Our hospital conducts the following clinical studies. This research is based on records of information obtained in normal medical care. In accordance with the Ethical Guidelines for Medical Research Involving Human Subjects (Established on December 22, 2014, partially revised on February 28, 2017), such research is prohibited for each subject patient. Rather than obtaining direct consent from one individual, the information on the research content is made public and the opportunity to refuse participation is guaranteed. If you have any questions about this research, or if you do not agree that your medical information will be used, please contact us at the contact information below. Even if you refuse to use it, you will not suffer any disadvantages.

1. Research subject name

Results of Arthroscopic Surgery for Single PLC (Posterolateral Corner) Injury in Athletes

2. Research period

March 2020 to February 28, 2023

3. research Institute

University of Occupational and Environmental Health Wakamatsu Hospital

4. Implementation manager

Muneshi Uchida, Associate Professor, Department of Orthopedic Surgery, Wakamatsu Hospital, University of Occupational and Environmental Health

5. Purpose and significance of research

The posterolateral corner (PLC) of the knee joint consists mainly of the lateral collateral ligament (FCL), popliteus tendon (PLT), and popliteofibular ligament (PFL). It is a supporting tissue that is involved in the stability of the knee joint varus and external rotation. Most PLC injuries occur in conjunction with anterior cruciate ligament (ACL) or posterior cruciate ligament (PCL) injuries, and although PLC injuries alone are relatively rare, they are becoming increasingly recognized pathologies in recent years. is. Injury to the PLC causes posterolateral rotatory instability (PLRI) of the knee, resulting in functional instability such as posterior subluxation of the knee joint and posterior rotation of the lateral tibial plateau. Various surgical methods have been reported for surgical methods for PLC injuries, but the current situation is that no surgical method that can be called the gold standard has been established. Most of the surgical procedures reported in the past are primary repair of damaged ligaments by surgery to open the wound wide, or reconstruction using a part of the tendon of one's own body (called autogenous tendon), both of which are successful. Although good postoperative results have been reported, in both cases, the invasiveness of the soft tissue is significant, and since it is necessary to harvest the autologous tendon for reconstruction, it must be said that the surgery is highly invasive.

Recently, we stabilized the PLC by fixing the posterolateral joint capsule together with the lateral meniscus to the lateral margin of the tibia using an arthroscope, a thin tube with a camera and a light at the tip. We developed a technique and submitted it to an English journal (Arthroscopy Techniques, Vol 6, No 2, 2017: pp e291-e295). It is characterized by being a less invasive procedure because it does not require autologous tendon harvesting and can be performed arthroscopically, but there are no studies on its postoperative results and return to sports.

The purpose of this study was to investigate the postoperative outcomes of arthroscopic post-lateral joint capsule stabilization performed for isolated PLC injuries in athletes.

6. method of research

From August 2013 to August 2016, at the Wakamatsu Hospital of the University of Occupational and Environmental Health, patients who underwent surgery with a diagnosis of isolated PLC injury and were followed up for more than 2 years after surgery were examined from electronic medical records. Observations, imaging findings (plain radiographs, MRI), sports activity, and patient-completed postoperative assessments will be obtained and compared before and after surgery.

7. Handling of personal information

For personal information, the address, name, and date of birth will be deleted from the medical record, and a new code will be added instead. All data obtained in this study will be retained for 5 years after the completion of the study or for 3 years from the date the final publication of the results of the study was reported, after which all data will be destroyed. In that case, under the control of the research implementation manager, it will be disposed of so that it cannot be completely restored. Also, if you withdraw your consent, we will discard the data obtained up to that point in the same manner.

8. Contact information

Muneshi Uchida, Associate Professor, Department of Orthopedic Surgery, Wakamatsu Hospital, University of Occupational and Environmental Health

1-17-1 Hamacho, Wakamatsu-ku, Kitakyushu City, Fukuoka Prefecture Phone number 093-761-0090 (representative)

9. others

There are no direct benefits for participating in the study. Also, there are no new costs or rewards. This study has no conflict of interest and has been approved by the University of Occupational and Environmental Health Conflict of Interest Committee to maintain fairness.