Biomechanical comparing of microvascular anastomoses prepared past diverse suturing techniques

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Highlights

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Biomechanical parameters of anastomoses are not well studied. But, these parameters can testify previously unknown backdrop of anastomoses.

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We found that the pressure level drib is not correlated with the run up count. I incorrectly placed stitch tin can dramatically increment the leakage.

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Nosotros showed that the tensile-forcefulness of the vessel is decreased by the anastomoses. For the given vessel diameter more than 8-sew should be used.

Abstract

Introduction

The biomechanical properties of minor vessels and microvascular anastomoses have non been studied completely all the same. Withal, in example of vascular injury and various microsurgical reconstructive procedures a safe anastomosis is essential. Quick and reliable tests are needed to exam diverse anastomoses in inquiry and in teaching courses also for quality control and proper feedback. We aimed to compare selected biomechanical properties of the simple interrupted, the continuous suture and the modified Lauritzen's sleeve-technique.

Materials and methods

Sixty femoral arteries from chicken thigh biopreparates and 12 intestinal aortas from rats were used in this study. In case of the pressure resistance test the groups were: the simple interrupted, the continuous suture and the modified Lauritzen's sleeve-technique. The tensile-strength, elongation and elasticity measurement groups were the simple interrupted and continuous sutures with eight and 12 stitches. Furthermore the suture materials in various conditions (uncomplicated thread, knotted threads, stitch with intact and damaged threads) were likewise compared. The tensile-strength and the force per unit area probe devices were custom made in cooperation with the Kinesthesia of Computer science.

Results

The average diameter of the chicken femoral arteries was 3.25±0.38 mm. The sleeve-technique showed the biggest pressure drib (56±16.41 mmHg), however, information technology was the fastest method. The tensile-force of unproblematic interrupted suture was 4.55±0.7 Newton (N), existence lower than of the intact vessel (6.viii ± 1.4 Due north). The tensile-strength did not differ significantly betwixt the 12-stitch simple interrupted and continuous sutures, however, the latter was stronger. The anastomoses made on thread model were significantly stronger than the ones on vessels.

Decision

The main variables were the number of stitches and the force of the vessel. The pressure drop was not correlated with the stitch number. One incorrect stitch can dramatically increase the leakage. Although the sleeve-technique is quick to be performed, it cannot withstand loftier pressure. The suture textile itself is far stronger then the vessel. The vessel tensile strength was decreased in the anastomoses. For the given vessel diameter more than 8 stitches should be used.

Keywords

Microvascular anastomosis

Microsurgery

Biomechanics

Tensile strength

Elongation

Elasticity

Pressure resistance

Pedagogy and training

© 2020 The Authors. Published past Elsevier Ltd.