Adjustable length catheter assembly

摘要

A catheter assembly for cannulating a heart vessel includes a guide handle having proximal and distal ends, a lumen open at least at the distal end of the guide handle, and a stop member disposed within the lumen at a distal end of the guide handle. A catheter of the assembly has a proximal end disposed within the lumen of the guide handle and a preformed distal end. The catheter is longitudinally displaceable within the guide handle to adjust an exposed length of the distal end of the catheter. The stop member is engagable with the proximal end of the catheter to prevent the proximal end of the catheter from passing out of the guide handle. A locking mechanism within the guide handle to selectably prevents and permit axial rotation between the guide handle and catheter while permitting longitudinal displacement of the catheter within the guide handle.