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Updated: Sep 29, 2025

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Knee Arthrocentesis in Adults
Published on: February 25, 2022
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GAUCHO - Trial Genicular Artery Embolization Using Imipenem/Cilastatin vs. Microsphere for Knee Osteoarthritis: A
Mateus Picada Correa1,2,3, Joaquim M Motta-Leal-Filho4,5, Ricardo Lugokeski6,7
1Instituto Vascular de Passo Fundo (Invasc), R. Capitão Araújo 297/1207, Passo Fundo, RS, 99010-200, Brazil. drmateus@invascrs.org.
Cardiovascular and Interventional Radiology
|March 19, 2022
Summary
Genicular artery embolization (GAE) using imipenem/cilastatin or microspheres shows comparable safety and efficacy for knee osteoarthritis pain. This randomized trial provides insights into GAE
Area of Science:
- Interventional Radiology
- Orthopedics
- Pain Management
Background:
- Knee osteoarthritis (OA) causes significant pain and reduced quality of life.
- Conservative treatments often fail for moderate-to-severe knee OA pain.
- Genicular artery embolization (GAE) is an emerging treatment option for refractory knee OA.
Purpose of the Study:
- To compare the safety and efficacy of GAE using imipenem/cilastatin versus microspheres for knee OA.
- To evaluate clinical and radiological outcomes following GAE in patients with knee OA.
Main Methods:
- Single-center, double-blind, randomized controlled trial.
- GAE performed using either imipenem/cilastatin or microspheres.
- Primary outcomes: clinical success (pain reduction via WOMAC/KOOS) at 3 months.
- Secondary outcomes: radiological success (MR imaging) and reduced analgesic use at 12 months.
Main Results:
- The study protocol outlines the methodology for comparing two embolization agents.
- Hypothesis: no significant difference in safety and efficacy between imipenem/cilastatin and microspheres.
- Detailed clinical and radiological assessments planned at multiple follow-up points.
Conclusions:
- This trial will provide crucial data on the comparative effectiveness of different GAE agents for knee OA.
- Findings will inform clinical practice regarding GAE for managing knee osteoarthritis pain.
- The study aims to establish GAE as a safe and effective treatment option.

