An ultrasonic surgical device (10) for coagulation of an animal tissue that has a handle (11) for manipulation by a surgeon, an ultrasonic transducer (12) to generate ultrasonic vibration, and an ultrasonic application (13) connected to the transducer ultrasonic (12) and extending from the handle (11) to deliver ultrasonic vibrations to the animal tissue, wherein said apparatus additionally comprises: A distal portion on the ultrasonic applicator (13) having a generally round cross section with a diameter between approximately 2 and 6 millimeters to provide a wide surface for coagulation and to prevent a cut of animal tissue； An elongated support member (14) releasably connected to the surgical handle (11) and extending to the distal position of the ultrasonic applicator (13)； and A movable jaw (15) with a jaw surface (16) connected to the elongated support member (14) adjacent to the distal portion of the ultrasonic applicator (13) for movement towards said distal portion to a position close to a predefined space (22) between about 0.075 to about 1.9 millimeters, from said distal portion, where the mobile jaw (15) is configured to grip and maintain animal tissue during coagulation while allowing animal tissue to flow and coagulate.Un aparato quirúrgico ultrasónico (10) para la coagulación de un tejido animal que tiene un asa (11) para manipulación por parte de un cirujano, un transductor ultrasónico (12) para generar vibración ultrasónica, y una aplicación ultrasónica (13) conectada al transductor ultrasónico (12) y extendiéndose desde el asa (11) para administrar vibraciones ultrasónicas al tejido animal, donde dicho aparato comprende adicionalmente: Una porción distal sobre el aplicador ultrasónico (13) que tiene una sección transversal en general redonda con un diámetro entre aproximadamente 2 y 6 milímetros para proveer una superficie ancha para coagulación y para evitar un corte del tejido animal； Un miembro de soporte alargado (14) conectado de forma liberabl
