Occurrence Of Postoperative Pancreatic Fistula Research Articles

Pancreatic fistula after gastrectomy. Retrospective single-center analysis

Objective: to determine the frequency and risk factors for postoperative pancreatic fistula (POPF) after gastrectomy. Material and Methods. From January 1, 2018 to October 31, 2023, 198 patients with stage I–III gastric cancer underwent gastrectomy with D2 lymphadenectomy at a Regional Oncological Dispensary. The characteristics of the studied patients were assessed according to a unified protocol. Statistically significant factors influencing the development of POPF were identified. Results. The incidence of POPF was 18.7 % (37/198). It was found that not all pancreatic fistulas were accompanied by acute pancreatitis. Among the patients with POPF, 5 had associated acute pancreatitis: 2 with mild, and 3 with moderate severity; no severe acute pancreatitis was observed. The statistically significant indicator for the occurrence of POPF was the neutrophil-lymphocyte index (p=0.033), in the absence of other infectious phenomena. In addition, the following significant factors were identified: lymphadenopathy of regional lymph nodes (p=0.037), tumor stage (T criterion) (p=0.002), splenectomy (p<0.001), and resection of the pancreas (p<0.001). Conclusion. The frequency of postoperative pancreatic fistulas after gastrectomy was 18.7 %. Statistically significant factors for the development of POPF include resection of the pancreas, splenectomy, lymph node status, tumor size, and depth of invasion. An additional indicator for the development of POPF is an increase in the neutrophil-lymphocyte index 1 day after surgery.

Artificial intelligence for surgical safety during laparoscopic gastrectomy for gastric cancer: Indication of anatomical landmarks related to postoperative pancreatic fistula using deep learning.

Postoperative pancreatic fistula (POPF) is a critical complication of laparoscopic gastrectomy (LG). However, there are no widely recognized anatomical landmarks to prevent POPF during LG. This study aimed to identify anatomical landmarks related to POPF occurrence during LG for gastric cancer and to develop an artificial intelligence (AI) navigation system for indicating these landmarks. Dimpling lines (DLs)-depressions formed between the pancreas and surrounding organs-were defined as anatomical landmarks related to POPF. The DLs for the mesogastrium, intestine, and transverse mesocolon were named DMP, DIP, and DTP, respectively. We included 50 LG cases to develop the AI system (45/50 were used for training and 5/50 for adjusting the hyperparameters of the employed system). Regarding the validation of the AI system, DLs were assessed by an external evaluation committee using a Likert scale, and the pancreas was assessed using the Dice coefficient, with 10 prospectively registered cases. Six expert surgeons confirmed the efficacy of DLs as anatomical landmarks related to POPF in LG. An AI system was developed using a semantic segmentation model that indicated DLs in real-time when this system was synchronized during surgery. Additionally, the distribution of scores for DMP was significantly higher than that of the other DLs (p < 0.001), indicating the relatively high accuracy of this landmark. In addition, the Dice coefficient of the pancreas was 0.70. The DLs may be used as anatomical landmarks related to POPF occurrence. The developed AI navigation system can help visualize the DLs in real-time during LG.

The Impact of Body Mass Index on Multiple Complications, Respiratory Complications, Failure to Rescue and In-hospital Mortality After Laparoscopic Pancreaticoduodenectomy: A Single-Center Retrospective Study.

Background: Pancreaticoduodenectomy serves as the standard surgical treatment for periampullary tumors. Previous studies have suggested that high body mass index (BMI) is associated with an unfavorable prognosis following laparoscopic pancreaticoduodenectomy (LPD). However, the relationship between low BMI and postoperative complications remains unclear. Materials and Methods: A retrospective analysis of clinical data from 1130 patients who underwent LPD between April 2014 and December 2022 was conducted. Multivariate regression and restricted cubic spline analyses were utilized to explore the correlations between BMI and short-term outcomes, with adjustments for potential confounders. Results: Multivariable logistic regression revealed that overweight, obese, or severely underweight patients had an elevated risk of postoperative pancreatic fistula (POPF) compared to those with a normal BMI. Moreover, obesity was significantly correlated with a higher proportion of "failure to rescue." BMI exhibited a J-shaped relationship with respiratory complications and in-hospital mortality, a W-shaped relationship with multiple complications and anastomotic leakage (pancreatic fistula), and a U-shaped association with "failure to rescue" rates. The lowest risk was observed at BMI levels of 20 and 25 kg/m2 for multiple complications and pancreatic fistula, respectively. Conclusion: Both high and low BMI are identified as risk factors for the occurrence of postoperative POPF and in-hospital mortality following LPD. Notably, patients with higher BMI and severe underweight conditions are associated with an increased likelihood of "failure to rescue."

High hand grip strength is a significant risk factor and a useful predictor of postoperative pancreatic fistula following pancreaticoduodenectomy.

Postoperative pancreatic fistula (POPF) is one of the most critical complications of pancreaticoduodenectomy (PD). Studies on predictive factors for POPF that can be identified preoperatively are limited. Recent reports have highlighted the association between the preoperative nutritional status, including sarcopenia, and postoperative complications. We examined preoperative risk factors for POPF after PD, focusing on nutritional indicators. A total of 153 consecutive patients who underwent PD at our institution were enrolled in this study. Preoperative nutritional parameters, including hand grip strength (HGS) and skeletal muscle mass as components of sarcopenia, were incorporated into the analysis. POPFs were categorized according to the International Study Group of Pancreatic Fistula (ISGPF) definition as biochemical (grade A) or clinically relevant (CR-POPF; grades B and C). Thirty-seven of the 153 patients (24.1%) fulfilled the ISGPF definition of CR-POPF postoperatively. In the univariate analysis, the incidence of CR-POPF was associated with male sex, non-pancreatic tumor diseases, a high body mass index, a high HGS and a high skeletal muscle mass index. In the multivariate analysis, non-pancreatic tumor diseases and an HGS ≥23.0 kg were selected as independent risk factors for CR-POPF (P <0.05). A high HGS, a screening tool for sarcopenia, was a risk factor for CR-POPF. It can accurately serve as a useful predictor of POPF risk in patients undergoing PD. These results highlight the potential of sarcopenia to reduce the incidence of POPF and highlight the need to clarify the mechanism of POPF occurrence.

Postoperative Hyperamylasemia (POH) is an Early Predictor of Pancreatic Fistula Occurrence and Severity after Distal Pancreatectomy: Results from a European Multicentric Study.

The aim of this international multicentric study is to characterize postoperative hyperamylasemia (POH) after distal pancreatectomy (DP), with particular focus on its relationship with postoperative pancreatic fistula (POPF) occurrence and severity. The clinical relevance of POH after DP and its relationship with the occurrence and severity of POPF have not been explored yet. All patients undergoing DP for any indication between 2015 and 2021 at three European referral Centers for pancreatic surgery were retrospectively analyzed. Drain fluid amylase (DFA), C-reactive protein (C-RP), and serum amylase were examined from postoperative-day (POD) 1 to 3. Biochemical leak (BL), POPF, POH, and post-pancreatectomy hemorrhage (PPH) were defined and graded according to ISGPS definitions. In total 1192 patients were included. Overall rates of POH and POPF were 18% (n= 210) and 29% (n= 344), respectively. The presence of DFA ≥2000 U/L on POD 1 (OR=2.11, 95% CI 1.68-2.86), C-RP ≥200 mg/L on POD 3 (OR=2.19, 95% CI 1.68-2.86), and POH (OR=1.58, 95% CI 1.14-2.19) were all independent early predictors of POPF (all P< 0.01). The presence of POH almost doubled the rate of POPF (43% vs. 26%, P<0.001), and higher POPF severity presented also higher POH rates (no POPF= 12%; BL= 19%; B POPF= 24%; C POPF= 52%). Among patients developing POPF, patients with POH had higher rates of PPH (22% vs 9%, P= 0.001), sepsis (24% vs 13%; P=0.011), re-operation (21% vs 8%; P< 0.01), and mortality (3% vs 0.3%; P= 0.025). The occurrence of POH is an early predictor of POPF and its severity after DP. The diagnosis of POH might define patients at higher risk for a complicated course, targeting them for prevention / mitigation strategies against pancreas specific complications.

Novel invagination procedure for pancreaticojejunostomy using double purse string sutures: A technical note.

Postoperative pancreatic fistula (POPF) is one of the most serious complications after pancreaticoduodenectomy (PD), and the choice of pancreaticojejunostomy (PJ) is considered a key factor affecting the occurrence of POPF. Numerous anastomotic methods and their modifications have been proposed, and there is no method that can completely avoid the occurrence of POPF. Based on our team's experience in pancreatic surgery and a review of relevant literature, we describe a novel invagination procedure for PJ using double purse string sutures, which has resulted in favourable outcomes. To describe the precise procedural steps, technical details and clinical efficacy of the novel invagination procedure for PJ. This study adopted a single-arm retrospective cohort study methodology, involving a total of 65 consecutive patients who underwent PD with the novel invagination procedure for PJ, including the placement of a pancreatic stent, closure of the residual pancreatic end, and two layers of purse-string suturing. Baseline data included age, sex, body mass index (BMI), pancreatic texture, pancreatic duct diameter, operation time, and blood loss. Clinical outcomes included the operation time, blood loss, and incidence of POPF, postoperative haemorrhage, delayed gastric emptying, postoperative pulmonary infection, postoperative abdominal infection, and postoperative pulmonary infection. The mean age of the patients was 59.12 (± 8.08) years. Forty males and 25 females were included, and the mean BMI was 21.61 kg/m2 (± 2.74). A total of 41.53% of patients had a pancreatic duct diameter of 3 mm or less. The mean operation time was 263.83 min (± 59.46), and the mean blood loss volume was 318.4 mL (± 163.50). Following the surgical intervention, only three patients showed grade B POPF (4.62%), while no patients showed grade C POPF. Five patients (5/65, 7.69%) were diagnosed with postoperative haemorrhage. Six patients (6/65, 9.23%) experienced delayed gastric emptying. Four patients (4/65, 6.15%) developed postoperative pulmonary infection, while an equivalent number (4/65, 6.15%) exhibited postoperative abdominal infection. Additionally, two patients (2/65, 3.08%) experienced postoperative pulmonary infection. The novel invagination technique for PJ is straightforward, yields significant outcomes, and has proven to be safe and feasible for clinical application.

Outcomes of Pancreatic Fistula After Pancreaticoduodenectomy

Background: The occurrence of postoperative pancreatic fistula (POPF) after pancreaticoduodenectomy (PD) is a major contributor to morbidity and mortality. Hence, it is imperative to decrease the occurrence of clinically significant POPF to enhance the overall morbidity outcomes associated with PD. This study seeks to assess the outcomes of pancreatic fistula following PD. Methods: This study was a combined prospective and retrospective analysis of patients who underwent PD at Al-Thawra Modern General Hospital between January 2016 and April 2021. A total of 42 patients were included in the analysis. Results: Among the 42 patients who underwent PD, 40% were male and 60% were female. The age distribution showed that 5% of patients were under 20, 14% were between 20 and 40, and 81% were above 40. The primary indications for PD were malignant periampullary tumors in 83.3% of patients, solid pseudopapillary tumors of the pancreas in 7.1% of patients, chronic pancreatitis in 4.76% of patients, duodenal adenocarcinoma in 2.38% of patients, and trauma in 2.38% of patients. Among the patients, 30 (71.43%) had a successful recovery without evidence of pancreatic fistula (PF), whereas 12 (28.57%) developed POPF. Among the 12 patients with POPF, 3 (7.14%) had a biochemical leak, 5 (11.9%) had a grade B fistula, and 4 (9.53%) had a grade C fistula according to the revised ISGPS definition. Of the patients with POPF, those with a biochemical leak did not experience significant morbidity and were managed conservatively. Patients with grade B fistula (5 patients) had an extended hospital stay of approximately 2-3 weeks and received percutaneous drainage as an intervention. One patient (8.33%) with grade C fistula required reoperation because of bleeding, and 3 patients (25%) developed septic shock and subsequently died, resulting in an overall mortality rate of 25% among patients with POPF. Conclusion: POPF following PD remains a serious complication of substantial morbidity and mortality. Further improvements in the prevention, early detection, and management of POPF are necessary to reduce postoperative morbidity and mortality. Using the ISGPS definition and grading of PF aids in the clinical assessment and management of PF.

Preoperative zinc status predicts the occurrence and healing time of pancreatic fistula after distal pancreatectomy.

There are few studies that examined the relationship between preoperative zinc (Zn) concentrations and postoperative pancreatic fistula (POPF) after distal pancreatectomy (DP). Data from 98 patients who underwent DP between January 2016 and April 2022 were retrospectively reviewed. Patients' clinicopathological and surgical outcomes were analyzed, and we examined the relationship between Zn and clinically relevant POPF (CR-POPF) after DP. In this series, 41 (41.8%) patients had POPF and 31 (31.8%) patients had CR-POPF. The cut-off value for the preoperative Zn concentration was 74μg/dL for POPF and CR-POPF. Patients with low Zn concentrations were significantly related with high age, low albumin concentrations, higher CRP concentrations, higher NLR, lower PNI, higher rates of POPF and CR-POPF, longer POPF healing time, longer hospital stay, and postoperative complications than patients with high Zn concentrations. The healing time of POPF after DP was significantly negatively correlated with serum Zn concentrations. A multivariate logistic regression analysis showed that preoperative lower Zn concentrations and a prolonged operation time were independent predictors of CR-POPF and the healing time of POPF after DP. The POPF healing time in patients with high Zn was significantly shorter than that in patients with low Zn concentrations. This retrospective study showed the association between the preoperative Zn concentrations and the occurrence of POPF and the healing time after DP. Zn is a simple biomarker for malnutrition, which may lead to POPF after DP.

Combined pre-operative risk score predicts pancreatic leak after pancreatic resection.

Post-operative pancreatic fistula (POPF) is a major complication following pancreatectomy and is currently difficult to predict pre-operatively. This study aims to validate pre-operative risk factors and develop a novel combined score for the prediction of POPF in the pre-operative setting. Data were collected from 2016 to 2021 for radiologic main pancreatic duct diameter (MPD), body mass index (BMI), physical status classified by American Society of Anesthesiologists (ASA), polypharmacy, mean platelet ratio (MPR), comorbidity-polypharmacy score (CPS), and a novel Combined Pancreatic Leak Prediction Score (CPLPS) (derived from MPD diameter, BMI, and CPS) were obtained from pre-operative data and analyzed for their independent association with POPF occurrence. In total, 166 patients who underwent pancreatectomy with pancreatic leak (Grade A, B, and C) occurring in 51(30.7%) of patients. Pre-operative radiologic MPD diameter < 4 mm (p < 0.001), < 5 mm (p < 0.001), < 6 mm (p = 0.001), BMI ≥ 25 (p = 0.009), and ≥ 30 (p = 0.017) were independently associated with the occurrence of pancreatic leak. CPLPS was also predictive of pancreatic leak following pancreatectomy on univariate (p = 0.005) and multivariate analysis (p = 0.036). MPD and BMI were independent risk factors predictive for the development of pancreatic leak. CPLPS, was an independent predictor of pancreatic leak following pancreatectomy and could be used to help guide surgical decision making and patient counseling.

Serum amylase on postoperative day one is a strong predictor of pancreatic fistula after pancreaticoduodenectomy: a retrospective cohort.

Early identification of patients at risk for developing postoperative pancreatic fistula (POPF) after pancreaticoduodenectomy (PD) may facilitate drain management. In this context, it was aimed to examine the efficiency of the serum amylase (SA) value on postoperative day (PoD) 1 in predicting the occurrence of POPF. A total of 132 patients who underwent PD were studied. Occurrences of POPF were classified according to the International Study Group on Pancreatic Fistula classification as a biochemical leak (BL) or clinically relevant grade b/c POPF (CR-POPF). Receiver operating characteristic analysis identified a threshold value of SA on PoD 1 associated with POPF formation. Overall, 66 (50%) patients had POPF, including 51 (38.7%) with BL and 15 with CR-POPF (11.3%). The threshold value of SA associated with the development of POPF was 120 IU/L (odds ratio [OR]: 3.20; p = 0.002). In the multivariate analysis, independent POPF risk factors were SA ≥120 IU/L, soft pancreatic texture, and high-risk pathology (i.e., duodenal, biliary, ampullary, islet cell, and benign tumors); SA ≥120 IU/L outperformed soft pancreatic texture and high-risk pathology in predicting POPF, respectively (OR: 2.22; p = 0.004 vs. OR: 1.37; p = 0.012 vs. OR: 1.35; p = 0.018). In a subset analysis according to gland texture (soft vs. hard), patients with soft pancreatic texture exhibited a significantly higher incidence of POPF (63.4% vs. 34.4%) and SA ≥120 IU/L (52.1% vs. 27.9%); SA <120 IU/L had a negative predictive value of 82.5% for developing POPF in patients with hard pancreatic texture (OR: 4.28, p = 0.028). A SA value ≥120 IU/L on the day after PD, which is the strongest predictor for POPF, can be used as a biomarker of the occurrence of POPF. The advantage of SA measurement is that it can contribute to identifying suitable patients for early drain removal.

The Role of C-reactive Protein and Procalcitonin in Predicting the Occurrence of Pancreatic Fistula in Patients who Underwent Laparoscopic Pancreaticoduodenectomy: a Retrospective Study.

The occurrence of postoperative pancreatic fistula following laparoscopic pancreaticoduodenectomy (LPD) is a significant concern, yet there is currently a lack of consensus on reliable predictive methods for this complication. Therefore, the aim of this study was to assess the clinical significance of C-reactive protein (CRP) and procalcitonin (PCT) values and their reliability in early predicting the development of clinically relevant pancreatic fistula (CRPF) following LPD.A retrospective analysis was conducted using data from 120 patients who had LPD between September 2019 and December 2021. Preoperative assessment data, standard patients' demographic and clinicopathological characteristics, intra- and postoperative evaluation, as well as postoperative laboratory values on postoperative days (PODs) 1, 3, and 7, including white blood cells (WBCs), CRP, and PCT, were prospectively recorded on a dedicated database. Two clinicians separately collected and cross-checked all of the data.Among 120 patients [77 men (64%), 43 women (36%], CRPF occurred in 15 patients (11 grade B and 4 grade C fistulas). The incidence rate of CRPF was 12.3%. A comparison of the median values of WBCs, PCT, and CRP across the two groups revealed that the CRPF group had higher values on most PODs than the non-CRPF group. Receiver operating characteristic (ROC) analysis was used to calculate the area under the curve (AUC) and cutoff values. It was discovered that POD 3 has the most accurate and significant values for WBCs, CRP, and PCT. According to the ROC plots, the AUC for WBCs was 0.842, whereas the AUC for PCT was 0.909. As for CRP, the AUC was 0.941 (95% CI 0.899-0.983, p<0.01) with a cutoff value of 203.45, indicating a sensitivity of 93.3% and specificity of 91.4%.Both CRP and PCT can be used to predict the early onset of CRPF following LPD, with CRP being slightly superior on POD 3.

Prevalence of Malnutrition and the Value of Predicting Pancreatic Fistula in Patients with Laparoscopic Pancreatoduodenectomy.

Background: Pancreatoduodenectomy is a standard surgical procedure for periampullary tumors. With recent improvements in perioperative management, postoperative mortality has decreased significantly in recent years; however, postoperative pancreatic fistula (POPF) is still one of the most prevalent and dangerous complications. The purpose of this study was to analyze the prevalence of malnutrition and the value of predicting POPF in patients with laparoscopic pancreatoduodenectomy (LPD). Methods: We retrospectively analyzed the perioperative data of 747 patients undergoing LPD in the Department of Hepatobiliary and Pancreatic Surgery, The First Hospital of Jilin University, China. Simultaneously, we analyzed the prevalence rate of malnutrition with three different nutritional assessment scores and explored the independent risk variables for POPF to identify potential predictive value. Results: Malnutrition was observed in 20.1% of patients with the prognostic nutritional index (PNI), 85.0% of patients with the controlling nutritional status (CONUT) score, and 73.1% of patients with the NRI score. Univariate and multivariate analyses all showed that the risk factors for POPF were pancreatic texture, pancreatic duct diameter, abdominal infection, body mass index (BMI), nomogram-revised risk index (NRI), and PNI. The receiver operating characteristic curve indicated that the BMI/PNI ratio was capable of predicting the occurrence of clinical POPF following LPD, with an area under the curve of 0.708. Conclusions: Compared with no malnourished patients, malnutrition is associated with a higher risk of POPF among patients with LPD. In addition, the BMI/PNI ratio has some predictive value in the development of POPF following LPD.

Postoperative Day 1 Drain Amylase After Pancreatoduodenectomy: Optimal Level to Predict Pancreatic Fistula

IntroductionDrain amylase on day 1 (DA-D1) after pancreaticoduodendectomy (PD) to predict occurrence of postoperative pancreatic fistula (POPF) is controversial. In this study, we evaluate the optimal DA-D1 level to predict clinically relevant POPF (CR-POPF). MethodsThe 2014–2020 NSQIP pancreatectomy-targeted database was queried for patients who underwent elective PD. Perioperative data was extracted to determine development of POPF and CR-POPF per International Study Group of Pancreatic Fistula guidelines. Receiver operative curve (ROC) and Youden’s index were used to assess the performance and optimal cutoff for DA-D1 to predict CR-POPF. The DA-D1 value was confirmed with a multivariable logistic regression to determine hazard ratios (HR) for CR-POPF and conditional logistic regression by modified fistula risk score (mFRS) subgroups. ResultsA total of 6,087 patients with complete perioperative data were included. Mean DA-D1 was 2,897 ± 8,636 U/L; median drain duration was 5 days. CR-POPF was documented in 544 (8.9%) patients. DA-D1 ROC for CR-POPF had area under the curve of 0.779 (95%CI 0.759–0.798). Youden’s index for the CR-POPF ROC coordinates had 77.6% sensitivity and 66.3% specificity, corresponding to DA-D1 values ≥ 720U/L as an optimal cutoff. CR-POPF was higher for patients with DA-D1 ≥ 720U/L (HR 4.6; p = 0.001). Patients DA-D1 < 720U/L with a negligible, low, intermediate, and high mFRS had respectively 1%, 3%, 4%, and 7% rate of CR-POPF. ConclusionDA-D1 < 720U/L after elective PD is a clinically useful predictor of CR-POPF. For patients with negligible to intermediate FRS, surgeons should consider utilizing DA-D1 < 720 U/L for removal of a drain on the first postoperative day.

Computed Tomography Imaging Evaluation of Pancreatic Density and Muscular Mass as Predictive Risk Factors for Pancreatic Fistula Formation after Duodenocephalopancreasectomy

The aim of this study was to investigate the predictive role of preoperative pancreatic density and muscular mass, assessed via CT imaging, in patients undergoing duodenocephalopancreasectomy, specifically in relation to the occurrence of postoperative pancreatic fistula (POPF). A retrospective analysis was conducted on a cohort of 57 consecutive patients who had been diagnosed with cephalo-pancreatic disease and had undergone duodenocephalopancreasectomy in the last five years. The most prevalent pathologies observed were ductal adenocarcinoma (29.2%), biliary adenocarcinoma (12.9%), and duodenal and papillary adenocarcinoma (13.9%). We collected information about age, sex, histopathological findings, type of surgery, presence or absence of pancreatic fistula, pancreatic density on preoperative CT images, and muscular area, calculated at the level of the L3 vertebra using “3D Slicer” software. Our data show that 28% of patients developed a pancreatic fistula, with an average attenuation of pancreatic density of 27 HU, which was lower than that observed in the non-fistula group (33.31 HU). However, statistical analysis did not reveal a significant association between low pancreatic density and fistula development. Therefore, our findings do not establish a significant association between pancreatic fistula and pancreatic density, aligning with the existing literature on the subject.

A new fistula risk score using sarcopenic obesity and subcutaneous fat area for predicting postoperative pancreatic fistula after pancreaticoduodenectomy.

Postoperative pancreatic fistula (POPF) is a serious complication of pancreaticoduodenectomy and current predictors of POPF are inadequate. We developed a new fistula score to more accurately predict POPF. We retrospectively reviewed 169 patients who underwent pancreaticoduodenectomy between January 2010 and August 2021 at our institution and examined patients' risk factors according to the occurrence of grade B/C POPF. Muscle and fat were assessed on preoperative computed tomography images and cutoff values were determined by receiver operating characteristic curve analysis. Grade B/C POPF occurred in 38 (22.5%) patients. Multivariate analysis of patients' risk factors revealed that sarcopenic obesity (odds ratio [OR] 2.94; p=.033), L3 subcutaneous fat area (SFA) ≥ 98.0cm2 (OR 2.69; p=.049), and soft pancreatic texture (OR 27.5; p=.002) were independent risk factors of grade B/C POPF occurrence. In addition, a new fistula risk score based on these factors revealed that 63.6% of patients with high scores developed grade B/C POPF, while those with negligible or low scores did not. A new fistula risk scoring system based on sarcopenic obesity, SFA, and pancreatic texture may accurately predict POFP.

An advanced bipolar device helps reduce the rate of postoperative pancreatic fistula in laparoscopic gastrectomy for gastric cancer patients: a propensity score-matched analysis

BackgroundAdvanced bipolar devices (ABD; e.g., LigaSure™) have a lower blade temperature than ultrasonically activated devices (USAD; e.g., Harmonic® and Sonicision™) during activation, potentially enabling accurate lymph node dissection with less risk of postoperative pancreatic fistula (POPF) due to pancreatic thermal injury in laparoscopic gastrectomy. Therefore, we compared the efficacy and safety of ABD and USAD in laparoscopic gastrectomy for gastric cancer patients.MethodsA retrospective cohort study was conducted on patients who underwent laparoscopic distal gastrectomy (LDG) between August 2008 and September 2020. A total of 371 patients were enrolled, and short-term surgical outcomes, including the incidence of ISGPF grades B and C POPF, were compared between ABD and USAD. The risk factors for POPF in LDG were investigated by univariate and multivariate analyses.ResultsA propensity score-matching algorithm was used to select 120 patients for each group. The POPF rate was significantly lower (0.8 vs. 9.2%, p < 0.001), the morbidity rate was lower (13.3 vs. 28.3%, p < 0.001), the length of postoperative hospitalization was shorter (14 vs. 19 days, p < 0.001), and the lymph node retrieval rate was higher (34 vs. 26, p < 0.001) with an ABD than with a USAD. There were no mortalities in either group. A multivariate analysis showed that a USAD was the only independent risk factor with a considerably high odds ratio for the occurrence of POPF (USAD/ABD, odds ratio 8.38, p = 0.0466).ConclusionAn ABD may improve the safety of laparoscopic gastrectomy for gastric cancer patients.

Short and long-term outcomes of minimally invasive central pancreatectomy: Comparison with minimally invasive spleen-preserving subtotal distal pancreatectomy

BackgroundCentral pancreatectomy(CP) is more complex surgery and higher complication rate than distal pancreatectomy(DP). However, with the development of minimally invasive surgery, CP has become a safer surgery technique. In this study, we compare minimally invasive CP(MI-CP) and Minimally invasive spleen-preserving subtotal DP(MI-SpSTDP) to figure out the short-term and long-term outcomes of MI-CP. MethodsFrom March 2007 to June 2020, 36 cases of MI-SpSTDP and 23 cases of MI-CP were performed for benign and borderline malignant pancreatic tumors in Severance hospital. The occurrence of postoperative pancreatic fistula(POPF) and Clavian-Dindo classification grade 3 or more in the two group was investigated, and the Controlling nutritional status scores(CONUT score) before and 1-year after surgery were compared to determine the long-term outcomes of exocrine function. ResultsThere was no difference in postoperative complications including POPF between the two groups(17.4% vs 5.1%, p = 0.294). And there were no statistical differences in either the MI-CP group (0.74 ± 0.75 vs. 0.78 ± 0.99, p = 0.803) or the MI-SpSTDP group (0.86 ± 0.83 to 0.61 ± 0.59, p = 0.071). ConclusionsMI-CP had longer operation time and hospital stay and is safe and effective in preserving endocrine and exocrine functions in treatment of benign or borderline tumors located at the neck or proximal body of the pancreas.

Impact of pancreatic fat infiltration on postoperative pancreatic fistula occurrence in patients undergoing invagination pancreaticojejunostomy

BackgroundNo studies to date have determined the impact of pancreatic fat infiltration on postoperative pancreatic fistula (POPF) occurrence in patients undergoing invagination pancreaticojejunostomy (IV-PJ). MethodsThe medical records of patients with a soft pancreas who underwent pancreatoduodenectomy followed by IV-PJ were reviewed . The pancreatic fat ratio on computed tomography (CT) images (I-PFR) was determined using preoperative CT and verified by histologic examination. The relationship between the I-PFR and POPF occurrence was determined. Patients were classified into 2 groups based on I-PFR value (fatty and non-fatty pancreas). Postoperative outcomes were compared between the two groups, and specifically among patients who developed POPF. ResultsOf 221 patients, POPF occurred in 67 (30.3%). I-PFR was positively correlated with histologic-calculated fat ratio (ρ = 0.517, p < 0.001). This index was shown to be an independent predictor of POPF. Based on an I-PFR cut-off value of 3.2%, 92 patients were classified in the fatty pancreas group. Subgroup analysis of the patients who developed POPF showed that incidence of abscess formation and hemorrhage tended to be higher in patients with fatty pancreas than in those with non-fatty pancreas. ConclusionsPancreatic fat infiltration is highly associated with POPF and possibly causes subsequent serious complications in patients undergoing IV-PJ.

Postoperative Serum Hyperamylasemia Adds Sequential Value to the Fistula Risk Score in Predicting Pancreatic Fistula after Pancreatoduodenectomy.

To evaluate whether postoperative serum hyperamylasemia (POH), with drain fluid amylase (DFA) and C-reactive protein (CRP), improves the Fistula Risk Score (FRS) accuracy in assessing the risk of a postoperative pancreatic fistula (POPF). The FRS predicts POPF occurrence using intraoperative predictors with good accuracy but intrinsic limits. Outcomes of patients who underwent pancreaticoduodenectomies between 2016 and 2021 were evaluated across FRS-risk zones and POH occurrence. POH consists of serum amylase activity greater than the upper limit of normal (52 U/l), persisting within the first 48 hours postoperatively (postoperative day -POD- 1 and 2). Out of 905 pancreaticoduodenectomies, some FRS elements, namely soft pancreatic texture (odds ratio (OR) 11.6), pancreatic duct diameter (OR 0.80), high-risk pathologic diagnosis (OR 1.54), but not higher blood loss (OR 0.99), were associated with POH. POH was an independent predictor of POPF, which occurred in 46.8% of POH cases ( P <0.001). Once POH occurs, POPF incidence rises from 3.8% to 42.9%, 22.9% to 41.7%, and 48.9% to 59.2% in patients intraoperatively classified at low, moderate and high FRS risk, respectively. The predictive ability of multivariable models adding POD 1 drain fluid amylase, POD 1-2 POH and POD 3 C-reactive protein to the FRS showed progressively and significantly higher accuracy (AUC FRS=0.82, AUC FRS-DFA=0.85, AUC FRS-DFA-POH=0.87, AUC FRS-DFA-POH-CRP=0.90, DeLong always P <0.05). POPF risk assessment should follow a dynamic process. The stepwise retrieval of early, postoperative biological markers improves clinical risk stratification by increasing the granularity of POPF risk estimates and affords a possible therapeutic window before the actual morbidity of POPF occurs.

Postpancreatectomy Acute Pancreatitis After Pancreaticoduodenectomy: A Distinct Clinical Entity.

This study aimed to characterize postpancreatectomy acute pancreatitis (PPAP) after pancreaticoduodenectomy (PD) in a high-volume center. The International Study Group for Pancreatic Surgery (ISGPS) has recently proposed a new definition and grading scale of PPAP, but specific studies are lacking. Patients who underwent PD from 2020 to 2021 were retrospectively reviewed. PPAP was defined based on the International Study Group for Pancreatic Surgery definition: sustained elevation of serum amylase levels for least the first 48 hours postoperatively and radiologic alterations consistent with PPAP. Among a total of 716 patients who were finally analyzed, PPAP occurred in 152 (21.2%) patients. Patients with PPAP were associated with significantly higher incidences of postoperative pancreatic fistula (POPF) (40.8% vs 11.7%, P <0.001), major complications (13.8% vs 6.6%, P =0.004), and biliary leak (11.8% vs 4.6%, P =0.001). Among them, 8 patients developed grade C PPAP leading to organ failure, reoperation, or death. Patients developing PPAP alone also demonstrated a statistically significantly increased rate of major complications than those without PPAP or POPF. In contrast, no differences were found in postoperative outcomes in patients with POPF in terms of whether they were associated with PPAP. PPAP is a distinct complication after PD with distinctive clinical outcomes. A part of PPAP presents as an inflammatory process in the early postoperative period but sometimes could lead to necrotizing pancreatitis or other severe clinical scenarios, and another part of PPAP would lead to anastomotic failure that accounts for a great proportion of POPF occurrence.