Intraperitoneal injection of mice

Area of Science:

• Veterinary Medicine
• Animal Research Techniques

Background:

• Intraperitoneal injections are common in mouse research.
• Previous studies reported significant placement errors (14%) inherent to the technique.

Purpose of the Study:

• To investigate and identify causes of error in mouse intraperitoneal injection placement.
• To determine if technical modifications can reduce injection placement errors.

Main Methods:

• Systematically varied technical parameters of intraperitoneal injection in mice.
• Parameters included needle size, injection site (left vs. right quadrant), investigator, needle angle, and injection speed.

Main Results:

• Consistent errors in intraperitoneal injection placement were observed.
• None of the tested technical modifications (needle size, site, investigator, angle, speed) reliably reduced placement errors.

Conclusions:

• The error in mouse intraperitoneal injection placement appears to be a persistent challenge.
• Further research may be needed to develop more accurate injection methods.