Thesis (M.S.)--University of Michigan, 1989.

Thesis (M.S.)--University of Michigan, 1988.

The diploma thesis if focused on the study of bioactive hydrogél and nanofiber wound dressings composed of natural biopolymers, which were functionalized by active compounds in the form of analgesic, antibiotics and enzymes. Hydrogél wound dressings were constituted from alginate and chitosan and nanofibers were created from polyhydroxybutyrate. The following 7 active compounds were selected to be added to the wound dressings: ampicillin, streptomycin, ibuprofen, papain, bromelain, collagenase and trypsin. In the theoretical part the structure of the skin and types of wound injuries were described. This part also talks about types of wound dressing and their applications, as well as treatment of skin wounds using enzymes and compounds with analgesic and antimicrobial properties. In addition, this section describes safety assays, in particular cytotoxicity assays on human cells. At the beginning of the experimental part, the process of preparation of hydrogél wound dressing was optimised. Subsequently, the dressings were enriched with active compounds and the rate of gradual releasing of the substances into model environment was monitored. In the case of enzymes, their proteolytic activity was also tested after their incorporation to the wound dressings. Furthermore, the prepared bioactive wound dressings were analyzed for possible cytotoxic effect on human keratinocytes. Finally, the wound dressing with combined content of active substances was created and also characterized for the rate of substance release, proteolytic activity and cytotoxicity. Antimicrobial activity of this wound dressings, against two selected strains of microorganisms: Escherichia coli and Staphylococcus epidermidis, was also evaluated.

Thesis (M.S.)--University of Michigan, 1969.

Thesis (M.S.)--University of Michigan, 1969.

No / Wound pain, odour and exudate have a major impact on patient quality of life. Understanding the management of these core components of wound healing is essential if patient outcomes are to be optimised. This paper discusses the role and types of exudate, the impact of high viscosity exudate on management and what to consider when selecting an appropriate dressing with the aim of restoring a satisfactory moist wound environment for healing.

Diabetes is a growing public health problem that can lead to serious complications for the pa-tient such as foot ulcers and amputations. For affected patients the foot ulcers causes suffer-ing, pain and impaired health. The foot ulcers also contribute to major costs to the society and affects healthcare resources hard. A large part of the district nurse's work consists of wound care. Therefore it is important that the district nurse possess adequate knowledge of wound dressings to promote wound healing and thereby shorten the wound healing time. The aim of the study was to examine the wound healing time due to treatment with antiseptic or non-antiseptic dressings in elderly patients with diabetes and foot ulcers. The method used was a quantitative register study with a retrospective and descriptive design. Patients included in the study were 241 men and women aged ≥ 65 years with diabetes and healed foot ulcers. Men were represented by 68 % (n=164) and women by 32 % (n=77). The results showed no signif-icant difference in wound healing time due to treatment with antiseptic or non-antiseptic dressings. The most common non-antiseptic dressing used was polyurethane foam and the most common antiseptic dressing used was silver dressing. More research to compare wound healing time between non-antiseptic and antiseptic dressings in elderly patients with diabetes and foot ulcers are needed. District nurses need to increase their knowledge within different dressings and its positive and negative effects.

Orientador: Winston Bonetti Yoshida / Coorientador: Luciana Patrícia Fernandes Abbade / Banca: José Aderval Aragão / Banca: Marcone Lima Sobreira / Banca: Beatriz Gultton Renaud / Banca: Marcelo José Almeida / Resumo: A UV traduz um dos estágios mais avançados da doença venosa crônica (DVC), e esta apresenta elevada morbidade pela sua cronificação e recidivas frequentes. Constitui importante problema de saúde pública por alterar a qualidade de vida do indivíduo e elevar o ônus público, já que os tratamentos são longos e dispendiosos. Apesar dos fatores de risco e a etiopatogenia desta doença serem conhecidos, grande parte da população usuária do sistema público de saúde não possui diagnóstico e tratamento precoces da DVC, resultando assim em evolução clínica tormentosa da doença. A dificuldade de avaliação com profissionais especializados predispõe a evolução da UV. Quando manejadas de formas inadequadas, as UVs tendem a tornar crônico o processo de cicatrização e ficam sujeitas a complicações como colonização crítica e infecção de partes moles. Esta revisão procura reunir informações atualizadas sobre a epidemiologia da DVC (enfocando principalmente dados do Brasil). Além disso, serão discutidos os fatores de risco, a etiopatogenia da UV e suas manifestações clínicas. Finalmente será feita uma atualização sobre os métodos auxiliares do processo de cicatrização da UV, expondo os avanços ao conhecimento relacionados a esta área, incluindo o preparo do leito da úlcera. O objetivo é propor mudanças que favoreçam a quebra do ciclo pernicioso da UV / Abstract: The VU is one of the most advanced stage' s chronic venous disease (CVD), and it has a high morbidity, because your recidivates are chronics and happens frequently. It is an important public health problem, because it modifies the quality of an individual and put up the public costs, since the medical treatment are longs and expensive. In spite of the risk factors and the studies of this disease are knew, a very part of the population, that use the public health utilities, don't have diagnosis and CVD'S precocious medical treatment, for this reason the disease evolution is very hard. There is the evolution of the VU, because it is very difficult to evaluate it with an expert professional. The VUs can become chronics in a healing process, when they are badly controlled; they can dominate it and contaminate the soft parts. The objective of this revision is to join current in formations about CVD's epidemiology (mainly Brazilian documents). Besides, the risk factors, the VU's path physiology and their clinic manifestations will be discussed Finally, will be done an update about the auxiliary methods of the VU's healing process, showing the know advances in this area, and how to prepare an ulcer bed. The object is to suggest changes that finish the VU's pernicious cycle / Doutor

Orientador: Elenice Deffune / Banca: Lucia Silva / Banca: Aparecida Vitória Gonçalves e Souza / Resumo: As Feridas Crônicas (FC) constituem um desafio constante para os laboratórios farmacêuticos. O Hemocentro de Botucatu desenvolve há 13 anos produtos formulados a partir do Plasma Fresco e do Concentrado de Plaquetas excedentes da prática clínica. Um destes produtos, bem estabelecidos e testados é o gel laminar de plaquetas (Biogel ou GP). Pesquisas na área de enfermagem identificaram oportunidades de melhorias para o Biogel sendo proposto nova formulação: membrana de quitosana enriquecida com hormônios plaquetários (Quitogel). Após estudos preliminares foi delineado o projeto de estudo de fase I, em pacientes portadores de FC utilizando o Quitogel comparando com o GP. Trata-se de um estudo prospectivo, do tipo ensaio clínico controlado, e teve como objetivo comparar o desempenho da membrana de quitosana dopada com hormônios plaquetários versus Gel de plaquetas estabelecendo o perfil de pacientes atendidos. Nos últimos 24 meses foram atendidos 135 novos casos de FC, sendo 45 do sexo masculino, com idade média de 49,57 anos e o tempo de ferida aberta foi de 87,57 meses. Do sexo feminino foram 90 casos, com média de idade de 52,91 anos e tempo médio de ferida aberta foi de 114,76 meses. Quanto ao tipo de úlcera, 81% foram venosas para mulheres contra 64% para homens. As lesões crônicas traumáticas (9%) foram mais prevalentes em homens, contra 2% em mulheres e as feridas diabéticas atingiram mais os homens (11%). Dos produtos comercializados mais usados pelos pacientes, destacam-se a colagenase (16%), sulfadiazina de prata (12%), fibrase® (10%), papaína (6%), Safgel®(5%), hidrogéis 5%. Foi identificado alto índice de automedicação, fato este, comprometedor do resultado do tratamento das FC, onde 33(44,55%), pacientes informavam ter um produto prescrito, mas usam voluntariamente outros 2 não prescritos. Destes 135 pacientes, participaram do estudo 27 deles, perfazendo um total de ... / Abstract: Chronic wounds (CW are a constant challenge for pharmaceutical companies. The Blood Center of Botucatu develops products formulated 13 years ago from Fresh Plasma and platelets concentrate excess clinical practice. One of these products is well established and tested laminar platelet gel (Biogel/PG). Research in nursing identified opportunities for improvements to the Biogel/PG being proposed new wording: chitosan membrane enriched with platelet hormones (Quitogel). After preliminary studies have outlined the design of a phase I study in patients with CF using the Quitogel compared with Biogel/GP. This is a prospective, controlled clinical trial type, and aimed to compare the performance of the chitosan membrane doped with hormones versus Biogel/PG establishing the profile of patients seen. The past 24 months were served 135 new cases of CW, 45 male, mean age of 49.57 years and the time of open wound was 87.57 months. Females were 90 cases, with a mean age of 52.91 years and mean duration of open wound was 114.76 months. Regarding the type of ulcer, 81% were venous for women versus 64% for men. Chronic traumatic injuries (9%) were more prevalent in men, compared with 2% in women and diabetic wounds hit men (11%) more. Of marketed products most used by patients, include collagenase (16%), silver sulfadiazine (12%), fibrase ® (10%), papain (6%), Safgel ® (5%), 5% hydrogels. High rate of self-medication, a fact, compromising the outcome of the treatment of CW, where 33 (44.55%), was identified patients had reported having a prescribed product, but use the other 2 did not prescribed. Of these 135 patients, 27 of them participated in the study, a total of 31 lesions that were followed for 90 days. Comparison of the two products (Biogel/GP versus Quitogel), it was observed that in the preparation of doped chitosan membrane is easy storage (room temperature) and hydration with saline, gradually releases the hormones platelet does not favor ... / Mestre

<p>Silver was used for its antimicrobial effect by the ancient Greeks, long before the existence of microorganisms were first suspected. Nowadays a wide range of antimicrobial dressings containing silver, either incorporated within or applied on the dressings, are available for clinical use. This type of dressings is designed to provide the antimicrobial activity of silver in a more convenient application.</p><p>The aim with this master thesis was to evaluate if silver release and antimicrobial effect of nine silver containing dressings are dependent on the test medium and if there is any relation between silver release and antimicrobial effect.</p><p>Release of silver and antimicrobial effect was evaluated by using a 6-well co-culture system, with inoculated test medium in the wells and dressing pieces in the culture well inserts. Three different test media with increased complexity and nutrient value were inoculated with either</p><p>Results show that release of silver depends on the test fluid used; for phosphate buffered saline (PBS), the silver concentration was as most 1.2 ppm, but for a complex media containing calf serum (SWF), it varied from 9 ppm to 134 ppm. The viable counts in PBS were reduced by at least 3 log units for all dressings and bacteria, whereas in SWF there were no reduction and instead growth was observed. In general, a high release resulted in less bacterial growth. Results also indicated that kinetics of silver release affect the antimicrobial effect. It is likely to assume that it is important for a dressing to release silver quickly.</p><p>It has previously not been possible to correlate silver release of wound care dressings and antimicrobial effect, since the two factors have been measured in different test systems and in different media. Since both factors depend on test medium and method used, it is shown in the present study that it is important to use relevant test medium for in-vitro evaluation. When measuring silver release and antimicrobial effect in the same test system, a relation is found.</p>