p = 0.339] and clinically significant DGE [22 (28.2 %)vs19 (25.0 %); p = 0.789] between PRPD and classical PD. There was also no difference in the rates of clinically relevant pancreatic fistula [20 (25.6 %)vs22 (28.9 %); p = 0.780], severe morbidity [21 (26.9 %)vs19 (25.0 %); p = 0.930], operative mortality [6 (7.7 %)vs2 (2.6 %); p = 0.157] and median postoperative stay [12 (5-47) days vs 12 (6-56) days; p = 0.861].

CONCLUSION

We found no significant difference in the early postoperative outcomes between PRPD and classical PD. PRPD was found to be significantly faster than the classical PD.

Comparison of reconstruction techniques after pancreatoduodenectomy: A single-center retrospective cohort study

BACKGROUND

There is controversy regarding which is the best reconstruction technique after the pancreatoduodenectomy. Currently, there are no studies comparing the three most frequent reconstruction techniques: Whipple + Roux-en-Y gastrojejunostomy (WRYGJ), pyloric-preserving + Billroth II (PPBII), and Whipple + BII (WBII).

METHODS

Between 2012 and March 2023, 246 patients underwent pancreaticoduodenectomy with the following type of reconstruction techniques: (1) WRYGJ: 40 patients; (2) PPBII: 118 patients; and (3) WBII: 88 patients. A retrospective comparative study among these groups was performed.

RESULTS

No significant differences were found among the groups regarding duration of the surgery, the blood volume transfused, or caliber of the Wirsung duct. The size and types of tumors, the degree of differentiation and tumor invasion of the peripancreatic tissue, vascular and neural structures, and lymph nodes were similar among the groups. The rate of R0 resection was lower in WBII (62.5% [55/88]) than in WRYGJ (75% [30/40]) and PPBII (72% [85/118]), but statistically insignificant among the groups (p = 0.232). The incidences of relevant B/C postoperative pancreatic fistula (POPF) were similar among the groups: 7.5% (7/40) in WRYGJ, 17% (20/118) in PPBI, and 26.2% (23/88) in WBII (p = 0.292). In addition, the incidence of B/C delayed gastric emptying (DGE) was higher in WBII (27.3% [24/88]) than in WRYGJ (20% [8/40]) and PPBII (19.5% [23/118]) but statistically insignificance among the groups (p = 0.381). The incidence of medical and surgical complications, intensive care unit and hospital stays, morbimortality at 90 days, and 5-year survival were similar among the groups. Multivariate analysis revealed that POPF grade B/C was a risk factor for DGE grade B/C (odds ratio (OR) = 9.903, 95% confidence interval (CI) = 4.829-20.310; p < 0.001), and a <3-mm Wirsung duct was a risk factor for POPF (OR = 3.604, 95% CI = 1.791-7.254; p < 0.001).

CONCLUSION

No technique was superior to the others. Only relevant POPF B/C was a risk factor for DGE B/C, and <3 mm Wirsung for a POPF.

Primary delayed gastric emptying after pylorus-resecting pancreatoduodenectomy: A matched-pair comparison of Roux-en-Y vs. Billroth-II reconstruction

Background

After pylorus-resecting pancreatoduodenectomy (PrPD), delayed gastric emptying (DGE) might partially be attributed to biliary reflux. We investigated whether the incidence of primary DGE is reduced after Roux-en-Y instead of Billroth-II reconstruction.

Methods

Patients undergoing PrPD from 2016 to 2019 at a high-volume center were identified. Excluding causes of secondary DGE, we matched patients with Roux-en-Y and Billroth-II reconstruction in a 1:2 ratio and compared primary DGE.

Results

In 24 vs. 48 (Roux-en-Y vs. Billroth-II) patients, DGE (grade B/C) incidence (20.8 % vs. 18.8 %; P = 1.000), nasogastric tube requirement (median 2 vs. 2 days; P = 0.844) and time to solid food intake (7 vs. 7 days; P = 0.933) were comparable. Univariable logistic regression showed no association between DGE and Roux-en-Y reconstruction (OR 1.47; P = 0.524), in contrast to age (1.08; P = 0.030) and pancreatic biochemical leak (4.98; P = 0.007).

Conclusions

Primary DGE did not differ between Roux-en-Y and Billroth-II reconstruction after PrPD. Instead, age and postoperative pancreatic biochemical leak were associated with higher DGE risk.

Impact of Straight Stomach Reconstruction on Delayed Gastric Emptying and Nutritional Recovery After Pancreaticoduodenectomy

BACKGROUND

The aim of this study was to evaluate the effectiveness of a modified reconstruction technique-anchored straight stomach reconstruction-in reducing the incidence of delayed gastric emptying (DGE) after pancreaticoduodenectomy (PD) and its impact on postoperative nutritional recovery.

METHODS

A case series analysis of 125 consecutive PD patients was conducted: 104 of them had undergone anchored straight stomach reconstruction (SSR group) and the remaining 21 without (Non-SSR group). The incidence of DGE and the change in postoperative nutritional status (body weight and serum albumin level during 12 months post-surgery) were compared.

RESULTS

The incidence of DGE in the SSR group (13%) was significantly lower than that in the Non-SSR group (33%) (P = .018); further the significant DGE (grade B or C) was only 5%. Comparison of nutritional status showed that SSR facilitated a prompt recovery of body weight and serum albumin level at 6 months after PD. At 12 months after surgery, body weight gain was significantly better in the SSR group than in the Non-SSR group (P = .006), and albumin level tended to be higher in the SSR group (P = .071).

CONCLUSION

Straight stomach reconstruction is able to reduce DGE in patients after PD and also improves their postoperative nutritional recovery.

Enhanced Recovery After Surgery (ERAS) in Pancreatic Surgery: The Surgeon's Point of View

Pancreatic surgery is complex and associated with higher rates of morbidity and mortality compared to other abdominal surgeries. Over the past decade, the introduction of new technologies, such as minimally invasive approaches, improvements in multimodal treatments, advancements in anesthesia and perioperative care, and better management of complications, have collectively improved patient outcomes after pancreatic surgery. In particular, the adoption of Enhanced Recovery After Surgery (ERAS) recommendations has reduced hospital stays and improved recovery times, as well as post-operative outcomes. The aim of this narrative review is to highlight the surgeon's perspective on the ERAS program for pancreatic surgery, with a focus on its potential advantages for perioperative functional recovery outcomes.

The safety and efficacy of stapler method for transection of the pancreatic parenchyma during pancreatoduodenectomy (STRAP-PD trial): study protocol for a randomized control trial

BACKGROUND

Pancreaticoduodenectomy is a highly difficult and invasive type of gastrointestinal surgery. Prevention of postoperative pancreatic fistula is important, and this may be possible by the stapler method.

METHODS

STRAP-PD is a single center randomized controlled trial. We compare a method of transecting the pancreatic parenchyma in pancreaticoduodenectomy using a surgical stapler device with a conventional transecting method using energy devices (e.g., scalpel, ultrasonic coagulator and incision devices). Patients with soft pancreas who are scheduled to undergo pancreaticoduodenectomy are randomized to arm A (conventional method) or arm B (stapler method). We aim to examine the safety and usefulness of dissection by the automatic suture device, with attention to the rate of pancreatic fistula ISGPF grade B or C and to postoperative complications. This is a single-center randomized study, which began in September 2023 at Wakayama Medical University Hospital.

DISCUSSION

Pancreatic parenchymal transection is typically performed either by direct incision using a scalpel or by employing energy devices such as ultrasonic coagulating cutting devices during pancreaticoduodenectomy. In a prospective pilot study, we conducted pancreatic parenchymal transection in 20 consecutive normal pancreatic cases during pancreaticoduodenectomy, observing postoperative pancreatic fistula grade B in one case (5%). Traditional methods involving scalpel incision or the use of ultrasonic coagulating cutting devices have been historically favored but perceived as technically challenging, and they have been reliant upon the surgeon's skill. Notably, relatively high incidences of postoperative pancreatic fistula among patients with soft pancreas have also been observed. Our proposed stapler method may therefore be a useful method responsible for reducing the development of pancreatic fistula. This method would be as part of minimally-invasive surgery for pancreaticoduodenectomy. It uses an endoscopic linear stapler to cut the pancreatic parenchyma, so it is likely to be more convenient than conventional methods and can be used universally. TRIAL REGISTRATION: University Hospital Medical Information Network Clinical Trials Registry, UMIN000052089. the Registration Date on 1st September 2023.

Surgical techniques to prevent delayed gastric emptying after pancreaticoduodenectomy

BACKGROUND

Delayed gastric emptying (DGE) is one of the most common complications after pancreaticoduodenectomy (PD). DGE represents impaired gastric motility without significant mechanical obstruction and is associated with an increased length of hospital stay, increased healthcare costs, and a high readmission rate. We reviewed published studies on various technical modifications to reduce the incidence of DGE.

DATA SOURCES

Studies were identified by searching PubMed for relevant articles published up to December 2022. The following search terms were used: "pancreaticoduodenectomy", "pancreaticojejunostomy", "pancreaticogastrostomy", "gastric emptying", "gastroparesis" and "postoperative complications". The search was limited to English publications. Additional articles were identified by a manual search of references from key articles.

RESULTS

In recent years, various surgical procedures and techniques have been explored to reduce the incidence of DGE. Pyloric resection, Billroth II reconstruction, Braun's enteroenterostomy, and antecolic reconstruction may be associated with a decreased incidence of DGE, but more high-powered studies are needed in the future. Neither laparoscopic nor robotic surgery has demonstrated superiority in preventing DGE, and the use of staplers is controversial regarding whether they can reduce the incidence of DGE.

CONCLUSIONS

Despite many innovations in surgical techniques, there is no surgical procedure that is superior to others to reduce DGE. Further larger prospective randomized studies are needed.

Impact of marmara-yegen cuttıng gastrojejunostomy on delayed gastrıc emptyıng after pancreatoduodenectomy: ınıtıal results

BACKGROUND

Delayed gastric emptying (DGE) is one of the most common reasons for morbidity after pancreatoduodenectomy. The technical characteristics of anastomosis that could be affected by surgeon may offer a relevant chance to improve postoperative DGE rates. We investigated the effect of a technical modification of gastrojejunostomy after the classical pancreaticoduodenectomy on DGE.

MATERIALS AND METHODS

A total of 161 patients underwent classical pancreaticoduodenectomy (with 20-40 percent antrectomy) due to pancreatic adenocarcinoma at the Department of General Surgery, Marmara University, School of Medicine Hospital, from February 2019 to May 2023, and those who met the inclusion criteria were enrolled. One hundred twenty patients had undergone classical end-to-side gastrojejunostomy (Classical GJ group), and 41 had undergone Marmara-Yegen cutting side-to-side gastrojejunostomy (M-Yc group). DGE was defined according to the International Working Group on Pancreatic Surgery, and postoperative DGE rates of both groups were compared. In addition, multivariate analysis was performed to identify possible independent predictive factors for DGE.

RESULTS

The total incidence of DGE was 31% in the Classical GJ group and 17% in the (M-Yc group). Although there was no significant difference between the groups regarding DGE and DGE grades (p = 0.1), DGE was distinctly lower in the M-Yc GJ group. In multi-variant analysis, Clavien-Dindo grade 3a and above postoperative complication was determined as independent predictors for DGE.

CONCLUSIONS

We tried to explain the mechanism of DGE in terms of anatomical configuration. The incidence and severity of DGE decreased in patients who underwent M-Yc GJ.

How to Reduce Delayed Gastric Emptying After Pancreatoduodenectomy: A Systematic Literature Review and Meta-Analysis

Introduction

The occurrence of delayed gastric emptying (DGE) following pancreatoduodenectomy is of high clinical relevance. Despite the pivotal nature of this topic, the existing evidence is limited and often conflicting. This meta-analysis aims to assess the impact of various interventions, such as the type of surgical reconstruction (specifically pylorus resection or preservation), enhanced recovery after surgery (ERAS), epidural anesthesia (EA), as well as strategies involving nasogastric decompression on DGE.

Methods

Following the PRISMA guidelines, a systematic search was conducted. Studies that compared patients undergoing pancreatoduodenectomy regarding one of the following interventions were included: pylorus-preserving pancreaticoduodenectomy (ppPD) versus pylorus-resecting pancreaticoduodenectomy (prPD), ERAS versus no ERAS, epidural anesthesia EA versus no EA, nasogastric decompression versus no nasogastric decompression and jejunostomy/nasojejunal feeding tube placement (J/NJF) versus no J/NJF.

Results

The analysis included 5930 patients from 29 studies. Patients undergoing ppPD exhibited a higher incidence of DGE compared with those undergoing prPD (logOR, -0.95; 95% CI = -1.57 to -0.34; P = 0.002). Additionally, patients in the ERAS group showed reduced rates of DGE (logOR, -0.712; 95% CI = -1.242 to -0.183; P = 0.008). Lower rates of DGE were observed in patients without a J/NJF (logOR, -0.618; 95% CI, 0.39-0.84; P < 0.001).

Conclusion

In summary, our meta-analysis reveals that pylorus resection, adherence to ERAS protocols, and the absence of a J/NJF are associated with lower rates of DGE after pancreatoduodenectomy. Although these results are partially based on observational studies, they contribute valuable insights to the current understanding of interventions impacting DGE in these complex procedures.

Minimally invasive versus open pancreatoduodenectomy in benign, premalignant, and malignant disease

OBJECTIVES

This is a protocol for a Cochrane Review (intervention). The objectives are as follows: To assess the benefits and harms of laparoscopic or robot-assisted pancreatoduodenectomy versus open pancreatoduodenectomy for people with benign, premalignant, and malignant disease.

Delayed gastric emptying after laparoscopic pancreaticoduodenectomy: a single-center experience of 827 cases

BACKGROUND

Delayed gastric emptying (DGE) commonly occurs after pancreaticoduodenectomy (PD). Risk factors for DGE have been reported in open PD but are rarely reported in laparoscopic PD (LPD). This study was designed to evaluate the perioperative risk factors for DGE and secondary DGE after LPD in a single center.

METHODS

This retrospective cohort study included patients who underwent LPD between October 2014 and April 2023. Demographic data, preoperative, intraoperative, and postoperative data were collected. The risk factors for DGE and secondary DGE were analyzed.

RESULTS

A total of 827 consecutive patients underwent LPD. One hundred and forty-two patients (17.2%) developed DGE of any type. Sixty-five patients (7.9%) had type A, 62 (7.5%) had type B, and the remaining 15 (1.8%) had type C DGE. Preoperative biliary drainage (p = 0.032), blood loss (p = 0.014), and 90-day any major complication with Dindo-Clavien score ≥ III (p < 0.001) were independent significant risk factors for DGE. Seventy-six (53.5%) patients were diagnosed with primary DGE, whereas 66 (46.5%) patients had DGE secondary to concomitant complications. Higher body mass index, soft pancreatic texture, and perioperative transfusion were independent risk factors for secondary DGE. Hospital stay and drainage tube removal time were significantly longer in the DGE and secondary DGE groups.

CONCLUSION

Identifying patients at an increased risk of DGE and secondary DGE can be used to intervene earlier, avoid potential risk factors, and make more informed clinical decisions to shorten the duration of perioperative management.

The influence of delayed gastric emptying on quality of life after partial duodenopancreatectomy

PURPOSE

Quality of life (QoL) is temporarily compromised after pancreatic surgery, but no evidence for a negative impact of postoperative complications on QoL has been provided thus far. Delayed gastric emptying (DGE) is one of the most common complications after pancreatic surgery and is associated with a high level of distress. Therefore, the aim of this study was to analyse the influence of DGE on QoL.

METHODS

This single-centre retrospective study analysed QoL after partial duodenopancreatectomy (PD) via the European Organization for Research and Treatment of Cancer core questionnaire (QLQ-C30). The QoL of patients with and without postoperative DGE was compared.

RESULTS

Between 2010 and 2022, 251 patients were included, 85 of whom developed DGE (34%). Within the first postoperative year, compared to patients without DGE, those with DGE had a significantly reduced QoL, by 9.0 points (95% CI: -13.0 to -5.1, p < 0.001). Specifically, physical and psychosocial functioning (p = 0.020) decreased significantly, and patients with DGE suffered significantly more from fatigue (p = 0.010) and appetite loss (p = 0.017) than patients without DGE. After the first postoperative year, there were no significant differences in QoL or symptom scores between patients with DGE and those without DGE.

CONCLUSION

Patients who developed DGE reported a significantly reduced QoL and reduced physical and psychosocial functioning within the first year after partial pancreatoduodenectomy compared to patients without DGE.

Whipple's cephalic pancreaticoduodenectomy versus pyloric-preserving pancreaticoduodenectomy. Retrospective study

INTRODUCTION

Controversy exists in the literature as to the best technique for pancreaticoduodenectomy (PD), whether pyloric preservation (PP-CPD) or Whipple's technique (with antrectomy [W-CPD]), the former being associated with a higher frequency of delayed gastric emptying (DGE).

METHODS

Retrospective and comparative study between PP-CPD technique (n = 124 patients) and W-CPD technique (n = 126 patients), in patients who were operated for tumors of the pancreatic head and periampullary region between the period 2012 and 2023.

RESULTS

Surgical time was longer, although not significant, with the W-CPD technique. Pancreatic and peripancreatic tumor invasion (p = 0.031) and number of lymph nodes resected (p < 0.0001) reached statistical significance in W-CPD, although there was no significant difference between the groups in terms of lymph node tumor invasion. Regarding postoperative morbimortality (medical complications, postoperative pancreatic fistula [POPF], hemorrhage, RVG, re-interventions, in-hospital mortality, Clavien-Dindo complications), ICU and hospital stay, no statistically significant differences were observed between the groups. During follow-up, no significant differences were observed between the groups for morbidity and mortality at 90 days and survival at 1, 3 and 5 years. Binary logistic regression analysis for DGE showed that binary relevant POPF grade B/C was a significant risk factor for DGE.

CONCLUSIONS

Postoperative morbidity and mortality and long-term survival were not significantly different with PP-CPD and W-CPD, but POPF grade B/C was a risk factor for DGE grade C.

Hand-sewn gastrojejunal anastomosis reduces delayed gastric emptying after pancreaticoduodenectomy: A single-center retrospective clinical study of 1,077 consecutive patients

BACKGROUND

Hand-sewn anastomosis and stapled anastomosis are the 2 main types of gastrojejunal anastomotic methods in pancreaticoduodenectomy. There is ongoing debate regarding the most effective anastomotic method for reducing delayed gastric emptying after pancreaticoduodenectomy. This study aims to identify factors that influence delayed gastric emptying after pancreaticoduodenectomy and assess the impact of different anastomotic methods on delayed gastric emptying.

METHODS

The study included 1,077 patients who had undergone either hand-sewn anastomosis (n = 734) or stapled anastomosis (n = 343) during pancreaticoduodenectomy between December 2016 and November 2021 at our department. We retrospectively analyzed the clinical data, and a 1:1 propensity score matching was performed to balance confounding variables.

RESULTS

After propensity score matching, 320 patients were included in each group. Compared with the stapled anastomosis group, the hand-sewn anastomosis group had a significantly lower incidence of delayed gastric emptying (28 [8.8%] vs 55 [17.2%], P = .001) and upper gastrointestinal tract bleeding (6 [1.9%] vs 17 [5.3%], P = .02). Additionally, the hand-sewn anastomosis group had a significantly reduced postoperative length of stay and lower hospitalization expenses. However, the hand-sewn anastomosis group had a significantly longer operative time, which was consistent with the analysis before propensity score matching. Logistic regression analysis showed that stapled anastomosis, intra-abdominal infection, and clinically relevant postoperative pancreatic fistula were independent prognostic factors for delayed gastric emptying.

CONCLUSION

Hand-sewn anastomosis was associated with a lower incidence rate of clinically relevant delayed gastric emptying after pancreaticoduodenectomy. Stapled anastomosis, intra-abdominal infection, and clinically relevant postoperative pancreatic fistula could increase the incidence of postoperative clinically relevant delayed gastric emptying. Hand-sewn anastomosis should be considered by surgeons to reduce the occurrence of postoperative delayed gastric emptying and improve patient outcomes.

Radiographic duodenal invasion is associated with poor prognosis and early recurrence in patients with pancreatic ductal adenocarcinoma

BACKGROUND

The prognostic impact of radiographic duodenal invasion (rDI) of pancreatic ductal adenocarcinoma (PDAC) has yet to be fully elucidated. This retrospective study aimed to investigate the prognostic and clinicopathological significance of rDI in patients with PDAC after pancreatoduodenectomy (PD).

MATERIALS AND METHODS

We retrospectively analyzed 223 consecutive patients with resectable (R) and borderline resectable (BR)-PDAC that underwent up-front PD between 2002 and 2018. rDI was assessed by preoperative multi-detector row computed tomography.

RESULTS

Ninety-three (42%) patients with PDAC had rDI, and all of them had pathological DI (pDI). The rDI(+) group had larger tumor size, BR-PDAC was more common, there was higher serum CA19-9 level, and microscopic lymphovascular invasion was more common than in the rDI(-) group. rDI was associated with significant reduction in overall survival (OS) (P < 0.001) and recurrence-free survival (RFS) (P < 0.001). In multivariate analysis, rDI was an independent prognostic factor in OS [hazard ratio (HR) = 0.52; 95% confidence interval (CI) 0.38-0.73, P < 0.001] and RFS [HR = 0.56; 95% CI 0.40-0.78, P = 0.001]. rDI was also an independent risk factor for early recurrence within 12 months [odds ratio (OR) = 0.36; 95% CI 0.18-0.73, P = 0.005]. rDI had positive correlation with liver recurrence (P = 0.024).

CONCLUSION

Biological aggressiveness of PDAC with rDI implies short OS and early recurrence with frequent liver metastasis. Aggressive perioperative chemotherapy is recommended to improve prognosis, especially for R-PDAC patients with rDI.

Preoperative and postoperative complications as risk factors for delayed gastric emptying following pancreaticoduodenectomy: A single-center retrospective study

BACKGROUND

Mortality rates after pancreaticoduodenectomy (PD) have significantly decreased in specialized centers. However, postoperative morbidity, particularly delayed gastric emptying (DGE), remains the most frequent complication following PD.

AIM

To identify risk factors associated with DGE after the PD procedure.

METHODS

In this retrospective, cross-sectional study, clinical data were collected from 114 patients who underwent PD between January 2015 and June 2018. Demographic factors, pre- and perioperative characteristics, and surgical complications were assessed. Univariate and multivariate analyses were performed to identify risk factors for post-PD DGE.

RESULTS

The study included 66 males (57.9%) and 48 females (42.1%), aged 33-83 years (mean: 62.5), with a male-to-female ratio of approximately 1.4:1. There were 63 cases (55.3%) of PD and 51 cases (44.7%) of pylorus-preserving pancreatoduodenectomy. Among the 114 patients who underwent PD, 33 (28.9%) developed postoperative DGE. Univariate analysis revealed significant differences in four of the 14 clinical indexes observed: pylorus preservation, retrocolonic anastomosis, postoperative abdominal complications, and early postoperative albumin (ALB). Logistic regression analysis further identified postoperative abdominal complications [odds ratio (OR) = 4.768, P = 0.002], preoperative systemic diseases (OR = 2.516, P = 0.049), and early postoperative ALB (OR = 1.195, P = 0.003) as significant risk factors.

CONCLUSION

Postoperative severe abdominal complications, preoperative systemic diseases, and early postoperative ALB are identified as risk factors for post-PD DGE.

Delayed gastric emptying after pylorus-preserving pancreatoduodenectomy: Comparison between traditional open surgery and full-robotic approach with da Vinci Xi

INTRODUCTION

Delayed gastric emptying (DGE) is a frequent complication after pancreatoduodenectomy, especially after pylorus preservation (Pp). We evaluated the effect of a fully robotic approach with da Vinci Xi on DGE after PpPD.

METHODS

Open and robotic PDs were performed in 353 and 50 cases, respectively, from January 2009 to March 2022. We compared the clinical outcomes and incidence of clinically relevant DGE between robotic PpPD (R-PpPD) and open PpPD after one-to-one case-control matching.

RESULTS

Each group consisted of 30 patients. Clinically relevant DGE was less common after R-PpPD (3/30 [10%] vs. 10/30 cases [33.3%], p = 0.028). The median length of hospital stay (LoS) was significantly lower in the R-PpPD group (10 vs. 15 days, p = 0.013).

CONCLUSION

The reduced tissue trauma by the minimally invasive robotic approach is associated with a lower incidence of DGE, reducing the LoS and encouraging PpPD performed using the fully robotic approach.

Delayed gastric emptying after pancreatoduodenectomy: One complication, two different entities

BACKGROUND

Delayed gastric emptying (DGE) is a common complication after pancreatoduodenectomy associated with a low complication burden but a prolonged hospital stay. The present study aimed to characterize DGE, with a particular focus on its subtypes and related predictors.

METHODS

A 2-center retrospective analysis was performed including consecutive pancreatoduodenectomy over 5 years. Primary delayed gastric emptying (pDGE) and secondary delayed gastric emptying (sDGE) were defined according to the presence of concomitant causing factors. Predictors of DGE, pDGE and sDGE were assessed through logistic regression.

RESULTS

Out of 1,170 patients considered, 188 developed delayed gastric emptying (16.1%). Most DGE (71.8%) were secondary. sDGE resolved later (P = .007), with hospital stay, duration of total parenteral nutrition, and of enteral nutrition being longer than for pDGE (all P < .005). Smoking status, total operative time, indication for surgery other than pancreatic cancer, estimated blood loss, and soft pancreatic texture were independent predictors of DGE. In the subgroup analysis of pDGE, smoking was the only independent predictor, whereas pylorus-preservation was a protective factor. Smoking, indication for surgery, estimated blood loss, soft gland texture, and main pancreatic duct diameter were independent predictors of sDGE.

CONCLUSION

DGE after pancreatoduodenectomy consists of 2 different subtypes. The primary form resolves earlier, and its occurrence might be reduced by pylorus preservation. For the secondary form, clinicians should focus on preventing and treating other trigger complications. The diagnosis of the DGE subtype has critical therapeutic implications and paves the way for further systematic studies.

Positive drain fluid culture on postoperative day 1 predicts clinically relevant pancreatic fistula in early drain removal with higher drain fluid amylase after pancreaticoduodenectomy

BACKGROUND

This study aimed to clarify the risk factors of clinically relevant pancreatic fistula after early drain removal with higher drain fluid amylase after pancreaticoduodenectomy. Clinical evaluation of early drain removal with a higher drain fluid amylase after pancreaticoduodenectomy has been controversial. The safety and effectiveness have not been sufficiently examined.

METHODS

Between 2015 and 2020, prophylactic surgical drains were prospectively removed on postoperative day 4 regardless of drain fluid amylase level in 364 study-eligible patients who underwent pancreaticoduodenectomy. Patients were classified according to drain fluid amylase on postoperative day 1: 281 patients with drain fluid amylase <4,000 U/L, and 83 patients with drain fluid amylase ≥4,000 U/L.

RESULTS

Clinically relevant pancreatic fistula occurred in 40 of 364 enrolled patients (11.0%). In the entire cohort, male, positive postoperative day 1 drain fluid culture, and postoperative day 1 drain fluid amylase ≥4,000 U/L were independent risk factors for clinically relevant pancreatic fistula after early drain removal. When stratifying by 4,000 U/L of postoperative day 1 drain fluid amylase, the rate of clinically relevant pancreatic fistula in postoperative day 1 drain fluid amylase <4,000 U/L was significantly lower than that in postoperative day 1 drain fluid amylase ≥4,000 U/L (4% vs 35%, P < .001) after early drain removal. Moreover, in postoperative day 1 drain fluid amylase <4,000 U/L, positive postoperative day 1 drain fluid culture did not develop clinically relevant pancreatic fistula after early drain removal. However, in postoperative day 1 drain fluid amylase ≥4,000 U/L, multivariate analysis clarified that positive postoperative day 1 drain fluid culture was the only independent risk factor of clinically relevant pancreatic fistula after early drain removal (odds ratio 26.27, 95% confidence interval 5.59-123.56, P = .001).

CONCLUSION

Positive drain fluid culture on postoperative day 1 might predict clinically relevant pancreatic fistula in early drain removal with a higher drain fluid amylase.

Three-Year Observation of Glucose Metabolism After Pancreaticoduodenectomy: A Single-Center Prospective Study in Japan

CONTEXT

The glucose tolerance of patients changes considerably from before to after pancreaticoduodenectomy wherein approximately half of the pancreas is resected.

OBJECTIVE

The aim of this prospective study was to investigate the incidence of and risk factors for diabetes after pancreaticoduodenectomy.

METHODS

This study is a part of an ongoing prospective study, the Kindai Prospective Study on Metabolism and Endocrinology after Pancreatectomy (KIP-MEP) study. Of the 457 patients enrolled to date, 96 patients without diabetes who underwent pancreaticoduodenectomy were investigated in this study. Preoperatively, 1 month post-pancreaticoduodenectomy, and every 6 months thereafter, the glucose metabolism and endocrine function were evaluated using the 75 g oral glucose tolerance test. Various other metabolic, endocrine, and exocrine indices were also examined over a period of up to 36 months.

RESULTS

Of the 96 patients analyzed in this study, 33 were newly diagnosed with diabetes. The cumulative diabetes incidence at 36 months following pancreaticoduodenectomy was 53.8%. The preoperative insulinogenic index and ΔC-peptide in the glucagon stimulation test were significantly lower in the progressors to diabetes than in the nonprogressors. Multivariate Cox regression analysis demonstrated that the insulinogenic index was the only significant risk factor for new-onset diabetes.

CONCLUSION

The majority of patients developed new-onset diabetes after pancreaticoduodenectomy, and a low value of the insulinogenic index was suggested to be a risk factor for diabetes. Preoperative assessment for the prediction of the onset of diabetes serves as useful information for patients and is important for postoperative glycemic control and diabetes management in patients who require pancreaticoduodenectomy.

Delayed gastric emptying after classical Whipple or pylorus-preserving pancreatoduodenectomy: a randomized clinical trial (QUANUPAD)

PURPOSE

Pylorus-preserving pancreatoduodenectomy (PPPD) has been the gold standard for pancreatic head lesion resection for several years. Some studies have noted that it involves more delayed gastric emptying (DGE) than classical Whipple (i.e., pancreatoduodenectomy with antrectomy). Our working hypothesis was that the classical Whipple has a lower incidence of DGE. We aimed to compare the incidence of DGE among pancreatoduodenectomy techniques.

METHODS

This pragmatic, randomized, open-label, single-center clinical trial involved patients who underwent classical Whipple (study group) or PPPD (control group). Gastric emptying was clinically evaluated using scintigraphy. DGE was defined according to the International Study Group of Pancreatic Surgery (ISGPS) criteria. The secondary endpoints were postoperative morbidity, length of hospital stay, anthropometric measurements, and nutritional status.

RESULTS

A total of 84 patients were randomized (42 per group). DGE incidence was 50% (20/40, 95% confidence interval (95% CI): 35-65%) in the study group and 62% (24/39, 95% CI: 46-75%) in the control group (p = 0.260). No differences were observed between both groups regarding postoperative morbidity or length of hospital stay. Anthropometric measurements at 6 months post-surgery: triceps fold measurements were 12 mm and 16 mm (p = 0.021). At 5 weeks post-surgery, triceps fold measurements were 13 mm and 16 mm (p = 0.020) and upper arm circumferences were 26 cm and 28 cm (p = 0.030). No significant differences were observed in nutritional status.

CONCLUSION

DGE incidence and severity did not differ between classical Whipple and PPPD. Some anthropometric measurements may indicate a better recovery with PPPD.

TRIAL REGISTRATION

ClinicalTrials.gov Identifier: NCT03984734.

Impaired nitrergic relaxation in pyloric sphincter of the 6-OHDA Parkinson's disease rat

Patients with Parkinson's disease (PD) often suffer from delayed gastric emptying, but the underlying mechanism remains unclear. We have shown previously that a PD rat model comprising bilateral substantia nigra destruction by 6-hydroxydopamine (6-OHDA rats) exhibits gastroparesis with alteration of neural nitric oxide synthase (nNOS) and acetylcholine in gastric corpus. However, changes in pyloric motility in the 6-OHDA rats have not been characterized. Solid gastric emptying test, immunofluorescence, Western blot, and in vitro pyloric motility recordings were used to assess pyloric motor function in the 6-OHDA rats. The 6-OHDA-treated rats displayed delayed solid gastric emptying and a lower basal pyloric motility index. In the 6-OHDA rats, high K⁺-induced transient contractions were weaker in pyloric sphincters. Electric field stimulation (EFS)-induced pyloric sphincter relaxation was lower in the 6-OHDA rats. N^G-nitro-l-arginine methyl ester (l-NAME), a nonselective inhibitor of NOS, markedly inhibited the EFS-induced relaxation in both control and 6-OHDA rats. Pretreatment of tetrodotoxin abolished the effect of EFS on the pyloric motility. In addition, nNOS-positive neurons were extensively distributed in the pyloric myenteric plexus, whereas the number of nNOS-immunoreactive neurons and the protein expression of nNOS were significantly decreased in the pyloric muscularis of 6-OHDA rats. However, sodium nitroprusside-induced pyloric relaxations were similar between the control and 6-OHDA rats. These results indicate that the pyloric sphincters of 6-OHDA rats exhibit both weakened contraction and relaxation. The latter may be due to reduced nNOS in the pyloric myenteric plexus. The dysfunction of the pyloric sphincter might be involved in the delayed gastric emptying.NEW & NOTEWORTHY Reduced nitrergic neurons in pyloric myenteric plexus potently contributed to the attenuated relaxation in 6-hydroxydopamine (6-OHDA) rats, subsequently affecting gastric emptying. SNP could well improve the relaxation of pylori in 6-OHDA rats. The present study provides new insight into the diagnosis and treatment of delayed gastric emptying in patients with PD.

The impact of gastrojejunostomy orientation on delayed gastric emptying after pancreaticoduodenectomy: a single center comparative analysis

BACKGROUND

Delayed gastric emptying (DGE) represents the most frequent complication after pancreaticoduodenectomy (PD). Aim of this study was to evaluate the impact of gastrojejunostomy (GJ)orientation on DGE incidence after PD.

METHODS

One-hundred and twenty-one consecutive PDs were included in the analysis and divided in the horizontal (H-GJ group) and vertical GJ anastomosis groups (V-GJ group). Postoperative data and the value of the flow angle between the efferent jejunal limb and the stomach of the GJ anastomosis at the upper gastrointestinal series were registered.

RESULTS

Seventy-five patients (62%)underwent H-GJ, while 46 patients (38%)underwent V-GJ. The incidence of DGE was significantly lower in the V-GJ group as compared to the H-GJ group (23.9%vs45.3%; p = 0.02). V-GJ was also associated to a less severe DGE manifestation (p = 0.006). The flow angle was significantly lower in case of V-GJ as compared to H-GJ (24.5°vs37°; p = 0.002). At the multivariate analysis, ASA score≥3 (p = 0.02), H-GJ (p = 0.03), flow angle>30°(p = 0.004) and Clavien-Dindo≥3 (p = 0.03) were recognized as independent prognostic factors for DGE. These same factors were independent prognostic features also for a more severe DGE manifestation.

CONCLUSION

VGJ and the more acute flow angle appear to be associated to a lower incidence rate and severity of DGE. This modified technique should be considered by surgeons in order to reduce postoperative DGE occurrence.

RCTs in der Pankreaschirurgie der letzten 10 Jahre – ein Update

Randomisiert kontrollierte Studien (RCT) stellen eine der wichtigsten Quellen neuer Evidenz für die Behandlung insbesondere onkologischer Patienten dar. Insbesondere auf dem Gebiet der Pankreaschirurgie, wo Komplikationen vergleichsweise häufig und schwerwiegend sind, sind innovative operativ-technische wie auch periinterventionelle Innovationen gefragt, die in der Lage sind, Morbidität und Mortalität zu reduzieren. Trotz der mannigfaltigen methodischen Herausforderungen bei der Durchführung chirurgischer RCTs konnten in den letzten 10 Jahren große und wissenschaftlich hochwertige Studien verzeichnet werden.

Dieser Review gibt einen Überblick über wichtige, bereits abgeschlossene und publizierte, aber auch über interessante und wichtige ausstehende RCTs in der Pankreaschirurgie.

Impact of enhanced recovery protocols after pancreatoduodenectomy: meta-analysis

BACKGROUND

This individual-patient data meta-analysis investigated the effects of enhanced recovery after surgery (ERAS) protocols compared with conventional care on postoperative outcomes in patients undergoing pancreatoduodenectomy.

METHODS

The Cochrane Library, MEDLINE, Embase, Scopus, and Web of Science were searched systematically for articles reporting outcomes of ERAS after pancreatoduodenectomy published up to August 2020. Comparative studies were included. Main outcomes were postoperative functional recovery elements, postoperative morbidity, duration of hospital stay, and readmission.

RESULTS

Individual-patient data were obtained from 17 of 31 eligible studies comprising 3108 patients. Time to liquid (mean difference (MD) -3.23 (95 per cent c.i. -4.62 to -1.85) days; P < 0.001) and solid (-3.84 (-5.09 to -2.60) days; P < 0.001) intake, time to passage of first stool (MD -1.38 (-1.82 to -0.94) days; P < 0.001) and time to removal of the nasogastric tube (3.03 (-4.87 to -1.18) days; P = 0.001) were reduced with ERAS. ERAS was associated with lower overall morbidity (risk difference (RD) -0.04, 95 per cent c.i. -0.08 to -0.01; P = 0.015), less delayed gastric emptying (RD -0.11, -0.22 to -0.01; P = 0.039) and a shorter duration of hospital stay (MD -2.33 (-2.98 to -1.69) days; P < 0.001) without a higher readmission rate.

CONCLUSION

ERAS improved postoperative outcome after pancreatoduodenectomy. Implementation should be encouraged.

The PrEDICT-DGE score as a simple preoperative screening tool identifies patients at increased risk for delayed gastric emptying after pancreaticoduodenectomy

BACKGROUND

Morbidity after Pancreaticoduodenectomy (PD) has remained unchanged over the past decade. Delayed Gastric Emptying (DGE) is a major contributor with significant impact on healthcare-costs, quality of life and, for malignancies, even survival. We sought to develop a scoring system to aid in easy preoperative identification of patients at risk for DGE.

METHODS

The ACS-NSQIP dataset from 2014 to 2018 was queried for patients undergoing PD with Whipple or pylorus preserving reconstruction. 15,154 patients were analyzed using multivariable logistic regression to identify risk factors for DGE, which were incorporated into a prediction model. Subgroup analysis of patients without SSI or fistula (primary DGE) was performed.

RESULTS

We identified 9 factors independently associated with DGE to compile the PrEDICT-DGE score: Procedures (Concurrent adhesiolysis, feeding jejunostomy, vascular reconstruction with vein graft), Elderly (Age>70), Ductal stent (Lack of biliary stent), Invagination (Pancreatic reconstruction technique), COPD, Tobacco use, Disease, systemic (ASA>2), Gender (Male) and Erythrocytes (preoperative RBC-transfusion). PrEDICT-DGE scoring strongly correlated with actual DGE rates (R² = 0.95) and predicted patients at low, intermediate, and high risk. Subgroup analysis of patients with primary DGE, retained all predictive factors, except for age>70 (p = 0.07) and ASA(p = 0.30).

CONCLUSION

PrEDICT-DGE scoring accurately identifies patients at high risk for DGE and can help guide perioperative management.

Risk-Stratified Pancreatectomy Clinical Pathway Implementation and Delayed Gastric Emptying

BACKGROUND

Delayed gastric emptying (DGE) is a frequent complication after pancreaticoduodenectomy (PD) that impairs recovery and quality of life. The purpose of this study was to assess the impact risk-stratified pancreatectomy clinical pathways (RSPCPs) had on delayed gastric emptying (DGE) and identify factors associated with DGE in a contemporary period.

METHODS

A single-institution, prospective database was queried for consecutive PDs during July 2011-November 2019. Using international definitions, DGE rates were compared between periods before and after RSPCPs were implemented in 2016, classifying patients according to their postoperative pancreatic fistula (POPF) risk. Risk factors were analyzed to identify modifiable targets.

RESULTS

Among 724 elective PDs, 552 (76%) were for adenocarcinoma and 172 (24%) for other diagnoses. Of the 197 (27%) patients with DGE, 119 (16%) had type A, 41 (6%) type B, and 38 (5%) type C. In the overall cohort, DGE rates were higher with pylorus-preserving vs. classic hand-sewn reconstruction (odds ratio [OR] - 1.84; p < 0.001), postoperative abscess (OR - 2.54; p = 0.003), and non-white patients (p = 0.007), but lower after implementation of RSPCPs (OR - 0.34, p < 0.001). In the 374 patients treated with RSPCPs, only 17% (n = 65/374) developed DGE. Patients with protocol-compliant NGT removal ≤ 48 h were less likely to experience DGE (OR - 1.46, p = 0.042).

CONCLUSION

Our data suggest that implementation of preoperatively assigned RSPCPs as a care bundle was the most important factor in decreasing DGE. These gains were accentuated in patients who underwent early nasogastric tube removal and had a classic hand-sewn gastro-jejunostomy reconstruction. Application of these modifiable factors is generalizable with low implementation barriers.

Complete circumferential lymphadenectomy around the superior mesenteric artery with preservation of nerve plexus reduces locoregional recurrence after pancreatoduodenectomy for resectable pancreatic ductal adenocarcinoma

BACKGROUND

Evaluation of recurrence pattern and risk factors for recurrence are essential for good rates of survival after upfront pancreatoduodenectomy (PD) for pancreatic ductal adenocarcinoma (PDAC).

METHODS

This retrospective study included 167 consecutive patients who underwent upfront PD for resectable PDAC between 2000 and 2018. Postoperative recurrences were classified into three patterns according to initial recurrence site: isolated locoregional, isolated distant, and simultaneous locoregional and distant recurrences.

RESULTS

This study found 114 patients who developed postoperative recurrence (68.3%), including 37 patients with isolated locoregional recurrence (32.5%), 67 patients with isolated distant recurrence (58.8%), and 10 patients with simultaneous locoregional and distant recurrences (6.0%). When locoregional recurrence was classified based on the location of recurrent lesions, locoregional recurrence most commonly occurred around the superior mesenteric artery (SMA) (70.2%), followed by around the hepatic artery (25.5%) and in the paraaortic region (14.9%). Multivariate analyses showed that complete circumferential lymphadenectomy around the SMA, including not only the right side, but also the left side, was an independent factor for reduction of locoregional recurrence (P = 0.019, odds ratio [OR]: 2.217). Lymph node metastasis was an independent risk factor for both locoregional (P < 0.001, OR: 3.686) and distant recurrences (P < 0.001, OR: 4.315). Non-completion of postoperative adjuvant therapy was a risk factor for distant recurrence (P < 0.001, OR: 3.748).

CONCLUSION

Based on our data, complete circumferential lymphadenectomy around the SMA might contribute to local control, and multidisciplinary treatment including neoadjuvant therapy might be needed for resectable PDAC with high risk for recurrence.

Impact of gastric resection and enteric anastomotic configuration on delayed gastric emptying after pancreaticoduodenectomy: a network meta-analysis of randomized trials

INTRODUCTION

Delayed gastric emptying (DGE) is frequent after pancreaticoduodenectomy (PD). Several RCTs have explored operative strategies to minimize DGE, however, the optimal combination of gastric resection approach, anastomotic route, configuration and the use of enteroenterostomy remains unclear.

METHODS

MEDLINE, Embase and CENTRAL databases were systematically searched for RCTs comparing gastric resection (classic Whipple, pylorus-resecting, pylorus-preserving), anastomotic route (antecolic, retrocolic), configuration (loop gastroenterostomy/Billroth II, Roux-en-Y), and use of enteroenterostomy (Braun). A random-effects, Bayesian network meta-analysis with non-informative priors was conducted to determine the optimal combination of approaches to PD for minimizing DGE.

RESULTS

Twenty-four RCTs, including 2526 patients and 14 approaches were included. There was some heterogeneity, although inconsistency was low. The overall incidence of DGE was 25.6 per cent (647 patients). Pylorus-resecting, antecolic, Billroth II with Braun enteroenterostomy was associated with the lowest rates of DGE and ranked the best in 35 per cent of comparisons. Classic Whipple, retrocolic, Billroth II with Braun ranked the worst for DGE in 32 per cent of comparisons. Pairwise meta-analysis of retrocolic versus antecolic route for gastrojejunostomy found increased risk of DGE with the retrocolic route (odds ratio 2.10, 95 per cent credibility interval (cr.i.) 0.92 to 4.70). Pairwise meta-analysis of enteroenterostomy found a trend towards lower DGE rates when this was used (odds ratio 1.90, 95 per cent cr.i. 0.92 to 3.90). Having a Braun enteroenterostomy ranked the best in 96 per cent of comparisons.

CONCLUSION

Based on existing RCT evidence, a pylorus-resecting, antecolic, Billroth II with Braun enteroenterostomy seems to be associated with the lowest rates of DGE.

PREREGISTRATION

PROSPERO submitted 23 December 2020. CRD42021227637.

Previous upper abdominal surgery is a risk factor for nasogastric tube reinsertion after pancreaticoduodenectomy

BACKGROUND

Pancreaticoduodenectomy without subsequent nasogastric tube management has not been widely adopted due to delayed gastric emptying, the specific and frequent morbidity associated with this surgical procedure. We assessed the feasibility of pancreaticoduodenectomy without use of nasogastric tubes and the risk factors for subsequent nasogastric tube reinsertion.

METHODS

We retrospectively reviewed 465 patients who underwent pancreaticoduodenectomy at a single institution between 2010 and 2019. Primary endpoint was the rate of nasogastric tube reinsertion. Logistic regression analysis was used to determine independent risk factors of nasogastric tube reinsertion and delayed gastric emptying.

RESULTS

The rate of nasogastric tube reinsertion was 10.1% (47/465). The rate of delayed gastric emptying was 9.5% (44/465). Logistic regression analysis identified 4 independent risk factors for nasogastric tube reinsertion: male sex (odds ratio = 4.42; 95% confidence interval 1.50-13.0, P = .007), comorbidity of cardiac ischemia (odds ratio = 3.04; 95% confidence interval 1.05-8.79, P = .041), preoperative cholangitis or cholecystitis (odds ratio = 2.21; 95% confidence interval 1.02-4.76, P = .044), and previous upper abdominal surgery (odds ratio = 8.34; 95% confidence interval 3.07-22.7, P < .001). Independent risk factors for delayed gastric emptying were male sex (odds ratio = 3.20; 95% confidence interval 1.11-9.21, P = .031), comorbidity of cardiac ischemia (odds ratio = 3.81; 95% confidence interval 1.34-10.8, P = .012), concomitant organ resection (odds ratio = 3.99; 95% confidence interval 1.10-14.4, P = .035), and previous upper abdominal surgery (odds ratio = 7.21; 95% confidence interval 2.68-19.4, P < .001).

CONCLUSION

Pancreaticoduodenectomy without use of nasogastric tubes is feasible, but patients with previous upper abdominal surgery require careful postoperative nasogastric tube management.

Comprehensive strategy for perioperative care of pancreaticoduodenectomy according to the risk stratification by pancreatic fistula and delayed gastric emptying

BACKGROUND/OBJECTIVE

Pancreaticoduodenectomy (PD) is highly invasive with unsatisfactory postoperative complication rates. Nutritional and fluid management after major surgery attracts much attention with regard to the reduction in severe postoperative complications. We retrospectively analyzed PD cases and proposed a novel strategy for perioperative fluid and nutritional therapy according to the risk stratification by pancreatic fistula (PF) and delayed gastric emptying (DGE).

METHODS

Between 2003 and 2018, 140 patients underwent PD at our institute of which 134 patients were enrolled. We evaluated the clinicopathological factors affecting severe (≥10%) body weight loss (BWL), factors affecting the incidence of PF and intraabdominal complications (IAC), and factors related to DGE.

RESULTS

Multivariate analysis indicated that male sex, severe PF, and DGE are significant risk factors for BWL ≥10%. PF and IAC were predominantly observed in male patients and those with non-pancreatic cancer. A fluid balance ≥6000 ml on postoperative day 2 was the sole risk factor for primary DGE. Secondary DGE significantly correlated with stomach preserving PD. Importantly, the average BWL was around 15% in grade B or C secondary DGE.

CONCLUSION

Severe postoperative complications resulted in significant BWL. Enteral feeding is unnecessary in cases with a hard pancreas and dilated pancreatic duct if appropriate perioperative fluid management is performed. Secondary DGE followed by PF or IAC is unavoidable to some extent, especially in the case of soft pancreas with a fine pancreatic duct. In such cases, enteral feeding with tube ileostomy should be considered, and stomach preserving PD is likely to be harmful.

Glucose Metabolism After Pancreatectomy: Opposite Extremes Between Pancreaticoduodenectomy and Distal Pancreatectomy

CONTEXT

The rate of glucose metabolism changes drastically after partial pancreatectomy.

OBJECTIVE

This work aims to analyze changes in patients' glucose metabolism and endocrine and exocrine function before and after partial pancreatectomy relative to different resection types (Kindai Prospective Study on Metabolism and Endocrinology after Pancreatectomy: KIP-MEP study).

METHODS

A series of 278 consecutive patients with scheduled pancreatectomy were enrolled into our prospective study. Of them, 109 individuals without diabetes, who underwent partial pancreatectomy, were investigated. Data were compared between patients with pancreaticoduodenectomy (PD, n = 73) and those with distal pancreatectomy (DP, n = 36).

RESULTS

Blood glucose levels during the 75-g oral glucose tolerance test (75gOGTT) significantly decreased after pancreatectomy in the PD group (area under the curve [AUC] -9.3%, P < .01), and significantly increased in the DP population (AUC + 16.8%, P < .01). Insulin secretion rate during the 75gOGTT and glucagon stimulation test significantly decreased after pancreatectomy both in the PD and DP groups (P < .001). Both groups showed similar homeostasis model assessment of insulin resistance (HOMA-IR) values after pancreatectomy. Decrease in exocrine function quality after pancreatectomy was more marked in association with PD than DP (P < .01). Multiple regression analysis indicated that resection type and preoperative HOMA-IR independently influenced glucose tolerance-related postoperative outcomes.

CONCLUSIONS

Blood glucose levels after the OGTT differed markedly between PD and DP populations. The observed differences between PD and DP suggest the importance of individualization in the management of metabolism and nutrition after partial pancreatectomy.

An invaginated pancreaticogastrostomy following subtotal stomach-preserving pancreaticoduodenectomy: A prospective observational study

BACKGROUND/OBJECTIVE

Postoperative pancreatic fistula (POPF) leads to life-threatening complications after pancreaticoduodenectomy (PD). Pancreaticogastrostomy (PG) often adopted as a reconstruction technique after PD to prevent POPF. Delayed gastric emptying (DGE) following PD is the most common complication that compromises the quality of life. Subtotal stomach-preserving PD (SSPPD) preserves the pooling ability of the stomach and minimize the occurrence of DGE. This study aimed to describe our PG technique following SSPPD and evaluate the perioperative outcomes.

METHODS

The study included patients who underwent PG following SSPPD from August 2013 to July 2020 at our institution. An invaginated PG was performed by one-layer eight interrupted sutures with a lost stent. Patients' demographics and perioperative outcomes were documented.

RESULTS

This technique was applied in 72 patients with a median age of 75 years. The median operative time was 342 min. The clinically relevant POPF, DGE and post-pancreatectomy hemorrhage was 4 (5.6%), 5 (6.9%), and 10 (13.9%), respectively. Although the drain fluid amylase concentration on postoperative day 3 was significantly higher in clinically relevant POPF (CR-POPF) positive group (median, 2006 U/L vs. 74 U/L in CR-POPF negative group, p = 0.002), none of the risk factors including disease pathology, pancreatic duct diameter, texture of pancreas and excessive blood loss were significantly associated with CR-POPF. Other morbidity ≥ Clavien-Dindo classification II occurred in 29 patients (40.3%). The 90-days operative mortality was two (2.8%).

CONCLUSIONS

This novel method of one-layer invaginated PG following SSPPD is safe and dependable procedure with acceptable morbidity and mortality.

Complete resection of the gastric antrum decreased incidence and severity of delayed gastric emptying after pancreaticoduodenectomy

BACKGROUND

Delayed gastric emptying (DGE) is the main complication after pancreaticoduodenectomy (PD), but the mechanism is still unclear. The aim of this study was to elucidate the role of complete resection of the gastric antrum in decreasing incidence and severity of DGE after PD.

METHODS

Sprague-Dawley rats were divided into three groups: expanded resection (ER group), complete resection (CR group), and incomplete resection (IR group) of the gastric antrum. The tension (g) of remnant stomach contraction was observed. We analyzed the histological morphology of the gastric wall by different excisional methods after distal gastrectomy. Moreover, patients underwent PD at our department between January 2012 and May 2016 were included in the study. These cases were divided into IR group and CR group of the gastric antrum, and the clinical data were retrospectively analyzed.

RESULTS

The ex vivo remnant stomachs of CR group exhibited much greater contraction tension than others (P < 0.05). The contraction tension of the remnant stomach increased with increasing acetylcholine concentration, while remained stable at the concentration of 10 × 10-5 mol/L. Furthermore, 174 consecutive patients were included and retrospectively analyzed in the study. The incidence of DGE was significantly lower (3.5% vs. 21.3%, P < 0.01) in CR group than in IR group. In addition, hematoxylin-eosin staining analyses of the gastric wall confirmed that the number of transected circular smooth muscle bundles were higher in IR group than in CR group (8.24 ± 0.65 vs. 3.76 ± 0.70, P < 0.05).

CONCLUSIONS

The complete resection of the gastric antrum is associated with decreased incidence and severity of DGE after PD. Gastric electrophysiological and physiopathological disorders caused by damage to gastric smooth muscles might be the mechanism underlying DGE.

A comparative study of postoperative outcomes after stapled versus handsewn gastrojejunal anastomosis for pylorus-resecting pancreaticoduodenectomy

Backgrounds/Aims

A stapler is widely used in various surgeries, and there have been recent attempts to use it for performing duodenojejunostomy and gastrojejunostomy during pancreaticoduodenectomy. This study aimed to compare the postoperative results of handsewn gastrojejunostomy (HGJ) and stapled gastrojejunstomy (SGJ) limited to pylorus-resecting pancreaticoduodenectomy (PrPD) performed by a single surgeon.

Methods

This retrospective study was conducted between January 2014 and March 2020, and included 131 patients who underwent PrPD performed by a single surgeon. Of the total subjects, 90 were in the HGJ group and 41 in the SGJ group.

Results

The mean time of surgery was significantly shorter in the stapled group than in the handsewn group (450.4±75.4 min vs. 397.1±66.5 min, p<0.001). However, there were no significant differences between the groups in the rates of postoperative pancreatic fistula, bile leak, chyle leak, intra-abdominal fluid collection, postoperative bleeding, ileus, Clavien-Dindo, rate of reoperation, and 30-day mortality, including delayed gastric emptying (DGE) (n=11 vs. n=6, p=0.92).

Conclusions

Gastrojejunostomy using a stapler in PrPD reduces the reconstruction time without any increase in the rate of complications, including DGE. Therefore, using a stapler for gastrojejunostomy in pancreaticoduodenectomy is feasible and safe.

Landmark Series in Pancreatic Tumors: Anastomotic Techniques and Route of Reconstruction

INTRODUCTION

Pancreaticoduodenectomy is one of the more complicated operations that exists in surgery, and is fraught with potential morbidity, the most well-known, and dreaded, of which is the pancreatic leak. While much of the risk associated with pancreatic leak is inherent to the operation, there have been no shortage of techniques employed by surgeons to try to mitigate that risk.

METHODS

We focused on four topics of greatest conjecture with regard to reconstruction after pancreaticoduodenectomy: (1) the type of anastomosis, (2) the enteral organ to which the pancreas is sewn, (3) whether to preserve the pylorus and (4) whether or not to use anastomotic silastic stents. We identified the most relevant randomized control trials on each topic, which were appropriately powered.

RESULTS

We identified a total of 15 studies for evaluation, (type of anastomosis: n = 4; enteral organ to which the pancreas is sewn: n = 4; whether to preserve the pylorus, n=3; and whether or not to use anastomotic silastic stents, n = 4). In each group of comparisons, there was no definitive conclusion to be made on superiority of reconstruction.

CONCLUSION

While clear consensus on how best to reconstruct the anatomy after pancreaticoduodenectomy has not yet been reached, we present the following review in the hope of providing some understanding of the literature for the pancreatic surgeon.

Effect of Rikkunshito, a Traditional Japanese Herbal Medicine, on Delayed Gastric Emptying and Oral Dietary Intake After Pancreaticoduodenectomy: A Prospective, Randomized, Single-Center, Open-Labeled Study

INTRODUCTION

Delayed gastric emptying (DGE) remains an important problem after pancreaticoduodenectomy (PD). There is a lack of effective treatments for early recovery of oral dietary intake. Rikkunshito (RKT), a Japanese herbal medicine, has been gaining attention as a facilitator of gastric emptying. We evaluated the effects of RKT on DGE after PD.

METHODS

In this prospective, randomized, open-labeled study, patients were randomly allocated before PD in a 1:1 ratio to the RKT group or the control group that received no additional treatment. The RKT group received 2.5 g of RKT three times daily (7.5 g/day) from postoperative day (POD) 1 to POD 21. The primary endpoint was the incidence of DGE. Secondary endpoints were short-term postoperative outcomes including oral dietary intake volume and perioperative changes in levels of the hormones ghrelin and leptin. Patients were observed until hospital discharge.

RESULTS

Twenty-six patients in each group (n = 52) completed the protocol treatment and were included in the analysis set. There were no statistically significant differences in basic characteristics and operative factors. The overall incidence of DGE was not statistically different between the RKT and control groups (30.8% vs 30.8%, p>0.9999). There were no statistically significant differences in the amount of postoperative oral dietary intake represented by total dietary intake (TDI) up to POD 14 and POD 21, complications, and length of hospital stay. No adverse events related to this study were observed. In the RKT group, total ghrelin and acyl-ghrelin were significantly upregulated and leptin was significantly downregulated earlier than in the control group.

CONCLUSION

RKT treatment from POD 1 to 21 did not reduce the incidence of DGE and had no clinically beneficial effect on short-term postoperative outcomes irrespective of changes in hormone levels.

Effect of Billroth-II versus Roux-en-Y reconstruction for gastrojejunostomy after pancreaticoduodenectomy on delayed gastric emptying: A meta-analysis of randomized controlled trials

BACKGROUND/PURPOSE

Delayed gastric emptying (DGE) is one of the most common complications after pancreaticoduodenectomy (PD). The aim of the present meta-analysis was to evaluate the effect of Billroth-II(B-II) versus Roux-en-Y (R-Y) reconstruction for gastrojejunostomy on DGE after PD.

METHODS

A systematic literature search was performed using the electronic database MEDLINE (via PubMed and OVID), EMBASE and Cochrane Central Register of Controlled Trials (CENTRAL) of the Cochrane Library to select pertinent randomized controlled trials (RCTs) on this topic from January 1990 to January 2020. The primary outcome was identified as postoperative DGE. Subgroup analysis was established to compare the incidence of grade B and C DGE. Software Revman 5.3 was used for the statistical analysis, summary statistics were calculated using fixed effect model or random effect model.

RESULTS

Five RCTs including a total of 612 patients were eligible for this meta-analysis. The incidence of grade B and C DGE was significantly lower with the B-II reconstruction than with the R-Y reconstruction (8.0% vs. 14.8%, OR = 0.49, 95% CI: 0.26-0.95, P = 0.03) and the B-II reconstruction took a shorter operation time (WMD=-7.18, 95% CI: [-13.09, -1.27], P = 0,02). No statistically significant difference was found between the two reconstruction methods in terms of the incidence of postoperative pancreatic fistula (POPF), bile leak, intra-abdominal abscess, postoperative pneumonia and the length of postoperative hospital stay.

CONCLUSIONS

B-II reconstruction after PD has a lower incidence of grade B and C DGE and shorter operation time compared with R-Y reconstruction.

Intraoperative endoluminal pyloromyotomy as a novel approach to reduce delayed gastric emptying after pylorus-preserving pancreaticoduodenectomy-a retrospective study

Background

Delayed gastric emptying (DGE) is one of the most common complications after pylorus-preserving partial pancreaticoduodenectomy (ppPD). The aim of this retrospective study was to assess whether an intraoperative pyloromyotomy during ppPD prior to the creation of duodenojejunostomy reduces DGE.

Methods

Patients who underwent pylorus-preserving pancreaticoduodenectomy between January 2015 and December 2017 were divided into two groups on the basis of whether an intraoperative pyloromyotomy was performed (pyloromyotomy (PM) group) or not (no pyloromyotomy (NP) group). The primary endpoint was DGE according to the ISGPS definition. The confirmatory analysis of the primary endpoint was performed with multivariate analysis.

Results

One hundred and ten patients were included in the statistical analysis. Pyloromyotomy was performed in 44 of 110 (40%) cases. DGE of any grade was present in 62 patients (56.4%). The DGE rate was lower in the PM group (40.9%) compared with the NP group (66.7%), and pyloromyotomy was associated with a reduced risk for DGE in univariate (OR 0.35, 95% CI 0.16–0.76; P = 0.008) and multivariate analyses (OR 0.32, 95% CI 0.13–0.77; P = 0.011). The presence of an intra-abdominal complication was an independent risk factor for DGE in the multivariate analysis (OR 5.54, 95% CI 2.00–15.36; P = 0.001).

Conclusion

Intraoperative endoluminal pyloromyotomy during ppPD was associated with a reduced risk for DGE in this retrospective study. Pyloromyotomy should be considered a simple technique that can potentially reduce DGE rates after ppPD.

Is delayed gastric emptying associated with pylorus ring preservation in patients undergoing pancreaticoduodenectomy?

BACKGROUND/OBJECTIVE

A high incidence of delayed gastric emptying (DGE) is observed in patients undergoing pylorus-preserving pancreaticoduodenectomy (PpPD). However, DGE incidence after pancreaticoduodenectomy varied because of heterogeneity in surgical techniques, number of surgeons, and DGE definition. This study aimed to evaluate the difference in the incidence of DGE following PpPD and pylorus-resecting pancreaticoduodenectomy (PrPD) and to analyze the risk factor of DGE by a single surgeon to determine whether pylorus preservation was the main factor of DGE.

METHODS

This retrospective study included 115 patients who underwent PpPD (with pylorus ring preservation) and PrPD (without pylorus ring preservation) with laparotomy by a single surgeon at a tertiary center.

RESULTS

The overall incidence of DGE was 23.1%. For comparison, 20 patients (39.2%) in the PpPD group and 5 patients (8.8%) in the PrPD group had DGE, showing a significant difference (p < 0.001). On univariate analysis, hypertension, PpPD, operation time, intraoperative bleeding, packed red blood cell transfusion ≥500 mL, and clinically relevant postoperative pancreatic fistula were associated with DGE. Multivariate analysis identified pylorus preservation and clinically relevant postoperative pancreatic fistula as risk factors for DGE.

CONCLUSION

Compared with PpPD, PrPD significantly reduced the incidence of DGE.

Delayed gastric emptying after Pancreaticoduodenectomy: a propensity score-matched analysis and clinical Nomogram study

Background

Delayed gastric emptying (DGE) is a common and frustrating complication of pancreaticoduodenectomy (PD). Studies suggest that surgical methods and other clinical characteristics may affect the occurrence of DGE. Nevertheless, the results of such studies are conflicting. The objective of this work was to perform a propensity score matching analysis to compare the differences between pylorus-preserving pancreaticoduodenectomy (PPPD) and pylorus-removing pancreaticoduodenectomy (PrPD) and to develop and validate a nomogram to predict the probability of severe DGE (SDGE).

Methods

This retrospective study enrolled patients who underwent PD at our institution from December 2009 to December 2018. Propensity score matching was applied at a ratio of 1:1 to compare PPPD and PrPD groups. We compared incidence of complications, DGE, lengths of hospital stay, hospitalization costs, and mortality. Univariate and multivariate logistic regression analysis were performed to identify potential risk factors of severe DGE. Finally, a nomogram was developed and validated to predict severe DGE.

Results

The PPPD group had a significantly higher rate of postoperative pancreatic fistula (29.9% versus 17.4%, P < 0.05) and less blood loss (463.7 ml versus 694.9 ml, P < 0.05). After propensity score matching, the PPPD group had a significantly higher rate of postoperative DGE (19.2% versus 3.8%, P < 0.05), especially severe DGE (17.3% versus 0%) than the PrPD group. There were no significant differences in terms of lengths of hospital stay, hospitalization costs or mortality between the groups. Surgical method, biliary leakage, abdominal infection, and diabetes were independent risk factors for SDGE. The nomogram predicted SDGE with a training C - index of 0.798 and a validation C - index of 0.721.

Conclusion

PPPD increases the risk of DGE than PrPD, especially SDGE. Our prediction nomogram gives good prediction of SDGE after pancreaticoduodenectomy.

Chronic Pancreatitis and Nutrition Therapy

Chronic pancreatitis is a complex and irreversible disease of the pancreas and is associated with significant morbidity and mortality. Nutrition deficiencies in chronic pancreatitis are common and can be atypical in nature. As such, the management of these deficiencies can be individualized for patients. The aim of this review is to discuss the components of nutrition deficiencies in chronic pancreatitis, their management, and the current areas of research that are being explored. The clinical guidelines of major national and international societies were analyzed for recommendations on the nutrition management of chronic pancreatitis. The etiology of nutrition deficiencies in chronic pancreatitis is multifactorial and includes aspects of exocrine and/or endocrine dysfunction, significant abdominal pain, often persistent alcohol consumption, and increased metabolic activity. A large number of patients with nutrition deficiencies are underrecognized and undertreated. Although the majority of these patients can be managed by oral and pancreatic enzyme supplementation, some patients may require enteral tube feeding and, in rare cases, parenteral feeding. Current areas of research include the accurate identification of patients at risk for nutrition deficiencies, optimization of feeding regimens, and research into islet cell autotransplantation.