Anastomotic longitudinal stress due to modification of arterial longitudinal properties after anastomosis

• Published in: Swiss surgery Vol. 6; no. 2; p. 74
• Main Authors: Tozzi, P, Hayoz, D, Mueller, X M, M'Baku, C, Mallabiabarrena, I, von Segesser, L K
• Format: Journal Article
• Language: English
• Published: Switzerland 2000
• Subjects: Anastomosis, Surgical - methods; Animals; Blood Pressure - physiology; Carotid Arteries - physiopathology; Carotid Arteries - surgery; Compliance; Muscle, Smooth, Vascular - physiopathology; Muscle, Smooth, Vascular - surgery; Postoperative Complications - physiopathology; Pulsatile Flow - physiology; Swine
• ISSN: 1023-9332
• DOI: 10.1024/1023-9332.6.2.74

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. 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. 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). 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.