Mid-spinal canal depth by weight, mean and 95% centile

Warning! The intended audience of this article is medical professionals and students. I am not your doctor. This article is not medical advice. This article has not been subject to formal peer review. The following graph shows mean and 95% centile mid-spinal canal depth (MSCD) by weight for children 0.5 kg to 80 kg: The underlying data are sourced from the graphs in: Arthurs OJ, Murray M, Zubier M, Tooley J, Kelsall W. Ultrasonographic determination of neonatal spinal canal depth. Archives of Disease in Childhood Fetal and Neonatal Edition. 2008;93:F451–4. doi: 10.1136/adc.2007.129221 (for neonates/infants < 8 kg) Bailie HC, Arthurs OJ, Murray MJ, Kelsall AW. Weight-based determination of spinal canal depth for paediatric lumbar punctures. Archives of Disease in Childhood. 2013;98:877–80. doi: 10.1136/archdischild-2013-303793 (for children > 8 kg) The blue line indicates the mean mid-spinal canal depth by weight, according to the rounded formulas recommended by each paper (MSCD (mm) =…