Lumbar puncture. Lumbar puncture (LP), also known as a spinal tap, is a medical procedure in which a needle is inserted into the spinal canal, most commonly to collect cerebrospinal fluid (CSF) for diagnostic testing. The main reason for a lumbar puncture is to help diagnose diseases of the central nervous system, including the brain and spine.
2. ratio-the relation between things (or parts of things) with respect to their comparative quantity, magnitude, or degree; an inordinate proportion of the book is given over to quotations; a dry martini has a large proportion of gin. proportion.
Details. Ratio: In simple mathematics, relationship or comparison between two more numbers is known as ratios. Ratios are normally written as : to show the connection between two numbers, for instance.If there are 2 red balls and 3 blue ball on the table you could write there ratio as: [2:3].Unfortunately there is no systematic way to calculate ratio, but there is an easy way around for doing the same, you can try the below formulas to calculate ratio in Excel.ROUND function in excel is used to trim down (reduce) a given value to a specific number of decimal places.f there are 2 red balls and 3 blue ball on the table you could write there ratio as: [2:3]. Unfortunately there is no systematic way to calculate ratio, but there is an easy way around for doing the same, you can try the below formulas to calculate ratio in Excel.