MDRAO Practice Exam 2025 – Complete Exam Prep Resource

A box lock on a surgical instrument serves the primary function of acting as a hinge. It allows the instrument to open and close properly, facilitating its use during surgical procedures. This hinge mechanism is critical for the proper functioning of instruments such as scissors, forceps, or clamps, enabling smooth movement and precision in surgical tasks.

The box lock ensures that the two arms of the instrument are securely connected while allowing for the necessary range of motion. This design is essential for instruments that require accurate gripping or cutting actions, as it helps maintain alignment and control during delicate procedures.

While grip, securing electrical components, and controlling fluid flow are important functions in the context of surgical instruments, these functions are not managed by a box lock. Instead, these features pertain to different aspects of instrument design and functionality, such as textured surfaces for grip or specific seals and valves for flow control.