Browsing by Author "Saito, Shigeru"
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Item Effect of lateral body position on transesophageal echocardiography images and the association with patient characteristics: A prospective observational study.(2015-07) Mita, Norikatsu; Kuroda, Masataka; Saito, Shigeru; Miyoshi, SohtaroBackground: Changes in heart position are occasionally observed on the transesophageal echocardiography (TEE) image screen after changing the body position from supine to lateral, although the magnitude of change in cardiac position varies individually. We hypothesized that this variation is associated with certain patient characteristics and evaluated how lateral positioning affects visualization of the heart on TEE and whether the magnitude of change in the heart position correlates with patient characteristics. Methods: Fifty‑three lung resection patients were enrolled. Two angle and two length parameters (ΔθTV, ΔθAP, ΔLTV, and ΔLAP) were defined to describe location change of the lateral tricuspid annulus and right ventricular apex on the TEE image between supine and lateral position. The correlation coefficients were calculated between these four parameters and patient characteristics, including age, body mass index (BMI), epicardial fat thickness, and pulmonary function variables. Results: The ΔθTV correlated positively and inversely with BMI in both right and left lateral patients (right: r = 0.6365, P = 0.0034; left: r = −0.6616, P < 0.0001, respectively). In left lateral patients, the ΔθTV correlated inversely with epicardial fat thickness (r = −0.4879, P = 0.0182), and the ΔLAP correlated positively with the forced vital capacity percent predicted (r = 0.5736, P = 0.0082). Conclusions: Lateral body positioning affects cardiac visualization on TEE, and the BMI, epicardial fat thickness, and pulmonary function moderate this effect.Item Immune surveillance during pregnancy.(2010-10) Saito, Shigeru; Shima, Tomoko; Nakashima, Akitoshi; Lin, YiItem Use of slender catheters for transradial angiography and interventions.(2008-01-11) Masutani, Motomaru; Yoshimachi, Fuminobu; Matsukage, Takashi; Ikari, Yuji; Saito, ShigeruCurrently the 0.014-inch guidewire is commonly used for coronary intervention and all devices are 0.014 inch-compatible. The size of common guiding catheters is 6-F or 7-F. However, PCI requires oral administration of antiplatelet agents, and punctured-site complications such as hemorrhage and hematoma occur more frequently with use of a 6-F or 7-F guiding catheter compared to a 5-F guiding catheter. Moreover, 6-F or larger guiding catheters may cause radial arterial occlusion, although the transradial approach causes less punctured-site complications compared to the transfemoral approach. Recently, 0.010-inch guidewires applicable for the Kissing Balloon Technique (KBT) using a 5-F guiding catheter and 0.010-inch guidewire-compatible balloons have been developed in Japan, and a 3-F angiography catheter has also been developed. We refer to these devices as the "Slender System", and we have used this system for active treatment of bifurcation lesions and chronic total occlusion (CTO). In this report, we describe angiography using a 3-F catheter, the KBT using a 5-F guiding catheter and 0.010-inch guidewires, and treatment of CTO using a 5-F catheter and 0.010-inch guidewires. For CTO treated using the Slender System at our facility, the transradial arterial approach was used in 96% of cases, treatment using the Slender System alone succeeded in 68%, and the overall success rate was 89%. Therefore, our results show that complex lesions may be treatable using the Slender System, and that not all complex lesions require a 6-F or larger guiding catheters, a femoral arterial approach, or bilateral guiding catheters.