"Shaving" - what is it, definition of the term
The practice of cutting away surface hair with a razor, blade, or comparable cutting instrument to produce a smooth skin surface constitutes a method of hair removal that removes the visible portion of the hair shaft, typically performed for personal grooming, medical preparation, or aesthetic purposes.
Detailed information
Hair removal from laboratory rodents is a standard preparatory step for procedures that require direct skin access, precise dosing, or visual assessment of dermal conditions. The process involves eliminating the dense pelage of rats and mice to expose a clear area of skin while minimizing stress and injury.
A typical protocol includes the following elements:
- Equipment – disposable electric clippers with fine-toothed blades, sterile stainless‑steel scissors, or single‑use razor blades designed for small mammals. Clippers are preferred for speed and reduced heat generation.
- Preparation – animals are gently restrained using a calibrated restrainer or a brief inhalation anesthetic. The work surface is covered with a clean, non‑slip mat to prevent slipping.
- Technique – the clipper is positioned at a 45‑degree angle to the fur, moving in short strokes from the base of the whisker pad toward the tail. For delicate regions such as the abdomen or dorsal midline, a single‑use blade may be employed to achieve a smoother finish.
- Safety measures – avoid prolonged contact of the blade with the skin to prevent abrasions. Inspect the device for dullness before each use; a dull blade increases friction and heat, raising the risk of burns.
- Post‑procedure care – after hair removal, the animal is placed in a warmed recovery cage until normal activity resumes. The exposed skin is examined for cuts, erythema, or signs of infection. If any lesions are identified, apply a sterile topical antiseptic and monitor closely.
Common applications of this practice include:
- Surgical interventions – providing a sterile field for incisions, catheter insertions, or biopsy sampling.
- Topical drug testing – allowing uniform absorption of creams, gels, or patches.
- Physiological measurements – enabling accurate placement of electrodes, thermistors, or imaging probes.
Effective hair removal reduces variability in experimental outcomes by ensuring consistent exposure of the target tissue. Proper technique, appropriate tools, and diligent post‑procedure monitoring are essential to maintain animal welfare and data integrity.