What instrument is used to look into a joint?

The arthroscope is a specialized instrument designed specifically for viewing the interior of a joint. It is equipped with a camera and light source, allowing veterinarians to visualize the structures within the joint, such as ligaments, cartilage, and synovial tissue, which is essential for diagnosing various joint conditions and diseases. This tool can also facilitate minimally invasive surgical procedures within the joint, making it a vital instrument in veterinary medicine for treating injuries or conditions that affect the joints.

The hemostat is primarily used for controlling bleeding during surgical procedures by clamping blood vessels, but it does not possess the capabilities necessary for viewing inside a joint. A receiver typically refers to a device used in communication systems, not a medical instrument. An endoscope is used for visualizing the interior of hollow organs or cavities in the body, such as the gastrointestinal tract, but it is not specifically designed for joint examination. Thus, the arthroscope is the appropriate choice for this context.