intracutane
Intracutane, commonly described as intracutaneous or intradermal injection, refers to the administration of substances into the dermal layer of the skin, the tissue beneath the epidermis. The technique targets a shallow depth, typically about 1 to 2 millimeters, using a fine-gauge needle (generally 27–30 gauge) inserted at a shallow angle to form a small wheal or bleb. The dermis contains abundant immune cells, including Langerhans cells, which makes this route particularly useful for diagnostic tests and certain vaccines.
Common indications include allergy skin testing, where intradermal injections assess hypersensitivity to specific allergens, and the
Advantages of the intradermal route include strong local immune activation and the requirement for smaller volumes.
In practice, intracutaneous and intradermal are often used interchangeably, though some clinicians reserve intracutaneous for historical