Patent ID: 8475468
Filing Date: 2013-07-02
Classification: A61B

Abstract:
1. An apparatus for delivering fluid to a desired location within a patient's body, comprising: an elongated outer tubular body having proximal and distal ends, the outer tubular body having a lumen extending from the proximal end to the distal end with an inner surface provided with inwardly directed projections spaced from one another around the circumference of the lumen and defining recesses between them; an elongated inner tubular member coaxially nested within the lumen of the outer tubular body to longitudinally move and rotate therein, wherein the elongated inner tubular member coaxially nested within the lumen of the elongated outer tubular body extends in a proximal direction beyond the proximal end of the elongated outer tubular body and extends in a distal direction beyond the distal end of the elongated outer tubular body, the inner tubular member having a lumen to receive a fluid delivery catheter and an outer surface provided with outwardly directed projections spaced from one another around the circumference of the inner tubular member and defining recesses between them; a locking mechanism comprising the inwardly directed projections of the outer tubular body and the outwardly directed projections of the inner tubular member, wherein in a first rotational position of the inner tubular member relative to the outer tubular body, the inwardly and outwardly directed projections and the defined recesses permit the inner tubular member to longitudinally move within the lumen of the outer tubular body and, in a second rotational position of the inner tubular member relative to the outer tubular body, the inwardly and outwardly directed projections are caused to engage one another in an interlocking relationship to prevent longitudinal movement of the inner tubular member within the lumen of the outer tubular body; a first frustoconical flange carried at a distal end of the elongated inner tubular member; and a second frustoconical flange carried at the distal end of the elongated outer tubular body, said second flange being oppositely directed from said first flange; and a fluid delivery catheter slidably located within the lumen of the inner tubular member, having proximal and distal ends and provided with laterally directed fluid delivery ports adjacent its distal end, the distal end of the fluid delivery catheter being locatable within the inner tubular member.