What is a trocar and cannula used for?
What is a trocar and cannula used for?
Abstract. Trocars are used during laparoscopic procedures and other minimally invasive surgery (MIS) to make small, puncturelike incisions in outer tissue layers. These incisions allow surgeons to insert cannulas through which surgical instruments can be introduced.
What is the difference between a trocar and cannula?
Summary. In its simplest configuration, a trocar is a pen-shaped instrument with a sharp triangular point at one end, typically used inside a hollow cylinder, known as a cannula or sleeve, which provides an access port into a cavity during surgery.
What is Hasson technique?
A technique used in laparoscopic surgery in which the skin, muscle, fascia, and peritoneum are incised under direct vision to allow the insertion of a blunt trocar, through which the laparoscope is introduced.
How do you hold a trocar and cannula?
Trocar and cannula should be held in a proper way in hand so that head of the trocar should rest on the thenar eminence, the middle finger should rest over the gas inlet and the index finger is pointed towards the sharp end of the trocar.
What are surgical trocars?
Surgical trocars and laparoscopic trocars are pointed, pencil-shaped instruments that are placed inside of a hollow tube (known as a trocar sleeve or trocar cannula) and used to pierce an opening in the body.
What types of trocars are used for laparoscopy?
The following trocar types were examined: radially expanding versus cutting (six studies; 604 participants), conical blunt-tipped versus cutting (two studies; 72 participants), radially expanding versus conical blunt-tipped (one study; 28 participants) and single-bladed versus pyramidal-bladed (one study; 28 …
How do you place a trocar?
The anterior abdominal wall must be adequately elevated by hand, and the trocar is inserted directly into the cavity, aiming toward the pelvic hollow. As an alternative, the abdominal wall is elevated by pulling on two towel clips placed 3 cm on both sides of the umbilicus, and the trocar is inserted at a 90° angle.
What is a Hasson trocar?
Hasson trocars, the first modern trocars, named after Harrith Hasson, MD, are non-bladed trocars inserted using the open, or direct-cut, method. Direct cut is one of the most common and safest methods of laparoscopic access. The surgeon dissects the tissue layers to ensure safe entry into the abdomen.
