What is the significance of measuring pressure from contrast injection until reaching 90 psi?

Measuring pressure from contrast injection until reaching 90 psi is significant because it helps in assessing the response of a chemically sensitive disc. When contrast material is injected into the intervertebral disc, monitoring the pressure can provide valuable information regarding the integrity of the disc and its physiological response to the injection.

A pressure reading around 90 psi can indicate that the disc is not only capable of containing the contrast material but also provides insight into whether the disc has the ability to respond to chemical stimuli. In particular, certain discs may be more reactive due to the presence of discogenic pain, and pressure measurements can help clinicians identify which discs may experience a change in pressure upon injection, potentially guiding further evaluation or treatment.

Assessing chemically sensitive disc response is crucial because it may help in differentiating between various types of back pain and in determining the best management strategies for individual patients. Overall, this measurement assists in understanding disc health and potential treatment pathways.