Risk factor analysis and prevention of postoperative pancreatic fistula after distal pancreatectomy with stapler use. J Hepatobiliary Pancreat Sci. 2013;20:538-544. [PMID: 23430057 DOI: 10.1007/s00534-013-0596-0]

Serosal Patching with Glubran®2 on the Pancreatic Stump for Reducing Postoperative Pancreatic Fistulae After Robot-Assisted Distal Pancreatectomy: A Single-Center Retrospective Study

BACKGROUND

Postoperative pancreatic fistulae (POPFs) are a significant cause of morbidity following left pancreatectomy. We hypothesized that incorporating serosal patching with the application of a synthetic sealant, a modified cyanoacrylate (Glubran®2), to the pancreatic stump, would decrease the incidence rate of clinically significant POPFs.

METHODS

This is a retrospective study of consecutive patients who underwent robot-assisted left pancreatectomy. The primary outcome was clinically significant POPFs within 90 days of surgery. Secondary outcomes included the incidence rate of POPFs (all the grades), 90-day morbidity, and 90-day mortality.

RESULTS

We compared outcomes between Glubran®2 sealant with serosal patching (GSP, n = 6) and Glubran®2 sealant without serosal patching (GNSP, n = 12) groups. The GSP group had significantly lower incidence rates of clinically significant POPFs (grades B/C) (p = 0.034) and overall POPFs (all the grades) (p = 0.046). No significant differences in 90-day postoperative morbidity were observed between the two groups (p = 0.56), and no 90-day mortality occurred in either group.

CONCLUSIONS

Incorporating serosal patching along with Glubran®2 sealant in the management of the pancreatic stump during left pancreatectomy demonstrates promising results in reducing the incidence rate of clinically significant POPFs. This finding highlights the need for further research with larger sample sizes in order to confirm the observed outcomes and explore the long-term implications for postoperative complications and recovery in patients undergoing this procedure during pancreatic surgery.

A single-center prospective analysis of the impact of glucose metabolism on pancreatic fistula onset after pancreaticoduodenectomy for periampullary tumors

BACKGROUND

Glucose impairment notably affects the postoperative course of gastrointestinal surgeries. However, evidence on its impact on clinically relevant pancreatic fistulas(CR-POPFs) after pancreaticoduodenectomy(PD) is lacking. This study evaluates if and how preoperative glucose metabolism affects the development of CR-POPF after PD.

METHODS

One hundred and ten consecutive PDs were included. Patients underwent preoperative metabolic profiling using the Oral Glucose Tolerance Test(OGTT) and the hyperinsulinemic euglycemic clamp procedure. Accordingly, patients were categorized as normal glucose tolerant (NGT), impaired glucose tolerant (IGT), diabetic (DM), and longstanding-DM. Receiver operating characteristics(ROC) analyses were performed to determine the values of metabolic features in prediction of CR-POPF.

RESULTS

The CR-POPF rate was 36.3 ​%(40 patients). NGT patients had a higher CR-POPF rate (51.7 ​%) compared to IGT(45.2 ​%), DM (15.8 ​%), and longstanding-DM (25.8 ​%) (p ​= ​0.03). CR-POPF patients had lower median fasting glucose levels (p ​= ​0.01) and higher c-peptide values at all OGTT time points (p ​< ​0.05). Fasting glucose and c-peptide levels had high diagnostic accuracy for CR-POPF (AUC>0.8) and were independent risk factors for CR-POPF (OR: 24.7[95%CI: 3.7-165.3] for fasting glucose; OR: 19.9[95%CI: 3.2-125.3] for c-peptide).

CONCLUSION

Normoglycemia and normal beta cell function may be risk factors for CR-POPF after PD. Fasting glucose and c-peptide levels effectively predicted CR-POPF development following PD.

CLINICALTRIALS GOV IDENTIFIER

NCT02175459.

Appropriate linear stapler selection for avoiding postoperative pancreatic fistula after distal pancreatectomy: A retrospective cohort study

BACKGROUND

Despite the progress in surgical techniques and perioperative managements, the incidence of postoperative pancreatic fistula (POPF) after distal pancreatectomy (DP) remains high. Recently, pancreatic dissection using a linear stapler has been widely performed; however, risk factors influencing the occurrence of POPF after DP using a liner stapler is not fully understood. The purpose of this paper was to evaluate whether the relations between staple height and pancreatic thickness or main pancreatic duct (MPD) diameter influenced the incidence of POPF.

METHODS

Patients who underwent DP without other organ resections between 2015 and 2022 were retrospectively reviewed. Compression Index (CI) was defined as staple height/pancreatic thickness, and Suturing Index (SI) was defined as staple height/ MPD diameter.

RESULTS

In 51 patients undergoing DP, 16 patients (31.4%) developed POPF. ROC analyses revealed that lower CI and higher SI significantly increased the incidence of POPF, and the cutoff values were 0.186 and 0.821, respectively. Univariate and multivariate analyses revealed that CI ≤ 0.186 and SI ≥ 0.821 were independent risk factors for POPF after DP. Moreover, the incidence of POPF in patients fulfilling both CI > 0.186 and SI < 0.821 was 5.9%, which was extremely lower than in those without fulfilling the criteria (44.1%), suggesting that this new criteria in combination with CI and SI was an excellent predictor of POPF.

CONCLUSIONS

It is possible that stapler cartridge selection using our new criteria in combination with CI and SI may reduce the incidence of POPF.

Prolonged pre-firing pancreatic compression with linear staplers in distal pancreatectomy: a valuable technique for post-operative pancreatic fistula prevention

PURPOSE

Post-operative pancreatic fistula (POPF) remains the main complication after distal pancreatectomy (DP). The aim of this study is to evaluate the potential benefit of different durations of progressive stapler closure on POPF rate and severity after DP.

METHODS

Patients who underwent DP between 2016 and 2023 were retrospectively enrolled and divided into two groups according to the duration of the stapler closure: those who underwent a progressive compression for < 10 min and those for ≥ 10 min.

RESULTS

Among 155 DPs, 83 (53.5%) patients underwent pre-firing compression for < 10 min and 72 (46.5%) for ≥ 10 min. As a whole, 101 (65.1%) developed POPF. A lower incidence rate was found in case of ≥ 10 min compression (34-47.2%) compared to < 10 min compression (67- 80.7%) (p = 0.001). When only clinically relevant (CR) POPFs were considered, a prolonged pre-firing compression led to a lower rate (15-20.8%) than the < 10 min cohort (32-38.6%; p = 0.02). At the multivariate analysis, a compression time of at least 10 min was confirmed as a protective factor for both POPF (OR: 5.47, 95% CI: 2.16-13.87; p = 0.04) and CR-POPF (OR: 2.5, 95% CI: 1.19-5.45; p = 0.04) development. In case of a thick pancreatic gland, a prolonged pancreatic compression for at least 10 min was significantly associated to a lower rate of CR-POPF compared to < 10 min (p = 0.04).

CONCLUSION

A prolonged pre-firing pancreatic compression for at least 10 min seems to significantly reduce the risk of CR-POPF development. Moreover, significant advantages are documented in case of a thick pancreatic gland.

Comparison of outcomes with stapler versus hand-sewn closure of the pancreatic stump following minimally invasive distal pancreatectomy: a retrospective cohort study

Background:

Pancreatic fistula after distal pancreatectomy is a common and potentially lethal complication. The optimal closure method for the pancreatic remnant during minimally invasive distal pancreatectomy (MDP) remains unclear.

Methods:

Data of consecutive patients who underwent MDP in our institution between July 2018 and June 2021 were collected. The outcomes of MDP with stapler and hand-sewn closure were compared. The primary outcome was clinically relevant postoperative pancreatic fistula (CR-POPF) per the International Study Group of Pancreatic Surgery definition.

Results:

Of the 384 patients (stapler closure, 339; hand-sewn closure, 45) enrolled, 249 developed CR-POPF (grades B and C: 242 and 7 patients, respectively). The rates of grade B and grade C POPF in the stapler group were similar to the corresponding rates in the hand-sewn group (64.6% and 1.5% vs 51.1% and 4.4%, P = .078 and P = .223, respectively). No differences between the stapler and hand-sewn groups were observed regarding the median operation time (207 vs 222 minutes, P = .139), incidence of major complications (16.5% vs 20.0%, P = .559), and mortality (0.2% vs 0%, P = 1.000). The independent risk factors of CR-POPF were abdominal abscess, prolonged operation time, and transection site (P = .004, .006, and .001, respectively).

Conclusion:

The incidence and severity of CR-POPF by stapler closure of the pancreatic stump were comparable to those associated with hand-sewn closure in MDP in this retrospective cohort. Randomized controlled trials are needed to verify this finding.

External validation of fistula risk scores for postoperative pancreatic fistula after distal pancreatectomy

BACKGROUND

Fistula risk scores such as distal fistula risk scores and DISPAIR have been recently developed to assess the risk of clinically relevant postoperative pancreatic fistula after distal pancreatectomy. This study aimed to validate these models externally using a large-scale Chinese cohort.

METHODS

The study enrolled adult patients who underwent distal pancreatectomy at a high-volume single center between January 2011 and December 2021. The clinically relevant postoperative pancreatic fistula was defined as grade B/C, according to the 2016 International Study Group of Pancreatic Surgery. Model performance was evaluated using the area under the curve.

RESULTS

Among 653 eligible patients, 126 (19.3%) suffered from clinically relevant postoperative pancreatic fistulas. Independent predictors for clinically relevant postoperative pancreatic fistulas included body mass index, diabetes mellitus, pancreatic thickness at both neck and transection sites, main pancreatic duct diameter, and soft pancreas. Clinically relevant postoperative pancreatic fistula risk increased with increasing score severity. All 3 prediction models showed acceptable discrimination, with area under the curve values of preoperative distal fistula risk score at 0.723 (95% confidence interval 0.687-0.757), intraoperative distal fistula risk score at 0.737 (95% confidence interval 0.701-0.770), and DISPAIR at 0.721 (95% confidence interval 0.685-0.755). No significant differences were found among them.

CONCLUSION

Distal fistula risk scores and DISPAIR are useful tools for predicting clinically relevant postoperative pancreatic fistula after distal pancreatectomy, highlighting their importance in guiding surgical approach decisions and mitigating strategies against this complication in clinical practice.

Effects of ketorolac on complications and postoperative pancreatic fistula in patients undergoing pancreatectomy

BACKGROUND

There are conflicting data on the risk of postoperative pancreatic fistula (POPF) associated with postoperative NSAID use. The primary objective of this multi-center retrospective study was to assess the relationship between ketorolac use and POPF. The secondary objective was to assess for effect of ketorolac use on overall complication rate.

METHODS

Retrospective chart review of patients undergoing pancreatectomy from January 1, 2005-January 1, 2016 was performed. Data on patient factors (age, sex, comorbidities, previous surgical history etc.), operative factors (surgical procedure, estimated blood loss, pathology etc.), and outcomes (morbidities, mortality, readmission, POPF) were collected. The cohort was compared based on ketorolac use.

RESULTS

The study included 464 patients. Ninety-eight (21%) patients received ketorolac during the study period. Ninety-six (21%) patients were diagnosed with POPF within 30 days. There was a significant association between ketorolac use and clinically relevant POPF (21.4 vs. 12.7%) (p = 0.04, 95% CI [1.76, 1.04-2.97]). There was no significant difference in overall morbidity or mortality between the groups.

DISCUSSION

Though there was no overall increase in morbidity, there was a significant association between POPF and ketorolac use. The use of ketorolac after pancreatectomy should be judicious.

Development and external validation of DISPAIR fistula risk score for clinically relevant postoperative pancreatic fistula risk after distal pancreatectomy

BACKGROUND

Highly utilized risk scores for clinically relevant postoperative pancreatic fistula (CR-POPF) have guided clinical decision-making in pancreatoduodenectomy. However, none has been successfully developed for distal pancreatectomy. This study aimed to develop and validate a new fistula risk score for distal pancreatectomy.

METHODS

Patients undergoing distal pancreatectomy at Helsinki University Hospital, Finland from 2013 to 2021, and at Karolinska University Hospital, Sweden, from 2010 to 2020, were included retrospectively. The outcome was CR-POPF, according to the 2016 International Study Group of Pancreatic Surgery definition. Preoperative clinical demographics and radiological parameters such as pancreatic thickness and duct diameter were measured. A logistic regression model was developed, internally validated with bootstrapping, and the performance assessed in an external validation cohort.

RESULTS

Of 668 patients from Helsinki (266) and Stockholm (402), 173 (25.9 per cent) developed CR-POPF. The final model consisted of three variables assessed before surgery: transection site (neck versus body/tail), pancreatic thickness at transection site, and diabetes. The model had an area under the receiver operating characteristic curve (AUROC) of 0.904 (95 per cent c.i. 0.855 to 0.949) after internal validation, and 0.798 (0.748 to 0.848) after external validation. The calibration slope and intercept on external validation were 0.719 and 0.192 respectively. Four risk groups were defined in the validation cohort for clinical applicability: low (below 5 per cent), moderate (at least 5 but below 30 per cent), high (at least 30 but below 75 per cent), and extreme (75 per cent or more). The incidences in these groups were 8.7 per cent (11 of 126), 22.0 per cent (36 of 164), 63 per cent (57 of 91), and 81 per cent (17 of 21) respectively.

CONCLUSION

The DISPAIR score after distal pancreatectomy may guide decision-making and allow a risk-adjusted outcome comparison for CR-POPF.

An analysis of the effectiveness of stapler closure combined with a titanium clip in distal pancreatectomy

PURPOSES

Postoperative pancreatic fistula is the most common and severe postoperative complication of distal pancreatectomy. Treatment of pancreatic stump to reduce the incidence of postoperative pancreatic fistula is crucial. This study evaluated the effectiveness of stapler closure combined with a titanium clip in distal pancreatectomy.

METHODS

Prospectively collected data of consecutive patients who underwent distal pancreatectomy from April 2013 to May 2020 with pancreatic transection performed by the bare stapler method (131 patients), stapler + hand-sewn closure method (199 patients), and stapler + titanium clip method (209 patients) were reviewed retrospectively and compared between groups.

RESULTS

No statistically significant differences were observed in basic data among the three groups. There were also no significant differences among the three groups in terms of the intraoperative data or tumor pathological types, except for the number of laparoscopic treatment cases (23, 53, and 80 for bare stapler method, stapler + hand-sewn closure method, and stapler + titanium clip method, respectively; P < 0.05) and pancreatic neuroendocrine tumor cases (15, 29, and 12, respectively; P < 0.05). There were no significant differences in postoperative complications or parameters, except for the number of clinical pancreatic fistula cases (31, 27, and 13 for bare stapler method, stapler + hand-sewn closure method, and stapler + titanium clip method, respectively; P < 0.05) and postoperative length of hospital stay (11.6 ± 8.3, 10.6 ± 9.7, and 9.3 ± 6.9 days, respectively; P < 0.05). The stapler + titanium clip group had a significantly lower number of clinical pancreatic fistula cases and shorter postoperative length of hospital stay than the other groups. The univariate analysis showed that pancreatic resection line thickness was an independent risk factor for clinical pancreatic fistula after operation.

CONCLUSION

Stapler closure combined with titanium clips to reinforce the pancreatic stump is simple and easy to implement, effectively reduces the incidence of clinical pancreatic fistula, and shortens the postoperative length of hospital stay.

Geriatric nutritional risk index as a potential prognostic marker for patients with resectable pancreatic cancer: a single-center, retrospective cohort study

In pancreatic cancer, postoperative complications (POCs) are associated with disease outcomes. The geriatric nutritional risk index (GNRI) is known to predict POCs after pancreatoduodenectomy (PD) or distal pancreatectomy (DP) in patients with hepatobiliary pancreatic tumors, including pancreatic cancer. Through POC occurrence risk, we aimed to determine whether GNRI could predict prognosis in patients who underwent PD or DP for resectable pancreatic cancer. This retrospective study examined 139 patients who underwent radical pancreatectomy for resectable pancreatic cancer at Ehime University. All patients were subjected to nutritional screening using GNRI and were followed up for POC diagnosis and patient outcomes such as overall survival (OS). Patients were divided based on the GNRI value of 99 (Low group: N = 74, GNRI < 99; High group: N = 65, GNRI ≥ 99), which was determined by receiver operating characteristic curve analysis. Multivariate analysis showed that GNRI < 99 was statistically correlated with POCs after curative pancreatic resection (p = 0.02). Univariate and multivariate analyses confirmed that GNRI < 99 was significantly associated with long OS (p = 0.04). GNRI could be a potential prognostic marker for resectable pancreatic cancer after curative pancreatic resection despite being a simple and noninvasive approach.

The pancreas-to-muscle signal intensity ratio on T1-weighted MRI as a predictive biomarker for postoperative pancreatic fistula after distal pancreatectomy: a single-center retrospective study

BACKGROUND

Postoperative pancreatic fistula (POPF) is one of the serious complications of pancreatic surgery. When POPF occurs and becomes severe, it causes secondary complications and a longer treatment period. We previously reported a correlation between pancreatic fibrosis and magnetic resonance imaging (MRI) findings, and MRI may have the potential to predict POPF. This study aimed to assess the predictive ability of the pancreas-to-muscle signal intensity ratio on T₁-weighted MRI (SIR on T₁-w MRI) for POPF after distal pancreatectomy (DP).

METHODS

This single-institution retrospective study comprised 117 patients who underwent DP. It was conducted between 2010 and 2021 at the Gifu University Hospital. We statistically analyzed pre-, intra-, and postoperative factors to assess the correlation with POPF.

RESULTS

According to the definition and grading of the International Study Group of Pancreatic Fistula (ISGPF), 29 (24.8%) of the 117 patients had POPF grades B and C. In the univariate analysis, POPF was significantly associated with the pancreas-to-muscle SIR on T₁-w MRI, the drainage fluid amylase concentration (D-Amy) levels on postoperative day (POD) 1 and 3, white blood cell count on POD 1 and 3, C-reactive protein level on POD 3, and heart rate on POD 3. In multivariate analysis, only the pancreas-to-muscle SIR on T₁-w MRI (>1.37; odds ratio [OR] 23.25; 95% confidence interval [CI] 3.93-454.03; p < 0.01) and D-Amy level on POD 3 (>737 U/l; OR 3.91; 95% CI 1.02-16.36; p = 0.046) were identified as independent predictive factors.

CONCLUSIONS

The pancreas-to-muscle SIR on T₁-w MRI and postoperative D-Amy levels were able to predict the development of POPF after DP. The pancreas-to-muscle SIR on T₁-w MRI may be a potential objective biomarker reflecting pancreatic status.

Fibrin glue injection method for complex fistula after laparoscopic distal pancreatectomy: a case report

BACKGROUND

Pancreatic fistula is the most problematic complication in pancreatectomy. Although drainage can be used to relieve this complication, pancreatic surgeons often encounter refractory pancreatic fistula. Fibrin glue injection, with the use of a twofold diluted solution B and a double-lumen tube, was found effective in treating this complicated pancreatic fistula.

CASE PRESENTATION

We report the case of a 64-year-old Japanese man who underwent laparoscopic distal pancreatectomy for pancreatic tail cancer. After initial drainage of the pancreatic fistula diagnosed 4 days postoperatively, on day 134, refractory pancreatic fistula was observed using contrast-enhanced computed tomography. We used fibrin glue injection, with a twofold diluted solution containing thrombin and calcium chloride and a double-lumen tube, for treating the refractory fistula; the fluid drainage was almost stopped with no fever or abdominal pain. No recurrence of pancreatic cancer has been observed since the procedure.

CONCLUSIONS

Fibrin glue injection was effective for complicated pancreatic fistula after distal pancreatectomy. Using a twofold diluted solution B containing thrombin and calcium chloride and a double-lumen tube makes possible the thorough injection of fibrin glue.

Early Predictive Factors for Postoperative Pancreatic Fistula After Distal Pancreatectomy for Pancreatic Cancer

BACKGROUND/AIM

Postoperative pancreatic fistula (POPF) is the most serious complication of distal pancreatectomy (DP). When POPF occurs and becomes severe, it causes secondary complications and leads to a longer treatment period. This study aimed to identify early predictive factors of POPF after DP for pancreatic cancer (PC).

PATIENTS AND METHODS

This retrospective, single-institution study comprised of 55 patients with PC who underwent DP between 2010 and 2021 at the Gifu University Hospital. We statistically analyzed pre-, intra-, and post-operative factors to identify early predictive factors for POPF.

RESULTS

According to the definition and grading of the International Study Group of Pancreatic Fistula (ISGPF), 12 (21.8%) of 55 patients had POPF grades B and C. In the univariate analysis, POPF was significantly associated with the pancreas-to-muscle signal intensity ratio on T ₁ -weighted magnetic resonance imaging (SIR on T ₁ -w MRI), the drainage fluid amylase (D-Amy) levels on postoperative day 3 (POD3), C-reactive protein (CRP) on POD3, and heart rate on POD3. In multivariate analysis, pancreas-to-muscle SIR on T ₁ -w MRI [>1.37; odds ratio (OR)=17.08; 95% confidence interval (CI)=1.64-598.16; p=0.02], D-Amy levels on POD3 (>1,200 U/l; OR=20.00; 95% CI=1.73-563.83; p=0.02) and heart rate on POD3 (>100 bpm; OR=15.33; 95% CI=1.53-258.45; p=0.02) were identified as independent early predictive factors.

CONCLUSION

Preoperative pancreas-to-muscle SIR on T ₁ -w MRI and postoperative D-Amy levels and heart rate significantly correlated with POPF after DP for PC. Postoperative management based on these predictive factors may improve the postoperative course.

Risk factor analysis of postoperative pancreatic fistula after distal pancreatectomy, with a focus on pancreas-visceral fat CT value ratio and serrated pancreatic contour

BACKGROUND

In pancreaticoduodenectomy, the pancreas-visceral fat CT value ratio and serrated pancreatic contour on preoperative CT have been revealed as risk factors for postoperative pancreatic fistulas. We aimed to evaluate whether they could also serve as risk factors for postoperative pancreatic fistulas after distal pancreatectomy.

METHODS

A total of 251 patients that underwent distal pancreatectomy at our department from 2006 to 2020 were enrolled for the study. We retrospectively analyzed risk factors for postoperative pancreatic fistulas after distal pancreatectomy using various pre and intraoperative factors, including preoperative CT findings, such as pancreas-visceral fat CT value ratio and serrated pancreatic contour.

RESULTS

The study population included 147 male and 104 female participants (median age, 68 years; median body mass index, 21.4 kg/m²), including 64 patients with diabetes mellitus (25.5%). Preoperative CT evaluation showed a serrated pancreatic contour in 80 patients (31.9%), a pancreatic thickness of 9.3 mm (4.0-22.0 mm), pancreatic parenchymal CT value of 41.8 HU (4.3-22.0 HU), and pancreas-visceral fat CT value ratio of - 0.41 (- 4.88 to - 0.04). Postoperative pancreatic fistulas were developed in 34.2% of the patients. Univariate analysis of risk factors for postoperative pancreatic fistulas showed that younger age (P = 0.005), high body mass index (P = 0.001), absence of diabetes mellitus (P = 0.002), high preoperative C-reactive protein level (P = 0.024), pancreatic thickness (P < 0.001), and high pancreatic parenchymal CT value (P = 0.018) were significant risk factors; however, pancreas-visceral fat CT value ratio (P = 0.337) and a serrated pancreatic contour (P = 0.122) did not serve as risk factors. Multivariate analysis showed that high body mass index (P = 0.032), absence of diabetes mellitus (P = 0.001), and pancreatic thickness (P < 0.001) were independent risk factors.

CONCLUSION

The pancreas-visceral fat CT value ratio and serrated pancreatic contour evaluated using preoperative CT were not risk factors for postoperative pancreatic fistulas after distal pancreatectomy. High body mass index, absence of diabetes mellitus, and pancreatic thickness were independent risk factors, and a close-to-normal pancreas with minimal fat deposition or atrophy is thought to indicate a higher risk of postoperative pancreatic fistulas after distal pancreatectomy.

The impact of preoperative anemia on pancreatic resection outcomes

BACKGROUND

Preoperative anemia is a risk factor for blood transfusions and delayed postoperative recovery, but few data are available for pancreatic surgery. Aim of the study was to analyze the impact of preoperative anemia on outcomes after pancreatic resection.

METHODS

Retrospective review of 1107 patients resected at San Raffaele Hospital (2015-2018). Preoperative anemia was defined as hemoglobin lower than 130 g/L for men and 120 g/L for women. Primary outcome was 90-day comprehensive complication index (CCI). Analysis was stratified according to type of surgery; proximal resections (pancreaticoduodenectomy and total pancreatectomy) versus distal pancreatectomy.

RESULTS

In 776 proximal resection patients, preoperative anemia was associated with increased CCI (24 ± 25 vs. 19 ± 23, p = 0.018) and perioperative allogenic blood transfusions (n = 124, 46% vs. n = 129, 26%; p < 0.001). Multivariate analysis showed that anemia was associated with a 7% (95%CI 0.02-0.57 p = 0.047) increase in CCI, and was an independent factor associated with perioperative blood transfusion (OR 2.762, 95%CI 1.72-4.49, p < 0.001). In 331 distal pancreatectomies, anemia was not associated to increased morbidity but only to an increased risk of perioperative blood transfusion.

CONCLUSION

Preoperative anemia is an independent risk factor for increased complication severity and blood transfusion in patients undergoing major pancreatic resection.

Incidence and impact of postoperative pancreatic fistula after minimally invasive and open distal pancreatectomy

BACKGROUND

Previous studies reported a higher rate of postoperative pancreatic fistula after minimally invasive distal pancreatectomy compared to open distal pancreatectomy. It is unknown whether the clinical impact of postoperative pancreatic fistula after minimally invasive distal pancreatectomy is comparable with that after open distal pancreatectomy. We aimed to compare not only the incidence of postoperative pancreatic fistula, but more importantly, also its clinical impact.

METHODS

This is a post hoc analysis of a multicenter randomized trial investigating a possible beneficial impact of a fibrin patch on the rate of clinically relevant postoperative pancreatic fistula (International Study Group for Pancreatic Surgery grade B/C) after distal pancreatectomy. Primary outcomes of the current analysis are the incidence and clinical impact of postoperative pancreatic fistula after both minimally invasive distal pancreatectomy and open distal pancreatectomy.

RESULTS

From October 2010 to August 2017, 252 patients undergoing distal pancreatectomy were randomized, and data of 247 patients were available for analysis: 87 minimally invasive distal pancreatectomy and 160 open distal pancreatectomies. The postoperative pancreatic fistula rate after minimally invasive distal pancreatectomy was significantly higher than that after open distal pancreatectomy (28.7% vs 16.9%, P = .029). More patients were discharged with an abdominal surgical drain after minimally invasive distal pancreatectomy compared to open distal pancreatectomy (30/87, 34.5% vs 26/160, 16.5%, P = .001). In patients with postoperative pancreatic fistula, additional percutaneous catheter drainage procedures were performed less often (52% vs 84.6%, P = .012), with fewer drainage procedures (median [range], 2 [1-4] vs 2, [1-7], P = .014) after minimally invasive distal pancreatectomy.

CONCLUSION

In this post hoc analysis, the postoperative pancreatic fistula rate after minimally invasive distal pancreatectomy was higher than that after open distal pancreatectomy, whereas the clinical impact was less.

Optimal management of peripancreatic fluid collection with postoperative pancreatic fistula after distal pancreatectomy: Significance of computed tomography values for predicting fluid infection

Peripancreatic fluid collections have been observed in most patients with postoperative pancreatic fistula after distal pancreatectomy; however, optimal management remains unclear. This study aimed to evaluate the management and outcomes of patients with postoperative pancreatic fistula and verify the significance of computed tomography values for predicting peripancreatic fluid infections after distal pancreatectomy. We retrospectively investigated 259 consecutive patients who underwent distal pancreatectomy. Grade B postoperative pancreatic fistula patients were divided into two subgroups (B-antibiotics group and B-intervention group) and outcomes were compared. Predictive factor analysis of peripancreatic fluid infection was performed. Clinically relevant postoperative pancreatic fistulas developed in 88 (34.0%) patients. The duration of hospitalization was significantly longer in the B-intervention (n = 54) group than in the B-antibiotics group (n = 31; 41 vs. 17 days, p < 0.001). Computed tomography values of the infected peripancreatic fluid collections were significantly higher than those of the non-infected peripancreatic fluid collections (26.3 vs. 16.1 Hounsfield units, respectively; p < 0.001). The outcomes of the patients with grade B postoperative pancreatic fistulas who received therapeutic antibiotics only were considerably better than those who underwent interventions. Computed tomography values may be useful in predicting peripancreatic fluid collection infection after distal pancreatectomy.

Review of minimally invasive pancreas surgery and opinion on its incorporation into low volume and resource poor centres

Pancreatic surgery has been one of the last areas for the application of minimally invasive surgery (MIS) because there are many factors that make laparoscopic pancreas resections difficult. The concept of service centralization has also limited expertise to a small cadre of high-volume centres in resource rich countries. However, this is not the environment that many surgeons in developing countries work in. These patients often do not have the opportunity to travel to high volume centres for care. Therefore, we sought to review the existing data on MIS for the pancreas and to discuss. In this paper, we review the evolution of MIS on the pancreas and discuss the incorporation of this service into low-volume and resource-poor countries, such as those in the Caribbean. This paper has two parts. First, we performed a literature review evaluating all studies published on laparoscopic and robotic surgery of the pancreas. The data in the Caribbean is examined and we discuss tips for incorporating this operation into resource poor hospital practice. Low pancreatic case volume in the Caribbean, and financial barriers to MIS in general, laparoscopic distal pancreatectomy, enucleation and cystogastrostomy are feasible operations to integrate in to a resource-limited healthcare environment. This is because they can be performed with minimal to no consumables and require an intermediate MIS skillset to complement an open pancreatic surgeon’s peri-operative experience.

Efficacy of the slow firing method using a reinforced triple-row stapler for preventing postoperative pancreatic fistula during laparoscopic distal pancreatectomy

PURPOSE

Postoperative pancreatic fistula (POPF) remains the most clinically relevant complication of laparoscopic distal pancreatectomy (LDP). The present study evaluated the efficacy of the "slow firing method" using a reinforced triple-row stapler (Covidien, Tokyo, Japan) during LDP.

METHODS

This retrospective single-center study included 73 consecutive patients who underwent LDP using the slow firing method. A black cartridge was used in all patients. The primary endpoint was the rate of clinically relevant POPF (CR-POPF) after LDP. Secondary endpoints included perioperative outcomes and factors associated with CR-POPF as well as the correlation between the transection time and thickness of the pancreas.

RESULTS

Four patients (5.5%) developed CR-POPF (grade B). Overall morbidity rates, defined as grade ≥ II and ≥ III according to the Clavien-Dindo classification, were 21 and 11%, respectively. The median postoperative hospital stay was 10 days. Preoperative diabetes (13.6 vs. 0.2%, P = 0.044) and thickness of the pancreas ≥ 15 mm (13.8% vs. 0%, P = 0.006) were identified as independent risk factors for CR-POPF. The median transection time was 16 (8-29) min.

CONCLUSION

The slow firing method using a reinforced triple-row stapler for pancreatic transection is simple, safe, and effective for preventing CR-POPF after LDP.

Optimal stapler cartridge selection to reduce post-operative pancreatic fistula according to the pancreatic characteristics in stapler closure distal pancreatectomy

BACKGROUND

Postoperative pancreatic fistula (POPF) is associated with potentially fatal complications, but there is lack of data on relationship between pancreas thickness, and stapler size and the POPF rate. This study aimed to suggest optimal stapler that reduces POPF rate according to the pancreas thickness.

METHODS

This retrospective cohort study was conducted in two tertiary high-volume pancreas centers. 599 patients who underwent distal pancreatectomy were assessed for stump reinforcement methods, pathology findings, pancreas thickness, and cartridge used. The cartridges were grouped as I, II, III according to the closed height ≤1.5 mm, 1.8 mm, and ≥2.0 mm, respectively.

RESULTS

The POPF rate increased according to the thickness. The stapler Groups I, II, and III had an overall POPF rate of 66.4% vs. 61.7% vs. 57.8%, but Group II stapler cartridge showed a significant reduction in the POPF rate than other cartridges in pancreas with thickness <13 mm (53.5% vs. 21.7% vs. 36.0%, p = 0.031). There was no significant difference between the POPF rate according to stapler groups when the pancreas was thicker than 13 mm.

CONCLUSION

Thickness is the strongest risk factor in predicting POPF. Use of Group II stapler cartridge for pancreas with a thickness of <13 mm can help reduce POPF.

Investigation of intraoperative factors associated with postoperative pancreatic fistula following laparoscopic left pancreatectomy with stapled closure: a video review-based analysis : Video-review for predictors of pancreatic leak

INTRODUCTION

Postoperative pancreatic fistula (POPF) following distal pancreatectomy (DP) remains the most frequent complication, potential precursor of more serious events, and mechanisms behind POPF development are not clear. Primary aim of the current study is to investigate correlations between patients' characteristics, including technical intraoperative data assessed by retrospective video review of laparoscopic DP (L-PD), and development of clinically relevant (CR-)POPF and major complication.

METHODS

Patients undergoing L-DP whose surgery video was available for review were included in this study. Retrospective video review, performed by two surgeons blinded for postoperative outcomes, was focused on pancreatic neck transection and identification of pancreatic capsule disruption (PCD)/staple line bleeding (SLB). Correlation between clinical, demographic, and intraoperative factors and CR-POPF/major complications and assessment of factors associated with PCD and SLB were investigated.

RESULTS

Of 41 L-DP performed at our institution (June 2015-June 2020) using a triple-row stapler (EndoGIA™ Reloads with Tri-Staple™), surgery video was available for 38 patients [men/women, 13/25; median age (range) 62 (25-84) years; median BMI (range) 24 (17-42)]. PCD and SLB occurred in 15(39%) and 19(50%) patients and were concomitant in 9(24%). CR-POPF and major complications occurred in 8(21%) and 12(31%) patients, respectively. PCD, SLB, and PCD + SLB rates were significantly higher among patients with CR-POPF, compared to patients without (all p < 0.05). Among patients with PCD, pancreatic thickness at pancreatic transection site was higher (19 mm), compared to non-PCD patients (13 mm, p < 0.001). A directly proportional relation between PCD, CR-POPF, and major complication rate and pancreatic thickness was confirmed by ROC analysis (AUC = 0.949, 0.798, and 0.740, respectively).

CONCLUSION

PCD and SLB close to the staple line detected by retrospective video-review are intraoperatively detectable indicators of severe pancreatic traumatism and a potential precursors of CR-POPF following L-PD. Given the strict correlation between PCD and pancreatic thickness, alternative techniques to stapled closure for pancreatic transection may be recommended for patients with a thick pancreas and modification in postoperative care may be considered in patients with PCD/SLB.

Risk Factors for Clinically Relevant Postoperative Pancreatic Fistula (CR-POPF) after Distal Pancreatectomy: A Single Center Retrospective Study

OBJECTIVES

Clinically relevant postoperative pancreatic fistula (CR-POPF) is the considerable contributor to major complications after pancreatectomy. The purpose of this study was to evaluate the potential risk factor contributing to CR-POPF following distal pancreatectomy (DP) and discuss the risk factors of pancreatic fistula in order to interpret the clinical importance.

METHODS

In this retrospective study, 263 patients who underwent DP at Ningbo Medical Center Li Huili Hospital between January 2011 and January 2020 were reviewed in accordance with relevant guidelines and regulations. Patients' demographics and clinical parameters were evaluated using univariate and multivariate analyses to identify the risk factors contributing to CR-POPF. P < 0.05 was considered statistically significant.

RESULTS

In all of the 263 patients with DP, pancreatic fistula was the most common surgical complication (19.0%). The univariate analysis of 18 factors showed that the patients with a malignant tumor, soft pancreas, and patient without ligation of the main pancreatic duct were more likely to develop pancreatic fistula. However, on multivariate analysis, the soft texture of the pancreas (OR = 2.381, 95% CI = 1.271-4.460, P=0.001) and the ligation of the main pancreatic duct (OR = 0.388, 95% CI = 0.207-0.726, P=0.002) were only an independent influencing factor for CR-POPF.

CONCLUSIONS

As a conclusion, pancreatic fistula was the most common surgical complication after DP. The soft texture of the pancreas and the absence of ligation of the main pancreatic duct can increase the risk of CR-POPF.

Irrigation and passive drainage of pancreatic stump after distal pancreatectomy in high-risk patients: an innovative approach to reduce pancreatic fistula

INTRODUCTION

Postoperative pancreatic fistula (POPF) represents the most common form of morbidity after distal pancreatectomy (DP). The aim of this study was to illustrate an innovative technique of irrigation and passive drainage to reduce clinically relevant POPF (CR-POPF) incidence in high-risk patients undergoing DP.

MATERIAL AND METHODS

Twelve consecutive high-risk patients received irrigation and passive drainage of the pancreatic stump with a Salem sump drainage after DP. The Salem sump was irrigated with 100 ml/h of Ringer solution for 2 postoperative days (POD). In the case of low-drain amylase and lipase levels on POD 3, the irrigation was reduced to 50 ml/h. Persistence of low-drain pancreatic enzymes on POD 4 allowed for interruption of irrigation and subsequent removal of drainage from POD 7 onward in the absence of evidence of any pancreatic fistula.

RESULTS

Overall, 16.6% of the patients experienced a grade 3 or higher surgical complication. We experienced only one case of POPF: the fistula was classified as grade B and it was managed with radiologic drainage of the fluid collection. We did not experience any case of re-operation nor in-hospital mortality.

CONCLUSIONS

Irrigation with passive drainage of the pancreatic stump after DP is an interesting approach for CR-POPF prevention in high-risk patients.

[Predictors of external pancreatic fistulae after pancreatic resection]

Despite a significant decrease in postoperative mortality after pancreatic resections in recent years (5.2-15% after pancreatoduodenectomy and about 5% after distal pancreatectomy), incidence of postoperative complications remains high (30-50% and 22-50%, respectively). Postoperative pancreatic fistula is one of the most common and formidable complications. Currently, most authors use the classification proposed by the International Study Group for Pancreatic Fistula (biochemical failure, fistula type B and C). Prediction of the risk of postoperative fistula is still a complex and unresolved problem of modern surgical pancreatology. According to the literature, the main risk factors of postoperative pancreatic fistulae are obesity and high body mass index, concomitant cardiovascular diseases, no neoadjuvant chemo- and radiotherapy, soft pancreatic texture, narrow pancreatic duct, no fibrotic changes in parenchyma, adipose infiltration of the pancreas, advanced intraoperative blood loss, as well as center experience. Most often, magnetic resonance imaging, computed tomography, ultrasound elastography and various multivariate risk assessment systems are used to estimate the risk of pancreatic fistulae. However, a generally accepted technique does not exist. This manuscript is devoted to analysis of risk factors of postoperative pancreatic fistulae and diagnostic methods for assessment of this risk.

A Novel Radiological Predictor for Postoperative Pancreatic Fistula After Stapled Distal Pancreatectomy

BACKGROUND

Distal pancreatectomy (DP) is the main surgical treatment of benign and malignant lesions located in pancreatic body and tail. Postoperative pancreatic fistula (POPF) following DP is still a considerable cause of morbidity. Identification of risk factors for POPF after DP might provide some preventive applications. We aimed to evaluate the factors affecting POPF after DP and to present a new and easy radiological predictive factor.

MATERIALS AND METHODS

Thirty-four patients underwent DP with stapler closure were included. Several risk factors for clinically relevant POPF (CR-POPF) were analyzed. Additionally, computed tomography findings of pancreatic thickness (PT), main pancreatic duct diameter (MPDD), and PT/MPDD ratio were evaluated for POPF.

RESULTS

CR-POPF was observed in 10 patients (29.4%). Univariate and multivariate analyses showed that previous abdominal surgery and PT/MPDD ratio were predictive factors for CR-POPF after DP (P = 0.040, P = 0.034, respectively). The cutoff value for the PT/MPDD ratio was 8.

CONCLUSION

A PT/MPDD ratio greater than 8 (a wide pancreas with a narrow duct) is a significant predictive factor for CR-POPF following DP.

Blame it on the injury: Trauma is a risk factor for pancreatic fistula following distal pancreatectomy compared with elective resection

BACKGROUND

Postoperative pancreatic fistula (POPF) remains a significant source of morbidity following distal pancreatectomy (DP). There is a lack of information regarding the impact of trauma on POPF rates when compared with elective resection. We hypothesize that trauma will be a significant risk factor for the development of POPF following DP.

METHODS

A retrospective, single-institution review of all patients undergoing DP from 1999 to 2017 was performed. Outcomes were compared between patients undergoing DP for traumatic injury to those undergoing elective resection. Univariate and multivariable analyses were performed using SAS (version 9.4).

RESULTS

Of the 372 patients who underwent DP during the study period, 298 met inclusion criteria: 38 DPs for trauma (TDP), 260 elective DPs (EDP). Clinically significant grade B or C POPFs occurred in 17 (44.7%) of 38 TDPs compared with 41 (15.8%) of 260 EDPs (p < 0.0001). On multivariable analysis, traumatic injury was found to be independently predictive of developing a grade B or C POPF (odds ratio, 4.3; 95% confidence interval, 2.10-8.89). Age, sex, and wound infection were highly correlated with traumatic etiology and therefore were not retained in the multivariable model. When analyzing risk factors for each group (trauma vs. elective) separately, we found that TDP patients who developed POPFs had less sutured closure of their duct, higher infectious complications, and longer hospital stays, while EDP patients that suffered POPFs were more likely to be male, younger in age, and at a greater risk for infectious complications. Lastly, in a subgroup analysis involving only patients with drains left postoperatively, trauma was an independent predictor of any grade of fistula (A, B, or C) compared with elective DP (odds ratio, 8.6; 95% confidence interval, 3.09-24.15), suggesting that traumatic injury is risk factor for pancreatic stump closure disruption following DP.

CONCLUSION

To our knowledge, this study represents the largest cohort of patients comparing pancreatic leak rates in traumatic versus elective DP, and demonstrates that traumatic injury is an independent risk factor for developing an ISGPF grade B or C pancreatic fistula following DP.

LEVEL OF EVIDENCE

Prognostic study, Therapeutic, level III.

Prospective study on predictability of complications by pancreatic surgeons

PURPOSE

We evaluated the intuition of expert pancreatic surgeons, in predicting the associated risk of pancreatic resection and compared this "intuition" to actual operative follow-up. The objective was to avoid major complications following pancreatic resection, which remains a challenge.

METHODS

From January 2015 to February 2018, all patients who were 18 years old or more undergoing a pancreatic resection (pancreaticoduodenectomy [PD], distal pancreatectomy [DP], or central pancreatectomy [CP]) for pancreatic lesions were included. Preoperatively and postoperatively, all surgeons completed a form assessing the expected potential occurrence of clinically relevant postoperative pancreatic fistula (CR-POPF: grade B or C), postoperative hemorrhage, and length of stay.

RESULTS

Preoperative intuition was assessed for 101 patients for 52 PD, 44 DP, and 5 CP cases. Overall mortality and morbidity rates were 6.9% (n = 7) and 67.3% (n = 68), respectively, and 38 patients (37.6%) developed a POPF, including 27 (26.7%) CR-POPF. Concordance between preoperative intuition of CR-POPF occurrence and reality was minimal, with a Cohen's kappa coefficient (κ) of 0.175 (P value = 0.009), and the same result was obtained between postoperative intuition and reality (κ = 0.351; P < 0.001). When the pancreatic parenchyma was hard, surgeons predicted the absence of CR-POPF with a negative predictive value of 91.3%. However, they were not able to predict the occurrence of CR-POPF when the pancreas was soft (positive predictive value 48%).

CONCLUSIONS

This study assessed for the first time the surgeon's intuition in pancreatic surgery, and demonstrated that pancreatic surgeons cannot accurately assess outcomes except when the pancreatic parenchyma is hard.

Relationship between pancreatic thickness and staple height is relevant to the occurrence of pancreatic fistula after distal pancreatectomy

BACKGROUND

A triple-row stapler is widely used to divide the pancreas in distal pancreatectomy (DP). However, the selection criteria of the stapler cartridge to prevent postoperative pancreatic fistula (POPF) remain unclear. The objective of this study was to determine if factors concerning pancreatic thickness or staple size affect POPF after DP.

METHODS

Datasets of patients from the Mayo Clinic and National Cancer Center Hospital East who underwent DP using a triple-row stapler were merged. Risk of POPF was analyzed using clinicopathological variables, including data for pancreatic thickness and staple height. A compression index was defined as the designated staple height (mm) after closure divided by the pancreatic thickness (mm).

RESULTS

Among the 277 patients, POPF occurred in 65 (23%) patients. The median pancreatic thickness was 13.7 mm and the median compression index was 0.137. Multivariable logistic models showed that a greater pancreatic thickness (odds ratio, 1.190, P < 0.001) and a compression index ≤0.160 (odds ratio, 4.754, P < 0.001) were independently related with POPF.

CONCLUSION

In patients undergoing DP using a triple-row stapler, the thickness of the pancreas was related with the occurrence of POPF. Selection of the stapler cartridge with a compression index of ≤0.160 may reduce the occurrence of POPF.

The Impact of Stump Closure Techniques on Pancreatic Fistula Stratified by the Thickness of the Pancreas in Distal Pancreatectomy

BACKGROUND

The purpose of this retrospective study was to evaluate the impact of stump closure techniques on pancreatic fistula (PF) focusing on pancreatic thickness after distal pancreatectomy (DP).

METHODS

A total of 213 patients who underwent DP between 2007 and 2017 were retrospectively reviewed. The risk factors of PF were investigated.

RESULTS

In all patients, age ≥65 years (odds ratio [OR]: 3.60, p = 0.012), operation time ≥300 min (OR: 3.05, p = 0.013) and thickness of transected pancreas (OR: 1.37, p < 0.001) were identified as independent risk factors for clinically relevant PF. A receiver operating curve analysis revealed the optimum cut-off values of thickness to be 14 mm with stapler closure and 17 mm with the clamp-crushing method. There were no significant differences regarding PF between the stapler closure and clamp-crushing methods in the thin (<14 mm) and very thick pancreas (≥17 mm) groups (p = 0.822, p = 0.072). In contrast, stapler closure was the only independent risk factor for developing PF in the moderately thick (≥14, <17 mm) pancreas group (OR: 6.75 and p = 0.004, respectively).

CONCLUSION

The clamp-crushing method was superior to stapler closure for pancreatic transection, especially in patients with moderately thick pancreas.

Is there any different risk factor for clinical relevant pancreatic fistula according to the stump closure method following left-sided pancreatectomy?

Backgrounds/Aims

Consistency on risk factors for postoperative pancreatic fistula (POPF) after left-sided pancreatectomy (LP) according to the stump closure methods has not been revealed. Appropriate surgical stump closure method after LP is still in debate. This study investigates risk factors for POPF according to the closure methods in LP.

Methods

A total of 49 consecutive patients underwent LP with a stapler closure (ST) or hand-sewn closure (HS) between June 2001 and September 2016. The risk factors of pancreatic fistulas were investigated in 49 LPs according to stump closure methods, HS (n=19), and ST (n=30).

Results

There was no significant difference in the incidence of overall POPF (HS 42.1% vs. ST 50.0%) and clinical relevant POPF (CR-POPF) (HS 5.3% vs. ST 6.7%) between two groups. In the ST group, the pancreas was significantly thick in patients with CR-POPF (27 mm vs. 17 mm) and the tumor was also larger (58 mm vs. 27 mm). In the HS group, the operation time was longer in CR-POPF group (515 min vs 292 min). In univariate analysis, wider diameter of the pancreatic duct (27 mm vs 16 mm) was associated with POPF in the HS group. There was no meaningful risk factor for POPF in the ST group.

Conclusions

Incidence of overall POPF between the ST and HS group were clinically insignificant in this study. The thickness of the pancreas and the tumor diameter are factors significantly associated with CR-POPF in the ST group. Long operation time was the only factor associated with CR-POPF in the HS group.

Extremely high white blood cell counts on postoperative day 1 do not predict severe complications following distal pancreatectomy

BACKGROUNDS/AIMS

Distal pancreatectomy(DP) is associated with high morbidity. In clinical practice, postoperative white blood cell(WBC) counts are useful indicators of infection complications. The aim of this study was to determine the relevance of extremely high postoperative day (POD)1 WBC counts after DP and their relationship to perioperative outcomes.

METHODS

From December 2005 to December 2016, data from patients who had open or minimally invasive DP surgery (robot or laparoscopy, MIS) for benign or borderline malignant tumors were retrospectively reviewed. Patients were divided into groups based on POD1 WBC count (>20K, High and <20K, Low) for comparisons.

RESULTS

Twelve patients (4.6%) were categorized into the High group. There were significant differences in age (p=0.019), BMI (p=0.010), and spleen-preserving rate (p=0.002) between the High and Low groups. In binary logistic regression analysis, the risk factors for severe complication was age (p=0.032) and open DP (p=0.005), not POD1 WBC count.

CONCLUSIONS

Extremely high WBC count after POD1 after DP was not associated with severe complications, but was associated with splenectomy. Surgical methods and age were associated with severe complications.

Well-trained gynecologic oncologists can perform bowel resection and upper abdominal surgery safely

Objective

This study was performed to examine the safety of bowel resection and upper abdominal surgery in patients with advanced ovarian cancer performed by gynecologic oncologists after training in a monodisciplinary surgical team.

Methods

We implemented a monodisciplinary surgical team consisting of specialized gynecologic oncologist for advanced ovarian cancer. In the initial learning period in 65 patients with International Federation of Gynecology and Obstetrics (FIGO) III/IV, a gynecologic oncologist who had a certification as a general surgeon trained 2 other gynecologic oncologists in bowel resection and upper abdominal surgery for 4 years. After the initial learning period, the trained gynecologic oncologists performed surgeries without the certificated general surgeon in 195 patients with FIGO III/IV. The surgical outcomes and perioperative complications during the 2 periods were evaluated.

Results

The rates of achieving no gross disease after cytoreductive surgery were 80.0% in the initial learning period and 83.6% in the post-learning period (p=0.560). The incidence of anastomotic leakage after rectosigmoid resection, symptomatic pleural effusion or pneumothorax after right diaphragm resection, and pancreatic fistula after splenectomy with distal pancreatectomy in the 2 periods were 2 of 34 (6.0%), 1 of 33 (3.0%), and 3 of 15 (20.0%) patients in the initial learning period, and 12 of 147 (8.2%), 1 of 118 (0.8%), and 11 of 84 (13.1%) patients in the post-learning period, respectively. There were no significant differences between the 2 groups (p=0.270, p=0.440, p=0.520, respectively).

Conclusion

Bowel resection and upper abdominal surgery can be performed safely by gynecologic oncologists.

Reinforced stapler versus ultrasonic dissector for pancreatic transection and stump closure for distal pancreatectomy: A propensity matched analysis

BACKGROUND

Postoperative pancreatic fistula is the primary contributor to morbidity after distal pancreatectomy. To date, no techniques used for the transection and closure of the pancreatic stump have shown clear superiority over the others. This study aimed to compare the rate of postoperative pancreatic fistula after pancreatic transection conducted with a reinforced stapler versus an ultrasonic dissector after a distal pancreatectomy.

METHOD

Prospectively collected data of consecutive patients who underwent distal pancreatectomy from 2014 to 2017 were reviewed retrospectively. We included distal pancreatectomies in which pancreatic transection was performed by reinforced stapler or ultrasonic dissector; we excluded extended distal pancreatectomies. To overcome the absence of randomization, we conducted a propensity matching analysis according to risk factors for postoperative pancreatic fistula.

RESULTS

Overall, 200 patients met the inclusion criteria. The reinforced stapler was employed in 108 patients and the ultrasonic dissector in 92 cases. After one-to-one propensity matching, 92 patients were selected from each group. The matched reinforced stapler and ultrasonic dissector cohort had no differences in baselines characteristics except for the mini-invasive approach, which was more common in the ultrasonic dissector group (34% vs 51%, P = .025). Overall, 48 patients (26%) developed a postoperative pancreatic fistula, 46 (25%) a grade B postoperative pancreatic fistula, and 2 (1%) a grade C postoperative pancreatic fistula. In the reinforced stapler group, the rate of postoperative pancreatic fistula was 12% (n = 11) and in the ultrasonic dissector group 40% (n = 37) with a P < .001.

CONCLUSION

The results of this study suggest that the use of reinforced stapler for pancreatic transection decreases the risk of postoperative pancreatic fistula. A randomized trial is required to confirm these preliminary data.

Risk Factors of Pancreatic Fistula in Distal Pancreatectomy Patients

Introduction

Benign and malignant lesions of the pancreas located at the body and tail of the pancreas are managed by the standard procedure of distal pancreatectomy (DP). The mortality associated with this procedure is reported as less than 5% in high-volume centers. The major proportion of morbidity is comprised of pancreatic fistula with a reported incidence of 5% to 60%. The most considered risk factors associated with pancreatic fistula formation are soft pancreatic texture, diameter of the pancreatic duct <3 mm, intraoperative blood loss >1000 ml and surgical techniques. Among all these factors, the modifiable factor is the surgical technique. Several surgical techniques have been developed and modified for closure of the pancreatic remnant in the recent past in order to minimize the risk of pancreatic fistula and other complications. The main objective of the study is to analyze the factors associated with formation of pancreatic fistula after distal pancreatectomy.

Patients and Methods

We performed a single-center retrospective study at Aga Khan University Hospital from January 2004 till December 2015. The perioperative and postoperative data of 131 patients who underwent pancreatic resection were recorded by using ICD 9 coding. 45 patients underwent distal pancreatectomy, out of which 38 were included in the study based on inclusion criteria. Variables were grouped into demographics, indications, operative details, and postoperative course. Statistical analysis software (SPSS) was used for analysis. Quantitative variables were presented as mean with standard deviation or median with interquartile range depending on the distribution of data. Study endpoints for the risk factor analysis were surgical morbidity and development of pancreatic fistula. Univariate logistic regressions were performed associated with study endpoints. P value less than 0.05 was considered significant.

Results

Postoperative pancreatic fistula was the most common perioperative morbidity. The significant associated risk factor for pancreatic fistula was multivisceral resection as compared to spleen-preserving distal pancreatectomy (P value 0.039). However, the technique of stump closure when opted for suture techniques was seen to be associated with a higher occurrence of postoperative pancreatic fistula. The mortality rate was 2.6%.

Conclusion

Postoperative pancreatic fistula is the most common complication seen after distal pancreatectomy in our series. Multivisceral resection is associated with a high incidence of pancreatic fistula and is a statistical significant predictor of pancreatic fistula.

Surgical techniques and postoperative management to prevent postoperative pancreatic fistula after pancreatic surgery

Postoperative pancreatic fistula (POPF) is one of the most severe complications after pancreatic surgeries. POPF develops as a consequence of pancreatic juice leakage from a surgically exfoliated surface and/or anastomotic stump, which sometimes cause intraperitoneal abscesses and subsequent lethal hemorrhage. In recent years, various surgical and perioperative attempts have been examined to reduce the incidence of POPF. We reviewed several well-designed studies addressing POPF-related factors, such as reconstruction methods, anastomotic techniques, stent usage, prophylactic intra-abdominal drainage, and somatostatin analogs, after pancreaticoduodenectomy and distal pancreatectomy, and we assessed the current status of POPF. In addition, we also discussed the current status of POPF in minimally invasive surgeries, laparoscopic surgeries, and robotic surgeries.

Visceral Obesity and Open Passive Drainage Increase the Risk of Pancreatic Fistula Following Distal Pancreatectomy

BACKGROUND

The predictive risk factors of clinically relevant pancreatic fistula (CR-PF) following distal pancreatectomy (DP) remain to be identified.

METHODS

This is a retrospective cohort analysis of a single-institution database of patients undergoing DP, taking into account usual demographic, operative, and pathologic variables and visceral fat area (VFA), total muscle area (TMA), and surface muscle index (SMI) measured on preoperative CT scan. The primary end point was CR-PF. All variables associated with a p value < 0.05 on univariate analysis were included in a logistic regression model for multivariate analysis.

RESULTS

From 2012 to 2016, 208 patients operated by 4 pancreatic surgeons underwent DP including 32 (15%) who developed CR-PF. Risk factors of CR-PF on univariate analysis were: BMI ≥ 25 kg/m² (p = 0.050), VFA ≥ 92 cm² (p = 0.006), laparotomy (p = 0.023), main pancreatic duct dilatation (p = 0.035), open passive drainage (versus closed suction drainage) (p = 0.001), and blood loss ≥ 225 ml (p = 0.001). Sarcopenia did not influence the risk of CR-PF (p = 0.076). On multivariate analysis, VFA ≥ 92 cm² (OR 3.14; IC 95% (1.18-8.31), p = 0.022), blood loss ≥ 225 ml (OR: 2.72; IC 95% (1.06-6.96), p = 0.037), and open passive drainage (OR 3.72; IC 95% (1.40-9.87) p = 0.008) were three independent predictive factors of CR-PF. A CR-PF risk score was developed, predicting a 0% risk of CR-PF when no risk factors were present and a 39% risk when the 3 risk factors were present.

CONCLUSIONS

Visceral obesity, blood loss ≥ 225 ml and open passive drainage significantly increase the risk of CR-PF following DP.

Do patients benefit more from robot assisted approach than conventional laparoscopic distal pancreatectomy? A meta-analysis of perioperative and economic outcomes

BACKGROUND/PURPOSE

Robotic approach has improved the ergonomics of conventional laparoscopic distal pancreatectomy (LDP), but whether patients benefit more from robot assisted distal pancreatectomy (RADP) is still controversial. This meta-analysis aims to compare the perioperative and economic outcomes of RADP with LDP.

METHODS

A systematic review of the literature was carried out on PubMed, EMBASE, and the Cochrane Library between January 1990 and March 2017. All eligible studies comparing RADP versus LDP were included. Perioperative and economic outcomes constituted the end points.

RESULTS

13 English studies with 1396 patients were included. Regarding to intraoperative outcomes, RADP was associated with a significant decrease in conversion rate (OR = 0.52; 95%CI: 0.34, 0.78; P = 0.002). Although the spleen-preserving rates were comparable between RADP and LDP, a significant higher splenic vessels conservation rate was observed in the RADP group (OR = 4.71; 95%CI: 1.77, 12.56; P = 0.002). No statistically significant differences were found at operation time, estimated blood loss and blood transfusion rate. Concerning postoperative outcomes, pooled data indicated the overall morbidity, pancreatic fistula and the length of hospital stay did not differ significantly between the RADP and LDP groups. And concerning pathological outcomes, positive margin rate and the number of lymph nodules harvested were comparable between the two groups. The operative cost of RADP was almost double that of LDP (WMD = 2350.2 US dollars; 95%CI: 1165.62, 3534.78; P = 0.0001).

CONCLUSION

RADP showed a slight technical advantage. But whether this benefit is worth twofold cost should be considered by patient's individuation.

Risk factors of postoperative pancreatic fistula after distal pancreatectomy using a triple-row stapler

PURPOSE

Postoperative pancreatic fistula (POPF) is one of the major complications in patients who undergo distal pancreatectomy (DP). Recently, dividing the pancreas by stapler is a commonly performed technique, however, POPF still occurs. Therefore, the purpose of this study was to investigate the risk factors for POPF after DP using a triple-row stapler.

METHODS

A total of 75 patients underwent DP using a triple-row stapler (Endo GIA™ Reloads with Tri-Staple™ Technology 60 mm; COVIDIEN, North Haven, CT, USA) at Yamanashi University from December 2012 to December 2016. The clinical risk factors for POPF after DP using a triple-row stapler were identified based on univariate and multivariate analyses.

RESULTS

Clinical POPF (ISGPF Grade B and C) was seen in 7 of 75 patients (9.3%). The body mass index (BMI) was significantly higher in the patients with POPF (26.8 ± 0.5 kg/m²) compared with the patients without POPF (21.4 ± 0.4 kg/m²; a cut-off value; 25.7 kg/m²). In addition, the patients with POPF were significantly younger than the patients without POPF (56.4 ± 5.6 vs 67.0 ± 1.5; a cut-off value was 57.0 years old).

CONCLUSIONS

BMI and age were found to be significant risk factors for POPF after DP using a triple-row stapler.

In Patients with a Soft Pancreas, a Thick Parenchyma, a Small Duct, and Fatty Infiltration Are Significant Risks for Pancreatic Fistula After Pancreaticoduodenectomy

BACKGROUND

This study sought to characterize soft and hard pancreatic textures radiologically and histologically, and to identify specific risks in a soft pancreas associated with postoperative pancreatic fistula (POPF) formation after pancreaticoduodenectomy (PD).

METHODS

Consecutive 145 patients who underwent PD at a single institution between January 2010 and May 2013 were studied. Pancreatic consistency was intraoperatively judged as soft or hard. Pancreatic configuration was assessed using preoperative CT. Histologic components of the pancreatic stump were evaluated using a morphometric analysis. Clinicopathologic parameters were then analyzed for the risk of clinically relevant POPF.

RESULTS

Compared with patients with a hard pancreas (n = 66), those with a soft pancreas (n = 79) had a smaller main pancreatic duct (MPD) diameter and a larger parenchymal thickness on CT, had a smaller fibrosis ratio and a larger lobular ratio histologically, and developed clinically relevant POPF more frequently (P < 0.001 for all). In patients with a soft pancreas, an MPD diameter <2 mm, a parenchymal thickness ≥10 mm, a lobular ratio <75%, and a fat ratio ≥20% were independently associated with clinically relevant POPF (P < 0.010 for all).

CONCLUSION

In patients with a soft pancreas, a thick parenchyma, a small MPD, and fatty infiltration were strongly associated with clinically relevant POPF after PD.

Risk factors of postoperative pancreatic fistula in patients after distal pancreatectomy: a systematic review and meta-analysis

Postoperative pancreatic fistula (POPF) is a common complication following distal pancreatectomy (DP). However, the risk factors of this complication in patients after DP still remain controversial. The aim of our study is to estimate the association between potential risk factors and POPF. Relevant articles published up to June 21, 2016 were identified via PubMed, EMBASE, Web of Science, and The Cochrane Library. Studies that examined the risk factors of POPF following DP were enrolled. 20 articles (2070 patients) were finally included in this study. The pooled data suggested that patients with soft pancreas, higher Body Mass Index (BMI), blood transfusion, elevated intraoperative blood loss, and longer operative time had a decreased risk for POPF. However, age, gender, malignant pathology, types of stump closure, octreotide therapy, history of diabetes and chronic pancreatitis, splenectomy, multiorgan resection, main duct ligation, preoperative serum albumin levels, PGA felt wrapping, and extended lymphadenectomy could not be regarded as risk factors for POPF. Our analytic data demonstrated that pancreas texture, BMI, blood transfusion, intraoperative blood loss, and operative time were clinical predictor for POPF. This study may assist surgeons to screen patients with high risk of POPF and select appropriate treatment measures.

A novel preoperative predictor of pancreatic fistula using computed tomography after distal pancreatectomy with staple closure

PURPOSE

A thick pancreas has proven to be a conspicuous predictor of pancreatic fistula (PF) following distal pancreatectomy (DP) using staples. Other predictors for this serious surgical complication currently remain obscure. This study sought to identify novel predictors of PF following DP.

METHODS

One hundred and twenty-two patients were retrospectively assessed to determine the correlation between PF occurrence and the clinicopathological findings and radiologic data from preoperative computed tomography (CT). CT assessments included the thickness of the pancreas (TP) and pancreatic CT number (pancreatic index; PI), calculated by dividing the pancreatic CT by the splenic CT density.

RESULTS

Twenty-four patients (19.7%) developed a clinically relevant PF. TP was identified as an independent risk factor for PF in multivariate analyses (odds ratio 1.17; P = 0.0095). In subgroup analyses, a lower PI in a thick pancreas was a significant predictor of PF (P = 0.032). The combination of these two prediction parameters, known as the TP-to-PI ratio (TPIR), showed a significantly better prediction ability than TP alone (area under the receiver operating characteristic curve for the incidence of PF, TPIR 0.80 vs. TP 0.69; P = 0.037).

CONCLUSION

Combining the CT number with TP substantially improves the prediction ability for the incidence of PF following DP with staple use.

Risk factors for postoperative pancreatic fistula after laparoscopic distal pancreatectomy using stapler closure technique from one single surgeon

Laparoscopic distal pancreatectomy (LDP) is a safe and reliable treatment for tumors in the body and tail of the pancreas. Postoperative pancreatic fistula (POPF) is a common complication of pancreatic surgery. Despite improvement in mortality, the rate of POPF still remains high and unsolved. To identify risk factors for POPF after laparoscopic distal pancreatectomy, clinicopathological variables on 120 patients who underwent LDP with stapler closure were retrospectively analyzed. Univariate and multivariate analyses were performed to identify risk factors for POPF. The rate of overall and clinically significant POPF was 30.8% and13.3%, respectively. Higher BMI (≥25kg/m²) (p-value = 0.025) and longer operative time (p-value = 0.021) were associated with overall POPF but not clinically significant POPF. Soft parenchymal texture was significantly associated with both overall (p-value = 0.012) and clinically significant POPF (p-value = 0.000). In multivariable analyses, parenchymal texture (OR, 2.933, P-value = 0.011) and operative time (OR, 1.008, P-value = 0.022) were risk factors for overall POPF. Parenchymal texture was an independent predictive factor for clinically significant POPF (OR, 7.400, P-value = 0.001).