Estudo sobre agulhas hipodérmicas: variação do esforço de penetração em um tecido artificial
Carregando...
Data
2017-08-01
Autores
Cavassana, Sidnei [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
O medo da dor relacionada à injeção é um empecilho à terapia de injetáveis. As injeções hipodérmicas são motivos de grande ansiedade e de reduzida adesão à aplicação subcutânea de insulina para o controle glicêmico em diabéticos ou no tratamento da esclerose múltipla, aumentando o risco de complicações e mortalidade. Neste trabalho foi analisado como algumas das características da agulha podem influenciar a sensação de dor na injeção. Mediu-se o esforço de penetração de agulhas em um tecido artificial (modelo substituto da pele), para diferentes diâmetros de cânula, rugosidade, profundidade de penetração, lubrificação e ângulos do bisel da ponta perfurante. Este estudo visou encontrar alternativas para facilitar a aplicação e a autoaplicação de injeções hipodérmicas, aumentando a segurança e conforto, diminuindo a intensidade da dor percebida pelo paciente. Para isso, analisou-se no projetor de perfil e no MEV o bisel de agulhas usadas repetidas vezes para verificar a perda do perfil ou a formação de rebarbas que possam dificultar a penetração ou traumatizar o tecido durante o reuso de agulhas. Também foi analisado sob o ponto de vista mecânico, o que pode ser feito para prevenir que as agulhas usadas na aplicação subcutânea não atinjam inadvertidamente o músculo. O maior esforço de penetração observado nas agulhas com maior ângulo do bisel é responsável pela percepção de dor do paciente.
Fear of injection-related pain is a drawback to injectable therapy. Hypodermic injections are a cause for great anxiety and reduced adherence to the subcutaneous application of insulin for glycemic control in diabetics or in the treatment of multiple sclerosis, increasing the risk of complications and mortality. In this work, it was analyzed how some of the characteristics of the needle can influence the sensation of pain in the injection. The needle penetration effort was measured in an artificial tissue (substitute skin model) for different cannula diameters, roughness, depth of penetration, lubrication and angles of the perforating tip bevel. This study aimed to find alternatives to facilitate the application and self-application of hypodermic injections, increasing safety and comfort, reducing the pain intensity perceived by the patient. To do this, the bevel of needles used repeatedly was analyzed in the profile projector and SEM to verify the loss of the profile or the formation of burrs that could hamper the penetration or traumatize the tissue during the reuse of needles. It has also been mechanically analyzed, which can be done to prevent that the needles used in the subcutaneous application do not inadvertently reach the muscle. The greater penetration effort observed in the needles with greater angle of the bevel is responsible for the patient's perception of pain.
Fear of injection-related pain is a drawback to injectable therapy. Hypodermic injections are a cause for great anxiety and reduced adherence to the subcutaneous application of insulin for glycemic control in diabetics or in the treatment of multiple sclerosis, increasing the risk of complications and mortality. In this work, it was analyzed how some of the characteristics of the needle can influence the sensation of pain in the injection. The needle penetration effort was measured in an artificial tissue (substitute skin model) for different cannula diameters, roughness, depth of penetration, lubrication and angles of the perforating tip bevel. This study aimed to find alternatives to facilitate the application and self-application of hypodermic injections, increasing safety and comfort, reducing the pain intensity perceived by the patient. To do this, the bevel of needles used repeatedly was analyzed in the profile projector and SEM to verify the loss of the profile or the formation of burrs that could hamper the penetration or traumatize the tissue during the reuse of needles. It has also been mechanically analyzed, which can be done to prevent that the needles used in the subcutaneous application do not inadvertently reach the muscle. The greater penetration effort observed in the needles with greater angle of the bevel is responsible for the patient's perception of pain.
Descrição
Palavras-chave
Agulhas hipodérmicas, Bisel, Cânula, Dor, Hypodermic needles, Bevel, Cannula, Ache