A trocar is a medical instrument used primarily in surgical procedures. It consists of a sharp-pointed metal rod, often encased in a protective sleeve, which allows for the insertion of other instruments into the body. Trocars are commonly used in minimally invasive surgeries, such as laparoscopic procedures, where small incisions are made to reduce recovery time and minimize scarring. In addition to surgery, trocars can also be used for diagnostic purposes, such as obtaining fluid samples from the abdomen or chest. They are essential tools in the fields of surgery and medicine, helping to facilitate various procedures safely and effectively.