Development of surgical skill with singular neurectomy using human cadaveric temporal bones

Area of Science:

• Neurosurgery
• Anatomy
• Surgical Education

Background:

• Safe otological surgery demands extensive anatomical knowledge and surgical expertise.
• Evaluating the learning curve is crucial for surgical skill development.
• Gacek's singular neurectomy is a specific otological procedure requiring precision.

Purpose of the Study:

• To assess the learning curve and skill improvement of an otological surgeon performing Gacek's singular neurectomy on cadaveric specimens.
• To quantify the impact of repeated dissection on surgical accuracy and success rates.

Main Methods:

• Ninety-six human head halves were dissected using Thiel's embalming method, divided into four groups.
• The surgeon performed Gacek's approach, with outcomes categorized as 'direct hit,' 'indirect hit,' or 'no hit.'
• Success rates and error types were documented and analyzed across specimen groups and after initial attempts.

Main Results:

• The success rate for 'direct hits' increased from 54.2% in the first group to 87.36% in the fourth group.
• Overall successful operations reached 86.5% after the first attempt and 97.9% after a second attempt.
• The incidence of errors ('new allocations') decreased from 11 cases in the first group to zero in the fourth group.

Conclusions:

• Cadaveric dissection is invaluable for surgical training in otology.
• Performing a high volume of dissections demonstrably enhances surgeon experience and improves procedural success rates.
• This study validates the importance of extensive hands-on practice for mastering complex otological surgeries.