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Biomedical subjects

R Aoki

Publications and source records attributed to R Aoki.

At least 73 records · Page 4Linked to original sources

[Evaluation of left atrial function by 99mTc gated blood pool scan].

99mTc gated blood pool scans were studied to assess the left atrial function. Relationship between filling time and rapid emptying time was y = 0.695 x + 109 (r = 0.761, p less than 0.05, n = 14) in LAO and LPO projections. On the other hand, relationship between slow filling and rapid emptying time was good closely (y = 0.846 x + 16.9 (p less than 0.01, r = 0.975, n = 8] in standard and retrograde acquisition. To assess the left atrial function by standard acquisition in LAO projection should be available for clinical use.

Aged↗

[Evaluation of cardiovascular responses to handgrip tests in patients with ischemic heart disease by radionuclide method].

Left ventricular responses to handgrip exercise test in patients with ischemic heart disease were assessed by RI methods. We subdivided into three groups (A: delta EF more than 5% increased, B: delta EF -5%-+5% no change, C: delta EF less than 5% reduced), left ventricular contractility (LVEF/LVET) and Tl defect score changed significantly in global EF reduced group, moreover the usefulness of handgrip test was assured. This instrument is low cost, safety, small size, and available for wide ranged ages.

Blood Pressure↗

Sexing of human sperm by discontinuous Percoll density gradient and its clinical application.

A discontinuous Percoll density gradient was employed for the selective isolation of human X-bearing sperm. The fraction rich in X-bearing sperm that sedimented through eight steps of a Percoll density gradient was inseminated into healthy volunteers. Six couples achieved pregnancy and each delivered a female baby without abnormality. For further separation, a Percoll density gradient consisting of 12 steps gave a 94% purification of X-bearing sperm (contamination with Y-bearing sperm: 6.4 +/- 1.8%) with a mean recovery of 23.3 +/- 6.4% (n = 6).

Centrifugation, Density Gradient↗

[Effect of hemodialysis on left and right ventricular function--evaluation using electrocardiogram gated radionuclide ventriculography].

Eighteen outpatients with chronic renal failure undergoing hemodialysis (HD) were studied. Immediately before and after HD, the left and right ventricular function measured by electrocardiogram gated radionuclide ventriculography (RNV). By HD, body weight changed 58.6 +/- 7.50 kg to 57.2 +/- 6.80 kg and BUN level changed 67.9 +/- 29.00 mg/dl to 37.1 +/- 18.96 mg/dl and creatinine level changed 11.3 +/- 3.90 mg/dl to 6.8 +/- 2.48 mg/dl. Before HD, cardiac output was 8.08 +/- 1.50 l/min and cardiac index was 5.00 +/- 0.87 l/(min m2). Left ventricular function improved (LVEF changed 60.4 +/- 6.85% to 64.2 +/- 8.7%, LVEF/LVET changed 0.237 +/- 0.048%/ms to 0.254 +/- 0.021%/ms) between before and after HD, but there was not significant difference. Right ventricular function improved (RVEF changed 41.2 +/- 8.00% to 50.0 +/- 11.96, RVEF/RVET changed 0.167 +/- 0.028%/ms to 0.209 +/- 0.059%/ms) between before and after HD, and there was significant difference (p less than 0.05).

Adult↗

[Evaluation of the visualized left atrium by 201Tl myocardial scintigraphy].

201Tl myocardial scintigraphy was evaluated in patients with 18 mitral stenosis cases. Left atrium was to be seen in ANT (16.7%), LAO (16.7%), MLAO (16.7%) and L-LAT (11.1%), respectively. Furthermore, 201Tl uptake ratio of left atrium, right ventricle, pulmonary area tended significantly to increase in visible group compared with invisible group. PCW pressure was correlated with left atrial Tl uptake (r = 0.51, p less than 0.005), and it indicated some correlation between left atrial pressure and 201Tl uptake.

Adult↗

Transcervical resection of submucous myoma.

Thirteen women with chief complaints of menorrhagia and metrorrhagia underwent transcervical resection (TCR) of pedunculated submucous myoma using either an operating hysteroscope or urologic resectoscope. Eight women received TCR with a urologic resectoscope without further operation. Subsequent vaginal hysterectomy was performed on one woman after TCR of a large prolapsed submucous fibroid with a urologic resectoscope because of adenomyosis. Three women underwent TCR of the same type of large prolapsed submucous myoma with an operating hysteroscope. Later, due to other pathologic lesions of the uterus, subsequent vaginal hysterectomies were done on two women and a subsequent abdominal hysterectomy on another woman. Without TCR of these large prolapsed submucous myoma, subsequent vaginal hysterectomies were not possible. Only one woman underwent TCR of submucous myoma with an operating hysteroscope without further operation. All patients showed improvement in such clinical symptoms as menorrhagia, metrorrhagia, and anemia. Before TCR, we make it a rule to use a new diagnostic hysteroscope (4mm external sheath) to reevaluate the position and size of the fibroid. The fluid media used were 10% dextrose for diagnostic hysteroscopy, 5% dextrose for therapeutic hysteroscopy and 10% urigal for urologic resectoscopy. Three months after the operation, second look hysteroscopy is arranged. All patients except one have been followed up at our outpatient department.

Adult↗

[Lymphokines].

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Animals↗