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Biomedical subjects

K Kusunoki

Publications and source records attributed to K Kusunoki.

At least 37 records · Page 2Linked to original sources
PubMed1995

Primary spinal chondrosarcoma localized in the cervical spinal canal and intervertebral foramen--case report.

A 48-year-old male presented with a very rare case of spinal chondrosarcoma localized in the cervical spinal canal and intervertebral foramen, but without marked destruction of the vertebral column. Spinal chondrosarcoma is characterized by radiological evidence of destruction of the surrounding bone structure and mottled calcification. Magnetic resonance imaging was useful in the diagnosis and determination of the extent of this spinal chondrosarcoma. However, preoperative differential diagnosis of the tumor was not possible based on neuroimaging evidence.

Cervical Vertebrae↗
PubMed1993

[Arterial blood ketone body ratio and systemic hemodynamics in patients with acute hepatic blood flow occlusion].

This study was undertaken in order to clarify the influence of acute hepatic blood flow occlusion on arterial blood ketone body ratio (AKBR) and systemic hemodynamics. Ten patients for hepatectomy were divided into two groups. Group I was composed of five patients who had clamping of total hepatic blood flow (Pringle's method), and Group II was composed also of five patients who had clamping of the right hepatic artery and portal vein during operation. Ten minutes after clamping blood flow, AKBR decreased significantly in both groups, and a marked reduction in AKBR was observed in group I. During occlusion, cardiac output was reduced significantly, and immediately after declamping, mean arterial blood pressure and systemic vascular resistance index (SVRI) decreased significantly. These changes in hemodynamics in group I were larger than those of the other group. A larger reduction in AKBR was observed during occlusion, and the greater change in SVRI appeared after declamping blood flow. These findings suggest that in the cases with hepatic blood flow occlusion, especially total occlusion, a special attention should be paid to mitochondrial liver dysfunction and hemodynamic changes associated with acute hepatic blood occlusion.

Aged↗
PubMed1989

[Relationship between clinical findings and subgingival microbial flora in periodontitis (2)].

The purpose of this study was to examine the relationship between clinical findings and subgingival relationship between clinical findings and subgingival microbial flora in periodontitis at the first medical examination and after initial preparation. The results obtained were as follows: 1. Clinical findings with the exception of plaque index showed improvement after initial preparation in comparison with the first medical examination. 2. In phase contrast microscopy, both total bacteria and incidence of spirochetes and motile rods decreased after initial preparation in comparison with the first medical examination. 3. Clinical findings with the exception of plaque index were related to the total bacteria and proportional distribution of spirochetes and motile rods in periodontal pockets, observed in phase contrast microscopy. 4. Total bacteria and proportional distribution of black-pigmented Bacteroides in periodontal pockets decreased after initial preparation in comparison with the first medical examination.

Dental Prophylaxis↗
PubMed1988

Effects of hypoxia and reoxygenation on maximum rate of early left ventricular filling.

Left ventricular early filling during hypoxia and reoxygenation was examined in isolated working rat hearts that contracted 300 times/min when perfused with Krebs-Henseleit solution at 37 degrees C. Left ventricular short-axial diameter (LVD = D) was measured with a pair of ultrasonic crystals. The maximum lengthening velocity of LVD [(dD/dt)max] decreased with hypoxia and recovered after reoxygenation (from a control of 20.3 +/- 6.7 to 7.3 +/- 1.7 mm/s after 15 min of hypoxia and to 16.3 +/- 8.1 mm/s after 15 min of reoxygenation; n = 7). However, (dD/dt)max/delta D (where delta D is systolic shortening) showed no significant change with either hypoxia or reoxygenation (from a control of 21.0 +/- 2.9 l/s to 22.2 +/- 2.7 l/s after 15 min of hypoxia and to 22.5 +/- 3.7 l/s after 15 min of reoxygenation; n = 7). Therefore, we concluded that the changes of (dD/dt)max with hypoxia and reoxygenation were caused by the changed systolic shortening and that left ventricular myocardial recoil, expressed by (dD/dt)max/delta D, showed no change with either hypoxia or reoxygenation.

Animals↗
PubMed1988

[A study of ultrasonic scaler. The effect of the different frequencies of the ultrasonics in the experimental calculus removal and roughness of the metallic plate after scaling].

In an attempt to determine how the degree of the experimental calculus removal on the metallic plate and its roughness after scaling would be affected by ultrasonics under high or low frequency, quantitative measurement and morphological observation were made. The results obtained were as follows: 1. On the calculus removal, larger effect was obtained by high frequency unit than low frequency. 2. On the roughness of the metallic plate after scaling, larger defect was observed by high frequency unit than low frequency. 3. Scanning electron microscopically, strip like defects were observed under low frequency unit, while exfoliation of the metallic plate in addition to the strip like defects were observed under high frequency.

Dental Calculus↗
PubMed1987

[Colored spatial mapping electrocardiography for detecting myocardial infarction].

Colored spatial mapping electrocardiography (ECG) was developed for practical use from Frank lead vectorcardiography using a microcomputer system (CERX-CQ3001). Compared to body surface electrocardiography this new device facilitated easy recording and analysis for display on eight-colored spatial mapping electrocardiography at points equivalent to those on a terrestrial globe at intervals of 20 degrees longitude and 10 degrees latitude. In this study, the extent and direction of the Q waves were easily recognized with the aid of a colored display and mapping electrocardiography. To quantitatively evaluate infarct size, the total Q wave area (sigma Aq) was calculated from the mapping electrocardiograms of 12 patients with anteroseptal myocardial infarction, and compared with thallium defect scores obtained by single photon emission CT (SPECT) and the left ventricular ejection fraction (EF). Defect scores were calculated using short-axis images. Sigma Aq was correlated with defect scores and EF (r = 0.83, 0.45, respectively). This new type of colored spatial mapping electrocardiography proved useful for detecting myocardial infarction and for evaluating infarct size.

Color↗