Notes

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This study evaluated whether the type of anesthesia independently related to risk of blood transfusion events in patients undergoing total knee arthroplasty (TKA) after adjusting for other covariates. CDDP This was a secondary analysis of a retrospective cohort study of patients undergoing primary unilateral TKA in Singapore. The independent variable was the type of anesthesia and the dependent variable was blood transfusion events. A multivariable logistic regression analysis was performed adjusting for variables that might affect the choice of anesthesia or blood transfusion events. Additional analyses examined this association by the subgroup analysis by using stratified multivariate logistic regression models. Of all 2,366 patients undergoing primary unilateral TKA, 120 (5.1%) developed blood transfusion events. Sixty-four (4.1%) of 1,560 patients with regional anesthesia (RA) developed blood transfusion events, compared with 56 (6.9%) of 806 patients with general anesthesia (GA; (p = 0.003). After adjusting for age, sex, preoperative hemoglobin, and other variables, patients who received RA had a decreased risk of blood transfusion events compared with those receiving GA (odds ratio [OR] 0.53, 95% confidence interval [CI] 0.35-0.81). This risk further decreased in male (OR 0.20, 95% CI 0.07-0.59) and participants whose operation time ≥ 90 minutes (OR 0.39, 95% CI 0.19-0.78). Our results indicated that patients receiving primary unilateral TKA who were managed with RA had a significantly decreased risk of blood transfusion events compared with those with GA, especially in male and participants whose operation time ≥ 90 minutes. Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.Atopic dermatitis (AD), sometimes referred to as eczema, is a common skin disease, and skin barrier dysfunction and immunological disorders are well recognized. However, surgical wound complications after orthopaedic surgery in patients with AD have not been described. This study aimed to report four patients with AD who developed foreign body reactions to FiberWire sutures with or without surgical wound infection (SSI) after knee cruciate ligament reconstruction (CLR). The mean age was 19.8 (range, 16-25) years, and patients 1 and 3 underwent reconstructions of the posterior and anterior cruciate ligament, respectively. At a mean of 7.5 (range, 4-10) weeks postoperatively, discharge from the surgical wound at the tibial side of the fixed graft was identified. All patients were treated with continuous saline lavage and antibiotics; however, their wounds did not heal. Second-look arthroscopy and hardware removal were performed at a mean 12.2 (range, 9-15) months postoperatively. Proliferated granulation tissue surrounding the FiberWire was identified. Intraoperative wound cultures were negative in three of the four patients. Histological examination of the tissues adjacent to the FiberWire revealed a foreign body reaction. All wounds healed immediately after the second surgery. In addition to SSI, foreign body reactions are more likely to occur in patients with AD than in those without AD. Preoperative management of AD by dermatologists and consideration of appropriate suture materials are mandatory to reduce surgical wound complications after knee CLR in patients with AD. Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.Bone loss often complicates revision total knee arthroplasty (TKA). Management of metaphyseal defects varies, with no clearly superior technique. Two commonly utilized options for metaphyseal defect management include porous-coated metaphyseal sleeves and tantalum cones. A systematic review was conducted according to the international Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. We combined search terms "Total knee arthroplasty" AND/OR "Sleeve," "Cone" as either keywords or medical subject heading (MeSH) terms in multiple databases according to PRISMA recommendations. All retrieved articles were reviewed and assessed using defined inclusion and exclusion criteria. A total of 27 studies (12 sleeves and 15 cones) of revision TKAs were included. In the 12 studies on sleeve implantation in revision TKAs, 1,617 sleeves were implanted in 1,133 revision TKAs in 1,025 patients. The overall rate of reoperation was 110/1,133 (9.7%) and the total rate of aseptic loosening per sleeve was 13/1,617 (0.8%). In the 15 studies on tantalum cone implantation in revision TKAs, 701 cones were implanted into 620 revision TKAs in 612 patients. The overall rate of reoperation was 116/620 (18.7%), and the overall rate of aseptic loosening per cone was 12/701 (1.7%). Rates of aseptic loosening of the two implants were found to be similar, while the rate of reoperation was nearly double in revision TKAs utilizing tantalum cones. Variability in the selected studies and the likely multifactorial nature of failure do not allow for any definitive conclusions to be made. This review elucidates the necessity for additional literature examining revision TKA implants. Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.Recently, a variety of studies have analyzed the potential correlation between lumbar degenerative disease (LDD) and inferior clinical outcomes after total hip arthroplasty. However, there has been limited data concerning the role of LDD as a risk factor for failure after total knee arthroplasty (TKA). link2 The aim of our study was to determine (1) what is the association of LDDs with TKA failure (all-cause revision) within 2 years of index arthroplasty and (2) if patients with LDD and lumbar fusion are at increased risk of TKA revision within 2 years compared with LDD patients without fusion. link3 Data were collected from the Humana insurance database using the PearlDiver database from 2007 to 2017. To assess aim 1, patients were stratified into two groups based on a prior history of LDD (International Classification of Diseases [ICD]-9 or -10 diagnostic codes). To analyze aim 2, patients within the LDD cohort were stratified based on the presence of lumbar fusion (lumbar fusion Current Procedural Terminology code). A7). Based on these findings, TKA candidates with preoperative LDD should be counseled that TKA outcome may be impaired by the coexistence of lumbar spine degenerative disease. This is Level III therapeutic study. Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.The primary hypothesis of this study was that the survival rate over 10 years of total knee arthroplasties (TKAs) implanted with a navigation system was superior to that of TKAs implanted with a conventional technique. The secondary hypothesis was that the severity of the initial coronal deformity had a negative influence on the survival rate. A national, multicentric, retrospective study was performed in France, including eight university or private centers with high volumes in knee surgery. Cases operated on with either a conventional (control group) or a navigated (study group) technique were matched after calculating the propensity score using the logistic regression technique. All patients were contacted after 10 years or more to determine the survival of the TKA. The need for date and cause of revision were noted. The primary end point of the study was the occurrence of a revision for any mechanical reason. Survival curves were calculated using the Kaplan-Meier's technique, with the primary criterion asl correction in these difficult cases. Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.The aim of this study was to analyze the extent to which postoperative patellofemoral joint (PFJ) kinematics assessed at 6-month follow-up after total knee arthroplasty (TKA) mimics the intraoperative kinematics after final component implantation. The study hypothesis, already proved in terms of tibiofemoral joint (TFJ) kinematics, is that the intraoperative assessment of PFJ kinematics after component implantation is also capable of predicting postoperative knee kinematics during activities of daily living. Twenty patients selected for TKA with patellar resurfacing were implanted using surgical navigation, including patellar component positioning via a novel computer-assisted procedure. This allowed for intraoperative TFJ and PFJ kinematic assessment after final component implantation. At 6-month follow-up, all patients were contacted for follow-up control; in addition to clinical examination, this implied postoperative kinematics assessments by three-dimensional video fluoroscopy of the replaced knee during standard activities of daily living. Several traditional PFJ, as well as TFJ, rotations and translations were calculated intra- and postoperatively and then statistically compared. Good postoperative replication of the intraoperative measurements was observed for most of PFJ variables analyzed, as well as those for TFJ. Relevant statistical analysis also supported the significant consistency between the intra- and postoperative measurements. Pertaining to the present findings on a statistical basis, intraoperative measurements performed at both TFJ and PFJ kinematics using a surgical navigation system under passive conditions, are predictive of the overall knee kinematics experienced at postoperative follow-ups by the same replaced knees in typical activities of daily living. Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.The present randomized controlled study aims to evaluate whether tourniquet application during total knee arthroplasty (TKA) has an effect on (1) thigh muscle strength (quadriceps and hamstring muscle strength) and (2) clinical outcomes (postoperative knee range of motion [ROM], postoperative pain level, and Knee Society Score [KSS]). The effects of tourniquet application during TKA were investigated in 65 patients randomly allocated to one of two groups TKA with a tourniquet and TKA without a tourniquet. Patients in both groups were comparable in terms of the demographic and clinical data (p > 0.05 for age, number of patients, sex, radiographic gonarthrosis grade, American Society of Anesthesiologists [ASA] classification, and body mass index [BMI]). All patients in both groups were operated by the same surgeon using one type of prosthesis. Isokinetic muscle strength (peak torque and total work) of knee extensors (quadriceps) and flexors (hamstrings) was measured in Newton meters (Nm) using a CYBEX 350 isokinetic dynamometer (HUMAC/CYBEX 2009, Stoughton, MA). The combined KSS (knee score + function score), visual analog scale (VAS), and knee ROM were measured preoperatively and at 1 and 3 months postoperatively to evaluate clinical outcomes. There were no significant differences between the two groups in preoperative and postoperative values of isokinetic muscle strength (peak torque and total work) and aforementioned clinical outcomes (p  less then  0.05). The present study has shown that quadriceps strength and clinical outcomes were not improved in the early postoperative period (3 months) when a tourniquet was not used during TKA. Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.BACKGROUND Provider orders for inappropriate advanced imaging, while rarely altering patient management, contribute enough to the strain on available health care resources, and therefore the United States Congress established the Appropriate Use Criteria Program. OBJECTIVES To examine whether co-designing clinical decision support (CDS) with referring providers will reduce barriers to adoption and facilitate more appropriate shoulder ultrasound (US) over magnetic resonance imaging (MRI) in diagnosing Veteran shoulder pain, given similar efficacies and only 5% MRI follow-up rate after shoulder US. METHODS We used a theory-driven, convergent parallel mixed-methods approach to prospectively (1) determine medical providers' reasons for selecting MRI over US in diagnosing shoulder pain and identify barriers to ordering US, (2) co-design CDS, informed by provider interviews, to prompt appropriate US use, and (3) assess CDS impact on shoulder imaging use. CDS effectiveness in guiding appropriate shoulder imaging was evaluated through monthly monitoring of ordering data at our quaternary care Veterans Hospital.
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