Thermostatic tissue platform for intravital microscopy: 'the hanging drop' model

Area of Science:

• Physiology
• Microscopy Techniques
• Surgical Instrumentation

Background:

• Intravital microscopy requires simultaneous control of animal body temperature and local tissue temperature.
• Maintaining stable thermal conditions is crucial for accurate observation of microcirculation.

Purpose of the Study:

• To develop and test a novel organ-support platform for intravital microscopy.
• To address the challenge of combined body and local organ temperature control during microscopy.

Main Methods:

• A custom organ bath platform was designed with integrated suction, superfusion tubes, and a thermometer probe.
• A 'hanging drop' technique using a cover glass and physiological solution was employed.
• The platform was tested using a rat ileum microcirculation preparation.

Main Results:

• The platform successfully maintained stable temperature and humidity for the observed tissue.
• The 'hanging drop' method prevented tissue quenching and ensured a clear visual field.
• Undisturbed microcirculation was achieved during the experiments.

Conclusions:

• The developed organ-support platform effectively addresses the temperature control challenges in intravital microscopy.
• This system facilitates stable and clear visualization of microcirculation in ex vivo preparations.
• The technique is valuable for physiological studies requiring precise thermal management.