Trauma Center Meidling

Vienna, Austria

Trauma Center Meidling

Vienna, Austria
Time filter
Source Type

Pemmer B.,Vienna University of Technology | Roschger A.,Vienna University of Technology | Roschger A.,Ludwig Boltzmann Institute of Osteology at the Hanusch Hospital of and Trauma Center Meidling | Wastl A.,Vienna University of Technology | And 8 more authors.
Bone | Year: 2013

Trace elements are chemical elements in minute quantities, which are known to accumulate in the bone. Cortical and trabecular bones consist of bone structural units (BSUs) such as osteons and bone packets of different mineral content and are separated by cement lines. Previous studies investigating trace elements in bone lacked resolution and therefore very little is known about the local concentration of zinc (Zn), strontium (Sr) and lead (Pb) in BSUs of human bone. We used synchrotron radiation induced micro X-ray fluorescence analysis (SR μ-XRF) in combination with quantitative backscattered electron imaging (qBEI) to determine the distribution and accumulation of Zn, Sr, and Pb in human bone tissue.Fourteen human bone samples (10 femoral necks and 4 femoral heads) from individuals with osteoporotic femoral neck fractures as well as from healthy individuals were analyzed. Fluorescence intensity maps were matched with BE images and correlated with calcium (Ca) content. We found that Zn and Pb had significantly increased levels in the cement lines of all samples compared to the surrounding mineralized bone matrix. Pb and Sr levels were found to be correlated with the degree of mineralization. Interestingly, Zn intensities had no correlation with Ca levels. We have shown for the first time that there is a differential accumulation of the trace elements Zn, Pb and Sr in BSUs of human bone indicating different mechanisms of accumulation. © 2013 The Authors.

Ottomann C.,Unfallkrankenhaus Berlin | Stojadinovic A.,Combat Wound Initiative Program | Stojadinovic A.,Uniformed Services University of the Health Sciences | Lavin P.T.,Boston Biostatistics Research Foundation | And 5 more authors.
Annals of Surgery | Year: 2012

BACKGROUND: As extracorporeal shock wave therapy (ESWT) can enhance healing of skin graft donor sites, this study focused on shock wave effects in burn wounds. METHODS: A predefined cohort of 50 patients (6 with incomplete data or lost to follow-up) with acute second-degree burns from a larger study of 100 patients were randomly assigned between December 2006 and December 2007 to receive standard therapy (burn wound debridement/topical antiseptic therapy) with (n = 22) or without (n = 22) defocused ESWT (100 impulses/cm at 0.1 mJ/mm) applied once to the study burn, after debridement. Randomization sequence was computer-generated, and patients were blinded to treatment allocation. The primary endpoint, time to complete burn wound epithelialization, was determined by independent, blinded-observer. A worst case scenario was applied to the missing cases to rule out the impact of withdrawal bias. RESULTS: Patient characteristics across the 2 study groups were balanced (P > 0.05) except for older age (53 ± 17 vs. 38 ± 13 years, P = 0.002) in the ESWT group. Mean time to complete (≥95%) epithelialization (CE) for patients that did and did not undergo ESWT was 9.6 ± 1.7 and 12.5 ± 2.2 days, respectively (P < 0.0005). When age (continuous variable) and treatment group (binary) were examined in a linear regression model to control the baseline age imbalance, time to CE, age was not significant (P = 0.33) and treatment group retained significance (P < 0.0005). Statistical significance (P = 0.001) was retained when ESWT cases with missing follow-up were assigned the longest time to CE and when controls with missing follow-up were assigned the shortest time to CE. CONCLUSIONS: In this randomized phase II study, application of a single defocused shock wave treatment to the superficial second-degree burn wound after debridement/topical antiseptic therapy significantly accelerated epithelialization. Copyright © 2011 by Lippincott Williams & Wilkins.

Thaler H.W.,Trauma Center Meidling | Frisee F.,Trauma Center Lorenz Bohler | Korninger C.,Trauma Center Lorenz Bohler
Journal of Trauma - Injury, Infection and Critical Care | Year: 2010

Background: The purpose of our prospective study was to analyze how many patients with hip fractures are on treatment with platelet aggregation inhibitors (aspirin and clopidogrel), how many of these patients have impaired platelet function as measured by the PFA-100, and whether there is an association between perioperative blood loss and either intake of platelet inhibitors or platelet function. Methods: Four hundred sixty-two patients with hip fractures were investigated. Surgery (most commonly dynamic screw fixation and hemiarthroplasty) was performed on day 1.3 (in patients on clopidogrel on day 3). Platelet function analysis was performed with the PFA-100, using the collagen and epinephrine closure time. Transfusion requirement and drain blood loss were measured. Results: Ninety-eight patients (21%) were on treatment with aspirin, of those, 64 patients (65%) had impaired platelet function. Twenty-two patients (5%) were on clopidogrel, of those, 15 patients (68%) had impaired platelet function. Of the patients without platelet aggregation inhibitors, 29% had impaired platelet function. Mortality, major bleeding, red blood cell requirement, and drainage blood loss did not correlate with platelet aggregation inhibitor intake or platelet function. Conclusions: It is not possible to predict the platelet function by asking patients about intake of aspirin or clopidogrel. Perioperative blood loss did not correlate with either history of platelet aggregation inhibitor intake or platelet function as determined by PFA-100. Therefore, the measurement of platelet function is of little clinical relevance in patients with hip fractures. In patients treated with aspirin, surgery should not be delayed, and patients on clopidogrel can be operated on 3 days after stopping the drug without increased bleeding risk. Copyright © 2010 by Lippincott Williams & Wilkins.

Mittermayr R.,Ludwig Boltzmann Institute for Experimental and Clinical Traumatology | Mittermayr R.,Trauma Center Meidling | Antonic V.,Combat Wound Initiative Program | Antonic V.,Foundation Medicine | And 6 more authors.
Wound Repair and Regeneration | Year: 2012

For almost 30 years, extracorporeal shock wave therapy has been clinically implemented as an effective treatment to disintegrate urinary stones. This technology has also emerged as an effective noninvasive treatment modality for several orthopedic and traumatic indications including problematic soft tissue wounds. Delayed/nonhealing or chronic wounds constitute a burden for each patient affected, significantly impairing quality of life. Intensive wound care is required, and this places an enormous burden on society in terms of lost productivity and healthcare costs. Therefore, cost-effective, noninvasive, and efficacious treatments are imperative to achieve both (accelerated and complete) healing of problematic wounds and reduce treatment-related costs. Several experimental and clinical studies show efficacy for extracorporeal shock wave therapy as means to accelerate tissue repair and regeneration in various wounds. However, the biomolecular mechanism by which this treatment modality exerts its therapeutic effects remains unclear. Potential mechanisms, which are discussed herein, include initial neovascularization with ensuing durable and functional angiogenesis. Furthermore, recruitment of mesenchymal stem cells, stimulated cell proliferation and differentiation, and anti-inflammatory and antimicrobial effects as well as suppression of nociception are considered important facets of the biological responses to therapeutic shock waves. This review aims to provide an overview of shock wave therapy, its history and development as well as its current place in clinical practice. Recent research advances are discussed emphasizing the role of extracorporeal shock wave therapy in soft tissue wound healing. © 2012 by the Wound Healing Society.

Dimai H.P.,Medical University of Graz | Svedbom A.,OptumInsight | Fahrleitner-Pammer A.,Medical University of Graz | Pieber T.,Medical University of Graz | And 6 more authors.
Osteoporosis International | Year: 2013

Summary: Incidence rates of proximal humeral fractures in Austria over a period of twenty years (1989-2008) were estimated. Age standardized incidence rates increased until 2008, primarily driven by an increase in incidence rates in women. Introduction: The aim of the prevailing study was to estimate incidence rates of proximal humeral fractures and to assess changes in trend in the Austrian population aged 50 years and above, over a period of 20 years (1989-2008). Methods: Number of proximal humeral fractures were obtained from the Austrian Hospital Discharge Register for the entire population >50 years of age. Adjustment factors were determined for multiple registrations of the same diagnosis, and for the fact that not all patients with proximal humeral fractures are treated in an inpatient setting. To analyze the overall change in this type of fracture for the period, average annual changes expressed as incidence rate ratios were calculated. Results: The estimated age-standardized incidence (fractures per 100,000 individuals) of proximal humeral fractures among Austrians >50 years of age increased in men from 112 (95 % CI, 99-124) to 141 (129-153) and in women from 222 (202-241) to 383 (360-406). The increase appeared to be linear with no leveling off towards the end of the study period. Conclusion: While some caution is necessary when interpreting the results given the use of adjustment factors, there appears to have been a rise in the incidence of proximal humeral fractures in Austria in both men and women, with no leveling off in recent years. The reasons for this are not clear, but in the light of previously reported leveling off in the increase in the incidence of hip fractures, a change in the patterns of falls cannot be ruled out. © 2013 International Osteoporosis Foundation and National Osteoporosis Foundation.

Kniepeiss D.,Medical University of Graz | Wagner D.,Medical University of Graz | Pienaar S.,Trauma Center Meidling | Thaler H.W.,Trauma Center Meidling | And 3 more authors.
Ageing Research Reviews | Year: 2012

Introduction: Many transplant studies in elderly patients focus on survival and mortality rates. It was the aim of this review to evaluate publications dealing with individual patient performance and independence. Methods: The literature search included all articles retrievable for the hit " transplantation in elderly recipients" between 1960 and 2010. For quality search the inclusion criteria were as follows: older than 60 years and transplanted kidney, liver, heart, lung or pancreas from a deceased or living donor. We focussed on parameters concerning quality of life, frailty, nutritional status/weight loss, drugs/interactions/polypharmacy, gait/osteoporosis/fracture, delirium/dementia and geriatric assessment to address physical and psychosocial functionality of elderly recipients. Results: The initial hit list contained 1427 citations from electronic databases. 249 abstracts thereof were selected for full review. A total of 60 articles met final inclusion criteria. Finally, only five studies met the qualitative inclusion criteria as listed above. Conclusion: The number of elderly patients placed on waiting lists has increased dramatically and will further grow. Interdisciplinary collaboration and distinct patient selection is recommended in most of the studies. However, data concerning quality of life and related parameters in elderly transplant recipients are rare. © 2011 Elsevier B.V.

Elster E.A.,Combat Medical | Elster E.A.,Uniformed Services University of the Health Sciences | Stojadinovic A.,U.S. Army | Forsberg J.,Combat Medical | And 4 more authors.
Journal of Orthopaedic Trauma | Year: 2010

Objectives: Delayed and nonunion of the tibia are not uncommon in orthopaedic practice. Multiple methods of treatment have been developed with variable results. The objective of this study was to define disease-specific and treatment-related factors of prognostic significance in patients undergoing shock wave therapy for tibia nonunion. Design: Retrospective analysis. Patients: One hundred ninety-two patients treated with extracorporeal shock wave therapy (ESWT) at a single referral trauma center, AUVA-Trauma Center Meidling, a large single-referral trauma center located in Vienna, Austria, in an attempt to determine the feasibility and factors associated with the use of ESWT in the treatment for tibia nonunion. Intervention: ESWT coupled with posttreatment immobilization, external fixation, or ESWT alone. Main Outcome Measures: Fracture healing, overall healing percent, and factors associated with ESWT success or failure. Results: At the time of last follow up, 138 of 172 (80.2%) patients have demonstrated complete fracture healing. Mean time from first shock wave therapy to complete healing of the tibia nonunion was 4.8 ± 4.0 months. Number of orthopaedic operations (P = 0.003), shock wave treatments (P = 0.002), and pulses delivered (P = 0.04) were significantly associated with complete bone healing. Patients requiring multiple (more than one) shock wave treatments versus a single treatment had a significantly lower likelihood of fracture healing (P = 0.003). This may be attributable to the finding that a significantly greater proportion of patients with multiple rather than single ESWT treatments had three or more prior orthopaedic procedures (more than one ESWT, 63.9% versus one ESWT, 23.5%; P < 0.001). Conclusions: ESWT is a feasible treatment modality for tibia nonunion. Copyright © 2010 by Lippincott Williams & Wilkins.

Mittermayr R.,Ludwig Boltzmann Institute for Experimental and Clinical Traumatology | Mittermayr R.,Trauma Center Meidling | Hartinger J.,Ludwig Boltzmann Institute for Experimental and Clinical Traumatology | Antonic V.,University of Vienna | And 9 more authors.
Annals of Surgery | Year: 2011

Objective: To assess the time-dependent treatment effects of extracorporeal shock wave therapy (ESWT) in a standard rodent ischemic epigastric flap model. Background: ESWT has been shown to accelerate tissue repair in acute and chronic wounds and improve graft survival, but the mechanism remains incompletely understood. Methods: Shock waves at 0.1 mJ/mm and 5 impulses/s (total 300 impulses) were applied to the epigastric flap ischemic region at various times pre-, immediately and 24 hours postischemic insult. Flap survival; vascular perfusion; vessel number; von Willebrand factor and smooth muscle actin protein expression as well as in vivo vascular endothelial growth factor receptor 2 expression were evaluated at 1, 3, and 7 days postoperatively in ESWT-treated and untreated controls. Results: Flap perfusion, microvessel number, and survival (through reduced flap contraction and necrosis) were significantly enhanced in the treated groups compared with controls, irrespective of timing of shock wave treatment (preischemia vs. postischemia). Vascular endothelial growth factor receptor 2 expression was dynamically upregulated in response to ESWT. Conclusion: Shock wave preconditioning and treatment postischemic insult improves skin flap survival through neovascularization and early upregulation of angiogenesis-related growth factors. © 2011 Lippincott Williams & Wilkins.

Furia J.P.,SUN Orthopaedics and Sports Medicine | Juliano P.J.,Penn State Milton rshey Medical Center | Wade A.M.,Penn State Milton rshey Medical Center | Schaden W.,Trauma Center Meidling | Mittermayr R.,Ludwig Boltzmann Institute for Experimental and Clinical Traumatology
Journal of Bone and Joint Surgery - Series A | Year: 2010

Background: The current "gold standard" for treatment of chronic fracture nonunion in the metaphyseal-diaphyseal region of the fifth metatarsal is intramedullary screw fixation. Complications with this procedure, however, are not uncommon. Shock wave therapy can be an effective treatment for fracture nonunions. The purpose of this study was to evaluate the safety and efficacy of shock wave therapy as a treatment of these nonunions. Methods: Twenty-three patients with a fracture nonunion in the metaphyseal-diaphyseal region of the fifth metatarsal received high-energy shock wave therapy (2000 to 4000 shocks; energy flux density per pulse, 0.35 mJ/mm2), and twenty other patients with the same type of fracture nonunion were treated with intramedullary screw fixation. The numbers of fractures that were healed at three and six months after treatment in each group were determined, and treatment complications were recorded. Results: Twenty of the twenty-three nonunions in the shock wave group and eighteen of the twenty nonunions in the screw fixation group were healed at three months after treatment. One of the three nonunions that had not healed by three months in the shock wave group was healed by six months. There was one complication in the shock wave group (post-treatment petechiae) and eleven complications in the screw-fixation group (one refracture, one case of cellulitis, and nine cases of symptomatic hardware). Conclusions: Both intramedullary screw fixation and shock wave therapy are effective treatments for fracture nonunion in the metaphyseal-diaphyseal region of the fifth metatarsal. Screw fixation is more often associated with complications that frequently result in additional surgery. Level of Evidence: Therapeutic Level III. See Instructions to Authors for a complete description of levels of evidence. Copyright © 2010 by The Journal of Bone and Joint Surgery, Incorporated.

Huang C.,Nippon Medical School | Huang C.,Meitan General Hospital | Huang C.,Harvard University | Holfeld J.,Innsbruck Medical University | And 3 more authors.
Trends in Molecular Medicine | Year: 2013

It has long been thought that the effectiveness and efficiency of physical therapy would improve if our understanding of the cell biology/biochemistry that participates in mechanics could be improved. Traditional physical therapy focuses primarily on rehabilitation, but recent developments in mechanobiology that illuminated the effects of physical forces on cells and tissues have led to the realization that the old therapy model should be updated. To achieve this here, the term mechanotherapy is proposed and recent studies showing how mechanotherapies target particular cells, molecules, and tissues are reviewed. These studies show how mechanical force modulates integrin-mediated processes and other mechanosensors such as gap junctions, hemichannels, primary cilia, transient receptor potential channels (cell targeting), and intracellular mechanosignaling pathways (molecule targeting). The role of mechanical force in various therapies, including microdeformation, shockwave, tissue expansion, distraction osteogenesis, and surgical tension reduction (tissue targeting) therapies, is reviewed. This review aims to jumpstart research into this field, which promises to generate a new era of viable and novel pharmacological and engineering interventions that can overcome human diseases. © 2013 Elsevier Ltd.

Loading Trauma Center Meidling collaborators
Loading Trauma Center Meidling collaborators