Methylene blue test

What the risks are:

Risks associated with an angiocatheter are minor:

• excessive bleeding
• fainting or feeling lightheaded
• hematoma (blood accumulating under the skin)
• infection (a slight risk any time the skin is broken, but the chances of infection increase the longer the IV remains in the vein)
• multiple punctures to locate veins

Special considerations:

Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people or inserting an IV may be more difficult in you or your child than in others.