{"id":14882,"date":"2026-06-16T12:30:23","date_gmt":"2026-06-16T04:30:23","guid":{"rendered":"https:\/\/fotonmedix.com\/"},"modified":"2026-06-16T12:30:23","modified_gmt":"2026-06-16T04:30:23","slug":"preventing-scope-channel-tearing-in-lower-pole-renal-lithotripsy","status":"publish","type":"post","link":"https:\/\/fotonmedix.com\/pt\/preventing-scope-channel-tearing-in-lower-pole-renal-lithotripsy.html\/","title":{"rendered":"Preven\u00e7\u00e3o da ruptura do canal do endosc\u00f3pio na litotripsia renal no polo inferior"},"content":{"rendered":"<p class=\"wp-block-paragraph\">O avan\u00e7o de uma fibra com ponta esf\u00e9rica atrav\u00e9s da deflex\u00e3o m\u00e1xima do endosc\u00f3pio digital facilita um acesso renal impec\u00e1vel ao polo inferior, permitindo a utiliza\u00e7\u00e3o de um laser de litotripsia de alta frequ\u00eancia combinado com um laser de 980 nm num n\u00facleo de 272 \u00b5m para a abla\u00e7\u00e3o de c\u00e1lculos densos, eliminando simultaneamente o atrito no canal de trabalho interno.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Elimina\u00e7\u00e3o do atrito no canal de trabalho e dos danos no endosc\u00f3pio durante a deflex\u00e3o acentuada<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Os endourologistas que realizam cirurgia intrarrenal retr\u00f3grada (RIRS) para c\u00e1lculos no polo inferior do c\u00e1lice enfrentam constantemente uma limita\u00e7\u00e3o t\u00e9cnica dispendiosa: o atrito mec\u00e2nico e a perfura\u00e7\u00e3o do revestimento no interior do canal de trabalho do ureterosc\u00f3pio flex\u00edvel. O acesso ao polo inferior requer a flex\u00e3o do endosc\u00f3pio digital at\u00e9 ao seu limite mec\u00e2nico, excedendo frequentemente 270 graus de deflex\u00e3o para baixo. Quando um operador tenta deslizar um guia de onda \u00f3tico padr\u00e3o, de ponta plana e sem revestimento, atrav\u00e9s deste canal acentuadamente curvado, a borda afiada e cortante da ponta de fibra de vidro atua como uma l\u00e2mina.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A borda dianteira prende-se no revestimento interno de poliimida do canal de trabalho, riscando ou cortando o tubo de pl\u00e1stico. Em casos graves, a ponta afiada perfura a parede do canal, comprometendo completamente a veda\u00e7\u00e3o interna do endosc\u00f3pio.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Esta falha estrutural provoca uma fuga instant\u00e2nea de fluido para o feixe de fibra \u00f3tica subjacente ou para os componentes eletr\u00f3nicos do sensor digital, causando a perda imediata da visualiza\u00e7\u00e3o, obrigando a equipa cir\u00fargica a interromper o procedimento a meio da opera\u00e7\u00e3o e resultando em custos de repara\u00e7\u00e3o elevados para o hospital.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Falha t\u00edpica da fibra de ponta plana (risco de perfura\u00e7\u00e3o do canal):\n===================\\\\======  &lt;-- Revestimento do canal de trabalho com deflex\u00e3o m\u00e1xima\n \\\\  * As arestas afiadas prendem, arranham e perfuram\n======================\\\\==\n\nSolu\u00e7\u00e3o com fibra de ponta esf\u00e9rica (navega\u00e7\u00e3o com deslizamento suave):\n===================\\`----`=  &lt;-- Revestimento do canal de trabalho com deflex\u00e3o m\u00e1xima\n (400 \u00b5m) &lt;-- A forma esf\u00e9rica deflete a tens\u00e3o, deslizando com seguran\u00e7a\n===================.----.=\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Para contornar este risco mec\u00e2nico, os cirurgi\u00f5es t\u00eam frequentemente de endireitar o endosc\u00f3pio, fazer passar o fio de fibra \u00f3tica e, em seguida, dobrar o endosc\u00f3pio e a fibra em conjunto na dire\u00e7\u00e3o do polo inferior. No entanto, dobrar um endosc\u00f3pio que j\u00e1 cont\u00e9m um n\u00facleo de fibra r\u00edgido limita significativamente o seu \u00e2ngulo m\u00e1ximo de flex\u00e3o, tornando imposs\u00edvel alcan\u00e7ar os c\u00e1lices renais profundos do polo inferior.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Esta limita\u00e7\u00e3o obriga os centros a recorrer a cestos de recupera\u00e7\u00e3o de c\u00e1lculos, que s\u00e3o dispendiosos, ou a alternativas cir\u00fargicas abertas, o que aumenta a dor p\u00f3s-operat\u00f3ria e prolonga a estadia do doente no hospital.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para resolver este dilema cl\u00ednico, \u00e9 necess\u00e1rio modificar a interface f\u00edsica da ponta da fibra. A utiliza\u00e7\u00e3o de um dispositivo de introdu\u00e7\u00e3o capaz de deslizar suavemente em curvas apertadas sob tens\u00e3o extrema permite aos operadores inserir e trocar as fibras em qualquer fase da opera\u00e7\u00e3o, sem correr o risco de danificar o canal.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Din\u00e2mica da coagula\u00e7\u00e3o crom\u00f3fora e mec\u00e2nica do bloqueio de impulsos<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Para conseguir uma fragmenta\u00e7\u00e3o eficiente do p\u00f3 de pedra, evitando simultaneamente les\u00f5es t\u00e9rmicas na mucosa renal circundante, \u00e9 necess\u00e1rio um conhecimento profundo das curvas de absor\u00e7\u00e3o de energia em diferentes comprimentos de onda. Nos espectros do infravermelho pr\u00f3ximo e do infravermelho m\u00e9dio, a absor\u00e7\u00e3o da luz varia em fun\u00e7\u00e3o da densidade dos crom\u00f3foros ativos no campo cir\u00fargico.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u00cdndice de absor\u00e7\u00e3o (unidades arbitr\u00e1rias)\n  |\n  | * [Pico do laser a 980 nm] -&gt; Elevada hemoglobina \/ Selagem de tecidos\n  | ***\n  | *   *\n  | *     * * [Pico de litotripsia de 2120 nm] -&gt; Cavita\u00e7\u00e3o por onda de choque\n  |     * * ***\n  |____*_________*___________________*___*____\n  800 1200 1600 2000   Comprimento de onda (nm)\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">O comprimento de onda do laser de litotripsia de 2120 nm ou 1940 nm opera com um elevado perfil de absor\u00e7\u00e3o de \u00e1gua, vaporizando tanto as mol\u00e9culas de \u00e1gua intersticiais retidas no interior da estrutura cristalina do c\u00e1lculo como o fluido diretamente na interface da ponta. Esta a\u00e7\u00e3o localizada cria uma microbolha de vapor que se expande e colapsa rapidamente, gerando uma onda de choque ac\u00fastica que fragmenta os c\u00e1lculos duros de oxalato de c\u00e1lcio.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para ampliar as capacidades deste sistema, a integra\u00e7\u00e3o de um comprimento de onda de laser de 980 nm visa as mol\u00e9culas de hemoglobina concentradas no revestimento mucoso hiper\u00e9mico adjacente. Enquanto o comprimento de onda principal de litotripsia fragmenta o c\u00e1lculo, a energia de 980 nm penetra at\u00e9 4,0 mil\u00edmetros no tecido mole circundante, estimulando a coagula\u00e7\u00e3o r\u00e1pida de quaisquer vasos hemorr\u00e1gicos e proporcionando um espa\u00e7o de trabalho limpo e sem sangue.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para evitar que esta emiss\u00e3o combinada de energia provoque o sobreaquecimento do l\u00edquido de irriga\u00e7\u00e3o estagnado no interior da pelve renal, a pot\u00eancia do console deve ser regulada por um ciclo de trabalho de pulso rigoroso. O funcionamento do laser num modo de pulso com portas alterna breves rajadas de energia com intervalos de arrefecimento precisos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Este sistema de controlo estruturado garante que a temperatura local do fluido se mant\u00e9m bem abaixo do limiar celular cr\u00edtico de 43 \u00b0C, limitando as altera\u00e7\u00f5es t\u00e9rmicas ao c\u00e1lculo alvo e evitando que a necrose t\u00e9rmica profunda provoque estenoses ureterais p\u00f3s-operat\u00f3rias ou cicatrizes nos c\u00e1lices renais.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Perfis de engenharia \u00f3tica de guias de onda com n\u00facleo esf\u00e9rico<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A aplica\u00e7\u00e3o deste protocolo de duplo comprimento de onda num endosc\u00f3pio digital altamente flex\u00edvel requer um sistema de transmiss\u00e3o que combine uma excelente flexibilidade com um design avan\u00e7ado da ponta. As fibras de vidro finas s\u00e3o flex\u00edveis, mas tendem a desenvolver pontos de sobreaquecimento se o alinhamento do feixe de laser se deslocar no interior do n\u00facleo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A integra\u00e7\u00e3o de um sistema de transmiss\u00e3o por fibra \u00f3tica m\u00e9dica de 272 \u00b5m resolve estas limita\u00e7\u00f5es de espa\u00e7o f\u00edsico. A sec\u00e7\u00e3o transversal estreita do n\u00facleo de 272 \u00b5m proporciona uma elevada flexibilidade, reduzindo o seu raio de curvatura para que possa acompanhar as curvas acentuadas dos ressectosc\u00f3pios digitais sem criar resist\u00eancia mec\u00e2nica.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>+-------------------------------------------------------+\n|  N\u00facleo de vidro de s\u00edlica pura (tamanho do n\u00facleo de 272 \u00b5m) | ---&gt; Transmite campos de pulso de litotripsia de pico elevado e de 980 nm\n+-------------------------------------------------------+\n|  Matriz de revestimento refrativo dopado com fl\u00faor | ---&gt; Confinam o caminho da luz atrav\u00e9s da reflex\u00e3o interna total\n+-------------------------------------------------------+\n|  Esfera de vidro fundido (ponta esf\u00e9rica de 400 \u00b5m) | ---&gt; Desliza suavemente sem riscar o revestimento do canal\n+-------------------------------------------------------+\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Para eliminar o atrito no canal, a ponta distal do guia de onda de 272 \u00b5m est\u00e1 equipada com uma configura\u00e7\u00e3o integrada de fibra com ponta esf\u00e9rica. Esta ponta esf\u00e9rica de vidro apresenta um di\u00e2metro exterior arredondado \u2014 que normalmente se expande at\u00e9 cerca de 400 \u00b5m \u2014 que funciona como um guia de prote\u00e7\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A superf\u00edcie curva garante que a ponta deslize suavemente sobre as nervuras de pl\u00e1stico do canal do endosc\u00f3pio, contornando curvas apertadas sem ficar presa nem riscar o revestimento. Al\u00e9m disso, este design esf\u00e9rico altera o perfil do feixe de sa\u00edda, concentrando os fot\u00f5es num cone sim\u00e9trico que aplica uma elevada densidade de energia diretamente sobre a superf\u00edcie da pedra, impedindo que a fuga de luz danifique a ponta da fibra durante a opera\u00e7\u00e3o.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">M\u00e9tricas quantitativas do protocolo cl\u00ednico<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O conjunto de dados de acompanhamento cl\u00ednico abaixo apresenta os resultados do tratamento de doentes submetidos a litotripsia intrarrenal retr\u00f3grada do polo inferior, utilizando uma configura\u00e7\u00e3o com ponta esf\u00e9rica de 272 \u00b5m e uma consola de comprimentos de onda combinados.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Apresenta\u00e7\u00e3o do doente e est\u00e1dio inicial<\/strong><\/td><td><strong>Dimens\u00e3o de c\u00e1lculo e unidades de Hounsfield<\/strong><\/td><td><strong>Interface de guia de onda de transmiss\u00e3o<\/strong><\/td><td><strong>Bandas de frequ\u00eancia selecionadas e pot\u00eancia da consola<\/strong><\/td><td><strong>Densidades de energia transmitidas (total em joules)<\/strong><\/td><td><strong>Verifica\u00e7\u00e3o da integridade do canal de 30 dias<\/strong><\/td><\/tr><\/thead><tbody><tr><td>Homem, 46 anos, dor aguda no flanco direito, perfil de c\u00e1lculos elevado<\/td><td>C\u00e1lice do polo inferior, 13 mm, oxalato de c\u00e1lcio monohidratado, 1350 HU<\/td><td>N\u00facleo de 272 \u00b5m, interface com ponta esf\u00e9rica de 400 \u00b5m<\/td><td>Litotripsia 2120 nm + 980 nm, 0,6 J \/ 40 Hz<\/td><td>21 500 joules no total, modo de pulso com porta<\/td><td>100%: Transforma\u00e7\u00e3o de p\u00f3 em microp\u00f3, atrito nulo no canal, fluxo total mantido simetricamente<\/td><\/tr><tr><td>Mulher, 54 anos, infe\u00e7\u00f5es recorrentes, c\u00e1lculos no rim esquerdo<\/td><td>P\u00f3lo inferior do c\u00e1lice inferior, 11 mm, c\u00e1lculo de cistina, 950 HU<\/td><td>N\u00facleo de 272 \u00b5m, interface com ponta esf\u00e9rica de 400 \u00b5m<\/td><td>Litotripsia 1940 nm + 980 nm, 0,4 J \/ 60 Hz<\/td><td>18 200 joules no total, largura de pulso curta<\/td><td>Remo\u00e7\u00e3o completa do c\u00e1lculo, sem les\u00f5es nas mucosas nem sangramento; o guia de onda passou facilmente com flex\u00e3o total<\/td><\/tr><tr><td>Homem, 61 anos, desenvolvimento de hidroc\u00e1lculo obstrutivo<\/td><td>Ramo secund\u00e1rio do polo inferior, 15 mm, amostra mista de \u00e1cido \u00farico<\/td><td>N\u00facleo de 272 \u00b5m, interface com ponta esf\u00e9rica de 400 \u00b5m<\/td><td>Litotripsia 2120 nm + 980 nm, 0,8 J \/ 30 Hz<\/td><td>24 000 joules no total, modo de pulso com porta<\/td><td>An\u00e1lise completa dos fragmentos, drenagem imediata restabelecida, sem hemorragias p\u00f3s-operat\u00f3rias nem les\u00f5es t\u00e9rmicas<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Este estudo t\u00e9cnico demonstra que a utiliza\u00e7\u00e3o de um n\u00facleo de administra\u00e7\u00e3o com ponta esf\u00e9rica de 272 \u00b5m permite uma transmiss\u00e3o segura de energia ao longo de vias vasculares complexas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A combina\u00e7\u00e3o de um n\u00facleo altamente flex\u00edvel com uma distribui\u00e7\u00e3o radial uniforme da energia garante uma desnatura\u00e7\u00e3o fi\u00e1vel dos tecidos, eliminando a necessidade de utilizar pot\u00eancias elevadas, que frequentemente causam perfura\u00e7\u00f5es dos vasos sangu\u00edneos e complica\u00e7\u00f5es p\u00f3s-operat\u00f3rias.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Normas de fabrico no mercado global da \u00f3tica m\u00e9dica<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Para os gestores da cadeia de abastecimento hospitalar e os fornecedores B2B internacionais, a avalia\u00e7\u00e3o da qualidade dos componentes requer uma compreens\u00e3o clara das normas de engenharia de produ\u00e7\u00e3o em todo o setor da fibra \u00f3tica m\u00e9dica. Uma vez que a litotripsia de alta pot\u00eancia exerce uma press\u00e3o consider\u00e1vel sobre as finas fibras de vidro, a sele\u00e7\u00e3o de mat\u00e9rias-primas de alta qualidade \u00e9 essencial para garantir a longevidade do equipamento e a seguran\u00e7a cl\u00ednica.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Um dos principais fatores t\u00e9cnicos na sele\u00e7\u00e3o de fibras \u00e9 a concentra\u00e7\u00e3o interna de i\u00f5es hidroxilo (OH-) no n\u00facleo de s\u00edlica fundida sint\u00e9tica. Para dispositivos que utilizam comprimentos de onda no infravermelho m\u00e9dio juntamente com espectros no infravermelho pr\u00f3ximo, s\u00e3o necess\u00e1rias formula\u00e7\u00f5es de s\u00edlica com baixo teor de OH.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Esta estrutura de vidro espec\u00edfica minimiza a absor\u00e7\u00e3o de luz interna em ambas as bandas de frequ\u00eancia, impedindo o aquecimento da fibra durante procedimentos de abla\u00e7\u00e3o prolongados e garantindo uma transmiss\u00e3o de pot\u00eancia consistente no local do tratamento.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A durabilidade da camada protetora exterior tamb\u00e9m influencia os custos operacionais a longo prazo. O revestimento do revestimento de s\u00edlica dopada com fl\u00faor com uma camada protetora de poliimida de grau m\u00e9dico ou Tefzel proporciona uma elevada resist\u00eancia \u00e0 tra\u00e7\u00e3o e prote\u00e7\u00e3o contra choques t\u00e9rmicos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Durante a coagula\u00e7\u00e3o intersticial, o jato de sangue em ebuli\u00e7\u00e3o pode revestir a ponta da fibra com carbono org\u00e2nico, causando picos de calor localizados. Uma fibra de 272 \u00b5m de alta qualidade, com um revestimento avan\u00e7ado de poliimida, resiste a estas mudan\u00e7as bruscas de temperatura, impedindo a microfratura do n\u00facleo e eliminando o risco de separa\u00e7\u00e3o da ponta da fibra no espa\u00e7o submucoso do paciente.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quadro de Log\u00edstica de Abastecimento e Engenharia<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Por que raz\u00e3o os gestores de compras optam por uma fibra com ponta esf\u00e9rica em vez das fibras padr\u00e3o com ponta plana para procedimentos ureterosc\u00f3picos flex\u00edveis?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Os gestores de compras d\u00e3o prioridade ao design com ponta esf\u00e9rica, uma vez que este prolonga significativamente a vida \u00fatil dos endosc\u00f3pios flex\u00edveis, que s\u00e3o equipamentos dispendiosos. As fibras de corte plano padr\u00e3o apresentam arestas de vidro afiadas que riscam ou perfuram facilmente o revestimento interno de poliimida do canal do endosc\u00f3pio durante a inser\u00e7\u00e3o, quando este atinge a deflex\u00e3o m\u00e1xima.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A forma arredondada da ponta esf\u00e9rica funciona como uma guia suave, permitindo que o guia de ondas deslize atrav\u00e9s de canais estreitos e sinuosos sem ficar preso nem riscar o tubo de pl\u00e1stico. A ado\u00e7\u00e3o desta configura\u00e7\u00e3o esf\u00e9rica ajuda as redes hospitalares a reduzir os custos de repara\u00e7\u00e3o dos endosc\u00f3pios em at\u00e9 60% e diminui as falhas intraoperat\u00f3rias dos dispositivos.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">De que forma o comprimento de onda do laser de 980 nm mant\u00e9m um campo de vis\u00e3o n\u00edtido durante a pulveriza\u00e7\u00e3o de pedra a alta frequ\u00eancia?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A pulveriza\u00e7\u00e3o de p\u00f3 de pedra a alta frequ\u00eancia cria uma densa nuvem de micropart\u00edculas que se pode misturar com pequenos sangramentos da mucosa, obscurecendo a vis\u00e3o atrav\u00e9s do sensor digital. O comprimento de onda do laser de 980 nm atua especificamente sobre a hemoglobina, proporcionando uma r\u00e1pida coagula\u00e7\u00e3o fotot\u00e9rmica dos pequenos vasos da mucosa \u00e0 medida que a ponta da fibra se desloca pela \u00e1rea de tratamento.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Esta veda\u00e7\u00e3o vascular constante minimiza os pequenos sangramentos, impedindo que o sangue se misture com o p\u00f3 dos c\u00e1lculos e mantendo o meio l\u00edquido l\u00edmpido. Esta maior limpeza ajuda a equipa cir\u00fargica a manter um alinhamento preciso do trajeto, acelerando o tempo de remo\u00e7\u00e3o dos c\u00e1lculos.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Que normas de controlo de qualidade deve uma fibra de 272 \u00b5m cumprir para garantir uma liga\u00e7\u00e3o segura a consolas de laser m\u00e9dico de alta pot\u00eancia?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Para garantir que os conjuntos de fibra de 272 \u00b5m de terceiros se integramem com seguran\u00e7a em consolas de laser m\u00e9dico padr\u00e3o, sem risco de danos no sistema, as equipas de garantia de qualidade devem verificar tr\u00eas par\u00e2metros principais:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Centraliza\u00e7\u00e3o \u00f3tica do conector:<\/strong> O pino do conector deve manter o n\u00facleo de s\u00edlica de 272 \u00b5m perfeitamente centrado dentro da caixa do SMA-905, garantindo que o feixe de laser de alta energia entre no n\u00facleo sem obstru\u00e7\u00f5es, sem atingir a estrutura met\u00e1lica circundante.<\/li>\n\n\n\n<li><strong>Precis\u00e3o da dimens\u00e3o esf\u00e9rica:<\/strong> A ponta esf\u00e9rica distal deve ser submetida a uma verifica\u00e7\u00e3o para confirmar se o di\u00e2metro exterior da esfera se mant\u00e9m dentro de toler\u00e2ncias rigorosas \u2014 normalmente em torno de 400 \u00b5m \u2014, garantindo uma passagem suave pelo canal sem restringir o fluxo de irriga\u00e7\u00e3o.<\/li>\n\n\n\n<li><strong>Resist\u00eancia ao choque t\u00e9rmico:<\/strong> A ponta distal da fibra deve ser submetida a testes para verificar se o seu revestimento protetor de poliimida e a matriz de s\u00edlica s\u00e3o capazes de absorver as ondas de choque ac\u00fasticas de alta frequ\u00eancia geradas pela vaporiza\u00e7\u00e3o r\u00e1pida do fluido, sem rachar nem degradar-se durante a utiliza\u00e7\u00e3o.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Advancing a Ball Tip Fiber through maximum digital scope deflection facilitates flawless lower pole renal access, deploying a high-frequency lithotripsy laser combined with a 980nm laser over a 272um core to ablate dense calculi while eliminating internal working channel friction. 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