[One-stage bilateral hip arthroplasty].

Introduction: The unilateral total hip arthroplasty is a routine surgical intervention, but in the mean time in several institutions over the world, they perform also bilateral total hip arthroplasty as a one-stage surgery, with different indications. Objective: The aim of this study is to present through our cases and through the international literature the indication criteria, the absolute and relative contraindications, and the potential difficulties of one-stage bilateral hip arthroplasty, showing also the real state of this intervention in our healthcare and financial situation. Method: In this publication, we review - in relation to our five cases - the possibilities of bilateral total hip arthroplasty, their indications and differences compared to the unilateral intervention, and also its financial background.

Activated polymorphonuclear derived extracellular vesicles are potential biomarkers of periprosthetic joint infection.

Background: Extracellular vesicles (EVs) are considered as crucial players in a wide variety of biological processes. Although their importance in joint diseases or infections has been shown by numerous studies, much less is known about their function in periprosthetic joint infection (PJI). Our aim was to investigate activated polymorphonuclear (PMN)-derived synovial EVs in patients with PJI.

[Our initial experiences with MR arthrography].

Introduction: The gold standard method for shoulder surgery imaging is magnetic resonance imaging (MRI). The sensitivity of the conventional MRI for full thickness tears is way above 85%, for partial rotator cuff lesions this number is less than 40%. Diagnostic accuracy is equally low in detecting different variations of anterior labrum lesion and also in injury of the glenohumeral ligaments.

[Effect of the surgical exposure on the early postoperative period after total knee arthroplasty].

Introduction: Total knee arthroplasty has become one of the most successful and safest surgical procedures in orthopedic surgery. Of the many different types of surgical exposure, the most common, so-called medial parapatellar (MP) incision is the cut of the quadriceps tendon, which impairs extensor function. In contrast, subvastus (S) exposure, which spares the extensor apparatus, may promise better healing.

[Prevalence of blood transfusion after primary total hip arthroplasty].

Total hip arthroplasty is one of the most common surgical procedures that requires blood transfusion, with the possible risk of significant complications. A retrospective study was performed to analyze the predictors of blood transfusion after primary total hip arthroplasty. We collected the data of 210 consecutive patients undergoing total hip arthroplasty.

[The role of multimodal postoperative analgesia after primary hip arthroplasty].

Due to the increasing number of arthroplasties, the number of post-operative hospital days was reduced and the rate of rehabilitation accelerated. For this, proper postoperative analgesia is essential and the multimodal pain relief is an excellent tool. The aim of our study was to compare postoperative functional results, postoperative pain levels, and opioid analgesic needs of patients who received conventional and novel analgesic treatments.

[The change of fatty degeneration in the rotator cuff muscles after repair in patients over 65].

Introduction: In the case of rotator cuff tears, the severity of the muscle atrophy and fatty degeneration has an effect on the success of the repair and on the functional outcome after surgery.

Aim: The ability of regeneration reduces with ageing; therefore, the study examined the atrophy and the fatty degeneration after rotator cuff repair in patients over 65.

Method: Eleven patients over 65 years of age were involved whose surgery was performed at the Department of Orthopaedics of Semmelweis University between 2012 and 2015.

[Comparative functional outcome of reverse shoulder prostheses implanted on degenerative and oncological indications].

Introduction: Several methods (bone graft, endoprosthesis) are used to reconstruct proximal humerus resections due to primary and metastatic tumours. One of the new procedures is the replacement of the joint surfaces and the removed proximal humerus end with reverse shoulder prosthesis, optionally supplemented with bone implantation (composite procedure) in the hope of achieving better shoulder function.

Aim: The aim of this study was to compare the shoulder function of the patient group operated by the above procedure with reverse prosthesis to a patient group operated by indication of degenerative shoulder disease (rotator cuff arthropathy).