Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 87
Filtrar
Mais filtros

Base de dados
Tipo de documento
País de afiliação
Intervalo de ano de publicação
1.
BMC Public Health ; 16: 242, 2016 Mar 09.
Artigo em Inglês | MEDLINE | ID: mdl-26955806

RESUMO

BACKGROUND: Motorcycle helmets reduce both motorcycle-related fatalities and head injuries. Motorcycle crashes are a major public health concern which place economic stress on the U.S. healthcare system. DISCUSSION: Although statewide universal motorcycle helmet laws effectively increase helmet use, most state helmet laws do not require every motorcycle rider to wear a helmet. Herein, we propose and outline the solution of implementing federal motorcycle helmet law, while addressing potential counterarguments. CONCLUSIONS: The decision to ride a motorcycle without a helmet has consequences that affect more than just the motorcyclist. In an effort to prevent unnecessary healthcare costs, injuries, and deaths, public health efforts to increase helmet use through education and legislation should be strongly considered. Helmet use on motorcycles fits squarely within the purview of the federal government public health and economic considerations.


Assuntos
Governo Federal , Dispositivos de Proteção da Cabeça/estatística & dados numéricos , Programas Obrigatórios , Motocicletas/legislação & jurisprudência , Acidentes de Trânsito/economia , Acidentes de Trânsito/mortalidade , Traumatismos Craniocerebrais/economia , Traumatismos Craniocerebrais/prevenção & controle , Custos de Cuidados de Saúde , Política de Saúde , Humanos , Estados Unidos/epidemiologia
2.
Prehosp Disaster Med ; 30(1): 89-92, 2015 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-25483729

RESUMO

Gaining vascular access is essential in the resuscitation of critically ill patients. Intraosseous (IO) placement is a fundamentally important alternative to intravenous (IV) access in conditions where IV access delays resuscitation or is not possible. This case report presents a previously unreported example of prehospital misplacement of an IO catheter into the intra-articular space of the knee joint. This report serves to inform civilian and military first responders, as well as emergency medicine physicians, of intra-articular IO line placement as a potential complication of IO vascular access. Infusion of large amounts of fluid into the joint space could damage the joint and be catastrophic to a patient who needs immediate IV fluids or medications. In addition, intra-articular IO placement could result in septic arthritis of the knee.


Assuntos
Cateterismo Periférico/métodos , Articulação do Joelho , Acidentes de Trânsito , Adulto , Humanos , Masculino
3.
J Am Acad Orthop Surg ; 22(6): 390-401, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24860135

RESUMO

Management of fungal osteomyelitis and fungal septic arthritis is challenging, especially in the setting of immunodeficiency and conditions that require immunosuppression. Because fungal osteomyelitis and fungal septic arthritis are rare conditions, study of their pathophysiology and treatment has been limited. In the literature, evidence-based treatment is lacking and, historically, outcomes have been poor. The most common offending organisms are Candida and Aspergillus, which are widely distributed in humans and soil. However, some fungal pathogens, such as Histoplasma, Blastomyces, Coccidioides, Cryptococcus, and Sporothrix, have more focal areas of endemicity. Fungal bone and joint infections result from direct inoculation, contiguous infection spread, or hematogenous seeding of organisms. These infections may be difficult to diagnose and eradicate, especially in the setting of total joint arthroplasty. Although there is no clear consensus on treatment, guidelines are available for management of many of these pathogens.


Assuntos
Artrite Infecciosa/microbiologia , Micoses/microbiologia , Osteomielite/microbiologia , Infecções Relacionadas à Prótese/microbiologia , Antifúngicos/uso terapêutico , Artrite Infecciosa/diagnóstico , Artrite Infecciosa/terapia , Diagnóstico por Imagem , Humanos , Micoses/diagnóstico , Micoses/terapia , Osteomielite/diagnóstico , Osteomielite/terapia , Infecções Relacionadas à Prótese/diagnóstico , Infecções Relacionadas à Prótese/terapia , Fatores de Risco
4.
J Mater Sci Mater Med ; 25(2): 347-54, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24243225

RESUMO

Zirconia is a transition metal oxide with current applications to orthopedic implants. It has been shown to up-regulate specific genes involved in bio-integration and injury repair. This study examines the effects of zirconia and polydimethylsiloxane (PDMS) hybrids on the proliferation and viability of human primary osteoblast and fibroblast cells. In this study, zirconia-PDMS hybrid coatings were synthesized using a modified sol gel process. The hybrid material was characterized using optical microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and contact angle analysis. This study demonstrates that Zr-PMDS surface materials display hydrophobic surface properties coupled with a preferential deposition of polymer near the surface. Primary osteoblast and fibroblast proliferation and viability on hybrid coated surfaces were evaluated via a rapid screening methodology using WST-1 and calcein AM assays. The cells were seed at 5,000 cells per well in 96-well plates coated with various composition of Zr-PDMS hybrids. The results showed increasing cell proliferation with increasing zirconia concentration, which peaked at 90 % v/v zirconia. Proliferation of osteoblasts and fibroblasts displayed similar trends on the hybrid material, although osteoblasts displayed a bi-phasic dose response by the calcein AM assay. The results of this current study show that Zr-PDMS may be used to influence tissue-implant integration, supporting the use of the hybrid as a promising coating for orthopedic trauma implants.


Assuntos
Materiais Biocompatíveis , Ortopedia , Zircônio/química , Movimento Celular , Células Cultivadas , Humanos , Microscopia Eletrônica de Varredura , Espectroscopia Fotoeletrônica
5.
J Emerg Med ; 47(5): 561-4, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-25214182

RESUMO

BACKGROUND: Obese and overweight people have higher rates of ankle injury, particularly operative ankle fractures. The initial management of unstable ankle fractures includes closed reduction and splinting to limit soft tissue injury and articular cartilage damage until definitive operative fixation can be performed. Adequate reduction can be more difficult in the obese patient due to the weight and additional padding provided by the larger soft tissue envelope. DISCUSSION: A novel technique, described herein by the authors, may be useful in obtaining a suitable reduction of the ankle in the initial management of unstable ankle fractures in the overweight and obese. CONCLUSIONS: Obese patients have unique musculoskeletal injury profiles and special considerations in their management. The authors have found this technique useful in the management of their ankle fractures.


Assuntos
Fraturas do Tornozelo/terapia , Manipulação Ortopédica/métodos , Obesidade/complicações , Analgésicos/uso terapêutico , Fraturas do Tornozelo/complicações , Moldes Cirúrgicos , Humanos , Contenções , Decúbito Dorsal
6.
Pediatr Emerg Care ; 30(8): 516-20, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-25062297

RESUMO

OBJECTIVES: Pediatric femoral fractures are common injuries encountered in the field and in emergency departments. Currently described temporizing management strategies include skeletal traction, skin traction, traction splinting, and posterior splinting, all of which are suboptimal in some instances. J-splinting femur fractures may be advantageous in temporizing management of pediatric femur fractures. The objective of this study was to evaluate the safety and effectiveness of J-splint use for temporizing management of pediatric femur fractures. METHODS: This study used a retrospective review of 18 pediatric patients with femur fractures treated with J-splinting in the emergency department. Patient age, weight, and presplinting and postsplinting pain scale ratings were recorded, as well as presplint and postsplint anteroposterior and lateral radiographic fracture angulation. Pain before and after J-splinting was compared using a paired t test. RESULTS: The mean age of this cohort was 5.4 years (range, 6 months-13 y), with a mean weight of 21.1 kg (range, 7.7-57 kg). In this cohort, there was a significant reduction in pain after reduction and splinting from a mean of 6 to a mean of 1 (P < 0.001). No significant difference in fracture alignment was noted after J-splinting. No complications were noted. CONCLUSIONS: The J-splint is a reliable, simple, and rapidly applied splint that prevents many of the complications and downfalls of other described temporizing measures and helps to provide excellent pain management in the acute setting.


Assuntos
Contenções , Adolescente , Criança , Pré-Escolar , Serviços Médicos de Emergência/métodos , Desenho de Equipamento , Feminino , Fraturas do Fêmur , Humanos , Lactente , Masculino , Medição da Dor , Estudos Retrospectivos , Tração
7.
Conn Med ; 78(2): 91-3, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24741858

RESUMO

Motorcycle-related head injuries and fatalities are a serious public health concern that can be reduced with helmet use. Caring for crash victims places additional economic stress on the healthcare system. The current Connecticut motorcycle helmet law does not require all motorcyclists to wear helmets. Universal motorcycle helmet laws increase helmet use. Efforts to increase helmet use through education and legislation should be considered for review, given the number of deaths and injuries that could be prevented.


Assuntos
Traumatismos Craniocerebrais/economia , Dispositivos de Proteção da Cabeça , Custos de Cuidados de Saúde , Motocicletas/legislação & jurisprudência , Connecticut , Traumatismos Craniocerebrais/terapia , Humanos
8.
Hip Int ; 33(4): 633-639, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-36214269

RESUMO

BACKGROUND: Periprosthetic joint infection is a serious complication and devastating mode of failure of total hip arthroplasty. Various surgical approaches exist for total hip arthroplasty, including the increasingly popularised direct anterior approach. There is no clear consensus on which approach is least associated with periprosthetic joint infection. The objective of this meta-analysis was to compare the rate of periprosthetic joint infection between surgical approaches to primary total hip arthroplasty for osteoarthritis. METHODS: A search of 3 electronic databases (PubMed/MEDLINE, Embase, and Cochrane Library) was conducted for relevant studies up to June 2020 with a defined list of inclusion and exclusion criteria. Randomised controlled trials and longitudinal studies reporting periprosthetic joint infection rates after primary total hip arthroplasty for osteoarthritis were included based on surgical approach. Data extraction was completed, and a meta-analysis was then performed using OpenMeta[Analyst] software. RESULTS: A total of 24,407 hips were included for meta-analysis with an overall PJI incidence of 0.57%. The incidence rate for periprosthetic joint infection was 0.77% in the direct anterior approach group and 0.44% in the non-anterior approach group. The use of an anterior approach for a total hip arthroplasty was associated with an increased risk for periprosthetic joint infection (odds ratio = 1.404; 95% confidence interval, 0.711-2.771; p = 0.03). CONCLUSIONS: The direct anterior approach to total hip arthroplasty may be associated with a significantly increased risk for periprosthetic joint infection compared to non-anterior approaches, even though the overall rate was still small. This should be considered by orthopedic surgeons when choosing the surgical approach.


Assuntos
Artrite Infecciosa , Artroplastia de Quadril , Osteoartrite , Infecções Relacionadas à Prótese , Humanos , Artroplastia de Quadril/efeitos adversos , Infecções Relacionadas à Prótese/epidemiologia , Infecções Relacionadas à Prótese/etiologia , Infecções Relacionadas à Prótese/cirurgia , Fatores de Risco , Reoperação/efeitos adversos , Osteoartrite/etiologia , Artrite Infecciosa/cirurgia , Estudos Retrospectivos
9.
J Orthop Trauma ; 37(2): 70-76, 2023 02 01.
Artigo em Inglês | MEDLINE | ID: mdl-36026544

RESUMO

OBJECTIVES: The 2 main forms of treatment for distal femur fractures are locked lateral plating and retrograde nailing. The goal of this trial was to determine whether there are significant differences in outcomes between these forms of treatment. DESIGN: Multicenter randomized controlled trial. SETTING: Twenty academic trauma centers. PATIENTS/PARTICIPANTS: One hundred sixty patients with distal femur fractures were enrolled. One hundred twenty-six patients were followed 12 months. Patients were randomized to plating in 62 cases and intramedullary nailing in 64 cases. INTERVENTION: Lateral locked plating or retrograde intramedullary nailing. MAIN OUTCOME MEASUREMENTS: Functional scoring including Short Musculoskeletal Functional Assessment, bother index, EQ Health, and EQ Index. Secondary measures included alignment, operative time, range of motion, union rate, walking ability, ability to manage stairs, and number and type of adverse events. RESULTS: Functional testing showed no difference between the groups. Both groups were still significantly affected by their fracture 12 months after injury. There was more coronal plane valgus in the plating group, which approached statistical significance. Range of motion, walking ability, and ability to manage stairs were similar between the groups. Rate and type of adverse events were not statistically different between the groups. CONCLUSIONS: Both lateral locked plating and retrograde intramedullary nailing are reasonable surgical options for these fractures. Patients continue to improve over the course of the year after injury but remain impaired 1 year postoperatively. LEVEL OF EVIDENCE: Therapeutic Level I. See Instructions for Authors for a complete description of levels of evidence.


Assuntos
Fraturas Femorais Distais , Fraturas do Fêmur , Fixação Intramedular de Fraturas , Fraturas Ósseas , Humanos , Fixação Intramedular de Fraturas/efeitos adversos , Placas Ósseas , Fixação Interna de Fraturas , Fraturas Ósseas/cirurgia , Resultado do Tratamento , Fraturas do Fêmur/cirurgia , Fraturas do Fêmur/etiologia , Consolidação da Fratura
10.
J Am Acad Orthop Surg ; 20 Suppl 1: S54-8, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22865138

RESUMO

Immediately after the January 2010 earthquake in Haiti, many private citizens, governmental and nongovernmental organizations, and medical associations struggled to mount an effective humanitarian aid response. The experiences of these groups have led to changes at their institutions regarding disaster preparedness and response to future events. One of the main challenges in a humanitarian medical response to a disaster is determining when to end response efforts and return responsibility for delivery of medical care back to the host nation. For such a transition to occur, the host nation must have the capacity to deliver medical care. In Haiti, minimal capacity to deliver such care existed before the earthquake, making subsequent transition difficult. If successful, several initiatives proposed to improve disaster response and increase surgical capacity in Haiti could be deployed to other low- and middle-income countries.


Assuntos
Planejamento em Desastres , Terremotos , Ferimentos e Lesões/terapia , Altruísmo , Planejamento em Desastres/organização & administração , Desastres , Haiti , Humanos , Sistema Musculoesquelético/lesões , Procedimentos Ortopédicos , Ferimentos e Lesões/cirurgia
11.
J Am Acad Orthop Surg ; 20 Suppl 1: S70-3, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22865142

RESUMO

Current combat battlefield injuries are among the most complex and challenging orthopaedic cases. These injuries carry high risks for exsanguination and global contamination of extensive soft-tissue and complicated bony injuries. Military orthopaedic surgeons must employ the latest advances in acute combat casualty care to achieve favorable outcomes. Adaptive changes over the past 10 years of war have given today's surgeons the armamentarium to optimize patient care. Innovative methods of damage control resuscitation and surgery have led to increased survival. However, the fundamentals of surgical hemostasis and decontamination remain critical to successful management. The acute treatment of combat casualties involves a continuum of care from the point of injury through transport out of theater. Future research and education are paramount to better prepare military orthopaedic surgeons to further increase survivability and enhance the outcomes of service members with complex wounds.


Assuntos
Guerra , Ferimentos e Lesões/terapia , Desbridamento , Extremidades/lesões , Humanos , Procedimentos Ortopédicos , Guias de Prática Clínica como Assunto , Torniquetes , Ferimentos e Lesões/microbiologia , Ferimentos e Lesões/cirurgia
12.
J Am Acad Orthop Surg ; 20 Suppl 1: S99-102, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22865148

RESUMO

Since the beginning of the conflicts in Iraq and Afghanistan more than a decade ago, much has been learned with regard to combat casualty care. Although progress has been significant, knowledge gaps still exist. The seventh Extremity War Injuries symposium, held in January 2012, reviewed the current state of knowledge and defined knowledge gaps in acute care, reconstructive care, and rehabilitative care in order to provide policymakers information on the areas in which research funding would be the most beneficial.


Assuntos
Extremidades/lesões , Extremidades/cirurgia , Procedimentos Ortopédicos , Pesquisa , Guerra , Ferimentos e Lesões/terapia , Humanos , Procedimentos Ortopédicos/reabilitação , Procedimentos de Cirurgia Plástica
13.
Clin Orthop Relat Res ; 470(10): 2895-904, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-22487879

RESUMO

BACKGROUND: Although numerous authors have described surgical experiences following major disasters, little is known regarding the needs of and barriers to care faced by surgeons during such disasters. QUESTIONS/PURPOSES: We therefore (1) identified and compared recurrent interview themes essential to the disaster response following the 2010 Haiti earthquake; (2) determined the difference in reported disaster equipment management task difficulty between disaster-trained and untrained volunteers; and (3) approximated the quantity of various procedures performed. METHODS: We conducted 14 interviews with selected orthopaedic surgeon volunteers. We also invited the 504 members of the American Academy of Orthopaedic Surgeons (AAOS), who registered as Haiti earthquake volunteers, to complete an online survey; 174 (35%) completed the survey and 131 (26%) were present in Haiti during the 30 days after the earthquake. Recurrent interview themes were identified, quantified, and compared using Poisson regression analysis. The difference in disaster equipment management difficulty scores was determined with a Wilcoxon rank-sum test. RESULTS: Of 10 recurrent interview themes, group organization (31 occurrences) was mentioned much more often than all but two of the remaining nine themes. Compared with disaster-untrained respondents, equipment management tended to be less challenging for disaster-trained respondents. Transporting to the treatment site and security during storage at the site were less challenging (19.5% and 16.5% decreases, respectively). Revision surgeries, guillotine amputations, fasciotomies, and internal fixations, suggestive of inappropriate disaster care, were frequently reported. CONCLUSIONS: Organizational and training barriers obstructed orthopaedic care delivery immediately after the Haiti earthquake. Disaster training and outcomes require further study to improve care in future catastrophes.


Assuntos
Terremotos , Procedimentos Ortopédicos/normas , Garantia da Qualidade dos Cuidados de Saúde , Trabalho de Resgate/normas , Adulto , Feminino , Haiti , Humanos , Masculino , Pessoa de Meia-Idade , Fatores de Tempo
14.
Med Res Arch ; 10(12)2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36874620

RESUMO

The increasing prevalence of multi-drug resistant pathogens has led to a renewed focus on the use of silver as an antibiotic-independent antimicrobial. Unfortunately, the use of many silver formulations may be limited by an uncontrolled release of silver with the potential for significant cytotoxic effects. Silver carboxylate (AgCar) has emerged as an alternative formulation of silver with the potential to mitigate these concerns while still displaying significant bactericidal activity. This article reviews the efficacy of silver carboxylate formulations as a promising novel antibiotic-independent antimicrobial. This study was conducted through a search of five electronic databases (PubMed, Embase, MEDLINE, Cochrane Library, and Web of Science) for relevant studies up to September 2022. Searches were conducted for types of "silver carboxylate" formulations. Sources were compiled based on title and abstract and screened for inclusion based on relevance and study design. A review of the antimicrobial activity and cytotoxicity of silver carboxylate was compiled based on this search. Current body of data suggests that silver carboxylate shows promise as an emerging antibiotic-independent antimicrobial, with significant bactericidal effects while minimizing cytotoxicity. Silver carboxylate addresses several of the limitations of more primitive formulations, including controlled dosing and fewer negative effects on eukaryotic cell lines. These factors are concentration-dependent and largely rely on the vehicle system used to deliver it. Although several silver carboxylate-based formulations like titanium dioxide/polydimethylsiloxane (TiO2/PDMS) matrix-eluting AgCar have shown promising results in vitro, and could potentially be utilized independently or in conjunction with current and future antimicrobial therapies, there is a need for further in vivo studies to validate their overall safety and efficacy profile.

15.
J Orthop Res ; 40(10): 2448-2456, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-34935196

RESUMO

Prevention and treatment of orthopedic device-related infection (ODRI) is complicated by the formation of bacterial biofilms. Biofilm formation involves dynamic production of macromolecules that contribute to the structure of the biofilm over time. Limitations to clinically relevant and translational biofilm visualization and measurement hamper advances in this area of research. In this paper, we present a multimodal methodology for improved characterization of Pseudomonas aeruginosa grown on polyether ether ketone (PEEK) as a model for ODRI. PEEK discs were inoculated with P. aeruginosa, incubated for 4-48 h time intervals, and fixed with 10% neutral-buffered formalin. Samples were stained with fluorescent dyes to measure biofilm components, imaged with confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM), and quantified. We were able to visualize and quantify P. aeruginosa biofilm growth on PEEK implants over 48 h. Based on imaging data, we propose a generalized growth cycle that can inform orthopedic diagnostic and treatment for this pathogen on PEEK. These results demonstrate the potential of using a combined CLSM and SEM approach for determining biofilm structure, composition, post-adherence development on orthopedic materials. This model may be used for quantitative biofilm analysis for other pathogens and other materials of orthopedic relevance for translational study of ODRI.


Assuntos
Corantes Fluorescentes , Pseudomonas aeruginosa , Benzofenonas , Biofilmes , Éteres , Formaldeído , Cetonas/farmacologia , Polímeros
16.
Surg Infect (Larchmt) ; 23(9): 769-780, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-36178480

RESUMO

Background: The increase of multi-drug-resistant organisms has revived the use of silver as an alternative antibiotic-independent antimicrobial. Although silver's multimodal mechanism of action provides low risk for bacterial resistance, high local and uncontrolled concentrations have shown toxicity. This has resulted in efforts to develop novel silver formulations that are safer and more predictable in their application. Optimization of silver as an antimicrobial is crucial given the growing resistance profile against antibiotics. This article reviews formulations of silver used as antimicrobials, focusing on the mechanisms of action, potential for toxicity, and clinical applications. Methods: A search of four electronic databases (PubMed, Embase, MEDLINE, and Cochrane Library) was conducted for relevant studies up to January 2022. Searches were conducted for the following types of silver: ionic, nanoparticles, colloidal, silver nitrate, silver sulfadiazine, silver oxide, silver carboxylate, and AQUACEL® (ConvaTec, Berkshire, UK). Sources were compiled based on title and abstract and screened for inclusion based on relevance and study design. Results: A review of the antimicrobial activity and uses of ionic silver, silver nanoparticles, colloidal silver, silver nitrate, silver sulfadiazine, silver oxide, Aquacel, and silver carboxylate was conducted. The mechanisms of action, clinical uses, and potential for toxicity were studied, and general trends between earlier and more advanced formulations noted. Conclusions: Early forms of silver have more limited utility because of their uncontrolled release of silver ions and potential for systemic toxicity. Multiple new formulations show promise; however, there is a need for more prospective in vivo studies to validate the clinical potential of these formulations.


Assuntos
Anti-Infecciosos , Nanopartículas Metálicas , Humanos , Sulfadiazina de Prata , Antibacterianos/farmacologia , Antibacterianos/uso terapêutico , Carboximetilcelulose Sódica , Nanopartículas Metálicas/uso terapêutico , Estudos Prospectivos , Nitrato de Prata , Prata/farmacologia , Prata/uso terapêutico , Anti-Infecciosos/farmacologia , Anti-Infecciosos/uso terapêutico , Óxidos
17.
Spine J ; 22(3): 495-503, 2022 03.
Artigo em Inglês | MEDLINE | ID: mdl-34666180

RESUMO

BACKGROUND CONTEXT: Cutibacterium acnes (C. acnes) is a gram-positive facultative anaerobe found in the deep sebaceous follicles of the skin on the shoulder and back. C. acnes has been increasingly recognized as a pathogen in spinal surgical site infection (SSI) especially in the presence of instrumentation. PURPOSE: This study assesses whether a silver carboxylate-doped titanium dioxide-polydimethylsiloxane (TiO2-PDMS) coating can decrease C. acnes adherence and biofilm formation on PEEK and four other commonly used spinal implant materials, stainless steel, cobalt chromium, titanium, and titanium alloy. STUDY DESIGN: We compared the adherence of C. acnes over 24 hours between uncoated, 95:5 TiO2 to PDMS ratio with 10× silver carboxylate coating and a 100% silver carboxylate coating on each implant material, which were uniformly saw cut and sterilized. Implants were then subjected to scanning electron microscopy (SEM) and confocal scanning laser microscopy (CSLM). METHODS: Samples were coated using 95:5 TiO2-PDMS 10× silver carboxylate, 100% silver carboxylate, or left uncoated. C. acnes was applied onto the samples and allowed to adhere for periods of 4, 8, 12, 16, or 20 hours. Nonadherent bacteria were then washed from the samples. These samples were then allowed to continue incubating for a total of 24 hours. SEM and confocal laser scanning microscope were used to visualize all samples for the presence of biofilm and quantification of C. acnes adherence at each time point. RESULTS: The 95:5 TiO2-PDMS 10× silver carboxylate coating was able to significantly decrease C. acnes adherence on PEEK after 8, 12, 16, and 20 hours of adherence. No statistical difference was found between the 95:5 TiO2-PDMS 10× silver carboxylate coating and the 100% silver carboxylate positive control. We previously observed extensive C. acnes biofilm formation on uncoated PEEK, but none on PEEK coated with either the 95:5 TiO2-PDMS 10× silver carboxylate or 100% Ag coating . Furthermore, no biofilm formation was observed on stainless steel, cobalt chromium, titanium, and titanium alloy coated with 95:5 TiO2-PDMS 10× silver carboxylate or 100% Ag coating. CONCLUSION: A 95:5 TiO2-PDMS 10× silver carboxylate coating decreases C. acnes adhesion and prevents biofilm formation on PEEK and other common orthopedic implant materials. CLINICAL SIGNIFICANCE: A 95:5 TiO2-PDMS 10× silver carboxylate coating may help decrease spinal SSI due to C. acnes, especially in procedures with instrumentation.


Assuntos
Prata , Titânio , Benzofenonas , Biofilmes , Materiais Revestidos Biocompatíveis , Dimetilpolisiloxanos , Éteres , Humanos , Cetonas , Polímeros
18.
Surg Infect (Larchmt) ; 23(3): 254-261, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-35085476

RESUMO

Background: This study presents the effectiveness of a combined silver carboxylate (AgCar) and chlorohexidine gluconate (AgCar:CHG) chemistry assessed against two commonly encountered nosocomial pathogens, Methicillin-resistant Staphylococcus aureus (MRSA) and Cutibacterium acnes, within the context of surgical antisepsis and wound care. Methods: Through an Institutional Review Board- and Institutional Animal Care and Use Committee (IACUC)-approved protocol, AgCar:CHG was applied to live Yucatan porcine skin and visualized by fast red and green staining to assess level of skin penetration. Dose response curves for Cutibacterium acnes and MRSA were generated to determine the optimal therapeutic ratio of AgCar to CHG. Coatings were applied to two different clinically available sutures and antimicrobial efficacy was evaluated at 24-hour intervals using Kirby-Bauer (KB) assays. Graphite furnace atomic absorption spectroscopy was used to measure AgCar elution from sutures over time. Results: Synergistic application of AgCar:CHG demonstrated deep pilosebaceous gland penetration on Yucatan pig skin. The therapeutic concentration range of AgCar was determined to be between 120 × -150 × and 30 × -60 × dopage for MRSA and Cutibacterium acnes, respectively. A 1:1 therapeutic ratio of AgCar to CHG was found to have 100% bactericidal activity against both pathogens. Sutures coated with AgCar:CHG showed sustained antimicrobial activity against MRSA and Cutibacterium acnes, and were significantly more efficacious than antimicrobial sutures over the three- to four-day period (p < 0.01). Conclusions: This AgCar:CHG chemistry demonstrates deep skin penetration, extended elution, and broad-spectrum antimicrobial activity compared with commercially available options. This chemistry shows promise as an additional tool for the prophylaxis of surgical site infections.


Assuntos
Anti-Infecciosos Locais , Staphylococcus aureus Resistente à Meticilina , Animais , Anti-Infecciosos Locais/farmacologia , Clorexidina/análogos & derivados , Clorexidina/farmacologia , Humanos , Prata/farmacologia , Infecção da Ferida Cirúrgica/prevenção & controle , Suínos
19.
Surg Infect (Larchmt) ; 23(10): 924-932, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36413347

RESUMO

Background: Vancomycin-resistant Enterococcus faecalis and multi-drug-resistant (MDR) Acinetobacter baumannii are rising contributors to spinal fusion and fracture-associated infections (FAI), respectively. These MDR bacteria can form protective biofilms, complicating traditional antibiotic treatment. This study explores the effects of the antibiotic-independent antimicrobial silver carboxylate (AgCar)-doped coating on the adherence sand proliferation of these pathogens on orthopedic implant materials utilized in spinal fusion and orthopedic trauma fixation. Methods: Multi-drug-resistant Acinetobacter baumannii and vancomycin-resistant Enterococcus faecalis were inoculated on five common implant materials: cobalt chromium, titanium, titanium alloy, polyether ether ketone, and stainless steel. Dose response curves were generated to assess antimicrobial potency. Scanning electron microscopy and confocal laser scanning microscopy were utilized to characterize and quantify growth and adherence on each material. Results: The optimal AgCar concentration was a 95% titanium dioxide (TiO2)-5% polydimethylsiloxane (PDMS) matrix combined with 10 × silver carboxylate, which inhibited bacterial proliferation by 89.40% (p = 0.001) for MDR Acinetobacter baumannii and 84.02% (p = 0.001) for vancomycin-resistant Enterococcus faecalis compared with uncoated implants. A 95% TiO2-5% PDMS matrix combined with 10 × AgCar was equally effective at inhibiting bacterial proliferation across all implant materials for MDR Acinetobacter baumannii (p = 0.19) and vancomycin-resistant Enterococcus faecalis (p = 0.07). A 95% TiO2-5% PDMS matrix with 10 × AgCar is effective at decreasing bacterial adherence of both MDR Acinetobacter baumannii and vancomycin-resistant Enterococcus faecalis on implant materials. Conclusions: Application of this antibiotic-independent coating for surgery in which these implant materials might be used may prevent adherence, biofilm formation, spinal infections, and FAI by MDR Acinetobacter baumannii and vancomycin-resistant Enterococcus faecalis.


Assuntos
Anti-Infecciosos , Fusão Vertebral , Humanos , Titânio/farmacologia , Prata/farmacologia , Enterococcus faecalis , Antibacterianos/farmacologia , Proliferação de Células
20.
J Bone Joint Surg Am ; 104(10): e44, 2022 05 18.
Artigo em Inglês | MEDLINE | ID: mdl-34932526

RESUMO

ABSTRACT: Globally, the burden of musculoskeletal conditions continues to rise, disproportionately affecting low and middle-income countries (LMICs). The ability to meet these orthopaedic surgical care demands remains a challenge. To help address these issues, many orthopaedic surgeons seek opportunities to provide humanitarian assistance to the populations in need. While many global orthopaedic initiatives are well-intentioned and can offer short-term benefits to the local communities, it is essential to emphasize training and the integration of local surgeon-leaders. The commitment to developing educational and investigative capacity, as well as fostering sustainable, mutually beneficial partnerships in low-resource settings, is critical. To this end, global health organizations, such as the Consortium of Orthopaedic Academic Traumatologists (COACT), work to promote and ensure the lasting sustainability of musculoskeletal trauma care worldwide. This article describes global orthopaedic efforts that can effectively address musculoskeletal care through an examination of 5 domains: clinical care, clinical research, surgical education, disaster response, and advocacy.


Assuntos
Doenças Musculoesqueléticas , Ortopedia , Países em Desenvolvimento , Saúde Global , Humanos , Renda , Voluntários
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA