A syringe (100) comprising: a plunger (102) comprising: a plunger tube (150) having proximal and distal ends; a central tube (152) coupled to the proximal end of the plunger tube (150) and extending within the plunger tube (150) towards the distal end, the central tube (152) having a central passage (162); and a balloon (154) disposed on the central tube (152) and hermetically fixed to at least one of the central tube (152) and the piston tube (150); and a cylinder (101) comprising: a cylindrical tube (110) having proximal and distal ends and an interior configured to accept a portion of the plunger (102); a tip (112) fixedly attached to the proximal end of the cylindrical tube (110); a post (114) fixedly attached to the tip (112) and extending within the cylindrical tube (110) towards the distal end, the tip (112) configured to partially extend into the central passageway (162) of the plunger (102) ; a gas passageway (116) extending from a proximal end of the tip (112) to the distal end of the post (114); and a liquid passageway (118) between an outer surface of the tip (112) and the interior of the cylindrical tube (110).Una jeringa (100) comprendiendo: un émbolo (102) comprendiendo: un tubo (150) de émbolo que tiene extremos proximal y distal; un tubo (152) central acoplado al extremo proximal del tubo (150) de émbolo y que se extiende dentro del tubo (150) de émbolo hacia el extremo distal, teniendo el tubo (152) central un pasaje (162) central; y un balón (154) dispuesto sobre el tubo (152) central y fijado herméticamente a al menos uno del tubo (152) central y el tubo (150) de émbolo; y un cilindro (101) comprendiendo: un tubo (110) cilíndrico que tiene extremos proximal y distal y un interior configurado para aceptar una porción del émbolo (102); una punta (112) acoplada de forma fija al extremo proximal del tubo (110) cilíndrico; un poste (114) unido fijamente a la punta (112) y que se extiende dentro del tubo (110) cilíndrico hacia el extremo distal, la pun