RF TKA Prehabilitation

Radiofrequency Facilitates the Prehabilitation Process in Patients Undergoing Total Knee Arthroplasty: Effects on Preoperative and Postoperative Functional Capacity. A Double Blind Randomized Controlled Trial

The purpose of this study is to compare the effects of the radiofrequency applied to the sensory innervation of the knee, with respect to a control group (standard therapy), in a prehabilitation program aiming to improve the functional recovery of patients undergoing TKA.

In the present study, the investigators hypothesize that participants treated with radiofrequency 4-6 weeks before the surgery, should be able to effectively accomplish the prehabilitation program and, therefore, have a faster recovery of their functional status in the post operative period , compared with the control group (That use the present state of the art approach)

Study Overview

• Status: Unknown
• Conditions: Knee Osteoarthritis
• Intervention / Treatment: Other: Radiofrequency

Detailed Description

Postoperative functional capacity following TKA surgery has been strongly associated with preoperative functional status. Presence of pain, poor strength and flexibility, and limited ability to complete physiological tasks have been shown to be consistent predictors of poor recovery from knee surgery.

The postoperative period is associated with 30-40% decrease in functional capacity, and efforts have been made to facilitate the recovery by implementing rehabilitative measures over the period of weeks and months. However, the postoperative period might not be the best time to engage patients in intensive physiotherapy as they are easily tired and in pain. Preparing patients for the stress of surgery, called also prehabilitation, is emerging as a mean to optimize pre-operative status and increase functional reserve thus, increasing surgical stress tolerance. Observational and randomized controlled studies in patients scheduled for colorectal, thoracic, and spinal surgeries have suggested that a 4-6 weeks of moderate preoperative physical activity can lead to significant postoperative improvements in cardiorespiratory reserve and functional capacity. However, preliminary trials on the effect of a 6-8 weeks prehabilitation program with structured exercises prior to knee arthroplasty have reported contrasting results, and one of the reasons might be the high levels of pain encountered by these patients while exercising, therefore making it difficult to engage them in achieving effective prehabilitation. It would therefore, make sense if efforts were directed towards relieving pain thus, facilitating broader fitness enhancement strategies and improving the surgical experience and the recovery process.

Common pharmacological methods to relieve osteoarthritic pain while waiting for surgery, include acetaminophen, non-steroidal anti-inflammatory drugs (NSAIDS and Cox-2 inhibitors) and occasionally opioids. Non-surgical interventions, such as intra-articular injection with steroids or hyaluronic acids, acupuncture and periosteal stimulation therapy, are often used as complementary therapies of limited benefit. The use of pulsed and Continuous radiofrequency (PRF and CRF) to the saphenous nerve and the genicular nerves branches of the knee, have been shown to decrease significantly pain scores in 44% of patients with chronic OA of the knee for up to one year after the treatment. Akbasa et al. using the Western Ontario and McMaster Osteoarthritis Index (WOMAC), reported significant reduction of pain at rest, movement and flexion of the knee and increase in patient's satisfaction 6 months after the PRF treatment. Our group has recently demonstrated the benefits of radiofrequency treatment in patients waiting for total knee replacement TKA 9. More so, the investigators recent results reported to the American Society of Regional Anesthesia and Pain, showed in a randomized controlled trial promising results in terms of faster recovery of patients undergoing TKA, when they received RF instead of the standard postoperative analgesia technique 10.

The present study is, as mentioned above, related to an already approved and finished study in this institution: 15-209-MUHC "Functional outcome and postoperative analgesia following total knee arthroplasty: a prospective, randomized, double blind comparison between continuous adductor canal block and pulsed radiofrequency of saphenous and genicular nerves of the knee". In that study, our research group was investigating the effects of the Radiofrequency treatment preoperatively on the postoperative pain and functional recovery, in patients who did not participate in a prehabilitation program.

• Study Type: Interventional
• Enrollment (Anticipated): 48
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Canada
  • Quebec
    • Montreal, Quebec, Canada, H3A 1A1
      • Recruiting
      • Montreal General Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 40 years to 80 years (ADULT, OLDER_ADULT)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Chronic knee pain, with Dynamic VAS ≥ 5
• Scheduled for elective total knee arthroplasty
• Functional impairment due to pain because of knee osteoarthritis
• Taking medications to control the pain.
• Ability to perform the 6 MWT.

Exclusion Criteria:

• ASA physical status > 3
• Morbid obesity (BMI >40)
• Revision of total knee arthroplasty
• Mayor neuropsychiatric disease
• Mayor cardiac, renal or hepatic failure
• Anemia (hematocrit <30%)
• Immunosuppression
• Rheumatoid arthritis
• Allergy to opioids, to local anesthetics or other medications used in the study,
• Chronic regular use of large doses of opioids (>20mg equivalent of morphine/day) or sedatives
• Unwillingness to have spinal anesthesia
• History of recent drug abuse
• Contraindication to receive regional anesthesia (e.g. coagulation defect)
• Inability to walk before the surgery
• Inability to perform physical tasks
• Contraindications to physical exercise and training
• Prior mayor knee surgery
• Connective tissue diseases affecting the knee
• Serious neurologic disorders
• Injection with steroids or hyaluronic acids during the previous 3 months
• Active sciatic pain
• Anticoagulant medications

Study Plan

How is the study designed?

Design Details

• Primary Purpose: PREVENTION
• Allocation: RANDOMIZED
• Interventional Model: PARALLEL
• Masking: DOUBLE

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
EXPERIMENTAL: Radiofrequency group; In this group patients will receive in a sterile fashion continuous radiofrequency for 4 minutes to the 3 genicular nerves in the operative knee as well as Pulsed Radiofrequency at 42 degrees celsius, for 4 minutes (60-70 volts) to the saphenous nerve and the nerve to the Vastus Medialis, at the level of the adductor canal. The procedure is done under local anesthesia on an ambulatory basis. After the radiofrequency, Ropivacaine 0.5% 5 ml is injected to each one of the nerves, along with 5 milligrams of Methylprednisolone to each nerve. Once the procedure is completed (takes about 20 minutes), patients will be observed in the preoperative program facility for 30 minutes and then discharged home.	Other: Radiofrequency; See previous page
SHAM_COMPARATOR: Control (Sham Radiofrequency) group; In this group patients will receive injections of the local anesthetic and steroids in the same anatomical locations, without activating the radiofrequency generator.	Other: Radiofrequency; See previous page

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
change of 15% of the total distance walked during a 6MWT	change of 15% or more in total distance in six minute walk test from baseline	18 weeks

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change in WOMAC score	Change in score of WOMAC questionnaire	Baseline and 18 weeks
Change in knee pain levels assessed by VAS (Dynamic/Static)		Baseline and 18 weeks
Change in amount of daily pain relief medication consumption		Baseline and 18 weeks
Change in total time of the time up and go (TUG) test		Baseline and 18 weeks

Collaborators and Investigators

• Sponsor: McGill University Health Centre/Research Institute of the McGill University Health Centre

Study record dates

Study Major Dates

• Study Start (ACTUAL): December 1, 2017
• Primary Completion (ANTICIPATED): December 31, 2018
• Study Completion (ANTICIPATED): December 31, 2018

Study Registration Dates

• First Submitted: August 20, 2018
• First Submitted That Met QC Criteria: November 28, 2018
• First Posted (ACTUAL): November 29, 2018

Study Record Updates

• Last Update Posted (ACTUAL): November 29, 2018
• Last Update Submitted That Met QC Criteria: November 28, 2018
• Last Verified: August 1, 2018

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Joint Diseases; Musculoskeletal Diseases; Rheumatic Diseases; Arthritis; Osteoarthritis; Osteoarthritis, Knee
• Other Study ID Numbers: 2018-3664

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No