Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA
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Knee Surg Sports Traumatol Arthrosc · Aug 2014
UKA closely preserves natural knee kinematics in vitro.
It is assumed that unicondylar knee arthroplasty (UKA) features kinematics close to the natural knee. Clinical studies have also shown functional benefits for UKA. There is to date only little biomechanical data to support or explain these findings. The purpose of this study was to investigate whether UKA is able to preserve natural knee kinematics or not. ⋯ As ligaments, lateral compartment and patellofemoral anatomy are preserved with UKA; the unloaded knee closely resembles native kinematics. The slight kinematic changes that were found under load are probably due to loss of the conforming medial meniscus and to the mismatch in geometry and stiffness introduced by UKA. These patterns resemble those found in knees with significant loss of function of the medial meniscus.
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Knee Surg Sports Traumatol Arthrosc · Aug 2014
Randomized Controlled TrialClinical value of tranexamic acid in unilateral and simultaneous bilateral TKAs under a contemporary blood-saving protocol: a randomized controlled trial.
Despite the documented blood-saving effects of tranexamic acid (TNA) in total knee arthroplasty (TKA), the question whether clinical values of TNA are identical in unilateral and bilateral TKAs remains unclear. This study was undertaken to determine the clinical values of TNA in unilateral and simultaneous bilateral TKAs under a contemporary blood-saving protocol in terms of efficacy (total blood loss and transfusion rate) and safety (the incidences of symptomatic deep vein thrombosis and pulmonary embolism). ⋯ This study demonstrates that the use of TNA reduces total blood loss, but the effects on the transfusion rate can differ depending on the type of TKAs (unilateral vs. bilateral) and the blood-saving protocols.
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Knee Surg Sports Traumatol Arthrosc · Aug 2014
Review Meta AnalysisPeriarticular multimodal drug injection in total knee arthroplasty.
A systematic review and meta-analysis based on randomized controlled trials (RCTs) were conducted to evaluate the efficiency and safety of periarticular multimodal drug injection in total knee arthroplasty (TKA). ⋯ The current evidence suggests that periarticular multimodal drug injection in TKA provides short-term advantages in pain relief, straight leg raise and postoperative complications.
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Knee Surg Sports Traumatol Arthrosc · Aug 2014
Randomized Controlled Trial Comparative StudyBetter quadriceps recovery after minimally invasive total knee arthroplasty.
The proponents of minimally invasive total knee arthroplasty (TKA) have reported better functional recovery than conventional TKA. In most of the previous studies, the results were shown with the relatively subjective methods. We investigated the objective results with a dynamometry in this prospective randomized study. It was hypothesized that minimally invasive TKA would have a better and earlier recovery of quadriceps force in terms of the objective numeric data. ⋯ Minimally invasive TKA has benefit in quadriceps recovery at earlier rehabilitation period although catch-up recovery in conventional TKA was accelerated from the postoperative 6 weeks to 3 months. It may support the concept of early return to full activity after minimally invasive TKA, and patients might get back early to normal life.
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Knee Surg Sports Traumatol Arthrosc · Aug 2014
ReviewPain after knee arthroplasty: an unresolved issue.
Despite the recent advances in the understanding of pain mechanisms and the introduction of new drugs and new techniques in the postoperative management, pain after total knee arthroplasty (TKA) is still an unresolved issue. It affects the quality of life and rehabilitation of an important percentage of patients undergoing TKA. The aim of this narrative review was to give an overview on pain mechanisms and multimodal pain management. ⋯ This narrative review offers a clear overview of pain mechanism after knee arthroplasty and an understanding on how multimodal pain management can reduce the intensity and duration of pain after knee arthroplasty.