title: The Relationship between Tension and Length of the Aortic Adventitia Resected from the Aortic Wall of Acute Aortic Dissection.
abstract: OBJECTIVE
  To our knowledge, no previous study has described the measurement of the tensile strength of the human aortic adventitia. In the present study, we examined the relationship between the tension and length of the aortic adventitia resected from the aortic wall of patients with acute aortic dissection.
  
  
  METHODS
  We obtained rectangular specimens from the aortic adventitia that was resected in patients with acute aortic dissection during surgery. The specimens were placed on a tension meter (Digital Force Gauge FGS-10, SHIMPO, Kyoto, Japan) within 15 min after resection and stretched until they were pulled apart, and the tension and length were recorded.
  
  
  RESULTS
  We obtained 18 specimens during surgery from 11 cases of acute aortic dissection. When the specimen was being pulled apart, the mean tension recorded was 10.2 ± 4.9 N/cm specimen width, whereas the mean elongated length recorded was 4.2 ± 1.1 mm/cm specimen length.
  
  
  CONCLUSIONS
  We determined that the aortic adventitia is elastic and expandable up to 140% of its original length. This indicates that dilation of the aorta to >4.2 cm in diameter may result in a rupture if the original aortic diameter prior to dissection was 3 cm. (English translation of J Jpn Coll Angiol 2013; 53: 77-81).
authors.affiliation: Department of Cardiovascular Surgery, Shizuoka General Hospital, Shizuoka, Shizuoka, Japan.
authors.forename: Takehide
authors.initials: T
authors.lastname: Akimoto
authors.affiliation: Department of Cardiovascular Surgery, Shizuoka General Hospital, Shizuoka, Shizuoka, Japan.
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Kitano
authors.affiliation: Department of Cardiovascular Surgery, Shizuoka General Hospital, Shizuoka, Shizuoka, Japan.
authors.forename: Hiroo
authors.initials: H
authors.lastname: Teranishi
authors.affiliation: Department of Cardiovascular Surgery, Shizuoka General Hospital, Shizuoka, Shizuoka, Japan.
authors.forename: Masahumi
authors.initials: M
authors.lastname: Kudo
authors.affiliation: Department of Cardiovascular Surgery, Shizuoka General Hospital, Shizuoka, Shizuoka, Japan.
authors.forename: Makoto
authors.initials: M
authors.lastname: Matsuura
keywords: acute aortic dissection; aortic adventitia; aortic wall tension; relationship between tension and length