What measurement unit is used for pressure in discography?

In discography, pressure is typically measured in millimeters of mercury (mmHg). This measurement is commonly used in medical diagnostics and procedures to quantify pressure, especially in relation to fluids and gas. Discography involves injecting a contrast material into the intervertebral disc space to assess for abnormalities and pain sources.

Pressure readings in mmHg provide clinicians with a standardized understanding of the pressure within the disc, which can be significant in evaluating conditions such as disc herniation or degenerative disc disease.

While pounds per square inch, pascal, and atmospheres are valid units of pressure measurement in various contexts, mmHg is the most relevant and widely accepted unit used specifically in the context of discography to maintain consistency with other medical practices. Thus, millimeters of mercury is the correct and preferred unit for this procedure.