Document Detail


A novel biodegradable pancreatic stent for human pancreatic applications: a preclinical safety study in a large animal model.
MedLine Citation:
PMID:  18291398     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Endoscopic stenting is one treatment method for pancreatic strictures or pseudocysts in patients with symptomatic chronic pancreatitis. With a biodegradable stent, the later removal of the stent could be avoided.
OBJECTIVE: We investigated the degradation, patency, and toxicity of a novel biodegradable, self-expanding radiopaque polylactide-barium sulfate pancreatic stent in a large animal model.
DESIGN: Animal study.
SETTING AND INTERVENTIONS: Five swine had a biodegradable pancreatic stent placed into the pancreatic duct (PD) and were followed-up for 6 months.
MAIN OUTCOME MEASUREMENTS: Repeated blood tests and radiographs were studied during the follow-up. The animals were euthanized at 6 months, at which time, the PD inner diameter was measured, and histology was analyzed and graded. For comparison, histology from 5 nonstented animals was also analyzed.
RESULTS: The stent was correctly inserted into the PD in 4 of 5 animals. All the animals remained healthy, gained weight, and showed no signs of pancreatitis. A radiograph showed that the stent was in its original place in all animals at 1 month but had disappeared in all animals by 3 months. At 6 months, the autopsied pancreatic tissue was soft, and the PD was patent in all of the animals. The PD was slightly dilated at the site of the stent in the head of the pancreas compared with the preoperative diameter (5 mm [range 3-6 mm] vs 2 mm [range 1-3 mm], P < .05), but, in the body of the pancreas, no significant dilatation was seen. In the histology of the pancreata, there was no difference between the samples from the exposed parts of the biodegradable pancreatic stent compared with the distal nonexposed parts, or to the samples from the nonstented animals.
CONCLUSIONS: This novel biodegradable pancreatic stent, studied in these swine, appeared to be safe for use in the PD. These encouraging results warrant further clinical trials with this biodegradable pancreatic stent in pancreatic applications in human beings.
Authors:
Johanna Laukkarinen; Teemu Lämsä; Isto Nordback; Joonas Mikkonen; Juhani Sand
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-03-04
Journal Detail:
Title:  Gastrointestinal endoscopy     Volume:  67     ISSN:  1097-6779     ISO Abbreviation:  Gastrointest. Endosc.     Publication Date:  2008 Jun 
Date Detail:
Created Date:  2008-06-02     Completed Date:  2008-08-25     Revised Date:  2012-09-10    
Medline Journal Info:
Nlm Unique ID:  0010505     Medline TA:  Gastrointest Endosc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1106-12     Citation Subset:  IM    
Affiliation:
Department of Gastroenterology and Alimentary Tract Surgery, Tampere University Hospital, Tampere, Finland.
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MeSH Terms
Descriptor/Qualifier:
Absorbable Implants*
Animals
Biopsy, Needle
Cholangiopancreatography, Endoscopic Retrograde / methods*
Constriction, Pathologic / surgery
Disease Models, Animal
Follow-Up Studies
Humans
Immunohistochemistry
Pancreatic Diseases / pathology,  surgery
Pancreatic Ducts / surgery*
Prosthesis Design
Risk Assessment
Sensitivity and Specificity
Stents*
Swine
Comments/Corrections
Comment In:
Gastrointest Endosc. 2008 Jun;67(7):1113-6   [PMID:  18513553 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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