Spraying urea solution reduces formaldehyde levels during gross anatomy courses

Area of Science:

• Anatomy and histology
• Toxicology
• Chemistry

Background:

• Formaldehyde (FA) is essential for embalming cadavers for gross anatomy education.
• Student and educator exposure to FA poses significant health risks.
• Reducing FA levels in dissection halls is crucial for safety.

Purpose of the Study:

• To investigate the efficacy of FA scavenger solutions in reducing formaldehyde levels.
• To identify the most effective FA scavenger for dissection hall environments.
• To assess the impact of FA reduction on cadaver preservation.

Main Methods:

• Tested L-cysteine, N-ethyl urea, and urea as FA scavengers.
• Measured FA levels in liquid, wet paper towels, organs, and cadavers.
• Sprayed urea solution onto surfaces and cadavers in a dissection hall.
• Monitored FA levels over time post-application.

Main Results:

• Urea demonstrated the strongest formaldehyde scavenging power in liquid solutions.
• Optimal urea concentration matched FA molar concentration for volatilized FA reduction.
• Urea spray rapidly decreased volatilized FA, with sustained low levels for 240 minutes.
• FA levels in the dissection hall significantly decreased after urea application to cadavers.
• Cadaver preservation was maintained throughout the 4-month dissection course.

Conclusions:

• Urea solution spray is an effective method for reducing formaldehyde levels in anatomy dissection halls.
• This approach enhances safety for students and educators by minimizing FA exposure.
• Urea spray supports effective cadaver preservation, facilitating uninterrupted gross anatomy training.