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Reusable trocar assemblies are the most common type used in veterinary medicine. These include smooth and threaded, a.k.a. Ternamian, stainless steel trocars (ssss1 and ssss1). These have the advantages of being easy to clean and sterilize with a long shelf life. The plastic valves that attach to these trocars are also autoclavable, but they eventually wear or crack over time. The threaded cannulas can be used without an obturator as the distal end is shaped to penetrate the body wall and screw into place, avoiding the need for retention sutures. These may be difficult to place through very thick tissue planes without appropriate insufflation pressures or without an appropriately sized skin incision.

ssss1 Disposable bladeless cannula with a safety shield.

ssss1 Disposable optical view cannula–trocar with an internal flange and balloon for improved retention.

ssss1 Different sizes of smooth stainless steel reusable cannulas.

Source: © 2014 Photo courtesy of KARL STORZ SE & CO, KG.