Objective- While many of studies have evaluated effects of trocar on incision characteristics non has taken the design of the cannula into consideration. This study was conducted to figure out the type of cannula design which is associated with a better healing at the i More
Objective- While many of studies have evaluated effects of trocar on incision characteristics non has taken the design of the cannula into consideration. This study was conducted to figure out the type of cannula design which is associated with a better healing at the insertion site, and to investigate if the size of incision in the port site has an effect on the healing process.
Procedure-6 trocars were inserted in each dog. five animals were used, allowing the total number of 10 insertions for 7 mm incisions and threaded cannula (group A), 10 insertions for 10 mm incision and threaded cannula (group B) and 10 for 10 mm incision and smooth cannula (Group C), which constituted 3 groups of study.
Results-Macroscopic and Histopathology comparison between group A and group B revealed significantly higher degenerative changes and necrosis in the dermal and muscle layer and a higher loss of the peritoneal lining in group A than B. Hemorrhage in the dermal layer of the skin and acute inflammatory reaction was significantly higher in group B compared with C .
Conclusions - This study showed that a smaller incision than the trocar’s external diameter has destructive effects on the tissues. Moreover, using a trocar with a threaded cannula can have harmful effects on the surrounding tissues and it is considered more destructive than a smooth cannula.
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