Osteoarthritis, Knee
Conditions
Keywords
Cooled radiofrequency, chronic knee pain, knee arthroplasty, genicular nerve
Brief summary
Analyze the results of cooled radiofrequency in patients with chronic knee pain after one year of follow- up.
Detailed description
The investigators performed a retrospective case-series reviewed of 40 patients who underwent cooled RF of genicular nerves. The investigators evaluated results of the survey of quality of life (SF36), knee society score (KSS) and the Visual Analogue Scale (VAS).
Interventions
PROCEDUREcooled radiofrequency ablation of genicular nerves
Cooled RF consists of creating an injury in the nerve trough a high frequency flow. Unlike conventional RF, in cooled RF through a closed circuit where intravenous flows, we can create an injury for a longer period of time, at a lower temperature (standard RFA 90º C, cooled RFA 60º C) and within an area 8 times larger. As the lesion is spherical, and larger (about 10-12 mm in diameter), the chances of neurolysis of the nerve increase.
Sponsors
José Andrés López Riquelme
María del Pilar Sanchís Cortés
Hospital Son Espases
Study design
Observational model
CASE_ONLY
Time perspective
RETROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
40 Years to 90 Years
Healthy volunteers
No
Inclusion criteria
* Chronic knee pain (older than 3 months, with no response to physiotherapy, medication or hyaluronic acid infiltration) with a pain intensity according to VAS\>7/10 * The radiological criteria were witness of OA with Kellgren-Lawrence index of 2 to 4. * Painful TKA with no apparent cause and with a radiological image where a proper placement was observed
Exclusion criteria
* Infection or lymphangitis of the member * Acute knee pain * Corticoids or hyaluronic acid infiltration with a high molecular weight prior to the surgery * Pregnancy * Severe neurological or psychiatric disorders * Patients with pacemakers
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Treatment success was defined as the number of subjects whose knee pain is reduced by ± 50% based on the Visual Analogue Scale (VAS). | one year after the procedure | The VAS is a 11- point scale (0 points to 10 points), where 0 points equals no pain and 10 points equals the worst pain. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Short Form (36) Health Survey | one year after the procedure | The SF36 values eight parameters: physical function, social function, physical role, emotional role, mental health, vitality, pain and general health. Zero is the worst conceivable health and 100 the best. |
| Knee Society Score (KSS) | one year after the procedure | The KSS consists of two parts. KS measures pain, range of motion, stability and alignment. FS measures the distance able to walk, the difficulty in going up or down stairs and the need for walking aids. The result is rated as excellent (80-100), good (70-79), regular (60-69) and bad (\<60). |
Outcome results
None listed