Shrinkage- At least it's not harmful
Intradiscal electrothermal therapy (IDET) is increasingly being used in the management of chronic spinal pain, to the tune of about 40K procedures a year in North America. IDET is performed under video fluoroscopy and involves placing a catheter needle in the “symptomatic” disc and heated to 90 C. The thermal energy has been shown to coagulate neural tissue, shrink collagen fibrils and thereby potentially reduce both the nociceptive and mechanical components of discogenic pain. However, the recent high quality double blind RCT by Freeman and colleagues (Download IDET_Placebo_RCT_Spine_2005.pdf) demonstrated no benefit of IDET over placebo. It was interesting that these individuals had relatively high disability scores and yet less than 30% had received physical therapy prior to enrolling in the trial (see Table 3). There were no reported complications from the procedure so despite being ineffective it appears that IDET is a relatively safe procedure.
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