Suction Catheter
Michishita and colleagues used an 8-Fr
suction catheter with distal holes (Figure 12 ) and accessed CS
with the usage of an inner catheter as a guidewire control as well as
for its stiffness. Another balloon using Swan-Gantz catheter and a
Fogarty catheter was implemented to prevent blood leakage from CS to the
right atrium and azygous vein, respectively. They transferred the
extracted blood to an absorbing column with the usage of an
extracorporeal system. Afterward, the blood was returned back to the
swine through the left femoral vein. The total procedure time was 90
minutes and serial blood samples were taken at different pre-and
post-column time frames (0, 10, 20, 30, 40, 50, 60, 65, 75, and 90
minutes). Iodine contrast concentration was measured through an
inductively coupled plasma optical emission spectrophotometer (CMC
Development Department, Nihon Schering) with the use of ultraviolet
methods. None of the study samples experienced alterations in vital
signs including body temperature and blood pressure as well as an
electrocardiogram. They also suggested this system can be inserted
through femoral access into the CS by fluoroscopic guidance with no
usage of contrast administration. Also, the specific design of distal
holes on the catheter enables it to efficiently remove contrast from
left or right coronary arteries draining into or near the CS ostium.
They also claimed this system is quite time-saving because it does not
need any pre- or post-procedure
interventions (87).