Le centre de référence s’efforce de s’assurer que l’information qu’il fournit est exacte et exhaustive. A Key to the Stellar Dynamo. Background spectra and light curves were extracted from a region of the detector free of sources and of 40 pixels radius. We thus cannot exclude other types for the companion star. For both groups there was a significant difference in ratings between the two climate types.
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Caisse régionale d’assurance maladie du Nord. The average change in finger temperature per minute was calculated for each individual and is given in fig 5. Des études précédentes en photométrie et spectroscopie Kiraga and Stepien, ; Bonfils et al. Average speech reception threshold scores an index of hearing impairment at lower speech frequencies , monosyllabic word discrimination test scores a measure of speech distortion , and mean hearing thresholds for the two age groups according to severe noise-induced hearing loss categories were also determined Table 2. All sources with a signal-tonoise ratio greater than 6 in the 20Y40 keV ranges were considered.
De plus, en ce qui concerne les médecins responsables, leurs liens sont peu établis avec les médecins traitants alors que ce sont ces derniers qui suivent les travailleurs atteints d’infections, de dermatoses ou de problèmes musculo-squelettiques.
HABILITATION`A DIRIGER DES RECHERCHES Jérôme – CEA-Irfu
Il n’y a pas non plus de guide de surveillance standardisé. La prévention des maladies professionnelles exigera un suivi régulier, une recherche des causes et des interventions aussi bien en hygiène qu’en ergonomie. Par ailleurs, nous avons dû aborder dans nos documents des risques à la santé qui sont communs à d’autres secteurs.
Par exemple, les risques biologiques et 188.8.131.52 zoonoses se retrouvent surtout dans l’agriculture, mais par continuité se rencontrent souvent dans l’alimentation.
D’autres problèmes de santé comme le travail de nuit se retrouvent dans l’alimentation, mais sont plus fréquents dans la fonction publique. Compte tenu de la variété des risques présents dans le secteur Aliments et Boissons, le document de référence que nous vous présentons ici se compose principalement d’un ensemble de textes de référence associés à chacun des principaux risques. Un texte les accompagne et se limite à des définitions et explications visant à orienter les activités. Nous espérons que ce recueil pourra inspirer les intervenants dans leur travail auprès des travailleurs et employeurs de ce secteur d’activités.
Day, PhD; and Erick K. Ishii, MPH The pressât study assessed the relationships among occupational noise exposure, noise-induced hearing loss, and high blood pressure. Body mass index and alcohol intake were significantly related to systolic and diastolic blood pressure. Multiple regression analysis revealed W MAX and severe noise-induced bearing loss were independent predictors of hypertension in the older, but not in the younger group of retired workers.
Noise-induced hearing loss is a major cause of disability. Cathedral of Learning Dr Findlay. The first involves the determination of noise exposure, both intensity and duration, and the assessment of blood pressure status in noise exposed and comparison populations The second group of studies utilized varying definitions of noise-induced hearing loss as a marker for noise exposure.
The blood pressure status of occupationally noise exposed workers was then compared by hearing loss categories These studies have been reviewed in detail. The previous study’ 9 did not explore the potential effect of interference with speech discrimination and recruitment to loud fasy that may occur in noise exposed populations.
The observed relationship .50.3.8 be confounded with another variable, uide of social isolation from communication handicap and interference with lifestyle. This phenomenon may affect older men in the group in which we observed our greatest blood pressure difference. The plant that employed these men was divided into six major sections: These are not partitioned by walls of any kind.
The workers in the plant are engaged in the fabrication and partial assembly of large metal parts. A sound survey was conducted using both a Gen Rad A sound level meter as well as a Metro Logger db dosimeter. The average noise level within the plant was 89 dba. The noise has been described as continuous and severe in all areas of the plant. A normal conversation is considered impossible. Since there has easu a mandatory hearing conservation program in effect.
However, beforevery few of the men used hearing protection of hhide kind. A total of workers were ineligible because they had moved out of the state or lived beyond the mile radius of our study area. Eas the remaining, were ineligible because they were over or under age or currently working. Sixty-eight was chosen as the cutoff because the small numbers available at older ages may unduly confound the effects of noise exposure.
Fifteen people from the original sample were deceased, 67 refused and were screened. An additional 42 were unable to be. The overall response rate was Clinical examination included 5.03.8 of height, weight, pulse, and blood pressure, as well as a detailed medical and personal habit history, alcohol consumption, and smoking patterns.
There was also a detailed questionnaire on occupational and military history and noisy hobbies. The examination and interview were administered at the union hall.
An audiometric evaluation was also conducted. This consisted of air and bone conduction, audiometry, speech reception threshold, word discrimination testing, and an index of social interaction and communication. Multiple blood pressure measurements using standard procedures were implemented in this investigation. The following standardized procedures were utilized. All blood pressure measurements were hie using the participant’s right arm in a sitting position.
A standard mercury sphygmomanometer and random zero device were used for all measurements. The first measurements of each set of three wore taken with the standard device followed by two’ readings of the zero muddler.
The systolic and diastolic blood pressures of each worker were determined by the overall mean of four zero muddler measurements at one time. The first and fifth Korotkoff sounds were recorded as the systolic and diastolic blood pressure, respectively.
In addition, a history of cardiovascular disease and history of treatment for high blood pressure were obtained. The use of antihypertensive therapy was also ascertained including both current and previous use. Standardized audiometric testing procedures were used. The testing was conducted by a certified audiologist. The procedure used for hiee the pure-tone audiogram includes the basic features of the Hughson Westlake technique for determining hice pure-tone hearing threshold.
The audiometers were initially calibrated and periodically checked thereafter. The sound pressure output of the audiometer was calibrated monthly.
A noise exposure questionnaire, which outlined information on employment, hobbies, military service, hearing disorders, was administered to each worker.
The revised Hearing Performance Inventory HPI developed by Lamb et al 81 to assess the communicative difficulty of hearing-impaired persons in a variety of everyday listening situations was administered to this population.
The Interpersonal Support Evaluation has been employed in a total of 12 studies as a measure of support functions. For psychometric properties, correlation, and scale validity refer to Cohen et al 8 Responses to 36 items on the Interpersonal Aesy Evaluation and six questions designed to measure anxiety were administered.
Responses to the 40 questions were categorized into six choices: I agree very much, I agree pretty much, I agree a little, I disagree a little, I disagree pretty much, and I disagree very much. Results Cohort Description The age distribution of the total group is shown in Table 1. The present study utilized two age strata consisting of 56 to 63 years and 64 to 68 years. Diastolic blood pressure did not vary markedly with age. No consistent pattern in blood pressure by total years of employment was noted.
Therefore, this cohort had been removed from daily exposure to noise for approximately 4 years.
Ninety percent were currently married. Neither education or marital status was related to blood pressure in this sample. These noise insults might produce a cumulative effect on the acoustic mechanism and might affect 5.0.38.
exposure marker, noise-related hearing loss. Workers who reported currently taking blood pressure medications exhibited higher systolic and diastolic blood pressure than those not reporting such usage mean BP .50.3.8 may reflect poor compliance or poor hypertension control in this population.
In contrast, those workers reporting a history of heart disease had slightly lower diastolic blood pressures than workers reporting no history of hypertension mean BP A history of hypertension in the immediate family was noted for Those reporting a family history of hypertension also exhibited higher systolic and diastolic blood pressure. Alcohol consumption patterns were detailed by a selfreport of the type, quantity, frequency, and variability of alcohol use.
Hearing Levels Mean hearing levels across various frequencies are shown in Figs. It can be seen that there is significant hearing loss in this population, particularly in the high frequencies, with average decibel loss at There is some mild recovery evidenced at and Hz.
The mean threshold levels for the right and left ears of all participants indicate differences between ears no greater than 2. The combined results of our subjects demonstrate hearing within normal limits through 1,0 khz, followed by a progression of hearing loss that begins with a decline of 12 dba between 1,0 khz and 2. The audiogram WM consistent with noise-induced hearing loss Figs.
Severe noise-induced hearing loss was defined as a threshold greater than or equal to 65 decibels, at 3, 4, or 6 khz within 20 dba in the contralateral ear. Average speech reception threshold scores an index of hearing impairment at lower speech frequenciesmonosyllabic word discrimination test scores a measure of speech distortionand mean hearing thresholds for the two age groups according to severe noise-induced hearing loss categories were also determined Table 2.
Mean hearing loss levels in the right ear for workers in the noisy plant exposed workers. Mean hearing levels in ihe left ear for workers in the noisy plant exposed workers.
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Speech reception aesy and speech discrimination scores did not differ according to noiseinduccd hearing loss in the 56 to year-old up. W MAX represents the maximum speech discrimination score for the better ear when words are presented 5.3.8 combination with competing noise.
It was usually more difficult to hode speech in noise than in quiet conditions. In the case of the two older age groups, subjects with less noise-induced hearing loss scored 7. Thus, differences in degree of higher frequency hearing loss appear related to ability to discriminate speech stimuli, particularly in the presence of competing noise. Hypertension and Its Risk Factors According to Hearing Levels The mean ages of the younger group with and without noise-induced loss were similar Their average years of employment were For older men with or 5.3.8 severe noise-induced hearing loss, the mean age was Body mass index was similar A greater proportion of severe noise-induced hearing loss workers aged 64 to 68 years were currently taking blood pressure medications The mean unadjusted blood pressures for these two groups were mm Hg and mm Gide systolic, respectively, and mean diastolic There were no significant differences between the mean systolic or diastolic blood pressure for either age group dichotomized by hearing loss category Table 3.
Among men 64 to 68 years of age, there was a trend toward increased prevalence of high blood pressure in those with severe noise-induced hearing loss compared with those not meeting this criteria 39 of 77 [ No evidence of a relationship was seen among men aged 56 to 63 years. The overall distribution of speech discrimination scores by hypertension status is shown in Fig.