for directional atherectomy
directional atherectomy catheter is advanced over a steerable
guide-wire. The housing has a 10 mm long window and a supporting
balloon on the opposite side. The proximal end has a balloon inflation
port, a guide wire port, a lever for movement of the cutter, and
an attachment for a motor, spins at 200 rpm.
After correct placement of the window over the lesion and balloon
inflation and a cut is performed by slowly advancing the spinning
cutter to the distal end of the housing device, thereby packing
the shavings into the nose cone of the device.
The balloon is deflated, the window reoriented, and the sequence
repeated. Complications include dissection of the coronary artery,
thrombus formation, and spasm, which may lead to acute infarction
of the heart muscle.
includes a standard over-the-wire steerable catheter system:
Dilatation catheter through which,
a steerable guide-wire is placed,
a guiding catheter to the coronary artery opening,
a balloon pressure device
manifolds for selection of constant pressure measurement or for
injection of contrast medium or heparinized saline