Question explored with the scientific record
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- 2 CCSVI is the ballooning surgery available in Australia and is it safe
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CCSVI is the ballooning surgery available in Australia and is it safe
The honest answer: nobody has shown this procedure is safe, and nobody has shown it works.
The question is whether balloon angioplasty for CCSVI, sold in Australia, is safe. The evidence in front of me does not contain a single safety trial of the procedure in MS patients. What it contains is a critical review that flagged safety concerns around endovascular intervention and called for rigorously controlled multicenter research before endorsing it [2]. That is not a safety record. It is a warning that the safety record did not exist when that review was written.
The closest thing to outcome data is a survey of 476 people who had the venoplasty, and it is self-reported, uncontrolled, and about diet, not safety [4]. It reports symptom scores falling over the first three months after the procedure in all diet groups [4]. A symptom score that improves after an operation with no sham comparison is exactly what you would expect from placebo, regression to the mean, and hope. It tells you nothing about whether the vein stayed open, whether it re-narrowed, or whether anyone was hurt.
The mechanism matters for the risk side. Ballooning a vein tears and stretches the vessel wall; stents placed in neck veins can clot, migrate, or narrow again. The retrieval does not give me a rate for any of this, and I will not invent one. What I can say is that the rationale for the procedure is weak: blinded studies found CCSVI no more common in MS patients than controls [3], and a rat model of the blockage produced iron buildup but no demyelination or inflammation [1].
| What we have | What it shows | What it cannot show |
|---|---|---|
| Critical review [2] | Safety concerns, calls for controlled trials | Any actual safety rate |
| Self-report survey, 476 patients [4] | Symptoms fell over 3 months | Causation, harm, vein patency |
| Blinded case-control [3] | 0 patients vs 1 control with CCSVI | Benefit of treating it |
My call: I cannot tell you this procedure is safe, because no controlled safety data for it appears here, and the underlying rationale has failed in blinded studies. Confidence: moderate that the evidence does not establish safety; low on any specific harm rate, because none is in front of me.
Sources used 4
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Failure of the vascular hypothesis of multiple sclerosis in a rat model of chronic cerebrospinal venous insufficiency
This study investigates the vascular hypothesis of multiple sclerosis by examining the effects of chronic cerebrospinal venous insufficiency in a rat model, finding no evidence of demyelination or inflammation despite significant iron deposition in the brain.
DOI: 10.5114/fn.2017.66713 -
Chronic cerebrospinal venous insufficiency and multiple sclerosis
A critical viewpoint evaluating the CCSVI hypothesis (venous insufficiency) in multiple sclerosis, outlining methodological limitations of prior studies, safety concerns surrounding endovascular interventions, and the need for rigorously controlled multicenter research before en…
DOI: 10.1002/ana.22001 -
Chronic cerebrospinal venous insufficiency is not more prevalent in patients with mild multiple sclerosis: a sonographer-blinded, case-control ultrasound study
Blinded ultrasound case-control study of CIS and mild RRMS patients (EDSS ≤2) and age- and sex-matched controls finds CCSVI is not more prevalent in patients, arguing against a causal role for CCSVI in early MS, though IJV valve variation may be more common in patients.
DOI: 10.1177/1352458512459986 -
Self-Reported Diet and Health Outcomes of Participants of the CCSVI-Tracking Survey Study
In an international cohort of 476 people with multiple sclerosis who had CCSVI venoplasty, a Mediterranean dietary pattern was associated with higher quality of life and fewer symptoms, whereas adherence to an MS-specific diet showed no advantage over other diets.
DOI: 10.3390/nu13061891