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Biomedical subjects

Y Yasuno

Publications and source records attributed to Y Yasuno.

7 recordsLinked to original sources
PubMed1994

Clinical characteristics of halitosis: differences in two patient groups with primary and secondary complaints of halitosis.

Halitosis, defined as an unpleasant oral odor, has become a health concern among the general public. The objective of this study was to evaluate the diversity of clinical characteristics of halitosis of the patients who visited dental clinics. Sixty-eight patients with primary complaints of halitosis and 19 patients with primary complaints of periodontal diseases but secondary complaints of halitosis were studied by organoleptic examination. The patients with primary complaints were diagnosed as having halitosis in fewer cases than the patients with secondary complaints-25% and 53%, respectively. Patient complaints for halitosis were further categorized, by questionnaire, into three types: Type 1, self-conscious; Type 2, conscious by the indication of others; and Type 3, conscious by presumptions from the attitude of others. Although 80% of the patients of both groups were of Type 1, only 24.1% of the Type 1 patients with primary complaint, in comparison with 50% of the Type 1 patients with secondary complaint, were actually found to have halitosis. The results suggest that the majority of patients with primary complaints of halitosis at the dental clinic did not actually have halitosis, but suffered from an imaginary halitosis due to presumptions based upon others' attitudes. After treatment, these patients were more likely to be dissatisfied than patients who had visited the clinic with halitosis as their secondary complaint.

Adult↗
PubMed1993

Hypothenar hammer syndrome in workers occupationally exposed to vibrating tools.

Among 330 vibration-exposed workers, 24 cases of hypothenar hammer syndrome in 29 hands were diagnosed by arteriography. The right hand was involved in 13, the left hand in six, and both hands in five cases. The mean age was 55 years, mean duration of vibration exposure 19.4 years, and mean duration of episodic Raynaud's phenomenon 6.4 years. The vascular lesions of the ulnar arteries were classified into three major types with subtypes. Type 1: stenosis of the superficial palmar arch around the hook of the hamate. Type 2a: occlusion of the superficial palmar arch around the hook of the hamate. Type 2b: occlusion of both superficial and deep palmar arches around the hook of the hamate. Type 3a: occlusion of the ulnar artery at the proximal part of the wrist. Type 3b: occlusion of the ulnar artery near the wrist with the occlusion of the dorsal carpal branch of the ulnar artery.

Adult↗
PubMed1982

Construction of a composite thin-element TLD using an optical-heating method.

A composite thermoluminescent dosimeter (TLD), composed of four, thin TL elements with a high-speed reader, has been developed by employing an optical-heating method. Each TL element, which is 15 mg/cm2 thick with a 3 mm dia., is prepared by applying Li2B4O7:Cu or CaSO4:Tm to a plastic substrate 14 mg/cm2 thick. Each element can be heated to 350 degree C within 0.8 sec. by IR radiation from a tungsten lamp. The characteristics of this TLD system include the following: (1) the detection limit of the Li2B4O7:Cu is 3 mR and the limit for CaSO4:Tm is 0.1 mR; (2) the energy-dependence curves are similar to the dose-equivalent curve, showing slight under-responses by 15% near 70 KeV for Li2B4O7:Cu and over-responses by 50% at high energies for CaSO4:Tm; (3) despite quick heating, the residual dose is as low as 0.1% of the last exposure signal; (4) responses are very stable for more than 1,000 cycles of repeated exposure readings; (5) no false signal could be detected, even in the cases of sweat or soil contamination; (6) the thin Li2B4O7;Cu element can be used for skin dose monitoring; and (7) the processing time of the automatic reader for the composite dosimeter is 3 hr/500 dosimeters. This TLD system can be applied to personnel dosimetry, gate monitoring and environmental monitoring.

Borates↗