Negative exploration for lumbar disc prolapse--findings and possible causes

Area of Science:

• Neurosurgery
• Orthopedic Surgery
• Spinal Surgery

Background:

• Lumbar disc operations are common procedures.
• Negative explorations, where no disc prolapse is found, present unique challenges.

Purpose of the Study:

• To analyze the causes and outcomes of negative lumbar disc explorations.
• To identify factors contributing to misdiagnosis and technical errors in spinal surgery.

Main Methods:

• Retrospective analysis of 32 negative exploration cases from a series of 3,032 lumbar disc operations.
• Data collected from 15 hospitals via questionnaires and computer-aided analysis.
• Review of pre-operative and intra-operative findings.

Main Results:

• Negative explorations accounted for approximately 1.05% of lumbar disc operations.
• Primary causes identified: genuine misdiagnosis (e.g., osteochondrotic compression, epidural venous distension, root tension) and poor surgical technique.
• Outcomes in negative exploration cases were less favorable than the overall series but better than other complicated surgical courses.

Conclusions:

• Understanding the causes of negative explorations is crucial for improving surgical outcomes.
• A systematic approach and careful pre-operative assessment can help minimize negative explorations.
• Guidelines for surgical procedures when expected disc prolapse is not found are proposed.