Time filter

Source Type

Sueda S.,Ehime Prefectural Niihama Hospital | Kohno H.,Tsukazaki Hospital
Journal of Cardiology | Year: 2016

Pharmacological spasm provocation tests are invasive methods and we always have the potential to encounter complications when performing these tests. In 1980, Buxton et al. reported three deaths when they performed intravenous ergonovine testing. However, we now employ the intracoronary ergonovine test instead of the intravenous injection of ergonovine from a safety procedure point of view. Past serious major complications of intravenous ergonovine tests, intracoronary ergonovine tests, and intracoronary acetylcholine tests were 0.31% (26/8419), 0.51% (11/2173), and 0.95% (148/15,527), respectively. Selective intracoronary testing had the serious major complications in 0.89% of patients including just one death (0.006%) and two acute myocardial infarctions (0.01%). Selective spasm provocation tests had no additional risks compared with performing diagnostic coronary angiography alone. In the Western countries, the pharmacological spasm provocation tests are not familiar in the clinic except for some specialized institutions. We need international clinical studies using the same protocol of spasm provocation tests to compare the frequency, clinical features, and prognosis of acetylcholine- or ergonovine-provoked coronary spasm between Western and Asian countries. And we hope that Western guidelines give spasm provocation testing a class I indication similar to Japanese Circulation Society guidelines because coronary artery spasm may have fewer racial differences and borders. © 2016 Japanese College of Cardiology. Source

Shimokawa N.,Tsukazaki Hospital | Takami T.,Osaka City University
Neurosurgical Review | Year: 2016

Cervical pedicle screw (CPS) may be the biomechanically best system for posterior cervical segmental fixation, but may carry a surgery-related risk. The purpose of this study was to evaluate the safety of CPS placement using computer navigation system for posterior cervical instrumented fixation and discuss its complication avoidance and management. Posterior cervical instrumented fixation using CPS was performed in a total of 128 patients during the period between 2007 and 2015. Intraoperative image guidance was achieved using a preoperative 3D CT-based or an intraoperative 3D CT-based navigation system. A total of 762 CPSs were placed in the spine level of C2 to Th3. The radiological accuracy of CPS placement was evaluated using postoperative CT. Accuracy of CPS placement using a preoperative 3D CT-based navigation system was 93.6 % (423 of 452 screws) in grade 0; the screw was completely contained in the pedicle, and accuracy of CPS placement using an intraoperative 3D CT-based navigation system was a little bit improved to 97.1 % (301 of 310 screws) in grade 0. CPS misplacement (more than half of screw) was 3.3 % (15 of 452 screws) using a preoperative 3D CT-based navigation system, and CPS misplacement (more than half of screw) was 0.6 % (2 of 310 screws) using an intraoperative 3D CT-based navigation system. In total, 38 screws (5.0 %) were found to perforate the cortex of pedicle, although any neural or vascular complications closely associated with CPS placement were not encountered. Twenty nine of 38 screws (76.3 %) were found to perforate laterally, and seven screws (18.4 %) were found to perforate medially. Image-guided CPS placement has been an important advancement to secure the safe surgery, although the use of CPS placement needs to be carefully determined based on the individual pathology. © 2016 The Author(s) Source

Kato Y.,Tsukazaki Hospital | Yamamoto Y.,Kochi University | Tabuchi H.,Tsukazaki Hospital | Fukushima A.,Kochi University
Japanese Journal of Ophthalmology | Year: 2013

Objective: To examine using the folds of the retinal pigment epithelium (RPE) to diagnose Vogt-Koyanagi-Harada (VKH) disease. Methods: Retrospective clinical review of 57 Japanese patients between July 2005 and April 2009. Optical coherence tomography (OCT), fundus photographs and fluorescein angiography (FA) were studied to investigate Kendall's coefficients of concordance in seven findings by four ophthalmologists. The sensitivity and specificity of each finding were examined to confirm its efficacy. Each result was defined as positive when more than three of the ophthalmologists judged that the finding existed. Results: The folds of the RPE on OCT were observed in 30/42 (71.4 %) eyes having VKH disease, but none in the other 72 eyes. Kendall's coefficient of concordance in the detection of the folds of the RPE was 0.90 and was the highest among all other findings. Sensitivity was higher in the detection of the RPE folds on OCT and in optic nerve staining on FA than other findings and the specificity was 100 % for the RPE folds and 26.7 % for the optic nerve staining. Conclusion: The detection of the folds of the RPE on OCT is a simple and effective method to help diagnose VKH disease at its acute stage which does not require pupil dilation. © 2012 Japanese Ophthalmological Society. Source

Ohsugi H.,Tsukazaki Hospital | Ikuno Y.,Osaka University | Oshima K.,Tsukazaki Hospital | Yamauchi T.,Tsukazaki Hospital | Tabuchi H.,Tsukazaki Hospital
American Journal of Ophthalmology | Year: 2014

Purpose To investigate the morphologic characteristics of macular complications of dome-shaped maculas using swept-source optical coherence tomography (OCT). Design Retrospective observational case series. Methods Axial length measurements and swept-source OCT were performed in 49 highly myopic eyes (in 5 male and 30 female subjects) with dome-shaped maculas. We classified the dome patterns and measured the central retinal thickness, central choroidal thickness, central scleral thickness, and the macular bulge height, and assessed the associations of these parameters with macular complications. Results The central scleral thickness was significantly negatively correlated with age and the axial length. We classified the eyes into 3 groups: 6 with choroidal neovascularization (CNV group), 8 with retinal pigment epithelial detachment (PED group; 5 with serous retinal detachment), and 35 with no complications (no complications group). Nine eyes had a round dome and 40 had horizontally oriented oval-shaped domes. There were no significant differences in the frequency of macular complications between these patterns. The CNV group was significantly older and had a longer axial length than the other groups. The PED group had significantly larger values for both the central scleral thickness and bulge height than the other groups. The central choroidal thickness was significantly thinner in the CNV group than in the no complications group. Conclusion A dome-shaped macula results from relative thickening of the macular sclera, and this may lead to PED. Thinning of the sclera owing to long-term changes and elongation of the axis may develop CNV and cause visual impairment. © 2014 by Elsevier Inc. All rights reserved. Source

Nakao Y.,Tsukazaki Hospital | Suda K.,Spinal Cord Injury Center Hokkaido Chuo Rosai Hospital | Shimokawa N.,Tsukazaki Hospital | Fu Y.,Tsukazaki Hospital
Spinal Cord | Year: 2012

Study design: Case control. Objective: To clarify the predictors of low blood pressure (BP) and hyponatremia after spinal cord injury (SCI) and to discuss their pathophysiology. Setting: A SCI center in Japan. Methods: Age, gender, initial ASIA impairment scale (AIS) score, BP, blood electrolytes (sodium, K and Cl) and biochemical markers were evaluated at 1 month after injury. Risk factors of low BP and hyponatremia were analyzed using uni- and multivariate logistic regression models. Results: This study comprised of 172 SCI patients. Initial AIS score (Odds ratio (OR): 1.24, 95% confidence intervals (CI) 1.13-1.49, P-value <0.01) and hyponatremia (OR: 3.71, 95%CI 1.27-6.96, P<0.01) were the most important risk factors of low BP. As a second step, risk factors of hyponatremia were initial AIS score (OR: 1.36, 95%CI 1.08-2.78, P<0.01) and age (OR: 1.55, 95%CI 1.17-2.93, P<0.01). Conclusions: In acute and subacute period, the more severe SCI and lower AIS score patients have the more frequently low BP and/or hyponatremia do appear. © 2012 International Spinal Cord Society All rights reserved. Source

Discover hidden collaborations