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Ensaio clínico randomizado do uso do curativo gel de clorexidina para a prevenção da colonização do cateter venoso central em pacientes adultos críticos / Randomized clinical trial of the use of chlorhexidine gel dressing for the prevention of colonization of the central venous catheter in critical adult patientsMargatho, Amanda Salles 16 February 2016 (has links)
Os acessos venosos são indispensáveis para assistência do paciente em situação crítica. O cateter venoso central (CVC) é um acesso que viabiliza a terapêutica dessa clientela, mas o seu uso pode levar à infecções. Estas infecções ocasionam maior permanência hospitalar, elevam os custos totais das instituições e aumentam a morbidade e a mortalidade do paciente. O uso de curativos como cobertura do sítio de saída do CVC é eficaz na prevenção das infecções relacionadas a estes cateteres, em particular, o uso de curativos impregnados com antissépticos como o curativo gel de clorexidina. Este estudo teve como objetivo comparar a efetividade do curativo gel de clorexidina com a do filme transparente de poliuretano na prevenção da colonização do cateter venoso central em pacientes adultos críticos. Trata-se de estudo experimental, do tipo ensaio clínico randomizado, com tratamentos em paralelo, prospectivo e monocêntrico, realizado de acordo com as recomendações do Consolidated Standards of Reporting Trials (CONSORT). O estudo foi realizado na Unidade de Terapia Intensiva e na Unidade Coronariana de um hospital de ensino do interior do Estado de São Paulo. Participaram do estudo 102 indivíduos hospitalizados nestes locais, divididos aleatoriamente em dois grupos: grupo intervenção, no qual o tipo de cobertura utilizada foi o curativo de gel de clorexidina e grupo controle, que utilizou como cobertura o filme transparente de poliuretano. O desfecho primário mensurado foi a colonização do cateter e os desfechos secundários foram a infecção clínica do sítio de saída, a infecção microbiológica do sítio de saída e a infecção da corrente sanguínea relacionada ao cateter. Para a coleta de dados foi elaborado um instrumento, e este validado quanto ao seu conteúdo e forma por 13 enfermeiros pertencentes aos locais do estudo. Estes profissionais foram treinados para a realização dos curativos e coleta das pontas dos cateteres centrais, swabs dos sítios de saída e hemoculturas. Análises descritivas foram usadas para todas as variáveis do estudo. O teste Exato de Fisher foi utilizado para comparar as proporções de cada desfecho nos grupos de intervenção e controle, e a regressão logística para explorar se a colonização no CVC poderia ser associada com o tempo de uso do cateter e com o Acute Physiology and Chronic Health Evaluation II (APACHE II) dos pacientes do estudo. De acordo com os resultados não houve diferença estatisticamente significante entre a colonização nos dois grupos (p valor = 1.00), para a infecção microbiológica do sítio de saída (p valor = 0.08), para a infecção clínica do sítio de saída (p valor = 0.77) e para as infecções da corrente sanguínea relacionadas ao cateter (p valor = 1,00). Conclui-se que o presente estudo pode contribuir para que as unidades de saúde tenham subsídios para realizar a escolha do tipo de curativo baseado em suas necessidades institucionais e no desenvolvimento de protocolos relacionados à medidas de inserção e manutenção do cateter, bem como medidas educativas permanentes / The venous access is essential to patient care in critical condition. The central venous catheter (CVC) is an access point that allows the treatment of patients, but its use can lead to infections. These infections increase the period of hospital permanence, the total costs of institutions and the patients\' morbidity and mortality. The use of dressings for coverage of the CVC exit-site is effective in preventing infections related to these catheters, in particular, the use of dressings impregnated with antiseptics such as chlorhexidine gel. This study aimed to compare the effectiveness of chlorhexidine gel dressing with the transparent polyurethane film in preventing colonization of central venous catheter in critical adult patients. This randomized experimental study with parallel treatment, prospective and monocentric, which is conducted according to the Consolidated Standards of Reporting Trials (CONSORT) guidelines. The research was performed in an Intensive Care Unit and in a Coronary Care of a teaching hospital in the interior of the State of São Paulo. The study included 102 patients hospitalized in these units, randomly divided into two groups: the intervention group, which used chlorhexidine gel dressing and the control group, which used the transparent polyurethane film dressing. The primary outcome measured was the colonization of the catheter and the secondary outcomes were the clinical infection and microbial infection of the exit-site and the catheter-related bloodstream infection. Data were collected through an instrument developed and validated in terms of content and form by 13 nurses of the Units where the study was performed. These professionals were trained to use the dressings and to collect the tips of central catheters, swabs of the exit-site and blood cultures. Descriptive statistics were used for all study variables. The Fisher\'s exact test was used to compare the proportions of each outcome in the groups of intervention and control. The logistic regression analysis was used to explore if the colonization of the CVC could be associated with the catheter usage time and the Acute Physiology and Chronic Health Evaluation II (APACHE II) of the research\'s participants. According to the results there was no statistically significant difference between colonization in both groups (p value=1:00), for exit-site microbial infection (p value=0:08), for exit- site clinical infection (p value = 0.77) and for catheter-related bloodstream infection (p-value=1.00). The results of this study may contribute in providing subsidies to health units to make the choice in the use of the type of dressing based on their institutional needs and in the development of protocols related to integration measures and maintenance of the catheter, as well as permanent educational measures
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Ensaio clínico randomizado do uso do curativo gel de clorexidina para a prevenção da colonização do cateter venoso central em pacientes adultos críticos / Randomized clinical trial of the use of chlorhexidine gel dressing for the prevention of colonization of the central venous catheter in critical adult patientsAmanda Salles Margatho 16 February 2016 (has links)
Os acessos venosos são indispensáveis para assistência do paciente em situação crítica. O cateter venoso central (CVC) é um acesso que viabiliza a terapêutica dessa clientela, mas o seu uso pode levar à infecções. Estas infecções ocasionam maior permanência hospitalar, elevam os custos totais das instituições e aumentam a morbidade e a mortalidade do paciente. O uso de curativos como cobertura do sítio de saída do CVC é eficaz na prevenção das infecções relacionadas a estes cateteres, em particular, o uso de curativos impregnados com antissépticos como o curativo gel de clorexidina. Este estudo teve como objetivo comparar a efetividade do curativo gel de clorexidina com a do filme transparente de poliuretano na prevenção da colonização do cateter venoso central em pacientes adultos críticos. Trata-se de estudo experimental, do tipo ensaio clínico randomizado, com tratamentos em paralelo, prospectivo e monocêntrico, realizado de acordo com as recomendações do Consolidated Standards of Reporting Trials (CONSORT). O estudo foi realizado na Unidade de Terapia Intensiva e na Unidade Coronariana de um hospital de ensino do interior do Estado de São Paulo. Participaram do estudo 102 indivíduos hospitalizados nestes locais, divididos aleatoriamente em dois grupos: grupo intervenção, no qual o tipo de cobertura utilizada foi o curativo de gel de clorexidina e grupo controle, que utilizou como cobertura o filme transparente de poliuretano. O desfecho primário mensurado foi a colonização do cateter e os desfechos secundários foram a infecção clínica do sítio de saída, a infecção microbiológica do sítio de saída e a infecção da corrente sanguínea relacionada ao cateter. Para a coleta de dados foi elaborado um instrumento, e este validado quanto ao seu conteúdo e forma por 13 enfermeiros pertencentes aos locais do estudo. Estes profissionais foram treinados para a realização dos curativos e coleta das pontas dos cateteres centrais, swabs dos sítios de saída e hemoculturas. Análises descritivas foram usadas para todas as variáveis do estudo. O teste Exato de Fisher foi utilizado para comparar as proporções de cada desfecho nos grupos de intervenção e controle, e a regressão logística para explorar se a colonização no CVC poderia ser associada com o tempo de uso do cateter e com o Acute Physiology and Chronic Health Evaluation II (APACHE II) dos pacientes do estudo. De acordo com os resultados não houve diferença estatisticamente significante entre a colonização nos dois grupos (p valor = 1.00), para a infecção microbiológica do sítio de saída (p valor = 0.08), para a infecção clínica do sítio de saída (p valor = 0.77) e para as infecções da corrente sanguínea relacionadas ao cateter (p valor = 1,00). Conclui-se que o presente estudo pode contribuir para que as unidades de saúde tenham subsídios para realizar a escolha do tipo de curativo baseado em suas necessidades institucionais e no desenvolvimento de protocolos relacionados à medidas de inserção e manutenção do cateter, bem como medidas educativas permanentes / The venous access is essential to patient care in critical condition. The central venous catheter (CVC) is an access point that allows the treatment of patients, but its use can lead to infections. These infections increase the period of hospital permanence, the total costs of institutions and the patients\' morbidity and mortality. The use of dressings for coverage of the CVC exit-site is effective in preventing infections related to these catheters, in particular, the use of dressings impregnated with antiseptics such as chlorhexidine gel. This study aimed to compare the effectiveness of chlorhexidine gel dressing with the transparent polyurethane film in preventing colonization of central venous catheter in critical adult patients. This randomized experimental study with parallel treatment, prospective and monocentric, which is conducted according to the Consolidated Standards of Reporting Trials (CONSORT) guidelines. The research was performed in an Intensive Care Unit and in a Coronary Care of a teaching hospital in the interior of the State of São Paulo. The study included 102 patients hospitalized in these units, randomly divided into two groups: the intervention group, which used chlorhexidine gel dressing and the control group, which used the transparent polyurethane film dressing. The primary outcome measured was the colonization of the catheter and the secondary outcomes were the clinical infection and microbial infection of the exit-site and the catheter-related bloodstream infection. Data were collected through an instrument developed and validated in terms of content and form by 13 nurses of the Units where the study was performed. These professionals were trained to use the dressings and to collect the tips of central catheters, swabs of the exit-site and blood cultures. Descriptive statistics were used for all study variables. The Fisher\'s exact test was used to compare the proportions of each outcome in the groups of intervention and control. The logistic regression analysis was used to explore if the colonization of the CVC could be associated with the catheter usage time and the Acute Physiology and Chronic Health Evaluation II (APACHE II) of the research\'s participants. According to the results there was no statistically significant difference between colonization in both groups (p value=1:00), for exit-site microbial infection (p value=0:08), for exit- site clinical infection (p value = 0.77) and for catheter-related bloodstream infection (p-value=1.00). The results of this study may contribute in providing subsidies to health units to make the choice in the use of the type of dressing based on their institutional needs and in the development of protocols related to integration measures and maintenance of the catheter, as well as permanent educational measures
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Thromboprophylaxis in Pediatric Patients with a Central Venous CatheterSkrocki, Emily Therese, Skrocki, Emily Therese January 2017 (has links)
Objective
Formulation of a clinical practice guideline (CPG) for the use of thromboprophylaxis (TP) in pediatric patients with a central venous catheter (CVC).
Participants
The development team consisted of five experts and a doctoral candidate acting as the primary author.
Evidence
The guideline was developed utilizing the Appraisal of Guidelines for Research and Evaluation (AGREE) II framework. A systematic review of the evidence was performed and evidence was graded using the American Academy of Pediatrics (2004) evidence classifications for CPG recommendations. An appraisal team evaluated the guideline quality utilizing the AGREE Plus platform rating the guideline as “highest quality.”
Consensus
Employing a modified Delphi methodology, members of the development team reviewed available evidence and voted on proposed Key Action Statements (KAS). Consensus is defined as 80% rating the KAS “usually appropriate.”
Conclusion
Five KAS are included in the final CPG. Each KAS indicates level of evidence, benefit-harm relationship, and level of recommendation.
KAS 1. Providers of hospitalized children (0-18 years of age) may assess for VTE risk factors using the Skrocki VTE risk stratification tool if the patient has a CVC. (Evidence Quality:C, Rec. Strength: Option).
KAS 2. Providers of hospitalized children should initiate targeted pharmacologic thromboprophylaxis (tpTP) at the time of CVC insertion or hospital admission (if CVC present on admission). (Evidence Quality: B, Rec. Strength: Strong Recommendation)
KAS 3. Providers of hospitalized children with a CVC should implement mechanical thromboprophylaxis (mTP) if the child is immobile (Braden Q score <2) or moderate/ high risk for VTE using the Skrocki VTE risk stratification tool and have no contraindications to mTP. (Evidence Quality: B, Rec. Strength: Recommendation).
KAS 4. Providers of hospitalized children with a CVC may prescribe systemic pharmacologic thromboprophylaxis (spTP) if the patient is found to be at high risk for VTE using Skrocki VTE risk stratification tool and the patient has no contraindications to spTP. (Evidence Quality: C, Rec. Strength: Option).
KAS 5. Providers of hospitalized children should avoid femoral CVCs, multilumen CVCs and/or percutaneous insertion technique if their benefit does not clearly outweigh their risks. (Evidence Quality: B, Rec. Strength: Recommendation).
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Problematika ošetřování centrálních žilních katétrů v intenzivní a metabolické péči / The issue of central venous catheter treatment in intensive and metabolic careZatočilová, Jana January 2013 (has links)
The present thesis deals with the issue of central venous catheter treatment in intensive and metabolic care, as well as the complications, which can accompany central venous cannulation and thus affect the possible period of using central venous catheter. The theoretical part tries to summarize the information concerning the issues of central venous catheters and their treatment. It also contains essential physiological and anatomical notes concerning central venous cannulation and a historical summary with regard to the present knowledge. The first part of the empirical section of the research follows the medical approach in various departments of the 4th Department of Internal Medicine of the General Teaching Hospital in Prague, as well as their influence on prevention and the rise of complications. The goal of the second part of the research is to make suggestions for treatment of central venous catheters, which could help to improve nursing care and the using period of catheter. The conclusion evaluates, whether the recommendations have at least partially become a part of the nursing care and if they have helped to resolve the areas of concern or not. Key words Central venous catheter, nursing care, complications of central venous catheter, central venous access.
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Adhesive Transparent Chlorohexidine Gluconate Tegaderm™ Gel Dressing for Central Venous CatheterMwangi, Peter Kimiti 01 January 2019 (has links)
Central-line-associated bloodstream infections (CLABSIs) occur during the insertion or change of the dressing of the central venous catheter (CVC) and are reportable healthcare-associated infections at the state and the national level. The purpose of this systematic review of the literature was to evaluate and synthesize available evidence to establish the effectiveness of using an adhesive transparent chlorohexidine gluconate (CHG) Tegaderm™ gel dressing for CVC in the prevention of CLABSIs. The logic model was used as a framework to guide the review of the literature to establish how an intervention that is not currently practiced can contribute to CVC prevention of infection. The practice question focused on gathering evidence to support the effects of CHG Tegaderm™ gel central-line dressing compared with the Biopatch® dressing. A total of 373 articles were retrieved and 16 met the inclusion for review and were graded according to the Melnyk and Fineout-Overholt hierarchy level of evidence and evidence synthesis broken down into the reduction of CLABSI, the cost-effectiveness and ease of use of the CHG Tegaderm™ gel. Findings from the systematic review supported the use of CHG gel dressing as a CLABSI preventative measure. The findings from the project support positive social change by reducing CLABSI and associated illnesses and saving the increased cost, mortality, and morbidity associated with CLABSIs.
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The Relationship Between Central Venous Catheter and Post-Operative Complications in Patients Undergoing Hepatic ResectionO'Connor, David C 01 January 2018 (has links)
The Relationship Between Central Venous Catheter and Post-operative Complications in Patients Undergoing Hepatic Resection
David C. O’Connor, Ph.D., DNAP, CRNA
A dissertation submitted in partial fulfillment of the requirements for the degree of
Doctor of Philosophy at Virginia Commonwealth University
Virginia Commonwealth University, 2018
Dissertation Chair: Clarence J. Biddle, Ph.D., CRNA
Hepatic resection is indicated for primary and secondary malignancies. Use of a low central venous pressure technique is associated with decreased blood loss in these cases. This technique has evolved; central venous catheters and high dose morphine are no longer used, and patients are extubated earlier. The purpose of this study is to assess a relationship between these changes and outcomes.
Central venous pressure has fallen out of favor as an accurate fluid measurement. Central venous catheters are associated with many complications. Outcomes in patients undergoing hepatic resection have improved over 20 years at one high volume institution.
Guided by Donabedian’s theory of measuring outcomes, a non-randomized, non-experimental, retrospective, cohort design was conducted.
The independent variables were intraoperative insertion of a central venous catheter, use of morphine, and time of extubation. The dependent variables were superficial and deep wound infections, number and severity of complications. The population sample is patients who submitted to partial hepatectomy at Memorial Sloan Kettering Cancer Center from 2007-2016.
Data was obtained from hepatobiliary and anesthesia databases at Memorial Sloan Kettering Cancer Center.
Data of 2518 from a possible 3903 patients were analyzed with chi square, univariate, Poisson and multivariate regressions. Univariate analysis for presence of CVC was significant for 90-day mortality (p 0.013). Use of morphine was significant for superficial wound infection (p 0.035), and a decrease in complications (p <.001). Amount of morphine was associated with fewer severe complications (p <.001). Incidental findings included a relationship between gender, total amount of fluids and number of segments resected.
The significance of CVC with 90-day mortality was eliminated with stepwise multivariate regression. The findings support the change in anesthetic practice with clinical significance. Incidental findings regarding fluids and segments are supported in the literature. Future research should include goal directed fluid therapy and investigation of the relationship between gender and outcomes.
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Identifying Risk Factors for High Incidence of Peripheral Intravenous Catheters Complications: Reducing Infiltration Rate within the HospitalBanks, Janise Marrisette 01 January 2015 (has links)
This study addressed an increasing number of peripheral intravenous catheter infiltrations within hospitals, leading to problems such as phlebitis and cellulitis, which may result in a longer length of hospital stay. The purpose of this project was to determine how to reduce infiltrations in order to increase the longevity of the catheter. A quantitative, description design was used, guided by Abdellah's classification framework for identifying nursing problems. The target population was 50 patients experiencing incidents of peripheral intravenous catheter infiltration, identified in a patient safety event log used across a 252-bed hospital. Each incident was assessed for several risk factors, such as age, diagnosis, length of time of catheter use, co-morbidities, size of catheter used for insertion, and how many medications were being administrated intravenously. Using descriptive statistics, the combination of patient co-morbidities had a direct correlation with increased probability of infiltration before 96 hours. Among 82% of patients, co-morbidities included hypertension in 56% of subjects, advancing age, and placement of the catheter in the upper arm. Data play a significant role in decisions to change clinical practice and protocols. Findings from this study related to peripheral intravenous catheter insertions, and their maintenance can drive changes across a healthcare organization.
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Komplikationer hos patienter med PICCKarevaara, Anette January 2013 (has links)
SAMMANFATTNING Bakgrund: PICC är en central infart som används inom vården för att kunna ge kärlretande läkemedel. Komplikationer vid användning av PICC kan vara infektion, trombos, tromboflebit eller stopp i katetern. Syfte: Syftet med studien är att undersöka förekomsten av komplikationer av PICC hos onkologiska patienter samt för att se om det finns några skillnader mellan olika diagnosgrupper och behandlingar med avseende på förekomsten av djupa ventromboser (DVT) och infektioner. Syftet är också att ta reda på hur länge en PICC sitter och hur vanligt det är att en PICC felplaceras. Metod: Metoden som används är en retrospektiv, deskriptiv, kvantitativ undersökning. I studien ingår alla onkologpatienter som fått en PICC år 2009-2011 (n=677). Data samlades in med hjälp av journalgranskning. Resultat: Förekomsten av DVT var 5,6 %. Patienter som fick behandling med Capecitabin hade statistiskt signifikant mer DVT jämfört med andra behandlingar. Patienter som fick behandling med R-CHOP hade statistiskt signifikant mindre DVT jämfört med andra behandlingar. Antalet infektioner var 3 %. Stopp i katetern drabbade 1,8 % av patienterna, 17 % hade besvär med rodnad under förbandet, 12 % av alla katetrar åkte ut 4 cm eller mer och 2,5 % av katetrarna felplacerades vid inläggningen. En PICC var insatt i medelvärde 92 dagar, median 105 dagar. Slutsats: Förekomsten av komplikationer av PICC var låg hos onkologiska patienter med undantag för hudbesvär som förekom hos var sjätte patient. Behandlingar innehållande Capecitabin förefaller öka risken för DVT men fler studier behövs för att öka kunskaperna om detta. PICC är en säker venös infart vid behandling med cytostatika. / ABSTRACT Background: PICC (peripherally inserted central catheter) is a central line used in healthcare to provide vascular irritant drugs. Complications with PICC can be infection, thrombosis, thrombophlebitis or occlusion of the catheter. Aim: The aim of the study is to examine the incidence of complications of PICC in oncology patients and to see if there are any differences between diagnostic groups and treatments for the presence of deep venous thrombosis (DVT) and infection. The aim is also to find out for how long time a PICC is inserted and how common it is for a PICC misplaced. Method: The method used is a retrospective, descriptive, quantitative survey. The study includes all oncology patients who received a PICC years 2009-2011 (n=677). Data were collected through medical record review. Results: The incidence of DVT was 5,6 %. Patients treated with Capecitabin had statistically significantly more DVT compared with other treatments. Patients treated with R-CHOP had statistically significantly less DVT compared with other treatments. The incidence of infections was 3 %. Occlusion of the catheter affected 1,8 % of patients, 17 % had problems with redness under the dressing, 12 % of all catheters went out four cm or more and 2,5 % of the catheters were misplaced at insertion. A PICC was inserted in mean 92 days, median 105 days. Conclusion: The complication rate of PICC was low in oncology patients with the exception of skin problems that occurred in every sixth patient. Treatments containing Capecitabin appears to increase the risk of DVT but more studies are needed to raise awareness of this. PICC is a safe venous access for chemotherapy.
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Prevence nozokomiálních infekcí u centrálních venózních katétrů na standardních a intenzivních odděleních / The prevention of nosocomial infections at central venous catheters in standard inpatient departments and intensive care units.PAŽOUTOVÁ, Petra January 2014 (has links)
Nosocomial infections are one of serious problems of modern medicine and nursing also nosocomial infections mean real serious problems for future. Prevention of nosocomial infections, applied together with pointed and meaningful antimicrobial therapy is the only causal solution now. This work was aimed primarily at a comparison of knowledge of common nurses working in intensive care wards and common nurses in standard wards. In general, it could be said that the aim of this work was to map the scope of knowledge of common nurses as for nosocomial infections as well as aseptic care for central venous catheters including catheter sepses. The found deficit in knowledge of common nurses pointed out the occurrence of mistakes in nursing practices. Quality of nursing is connected closely with standardisation of nursing procedures. Quantitative research inquiry was realised in 4 medical facilities: Regional hospital Liberec, a.s., Masaryk city hospital in Jilemnice, Hospital České Budějovice, a.s. and Hospital with polyclinic in Semily. As the research method there was chosen a non-standardised questionnaire. The sample of respondents was chosen as an intentional selectionand and in to statistic processing included 290 relevantly filled out forms. The research investigation also included a comparison and quantification of nursing standards. In view of the performed comparison of standards in nursing we concluded that creation of incomplete or even inconsistent standards occurs here. We have prepared a "Proposal on a standard of nursing care for inserted venous catheter", of which form could enable to implement it in medical care facilities within the Czech Republic and define clearly basic nursing procedures within the scope of these problems.
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Colonização de cateteres venosos centrais por biofilme microbiano /Storti, Anisio. January 2006 (has links)
Resumo: Os cateteres venosos centrais são muito usados nas Unidades de Terapia Intensiva (UTIs). O seu uso está freqüentemente associado a complicações incluindo infecções fatais. Durante o período de janeiro de 2004 a janeiro de 2005, foram analisadas 118 pontas de cateteres e 42 amostras de sangue provenientes de 100 pacientes hospitalizados em Unidade de Terapia Intensiva de um hospital da região Noroeste do estado de São Paulo. O objetivo deste estudo foi analisar, por meio de cultura e microscopia eletrônica de varredura, a colonização do cateter intravenoso central de vialon Intracath de lúmem único. Para detectar a produção de slime dos microrganismos isolados foi usado o método de Christensen et al., (1985) e o perfil de sensibilidade aos antimicrobianos de acordo com o (NCCLS-M2-A7-2000). Das 118 pontas de cateteres estudadas pelo método semi-quantitativo, 34 (28,8%) estavam colonizadas (d15 UFC/placa) em que foram isolados 55 microrganismos. Desses, 32 (58,2%) foram classificados como Gram-positivos com freqüência maior para 15 (27,3%) Staphylococcus aureus, seis (10,9%) Staphylococcus epidermidis; 19 (34,5%) classificados como Gram-negativos com freqüência maior para seis (10,9%) Acinetobacter baumannii, três (5,4%) Pseudomonas aeruginosa, Enterobacter aerogenes respectivamente e ainda quatro (7,3%) classificadas como leveduras sendo duas (3,6%) Candida albicans e duas (3,6%) Candida parapsilosis...(Resumo completo, clicar acesso eletrônico abaixo). / Abstract: The aim of the present study was to evaluate the hepatotoxicity, pharmacokinetic parameters and biotransformation of isoniazid when rats were treated with isoniazid (INH); rifampicin (RMP); and INH + RMP. Daily doses of the tuberculostatic drugs were administrated intragastrically to the animals (Wistar rats) for one period of 21 days as follow: sterile water (group I, control); INH (100mg/Kg) (group II), RMP (100mg/Kg) (group III); INH (100mg/Kg) + RMP (100mg/Kg) (group IV). The serum levels of the biomarkers aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were determined before the administration of the drugs (basal) and after the 21 days treatments. On day 21, blood samples were obtained before and 15þ; 30þ; 45þ; 60þ; 1,5; 3h; 6h; 12h and 24 hours after the dose. (five animals for each point). The blood samples were deproteinized with 10% trichloroacetic acid, derivatized by 1% cinnamaldehyde and analyzed by liquid chromatograph. For the determination of the acetylated metabolites acetylisoniazid (AcINH) and acetylhydrazine (AcHz) a previous hydrolysis with 6 M hydrochloride acid was performed. The results are presented as mean and SEM. ...(Complete abstract, click electronic address below). / Orientador: Elisabeth Loshchagin Pizzolitto / Coorientador: Antonio Carlos Pizzolitto / Banca: Taís Maria Bauab / Banca: Sérgio Aparecido Torres / Banca: Sergio Eduardo Longo Fracalanza / Banca: Beatriz Ernestina Cabilio Guth / Doutor
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