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.
Debt Ratio. A measure of a company's total debt to its total assets. A ratio less than one means that a company has more assets than debt, while a ratio of more than one means the opposite. A debt ratio is a measure of how risky it would be for a bank to extend a loan to a company, with a higher ratio indicating great risk. debt ratio.