An endoluminal access medical device (1), designed for endoluminal administration to an extravascular target site (5) at a vasculature site (4), such as a microvasculature site, of a vasculature of the human or animal body, in wherein said device (1) comprises a hollow body (112) that is disposed around a continuous channel (113) ending in an opening at a distal end (100) of said device； wherein said hollow body (112) comprises a detachable elongated distal portion (102) that is designed to extend through a tissue wall (200) of said vasculature at said vasculature site (4) in said body and conceived to provide communication with said extravascular target site (5) through said channel (113) and designed to at least partially juxtapose with said tissue wall (200), and a proximal portion (110), which joins proximally with said portion distal (102) in a proximal connection section (101)； and a hollow separation section (115) that is arranged in said hollow body (112) for the controlled separation of said distal portion (102) of said proximal portion (110) of said hollow body (112) in said proximal connection section (101).Un dispositivo médico de acceso endoluminal (1), concebido para administración endoluminal a un sitio diana extravascular (5) en un sitio de la vasculatura (4), tal como un sitio de la microvasculatura, de una vasculatura del cuerpo humano o animal, en el que dicho dispositivo (1) comprende un cuerpo hueco (112) que está dispuesto alrededor de un canal continuo (113) que termina en una abertura en un extremo distal (100) de dicho dispositivo； en el que dicho cuerpo hueco (112) comprende una porción distal alargada desprendible (102) que está concebida para extenderse a través de una pared del tejido (200) de dicha vasculatura en dicho sitio de la vasculatura (4) en dicho cuerpo y concebida para proporcionar comunicación con dicho sitio diana extravascular (5) a través de dicho canal (113) y concebida para yuxtaponerse al menos parcialmente con dicha pa
