Biomechanical properties of glutaraldehyde treated human pericardium

Valts Ozolins, I. Ozolanta, L. Smits, A. Lacis, V. Kasyanov

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Autologous pericardium, for repair of congenital heart defects, can be used in its fresh non-treated state, or after chemical fixation with glutaraldehyde solution as a biomaterial for surgical repair of congenital heart anomalies. The aim of this experimental study is to investigate changes of biomechanical properties and resistance to proteolytic degradation of human pericardium, after harvesting with glutaraldehyde solution. After taken out of a pericardium from anterior part of pericardial sac at the time of operation it was fixed with 0.2% solution of glutaraldehyde for 6 minutes. Some glutaraldehyde treated and untreated samples were incubated in collagenase solution (100 Uml-1) for 2 hours at 37°C and proteolytic effect was estimated with gravimetric method. For investigation of biomechanical properties uniaxial tensile tests were performed with testing machine Zwick-Roell Z010. There were set up 18 pieces of fresh human pericardium and 11 pieces of glutaraldehyde-treated human pericardium. There is difference (p<0.05) of ultimate strain (εmax) between fresh pericardium εmax=0. 119±0.037 and glutaraldehyde treated human pericardium εmax= 0.098±0.015, respectively. There is difference (p<0.05) of ultimate stress (σmax) between non-treated pericardium σmax=3.14±0.70 MPa and glutaraldehyde treated human pericardium σmax=6.20±1.47 MPa. There is difference (p<0.05) of tangential modulus of elasticity (E) between non-treated and glutaraldehyde treated human pericardium: 98.67±20.75 MPa and 50.25±16.04 MPa, respectively. Gravimetric data demonstrated that glutaraldehyde treatment resulted in statistically significant improvement in resistance of human pericardium to proteolytic degradation. Material became stiffer and stronger after treatment with glutaraldehyde solution as well as more resistant to proteolytic degradation then non-treated one. These biomechanical differences could be explained by formation of collagen crosslink after glutaraldehyde treatment. We conclude that treating with glutaraldehyde improve the application of autologous human pericardium as the plastic material for surgical repair of congenital heart anomalies by improving its biomechanical properties and increasing resistance to proteolytic degradation.

Original languageEnglish
Title of host publication14th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics, NBC 2008
PublisherSpringer Verlag
Pages143-145
Number of pages3
ISBN (Print)9783540693666
DOIs
Publication statusPublished - 2008
Event14th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics - Riga, Latvia
Duration: 16 Jun 200820 Jun 2008
Conference number: 14

Publication series

NameIFMBE Proceedings
Volume20 IFMBE
ISSN (Print)1680-0737

Conference

Conference14th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics
Abbreviated titleNBC 2008
Country/TerritoryLatvia
CityRiga
Period16/06/0820/06/08

Keywords

  • Autologous pericardium
  • biomechanical properties
  • congenital heart defect
  • glutaraldehyde
  • proteolytic degradation

Field of Science

  • 2.6 Medical engineering
  • 3.4 Medical biotechnology

Publication Type

  • 3.1. Articles or chapters in proceedings/scientific books indexed in Web of Science and/or Scopus database

Fingerprint

Dive into the research topics of 'Biomechanical properties of glutaraldehyde treated human pericardium'. Together they form a unique fingerprint.

Cite this