Final answer:
The stethoscope is the instrument that is NOT used in otorhinolaryngology surgery.
Step-by-step explanation:
The instrument that is NOT used in otorhinolaryngology surgery is the stethoscope.
Otorhinolaryngology surgery, also known as ENT (ear, nose, and throat) surgery, primarily involves the diagnosis and treatment of diseases and disorders of the head and neck region. The tools used in this type of surgery include the endoscope, which allows doctors to visualize internal organs and perform minimally invasive procedures; the microscope, which provides a magnified view of structures during delicate surgeries; and the laryngoscope, which is used to examine the throat and vocal cords. The stethoscope, on the other hand, is a medical device commonly used to listen to and amplify sounds produced by the body, mainly for cardiovascular and respiratory assessments.