Genicular Artery Embolization as Pain Treatment of Knee Osteoarthritis

Not Applicable

Completed

• Conditions: Knee Osteoarthritis
• Interventions: Procedure: Transarterial geniculate artery embolization

• Registration Number: NCT05360329
• Lead Sponsor: Rigshospitalet, Denmark

Brief Summary

The aim of this study is to investigate the safety and efficacy of geniculate artery embolization (GAE) as pain treatment in patients with mild to moderate knee osteoarthritis.

Detailed Description

This is a single arm, prospective, pilot study investigating the safety and efficacy of GAE as pain treatment in patients with mild to moderate knee osteoarthritis. Patient related outcome measurements (PROMs), physical tests and several image modalities will be conducted.

It may form the grounding for further research in the shape of a larger randomized clinical trial.

The hypothesis is, that GAE will reduce synovitis and thereby pain in the patient group. This may secondary improve physical function and reduce consumption of analgesics.

Study Timeline

• Study First Submitted: 2022-04-25
• Study First Submitted QC: 2022-04-29
• Study First Posted: 2022-05-04
• Study Start: 2022-09-20
• Primary Completion: 2023-12-19
• Study Completion: 2023-12-19
• Status Verified: 2024-12
• Last Update Submitted: 2024-12-17
• Last Update Posted: 2024-12-20

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 17

Inclusion Criteria

• Body Mass Index < 35 kg / m2.
• X-ray verified mild to moderate KOA (Kellgren Lawrence grade 1-3 [24]), obtained maximum 6 months prior to inclusion.
• Moderate to severe knee pain during walking (Visual Analog Scale (VAS) > 50 mm) - resistant to minimum 3 months physiotherapy.
• Willing, able, and mentally competent to provide informed consent.

Exclusion Criteria

• Local infection in knee or groin areas.
• Moderate to severe pain in ipsilateral lower limb joints; VAS > 2.
• Intermittent claudication.
• Rheumatoid arthritis or seronegative arthropathies.
• Prior ipsilateral open knee surgery.
• Ipsilateral arthroscopy within 6 months.
• Ipsilateral intra-articular knee injection within 6 months.
• Current/recent (within 4 weeks) use of oral corticosteroids.
• Generalized pain syndrome (e.g. fibromyalgia) or nerve root compression syndromes.
• Pregnant or planned pregnancy during the study period.
• Lactation.
• Active malignancy.
• Known history of allergy to contrast media.
• Contra-indications for MRI (e.g. metallic foreign bodies, etc).
• Manifest hyperthyroidism.
• Diabetes (I+II).
• Liver disease.
• Only one kidney, former kidney surgery, reduced kidney function or failure (chronic or acute).
• Estimated glomerular filtration rate < 60 ml / min / 1.73 m2 (All participants: blood sample maximum 30 days prior to GAE. Participants > 60 years: another blood sample maximum 3 months prior to last MRI scan with contrast agents).
• INR > 1.4, Platelets ≤ 40 x 109 / l (All participants: blood sample maximum 30 days prior to GAE).
• Antithrombotic treatment except acetylsalicylic acid.
• Diseases affecting the bone metabolism (E.g. severe osteoporosis, Paget's disease, or hyperparathyroidism).
• American Society of Anesthesiologists classification > 3.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Mild to moderate knee osteoarthritis (Kellgren Lawrence Score 1-3)	Transarterial geniculate artery embolization	Geniculate artery embolization will be performed in all eligible participants.

Primary Outcome Measures

Name	Time	Method
Changes in Visual Analog Scale (VAS) as a measure of efficacy	6 months post GAE	Reported as worst pain experienced during walking in the last 24 hours on a 100 mm scale from "No pain" to "Pain as bad as it could possibly be".

Secondary Outcome Measures

Name	Time	Method
Dexa scan	Baseline vs 6 months post GAE	Changes in bone mineral density
Changes in Visual Analog Scale (VAS) as a measure of efficacy	1 week, 1, 2, 3, 4, and 5 months post GAE	Reported as worst pain experienced during walking in the last 24 hours on a 100 mm scale from "No pain" to "Pain as bad as it could possibly be".
Changes in Knee injury and Osteoarthritis Outcome Score (KOOS)	Baseline vs. 1 week, 1, 2, 3, 4, 5, and 6 months post GAE.	KOOS assesses patient pain (9 items), other symptoms (7 items), function in daily living (17 items), function in sport and recreation (5 items), and knee related quality of life (4 items). Scores range from 0 to 100 with a score of 0 indicating the worst possible knee symptoms and 100 indicating no knee symptoms.
Subjective response to the treatment on a five point Likert scale	6 months post GAE	(none=no good at all, ineffective treatment; poor=some effect but unsatisfactory; fair=reasonable effect but could be better; good=satisfactory effect with occasional episodes of pain or stiffness; excellent=ideal response, virtually pain free)
MRI	Baseline vs. 1 and 6 months post GAE	Changes in synovial thickness (CE-MRI), effusion (Non CE-MRI) and synovial perfusion (DCE-MRI).
Ultrasound	Baseline vs. 1 and 6 months post GAE	Changes in synovial thickness, effusion and perfusion (doppler).
Changes in IPAQ (international physical activity questionnaire)	Baseline vs. 1 week, 1, 2, 3, 4, 5, and 6 months post GAE	Questionnaire on daily physical activity
Changes in use of analgesics	Baseline vs. 1 week, 1, 2, 3, 4, 5, and 6 months post GAE	(paracetamol, NSAID, opioid, or neuropathic agent)
Changes in 30 seconds Chair Stand Test	Baseline vs. 1 and 6 months post GAE.	The maximum number of chair stand repetitions in a 30 second period.
Changes in Stair Climb Test	Baseline vs. 1 and 6 months post GAE.	The time (in seconds) it takes to ascend and descend a flight of stairs.
Changes in 40 meters Fast Paced Walk Test	Baseline vs. 1 and 6 months post GAE.	A fast-paced walking test that is timed over 4\*10 meters for a total of 40 meters.

Trial Locations

Locations (1)

Copenhagen University Hospital, Rigshospitalet; 🇩🇰 Copenhagen, Denmark