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【Classic Case Analysis】 LDK Ortho XU Unicompartmental Knee Arthroplasty
Created on 2025.11.19, Updated on 03.25, Published on 03.25
With You, Every Step Of The Way ——
Recently, Tangshan People's Hospital admitted a patient with knee pain. The patient had experienced bilateral knee pain without any obvious cause six years prior, making movement difficult. He had previously received acupuncture treatment at a local clinic with limited success. He then consulted at Tangshan Second Hospital, where examinations and X-rays led to a diagnosis of bilateral knee arthritis, and he was advised to undergo joint replacement surgery (specific treatment details unknown). Recently, the pain in his left knee worsened, prompting him to seek further treatment at Tangshan People's Hospital. After examination and review of X-rays at the outpatient clinic, he was admitted with a preliminary diagnosis of "primary bilateral knee arthritis." Following a consultation with Director Sun Hongfei, the patient's family was informed... The patient was diagnosed with left knee osteoarthritis requiring surgery, and both the patient and family consented. Based on the results of auxiliary examinations, Director Sun Hongfei determined the patient had primary bilateral knee osteoarthritis and required unicompartmental knee arthroplasty. After completing relevant examinations and consultations with related departments, Director Sun Hongfei, drawing upon her extensive clinical experience and professional knowledge, led her team to successfully perform the unicompartmental knee arthroplasty using the Lidakang XU unicompartmental knee prosthesis, combined with superior surgical techniques and close teamwork. The surgery proceeded smoothly, successfully relieving the patient's pain.
Description of the condition
The patient is a 56-year-old female.
Chief complaint
I have had pain in both knees for six years and have been unable to move them. Recently, the pain in my left knee has worsened.
Present Illness
The patient developed bilateral knee pain six years ago without any obvious cause, making it difficult for him to move. He had previously received acupuncture and other treatments at a local health center, but the effects were unsatisfactory. On August 19, 2022, he visited the Second Hospital of Tangshan City. After examination and X-rays, he was diagnosed with bilateral knee osteoarthritis and was advised to undergo joint replacement surgery (specific treatment details unknown). Recently, the pain in his left knee has worsened, and for further diagnosis and treatment, he visited our hospital today. After examination and review of X-rays, he was admitted to the hospital with the same diagnosis.
Since the onset of the illness, the patient has been in good spirits, sleeping well, with a normal appetite, normal bowel movements, and no change in weight.
Specialist examination
There were no obvious deformities in either knee joint, and no obvious redness, swelling, or ulceration of the local skin. Both knee joints exhibited clicking sounds but no locking. The patellar tap test, patellar compression test, and patellar grinding test were positive, while the medial and lateral stress tests were negative. There was tenderness in the medial joint space and no tenderness in the lateral joint space. The Lachman test was negative. Left knee extension was approximately 20°, and knee flexion was approximately 100°; right knee extension was approximately 10°, and knee flexion was approximately 100°. Both hip and ankle joints had normal range of motion. Local skin temperature and sensation were normal, with good dorsalis pedis pulse and peripheral circulation.
Auxiliary examination: DR (Tangshan Second Hospital, 2022-8-19): Osteophytes in both knee joints, narrowing of the medial joint space.
Preliminary diagnosis:
1. Primary bilateral knee joint disease
2. Hypertension
Disease introduction
Unicompartmental Knee Arthroplasty (UKA) is a minimally invasive surgery that only replaces a single damaged joint cavity on the medial or lateral side of the knee joint.
Disease Definitions and Symptoms
The main indication for Unicompartmental Knee Arthroplasty (UKA) is end-stage arthritis localized to one compartment.
Common Symptoms and Signs
- Localized Pain: Pain and tenderness are concentrated on a single joint line on the medial or lateral side. Surgeons often use the "one-finger test" before surgery to confirm whether pain is accurately localized to a single joint cavity.
- Knee deformity : medial OA is usually accompanied by varus deformity ; lateral OA is accompanied by valgus deformity .
- Functional Disability: Affects activities such as walking, squatting, or climbing stairs.
- Limited range of motion: There may be flexion contracture or insufficient range of motion before surgery.
Preoperative images
Intraoperative imaging
Postoperative imaging
Products used during surgery
LDK Ortho Unicompartmental Knee System
CE Certified
Product advantages:
- Multi-radius curve of the femoral condyle provides patients with a better fit;
- Extended posterior condyle safely accommodates high flexion;
- Inward arc design avoids prepatellar pain;
- Low-constrained articular surface less restricts knee motion, allowing freer knee motion;
Unicompartmental knee replacement is less invasive and can preserve the normal structure of the knee joint.
Beijing LDK Ortho Technology Co., Ltd. ——
💡
Founded in 1998, Beijing LDK Ortho Technology Co., Ltd., adhering to the principle of "Dedication to High Technology, Benefiting the People," has, after 26 years of innovative development, become a national high-tech enterprise specializing in medical devices, integrating R&D, production, sales, and service, with surgical implants as its main business. It is a leading enterprise in the domestic artificial joint field and an outstanding national brand. The company has successively won awards such as the National Torch Program and the National Innovation Fund, and has been included in the National 13th Five-Year Plan for Key Scientific Research.
The company currently produces and sells over 50,000 artificial joints, and its revenue is projected to exceed 1 billion yuan in the next three years. It strives to become an A-share listed company specializing in artificial joints. In the future, the company will build an integrated technological innovation consortium encompassing production, education, research, and medicine in the field of orthopedic medical devices in Shunyi Airport Area C, making new and greater contributions to the development of orthopedic medical devices in China.
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Jason Jin