Which procedure requires the use of a jack-knife position?

The jack-knife position, also known as the Kraske position, is commonly used for procedures involving the rectum and lower back. This positioning involves the patient lying on their abdomen with their hips elevated and the torso lowered, formed like a "V". It provides optimal access to the rectal area, making it ideal for rectal instrumentation procedures such as examinations, the insertion of tools for biopsies, or other interventions that require clear visibility and access.

In the context of this question, the rectal instrumentation is the procedure that specifically necessitates this positioning to ensure both patient comfort and the efficiency of the procedure. Other exams and procedures mentioned do not typically require the same degree of access or positioning; for example, gynecological exams use different positioning, while chest and EENT examinations have their own standard positions that do not involve the jack-knife configuration.