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  • 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.
21

Perfil clínico-radiológico de um grupo de pacientes com AVC isquêmico cardioembólico atendidos em um centro de referência de emergências cerebrovasculares

Sousa, Fabrício Bergelt de January 2015 (has links)
Introdução:embora seja mundialmente conhecida a correlação entre os escores tomográficos de avaliação isquêmica cerebral com achados e desfechos clínicos em pacientes com acidente vascular cerebral (AVC) isquêmico, são limitadas as evidencias em pacientes do subtipo cardioembólico. Objetivo: avaliar e correlacionar o perfil e desfechos clínicos de pacientes com AVC isquêmico do subtipo cardioembólico com os achados tomográficos de isquemia, segundo escores tomográficos. Métodos:estudo retrospectivo de um grupo de pacientes com AVC do tipo cardioembólico segundo a classificação TOAST, selecionados através de uma amostra de conveniência dos pacientes que foram atendidos em um centro de referência de emergências cerebrovasculares (março de 2014 a março de 2015). Os exames tomográficos destes pacientes foram avaliados por dois observadores (um radiologista com 10 anos e outro com 2 anos de experiência em exames tomográficos) treinados na avaliação de escores tomográficos relacionados a alterações isquêmicas encefálicas e cegados para os dados clínicos e laboratoriais dos pacientes. A análise estatística correlacionou os achados clínicos que incuíram fatores e preditores de risco, bem como transformação hemorrágica com os escores tomográficos que avaliam a isquemia cerebral. Resultados:o grupo com escore ASPECTS ≤7 apresentou significativamente maior uso de antiarrítmico, exclusão de trombólise, maior NIHSS, escala Rankin em 24h mais elevada e mais dias de internação quando comparado ao ASPECTS >7. Os pacientes com transformação hemorrágica apresentaram proporção significativamente maior de escore ASPECTS ≤ 7, mais do que um terço de acometimento do território da artéria cerebral média e AVC maior considerado pelo escore BASIS. Conclusão:os pacientes avaliados com AVC isquêmico cardioembólico que apresentaram transformação hemorrágica têm valores piores nos escores tomográficos de isquemia, com NHISS mais elevado e maior número de dias de internação. Houve uma correlação positiva entre o escore ASPECTS e os escores tomográficos regra de um terço e BASIS. / Introduction: although known worldwide, the correlation between tomographic cerebral ischemia evaluation scores and clinical outcome in patients with ischemic cerebral vascular accident (CVA), the evidences on patients with cardioembolic subtype are limited. Objective: evaluate and correlate the profile and clinical outcomes of patients with embolic subtype ischemic CVA with ischemia tomographic findings, according to tomographic scores. Methods: retrospective study of a patients group with cardioembolic subtype CVA according to TOAST classification, selected through a convenience sample from the patients that were treated at the cerebral vascular disease reference center emergency, (March 2014 to March 2015). These patients tomographic exams were evaluated by two observers (a radiologist with 10 years of expertise and another with 2 years of expertise in tomographic exams) trained in the assessment of tomographic scores related to encephalic ischemia alterations and blinded for the patients clinical and laboratorial data. The statistical analysis correlated the clinical findings, which included risk factors and predictors, as well as hemorrhagic transformation with the tomographic scores that evaluate cerebral ischemia. Results: groups with ASPECTS score ≤7 presented significantly higher use of antiarrhythmics, thrombolysis exclusion, higher NIHSS, higher 24 hours Rankin scale and more days of hospitalization when compared to ASPECTS >7. Patients with hemorrhagic transformation presented a significantly higher proportion of ASPECTS score ≤7. Conclusion: evaluated patients with cardioembolic ischemic CVA that had hemorrhagic transformation have worse tomographic ASPECTS score for ischemia, with higher NHISS and more hospitalization days. There was positive correlation between ASPECTS score and one third rule and BASIS tomographic scores.
22

Komplikace systémové trombolýzy u pacientů s CMP / Complications of systemic thrombolysis in patients with stroke

Drbohlavová, Šárka January 2018 (has links)
Strokes are one of the most serious diseases that often lead to permanent disability and in some cases even to death. Currently, widely available treatment by intravenous thrombolysis is recommended. The objectives of this diploma thesis are to analyse complications that may arise for patients with iCMP treated by intravenous system thrombolysis, to define the role of a nurse in ICU in terms of taking care of this group of patients, and to map all the factors influencing the result of the treatment. In order to obtain the data necessary, combined research method has been applied. The quantitative part was retrospectively evaluated based on SITS Registry data. The research part comprised of patients, to whom IVT was applied between January 2014 and December 2015. The subjects of the analysis were treatment complications, gender of patients treated by IVT, risk factors present, time data, and heaviness of the deficit before the treatment and after. Furthermore, we observed where is the patient released to after IVT and how many patients are able to stay in home environments three months after the treatment. Qualitative part of the investigation was evaluated based on half-structured interviews with the nurses working in ICUs for highly specialized care for patients with stroke. We observed their...
23

Perfil clínico-radiológico de um grupo de pacientes com AVC isquêmico cardioembólico atendidos em um centro de referência de emergências cerebrovasculares

Sousa, Fabrício Bergelt de January 2015 (has links)
Introdução:embora seja mundialmente conhecida a correlação entre os escores tomográficos de avaliação isquêmica cerebral com achados e desfechos clínicos em pacientes com acidente vascular cerebral (AVC) isquêmico, são limitadas as evidencias em pacientes do subtipo cardioembólico. Objetivo: avaliar e correlacionar o perfil e desfechos clínicos de pacientes com AVC isquêmico do subtipo cardioembólico com os achados tomográficos de isquemia, segundo escores tomográficos. Métodos:estudo retrospectivo de um grupo de pacientes com AVC do tipo cardioembólico segundo a classificação TOAST, selecionados através de uma amostra de conveniência dos pacientes que foram atendidos em um centro de referência de emergências cerebrovasculares (março de 2014 a março de 2015). Os exames tomográficos destes pacientes foram avaliados por dois observadores (um radiologista com 10 anos e outro com 2 anos de experiência em exames tomográficos) treinados na avaliação de escores tomográficos relacionados a alterações isquêmicas encefálicas e cegados para os dados clínicos e laboratoriais dos pacientes. A análise estatística correlacionou os achados clínicos que incuíram fatores e preditores de risco, bem como transformação hemorrágica com os escores tomográficos que avaliam a isquemia cerebral. Resultados:o grupo com escore ASPECTS ≤7 apresentou significativamente maior uso de antiarrítmico, exclusão de trombólise, maior NIHSS, escala Rankin em 24h mais elevada e mais dias de internação quando comparado ao ASPECTS >7. Os pacientes com transformação hemorrágica apresentaram proporção significativamente maior de escore ASPECTS ≤ 7, mais do que um terço de acometimento do território da artéria cerebral média e AVC maior considerado pelo escore BASIS. Conclusão:os pacientes avaliados com AVC isquêmico cardioembólico que apresentaram transformação hemorrágica têm valores piores nos escores tomográficos de isquemia, com NHISS mais elevado e maior número de dias de internação. Houve uma correlação positiva entre o escore ASPECTS e os escores tomográficos regra de um terço e BASIS. / Introduction: although known worldwide, the correlation between tomographic cerebral ischemia evaluation scores and clinical outcome in patients with ischemic cerebral vascular accident (CVA), the evidences on patients with cardioembolic subtype are limited. Objective: evaluate and correlate the profile and clinical outcomes of patients with embolic subtype ischemic CVA with ischemia tomographic findings, according to tomographic scores. Methods: retrospective study of a patients group with cardioembolic subtype CVA according to TOAST classification, selected through a convenience sample from the patients that were treated at the cerebral vascular disease reference center emergency, (March 2014 to March 2015). These patients tomographic exams were evaluated by two observers (a radiologist with 10 years of expertise and another with 2 years of expertise in tomographic exams) trained in the assessment of tomographic scores related to encephalic ischemia alterations and blinded for the patients clinical and laboratorial data. The statistical analysis correlated the clinical findings, which included risk factors and predictors, as well as hemorrhagic transformation with the tomographic scores that evaluate cerebral ischemia. Results: groups with ASPECTS score ≤7 presented significantly higher use of antiarrhythmics, thrombolysis exclusion, higher NIHSS, higher 24 hours Rankin scale and more days of hospitalization when compared to ASPECTS >7. Patients with hemorrhagic transformation presented a significantly higher proportion of ASPECTS score ≤7. Conclusion: evaluated patients with cardioembolic ischemic CVA that had hemorrhagic transformation have worse tomographic ASPECTS score for ischemia, with higher NHISS and more hospitalization days. There was positive correlation between ASPECTS score and one third rule and BASIS tomographic scores.
24

Influência de comorbidades clínicas na resposta ao tratamento trombolítico em pacientes com acidente vascular cerebral isquêmico / Clinical comorbidities are highly correlated with functional outcome in stroke thrombolysis

Martins, Rodrigo Targa January 2013 (has links)
Introdução: Diversas condições clínicas podem modificar a resposta ao tratamento trombolítico no acidente vascular isquêmico agudo. O grau de comorbidade dos pacientes medido pelo Índice de Charlson, um índice que mede o grau de comorbidades clínicas em AVC, tem valor prognóstico na incapacidade pós-AVC tanto em populações com acidente vascular do tipo hemorrágico como isquêmico. Objetivo: Avaliar o efeito do grau de comorbidade aferido pelo índice de Charlson na resposta ao tratamento trombolítico no acidente vascular isquêmico e a incapacidade na alta hospitalar. Métodos: Estudo de coorte prospectivo de 96 pacientes tratados com trombólise para o acidente vascular isquêmico, avaliando o impacto das comorbidades clínicas na resposta ao tratamento trombolítico no AVC isquêmico. Os pacientes foram divididos em dois grupos, aqueles com alto ou baixo grau de comorbidades clínicas, conforme o índice de Charlson. A evolução após o tratamento foi aferida pelo escore de gravidade dos sintomas de acordo com a escala do NIHSS medido antes da infusão, imediatamente após o tratamento, 24horas e 7 dias após a trombólise. A incapacidade na alta foi avaliada pela escala modificada de Rankin sendo, considerada boa resposta a pontuação 0-1 e sua frequência comparada entre os dois grupos de pacientes. Resultados: A comparação dos escores médios do NIHSS mostraram diferenças significativas nos diferentes momentos entre os grupos de alta e baixa comorbidade (Wilk's Lambda test F (1,92) = 24.293; p< 0.001). Pacientes com índice de comorbidade baixo apresentaram redução do escore do NIHSS de 10.13 para 2.9, enquanto que no grupo com alta comorbidade, o tratamento trombolítico demostrou pouco efeito. Uma boa evolução, definida como incapacidade 0 e 1 na escala modificada de Rankin, foi observada em (73%) dos pacientes com baixo índice de comorbidade, enquanto somente (15%) dos pacientes com alto índice de comorbidade apresentaram essa evolução favorável, uma diferença clinicamente muito significativa (RR 5.62; 95% CI = 2.97 a 10.65; p< 0.001). Conclusão: A presença de comorbidades clínicas medida peloíndice de Charlson foi associada a uma menor resposta neurológica no tratamento trombolítico do AVC isquêmico e a um maior grau de incapacidade funcional na alta. / Background and purpose: Clinical comorbidities modify prognosis in haemorrhagic and ischaemic stroke. Charlson Comorbidity index is a validated and useful tool for evaluating comorbidity in stroke. In this study we evaluated the effect of clinical comorbidities as measured by Charlson Comorbidity Index in the in ischaemic stroke thrombolysis. Methods: Prospective cohort study of 96 thrombolysis treated ischaemic stroke patients. The cohort population was divided in two groups according with severity of Charlson Comorbidity Index. During study, NIHSS score was evaluated four times (pre, post, 24 hours and 7 days after thrombolysis) and lower or higher comorbidities groups were compared using repeated measures ANOVA. Response to thrombolysis in both groups was also analysed with disability modified Rankin scale. Results: We observed differences in evolution of mean NIHSS scores between higher and lower clinical comorbidity groups. Patients with low clinical comorbidities experiencing a significant reduction of NIHSS score that ranged from 10.13 to 2.9 points, while patients in the HIC group had initial NIHSS score of 14.75 and final NIHSS score of 13.78 (Wilk's Lambda test F (1,92) = 24.293; p< 0.001). Lack of response to thrombolysis had direct relation with disability at hospital discharge. Better clinical outcome, as evaluated by modified Rankin scale of 0 and 1, was markedly different between groups, with 23 (73%) versus 9 (15%) in low and high clinical comorbidities patients respectively (RR=5.62; 95%CI=2.97 to 10.65; p< 0.001). Conclusion: High level of clinical comorbidities negatively influences response to thrombolysis, attenuating treatment related reduction of stroke symptoms severity and increasing the frequency of disabled patients at discharge.
25

Influência de comorbidades clínicas na resposta ao tratamento trombolítico em pacientes com acidente vascular cerebral isquêmico / Clinical comorbidities are highly correlated with functional outcome in stroke thrombolysis

Martins, Rodrigo Targa January 2013 (has links)
Introdução: Diversas condições clínicas podem modificar a resposta ao tratamento trombolítico no acidente vascular isquêmico agudo. O grau de comorbidade dos pacientes medido pelo Índice de Charlson, um índice que mede o grau de comorbidades clínicas em AVC, tem valor prognóstico na incapacidade pós-AVC tanto em populações com acidente vascular do tipo hemorrágico como isquêmico. Objetivo: Avaliar o efeito do grau de comorbidade aferido pelo índice de Charlson na resposta ao tratamento trombolítico no acidente vascular isquêmico e a incapacidade na alta hospitalar. Métodos: Estudo de coorte prospectivo de 96 pacientes tratados com trombólise para o acidente vascular isquêmico, avaliando o impacto das comorbidades clínicas na resposta ao tratamento trombolítico no AVC isquêmico. Os pacientes foram divididos em dois grupos, aqueles com alto ou baixo grau de comorbidades clínicas, conforme o índice de Charlson. A evolução após o tratamento foi aferida pelo escore de gravidade dos sintomas de acordo com a escala do NIHSS medido antes da infusão, imediatamente após o tratamento, 24horas e 7 dias após a trombólise. A incapacidade na alta foi avaliada pela escala modificada de Rankin sendo, considerada boa resposta a pontuação 0-1 e sua frequência comparada entre os dois grupos de pacientes. Resultados: A comparação dos escores médios do NIHSS mostraram diferenças significativas nos diferentes momentos entre os grupos de alta e baixa comorbidade (Wilk's Lambda test F (1,92) = 24.293; p< 0.001). Pacientes com índice de comorbidade baixo apresentaram redução do escore do NIHSS de 10.13 para 2.9, enquanto que no grupo com alta comorbidade, o tratamento trombolítico demostrou pouco efeito. Uma boa evolução, definida como incapacidade 0 e 1 na escala modificada de Rankin, foi observada em (73%) dos pacientes com baixo índice de comorbidade, enquanto somente (15%) dos pacientes com alto índice de comorbidade apresentaram essa evolução favorável, uma diferença clinicamente muito significativa (RR 5.62; 95% CI = 2.97 a 10.65; p< 0.001). Conclusão: A presença de comorbidades clínicas medida peloíndice de Charlson foi associada a uma menor resposta neurológica no tratamento trombolítico do AVC isquêmico e a um maior grau de incapacidade funcional na alta. / Background and purpose: Clinical comorbidities modify prognosis in haemorrhagic and ischaemic stroke. Charlson Comorbidity index is a validated and useful tool for evaluating comorbidity in stroke. In this study we evaluated the effect of clinical comorbidities as measured by Charlson Comorbidity Index in the in ischaemic stroke thrombolysis. Methods: Prospective cohort study of 96 thrombolysis treated ischaemic stroke patients. The cohort population was divided in two groups according with severity of Charlson Comorbidity Index. During study, NIHSS score was evaluated four times (pre, post, 24 hours and 7 days after thrombolysis) and lower or higher comorbidities groups were compared using repeated measures ANOVA. Response to thrombolysis in both groups was also analysed with disability modified Rankin scale. Results: We observed differences in evolution of mean NIHSS scores between higher and lower clinical comorbidity groups. Patients with low clinical comorbidities experiencing a significant reduction of NIHSS score that ranged from 10.13 to 2.9 points, while patients in the HIC group had initial NIHSS score of 14.75 and final NIHSS score of 13.78 (Wilk's Lambda test F (1,92) = 24.293; p< 0.001). Lack of response to thrombolysis had direct relation with disability at hospital discharge. Better clinical outcome, as evaluated by modified Rankin scale of 0 and 1, was markedly different between groups, with 23 (73%) versus 9 (15%) in low and high clinical comorbidities patients respectively (RR=5.62; 95%CI=2.97 to 10.65; p< 0.001). Conclusion: High level of clinical comorbidities negatively influences response to thrombolysis, attenuating treatment related reduction of stroke symptoms severity and increasing the frequency of disabled patients at discharge.
26

New Therapeutic Approaches in Pulmonary Embolism

Schellong, Sebastian M., Schmidt, Benjamin A. January 2003 (has links)
Pulmonary embolism as a part of venous thromboembolic disease has a broad spectrum of clinical presentations from minimal disease to life-threatening right heart failure. Therapy has to be guided by the risk associated with the individual clinical state of the patient. As long as hemodynamics are entirely stable, anticoagulation is given in order to prevent early or late recurrence, thereby allowing for endogeneous thrombolysis and recovery. In hemodynamically instable patients, i.e. patients under cardiopulmonary resuscitation or in shock, there is the need for a rapid reduction of thrombus mass in order to restore right ventricular function. Systemic thrombolysis is the most feasible modality to reduce the thrombus burden of the pulmonary circulation in the short term. For hemodynamically stable patients with right ventricular dysfunction as assessed by echocardiography, there is still some controversy as to whether thrombolysis improves the long-term outcome. At the least, thrombolysis may positively modify the short-term course of acute disease in patients with an extremely low risk of bleeding. When the acute phase has been overcome, secondary prophylaxis with vitamin K antagonists has to be given. The duration of secondary prophylaxis requires an individual assessment of both the risk of recurrence and the risk of bleeding. In the near future, new anticoagulant drugs such as direct thrombin and factor Xa inhibitors will offer new treatment modalities for the acute phase as well as for secondary prophylaxis. / Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
27

Evolution of obstructive sleep apnea after ischemic stroke

Huhtakangas, J. (Jaana) 03 December 2019 (has links)
Abstract In Finland, the costs of stroke are approximately 1.1 billion euros annually due to long disability and hospitalization episodes. Sleep apnea is a risk factor for stroke. The prevalence of sleep apnea among stroke patients is unknown because sleep recording is not usually performed on stroke patients. There are no previous studies investigating the association of thrombolysis on the prognosis of sleep apnea. The relation between sleep apnea and cardiovascular events is still unclear. In this prospective, observational study, I recruited voluntary, consecutive ischemic stroke patients over the age of 18 years who were or were not eligible for thrombolysis treatment. The investigators did not affect the treatment and patients were not randomized to thrombolysis. The final analysis included 204 patients; of these, 110 underwent thrombolysis therapy and 94 were treated without thrombolysis. Cardiorespiratory polygraphy was carried out with a portable three-channel device (ApneaLinkPlus™, Resmed, Sydney, Australia) at the ward within 48 hours after the onset of stroke symptoms. The cardiorespiratory polygraphy was repeated at home after a six-month follow-up. Both automatic scoring and manual scoring pointed out excellent agreement in arterial oxyhemoglobin decrease of &#62; 4% (ODI4), lowest arterial oxyhemoglobin saturation (SaO2) or percentage of time spent below 90 percent saturation. The automated scoring underestimated the severity of sleep apnea, recognized poorly the type of event, and missed 18.6% of sleep apnea diagnoses. The total prevalence of sleep apnea in this study was 91.2% on admission to hospital. The stroke patients treated with thrombolysis had more, and more severe sleep apnea in the first sleep recording compared to those without thrombolysis therapy. After follow-up, the prevalence of sleep apnea still remained high, and sleep apnea was aggravated in two thirds of the stroke patients. The study patients without thrombolysis treatment had six-fold higher risk for incident sleep apnea after the follow-up. The stroke patients with thrombolysis therapy and visible stroke on CT had more nocturnal hypoxemia and higher obstructive apnea index than the patients without stroke lesion on follow-up CT 24 hours after thrombolysis treatment. The larger the ischemic stroke volume, the greater the time spent with saturation below 90%. / Tiivistelmä Aivoinfarkti on yleinen ja kansanterveydellisesti sekä taloudellisesti merkittävä sairaus, jonka aiheuttamat kustannukset Suomessa ovat noin 1.1 miljardia euroa pitkistä työkyvyttömyys- ja sairaalajaksoista johtuen. Uniapnea on aivoinfarktille altistava tekijä. Uniapnean esiintyvyys suomalaisilla aivoinfarktipotilailla ei ole arvioitavissa, koska aivoinfarktin sairastaneille ei yleensä tehdä unirekisteröintiä. Kannettavat yöpolygrafialaitteet saattaisivat olla vaihtoehto aivoinfarktipotilaiden uniapnean diagnosoinnille. Tutkittua tietoa liuotushoidon yhteydestä uniapnean ennusteeseen ei ole. Uniapnean sekä sydän- ja verisuonitapahtumien syy-yhteys on edelleen epäselvä. Rekrytoin prospektiiviseen tutkimukseeni vapaaehtoisia, peräkkäisiä yli 18-vuotiaita iskeemiseen aivoinfarktiin sairastuneita liuotushoidettuja ja liuotushoitoon soveltumattomia potilaita. Tutkimuksen lopullinen potilasmäärä oli 204, joista 110 sai liuotushoidon ja 94 hoidettiin ilman liuotusta. Kaikille potilaille tehtiin yöpolygrafia kannettavalla, kolmikanavaisella yöpolygrafialaitteella (Apnealink Plus, Resmed, Sydney, Australia) osastolla 48 tunnin kuluessa sairastumisesta. Yöpolygrafia toistettiin potilaan kotona kuuden kuukauden kuluttua. Sekä automaattitulos että manuaalisesti arvioitu unirekisteröintitulos olivat erittäin yhteneväisiä, kun arvion kohteena olivat happikyllästeisyyden neljän prosenttiyksikön suuruiset pudotukset tuntia kohti, matalin veren happikyllästeisyys tai alle 90 % happikyllästeisyyden osuus yöstä. Automaattianalyysi aliarvioi uniapnean vaikeuden, havaitsi huonosti hengityskatkosten tyypin eikä löytänyt 18,6 prosenttia uniapneadiagnooseista. Uniapnean esiintyvyys koko aineistossa oli sairaalaan tullessa 91,2 %. Liuotushoidetuilla potilailla todettiin ensimmäisessä rekisteröinnissä enemmän uniapneaa ja se oli vaikeampaa kuin ei-liuotushoidetuilla. Seurannassa uniapnean määrä pysyi edelleen korkeana ja uniapnea vaikeutui kahdella potilaalla kolmesta. Liuotushoitoon soveltumattomilla aivoinfarktipotilailla todettiin liuotushoidon saaneisiin verrattuna kuusinkertainen riski sairastua uniapneaan puolen vuoden aikana. Liuotushoidetuilla aivoinfarktipotilailla, joilla oli infarktimuutos kuvantamistutkimuksessa, oli yöllistä valtimoveren happikyllästeisyyden huononemista ja ylähengitysteiden ahtautumisesta johtuvia hengityskatkoksia enemmän kuin niillä potilailla, joilla ei todettu iskeemisiä muutoksia aivokuvantamisessa 24 tuntia liuotushoidon jälkeen. Mitä suurempi aivoinfarktin tilavuus, sitä suuremman osuuden yöstä veren happikyllästeisyys oli alle 90 %.
28

Ultrasound-enhanced drug delivery in a perfused ex vivo artery model

Hitchcock, Kathryn E. 03 August 2010 (has links)
No description available.
29

Stroke Study: Novel Animal Models and Innovative Treatment Strategy

Yu, Xinge 04 August 2016 (has links)
No description available.
30

Generation of Drug-loaded Echogenic Liposomes using Microfluidic Hydrodynamic Flow Focusing

Mukherjee, Prithiviraj 28 June 2016 (has links)
No description available.

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