Internal vascular channel architecture in human auditory ossicles

Area of Science:

• Anatomy
• Otolaryngology
• Medical Imaging

Background:

• The internal vascular architecture of human auditory ossicles is not well understood.
• Limited comparative studies exist on individual ossicular vascularization.

Purpose of the Study:

• To reconstruct and analyze the internal vascular channels of human auditory ossicles.
• To investigate individual variations and common patterns in ossicular vascular supply.
• To correlate vascular changes with bony erosion and ossicular density.

Main Methods:

• High-resolution micro-computed tomography (micro-CT) scans were used.
• Internal vascular channels and cavities were reconstructed from 12 sets of elderly donor ossicles.
• Ossicular densities were calculated.

Main Results:

• A common basic pattern of internal vascular channels was identified despite individual variations.
• The stapes footplate contains vascular channels.
• Bony erosion in the incus long process and stapes neck was observed in all specimens, often interrupting vascular channels.
• Malleus is denser than incus due to fewer vascular channels.

Conclusions:

• Internal vascular patterns in auditory ossicles exhibit significant individual variability.
• Bony erosion can compromise the vascular supply to ossicles, with implications for surgical procedures.
• Understanding ossicular vascularization is crucial for otologic surgery and managing conditions affecting hearing bones.