A radiologist asks the technologist to assist with a fluoroscopic lumbar myelogram on an adult with chronic low back pain and prior spinal fusion, requiring prone positioning, sterile lumbar puncture, and intrathecal contrast injection with table tilting. Which technologist assisting role best supports safe myelography and lumbar puncture protocol for this spine case?

Safe fluoroscopic lumbar myelography requires sterile lumbar puncture setup and table tilting only under direct radiologist direction; the technologist assists rather than independently performing the puncture or injecting contrast. The contrast must be an approved nonionic, water-soluble intrathecal agent. The approach that skips checking fusion levels fails because fusion can distort landmarks, create hardware artifact, or obliterate the subarachnoid space at operated levels; proceeding without operative notes, hardware review, and fluoroscopic localization risks failed access, poor opacification, or neural injury. The approach using ionic high-osmolar contrast fails pharmacologically: only specific nonionic low-osmolar agents are approved for intrathecal use, while intravenous ionic high-osmolar agents are neurotoxic and can cause seizures, arachnoiditis, or severe injury. The approach that omits coagulation screening fails on hemostasis and infection safety: anticoagulant or antiplatelet use, coagulopathy, or infection risk can lead to bleeding, hematoma, or meningitis, which sterile technique cannot prevent. Exam caveat: do not confuse assisting with independently performing the puncture or injecting contrast, and do not choose an intravenous or ionic agent just because positioning sounds correct. Practical check: confirm identity, consent, allergies, anticoagulant hold, labs, fusion levels and site, contrast name, dose and expiration, sterile integrity, and fluoroscopy setup; move the table only on command and monitor neurologic status continuously.