A method of forming a catheter for inserciónUn method for forming a catheter for insertion into a patient, comprising: extruding a material in a patient, comprising: extruding a flexible biocompatible material into a tube (10), flexible, biocompatible a tube (10), the tube having an inner wall, an outer wall, UNAPEL tube an inner wall, an outer wall, proximal unaporción, a distal portion, a proximal face distortion, a distal portion, a distal face on the distal portion remote the proxial portion in the distal portion remote from the proximal portion, and a shaft, wherein a lumen (15) is poorly defined, and a shaft, wherein a lumen (15) is defined by the inner wall and depor extends coaxially the inner wall and extends coaxially within the tube porciónproximal through lntro porciónproximal tube through the distal portion to the distal face forming ela distal portion to the face distal, forming the lumen an opening in the distal face providing lumen an opening in the distal face providing a mandrel with a body portion and a porci a mandrel with a body portion and a tip portion (51), each having a seccióntraón tip (51), each having a seccióntransversal wherein the cross section of the pornsversal wherein the cross section of the tip portion (51) is less than the transveción tip (51) section is less the internadel tube (10) cross section inserting the mandrel in internadel rsal tube (10) inserting the mandrel into the lumen so that the tip portion of manel lumen so that the tip portion of the mandrel is disposed in the distal portion cdril deltubo is arranged in the distal portion I deltubo near the distal side of the tube porcierca deform the distal face of the tube deforming the distal portion of the tube so that the distal ng outer wall of the tube so that the outer wall tapers inward toward the opening defse and tapers inwardly towards the opening and deforming the lumen at the distal portion to conformarormar the lumen in the distal portion to form the tip portion
