Importance

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Abstract

A percutaneous dilator system comprising: (i) a first dilator tube having a tapered leading end and inwardly directed shoulder means spaced from the trailing end defining a gripping section between the shoulder and the trailing end; (ii) a bore through the tube dimensioned to receive a guide wire; and (iii) a second dilator tube having a bore corresponding to the outside diameter of the first tube, a tapered leading end, and an inwardly directed flange at the trailing end dimensioned to note with the shoulder means to limit relative axial mating movement of the first and second tubes while exposing the gripping section; whereby a puncture through tissue containing a guide wire of predetermined guage may be enlarged without substantial tissue damage by placing the first tube over the guide wire through the puncture, then sliding the second dilator tube over the wire and first dilator tube until its flange means engages the shoulder means to enlarge the puncture further, the dilator tubes being subsequently removable as a unit by pulling on the gripping section.

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First Claim