Experimental Investigations on Intestinal Anastomosis - a Comparison Between Automatic and Hand Suturing Techniques Publisher



Khoorjestan SM¹ ; Rouhi G¹ ; Toolabi K² Show Affiliations
Source: Journal of Mechanics in Medicine and Biology Published:2016

Abstract

In this research, intestinal anastomosis was compared in hand and automatic suturing. This work is based on two different experiments: The first one is the tensile test with the aim of finding the maximum breaking strength with the elongation rate of 5mm/min; and the second one is the fatigue test with a frequency of 0.2Hz and the amplitude of 16, 24 and 32mm of stretch in each phase to discover the total number of cycles to failure. For this purpose, 42 fresh bovine intestines were used; 21 specimens for the tensile and 21 for the fatigue test. These two tests were compared by two hand sewing techniques: simple continuous and ford interlocking stitches, and one automatic technique, i.e., the lock stitches. Seven samples were examined for each particular technique. The results of the tensile test indicated that the breaking strength of automatic sutured specimens is significantly greater than those of hand sutured specimens (p=1.31e-5). That might be due to the regularity, as the suturing lines by machines are more regular than suturing by hand. In addition, results showed that automatic sutured specimens failed in greater number of cycles than hand sutured specimens in the fatigue test (p=2.86e-6). © 2016 World Scientific Publishing Company.