Vascular reconstruction technique of a perforated portal vein during a pediatric total pancreatectomy and islet autotransplant

Portomesenteric and portosystemic venous reconstructions in children using balloon-expandable endoprostheses

BACKGROUND

Portomesenteric and portosystemic venous occlusive disease may lead to portomesenteric hypertension, variceal bleeding, ascites and hypersplenism. Data regarding endovascular reconstructive strategies in children, however, are limited.

OBJECTIVE

To report technical success, outcome and patency of portomesenteric and portosystemic venous reconstruction using VIABAHN VBX balloon-expandable endoprostheses in pediatric patients.

MATERIALS AND METHODS

Five pediatric patients (median age: 15 years, range: 4-18 years), including 3 (60%) boys and 2 (40%) girls, with portomesenteric or portosystemic venous occlusion or recurrent stenosis, underwent balloon-expandable stent graft reconstruction. Presenting symptoms included acute variceal bleeding, without (n = 2, 40%) or with (n = 1, 20%) splenomegaly, and transfusion-dependent chronic melena (n = 1, 20%). One patient was asymptomatic (n = 1, 20%). Preprocedural imaging included Doppler ultrasound and contrast-enhanced computed tomography (CT) in all patients. Initial imaging showed 4 (80%) occlusions and 1 (20%) recurrent stenosis greater than 50%. Technical aspects of the reconstructions, technical successes, clinical outcomes and adverse events were recorded. Technical success was defined as completion of stent graft reconstruction. Adverse events were categorized according to Society of Interventional Radiology criteria. Clinical success was defined as resolution of the presenting symptoms and/or prevention of portal hypertensive sequela.

RESULTS

Venous reconstruction was technically successful in all five patients. Stent graft locations included the main portal vein in 2 (40%), the superior mesenteric vein in 1 (20%), autologous Meso-Rex shunt in 1 (20%) and splenocaval shunt in 1 (20%). Six stent grafts were placed (two stent grafts placed in a single patient). Stent grafts had a median diameter of 7 mm (range: 6-10 mm) and a median length of 59 mm (range: 19-79 mm). Median fluoroscopy time was 36.6 min (range: 13.4-95.8 min) and median air kerma was 301.0 mGy (range: 218.0-1,148.2 mGy). No adverse events occurred. Median clinical follow-up was 18 months (range: 6-29 months). Median imaging follow-up was 17 months (range: 2-29 months). Clinical success was achieved in all patients and maintained during the follow-up period. One patient required follow-up intervention with superior mesenteric vein side extension with a self-expanding bare metal stent due to perigraft stenosis detected on CT 3 months after stent placement. There were no stent graft occlusions.

CONCLUSION

Portomesenteric and portosystemic venous reconstruction using balloon-expandable stent grafts in pediatric patients was feasible and clinically successful in this preliminary experience. Additional studies are warranted.

Laparoscopic-assisted versus open total pancreatectomy and islet autotransplantation: A case-matched study of pediatric patients

BACKGROUND

Total Pancreatectomy and Islet Autotransplantation (TPIAT) are a potential treatment for children with severe, refractory chronic pancreatitis. A laparoscopic-assisted approach provides a smaller incision and excellent visualization of the distal pancreas and spleen during resection. A minimally-invasive approach has proven advantageous for other pediatric procedures, but its value is unknown for this rare operation. This retrospective review compares outcomes between patients undergoing laparoscopic-assisted versus open TPIAT.

STUDY DESIGN

Children (n = 21) receiving laparoscopic-assisted TPIAT from 2013 to 2015 and children (n = 21) receiving open TPIAT from 2011 to 2015 were matched based on age, gender, symptom duration, previous interventions, and pancreatic fibrosis scores. Data reviewed included postoperative complications, operative time, estimated blood loss (EBL), intraoperative blood transfusions, number of islet equivalents (IEQ)/kg transplanted, hospital length-of-stay, graft function, narcotic use, and Patient Scar Assessment Questionnaire scores. Between-group differences were compared using Fisher's exact, Chi-square, and T-tests.

RESULTS

Surgical complications were similar between surgical groups (p = 0.35) and included wound complications (n = 11), chyle leak (n = 7), bowel obstruction (n = 5), bile leak (n = 3), gastrointestinal bleed (n = 2), and pneumonia (n = 1). There were no significant differences in operative time (p = 0.18), EBL (p = 0.96), blood transfusions (p = 0.34), IEQ/kg transplanted (p = 0.15), and hospital length-of-stay (p = 0.66). Insulin and opioid use was similar except for a slightly higher use of opioids (n = 4) at 2 years in the laparoscopic group. Patient surgical scar satisfaction was similar between groups (p = 0.26).

CONCLUSIONS

Outcomes for laparoscopic-assisted TPIAT appear comparable to open TPIAT. In children, a minimally-invasive approach does not compromise safety, effectiveness, or operative efficiency and may be used based on surgeon and patient preference.