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Biomedical subjects

M Kudo

Publications and source records attributed to M Kudo.

At least 487 records · Page 27Linked to original sources
PubMed1981

[Tricuspid valve motion and tricuspid valve ring size in normals and patients with atrial septal defect (author's transl)].

To investigate the normal configuration of the tricuspid valve and the normal size of the tricuspid valve ring, 17 normals, 20 patients with atrial septal defect, 4 patients with tricuspid valve prolapse, and 41 patients with various diseased conditions were studied by cross-sectional echocardiography. The tricuspid valve ring diameter in atrial septal defect was judged to be increased in comparison with that of normals. All the patients with tricuspid valve prolapse exhibited an excessive systolic ballooning of the leaflets toward the right atrium. However, a systolic ballooning of the leaflets alone was frequently observed in normals and many other conditions. Therefore, we conclude that cross-sectional echocardiography has some clinical limitations in the differential diagnosis between tricuspid valve prolapse and normals.

Adult↗
PubMed1980

Ascending projections of the inferior colliculus in the cat: an autoradiographic study.

The ascending projections of the inferior colliculus (IC) in the cat were traced by the autoradiographic method, with special reference in the differenial projections of each subnucleus of IC. The laminated ventrolateral part of the central nucleus of IC (CNv) projects to the ventral and medial divisions of the ipsilateral medial geniculate body (MGB). The projections to the ventral division are topographically organized in the mediolateral direction, the terminals being arranged in the form of lamina, while those to the medial division are diffuse. The unlaminated dorsomedial part of the central nucleus of IC (CNd) sends fibers to every division of the ipsilateral MGB, particularly to the dorsal division and the ventromedial portion of the ventral division. It is noteworthy that the external nucleus of IC (EN) projects to the superior colliculus, part of the pretectum, and the anterior extremity of MGB ipsilaterally, in addition to the ventral and medial divisions of MGB. The posterior cap of IC, regarded as the pericentral nucleus of IC (PC), projects ipsilaterally to the ventral part of the caudal tip of MGB and the posterior part of the suprapeduncular nucleus. In addition of these projections, the parabrachial region and interstitial nucleus of the brachium of IC (BIC) are identified as common targets of projections of each nucleus of IC on the ipsilateral side. Contralaterally, every subnucleus of IC except for PC projects via the commissure of IC to areas corresponding to the targets of the ipsilateral projections, such as the ventral and medial divisions of MGB and the parabrachial region and the interstitial nucleus of BIC, although these contraleral projections are in general much sparser than those ipsilateral. Intrinsic and commissural connections within IC are also revealed in this study, providing characteristic configurations of each subnucleus of IC. It is concluded that the ascending projections of IC in the cat are highly differentially organized according to its subnucleus.

Animals↗
PubMed1980

Effect of anaesthesia and surgery on endocrine function in elderly patients.

The effect of halothane-nitrous oxide anaesthesia and abdominal surgery on endocrine function was investigated in 18 elderly patients whose ages ranged from 65 to 77 (mean 69 years). Cortisol levels in plasma increased significantly during anaesthesia and surgery, and the increases were slightly higher than those in young adults. Plasma aldosterone increased and insulin levels did not change during the procedures, and these levels were lower than in younger adults. The endocrine responses in elderly patients were similar in magnitude to those in young adults. Therefore it appears that no special hormonal treatment is necessary for elderly patients undergoing routine surgical procedures.

Age Factors↗
PubMed1980

Dose-dependency and reproducibility of the prolactin response to metoclopramide.

Six normal volunteers were tested to ascertain the dose-dependency and reproducibility of the prolactin response to metoclopramide. Furthermore, pretreatments with 1-dopa or cyproheptadine were performed. The same subjects also received intravenously 500 microgram TRH. The oral administration of 5 mg metoclopramide produced a significant rise in prolactin at 60 min and a maximal elevation at 90 min. The intravenous administration of 5 mg metoclopramide produced a significant increment at 15 min and a maximal prolactin level at 30 min. Peak prolactin levels following i.v. administration of the drug were greater than those after oral administration. Intravenous administration of 1 mg of metoclopramide produced a potential increment in plasma prolactin. Maximal prolactin response to 1 mg i.v. metoclopramide was similar to that found with 500 microgram i.v. TRH. Reproducibilities of prolactin response were good in all doses and modes of administration of metoclopramide. Pretreatment with 1-dopa inhibited the metoclopramide-induced prolactin response, but pretreatment with cyproheptadine did not influence the prolactin response to metoclopramide. Metoclopramide is a good and reproducible stimulator of prolactin secretion.

Adult↗
PubMed1980

Hypolipidemic effects of S-methylmethionine (vitamin U) using various experimental procedures.

The hypolipidemic and anti-atheromatous effect of S-methylmethionine sulfonium chloride (Vitamin U, MMSC) were investigated using various experimental procedures. In the results, orally administered MMSC markedly normalized dietary-induced hyperlipidemia in rats and rabbits, demonstrating the lowering effects on plasma total cholesterol, beta-lipoprotein and phospholipids, and no appreciable effect on plasma triglycerides. In normolipidemic and a surfactant-induced hyperlipidemic rats, MMSC did not decrease plasma lipids level, nor MMSC-affected plasma lipoprotein lipase and liver catalase activities. In contrast, clofibrate showed little or no effect on plasma lipids level of dietary-induced hyperlipidemic rats, with exception of plasma triglycerides, whereas clofibrate lowered plasma lipids level in normolipidemic and surfactant-induced hyperlipidemic rats, and enhanced liver catalase activity. From the results, the lipids lowering effects of MMSC using various procedures were clearly differentiated from those of clofibrate. Additionally, the anti-atheromatous effect of MMSC was histopathologically demonstrated in dietary-induced ahteromatous rabbits. A unique hypolipidemic effect of MMSC is discussed from therapeutic viewpoint.

Animals↗
PubMed1980

[Iatrogenic intraspinal epidermoid cyst (author's transl)].

A case of an intraspinal cyst following a lumbar puncture is described. A 57 year-old man had a myelography at the level of L-2 revealing a disc herniation of L-4. About two years later he had another myelography for recurrent back pain, which disclosed an intradural extramedullary tumor at the level of L-2. Pathological diagnosis of the tumor was epidermoid cyst. From the topographical standpoint of the tumor, the previous lumbar puncture was thought to be the most likely cause of the epidermoid cyst. This is the third case report, to the best of our knowledge, which had a normal myelogram prior to the development of epidermoid cyst in the spinal canal.

Epidermal Cyst↗