Soft coagulation, polyglycolic acid felt, and fibrin glue for prevention of pancreatic fistula after distal pancreatectomy

Arterial reinforcement following pancreatoduodenectomy: The solution to prevent delayed hemorrhage caused by postoperative pancreatic fistula

PURPOSE

Delayed hemorrhage (DH) is a rare and yet well-known fatal complication associated with postoperative pancreatic fistula (POPF) in pancreatoduodenectomy (PD). The study aimed to investigate whether arterial reinforcement (AR) using polyglycolic acid sheets (PAS) followed by fibrin sealant (FS) to the hepatic artery could prevent DH in the setting of POPF after PD.

METHODS

A total of 345 patients underwent PD for periampullary tumors from March 2011 to March 2022. From March 2011 to March 2018, 225 patients underwent PD, and AR was not performed (non-AR group). From April 2018 to March 2022, 120 patients underwent PD, and AR was performed (AR group). AR was achieved by wrapping the proper hepatic artery all the way down to the celiac artery with PAS followed by coating with FS. Demographic profile and various outcomes including DH of these two groups were compared and analyzed retrospectively.

RESULTS

In non-AR group, 48 (21.3%) and 12 (5.3%) patients had grade B and C POPF, respectively. In AR group, 26 (21.7%) and four (3.3%) patients had grade B and C POPF, respectively. The incidence of POPF was not statistically significant (p = .702) between the groups. Among the patients with grade B or C POPF, DH occurred in 14 (23.3%) patients in non-AR group and only one patient in AR group (p = .016). Of the 15 patients with DH, four (26.7%) patients died.

CONCLUSION

AR using PAS and FS is effective in preventing DH in the setting of POPF.

Efficacy of electrocoagulation hemostasis: a study on the optimal usage of the very-low-voltage mode

BACKGROUND

The very-low-voltage (VLV) mode in electrosurgery can stably and deeply energize tissues even if the local electrical resistance changes with energization. Therefore, in electrosurgical hemostasis, the VLV mode is more reliable than other coagulation modes. In clinical practice, the appropriate use of combined saline drip and blood suction under the VLV mode can further enhance coagulation ability. However, the detailed mechanism is not known. The current study aimed to evaluate the association between electrosurgical activation time (ET) and hemostatic tissue effect (HTE) under the VLV mode. Further, the effect of saline drip and suction on power consumption and HTE was validated.

METHODS

Twelve female pigs weighing 35 kg were included in the experiment. A liver hemorrhage model was established via an open abdominal procedure, and hemostasis in the hemorrhagic lesion was attempted using the VLV mode under different conditions (ET: 3, 6, 9, and 12 s, with/without saline drip and/or continuous suction). Electrical data (such as voltage, current, and resistance) during coagulation were extracted. Then, the vertical/horizontal extent of HTE was assessed, and the hemostasis outcome (successful or failed) was recorded.

RESULTS

The vertical/horizontal HTE, power consumption, and integrated current value were positively correlated with the ET. The coagulation depth deepened with saline drip (p < 0.01). However, it was not affected by continuous suction (p = 0.20). The HTE area increased with saline drip (p < 0.01) and decreased with suction (p < 0.01). The power consumption and integrated current increased with saline drip (p < 0.01) and decreased with suction (p < 0.01). The success rate of hemostasis decreased with saline drip alone (31of 48 trials [success rate = 64.5%] in the saline drip group and 44/48 trials (success rate = 91.7%) in the control group). However, it improved with continuous suction (46/48 trials [success rate = 95.8%]).

CONCLUSION

The electrosurgical activation time was positively correlated with hemostatic tissue effect. Saline drip increased heat transfer efficiency but decreased the success rate of hemostasis. Therefore, the use of continuous suction in addition to saline drip increased hemostatic efficiency.

Covering reinforced staples with polyethylene glycolic acid felt-covered fibrin sealant to prevent pancreatic fistula after distal pancreatomy: a retrospective comparative study

BACKGROUND

In accordance with previous reports on the utility of polyethylene glycolic acid (PGA) felt and fibrin glue for postoperative pancreatic fistula (POPF), we usually perform distal pancreatectomy (DP) with a PGA felt reinforcement stapler when dissecting the pancreas and cover the stump with PGA felt and fibrin glue (the PPF method). In this study, we retrospectively analyzed our DP cases to compare the risk factors for POPF and the postoperative course of patients receiving the PPF method of treatment versus that of those receiving conventional treatment.

METHODS

A total of 127 DP procedures performed in our department between January 2008 and June 2021 were retrospectively analysed.

RESULTS

In the PPF method, grade B/C POPF rate tended to decrease, and POPF rate showed a significant decrease. The duration of drainage and the length of postoperative hospitalisation were also significantly shorter with the PPF method. The risk of grade B/C POPF significantly decreased with the PPF method if the pancreas was thick (> 13.5 mm) or the patients were obese.

CONCLUSIONS

The PPF method is useful for POPF in DP and is particularly effective when a thick pancreas or obese patient is involved. Removing the drainage tube early in the PPF method may lead to early discharge.

Treatment of air leakage using the VIO soft coagulation system: a mouse pulmonary air leak model

PURPOSE

We aimed to compare the efficacy of the VIO soft coagulation system (VSCS) for the treatment of air leaks by sealing with fibrin glue, and also assess the histological alterations that occur after soft coagulation.

METHODS

A mouse pulmonary air leak model was designed. The pulmonary fistula was subsequently coagulated with the VSCS or sealed with fibrin glue with polyglycolic acid (PGA) sheets. The burst pressure at air leak recurrence was measured in each group, and the results were compared. We also evaluated the histological alterations in the mouse pulmonary air leak model after soft coagulation with the VSCS.

RESULTS

The burst pressure in the soft coagulation group (80 W/Effect 5) (median 42.8; range 35.4-53.8 cmH₂O) was similar to that in the fibrin glue group (median 41.5; range 34.6-43.9 cmH₂O) (p = 0.21). Histological examinations revealed that the visceral pleura remained torn, the structure of the pulmonary alveolus was maintained, and the coagulated fistula was covered with a fibrin membrane in the soft coagulation group.

CONCLUSIONS

The pressure resistance following soft coagulation was equivalent to that after sealing using fibrin glue with PGA sheets. The air leaks were likely controlled by covering the fistula with a fibrin membrane after soft coagulation with the VSCS.

Management of the pancreatic transection plane after left (distal) pancreatectomy: Expert consensus guidelines by the International Study Group of Pancreatic Surgery (ISGPS)

BACKGROUND

The aim was to evaluate the various operative techniques and outcomes used to manage the pancreatic transection plane (or stump) during a left (distal) pancreatectomy and to develop expert consensus guidelines.

METHODS

Evidence-based, clinically relevant questions were discussed and then were circulated among members of the International Study Group of Pancreatic Surgery. After agreement on the questions and statements, voting in a 9-point Likert scale was used to gauge the level of objective support for each.

RESULTS

Studies using the International Study Group of Pancreatic Surgery definition of postoperative pancreatic fistula including 16 randomized trials were reviewed to generate a series of statements set into 14 domains. There was strong consensus in the following statements: there was no difference in the postoperative pancreatic fistula rate after left pancreatectomy between the handsewn and stapler techniques; a stapling technique could not be used in all cases of left pancreatectomy; the use of an energy-based tissue sealant or a chemical sealant device or combinations of these did not impact the postoperative pancreatic fistula rate; there was no difference in the postoperative pancreatic fistula rate between the open, laparoscopic, or robotic approaches; and there are 1 or more clinically important, patient-related risk factors associated with the postoperative pancreatic fistula rate. There was weak or conditional agreement on the use of prophylactic somatostatin analogs, stents, stump closure, stump anastomosis, and the role of abdominal drains.

CONCLUSION

Areas of strong consensus suggests a change in clinical practice and priority setting. Eight domains with lower agreement will require novel approaches and large multicenter studies to determine future key areas of practice.

Use of Neoveil or TachoSil to prevent pancreatic fistula following pancreaticoduodenectomy: A retrospective study

The aim of this study was to evaluate the effectiveness of using Neoveil and TachoSil sponges at the pancreaticojejunostomy anastomosis site in reducing the rate and severity of postoperative pancreatic fistula (POPF).In this study, we retrospectively evaluated data that were prospectively collected on pancreaticoduodenectomy (PD) procedures. Patients were divided into 3 groups: no patch application, Neoveil patch application, and TachoSil patch application. Demographic and surgical data were analyzed.Around 165 patients with PD were enrolled in this study and were divided into 3 groups. In the standard group (n = 43), no patch was applied, while in the Neoveil and TachoSil groups (n = 84 and n = 38, respectively), the pancreaticojejunostomy anastomosis site was covered with Neoveil and TachoSil patches, respectively. POPF grade B or above occurred in 37.2% (16/43), 14.3% (12/84), and 18.8% (6/38) of patients in the standard, Neoveil and TachoSil groups, respectively, with a significant difference between patients with and without patch application (P = .004). On multivariate logistic analysis of predictive factors for POPF, male sex, patch application, and hospital day were found to be the significant independent predictors of POPF grade B or above.Significant independent predictors of POPF were male sex and patch application. This study demonstrated that the use of Neoveil or TachoSil patches may reduce the incidence of POPF after PD.

A Novel Non-Gas Endospray for Applying Fibrin Glue in Laparoscopic Surgery

Purpose: Fibrin glue and polyglycolic acid felt are used for tissue repair in various surgical procedures. However, using a spray device to apply fibrin sealant during laparoscopic surgery can increase the intraperitoneal pressure, which can cause complications such as air embolism. We developed a novel non-gas endospray for use in laparoscopic surgery. This study aimed to evaluate the sealing effect of this non-gas endospray in comparison with a conventional gas-spray device and to evaluate the safety of its application in the clinical setting. Materials and Methods: An ex vivo pressure test model was used to assess the sealing effect of the non-gas endospray (method 1) versus conventional gas-spray (method 2). A bottle was sealed with a rabbit skin sample that had been pierced nine times by a 19G needle. Each skin sample was sealed using either method 1 or method 2 (n = 10 for each method). The non-gas endospray was then used in two patients undergoing laparoscopic splenectomy with CO₂ pneumoperitoneum. Intra-abdominal pressure was measured throughout the surgery. Results: Bursting pressures were similar in method 1 (246.9 ± 123.2 mmHg) and method 2 (265.5 ± 93.6 mmHg; P = 0.7082). During laparoscopic splenectomy, the non-gas endospray was successfully used to apply fibrin glue without any increase in intra-abdominal pressure. Conclusions: The novel non-gas endospray produced a strong sealing effect similar to that of a conventional gas-spray device and has thus far proved feasible in the clinical setting.

Low-voltage coagulation, polyglycolic acid sheets, and fibrin glue to control air leaks in lung surgery

OBJECTIVE

We evaluated the efficacy of low-voltage coagulation (LVC) with polyglycolic acid (PGA) sheets (Neoveil, GUNZE Ltd., Japan) and fibrin glue to control intraoperative alveolar air leaks after lung surgery.

METHODS

We included 176 patients with non-small cell lung cancer who underwent thoracoscopic lobectomies. When alveolar air leak was confirmed after lung resection, we applied LVC system to the pleural defect followed by layers of PGA sheets and fibrin glue (n = 40). We then analyzed postoperative air leaks (rate of occurrence and duration time).

RESULTS

73% of patients (29/40 cases) experienced no postoperative air leaks. Although 11 patients experienced air leaks after surgery, there were no prolonged air leaks (>7 days) (resolution time, 3.5 ± 1.4 days; range, 2-6 days). Two patients required drainage for late-onset air leaks, but their conditions improved without further treatment. There were no further adverse events.

CONCLUSIONS

The use of LVC with PGA sheets and fibrin glue following pulmonary resection efficiently prevented both intraoperative air leaks and prolonged air leaks after lung surgery.

Pancreatic fistula after laparoscopic splenectomy in patients with hypersplenism due to liver cirrhosis: effect of fibrin glue and polyglycolic acid felt on prophylaxis of postoperative complications

BACKGROUND

This study aimed to determine the effect of fibrin glue and polyglycolic acid (PGA) felt on prevention of pancreatic fistula (PF) after laparoscopic splenectomy in patients with hypersplenism due to liver cirrhosis.

METHODS

Fifty consecutive patients were enrolled in this prospective study. Twenty-three patients underwent laparoscopic splenectomy with a fibrin sheet (fibrin sheet group). The sealing ability of each treatment was evaluated by an ex vivo pressure test model. Based on the results from ex vivo experiments, 27 patients received prophylaxis using fibrin glue and PGA felt (PGA with fibrin group). The primary endpoint was the incidence of PF.

RESULTS

Significantly more (5, 22%) patients developed PF in the fibrin sheet group than in the PGA with fibrin group (0%, P = .037).

CONCLUSIONS

Our new application of fibrin glue and PGA felt is an effective prophylactic procedure for preventing development of PF after laparoscopic splenectomy.

Technical Aspects of Laparoscopic Distal Pancreatectomy for Benign and Malignant Disease: Review of the Literature

Distal pancreatectomy is the standard curative treatment for symptomatic benign, premalignant, and malignant disease of the pancreatic body and tail. The most obvious benefits of a laparoscopic approach to distal pancreatectomy include earlier recovery and shorter hospital stay. Spleen-preserving distal pancreatectomy should be attempted in case of benign disease. Spleen preservation can be achieved preferably by preserving the splenic vessels (Kimura technique), but also by resecting the splenic vessels and maintaining vascularity through the short gastric vessels and left gastroepiploic artery (Warshaw technique). Several studies have suggested a higher rate of spleen preservation with laparoscopy. The radical antegrade modular pancreatosplenectomy has become mainstay for treating pancreatic cancer and can be performed laparoscopically as well. Evidence on the feasibility and safety of laparoscopic distal pancreatectomy for cancer is scarce. Despite the obvious advantages of laparoscopic surgery, postoperative morbidity remains relatively high, mainly because of the high incidence of pancreatic fistula. For decades, surgeons have tried to prevent these fistulas but to date no strategy has been confirmed to be effective in 2 consecutive randomized studies. Pragmatic multicenter studies focusing on technical aspects of laparoscopic distal pancreatectomy are lacking and should be encouraged.

Use of a Fibrinogen/Thrombin-Based Collagen Fleece (TachoComb, TachoSil) With a Stapled Closure to Prevent Pancreatic Fistula Formation Following Distal Pancreatectomy

Background/Purpose. Postoperative pancreatic fistula formation remains a source of significant morbidity following distal pancreatectomy. The aim of this study was to evaluate the rate of clinically significant fistulas (International Study Group on Pancreatic Fistula grade B and grade C) after distal pancreatectomy using a fibrinogen/thrombin-based collagen fleece (TachoComb, TachoSil) with a stapled closure. Methods. Seventy-five patients underwent distal pancreatectomy at our institution between January 2005 and March 2014. A fibrinogen/thrombin-based collagen fleece was applied to the staple line of the pancreas before stapling. Results. Twenty-six patients (34.7%) developed a pancreatic fistula, 8 patients (10.7%) developed a grade B fistula, and no patients developed a grade C fistula. The duration of the drain was significantly different in patients with or without a pancreatic fistula (8.0 ± 4.5 vs 5.4 ± 1.3 days, P = .0003). Histological analysis showed that there was a tight covering with the fibrinogen/thrombin-based collagen fleece. Conclusion. The fibrinogen/thrombin-based collagen fleece (TachoComb, TachoSil) with a stapled closure has low rates of fistula formation and provides a safe alternative to the conventional stapled technique in distal pancreatectomy.

Decreasing pancreatic leak after distal pancreatectomy: bovine pericardium wrapping stump in a porcine model

BACKGROUND

Despite marked improvements in pancreatic surgery, the high incidence and morbidity of pancreatic leak after resection has remained unchanged. The current study investigated the safety and efficacy of bovine pericardium wrapping stump after distal pancreatectomy in a porcine model.

METHODS

Thirty-two swine were randomly assigned to control and experiment groups to undergo conventional scalpel transection with single hand-sewn closure of the pancreatic remnant (control) or bovine pericardium wrapping stump combined with hand-sewn closure (experiment). Closed-suction drainage was collected and measured daily. Animals were necropsied at 3 weeks postoperatively, and the pancreatic remnants were examined for histology. Primary end points were the development of a pancreatic fistula defined as greater than threefold drain/serum amylase after the 3rd postoperative day, and the presence of undrained amylase-rich fluid collections/abscess.

RESULTS

The incidence of pancreatic leak in the wrapping group was 6.3 versus 46.7% in the control group (p < 0.05). The amount of drainage fluid was higher in the control group than the experiment group during the postoperative days. There were no differences in operative time or other clinical parameters measured. No other significant differences were found in macroscopic changes between groups at reexploration. Histological examination demonstrated focal, chronic inflammation with necrosis in all animals.

CONCLUSIONS

Bovine pericardium wrapping stump effectively reduced the incidence of pancreatic leakage after the distal pancreatectomy.

Efficacy of an absorbable fibrin sealant patch (TachoSil) after distal pancreatectomy: a multicenter, randomized, controlled trial

OBJECTIVE

To evaluate the role of an absorbable fibrin sealant patch (TachoSil) in reducing postoperative pancreatic fistula (POPF) after distal pancreatectomy (DP).

BACKGROUND

POPF remains the main complication after DP.

METHODS

This was a prospective, open, randomized, study in which patients undergoing elective DP were randomized to standard surgical suturing or stapling with or without TachoSil. The primary end point was the incidence of POPF according to International Study Group on Pancreatic Fistula criteria. Amylase level in drainage fluid, number of days until removal of drain, and duration of hospital stay were secondary end points.

RESULTS

A total of 275 patients were enrolled at 19 centers over a 2-year period (TachoSil, n = 145; standard, n = 130). Twenty percent of procedures were laparoscopic and 21% were spleen-preserving resections. The incidence of POPF was not significantly different between groups (TachoSil, 62%; standard 68%; P = 0.267). Grade A fistula rate was similar in both groups (TachoSil 54%; standard 55%), whereas the grade B + C fistula rate was 8% with TachoSil versus 14% without (P = 0.139). Amylase drainage level on postoperative day 1 was significantly reduced with TachoSil (P = 0.025). Median number of days until drainage removal and length of hospital stay were similar in both groups (7 and 10 days, respectively).

CONCLUSIONS

The POPF rate was higher than expected when International Study Group on Pancreatic Fistula criteria were strictly applied, although the majority were biochemical fistulas. TachoSil had no significant effect on the rate of POPF, although there was a significant reduction of amylase level in drainage fluid on postoperative day 1.

Management of remnant pancreatic stump fto prevent the development of postoperative pancreatic fistulas after distal pancreatectomy: current evidence and our strategy

Distal pancreatectomy (DP) is the most common surgical procedure for treating benign and malignant lesions in the body or tail of the pancreas. Although the mortality rate related to DP has recently been reduced, the postoperative morbidity remains high. The most frequent and dismal complication occurring after DP is the development of postoperative pancreatic fistulas (POPF). Several resection methods and closure techniques for treating remnant pancreas have been developed in an effort to reduce the incidence of complications, especially POPF. However, the optimal procedure has not yet been established. In this review, we summarize the current clinical data and evidence for surgical techniques and perioperative management strategies for preventing POPF after DP. Finally, we introduce our non-closure technique for managing remnant pancreatic stumps.

Pancreatic thickness as a predictive factor for postoperative pancreatic fistula after distal pancreatectomy using an endopath stapler

PURPOSE

No consistent risk factor has yet been established for the development of pancreatic fistula (PF) after distal pancreatectomy (DP) with a stapler.

METHODS

A total of 31 consecutive patients underwent DP with an endopath stapler between June 2006 and December 2010 using a slow parenchymal flattening technique. The risk factors for PF after DP with an endopath stapler were identified based on univariate and multivariate analyses.

RESULTS

Clinical PF developed in 7 of 31 (22 %) patients who underwent DP with a stapler. The pancreata were significantly thicker at the transection line in patients with PF (19.4 ± 1.47 mm) in comparison to patients without PF (12.6 ± 0.79 mm; p = 0.0003). A 16-mm cut-off for pancreatic thickness was established based on the receiver operating characteristic (ROC) curve; the area under the ROC curve was 0.875 (p = 0.0215). Pancreatic thickness (p = 0.0006) and blood transfusion (p = 0.028) were associated with postoperative PF in a univariate analysis. Pancreatic thickness was the only significant independent factor (odds ratio 9.99; p = 0.036) according to a multivariate analysis with a specificity of 72 %, and a sensitivity of 85 %.

CONCLUSION

Pancreatic thickness is a significant independent risk factor for PF development after DP with an endopath stapler. The stapler technique is thus considered to be an appropriate modality in patients with a pancreatic thicknesses of <16 mm.