Anastomotic longitudinal stress due to modification of arterial longitudinal properties after anastomosis.
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.
Tozzi
P
P
Clinic of Cardiovascular Surgery, Lausanne University Hospital.
Hayoz
D
D
Mueller
X M
XM
M'Baku
C
C
Mallabiabarrena
I
I
von Segesser
L K
LK
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