Biomechanical comparison of four technique for pelvic flexure enterotomy closure in horses.

The research article is a comparative study of four methods of pelvic flexure enterotomy closure in horses. The study recorded key factors such as time taken, costs, and functional parameters like bursting pressure and luminal reduction.

Research Methodology

• The research was conducted in an ex-vivo setup, implying the tests were carried out on organs outside the living horse bodies. The organs used were cadaveric ascending colon specimens from 48 horse cadavers.
• The study team performed pelvic flexure enterotomies, a surgical procedure where an incision is made in the intestine, of different lengths (5 cm, 10 cm) on these specimens. These enterotomies were then closed using one of four techniques: handsewn 2 layer (HS2), handsewn 1 layer (HS1), skin staples (SKS), or TA90 stapling device (TA90).

Key Observations and Findings

• In terms of the time to closure, the HS2 technique was found to be the most time-consuming for the 5 cm group. Yet, for the 10 cm group, the handsewn one-layer method (HS1) and the skin staples method (SKS) were faster than the others.
• The size of the luminal reduction, meaning the reduction in the inner opening or cavity of the intestine, did not vary significantly between the techniques in any group.
• In terms of bursting pressure, which can be understood as the pressure at which the closed incision would rupture, the HS2 technique evidenced higher resistance. It provided more strength than the skin staples and TA90 methods in the 5 cm group, and surpassed all the other methods in the 10 cm group.
• The study also considered the cost factor of each technique. The TA90 technique entailed the highest cost.

Conclusions from the Study

• The study concluded that the TA90 technique had the least resistance to bursting pressure, implicating the poorest strength amongst all methods. It also found this method to be the most expensive.
• Contrarily, the handseparated two-layer (HS2) method was found to be the most robust, showing high resistance to bursting pressures.