We investigated influence of Doppler angle on peak systolic velocity (PSV). In our hospital, 109 carotid arteries were examined using carotid duplex. The PSVs obtained with a 45˚ and a 60˚ insonation angles at the distal common carotid artery and proximal internal carotid artery were statistically analyzed. The PSV measurements obtained with the two fixed insonation angles were statistically significantly different (p < 0.0001). Doppler insonation angle has a significant influence on PSV. Carotid duplex examination should be performed with a fixed angle in order to obtain reproducible results.
Background: The aim of this study was to investigate the influence of dialysis on midterm results after treatment of aortic diseases. Methods: Between May 2007 and April 2013, 20 consecutive patients underwent endovascular aortic repair (n=14) and graft replacement (n=6). Of them, 7 patients required emergency procedures due to rupture (n=5) or acute type A aortic dissection (n=2). Results: There were four early deaths. Survival rates at 1 and 3 years were 64% ± 11% and 43% ± 12%, respectively. One patient died of adverse aorta-related events. Freedom from late aortic events at 1, 2, and 3 years were 46% ± 13%, 30% ±14%, and 20% ± 12%, respectively. Late aortic events (n=9) included six new diseases and two endoleaks. Conclusions: Late aortic events occurred in nearly half of dialysis patients undergoing aortic repair. Thus close follow-up surveillance is needed.
The result of endovascular treatment for the superficial femoral artery has been getting better, not only acute phase but also chronic phase, by the appearance of new devices. However, even these new devices could not resolve every problem, so it became important to seek appropriate devices for each patient. I investigated the past results and problematic issues of several new devices that will either be introduced to the Japanese market in future or are beginning clinical trials.
The Japanese health insurance started to cover self-injection of heparin calcium at home at April 2012. For the patients of deep venous thrombosis in pregnancy, attending a hospital once every 1–2 weeks has been made possible instead of attending a hospital every day or long-term hospitalization. We build a system to guide the patients in self-injection of heparin calcium at home by cooperation of the doctors, nurses, and pharmacists. We report this system along with two cases.