In lieu of requoting ampabhb's post with those articles, I post here.
Those articles when read critically, would not prompt me to send a patient for IDET. There are other articles which do not support it's use. Here are 3.
Spine (Phila Pa 1976). 2007 May 1;32(10):1146-54.
Percutaneous thermocoagulation intradiscal techniques for discogenic low back
pain.
Urrútia G, Kovacs F, Nishishinya MB, Olabe J.
Centro Cochrane Iberoamericano, Servei d'Epidemiologia i Salut Pública, Hospital
de la Santa Creu i Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.
[email protected]
Comment in:
Spine (Phila Pa 1976). 2007 Dec 1;32(25):2927-8; author reply 2928-9.
STUDY DESIGN: Systematic review. OBJECTIVE: To systematically review the evidence
on the efficacy, effectiveness, and safety of percutaneous thermocoagulation
intradiscal techniques for discogenic low back pain. SUMMARY OF BACKGROUND DATA:
The intervertebral disc is thought to be the source of pain in a relevant
proportion of cases of low back pain (LBP). Two percutaneous thermocoagulation
intradiscal techniques have been described to treat discogenic LBP: percutaneous
intradiscal radiofrequency thermocoagulation (PIRFT) and intradiscal
electrothermal therapy (IDET). METHODS: An electronic search was performed in
MEDLINE, EMBASE, and the Cochrane Library databases up to 2005, to identify
nonrandomized controlled trials and randomized controlled trials (RCTs) on those
techniques. All relevant studies were methodologically assessed independently by
3 reviewers. RCTs were assessed following the criteria recommended by the
Cochrane Back Review Group. A qualitative synthesis of results was performed.
RESULTS: Six studies were included with a total of 283 patients. Two open,
nonrandomized trials (95 patients) showed positive results for IDET compared with
rehabilitation and PIRFT. Results from 2 RCTs showed no differences between PIRFT
and placebo, and between different PIRFT techniques. Two RCTs compared IDET with
placebo. One suggested differences only in pain and in disability, while the best
quality RCT showed no differences. CONCLUSIONS: The available evidence does not
support the efficacy or effectiveness of percutaneous thermocoagulation
intradiscal techniques for the treatment of discogenic low back pain.
PMID: 17471101 [PubMed - indexed for MEDLINE]
2. Eur Spine J. 2006 Aug;15 Suppl 3:S448-57. Epub 2006 Jul 26.
IDET: a critical appraisal of the evidence.
Freeman BJ.Centre for Spinal Studies and Surgery, Queen's Medical Centre, UniversityHospital, Nottingham, UK.
[email protected]
Smith and Nephew (Endoscopy division, Andover, MA, USA) have estimated that60,000 Intra-Discal Electrothermal Therapy (IDET) procedures have been performed world wide up to June 2005. Despite the large number of procedures performed, acritical appraisal of the evidence of efficacy of IDET has not appeared in theliterature. This paper reviews the current evidence of clinical efficacy for IDETobtained via a systematic review of the literature. Studies were included if theyused at least one of four specified primary outcome measures; pain intensity asassessed by a visual analogue score (VAS), global measurement of overallimprovement, back specific functional status such as Oswestry disability Index(ODI) and return to work. Levels of evidence were assigned according to thehierarchy described by the Oxford Centre for Evidence-Based Medicine(
www.cebm.net). Papers addressing possible mechanisms of action of IDET were not considered as the focus of the literature review was clinical effectiveness.Eleven prospective cohort studies (level II evidence) were reported on a total of256 patients with a mean follow-up of 17.1 months (range 12-28 months). The mean improvement in the VAS for back pain was 3.4 points (range 1.4-6.5) and the mean improvement in ODI was 5.2 points (range 4.0-6.4). A total of 379 patients werereported in five retrospective studies (level III evidence). Between 13 and 23%of patients subsequently underwent surgery for low back pain within the studyperiod. Two randomised controlled trials of IDET have been reported in theliterature. The first randomised 64 patients (37 to IDET, 27 to Sham). Theadvantage for IDET patients amounted to 1.3 points on the VAS and seven points onthe ODI. The second study randomised 57 subjects (38 to IDET, 19 to Sham) andshowed no benefit from IDET over placebo. The evidence for efficacy of IDETremains weak and has not passed the standard of scientific proof.PMCID: PMC2335390PMID: 16868786 [PubMed - indexed for MEDLINE]
3. Spine (Phila Pa 1976). 2005 Nov 1;30(21):2369-77; discussion 2378.A randomized, double-blind, controlled trial: intradiscal electrothermal therapy versus placebo for the treatment of chronic discogenic low back pain.
Freeman BJ, Fraser RD, Cain CM, Hall DJ, Chapple DC.Department of Orthopaedics and Trauma, Royal Adelaide Hospital, Adelaide, SouthAustralia.
[email protected]ent in: Spine (Phila Pa 1976). 2006 May 20;31(12):1402; author reply 1402-3. Spine (Phila Pa 1976). 2006 Jun 15;31(14):1636; author reply 1636-7. Spine (Phila Pa 1976). 2006 Jun 15;31(14):1637-8; author reply 1638.
STUDY DESIGN: A prospective, randomized, double-blind, placebo-controlled trialof intradiscal electrothermal therapy (IDET) for the treatment of chronicdiscogenic low back pain (CDLBP). OBJECTIVES: To test the safety and efficacy of IDET compared with a sham treatment (placebo). SUMMARY OF BACKGROUND DATA: InNorth America alone, more than 40,000 intradiscal catheters have been used totreat CDLBP. The evidence for efficacy of IDET is weak coming from retrospective and prospective cohort studies providing only Class II and Class III evidence.There is one study published with Class I evidence. This demonstratesstatistically significant improvements following IDET; however, the clinicalsignificance of these improvements is questionable. METHODS: Patients with CDLBP who failed to improve following conservative therapy were considered for thisstudy. Inclusion criteria included the presence of one- or two-level symptomatic disc degeneration with posterior or posterolateral anular tears as determined by provocative computed tomography (CT) discography. Patients were excluded if therewas greater than 50% loss of disc height or previous spinal surgery. Fifty-seven patients were randomized with a 2:1 ratio: 38 to IDET and 19 to sham procedure(placebo). In all cases, the IDET catheter was positioned to cover at least 75%of the annular tear as defined by the CT discography. An independent technicianconnected the catheter to the generator and then either delivered electrothermal energy (active group) or did not (sham group). Surgeon, patient, and independent outcome assessor were all blinded to the treatment. All patients followed astandard postprocedural rehabilitation program. Independent statistical analysis was performed. OUTCOME MEASURES: Low Back Outcome Score (LBOS), OswestryDisability Index (ODI), Short Form 36 questionnaire (SF-36), Zung DepressionIndex (ZDI), and Modified Somatic Perceptions Questionnaire (MSPQ) were measured at baseline and 6 months. Successful outcome was defined as: no neurologicdeficit, improvement in LBOS of greater then 7 points, and improvement in SF-36subsets (physical function and bodily pain) of greater than 1 standard deviation.RESULTS: Baseline demographic data, initial LBOS, ODI, SF-36, ZDI, and MSPQ were similar for both groups. No neurologic deficits occurred. No subject in eitherarm showed improvement of greater than 7 points in LBOS or greater than 1standard deviation in the specified domains of the SF-36. Mean ODI was 41.42 atbaseline and 39.77 at 6 months for the IDET group, compared with 40.74 atbaseline and 41.58 at 6 months for the placebo group. There was no significantchange in ZDI or MSPQ scores for either group. CONCLUSIONS: The IDET procedureappeared safe with no permanent complications. No subject in either arm metcriteria for successful outcome. Further detailed analyses showed no significant change in outcome measures in either group at 6 months. This study demonstratesno significant benefit from IDET over placebo.PMID: 16261111 [PubMed - indexed for MEDLINE]