PCI using a 4-Fr "child" guide catheter in a "mother" guide catheter: Kyushu KIWAMI® ST registry

With the development of PCI techniques, the indications for stents have been expanding as well. On the other hand, we often encounter the situations where deploying a stent/stents by the conventional method is technically challenging. We report a novel stent delivery system using a newly developed 4Fr. straight catheter with Mother-and-Child method.

We collected the data on coronary angioplasty in which we experienced the difficulty to deliver coronary stents and used 4Fr. KIWAMI ST01. The case number amounts to 32 cases over a six-month period from October 2009 through March 2010. The angioplasty was performed for lesions in the RCA in 9 patients (28%), lesions in the LAD in 15 patients (47%), lesions in the LCX in 5 patients (16%), lesions in the saphenous vein grafts in 2 patients (6%), and lesions in the internal thoracic artery (LITA) grafts in 1 patient (3%). And the reasons for the difficult stent delivery by the conventional methods were as follows: severe calcification in 12 patients (37%), intense tortuosity in 7 patients (22%), poor backup support for guide catheter in 8 patients (25%), and trapping of the stent proximal to the target lesion in 5 patients (16%). The dislodgment of stent did not happened in all cases.

KIWAMI® ST01 stent delivery system is feasible, safer, and effective in cases where stent delivery is difficult by the conventional method.