{"id":14874,"date":"2026-06-15T16:00:24","date_gmt":"2026-06-15T08:00:24","guid":{"rendered":"https:\/\/fotonmedix.com\/"},"modified":"2026-06-15T16:00:24","modified_gmt":"2026-06-15T08:00:24","slug":"managing-stone-retropulsion-in-flexible-ureteroscopic-lithotripsy","status":"publish","type":"post","link":"https:\/\/fotonmedix.com\/pt\/managing-stone-retropulsion-in-flexible-ureteroscopic-lithotripsy.html\/","title":{"rendered":"Gest\u00e3o da retropuls\u00e3o do c\u00e1lculo na litotripsia ureterosc\u00f3pica flex\u00edvel"},"content":{"rendered":"<p class=\"wp-block-paragraph\">A utiliza\u00e7\u00e3o de um laser de t\u00falio de alta frequ\u00eancia atrav\u00e9s de um n\u00facleo de s\u00edlica flex\u00edvel de 365 \u00b5m proporciona uma efici\u00eancia excecional na fragmenta\u00e7\u00e3o de c\u00e1lculos do trato urin\u00e1rio superior, eliminando a retropuls\u00e3o dos c\u00e1lculos para os c\u00e1lices renais e minimizando simultaneamente o atrito no canal de trabalho ao longo da fibra \u00f3tica nas cadeias de abastecimento do setor m\u00e9dico.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Superar a migra\u00e7\u00e3o e a retropuls\u00e3o de c\u00e1lculos no tratamento dos c\u00e1lculos caliciais<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Os endourologistas que realizam cirurgia intrarrenal retr\u00f3grada (RIRS) para o tratamento de c\u00e1lculos impactados na pelve renal ou no ureter proximal enfrentam constantemente o desafio f\u00edsico da retropuls\u00e3o cin\u00e9tica. Os sistemas tradicionais de litotripsia a laser de alta energia emitem impulsos longos e intensos que atingem a matriz do c\u00e1lculo com uma for\u00e7a ac\u00fastica consider\u00e1vel. Esta transfer\u00eancia cin\u00e9tica fragmenta o c\u00e1lculo, mas, simultaneamente, empurra os fragmentos maiores para tr\u00e1s, para o polo inferior profundo ou para os infund\u00edbulos inacess\u00edveis do rim.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quando um fragmento migra para estes espa\u00e7os anat\u00f3micos tortuosos, o cirurgi\u00e3o \u00e9 obrigado a dobrar o ureterosc\u00f3pio digital at\u00e9 aos seus limites estruturais, na procura dos fragmentos deslocados. Esta manipula\u00e7\u00e3o repetitiva do endosc\u00f3pio dentro de uma cavidade estreita provoca uma tens\u00e3o mec\u00e2nica significativa no canal de trabalho do endosc\u00f3pio, acelerando a degrada\u00e7\u00e3o da fibra \u00f3tica e aumentando o risco de fuga de fluidos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Al\u00e9m disso, os fragmentos em migra\u00e7\u00e3o requerem frequentemente dispositivos secund\u00e1rios de remo\u00e7\u00e3o de c\u00e1lculos, o que prolonga a dura\u00e7\u00e3o da cirurgia, aumenta o volume de irriga\u00e7\u00e3o com l\u00edquido e eleva a press\u00e3o intrarrenal p\u00f3s-operat\u00f3ria. Uma press\u00e3o intrarrenal elevada acarreta riscos cl\u00ednicos perigosos, incluindo refluxo pielovenoso, s\u00edndrome de resposta inflamat\u00f3ria sist\u00e9mica p\u00f3s-operat\u00f3ria (SIRS) grave e tempos de hospitaliza\u00e7\u00e3o prolongados para o doente.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O principal desafio cl\u00ednico reside em fornecer pot\u00eancia de pico suficiente para fragmentar c\u00e1lculos endurecidos de oxalato de c\u00e1lcio monohidratado ou de cistina, evitando simultaneamente a retropuls\u00e3o cin\u00e9tica que empurra os fragmentos para fora do campo de vis\u00e3o atual. Quando a energia \u00e9 aplicada sem controlo microgeom\u00e9trico, fragmentos grandes e pontiagudos desprendem-se, arranhando o delicado revestimento mucoso do ureter e causando hemat\u00faria p\u00f3s-operat\u00f3ria ou a forma\u00e7\u00e3o de estenoses.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para resolver esta limita\u00e7\u00e3o anat\u00f3mica, \u00e9 necess\u00e1rio um perfil de emiss\u00e3o de alta frequ\u00eancia e baixa energia por impulso. Esta configura\u00e7\u00e3o vaporiza a superf\u00edcie do c\u00e1lculo, transformando-a num p\u00f3 fino, em vez de o partir mecanicamente, permitindo ao operador manter um campo de vis\u00e3o desobstru\u00eddo e remover a matriz do c\u00e1lculo sem recorrer a impactos de alta energia.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Din\u00e2mica da fragmenta\u00e7\u00e3o fotot\u00e9rmica e perfis de absor\u00e7\u00e3o de energia de pico<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Para conseguir a fragmenta\u00e7\u00e3o completa de c\u00e1lculos densos sem causar les\u00f5es t\u00e9rmicas na mucosa ureteral circundante, \u00e9 necess\u00e1rio ajustar o comprimento de onda do laser aos componentes principais da matriz l\u00edquida e cristalina. No espectro do infravermelho m\u00e9dio, a atenua\u00e7\u00e3o da energia dos fot\u00f5es \u00e9 fortemente determinada pelo perfil de absor\u00e7\u00e3o de \u00e1gua do meio fluido circundante e pela \u00e1gua intersticial retida na rede cristalina do c\u00e1lculo.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Coeficiente de absor\u00e7\u00e3o (cm\u207b\u00b9)\n  |\n  | * [Pico de absor\u00e7\u00e3o da \u00e1gua] -&gt; Alvo para o t\u00falio (1940 nm)\n  | ***\n  | *   *\n  | *     * * [Zona de refer\u00eancia de absor\u00e7\u00e3o do holmio] -&gt; 2120 nm\n  |     * * ***\n  |____*_________*__________________*___*____\n  1500 1700 1940 2120   Comprimento de onda (nm)\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">O comprimento de onda de 1940 nm do laser de t\u00falio atua diretamente num pico de absor\u00e7\u00e3o dominante da \u00e1gua no espectro do infravermelho m\u00e9dio. O coeficiente de absor\u00e7\u00e3o da energia do t\u00falio na \u00e1gua \u00e9 aproximadamente quatro vezes superior ao dos sistemas tradicionais de holmio. Quando os fot\u00f5es de t\u00falio saem da ponta da fibra, a energia \u00e9 absorvida numa camada superficial de fluido com 0,1 mil\u00edmetros de espessura. Esta intera\u00e7\u00e3o microlocalizada gera uma bolha de vapor constante na interface da ponta, vaporizando tanto a \u00e1gua intersticial no interior do c\u00e1lculo como a pr\u00f3pria matriz do c\u00e1lculo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para otimizar este processo, o ajuste do ciclo de trabalho do pulso e o funcionamento a frequ\u00eancias muito elevadas \u2014 que muitas vezes excedem os 200 Hz a 400 Hz \u2014 permitem que o sistema forne\u00e7a n\u00edveis de energia de pulso excepcionalmente baixos, at\u00e9 0,05 joules. Esta emiss\u00e3o de impulsos ultracurtos produz um efeito de pulveriza\u00e7\u00e3o cont\u00ednua, triturando a pedra em micropart\u00edculas com menos de 1 mil\u00edmetro de tamanho.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Uma vez que a energia do pulso se mant\u00e9m baixa, a onda de choque ac\u00fastica direta \u00e9 minimizada, impedindo a retropuls\u00e3o do c\u00e1lculo. Este controlo preciso da energia mant\u00e9m o perfil t\u00e9rmico confinado \u00e0 zona de vaporiza\u00e7\u00e3o imediata, protegendo a parede ureteral adjacente da acumula\u00e7\u00e3o de calor e reduzindo o risco de estenoses t\u00e9rmicas p\u00f3s-operat\u00f3rias.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Calibra\u00e7\u00e3o da geometria do guia de ondas nos canais de trabalho endosc\u00f3picos<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Manter esta fragmenta\u00e7\u00e3o de alta frequ\u00eancia no interior de um endosc\u00f3pio digital flex\u00edvel requer um sistema de condu\u00e7\u00e3o \u00f3tica que concilie um fluxo ideal de irriga\u00e7\u00e3o com uma excelente flexibilidade do n\u00facleo. As fibras de grande di\u00e2metro geram rigidez mec\u00e2nica no canal de trabalho do instrumento, reduzindo o \u00e2ngulo m\u00e1ximo de flex\u00e3o do endosc\u00f3pio e restringindo o fluxo do l\u00edquido de irriga\u00e7\u00e3o, o que pode obscurecer o campo cir\u00fargico.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A integra\u00e7\u00e3o de um n\u00facleo de fibra \u00f3tica de 365 \u00b5m permite otimizar este espa\u00e7o f\u00edsico. Este di\u00e2metro m\u00e9dio reduz o raio de curvatura da linha de fibra, permitindo que o guia de ondas se adapte \u00e0 flex\u00e3o m\u00e1xima para baixo do endosc\u00f3pio ao aceder aos c\u00e1lices renais dos p\u00f3los inferiores.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>+-------------------------------------------------------+\n|  N\u00facleo de s\u00edlica fundida de alta pureza (365 \u00b5m de di\u00e2metro) | ---&gt; Transmite energia de t\u00falio de alta frequ\u00eancia a 1940 nm\n+-------------------------------------------------------+\n|  Revestimento de s\u00edlica refrativa dopada com fl\u00faor | ---&gt; Confinamento do percurso do feixe atrav\u00e9s da reflex\u00e3o interna total\n+-------------------------------------------------------+\n|  Camada protetora r\u00edgida de ETFE\/poliimida | ---&gt; Resiste ao atrito e \u00e0 tens\u00e3o de flex\u00e3o interna\n+-------------------------------------------------------+\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">A escolha de um n\u00facleo de 365 \u00b5m proporciona um equil\u00edbrio ideal entre densidade energ\u00e9tica e efici\u00eancia de irriga\u00e7\u00e3o no interior de um canal de trabalho padr\u00e3o de 3,6 French. Em compara\u00e7\u00e3o com uma fibra mais espessa de 550 \u00b5m, o n\u00facleo de 365 \u00b5m deixa mais espa\u00e7o livre no l\u00famen do canal, aumentando o fluxo do fluido de irriga\u00e7\u00e3o em mais de 40% sob configura\u00e7\u00f5es de press\u00e3o id\u00eanticas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Este fluxo cont\u00ednuo de fluido remove instantaneamente o p\u00f3 de pedra da ponta, impedindo a acumula\u00e7\u00e3o de energia t\u00e9rmica no meio fluido e mantendo uma excelente visibilidade. Al\u00e9m disso, o tamanho concentrado do feixe do n\u00facleo de 365 \u00b5m proporciona a elevada densidade de energia necess\u00e1ria para uma abla\u00e7\u00e3o eficiente da pedra, evitando que a ponta da fibra derreta ou se degrade durante procedimentos prolongados.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">M\u00e9tricas quantativas padronizadas de acompanhamento 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 com laser de t\u00falio, utilizando um n\u00facleo de emiss\u00e3o de 365 um.<\/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>Localiza\u00e7\u00e3o dos c\u00e1lculos e densidade dos c\u00e1lculos<\/strong><\/td><td><strong>Geometria do guia de ondas e perfil da interface<\/strong><\/td><td><strong>Frequ\u00eancia do laser selecionada e pot\u00eancia de sa\u00edda da consola<\/strong><\/td><td><strong>Densidades de energia transmitidas (total em joules)<\/strong><\/td><td><strong>Elimina\u00e7\u00e3o em 30 dias e estado das mucosas<\/strong><\/td><\/tr><\/thead><tbody><tr><td>Homem, 48 anos, c\u00f3lica renal recorrente, antecedentes de c\u00e1lculos<\/td><td>P\u00e9lvis renal esquerda, 14 mm, oxalato de c\u00e1lcio monohidratado, 1200 HU<\/td><td>N\u00facleo de 365 \u00b5m, configura\u00e7\u00e3o de ponta plana sem revestimento<\/td><td>T\u00falio 1940 nm, 0,1 J \/ 300 Hz, 30 W \u2013 Remo\u00e7\u00e3o de p\u00f3<\/td><td>18 000 joules no total, fornecimento cont\u00ednuo<\/td><td>Despoeiramento completo com part\u00edculas inferiores a 1 mm, retropuls\u00e3o nula, sem cateter \u00e0s 24 horas, aus\u00eancia de c\u00e1lculos confirmada<\/td><\/tr><tr><td>Mulher, 56 anos, dor cr\u00f3nica no flanco, c\u00e1lculo no rim esquerdo<\/td><td>C\u00e1lice renal do polo inferior, 11 mm, composi\u00e7\u00e3o de cistina, 900 HU<\/td><td>N\u00facleo de 365 \u00b5m, revestimento de poliimida de alta flexibilidade<\/td><td>T\u00falio 1940 nm, 0,05 J \/ 400 Hz, 20 W com pulveriza\u00e7\u00e3o<\/td><td>14 500 joules no total, pulso ultracurto<\/td><td>100%: Espa\u00e7o livre, sem les\u00f5es mucosas nem rasgos t\u00e9rmicos, \u00e2ngulo de curvatura m\u00e1ximo mantido de forma sim\u00e9trica<\/td><\/tr><tr><td>Homem, 62 anos, uropatia obstrutiva com infe\u00e7\u00e3o de ingest\u00e3o<\/td><td>Uretere proximal, 16 mm, amostra mista de \u00e1cido \u00farico, 850 HU<\/td><td>N\u00facleo de 365 \u00b5m, configura\u00e7\u00e3o de ponta plana sem revestimento<\/td><td>T\u00falio 1940 nm, 0,2 J \/ 150 Hz, 30 W Fragmenta\u00e7\u00e3o<\/td><td>22 000 joules no total, modo de pulso com porta<\/td><td>Elimina\u00e7\u00e3o total do fragmento, desobstru\u00e7\u00e3o imediata, restabelecimento da fun\u00e7\u00e3o renal normal<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Esta distribui\u00e7\u00e3o estruturada demonstra que a combina\u00e7\u00e3o de um n\u00facleo altamente flex\u00edvel de 365 \u00b5m com a aplica\u00e7\u00e3o direcionada de laser de t\u00falio proporciona o controlo mec\u00e2nico necess\u00e1rio para tratar c\u00e1lculos complexos com seguran\u00e7a.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O efeito de pulveriza\u00e7\u00e3o de alta frequ\u00eancia tritura as pedras em micropart\u00edculas, a partir da superf\u00edcie para baixo, eliminando as ondas de choque cin\u00e9ticas que causam retropuls\u00e3o, les\u00f5es nas mucosas e per\u00edodos de recupera\u00e7\u00e3o prolongados.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Aprovisionamento de componentes e normaliza\u00e7\u00e3o das mat\u00e9rias-primas<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Para os compradores de produtos m\u00e9dicos, grupos de compras hospitalares e distribuidores B2B internacionais, a avalia\u00e7\u00e3o da qualidade da fibra requer uma compreens\u00e3o clara das normas de fabrico aplic\u00e1veis \u00e0s fibras \u00f3ticas no setor m\u00e9dico. Uma vez que a litotripsia de alta frequ\u00eancia exerce uma tens\u00e3o consider\u00e1vel sobre os guias de onda de vidro finos, 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 da fibra \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, como a linha de t\u00falio de 1940 nm, s\u00e3o necess\u00e1rias formula\u00e7\u00f5es de s\u00edlica com baixo teor de OH. Ao contr\u00e1rio do vidro com elevado teor de OH, que absorve energia do infravermelho m\u00e9dio e sobreaquece rapidamente, uma matriz de s\u00edlica com baixo teor de OH garante uma excelente efici\u00eancia de transmiss\u00e3o com absor\u00e7\u00e3o interna de luz m\u00ednima, mantendo o cabo de fibra frio e est\u00e1vel durante procedimentos prolongados de litotripsia.<\/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 alta resist\u00eancia ou Tefzel proporciona uma elevada resist\u00eancia \u00e0 tra\u00e7\u00e3o e prote\u00e7\u00e3o contra ondas de choque ac\u00fasticas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Durante a ativa\u00e7\u00e3o do laser, a r\u00e1pida vaporiza\u00e7\u00e3o dos fluidos circundantes gera micro-ondas de choque na ponta da fibra. Uma fibra de alta qualidade de 365 \u00b5m com um revestimento avan\u00e7ado de poliimida absorve estes choques de forma eficaz, impedindo a microfratura do n\u00facleo de vidro e eliminando o risco de degrada\u00e7\u00e3o da ponta da fibra ou de fuga \u00f3tica no interior do trato urin\u00e1rio do paciente.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quadro de Log\u00edstica de Abastecimento e Integra\u00e7\u00e3o Operacional<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Por que raz\u00e3o os gestores de compras optam por uma fibra de 365 \u00b5m em vez das op\u00e7\u00f5es tradicionais de 272 \u00b5m ou 550 \u00b5m para sistemas avan\u00e7ados de litotripsia com t\u00falio?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Os gestores de aquisi\u00e7\u00f5es d\u00e3o prioridade ao n\u00facleo de fibra de 365 \u00b5m, uma vez que este proporciona um equil\u00edbrio operacional ideal entre a capacidade de transmiss\u00e3o de energia e a flexibilidade de alcance. Embora as fibras ultrafinas de 272 \u00b5m ofere\u00e7am uma excelente flexibilidade, enfrentam limita\u00e7\u00f5es na transmiss\u00e3o de pot\u00eancia em sa\u00eddas de alta frequ\u00eancia, o que pode conduzir a falhas nos conectores.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Por outro lado, as fibras grossas de 550 \u00b5m restringem o fluxo do fluido de irriga\u00e7\u00e3o e aumentam o atrito mec\u00e2nico no interior do canal de trabalho do endosc\u00f3pio, acelerando o desgaste do equipamento. A aquisi\u00e7\u00e3o de fibras padr\u00e3o de 365 \u00b5m permite \u00e0s redes hospitalares otimizar a efici\u00eancia da irriga\u00e7\u00e3o, proteger os endosc\u00f3pios dispendiosos contra danos e manter um elevado fornecimento de pot\u00eancia em diversas aplica\u00e7\u00f5es cl\u00ednicas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">De que forma \u00e9 que o espectro do laser de t\u00falio de 1940 nm minimiza a press\u00e3o intrarrenal durante procedimentos retr\u00f3grados prolongados?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">O laser de t\u00falio de 1940 nm reduz a press\u00e3o intrarrenal ao funcionar com baixas energias de pulso que transformam os c\u00e1lculos em micropart\u00edculas, eliminando a necessidade de grandes fragmentos mec\u00e2nicos ou cestos de extra\u00e7\u00e3o secund\u00e1rios. A fragmenta\u00e7\u00e3o tradicional cria peda\u00e7os grandes que obstruem o canal ureteral, exigindo irriga\u00e7\u00e3o com fluido a alta press\u00e3o para manter uma vis\u00e3o desobstru\u00edda.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O efeito de remo\u00e7\u00e3o cont\u00ednua de p\u00f3 produzido pelo comprimento de onda do t\u00falio mant\u00e9m o espa\u00e7o de trabalho limpo, permitindo que o p\u00f3 de pedra seja eliminado naturalmente com baixas press\u00f5es de irriga\u00e7\u00e3o. Esta redu\u00e7\u00e3o da press\u00e3o do fluido evita o refluxo pielovenoso, ajudando as equipas cir\u00fargicas a diminuir o risco de febre p\u00f3s-operat\u00f3ria e s\u00e9psis.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Que especifica\u00e7\u00f5es t\u00e9cnicas devem as equipas de garantia de qualidade verificar para assegurar que as fibras de 365um de outros fabricantes s\u00e3o compat\u00edveis com as consolas de laser cir\u00fargico padr\u00e3o?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Para garantir que os conjuntos de fibra de 365 \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 crit\u00e9rios principais:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Concentricidade do conector:<\/strong> O conector SMA-905 deve manter o n\u00facleo de s\u00edlica de 365 \u00b5m perfeitamente centrado no seu inv\u00f3lucro, garantindo que o feixe de laser entre no guia de ondas sem obstru\u00e7\u00f5es, sem tocar na estrutura met\u00e1lica circundante.<\/li>\n\n\n\n<li><strong>Correspond\u00eancia da abertura num\u00e9rica:<\/strong> A abertura num\u00e9rica da fibra deve corresponder com precis\u00e3o \u00e0 \u00f3tica de emiss\u00e3o da consola, para garantir que o feixe permanece confinado no n\u00facleo e n\u00e3o se espalha para o revestimento, o que pode provocar a fus\u00e3o da caixa do conector.<\/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>Utilizing a high-frequency thulium laser via a flexible 365um silica core provides exceptional dusting efficiency for upper urinary tract calculi, eliminating stone retropulsion into renal calyces while minimizing working channel friction across the optical fiber in medical field supply chains. Overcoming Stone Migration and Retropulsion in Caliceal Calculus Management Endourologists performing retrograde intrarenal surgery (RIRS) [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"themepark_post_bcolor":"#f5f5f5","themepark_post_width":"1022px","themepark_post_img":"","themepark_post_img_po":"left","themepark_post_img_re":false,"themepark_post_img_cover":false,"themepark_post_img_fixed":false,"themepark_post_hide_title":false,"themepark_post_main_b":"","themepark_post_main_p":100,"themepark_paddingblock":false,"footnotes":""},"categories":[19],"tags":[827,822],"class_list":["post-14874","post","type-post","status-publish","format-standard","hentry","category-industry-news","tag-surgical-laser","tag-thulium-laser"],"metadata":{"_edit_lock":["1781146339:1"],"_edit_last":["1"],"_aioseo_title":["Thulium Lithotripsy Laser Methods for Renal 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