title: Anastomotic longitudinal stress due to modification of arterial longitudinal properties after anastomosis.
abstract: BACKGROUND
  In our hands, in vivo segmental vessel length changes up to 5% because of blood pressure: increasing in arterial pressure is associated to decrease in segmental vessel length.
  
  
  METHODS
  Using two piezoelectric crystals sutured on vessel wall and a high fidelity pressure probe, we recorded artery length variations as function of blood pressure, before and after an end-to-end anastomosis on four pigs carotid arteries.
  
  
  RESULTS
  Mean arterial pressure before anastomosis = 73 mmHg (+/- 12); mean arterial pressure after anastomosis = 91 mmHg (+/- 14); mean crystals displacement before anastomosis during systole = -0.21 mm; mean crystals displacement after anastomosis during systole = +0.24 mm; mean distance between crystals before anastomosis = 12.3 mm (+/- 0.8) and after anastomosis = 11.2 mm (+/- 0.5).
  
  
  CONCLUSIONS
  In the acute phase following an end-to-end anastomosis, an increase in blood pressure causes increasing in vessel length, with an exponential correlation. The anastomosis is constantly subjected to a longitudinal traction whose magnitude depends on blood pressure.
authors.affiliation: Clinic of Cardiovascular Surgery, Lausanne University Hospital.
authors.forename: P
authors.initials: P
authors.lastname: Tozzi
authors.forename: D
authors.initials: D
authors.lastname: Hayoz
authors.forename: X M
authors.initials: XM
authors.lastname: Mueller
authors.forename: C
authors.initials: C
authors.lastname: M'Baku
authors.forename: I
authors.initials: I
authors.lastname: Mallabiabarrena
authors.forename: L K
authors.initials: LK
authors.lastname: von Segesser
mesh_terms: D000714:Anastomosis, Surgical / Q000379:methods*; D000818:Animals; D001794:Blood Pressure / Q000502:physiology*; D002339:Carotid Arteries / Q000503:physiopathology / Q000601:surgery; D003187:Compliance; D009131:Muscle, Smooth, Vascular / Q000503:physiopathology / Q000601:surgery*; D011183:Postoperative Complications / Q000503:physiopathology*; D011673:Pulsatile Flow / Q000502:physiology; D013552:Swine