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Biomedical subjects

M Futatsuka

Publications and source records attributed to M Futatsuka.

65 records · Page 4Linked to original sources
PubMed1982

Quantitative observations on thermal and metabolic responses to cold of workers using vibrating tools.

Quantitative observations on thermal and metabolic responses of 32 patients exposed to moderate cold of vibration hazards due to using chain saw were performed. In this study, many cases showed trends of both in increase of metabolic rate and decrease of mean skin temperatures. The ratio of 60 min mean value of the increase of metabolic rate/decrease of mean skin temperature is 3.5 +/- 2.60. Twenty-two patients (68.8%) indicated the value larger than 3. There are many with markedly large increase in metabolic rate in those who affected Raynaud's phenomenon. It can be suggested that many of the patients with the vibration hazards indicate an decrease of the cold tolerance ot the moderate cold exposure.

Adult↗
PubMed1979

Follow-up studies on the distribution of haemoglobin levels in female farm workers.

Haemoglobin concentrations in about 1000 women agricultural workers in Japan were measured every year, except in 1972, during the period 1967-77. Improvements were noted in the course of this investigation, and these were predominantly associated with the fact that those in the study community began to pay attention to the problem of low haemoglobin levels and to improve their diet, with an increase in daily food intake, particularly of animal protein and iron. In addition, a marked decrease in anaemia caused by hookworm also played an important role. In this paper, the change in haemoglobin concentration during the period of study are described and the aetiology is discussed.

Adult↗
PubMed1979

[A study on the vibration hazards due to using bush cutters (author's transl)].

Bush cutters were introduced into Japanese forestry for cutting bush in 1957 or thereabout. Thereafter, they have been used widely not only in forestry but also in agriculture, public engineering, etc. In spite of the fact that vibration acceleration levels of the bush cutters are high, vibration hazards due to using these tools have not been studied. The reason lies in few professions using bush cutters exclusively. Moreover, the tool is only used seasonally from June to September. The author examined 641 bush cutters users in the State Forestry in southern Kyushu and compared the results with a sample of chain saw users matched by age, duration of use, and district. The prevalence rate of Raynaud's phenomenon is 0.4% at 4 years after beginning the use of bush cutters, 4.0% after 10 years and 9.2% after 18 years. The prevalence of Raynaud's phenomenon in chain saw users is twice as great as that in bush cutter users. Bush cutter users are attacked by Raynaud's phenomenon after about 1,000 hours' use of the tool. The difference is regarded to depend on the difference in the density of use and the difference in the levels of vibration acceleration. The vibration hazards due to using bush cutters were characterized by relatively mild complaints in the upper extremities, together with disturbances of peripheral circulation but not always with peripheral neuropathy.

Adult↗
PubMed1976

[An epidemiologic study on vibration hazards among workers at the state forests in Kyushu (author's transl)].

There are only very few reports of epidemiologic analysis on vibration hazards among the workers at the state forests of Japan since 1970. It was necessary to perform investigations on the state of vibration hazards anew, through some labor hygienic policies on the prevention of the hazards, such as regulation of the time of using vibrating tools, had been executed to some extent since 1970. From the data of physical check-ups of 861 chain saw users of 24 District Forestry Offices in Kumamoto, Miyazaki and Kagoshima Prefectures in the south of Kyushu, the transition of vibration hazards was studied by using the incidence and prevalence of Raynaud's phenomenon and paresthesia of the fingers as indices. From the yearly transition of the hazards, a tendency was observed of increasing patients with vibration syndrome during the period from 1962 to 1970 when countermeasures on vibration hazards were not sufficient. However, since 1970 the occurrence of Raynaud's Phenomenon has shown a tendency to decrease among the workers with short history of using chain saw and the occurrence of paresthesia of the fingers as indices. From the yearly transition of the hazards, a tendency was observed of increasing patients with vibration syndrome during the period from 1962 to 1970 when countermeasures on vibration hazards were not sufficient. However, since 1970 the occurrence of Raynaud's Phenomenon has shown a tendency to decrease among the workers with short history of using chain saw and the occurrence of paresthesia of the fingers to increase among those with long history. The results are suggestive of making clear the pathophysiology of vibration hazards.

Fingers↗
PubMedDate not supplied

Effect of cigarette smoking on prevalence of summer-type hypersensitivity pneumonitis caused by Trichosporon cutaneum.

We investigated the effect of cigarette smoking on the prevalence of summer-type hypersensitivity pneumonitis (SHP) caused by Trichosporon cutaneum. In the adult family members of SHP patients, we found that 27 of 41 (65.9%) nonsmokers were SHP patients, compared with 3 of 11 (27.3%) smokers (p less than .05). Also, the prevalence of anti-T. cutaneum antibody was significantly lower in the smokers (p less than .05). A questionnaire provided to 209 SHP patients revealed that the smoking rates of male and female SHP patients were significantly lower (p less than .01) than rates in the normal Japanese population. However, no difference was found in serum anti-T. cutaneum antibody activities or the bronchoalveolar lavage lymphocyte phenotypes for smoking and nonsmoking SHP patients. It was concluded that cigarette smoking had a suppressive effect on the outbreak of SHP, but smoking caused no further suppression after the disease was established.

Adult↗