Causes of unplanned admission after orthopedic procedures in ambulatory surgery.

Objective: Orthopaedic procedures performed in Day Surgery Units provide important advantages which disappear when patients require admission when postoperative recovery is not as expected. The aim of this study was to analyse the reasons for unplanned hospital admissions after orthopaedic procedures in a Day Surgery Unit and their relationship between variables such as patient age, anaesthetic risk and technique, procedure or duration.

Methods: Ambispective cohort study of 5,085 patients who underwent surgical orthopaedic procedures between 1995 and 2017.

Revision total knee arthroplasty: hybrid vs standard cemented fixation.

Introduction: Modular systems with stems are necessary for the stability of revision total knee arthroplasty (rTKA), but controversy remains as to the best fixation method: cemented or hybrid (noncemented stem). The aim of this study was to assess the clinical, X-ray, life-quality and survival results obtained with each fixation method.

Materials And Methods: During the period 2000-2013, rTKA was performed on 67 patients (29 cemented arthroplasty and 38 hybrid fixation).

Burch-Schneider ring associated with morselized bone allografts, survival and clinical outcomes after acetabular revision surgery.

Introduction And Objectives: Acetabular revision surgery is a challenge due to the appearance of bone defects that make primary fixation of implants difficult when extracting loosened components. Reinforcement rings, such as Burch-Schneider (BS), have been shown to be allies in moderate or severe bone defects. The objective of the study is to evaluate the results and survival of these types of implants in acetabular revision surgery in the medium follow-up.

[The importance of the restoration of the joint line in revision total knee arthroplasty. Clinical indexes, quality of life and survival].

Introduction: The reproduction of the anatomical joint line could be a good index to obtain good results in knee prosthesis surgery, although in revision surgery has not been enough studied. A search for a simple and reproducible method is needed to review these results.

Material And Methods: A retrospective study was conducted between January 2000 and December 2013.

Instability of total hip replacement: A clinical study and determination of its risk factors.

Objectives: To determine the risk factors associated with prosthetic dislocation and simulate a finite element model to determine the safe range of movement of various inclination and anteversion cup positions.

Material And Methods: Retrospective Case Control study with 46 dislocated patients from 1994 to 2011.

Control Group: 83 randomly selected patients.

Biomechanical study of the tibia in knee replacement revision.

The best management of severe bone defects following total knee replacement is still controversial. Metal augments, tantalum cones and porous tibial sleeves could help the surgeon to manage any type of bone loss, providing a stable and durable knee joint reconstruction. Five different types of prostheses have been analysed: one prosthesis with straight stem; two prostheses with offset stem, with and without supplement, and two prostheses with sleeves, with and without stem.

[Cost-effectiveness of a hallux valgus day-surgery program].

Introduction: The development of one-day surgery units has shown to be a better use of health resources without reducing quality. The objective of this study was to evaluate the effectiveness and quality criteria of ambulatory surgery program in the Hallux valgus process.

Material And Methods: A retrospective study was conducted on a sample of 753 patients who underwent a Hallux valgus process at our institution between 2002 and 2012 (292 in ambulatory surgery cohort and 461 in hospitalization group).

[Preoperative intravenous iron as a strategy for blood saving in surgery for hip fracture].

Background And Objective: To determine whether administration of intravenous iron in a patient diagnosed with hip fracture reduces the need for blood transfusion.

Patients And Methods: A retrospective observational case-control study was performed comparing a control group of 63 patients diagnosed with hip fracture with another group of 57 patients treated with parenteral iron. Demographic, clinical condition/clinical record and hematometric differences of the case-control patients were described.

A finite element analysis of the vibration behaviour of a cementless hip system.

An early diagnosis of aseptic loosening of a total hip replacement (THR) by plain radiography, scintigraphy or arthography has been shown to be less reliable than using a vibration technique. However, it has been suggested that it may be possible to distinguish between a secure and a loose prosthesis using a vibration technique. In fact, vibration analysis methods have been successfully used to assess dental implant stability, to monitor fracture healing and to measure bone mechanical properties.

Navigation in total knee arthroplasty. A multicenter study.

We carried out a multicentre study to compare the postoperative femorotibial radiographic axis in two total knee replacement groups; one using manual instrumentation and the other using navigation. In the latter group, three navigation systems were used: Stryker, Orthopilot and Navitrack. The prior circumstances of patients in terms of age, weight, aetiology, epicondylar perimeter, patellar tendon length and knee deformity was similar in both groups.