Low-temperature urine collection apparatus for laboratory rodents

Area of Science:

• Veterinary science
• Laboratory animal science
• Biomedical research

Background:

• Accurate urine collection is crucial for metabolic and toxicological studies in laboratory animals.
• Existing methods may compromise sample integrity or animal welfare.
• A need exists for improved, continuous urine collection systems for small rodents.

Purpose of the Study:

• To develop and evaluate a novel apparatus for long-term, low-temperature urine collection from unrestrained small laboratory animals.
• To ensure urine sample integrity by maintaining a consistent low temperature (-19°C).
• To assess the system's reliability and maintenance requirements during extended operation.

Main Methods:

• Design and construction of a cooling unit capable of housing five rodent metabolism cages.
• Integration of a temperature control system to maintain -19°C.
• Testing the apparatus over a 5-6 week continuous operation period with standard laboratory rodents.

Main Results:

• The developed apparatus successfully collected urine samples at -19°C from unrestrained rodents.
• The cooling unit accommodated five metabolism cages, allowing for parallel sample collection.
• The system operated continuously for 5-6 weeks with minimal maintenance, requiring only specimen removal and routine cleaning.

Conclusions:

• The novel apparatus provides a reliable and efficient method for collecting urine samples at low temperatures from small laboratory animals.
• This system minimizes sample degradation and supports long-term metabolic research.
• The low-maintenance design enhances its practicality for routine laboratory use.