A cannula needle is called a trocar.
Understanding Cannulas and Trochars
A cannula is a tube that can be inserted into the body, often to drain fluid, deliver medication, or insert a surgical instrument. According to Wikipedia, cannulas normally come with a trocar inside. The trocar is a sharp, pointed needle that is used to puncture the body and create an opening so that the cannula can be inserted into the intended space (Cannula - Wikipedia).
Key functions of a Trocar:
- Puncturing Tissue: The trocar's primary function is to pierce through the skin and underlying tissues, creating a clear path for the cannula.
- Facilitating Cannula Insertion: By creating an initial opening, the trocar makes it easier and less traumatic to insert the cannula into the body.
- Maintaining Sterility: The trocar is typically sterile, reducing the risk of infection during the insertion process.
Example Use Case
Imagine a doctor needs to drain fluid from a patient's abdomen. They would first insert the trocar through the skin and into the abdominal cavity. Once the trocar is in place, the cannula is slid over the trocar and into the cavity. The trocar is then removed, leaving the cannula in place to drain the fluid.
