Trocars are another kind of instrument which is used during surgery. It has a sharp point which is used in creating a hole in the body. Once the hole is made using trocars, other tools and instruments can be used to conduct the procedure. Cannulas are tubes to which these trocars are attached. Surgical tools are then passed through the cannula, into the Trocars and then to the body. One surgery in which trocars are used widely is the laparoscopic surgical procedure .Tetra Surgical is hospital equipment manufacturing company.