Fig. 1From: Do epinephrine auto-injectors have an unsuitable needle length in children and adolescents at risk for anaphylaxis from food allergy?Novel approach for measuring the distance from skin to bone and skin to muscle. To obtain an intramuscular injection, the STMD must be at the most the exposed needle length minus 2 mm (needle orifice). There is a risk of intraosseous injection if the STBD is less than the full exposed length of the needle (also see Table 1)Back to article page