Patent ID: 8177752

Claim:
A medical tube set from which, after insertion of said tube set into a patient, a stylet may be retracted, comprising: a tube for insertion into a patient, and a stylet disposed within said tube, said stylet comprising: a core unit; an apical tip unit attached to a distal end of said core unit and arranged to engage with a distal end of said tube for insertion of said tube and stylet into a patient; and an expansion member disposed within said tube which is movable along the core unit to a posterior part of the apical tip unit in the core unit, and such that said expansion member is deployable to expand said distal end of said tube so as to allow retraction of said stylet from said tube; wherein said distal end of said tube is tapered; and wherein the external diameter of said expansion member is equal to, or larger than, the external diameter of said apical tip unit, and wherein said apical tip unit overlaps an edge of said distal end of said tube for insertion of said tube and said stylet into a patient.