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Related Experiment Videos

A simple method for short-term controlled anesthesia in newborn mice.

Estelle Drobac1, Estelle Durand, Vincent Laudenbach

  • 1Developmental Neurology and Physiology Laboratory, INSERM E9935, Robert-Debré Teaching Hospital, 48 Bd Sérurier, 75019 Paris, France.

Physiology & Behavior
|July 28, 2004
PubMed
Summary

This study presents a simple, inexpensive method for short-term anesthesia and rapid recovery in newborn mice using isoflurane. The technique effectively manages pain responses without mortality, making it ideal for developmental research.

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Area of Science:

  • Veterinary Anesthesiology
  • Developmental Biology
  • Animal Models

Background:

  • Neonatal mice require safe anesthesia for research.
  • Existing methods may pose risks or lack rapid recovery.
  • Developing effective anesthesia is crucial for preclinical studies.

Purpose of the Study:

  • To describe a simple, cost-effective method for inducing short-term anesthesia in newborn mice.
  • To evaluate the efficacy and safety of the anesthesia method.
  • To assess the speed of recovery from anesthesia in neonatal mice.

Main Methods:

  • Newborn Swiss mice pups (postnatal days 2, 5, 8) were exposed to an estimated 32% isoflurane for 30 seconds in a syringe.
  • Anesthesia efficacy was tested via nociceptive response to tail clamp.

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  • Recovery was assessed using water drop test and righting reflex tests.

    • Main Results:

    • The isoflurane method induced effective anesthesia, abolishing nociceptive responses without mortality across all tested ages.
    • Pups showed recovery of defensive responses to water drops.
    • Righting reflex recovery was not significantly affected by the anesthesia or time.

    Conclusions:

    • This isoflurane-based anesthesia method is safe, effective, and allows for rapid recovery in newborn mice.
    • The protocol can be adjusted for different ages, strains, or species.
    • It is well-suited for behavioral and physiological studies requiring preclinical noxious procedures.