Which of the following is an example of a cannulated instrument?

Which of the following is an example of a cannulated instrument?

• A. Pectus clamp
• B. Poole suction
• C. Scalpel
• D. Forceps

Answer: (B)

A cannulated instrument is specifically designed with a hollow channel or lumen that allows for the passage of fluids or other instruments through it. The correct example of a cannulated instrument from the choices given is the Poole suction. This device is commonly used during surgical procedures for suctioning fluids, and it is designed with a hollow shaft that enables it to remove fluids efficiently from a surgical site without clogging.

In contrast, other options do not have a hollow structure that accommodates such functionality. For instance, a pectus clamp is a solid instrument used to grasp tissue, and a scalpel is simply a cutting instrument without any lumen. Forceps can also be solid tools used for grasping, but they typically do not incorporate a channel for fluid passage. Understanding the distinct purpose of a cannulated instrument clarifies why the Poole suction is the correct choice in this context.