Читать книгу Small Animal Laparoscopy and Thoracoscopy - Группа авторов - Страница 102

A cannula is a tube‐shaped metal or plastic shaft placed in the patient to allow access into the abdominal cavity during a laparoscopic procedure. Cannulas are sometimes sutured in place to the body wall or thoracic wall to ensure they do not migrate; they can also be screwed in place or held in place by inflatable balls and plastic flanges. Sheaths are protective shafts that are usually locked in place on the telescope, such as used with cystoscopes and arthroscopes [1].