Читать книгу Small Animal Laparoscopy and Thoracoscopy - Группа авторов - Страница 101

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. Rigid telescopes must be placed through a cannula in order to gain access to the body cavity. The literature shows a notable inconsistency of terminology; often trocar is used to describe the assembly of a cannula with its associated obturator. A cannula–trocar assembly is made up of three components: a cannula, seal, and obturator.