System (200) comprising: a pneumatic surgical instrument (102)； a surgical console (100) that serves to provide compressed gas to the pneumatic surgical instrument； and a pneumatic transmission line (402, 404, 600, 702, 802, 902) that couples the pneumatic surgical instrument to the surgical console, in which the pneumatic transmission line has a proximal end coupled to a port (108) in the surgical console and a distal end coupled to a port in the pneumatic surgical instrument, the pneumatic transmission line having an internal orifice (416) configured to supply the compressed gas to the pneumatic surgical instrument, characterized in that the internal orifice has a cross section non-uniform along a length of the pneumatic transmission line, in which the inner hole narrows from the proximal end to the distal end, in which a first end (410) of the pneumatic transmission line in the surgical console it has a first external diameter (OD1) and a first internal diameter (ID1), in which a second end (420) of the pneumatic transmission line The pneumatic surgical instrument has a second external diameter (OD2) that is smaller than the first external diameter and a second internal diameter (ID2) that is smaller than the first internal diameter, and in which the pneumatic transmission line at the distal end it has a reduced size and mass so that the pneumatic transmission is more flexible in the pneumatic surgical instrument than in the surgical console.Sistema (200) que comprende: un instrumento quirúrgico neumático (102)； una consola quirúrgica (100) que sirve para proporcionar gas comprimido al instrumento quirúrgico neumático； y una línea de transmisión neumática (402, 404, 600, 702, 802, 902) que acopla el instrumento quirúrgico neumático a la consola quirúrgica, en el que la línea de transmisión neumática tiene un extremo proximal acoplado a un puerto (108) en la consola quirúrgica y un extremo distal acoplado a un puerto en el instrumento quirúrgico neumático, teniend
