Abstract:
BACKGROUND:Coughing, bending, and lifting raise the pressure inside the abdomen, repetitively increasing stresses on the abdominal wall and the associated scaffold. The purpose of this study was to evaluate the effect of repetitive loading on biological scaffolds. It was hypothesized that exposure to repetitive loading would result in decreased tensile strength and that crosslinked scaffolds would resist these effects more effectively than non-crosslinked scaffolds. STUDY DESIGN:Nine materials were evaluated (porcine dermis: Permacol, CollaMend, Strattice, XenMatrix; human dermis: AlloMax, FlexHD; bovine pericardium: Veritas, PeriGuard; and porcine small intestine submucosa: Surgisis; in addition, Permacol, CollaMend, and PeriGuard are crosslinked). Ten specimens were hydrated and subjected to uniaxial tension to establish baseline properties. Thirty specimens were hydrated and subjected to 10, 100, or 1,000 loading cycles (n = 10 each). RESULTS:Tensile strength remained unchanged for CollaMend, XenMatrix, Veritas, and Surgisis during all cycles (p > 0.05). However, Strattice and AlloMax exhibited reduced tensile strength, and Permacol, FlexHD, and PeriGuard exhibited a slight increase in tensile strength with increasing number of cycles. Crosslinked bovine pericardium (PeriGuard) displayed greater tensile strength than non-crosslinked bovine pericardium (Veritas) and crosslinked porcine dermis (Permacol) exhibited greater tensile strength than non-crosslinked porcine dermis (Strattice, XenMatrix) during all cycles (p < 0.0001). CONCLUSIONS:Materials that rapidly lose strength after repetitive loading might not be appropriate in clinical scenarios involving elevated stresses, such as in patients with high body mass index or when replacing large areas of the abdominal wall without tissue reinforcement, although scaffolds that maintain initial tensile strength can be particularly advantageous.
journal_name
J Am Coll Surgjournal_title
Journal of the American College of Surgeonsauthors
Pui CL,Tang ME,Annor AH,Ebersole GC,Frisella MM,Matthews BD,Deeken CRdoi
10.1016/j.jamcollsurg.2012.03.006subject
Has Abstractpub_date
2012-08-01 00:00:00pages
216-28issue
2eissn
1072-7515issn
1879-1190pii
S1072-7515(12)00216-5journal_volume
215pub_type
杂志文章abstract:BACKGROUND:Split liver transplantation is an excellent option for expansion of the donor organ pool. However, reports of increased morbidity in split liver recipients may limit use of this technique. STUDY DESIGN:This was a single center retrospective analysis investigating split liver transplantation. Between August ...
journal_title:Journal of the American College of Surgeons
pub_type: 杂志文章
doi:10.1016/j.jamcollsurg.2013.03.003
更新日期:2013-07-01 00:00:00
abstract:BACKGROUND:Cirrhosis as an independent predictor of poor outcomes in trauma patients was identified in 1990. We hypothesized that the degree of preinjury hepatic dysfunction is, by itself, an independent predictor of mortality. STUDY DESIGN:The trauma registry at our Level I trauma center was queried for all ICD-9 cod...
journal_title:Journal of the American College of Surgeons
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journal_title:Journal of the American College of Surgeons
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journal_title:Journal of the American College of Surgeons
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journal_title:Journal of the American College of Surgeons
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journal_title:Journal of the American College of Surgeons
pub_type: 杂志文章,随机对照试验
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journal_title:Journal of the American College of Surgeons
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:Journal of the American College of Surgeons
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journal_title:Journal of the American College of Surgeons
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journal_title:Journal of the American College of Surgeons
pub_type: 杂志文章
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