• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 33
  • 18
  • 9
  • 3
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 71
  • 71
  • 30
  • 30
  • 13
  • 12
  • 10
  • 8
  • 8
  • 7
  • 7
  • 7
  • 6
  • 6
  • 6
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Avaliação da expressão gênica de marcadores inflamatórios em células mononucleares de pacientes com trombose venosa profunda / Evaluation of the genetic expression of inflammatory mediators in mononuclear cells from deep venous thrombosis patients

Bassora, Fernanda Dutra Santiago, 1982- 21 August 2018 (has links)
Orientador: Joyce Maria Annichino Bizzacchi / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas / Made available in DSpace on 2018-08-21T17:55:26Z (GMT). No. of bitstreams: 1 Bassora_FernandaDutraSantiago_D.pdf: 2667928 bytes, checksum: 612538a2c5c4e4e33577d2303de3a9c1 (MD5) Previous issue date: 2012 / Resumo: A trombose venosa é definida como a oclusão de um vaso do sistema venoso. Três fatores básicos para a formação de um trombo no interior dos vasos são: alteração do fluxo sangüíneo, da parede vascular e/ou dos elementos sangüíneos. A trombose venosa e a embolia pulmonar, que ocorre como uma complicação subseqüente representa uma causa importante de morbidade e mortalidade em pacientes hospitalizados. A freqüência da trombose venosa foi estimada em aproximadamente 1/1000 na população em geral. Na maior parte dos casos existe uma tendência para trombose determinada pela presença de um fator causal herdado ou adquirida, ou pela interação desses fatores, bem como por variações genéticas que determinam alterações nos níveis das proteínas pró-coagulantes e anticoagulantes. Dados da literatura têm sugerido a associação de mecanismos inflamatórios com a fisiopatologia da trombose venosa profunda (TVP). Os monócitos, estimulados por citocinas ou endotoxinas, expressam fator tecidual, o maior indutor da coagulação sangüínea, e que também tem a função de sinalização para a mobilidade celular e vascular. Os leucócitos apresentam receptores capazes de ligar e ativar o fator X da coagulação, servindo como via alternativa para a formação de trombina. As plaquetas podem aderir ao endotélio intacto e através da liberação de mediadores e citocinas como interleucina (IL)-1 e Fator de necrose tumoral-a (TNF-a), induzindo a expressão de moléculas de adesão e fator tecidual pela célula endotelial. Com base nestes dados e considerando que a migração leucocitária é um dos principais eventos que caracterizam o processo inflamatório, justificamos a escolha de células mononucleares (monócitos e linfócitos) como células centrais do nosso estudo. Utilizando técnicas de separação de células mononucleares por centrifugação em gradiente de "Ficoll-Hypaque", extração do Ácido ribonucléico (RNA) total, hibridação em Ácido desoxiribonucléico complementar (cDNA) -Microarray, e validação usando a reação em cadeia da polimerase em tempo real quantitativo (qRT-PCR) avaliamos do perfil de expressão gênica de alguns mediadores inflamatórios nessas células e a possível relação com a trombose venosa. Neste trabalho, usando a tecnologia de Microarray encontramos 60 induzidos e 56 genes reprimidos diferencialmente expressos nos pacientes com TVP, estes genes que estavam relacionados à resposta imune, inflamação, proteólise e transcrição. Destes genes diferencialmente expressos, selecionamos nove relacionados com inflamação para validação usando a técnica de qRT-PCR. Destes, somente houve aumento de expressão do gene da caspase 4 (CASP4) nos pacientes com TVP, sendo que, esta diferença se manteve no subgrupo com TVP espontâneo. Neste mesmo subgrupo, também foi verificado o aumento da expressão no gene Elong factor 1, alpha 2(EEF1A2) / Abstract: Venous thrombosis is defined as a vessel occlusion of the venous system. Three basic factors for the formation of a thrombus inside the vessel are: changes in blood flow, vascular wall and / or blood elements. Venous thrombosis and pulmonary embolism, which occurs as a subsequent complication is a major cause of morbidity and mortality in hospitalized patients. The frequency of venous thrombosis was estimated to be approximately 1 / 1000 in the general population. In most cases there is a tendency for thrombosis determined by the presence of a causal factor inherited or acquired, or by the interaction of these factors, as well as genetic variations that determine changes in protein levels of procoagulants and anticoagulants. Literature data have suggested the association of inflammatory mechanisms in the pathophysiology of deep venous thrombosis (DVT). Monocytes, stimulated by cytokines or endotoxin, express tissue factor, the greater inducer of blood coagulation, and also have the function of signaling for cell motility and vascular. Leukocytes have receptors that can bind and activate coagulation factor X, serving as an alternative route for the formation of thrombin. Platelets can adhere to intact endothelium and through the release of mediators and cytokines such as interleukin (IL)-1 and Tumor necrosis factor-a (TNF-a), inducing expression of adhesion molecules and tissue factor by endothelial cells. Based on these data and considering that leukocyte migration is one of the main events that characterize the inflammatory process, we justify the choice of mononuclear cells (monocytes and lymphocytes) as the central cells of our study. Using techniques of separation of mononuclear cells by gradient centrifugation "Ficoll-Hypaque," extraction of total RNA, cDNA-Microarray hybridization, and validation using real time qPCR assessed the gene expression profile of some inflammatory mediators in these cells and the possible relationship with venous thrombosis. In this work using Microarray technology we found 60 genes upregulated and 56 downrelated differentially expressed in patients with DVT. Genes that were related to immune response, inflammation, proteolysis and transcription. Of these differentially expressed genes, we selected nine genes that were related with inflammation to validation using qRT- PCR technique. Just one of then, the caspase 4 (CASP4) genes was differentially increased in DVT patients, this increase kept in patients with spontaneous DVT and an increased of Elong factor 1, alpha 2 (EEF1A2) gene too / Doutorado / Ciencias Biomedicas / Doutora em Ciências Médicas
32

Identificação de proteínas diferencialmente expressas em pacientes com trombose venosa profunda / Identification of differently expressed proteins in deep venous thrombosis patients

Flores-Nascimento, Mariane Cristina, 1979- 20 August 2018 (has links)
Orientador: Joyce Maria Annichino-Bizzacchi / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas / Made available in DSpace on 2018-08-20T22:19:23Z (GMT). No. of bitstreams: 1 Flores-Nascimento_MarianeCristina_D.pdf: 2045016 bytes, checksum: 26506f3c6c426ff227cd481188662275 (MD5) Previous issue date: 2011 / Resumo: A trombose venosa profunda (TVP) é uma doença multifactorial, e possui uma alta taxa de morbi-mortalidade devido a complicações como embolia pulmonar e a síndrome póstrombótica, e cerca de 25 % dos pacientes apresentarão recorrência em 5 anos. A identificação de novos fatores envolvidos na fisiopatologia da TVP pode ser convertida em implicações de grande importância no manejo destes pacientes, prevenção de recorrência e no desenvolvimento de novas terapias. O interesse em avaliar as plaquetas e as amostras de plasma se deve ao fato de que as funções plaquetárias não estão completamente compreendidas, e aparentemente o papel das plaquetas poderia ir além do seu envolvimento na hemostasia. Como o plasma potencialmente fornece uma janela para a observação do indivíduo como um todo, a análise proteômica tanto das plaquetas como do plasma poderia implementar o nosso conhecimento acerca da fisiopatologia da TVP. OBJETIVO: Neste estudo foram analisados os perfis proteicos de plaquetas e amostras de plasma de três pacientes com TVP, que foram comparados com os resultados obtidos a partir de amostras de 1 irmão e 1 vizinho para cada paciente, a fim de minimizar as interferências genéticas e ambientais. Estes pacientes apresentaram episódios espontâneos e recorrentes de TVP proximal e mencionaram um histórico familiar de distúrbios da coagulação. MÉTODOS: as plaquetas necessitaram ser lavadas e lisadas, e as amostras de plasmas tiveram a albumina depletada antes de as proteínas serem alquiladas, reduzidas, precipitadas com acetona e hidrolisadas com tripsina. Os peptídeos das plaquetas e das amostras de plasma foram fracionados por cromatografia de fase reversa e troca catiônica, respectivamente. Depois disto, os peptídeos plaquetários foram direcionados ao espectrômetro de massas LTQOrbitrap e a busca das proteínas foi realizadas através do Sorcerer/Sequest. Os peptídeos plasmáticos foram encaminhados ao espectrômetro de massas ESI Q-TOF Premier e as proteínas foram analisadas pelo Mascot. RESULTADOS: Cinco proteínas estiveram presentes apenas nas plaquetas dos pacientes, estando ausentes em todos os controles: a proteína ligante da Apolipoproteína A1, a sub-unidade ?1 do Coatômero, a Desidrogenase 11-17-? do Estradiol, a Leucotrieno A-4 Hidrolase e a Sorbitol Desidrogenase. Além disso, verificou-se que outras proteínas estiveram diferencialmente expressas em amostras de plasma pacientes e controles: a protease C4-A, o inibidor C1 da Inter-?-Tripsina, o inibidor H1 de cadeia pesada, a proteína Amilóide Sérica A, a glicoproteína ?-2-HS, a isoforma 2 da inter- ?-tripsina, a apolipoproteína A-IV e o inibidor de cadeia pesada H4. CONCLUSÕES: A avaliação de plaquetas e amostras de plasma de pacientes com TVP espontânea permitiu a identificação de proteínas diferencialmente expressas quando comparados a irmãos e vizinhos, que podem desempenhar importantes papéis na fisiopatologia da doença por se relacionarem a processos inflamatórios, imunes e no de transporte de lipídeos / Abstract: Deep venous thrombosis (DVT) is multi-causal disease associated to a high morbimortality due to complications as pulmonary embolism and post-flebitic syndrome, and about 25 % of the patients present recurrence in 5 years. The identification of new factors involved to the physiopathology of DVT can be translated into important implications for the management of these patients, prevention of recurrence, and for the development of new therapies. We were interested about platelets and plasma because the platelets functions are not completely understood and apparently their role goes beyond a hemostatic player, and as the plasma potentially provides a window into the individual's state of health and disease, both could improve our knowledge about the DVT physiopathology. AIM: In this study we analyzed the protein profile of platelets and samples of plasma of 3 DVT patients and compared to results obtained from 1 sibling and 1 neighbor for each patient in order to minimize the genetic and environmental interferences. These patients presented spontaneous and recurrent episodes of proximal DVT and mentioned a familiar history of coagulation disorders. METHODS: the platelets needed to be washed and lysed, and the plasmas samples required albumin depletion before the proteins being alkylated, reduced, precipitated with acetone and hydrolyzed by trypsin. The peptides were fractionated by reverse phase and cation exchange liquid chromatography for platelets and plasmas samples, respectively. After that, the platelets peptides were directed to LTQ-Orbitrap mass spectrometer and the proteins search were performed by Sorcerer/Sequest. The plasma peptides went to ESI Q-TOF Premier mass spectrometer and the proteins were searched by RESULTS: We identified 5 proteins that were present on platelets from patients and absent in all the controls: Apolipoprotein A1 Binding-Protein, Coatomer (?1 sub-unit), Estradiol 11-17-? Dehydrogenase, Leukotriene A-4 Hydrolase and Sorbitol Dehydrogenase. In addition, we verified 6 proteins that were differently expressed between patients and controls: C4-A plasma protease, C1 inhibitor Inter-alpha-trypsin, inhibitor heavy chain H1, the serum amyloid A, alpha-2-HS-glycoprotein, isoform 2 of inter-alphatrypsin, apolipoprotein A-IV and the inhibitor heavy chain H4. CONCLUSIONS: The evaluation of platelets and plasma samples from patients with spontaneous DVT allows the identification of proteins that are differently expressed when compared to siblings and neighbors, which can play important roles on the physiopathology of the disease due their relation to inflammatory, immune and lipid transportation / Doutorado / Biologia Estrutural, Celular, Molecular e do Desenvolvimento / Doutor em Fisiopatologia Medica
33

Right Atrial Myxoma With Extracardiac Manifestations

McCoskey, Eugene H., Mehta, Jayant B., Krishnan, K., Roy, Thomas M. 01 January 2000 (has links)
Right atrial myxoma is a rare intracardiac tumor that is often difficult to diagnose. Pulmonary embolism from tumor fragments originating from the tumor mass is a potentially fatal complication. Early diagnosis of cardiac myxoma is important since surgical treatment leads to resolution with low rates of recurrence and good long-term survival. The presence of a cardiac myxoma can be heralded by nonspecific constitutional symptoms as well as by disturbances in the clotting mechanism.
34

Iatrogenic Pseudoaneurysm: An Uncommon Cause of Deep Vein Thrombosis

Khalid, Muhammad, Murtaza, Ghulam, Kanaa, Majd, Ramu, Vijay 27 March 2018 (has links)
Femoral artery pseudoaneurysm (FAP) is a common complication associated with left heart cardiac catheterization. FAP is a pulsatile encapsulated mass usually formed three to seven days after removal of the arterial sheath post cardiac catheterization. Usually, FAP is asymptomatic. Groin pain and swelling are the most common complaints in symptomatic patients. It can be associated with multiple different complications including rupture, bleeding, and vascular compression leading to venous thrombosis, limb ischemia, and neuropathy. Deep vein thrombosis (DVT) resulting from FAP is an unusual complication with very few cases reported in the literature. We present a case of right-sided DVT secondary to the compression of femoral vein resulting in venous outflow obstruction due to iatrogenic FAP post cardiac catheterization that was successfully managed conservatively.
35

Higher Volume Hypertonic Saline and Increased Thrombotic Risk Without Improved Survival in Pediatric Traumatic Brain Injury

Webster, Danielle L., M.D. 13 October 2014 (has links)
No description available.
36

A Population-Based Perspective on Clinically Recognized Venous Thromboembolism: Contemporary Trends in Clinical Epidemiology and Risk Assessment of Recurrent Events: A Dissertation

Huang, Wei 05 November 2014 (has links)
Background: Venous thromboembolism (VTE), comprising the conditions of deep vein thrombosis (DVT) and pulmonary embolism (PE), is a common acute cardiovascular event associated with increased long-term morbidity, functional disability, all-cause mortality, and high rates of recurrence. Major advances in identification, prophylaxis, and treatment over the past 3-decades have likely changed its clinical epidemiology. However, there are little published data describing contemporary, population-based, trends in VTE prevention and management. Objectives: To examine recent trends in the epidemiology of clinically recognized VTE and assess the risk of recurrence after a first acute episode of VTE. Methods: We used population-based surveillance to monitor trends in acute VTE among residents of the Worcester, Massachusetts, metropolitan statistical area (WMSA) from 1985 through 2009, including in-hospital and ambulatory settings. Results: Among 5,025 WMSA residents diagnosed with acute PE and/or lower-extremity DVT between 1985 and 2009 (mean age = 65 years), 46% were men and 95% were white. Age- and sex-adjusted annual event rates (per 100, 000) of clinically recognized acute first-time and recurrent VTE was 142 overall, increasing from 112 in 1985/86 to 168 in 2009, due primarily to increases in PE occurrence. During this period, non-invasive diagnostic VTE testing increased, vi while treatment shifted from the in-hospital (chiefly with warfarin and unfractionated heparin) to out-patient setting (chiefly with low-molecular-weight heparins and newer anticoagulants). Among those with community-presenting first-time VTE, subsequent 3-year cumulative event rates of key outcomes decreased from 1999 to 2009, including all-cause mortality (41% to 26%), major bleeding episodes (12% to 6%), and recurrent VTE (17% to 9%). Active-cancer (with or without chemotherapy), a hypercoagulable state, varicose vein stripping, and Inferior vena cava filter placement were independent predictors of recurrence during short- (3-month) and long-term (3-year) follow-up after a first acute episode of VTE. We developed risk score calculators for VTE recurrence based on a 3-month prognostic model for all patients and separately for patients without active cancer. Conclusions: Despite advances in identification, prophylaxis, and treatment between 1985 and 2009, the disease burden from VTE in residents of central Massachusetts remains high, with increasing annual events. Declines in the frequency of major adverse outcomes between 1999 and 2009 were reassuring. Still, mortality, major bleeding, and recurrence rates remained high, suggesting opportunities for improved prevention and treatment. Clinicians may be able to use the identified predictors of recurrence and risk score calculators to estimate the risk of VTE recurrence and tailor outpatient treatments to individual patients.
37

Axillary vein thrombosis induced by an increasingly popular oscillating dumbbell exercise device: a case report

Shennib, H., Hickle, K., Bowles, B. January 2015 (has links)
A 53 year-old male presented with a one-day history of a swollen arm and dull, aching pain in the right upper extremity. The patient reported commencing exercising daily over the prior week with a modified, oscillating dumbbell; commonly referred to as a Shake Weight. Imaging revealed an occlusive thrombus in the right axillary, proximal brachial and basilic veins. The patient was treated with a 24-hour tPA infusion followed by mechanical thrombectomy, balloon angioplasty, and stent placement for a residual thrombus and stenosis. The patient was discharged the following day on warfarin and aspirin. This is the first report of effort-induced thrombosis of the upper extremity following the use of a modified, oscillating dumbbell. Due to the growing popularity of modified dumbbells and the possible risk for axillary vein thrombosis, consideration should be made to caution consumers of this potential complication.
38

Incidência de trombose venosa profunda pós-operatória no membro amputado de pacientes com doença arterial oclusiva periférica / Incidence of postoperative deep venous thrombosis in amputated lower extremity of patients with peripheral arterial disease

Matielo, Marcelo Fernando 02 December 2008 (has links)
Introdução: Pacientes submetidos à amputação de membro inferior por doença arterial obstrutiva periférica (DAOP) estão em risco para o desenvolvimento de trombose venosa profunda (TVP). Há poucos estudos na literatura sobre a incidência no pós-operatório precoce e quanto aos fatores de risco no desenvolvimento da TVP no membro amputado. Objetivo: A finalidade deste estudo é avaliar, de modo prospectivo, a incidência de trombose venosa profunda pós-operatória em até 35 dias, em pacientes submetidos à amputação de membro inferior por doença arterial obstrutiva periférica, sua relação com comorbidades e com óbito. Método: De setembro de 2004 a março de 2006, foram estudados 56 pacientes (29 homens; média de idade 67,25 anos) submetidos a 62 amputações (36 transtibiais e 26 transfemorais), utilizando-se eco-Doppler no pré-operatório e aproximadamente no 7º e 31° dia de pós-operatório. Resultado: Houve TVP em 16 (25,8%) membros amputados, sendo 10 casos em amputações transfemorais e 6 casos em transtibiais. A incidência cumulativa no período até 35 dias foi de 28% (Kaplan-Meier). Houve diferença significativa na incidência de TVP entre amputações transfemorais (37,5%) e transtibiais (21,2%), p = 0,04. Outro fator de risco para TVP foi idade igual ou superior a 70 anos (48,9 vs 16,8%, p=0,021). Houve 01 caso de embolia pulmonar sintomática não fatal em paciente com TVP já diagnosticada. Não houve relação entre outras comorbidades e TVP. A trombose venosa no membro amputado não influenciou na taxa de óbito que foi de 9,7%. Conclusões: A incidência de TVP no pós-operatório recente (até 35 dias) foi elevada principalmente em pacientes com idade igual e superior a 70 anos e nas amputações transfemorais. Os pacientes com DAOP submetidos a grandes amputações devem ser considerados de alto risco para TVP, mesmo após alta hospitalar. / Introduction: Patients undergoing amputation of the lower limb due to Peripheral Arterial Disease (PAD) are at risk for developing Deep Venous Thrombosis (DVT). There are few studies in the research literature on the incidence of DVT during the early postoperative period and the risk factors for the development of DVT in the amputation stump. Objective: The goal of this prospective study was to evaluate the incidence of deep venous thrombosis during the first 35 postoperative days in patients who had undergone amputation of the lower extremity due to PAD, and its relation to comorbidities and death. Method: From September 2004 to March 2006, fifty-six patients (29 men, mean age 67.25 years) underwent 62 amputations (36 below knee amputation BKA and 26 above knee amputation- AKA), and echo- Doppler scanning on preoperative, and approximately the seventh and 31st postoperative days. Results: DVT occurred in 16 (25.8%) of the amputated extremities, (10 AKA and 06 BKA). The cumulative incidence in the 35 day postoperative period was 28% (Kaplan-Meier). There was a significant difference in the incidence of DVT between AKA (37.5%) and BKA (21.2%), p = .04. Another DVT risk factor was age equal to or above 70 years (48.9 vs. 16.8%, p= .021). There was one case of symptomatic non-fatal pulmonary embolism in a patient already diagnosed with DVT. There was no relation between other comorbidities and DVT. Venous Thrombosis in the amputation stump did not influence the mortality rate which was 9.7%. Conclusions: The incidence of DVT in the early post-operative period (up to 35 days) was elevated mainly in patients 70 years of age or older and in AKA. Patients with PAD who have recently undergone major amputations should be considered at high risk for DVT, even after hospital discharge.
39

"Fibrinogênio como marcador de trombose" / Fibrinogen in the prediction of thrombosis

Almeida, Maria Antônia Campos 25 May 2006 (has links)
INTRODUÇÃO: Um grande número de estudos epidemiológicos têm demonstrado que o fibrinogênio é fator de risco consistente e independente para doença cardiovascular. O fibrinogênio, além de ser um determinante de trombose arterial foi considerado fator de risco de trombose venosa. Foram avaliados os níveis plasmáticos do fibrinogênio em indivíduos que apresentaram algum tipo de trombose não influenciada por reação de fase aguda ou resposta inflamatória. MÉTODOS: Neste estudo de caso-controle realizado entre julho de 2003 a abril de 2005 foram incluídos 39 pacientes, entre 25 e 65 anos, com diagnóstico objetivamente confirmado de trombose, sem antecedentes de neoplasia e colagenose. O tempo mínimo entre a evento e a coleta da amostra de sangue foi de 6 meses. O grupo controle foi constituído de doadores e funcionários voluntários do Hemocentro Regional de Juiz de Fora. A concentração plasmática de fibrinogênio e a medida da Proteína C Reativa foram realizados nos dois grupos. RESULTADOS:Os níveis médios de fibrinogênio foram significativamente maiores nos pacientes ( 316)que no grupo controle (259), p=0,0002. a média de idade foi 48,3 para os pacientes e 45,5 para o controle. A aplicação do teste qui quadrado demonstrou que não houve diferenças significativas nos grupos de pacientes e controles (30,8% e 27%, respectivamente) em relação ao tabagismo(pvalor = 0,72). A frequência de hipertensão foi significativamente maior no grupo de pacientes (28,2%) que no controle (5,4%) (p-valor=0,008). O teste t para a diferença dos níveis médios de fibrinogênio entre os grupos de trombose venosa e arterial não apresentou resultado estatisticamente significante (p-valor = 0,69). CONCLUSÃO: Com base nos dados deste estudo, os níveis de fibrinogênio estão relacionados com trombose, independente se arterial ou venosa. / INTRODUCTION: A great number of prospective epidemiologic studies have reported that fibrinogen is consistently and independently risk factor for the cardiovascular disease. The fibrinogen, a determinant of arterial thrombosis, was also considered a risk factor for the venous thrombosis. It was valued the fibrinogen plasmatic level in patients that had showed some kind of thrombosis event without influence by acute phase reactions or ongoing inflamatory responses. METHODS: In this cases-control study, fulfilled between july 2003 and april 2005, was included 39 patients, among 25 e 65 ears, with confirmed diagnosis of thrombosis and none neoplasis and collagenosis antecedent. Six months was the minimum time between event and blood sample collect. The control group was composed by blood donor and voluntary employee of the Hemocentro Regional de Juiz de Fora. The fibrinogen plasmatic concentration and the C-reactive proteins measure was made in both groups. RESULTS: The medium levels of fibrinogen were significantly higher in patients (316) than the control group (259), p=0,0002. The age average was 48,3 for the patients and 45,5 for the control. The “qui-quadrado" test application proved there wasn’t any significatives differences in both groups, patients (30,8%) and control (27%), in the relation with smoking (p-value = 0,72). The frequency of arterial hypertension was significantly higher in patient group (28,2%) than the control group (5,4%) (p-value = 0,008). The t-test for the differences of the fibrinogen average levels between venous and arterial thrombosis didn’t present any significant statistic result. CONCLUSION: Established in this research, the higher levels of fibrinogen are associated with thrombosis, independently if arterial or venous.
40

Incidência de trombose venosa profunda pós-operatória no membro amputado de pacientes com doença arterial oclusiva periférica / Incidence of postoperative deep venous thrombosis in amputated lower extremity of patients with peripheral arterial disease

Marcelo Fernando Matielo 02 December 2008 (has links)
Introdução: Pacientes submetidos à amputação de membro inferior por doença arterial obstrutiva periférica (DAOP) estão em risco para o desenvolvimento de trombose venosa profunda (TVP). Há poucos estudos na literatura sobre a incidência no pós-operatório precoce e quanto aos fatores de risco no desenvolvimento da TVP no membro amputado. Objetivo: A finalidade deste estudo é avaliar, de modo prospectivo, a incidência de trombose venosa profunda pós-operatória em até 35 dias, em pacientes submetidos à amputação de membro inferior por doença arterial obstrutiva periférica, sua relação com comorbidades e com óbito. Método: De setembro de 2004 a março de 2006, foram estudados 56 pacientes (29 homens; média de idade 67,25 anos) submetidos a 62 amputações (36 transtibiais e 26 transfemorais), utilizando-se eco-Doppler no pré-operatório e aproximadamente no 7º e 31° dia de pós-operatório. Resultado: Houve TVP em 16 (25,8%) membros amputados, sendo 10 casos em amputações transfemorais e 6 casos em transtibiais. A incidência cumulativa no período até 35 dias foi de 28% (Kaplan-Meier). Houve diferença significativa na incidência de TVP entre amputações transfemorais (37,5%) e transtibiais (21,2%), p = 0,04. Outro fator de risco para TVP foi idade igual ou superior a 70 anos (48,9 vs 16,8%, p=0,021). Houve 01 caso de embolia pulmonar sintomática não fatal em paciente com TVP já diagnosticada. Não houve relação entre outras comorbidades e TVP. A trombose venosa no membro amputado não influenciou na taxa de óbito que foi de 9,7%. Conclusões: A incidência de TVP no pós-operatório recente (até 35 dias) foi elevada principalmente em pacientes com idade igual e superior a 70 anos e nas amputações transfemorais. Os pacientes com DAOP submetidos a grandes amputações devem ser considerados de alto risco para TVP, mesmo após alta hospitalar. / Introduction: Patients undergoing amputation of the lower limb due to Peripheral Arterial Disease (PAD) are at risk for developing Deep Venous Thrombosis (DVT). There are few studies in the research literature on the incidence of DVT during the early postoperative period and the risk factors for the development of DVT in the amputation stump. Objective: The goal of this prospective study was to evaluate the incidence of deep venous thrombosis during the first 35 postoperative days in patients who had undergone amputation of the lower extremity due to PAD, and its relation to comorbidities and death. Method: From September 2004 to March 2006, fifty-six patients (29 men, mean age 67.25 years) underwent 62 amputations (36 below knee amputation BKA and 26 above knee amputation- AKA), and echo- Doppler scanning on preoperative, and approximately the seventh and 31st postoperative days. Results: DVT occurred in 16 (25.8%) of the amputated extremities, (10 AKA and 06 BKA). The cumulative incidence in the 35 day postoperative period was 28% (Kaplan-Meier). There was a significant difference in the incidence of DVT between AKA (37.5%) and BKA (21.2%), p = .04. Another DVT risk factor was age equal to or above 70 years (48.9 vs. 16.8%, p= .021). There was one case of symptomatic non-fatal pulmonary embolism in a patient already diagnosed with DVT. There was no relation between other comorbidities and DVT. Venous Thrombosis in the amputation stump did not influence the mortality rate which was 9.7%. Conclusions: The incidence of DVT in the early post-operative period (up to 35 days) was elevated mainly in patients 70 years of age or older and in AKA. Patients with PAD who have recently undergone major amputations should be considered at high risk for DVT, even after hospital discharge.

Page generated in 0.0758 seconds