Stocker and Bonsu developed a simple equation for optimum depth of spinal needle insertion during a lumbar puncture performed on a pediatric patient. The authors are from Children's Hospital in Columbus, Ohio.

Patient selection: > 3 months to 19 years



(1) body weight in kilograms


depth of needle for lumbar puncture in mm =

= (0.5 * (body weight)) + 18

To read more or access our algorithms and calculators, please log in or register.