ObjectiveTo observe the effect of ultra early joint movement onthe rehabilitation of shoulder joint function in patients with breast cancer who underwent axillary lymph node dissection (ALND).MethodsA total of 100 patients with breast cancer who underwent ALND between August 2018 and December 2019 in Zhongnan Hospital of Wuhan University were randomly divided into the early movement group (n=50) and the ultra early movement group (n=50). Both groups received early rehabilitation intervention as recommended by the guidelines. Patients in the early movement group started the shoulder joint movement training on the 7th day after surgery, and patients in the ultra early movement group started the shoulder joint movement training on the 3rd day after surgery, 3 times a day, 5 days a week, for 4 weeks. The changes in pain and drainage volume 3 days, 1 week, and 2 weeks after surgery and the changes of shoulder joint range of motion 1 week, 2 weeks , and 3 weeks after surgery were compared between the two groups, changes in shoulder function and quality of life 1 week and 3, 6, and 12 weeks after surgery were compared by the Constant-Murley and the Medical Outcomes Study 36-item Short-form Health Survey (SF-36) scales, respectively.ResultsThree days, 1 week, and 2 weeks after surgery, no significant difference in the pain scores or drainage volumes was observed between the two groups (P>0.05). One week, 2 weeks, and 3 weeks after operation, the motion ranges of shoulder abduction, flexion, and external rotation in the ultra early movement group were significantly better than those in the early movement group (P<0.05), and the motion range of shoulder internal rotation 1 week after operation in the ultra early movement group was significantly better than that in the early movement group (P<0.05). One week and 3, 6, and 12 weeks after operation, the Constant-Murley scores in the ultra early movement group were 25.9±4.3, 55.4±5.3, 64.6±4.5, and 73.3±4.6, respectively, which were better than those in the early movement group (21.3±3.8, 48.9±7.8, 57.3±4.7, and 70.7±3.0, respectively; P<0.05). No significant difference in the SF-36 scale scores was observed between the two groups (P>0.05).ConclusionsUltra early joint movement can significantly improve the motion range and functions of shoulder joint in patients with breast cancer who underwent ALND. What’s more, ultra early joint movement does not increase the early drainage volume or pain, and has no significant impact on the later quality of life. It is worthy of clinical application.
The surgical installation accuracy of the components in unicompartmental knee arthroplasty (UKA) is an important factor affecting the joint function and the implant life. Taking the ratio of the medial-lateral position of the femoral component relative to the tibial insert (a/A) as a parameter, and considering nine installation conditions of the femoral component, this study established the musculoskeletal multibody dynamics models of UKA to simulate the patients’ walking gait, and investigated the influences of the medial-lateral installation positions of the femoral component in UKA on the contact force, joint motion and ligament force of the knee joint. The results showed that, with the increase of a/A ratio, the medial contact force of the UKA implant was decreased and the lateral contact force of the cartilage was increased; the varus rotation, external rotation and posterior translation of the knee joint were increased; and the anterior cruciate ligament force, posterior cruciate ligament force and medial collateral ligament force were decreased. The medial-lateral installation positions of the femoral component in UKA had little effect on knee flexion-extension movement and lateral collateral ligament force. When the a/A ratio was less than or equalled to 0.375, the femoral component collided with the tibia. In order to prevent the overload on the medial implant and lateral cartilage, the excessive ligament force, and the collision between the femoral component and the tibia, it is suggested that the a/A ratio should be controlled within the range of 0.427−0.688 when the femoral component is installed in UKA. This study provides a reference for the accurate installation of the femoral component in UKA.