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Swiss Surg. 2000;6(2):74-6.

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

Author information

1
Clinic of Cardiovascular Surgery, Lausanne University Hospital.

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 AND MATERIAL:

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.

PMID:
10786108
[Indexed for MEDLINE]

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