El nuevo revestimiento del lumen de la vía de gas facilita el uso y la colocación del catéter, prácticamente eliminando la formación de codos durante su inserción.

I interpreted "insert" as something introduced in the lumen to increased its rigidity and prevent kinking, although it also could refer to the integration of a gas line in a multi-lumen catheter.

There are a number of options for translating lumen (luz, orificio, canal)as well as kinking (redoblamiento, plegamiento, acodamiento, etc.)