Precision MR® — Clinical Study 1

Introduction

This retrospective clinical study evaluated the outcomes of patients who underwent arthroscopic knee surgery using the Precision MR device for meniscus suturing at the Beneficente Unimar Hospital in Brazil between 2021 and 2022. It assessed the device's safety and effectiveness in treating ACL tears with meniscus injuries and isolated meniscus injuries, focusing on patient-reported knee function, activity levels, and surgeon feedback on usability, performance, and overall satisfaction.

Study Overview

A total of 36 patients with meniscus injuries were treated using the Precision MR device.

Postoperative follow-up was conducted within 3 to 22 months, during which patients completed an online self-evaluation questionnaire. Clinical data were collected from hospital archives and supplemented with an evaluation form completed by the respective orthopedic surgeon

Patient Demographics and Injury Distribution

• Total Patients: 36
• Age (mean): 42 years (range 20–76)

By Injury Type:

• Isolated Meniscus: 14 patients (mean age 54, range 37–76)
• ACL (Anterior Cruciate Ligament): 22 patients (mean age 33, range 20–47)

Sex:

• Male: 27 (68%)
• Isolated Meniscus: 6 (43%)
• ACL: 17 (77%)
• Female: 13 (33%)
• Isolated Meniscus: 8 (57%)
• ACL: 5 (23%)

Injury Side:

• Right: 18 (50%)
• Isolated Meniscus: 8 (57%)
• ACL: 10 (45%)
• Left: 16 (44%)
• Isolated Meniscus: 4 (29%)
• ACL: 12 (55%)
• Both: 2 (6%)
• Isolated Meniscus: 2 (14%)
• ACL: 0

Activity Level

• A significant 64% of ACL patients returned to or exceeded their pre-injury activity level after surgery.
• 43% of the Meniscus Patients maintained or improved their pre-injury activity level.

Clinical Recovery - Lysholm Scale

• ACL patients showed promising recovery, with an average Lysholm score of 75 points, and 41% achieved good to excellent outcomes.
• Meniscus patients also had positive results, with 36% reaching good to excellent levels of knee function.

Overall Knee Function (IKDC Scale)

• ACL patients scored well on the IKDC assessment, with an average of 65 points out of 100, indicating favorable knee function recovery.
• Meniscus Patients scored an average of 43 points out of 100.

Conclusion

The Precision MR device proved to be a safe and effective solution for meniscus repair, with positive post-operative outcomes and a low reoperation rate. ACL-injured patients showed faster recovery and better subjective results than those with isolated meniscus injuries, whose activity levels were influenced by age and post-operative restrictions.

Patients reported good to excellent Lysholm scores, and IKDC scores aligned with long-term ACL studies. While follow-up time and pre-existing injuries are study limitations, ongoing data collection will provide further insights.

These findings support Precision MR as a reliable option for meniscus repair, delivering promising clinical outcomes and high patient satisfaction.

Follow-up at 36 months to evaluate recovery and symptom management:

• Tegner Score Pre-op: 9 Post-op: 9
• Lysholm Score: 94, Good daily function.
• IKDC Score: 76, showing some mild limitations.