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1.
Ann Plast Surg ; 2024 Jun 17.
Artigo em Inglês | MEDLINE | ID: mdl-38896875

RESUMO

INTRODUCTION: Carpal tunnel syndrome is commonly managed by hand and upper extremity surgeons. Though electrodiagnostics are considered the gold standard diagnosis, the scratch collapse test (SCT) was introduced to address uncertainty, despite remains controversial. To address this, we sought to identify if the SCT can correlate with EDS studies if the SCT can identify actual changes in measures of nerves. METHODS: We reviewed patients who underwent electrodiagnostic studies (EDX) and SCT for carpal tunnel syndrome (CTS). Demographic data as well as sensorimotor amplitudes, latencies, and velocities on nerve conduction and electromyography were collected. Analogous values based on SCT findings were analyzed for statistical significance. RESULTS: Three hundred fifty patients with CTS were included. Sensory and motor velocities and amplitudes were significantly lower in patients with a positive SCT. Motor values were independent of age, though younger patients had larger measured changes. Obese patients did not show any motor EDX changes with the scratch collapse test, though thinner patients did. All changes were seen in nerve conduction only. CONCLUSIONS: Carpal tunnel can be a difficult problem to diagnose as one study does not singularly determine the condition. The SCT was introduced to facilitate easier diagnosis. We demonstrate that the SCT correlates with changes on nerve conduction studies, especially in relation to decreased amplitudes and velocities, suggesting that it does identify changes in nerve with compression, specifically axonal, and myelin damage. These findings support the use of the SCT maneuver to evaluate and diagnose in appropriate patients.

2.
Arch Phys Med Rehabil ; 104(6): 878-891, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-36639091

RESUMO

OBJECTIVE: To identify the most important health-related quality of life (HRQOL) domains and patient-reported outcomes after upper extremity transplantation (UET) in individuals with upper extremity amputation. DESIGN: Verbatim audio-recordings of individual interviews and focus groups were analyzed using qualitative, grounded theory-based methods to identify important domains of HRQOL and provide guidance for outcomes measurement after UET. SETTING: Individual interviews were conducted by phone. Focus groups were conducted at 5 upper extremity vascularized composite allotransplantation (VCA) centers in the US and at an international conference of VCA experts. PARTICIPANTS: Individual phone interviews were conducted with 5 individuals with lived experience of UET. Thirteen focus groups were conducted with a total of 59 clinical professionals involved in UET. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Not applicable. RESULTS: Twenty-eight key HRQOL domains were identified, including physical functioning and medical complications, positive and negative emotional functioning, and social participation, relations, and independence. We identified key constructs for use in evaluation of the potentially substantial physical, medical, social, and emotional effects of UET. CONCLUSIONS: This study provides an overview of the most important issues affecting HRQOL after UET, including several topics that are unique to individuals with UET. This information will be used to establish systematic, comprehensive, and longitudinal measurement of post-UET HRQOL outcomes.


Assuntos
Qualidade de Vida , Extremidade Superior , Humanos , Extremidade Superior/cirurgia , Amputação Cirúrgica , Grupos Focais
3.
Curr Opin Organ Transplant ; 24(6): 714-720, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31577596

RESUMO

PURPOSE OF REVIEW: Vascularized composite allotransplantation (VCA), a life-enhancing treatment for patients with complex tissue defects, trauma or illness, expounds upon the foundation of solid organ transplantation (SOT), the gold standard in end-stage organ failure. As innate and adaptive immunity remain the fundamental concern, this review highlights divergent immunobiology responses in VCA and SOT recipients. RECENT FINDINGS: Host innate immune activation drives peritransplant tissue ischemia-reperfusion injury (IRI). Despite the direct relationship between ischemia-reperfusion (IR)-stress and cell-mediated acute rejection, the mechanism of how IRI may affect VCA loss needs investigation. With skin grafts being highly immunogenic, the incidence of cell-mediated rejection is higher in VCA than SOT; whereas ex-vivo perfusion may exert cytoprotection against IRI in VCA and SOT. New treatment concepts, such as topical immunosuppression or cell-based tolerogenic therapies, may avoid systemic immunosuppression in VCA. Although antibody-mediated rejection is relatively rare in VCA and its disease seems to be distinct from that in SOT, little is known as to whether and how IRI may influence humoral immune rejection cascade in VCA or SOT. SUMMARY: Further understanding of the innate-adaptive immune crosstalk should contribute to much needed development of novel therapies to improve VCA outcomes, based on strategies established in SOT.


Assuntos
Terapia de Imunossupressão/métodos , Transplante de Órgãos/métodos , Humanos , Alotransplante de Tecidos Compostos Vascularizados
4.
Curr Opin Organ Transplant ; 20(2): 121-6, 2015 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-25856175

RESUMO

PURPOSE OF REVIEW: The purpose of this article is to identify the unique aspects of combined multiorgan and vascularized composite allograft (VCA) procurement from deceased donors and outline the steps essential for success. RECENT FINDINGS: Transplantation of nonsolid organ composite tissues is becoming a viable option for reconstruction of massive tissue defects. With the United Network for Organ Sharing designation of VCAs as organs, placing them under the domain of the Organ Procurement and Transplantation Network, a systematic method for combined solid organ and VCA procurement is required. Several centers have reported experience with successful procurement strategies including sequential and simultaneous retrievals. The published literature describing donor screening, sequence of procurement with relation to solid organs and allocation is reviewed. SUMMARY: With the 2013 classification of VCAs as organs, the Organ Procurement and Transplantation Network and United Network for Organ Sharing are better suited to aligning procurement and allocation policies. As VCA transplantation becomes more commonplace, protocol guidelines will ensure smooth integration with existing procurement infrastructure.


Assuntos
Obtenção de Tecidos e Órgãos , Parede Abdominal , Animais , Humanos , Falência Renal Crônica/cirurgia , Transplante de Órgãos , Doadores de Tecidos , Transplante de Tecidos
5.
Transpl Int ; 27(5): 417-27, 2014 May.
Artigo em Inglês | MEDLINE | ID: mdl-24164333

RESUMO

There have been more than 90 hand and upper extremity transplants performed worldwide. Functional and sensory outcomes have been reported in several studies, but little is known about the psychosocial outcomes. A comprehensive systematic literature review was performed, addressing the psychosocial impact of reconstructive hand transplantation. This review provides an overview of psychosocial evaluation protocols and identifies standards in this novel and exciting field. Essentials of the psychosocial assessment are discussed and a new protocol, the 'Chauvet Protocol', representing a standardized assessment protocol for future multicenter psychosocial trials is being introduced.


Assuntos
Transplante de Mão/psicologia , Procedimentos de Cirurgia Plástica/psicologia , Humanos , Qualidade de Vida , Regressão Psicológica
6.
Ann Surg ; 257(2): 345-51, 2013 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-23001085

RESUMO

OBJECTIVE: To minimize maintenance immunosuppression in upper-extremity transplantation to favor the risk-benefit balance of this procedure. BACKGROUND: Despite favorable outcomes, broad clinical application of reconstructive transplantation is limited by the risks and side effects of multidrug immunosuppression. We present our experience with upper-extremity transplantation under a novel, donor bone marrow (BM) cell-based treatment protocol ("Pittsburgh protocol"). METHODS: Between March 2009 and September 2010, 5 patients received a bilateral hand (n = 2), a bilateral hand/forearm (n = 1), or a unilateral (n = 2) hand transplant. Patients were treated with alemtuzumab and methylprednisolone for induction, followed by tacrolimus monotherapy. On day 14, patients received an infusion of donor BM cells isolated from 9 vertebral bodies. Comprehensive follow-up included functional evaluation, imaging, and immunomonitoring. RESULTS: All patients are maintained on tacrolimus monotherapy with trough levels ranging between 4 and 12 ng/mL. Skin rejections were infrequent and reversible. Patients demonstrated sustained improvements in motor function and sensory return correlating with time after transplantation and level of amputation. Side effects included transient increase in serum creatinine, hyperglycemia managed with oral hypoglycemics, minor wound infection, and hyperuricemia but no infections. Immunomonitoring revealed transient moderate levels of donor-specific antibodies, adequate immunocompetence, and no peripheral blood chimerism. Imaging demonstrated patent vessels with only mild luminal narrowing/occlusion in 1 case. Protocol skin biopsies showed absent or minimal perivascular cellular infiltrates. CONCLUSIONS: Our data suggest that this BM cell-based treatment protocol is safe, is well tolerated, and allows upper-extremity transplantation using low-dose tacrolimus monotherapy.


Assuntos
Transplante de Medula Óssea/métodos , Antebraço/cirurgia , Transplante de Mão , Imunossupressores/administração & dosagem , Tacrolimo/administração & dosagem , Adulto , Feminino , Humanos , Tolerância Imunológica , Imunomodulação , Masculino , Adulto Jovem
7.
Ann Plast Surg ; 70(4): 454-6, 2013 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23486126

RESUMO

BACKGROUND: Many surgical options exist for the treatment of Dupuytren contracture. Little has been written regarding their financial implications. The purpose of this study was to compare the immediate direct costs of open fasciectomy to percutaneous needle aponeurotomy (NA) for the surgical treatment of Dupuytren contracture. MATERIALS AND METHODS: A retrospective review was performed comparing patients treated with open fasciectomy (group 1) to patients treated with percutaneous NA (group 2) for the treatment of Dupuytren disease from 2008 to 2010. Financial and medical records were reviewed. Direct cost of treatment was calculated from hospital billing records, including surgical, anesthesia, and facility fees. Statistical analysis was performed using unpaired t test. RESULTS: Twenty-four patients received open segmental palmar and/or digital fasciectomy (group 1). Average preoperative metacarpophalangeal joint flexion contracture was 30 degrees, and proximal interphalangeal joint flexion contracture was 42 degrees. Group 2 consisted of 24 patients. Average preoperative metacarpophalangeal flexion contracture was 31 degrees, and proximal interphalangeal flexion contracture was 27 degrees. Mean cost for group 1 was $11,240 and mean cost for group 2 was $4657 (P < 0.0001). Immediate postoperative contracture correction was similar between both. Two complications occurred in group 1 (wound dehiscence and nerve injury); no complications in group 2. CONCLUSIONS: Percutaneous NA is associated with decreased direct costs in the short-term compared to traditional open fasciectomy with comparable deformity correction.


Assuntos
Contratura de Dupuytren/cirurgia , Fasciotomia , Adulto , Idoso , Idoso de 80 Anos ou mais , Custos e Análise de Custo , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Agulhas , Procedimentos Ortopédicos/economia , Procedimentos Ortopédicos/instrumentação , Procedimentos Ortopédicos/métodos , Estudos Retrospectivos
8.
Ann Plast Surg ; 71(4): 355-60, 2013 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23407249

RESUMO

PURPOSE: The purpose of the study was to assess how context influences range of motion measurements in hand surgery. METHODS: One hundred seventy-five consecutive patients presenting to a hand surgery clinic were evaluated over 7 sessions. Passive and active motion were measured with a goniometer and by visual estimation. The affected joint was measured by 3 different examiners-one hand surgeon and 2 research assistants (RAs). Measurements by the RAs were performed under the pretense of imaginary project titles and purposes. RESULTS: Range of motion measurements were easily influenced. As the invented project's purpose became more specific and dependent on physician intervention, the bias became more pronounced. Measurements performed under construed project titles that promoted surgical intervention garnered outcomes that supported surgery (P < 0.01). Conversely, when the manufactured study's intent was to find support in conservative treatment, this outcome could also be generated (P < 0.01). DISCUSSION: Range of motion measurements can easily be influenced by the context of the study, even in seemingly blinded examiners. Reliable range of motion measurements can only be made when the examiner has no knowledge of the study's intent.


Assuntos
Artrometria Articular/psicologia , Articulação da Mão/fisiologia , Mãos/cirurgia , Avaliação de Resultados em Cuidados de Saúde/métodos , Adulto , Idoso , Idoso de 80 Anos ou mais , Análise de Variância , Artrometria Articular/métodos , Viés , Feminino , Mãos/fisiologia , Articulação da Mão/fisiopatologia , Humanos , Masculino , Pessoa de Meia-Idade , Variações Dependentes do Observador , Estudos Prospectivos , Amplitude de Movimento Articular , Método Simples-Cego
9.
J Wrist Surg ; 12(6): 509-516, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-38213557

RESUMO

Background The distal radius fracture is the most common fracture in the United States. Achieving stable reduction and fixation of complex fracture patterns can be challenging. In order to help maintain reduction of comminuted fracture to simplify plating, the calcium phosphate-based bone putty Montage has been developed. Questions/Purposes Does Montage assist in achieving stable reduction and fixation of complex distal radius fractures with an acceptable complication profile? Patient and Methods We retrospectively analyzed all patients who were treated intraoperatively with Montage bone putty along with volar plate fixation at a large-volume urban county hospital. Preoperative, intraoperative, and postoperative measurements of radiographic features were recorded at 2 and 6 months, as were any complications. Statistical analysis was then performed on these values. Results Preoperative and postoperative radiographs demonstrated significant improvement in standard distal radius fracture measurements, reflecting adequate reduction with the use of Montage intraoperatively. Critically, radiographs demonstrated maintenance of reduction compared to intraoperative fluoroscopy images at 2 months, showing short-term stability of the use of Montage in these fracture patterns as well as long-term stability at 6 months in a subset of patients. There were no major complications in this study. Conclusion In this study, we demonstrate the utility of Montage bone putty for complex distal radius fractures with short-term follow-up and limited long-term follow-up. This initial study underlines its efficacy in maintaining reduction without major complications. Level of Evidence IV, Therapeutic.

10.
J Reconstr Microsurg ; 28(1): 27-34, 2012 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-21811969

RESUMO

The goal of hand allotransplantation is to achieve graft survival and useful long-term function. To achieve these goals, precise surgical technique is of critical importance. The key surgical steps and sequence of events in hand allotransplantation are similar to major upper extremity replantations, but are modified to accommodate major conceptual differences that exist between the two procedures.


Assuntos
Transplante de Mão , Procedimentos de Cirurgia Plástica/métodos , Feminino , Sobrevivência de Enxerto , Mãos/inervação , Humanos , Masculino , Cuidados Pós-Operatórios , Transplante Homólogo
11.
Transplantation ; 105(7): 1502-1509, 2021 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-33208695

RESUMO

BACKGROUND: T lymphocyte-mediated acute rejection is a significant complication following solid organ transplantation. Standard methods of monitoring for acute rejection rely on assessing histological tissue damage but do not define the immunopathogenesis. Additionally, current therapies for rejection broadly blunt cellular immunity, creating a high risk for opportunistic infections. There is, therefore, a need to better understand the process of acute cellular rejection to help develop improved prognostic tests and narrowly targeted therapies. METHODS: Through next-generation sequencing, we characterized and compared the clonal T-cell receptor (TCR) repertoires of graft-infiltrating lymphocytes (GILs) and blood-derived lymphocytes from a hand transplant recipient over 420 days following transplantation. We also tracked the TCR clonal persistence and V beta (BV) gene usage, evaluating overlap between these 2 compartments. RESULTS: TCR repertoires of blood and GIL populations remained distinct throughout the sampling period, and differential BV usage was consistently seen between these compartments. GIL TCR clones persisted over time and were seen in only limited frequency in the blood T-lymphocyte populations. CONCLUSIONS: We demonstrate that blood monitoring of TCR clones does not reveal the pathogenic process of acute cellular rejection in transplanted tissue. GILs show clonal persistence with biased BV usage, suggesting that tissue TCR clonal monitoring could be useful, although a deeper understanding is necessary to prognosticate rejection based on TCR clonal repertoires. Finally, the distinct TCR BV usage bias in GILs raises the possibility for prevention and therapy of acute cellular rejection based on targeting of specific TCR clones.


Assuntos
Genes Codificadores dos Receptores de Linfócitos T , Rejeição de Enxerto/genética , Transplante de Mão , Imunidade Celular , Transplante de Pele , Linfócitos T/imunologia , Rejeição de Enxerto/imunologia , Rejeição de Enxerto/metabolismo , Sobrevivência de Enxerto , Mãos , Transplante de Mão/efeitos adversos , Humanos , Fenômenos Imunogenéticos , Masculino , Pessoa de Meia-Idade , Transplante de Pele/efeitos adversos , Linfócitos T/metabolismo , Fatores de Tempo , Resultado do Tratamento
12.
Ann Plast Surg ; 64(4): 421-7, 2010 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-20224336

RESUMO

Many surgical techniques are available for repairing a lacerated canaliculus, such as, Worst pigtail probing, and monocanalicular or bicanalicular procedures involving silicone intubation. Despite this, controversy still exists regarding the best surgical method in terms of subjective and objective outcomes. We report the experience of microscopic canalicular repair using monocanalicular stents; Monostent (Eagle Vision Inc., Memphis, TN) and Mini-Monoka stents (FCI Ophthalmics, Marshfield Hills, MA) and compare these 2 products. Seventeen cases of canalicular lacerations in 15 consecutive patients underwent microscopic canalicular repair using a monocanalicular procedure with either a Monostent (Eagle Vision Inc.) (5 cases) or a Mini-Monoka stent (FCI Ophthalmics) (12 cases). Microscopic anastomosis of the canalicular mucosa was performed following the placement of a juxta canalicular suture to reduce tension. Subjective and objective flows of repaired lacrimal drainage systems were checked by saline injection using a Healon needle (Advanced Medical Optics, Inc., Santa Ana, CA) and dacryocystogram. Patent lacrimal drainage systems were achieved in 16 of the 17 cases, and mild epiphora was acceptable in 14 patients during follow-up. No cases of spontaneous punctal plug migration, stent displacement, eyeball irritation or inflammation, or granuloma formation were encountered. However, in one case, a Mini-Monoka stent (FCI Ophthalmics) was repeatedly extruded or clogged internally and replaced by Monostent (Eagle Vision Inc.). Although the latter had a larger conduit diameter, it was more flexible and had potentially folded on itself in the lacrimal sac, thus, obstructing flow in this case. Microscopic canalicular reconstruction using a Monostent (Eagle Vision Inc.) or Mini-Monoka stent (FCI Ophthalmics) offers a safe, effective, and straightforward means of acute lacrimal system injury treatment.


Assuntos
Oftalmopatias/cirurgia , Aparelho Lacrimal/lesões , Aparelho Lacrimal/cirurgia , Stents , Adolescente , Adulto , Feminino , Humanos , Masculino , Microcirurgia , Pessoa de Meia-Idade , Procedimentos de Cirurgia Plástica , Adulto Jovem
13.
J Orthop ; 16(6): 596-602, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31708608

RESUMO

BACKGROUND: There are different treatments as well as controversies surrounding the adequate treatment for Distal Radius Fractures (DRF). In the absence of enough evidence[HYPHEN]base data regarding clinical effectiveness of available treatments, cost should be considered as an essential factor in selecting the surgical technique for DRF treatment. The goal of this study is introducing an improved and modified pin[HYPHEN]and[HYPHEN]plaster (MP&P) technique as an affordable alternative for treatment of DRF. This study also assesses and compares the outcomes of DRF treatment by using the introduced method versus external fixation (EF) technique. METHODS: In this clinical cohort study, 98 patients presenting with closed DRF Types III or IV, randomly were classified into two modified P&P (50 patients) and EF (48 patients) groups and assessed for functional, clinical, radiographic and overall outcome at the time, 2, 10 and 22 months after surgery. They were also followed[HYPHEN]up for up to 3 years to determine the rate of complications. RESULTS: Eighty one percent of EF and 86% of MP&P group were female. The average ages in the EF and MP&P groups were 44.9 ± 12.4 and 46.1 ± 5.4, respectively. Around 70% of the patients in each group had a Type III fracture, and 30% had Type IV. The rate of complications was higher among EF group patients (seven major and seven minor complications) compared to the MP&P (only 4 minor complications), however the difference between two groups regarding the complications and treatment outcome were insignificant, except in extension ROM and the quick[HYPHEN]dash score (only in two and four months follow up visits) and also returning to work (only in two month follow up visit). CONCLUSION: This study introduces a modified P&P technique that protects the transverse palmar curvature, prevents the collapse of the distal radius, and simplifies casting, thereby obviating a full arm cast and mitigating elbow stiffness in patient outcomes. This modified technique could be considered as a more cost[HYPHEN]conscious alternative to external fixation for patients with distal radius fractures.

14.
Transplantation ; 103(10): 2173-2182, 2019 10.
Artigo em Inglês | MEDLINE | ID: mdl-30817406

RESUMO

BACKGROUND: Donor-specific antibodies (DSAs) have a strong negative correlation with long-term survival in solid organ transplantation. Although the clinical significance of DSA and antibody-mediated rejection (AMR) in upper extremity transplantation (UET) remains to be established, a growing number of single-center reports indicate their presence and potential clinical impact. METHODS: We present a multicenter study assessing the occurrence and significance of alloantibodies in UET in reference to immunological parameters and functional outcome. RESULTS: Our study revealed a high prevalence and early development of de novo DSA and non-DSA (43%, the majority detected within the first 3 postoperative y). HLA class II mismatch correlated with antibody development, which in turn significantly correlated with the incidence of acute cellular rejection. Cellular rejections preceded antibody development in almost all cases. A strong correlation between DSA and graft survival or function cannot be statistically established at this early stage but a correlation with a lesser outcome seems to emerge. CONCLUSIONS: While the phenotype and true clinical effect of AMR remain to be better defined, the high prevalence of DSA and the correlation with acute rejection highlight the need for optimizing immunosuppression, close monitoring, and the relevance of an HLA class II match in UET recipients.


Assuntos
Rejeição de Enxerto/epidemiologia , Antígenos HLA/imunologia , Transplante de Mão/efeitos adversos , Isoanticorpos/sangue , Isoantígenos/imunologia , Adolescente , Adulto , Idoso , Conjuntos de Dados como Assunto , Feminino , Seguimentos , Rejeição de Enxerto/sangue , Rejeição de Enxerto/diagnóstico , Rejeição de Enxerto/imunologia , Sobrevivência de Enxerto/imunologia , Teste de Histocompatibilidade , Humanos , Isoanticorpos/imunologia , Masculino , Pessoa de Meia-Idade , Prevalência , Doadores de Tecidos , Transplantados , Resultado do Tratamento , Adulto Jovem
16.
Hand (N Y) ; 12(1): 43-49, 2017 01.
Artigo em Inglês | MEDLINE | ID: mdl-28082842

RESUMO

Background: Coincident carpal and cubital tunnel syndromes present a diagnostic challenge, exacerbated by the limitations of nerve conduction study (NCS) for confirming cubital tunnel syndrome. This study develops a diagnostic scoring system, the Koh-Benhaim (KB) score, to identify patients with coincident compression neuropathies. Methods: A retrospective review of 515 patients was performed from patients surgically treated for carpal and/or cubital tunnel release. These patients were divided as patients with isolated carpal tunnel syndrome (n = 337) or coincident carpal and cubital tunnel syndromes (n = 178), then characterized according to demographics, medical history, physical examination, and NCS results. Univariate and multivariate logistic regression identified predictors of coincident neuropathy. A clinical score was constructed by integerizing regression coefficients of predictive factors. Receiver operating characteristic (ROC) curves were generated for each iteration of the score. Sensitivities, specificities, and positive and negative predictive values were calculated to identify the best cutoff value. Results: Decreased intrinsic muscle strength, decreased ulnar sensation, positive elbow flexion test, positive cubital tunnel Tinel's sign, and abnormal NCS result were selected. The cutoff value for high risk of coincident compression was 3 points: positive predictive value, 82.9% and specificity, 93.4%. Model performance was very good-ROC area under the curve of 0.917. Conclusions: A KB score of 3 or greater represents high risk of coincident cubital tunnel compression. The variables involved are routinely used to assess the cubital tunnel, and all component factors of the KB score were of equivalent clinical weight in assessing patients with potential coincident compression neuropathy.


Assuntos
Síndrome do Túnel Carpal/complicações , Síndrome do Túnel Carpal/diagnóstico , Síndrome do Túnel Ulnar/complicações , Síndrome do Túnel Ulnar/diagnóstico , Idoso , Síndrome do Túnel Carpal/fisiopatologia , Síndrome do Túnel Carpal/cirurgia , Síndrome do Túnel Ulnar/fisiopatologia , Síndrome do Túnel Ulnar/cirurgia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Força Muscular/fisiologia , Condução Nervosa/fisiologia , Exame Neurológico/métodos , Exame Físico/métodos , Valor Preditivo dos Testes , Curva ROC , Estudos Retrospectivos , Medição de Risco/métodos , Transtornos de Sensação/etiologia , Transtornos de Sensação/fisiopatologia
17.
Tissue Eng ; 12(11): 3055-65, 2006 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-17518621

RESUMO

Osteoblast biology is influenced in vivo by a 3-dimensional (3D) extracellular matrix that mediates their adhesion and interaction and by a constant state of compressive and tensile forces. To study the role of mechanical stress on osteoblasts in vitro, these parameters must be addressed. Therefore, this study describes the use of a novel, in vitro system that subjects cells to distractive and compressive forces in a 3D environment. This system, termed a microdistractor system, was used to apply linear forces to 3D collagen type I gels containing preosteoblasts. Gels were induced for up to 16 days in osteogenic medium and subjected to either constant linear distraction (distraction gels) or to repeating cycles of distraction and compression (oscillation gels). The effect of these stresses was evaluated over time by measuring proliferation rates, protein synthesis (i.e., cellular activity), and osteogenic differentiation levels. While linear forces in general appeared to increase protein synthesis, force-specific effects on proliferation and differentiation were observed. Specifically, distraction forces appeared to enhance MC3T3 proliferation while distraction/compressive forces appeared to accelerate their osteogenic differentiation program. Therefore, these results suggest that the microdistraction system may be an appropriate in vitro system for the study of mechanobiology in osteoblast phenotype.


Assuntos
Diferenciação Celular/fisiologia , Fibroblastos/fisiologia , Microdissecção/métodos , Osteoblastos/fisiologia , Células 3T3 , Fosfatase Alcalina/metabolismo , Animais , Contagem de Células , Colágeno Tipo I/química , Meios de Cultura/química , Desenho de Equipamento , Fibroblastos/metabolismo , Géis/química , Camundongos , Técnicas de Cultura de Órgãos , Osteoblastos/citologia , Osteogênese/fisiologia , Biossíntese de Proteínas , Estresse Mecânico , Fatores de Tempo
18.
J Bone Joint Surg Am ; 88(7): 1553-65, 2006 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-16818982

RESUMO

BACKGROUND: Treatment of segmental bone loss remains a challenge in skeletal repairs. This study was performed to evaluate the efficacy of the use of recombinant bone morphogenetic protein-2 (rhBMP-2) delivered in an injectable calcium phosphate cement (alpha bone substitute material [alpha-BSM]) to bridge critical-sized defects in the rabbit radius. METHODS: Unilateral 20-mm mid-diaphyseal defects were created in the radii of thirty-six skeletally mature New Zealand White rabbits. The defects in twelve rabbits each were filled with 0.166 mg/mL rhBMP-2/alpha-BSM cement, 0.033 mg/mL rhBMP-2/alpha-BSM cement, or buffer/alpha-BSM cement. Six rabbits from each group were killed at four weeks, and six were killed at eight weeks. Serial radiographs were made to monitor defect-bridging and residual alpha-BSM carrier. A semiquantitative histological scoring system was used to evaluate defect-bridging. Histomorphometry was used to quantify residual alpha-BSM; trabecular bone area; trabecular bone volume fraction; and cortical length, width, and area. RESULTS: At four weeks, there had been more rapid resorption of alpha-BSM and filling of the defects with trabecular bone in the group treated with 0.166 mg/mL rhBMP-2/alpha-BSM than in the other two groups. Histomorphometry confirmed an increased trabecular area and volume fraction in this group compared with the other two groups. In both rhBMP-2/alpha-BSM-treated groups, the majority of the trabecular bone was formed by a direct process adjacent to the resorbing alpha-BSM. At eight weeks, complete cortical bridging and regeneration of the marrow space were present in all of the defects treated with 0.166 mg/mL rhBMP-2/alpha-BSM. That group also had reduced residual alpha-BSM and trabecular area and volume, compared with the other two groups, at eight weeks as a result of a rapid remodeling process. CONCLUSIONS: Treatment of a critical-sized defect in a rabbit radius with 0.166 mg/mL rhBMP-2/alpha-BSM injectable cement can result in bridging with cortical bone and a regenerated bone-marrow space by eight weeks. Site-specific remodeling appears to be responsible for corticalization and marrow regeneration. CLINICAL RELEVANCE: RhBMP-2 delivered in a calcium phosphate cement may be useful to achieve bridging of critical-sized defects in patients. Its injectable properties may allow minimally invasive use. Delayed percutaneous administration would also be possible when augmentation is desired following an initial surgical procedure or when soft-tissue injuries preclude adequate initial treatment.


Assuntos
Cimentos Ósseos , Proteínas Morfogenéticas Ósseas/administração & dosagem , Regeneração Óssea/efeitos dos fármacos , Substitutos Ósseos/administração & dosagem , Osteólise/terapia , Rádio (Anatomia) , Proteínas Recombinantes/administração & dosagem , Fator de Crescimento Transformador beta/administração & dosagem , Animais , Proteína Morfogenética Óssea 2 , Fosfatos de Cálcio/administração & dosagem , Modelos Animais de Doenças , Osteólise/diagnóstico por imagem , Osteólise/patologia , Coelhos , Radiografia
19.
J Hand Microsurg ; 8(3): 127-133, 2016 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-28018057

RESUMO

Background The outcomes of treating severe wrist injuries are not well understood and despite their complexity and prevalence, particularly among young adults, spaghetti wrist is rarely investigated. The aim of this study is to evaluate the postsurgery, functional outcome of spaghetti wrist injuries. Material and Methods In this prospective cross-sectional study, 153 patients with spaghetti wrist injuries were followed up for approximately 20 months and were assessed regarding returning to work and postsurgical functional outcomes that included tendon functionality, opposition, intrinsic function, deformity, sensation, and grip strength. Results The mean age was 28.3 ± 5 years. The most common cause of injury was glass window panes and bottles. Moreover, the most commonly involved structures were the tendons of flexor digitorum superficialis 3, 4, and 5. During the follow-up, the tendon functionality in 120 (78%), opposition in 115 (75.1%), and intrinsic function in 62 (40.5%) were "excellent." Hand sensation was "fair" in 75 patients (49.1%), "good" in 46 patients (30%), and "excellent" in 28 patients (18.3%). The average return time to activities of daily living was 10 months. Conclusion In this study, worse outcomes were seen in older patients and those with higher number of damaged structures (especially nerves).

20.
Burns ; 42(4): 783-9, 2016 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-26947978

RESUMO

This works aim is to evaluate the efficacy of skin grafts and flaps in reconstruction of post-burn hand and wrist deformities. A prospective study of 57 burn contractures of the wrist and dorsum of the hand was performed. Flaps were used only if there was a non-vascularized structure after contracture release, otherwise a skin graft was used. Active range of motion (ROM) was used to assess hand function. The extension deformity cohort uniformly underwent skin graft following contracture release with a mean improvement of 71 degrees (p<0.0001). The flexion deformity cohort was treated with either skin grafts (8 patients) or flaps (9 patients) with a mean improvement of 44 degrees (p<0.0001). Skin grafts suffice for dorsal hand contractures to restore functional wrist ROM. For flexion contractures, flaps were more likely for contractures >6 months. Early release of burn contracture is advisable to avoid deep structure contracture.


Assuntos
Contratura/cirurgia , Deformidades Adquiridas da Mão/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Amplitude de Movimento Articular , Transplante de Pele/métodos , Retalhos Cirúrgicos , Adolescente , Adulto , Fios Ortopédicos , Queimaduras/complicações , Criança , Pré-Escolar , Contratura/etiologia , Feminino , Deformidades Adquiridas da Mão/etiologia , Traumatismos da Mão/complicações , Humanos , Masculino , Articulação Metatarsofalângica , Pessoa de Meia-Idade , Estudos Prospectivos , Resultado do Tratamento , Traumatismos do Punho/complicações , Articulação do Punho , Adulto Jovem
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