Vibration - 974 entries found
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Meyer J.P., Flenghi D., Deschamps J.P.
Effects of manual handling, posture, and whole body vibrations on low-back pain
To determine the effect of occupational stress on low-back pain (LBP), workers exposed to 3 kinds of stress, manual handling (MH, 82 women and 264 men), whole body vibration (WBV, 274 men) and static postures (278 women), were interviewed. Anthropometric data, occupational stress, LBP severity and frequency and a psychological evaluation of these groups were compared with those of a control population of 104 men and 104 women. The results show age and the body mass index of the workers were the parameters most closely associated with LBP. Women involved in MH had higher frequency and severity of LBP than their reference population. Men involved in MH or exposed to WBV had higher frequency of painful episodes than their reference population. Workers exposed to one of the stresses were on sick leave with LBP more often, and for longer periods, than workers in the reference group. Individual factors are often decisive in the onset of LBP, but occupational stress can be an aggravating factor for serious LBP cases.
International Journal of Occupational Safety and Ergonomics, 1998, Vol.4, No.4, p.449-470. Illus. 22 ref.
Health and Safety Executive
Hand-arm vibration. Advice for employers and advice on vibration white finger for employees and the self-employed
Risgiau i iechyd o ddirgryniad llaw-braich: Cyngor i gyflogwyr; Cyngor i weithwyr a'r hunan-gyflogedig [in Welsh]
Translation into Welsh of the document originally abstracted as CIS 94-1885. The first of these two booklets provides advice to employers on the injuries caused by hand-arm vibration, jobs affected, control measures, information and training for employees and health surveillance. The second is aimed at employees and describes the nature and symptoms of vibration white finger, the causes of the problem and ways of reducing the risk.
HSE Books, P.O. Box 1999, Sudbury, Suffolk CO10 6FS, United Kingdom, 1998. 2 booklets (15p. and 7p.). 6 ref.
Loval G., Danière P., Loyau T.
Vibro-acoustic diagnosis: A fundamental stage in machine noise reduction at the source
Le diagnostic vibro-acoustique: une étape fondamentale de la réduction à la source du bruit des machines [in French]
Machine noise reduction at the source is effective at all workplace points (near and far fields), it gives permanent results, improves comfort at work and does not involve constraints in terms of machine operation and maintenance. Its effectiveness depends directly on a proper vibro-acoustic diagnosis. After highlighting the main mechanisms of machine noise propagation, the paper describes the diagnostic methods available as a function of the treated aspect (generating mechanisms, transmission paths, radiant surfaces), discusses the advantages and disadvantages of each method in an industrial context and compares the usefulness of methods combining relatively simple measurements and modelling of vibration and noise propagation mechanisms. Examples of application to three industrial situations are provided: a concrete vibrating machine, a diesel locomotive and a motor-driven pump.
Cahiers de notes documentaires - Hygiène et sécurité du travail, 3rd Quarter 1998, No.172, Note No.2082-172-98, p.243-255. Illus. 15 ref.
Effects of vibration on the musculoskeletal system
Skelettbelastung durch Schwingungseinwirkung [in German]
Topics: applied research; electromyography; hazard evaluation; muscular strength; spinal column; spinal diseases; vibration damage risk criteria; vibration disease; whole-body vibration.
Sicher ist Sicher, May 1998, Vol.49, No.5, p.223-228. Illus. 6 ref.
Evaluating the effectiveness of gloves in reducing the hazards of hand-transmitted vibration
The isolation effectiveness of vibration protective gloves was calculated from the measured transmissibility of the glove, the vibration spectrum on the handle of a specific tool and the frequency weighting, indicating the degree to which different frequencies of vibration cause injury. The method was used to test ten gloves with 20 different powered tools. The frequency weighting for hand-transmitted vibration advocated in current British and international standards greatly influences the apparent isolation effectiveness of gloves. With the frequency weighting, the gloves had little effect on the transmission of vibration to the hand from most of the tools. Only for two or three tools (those dominated by high frequency vibration) did any glove provide useful attenuation. Without the frequency weighting, some gloves showed useful attenuation of the vibration on most powered tools.
Occupational and Environmental Medicine, May 1998, Vol.55, No.5, p.340-348. Illus. 14 ref.
Malchaire J., Piette A., Cock N.
Whole-body vibration - Strategy for the assessment and control of hazards
Vibrations corps total - Stratégie d'évaluation et de prévention des risques [in French]
Globale lichaarmstrillingen - Stategie voor evaluatie en preventie van risico's [in Dutch]
Topics: Belgium; check lists; description of technique; drivers seats; earthmoving equipment; elevating platform trucks; exposure evaluation; legislation; length of exposure; limitation of exposure; maintenance; medical supervision; overhead travelling cranes; training manuals; training material; trucks; vibration acceleration; vibration control; vibration damping; vibration measurement; vibration transmission; whole-body vibration; work posture.
Federaal Ministerie van Tewekstelling en Arbeid, Belliardstraat 51, 1040 Brussels, Belgium, 1998. 66p. Illus. Bibl.ref.
Malchaire J., Piette A., Cock N.
Hand-arm vibration - Strategy for the assessment and control of hazards
Vibrations mains-bras - Stratégie d'évaluation et de prévention des risques [in French]
Trillingen van net hand-arm-systeem - Stategie voor evaluatie en preventie van risico's [in Dutch]
Topics: Belgium; check lists; description of technique; exposure evaluation; hand-arm vibration; legislation; length of exposure; limitation of exposure; maintenance; medical supervision; tool handles; training manuals; training material; vibrating tools; vibration control; vibration damping; vibration measurement; vibration transmission; work posture.
Federaal Ministerie van Tewekstelling en Arbeid, Belliardstraat 51, 1040 Brussels, Belgium, 1998. 62p. Illus. Bibl.ref.
Schwarze S., Notbohm G., Hartung E., Dupuis H.
Vibration as a risk factor for back disorders
Schwingungsbelastung als gesundheitlisches Risiko für die Lendenwirbelsäule [in German]
Vibration exposure was determined for 388 drivers of forklift trucks, earthmoving machinery and trucks. Histories of back disorders of the drivers were compiled and a clinical examination, including X-rays of the lumbar spine, was performed in each case. The examinations took place between 1990 and 1992 and were repeated four years later. A total of 281 drivers participated in the follow-up examinations.. The first examinations, yielded a significantly higher frequency of back disorders in the group with the highest Vibration exposure compared with an age-adjusted control group with low Vibration exposure. Of 111 persons who did not suffer from problems at the time of the first examinations, 54 (48.6%) were found to have back disorders at the follow-up examinations. Topics: back disorders; construction industry; dose-response relationship; drivers; epidemiologic study; long-term study; lumbar column; vibration acceleration; vibration; whole-body vibration.
Die BG, Nov. 1998, No.11, p.690-695. Illus. 16 ref.
Lindsell C.J., Griffin M.J.
Health and Safety Executive
Standardised diagnostic methods for assessing components of the hand-arm vibration syndrome
Topics: description of technique; diagnosis; fingers; hand-arm vibration; nervous function tests; neurological effects; sensation tests; skin temperature; vascular function tests; vibration disease; vibration frequency; vibration intensity; vibration perception threshold; vibration sensitivity.
HSE Books, P.O. Box 1999, Sudbury, Suffolk CO10 6FS, United Kingdom, 1998. iv, 87p. Illus. Bibl.ref. Price: GBP 25.00.
Vibration-induced white finger and cold response of digital arterial vessels in occupational groups with various patterns of exposure to hand-transmitted vibration
The change in finger systolic blood pressure (FSBP) at 15 and 10°C as the percentage of the pressure at 30°C (FSBP%) was measured in 455 healthy referents and 822 workers exposed to hand-transmitted vibration from vibrating tools. The prevalence of white finger was 1.1% for the referents and ranged from 9.0% to 51.6% for the vibration-exposed groups. After adjustment for age, smoking and drinking habits, the FSBP% was significantly lower in the vibration-exposed groups than in the reference group. Groupwise, the FSBP% was inversely related to the prevalence of white finger, the estimated exposure and total operating time. FSBP measurement during cold provocation is a useful laboratory test for white finger. A quantitative relationship between cold-induced digital arterial hyperresponsiveness and occupational exposure to hand-transmitted vibration was suggested. Topics: age; alcoholism; blood pressure; blood vessels; cold pressor test; dose-response relationship; fingers; hand-arm vibration; Raynaud's phenomenon; smoking; vibrating tools.
Scandinavian Journal of Work, Environment and Health, Apr. 1998, Vol.24, No.2, p.138-144. Illus. 18 ref.
Bovenzi M., Lindsell C.J., Griffin M.J.
Duration of acute exposures to vibration and finger circulation
Finger skin temperature, finger blood flow and finger systolic blood pressure were measured in the middle fingers of both hands of 10 men. Finger vascular resistance was also estimated. The right hand was exposed for 7.5, 15 and 30min (static load 10N) to 125-Hz vibration. Static load only was used as a control. Finger circulation was measured before exposure and at fixed intervals during exposure and during a 45min recovery period. Vibration produced significant reductions in finger blood flow and increases in vascular resistance at each duration. Temporary vasodilation occurred in the middle finger immediately after each vibration exposure. The longer the duration of vibration exposure, the stronger the vasoconstriction in the vibrated finger during recovery. It is concluded that not only the frequency and magnitude of vibration but also its duration contributes to the reaction of the digital vessels to acute vibration. Topics: blood pressure; circulatory disorders; fingers; hand-arm vibration; length of exposure; Raynaud's phenomenon; short-term exposure; skin temperature; vascular function tests; vasoconstriction; vasodilatation; vibration amplitude; vibration frequency.
Scandinavian Journal of Work, Environment and Health, Apr. 1998, Vol.24, No.2, p.130-137. Illus. 22 ref.
Palmer K., Crane G., Inskip H.
Symptoms of hand-arm vibration syndrome in gas distribution operatives
153 gas distribution operatives were assessed by an administered questionnaire, a clinical examination, and a simple cold challenge test to the hands. Past vibration exposures were estimated. On average, the sample had spent 16 years in employment involving use of vibratory tools. The risks of blanching and neurological complaints rose significantly with lifetime hours of use of vibrating tools and lifetime dose of vibration. Symptoms were generally mild and apparent only after a prolonged interval, but there were exceptions, and cases had occurred after lower recent exposures. It has been suggested that aspects of the gas distribution operative's work mitigate against the risk normally anticipated from use of pneumatic road breaking tools. By contrast these data suggest that symptoms of hand-arm vibration syndrome do occur, given sufficient exposure, a finding relevant not only to gas supply workers, but also to workers from other industries who break and repair road surfaces. Topics: carpal-tunnel syndrome; dose-response relationship; epidemiologic study; exposure evaluation; gas distribution; hand-arm vibration; paraesthesia; pneumatic tools; Raynaud's phenomenon; road work; vibrating tools; vibration disease.
Occupational and Environmental Medicine, Oct. 1998, Vol.55, No.10, p.716-721. 26 ref.
Efficacy of vibration, electric current and thermal perception tests in diagnosis of hand-arm vibration syndrome
Vibration perception test is usually proposed as a useful tool for quantitative assessment of neurological disturbances induced by hand-arm vibration syndrome (HAVS). The increased mean vibration perception threshold (VPT) is an early manifestation of this syndrome. However, a group of exposed subjects was identified with normal VPT who showed electric current and/or thermal sensitivity impairment. The intensity of quantitative disorders of vibration and electric current sensitivity was closely related to the duration of vibration exposure. Thermal perception was diminished in subjects working for a longer period of time, but there was no relationship between the intensity of disorders and the duration of exposure. In an early stage of HAVS, the use of three tests, instead of a single vibration test, helps to identify a larger number of workers at risk who should undergo thorough diagnostic examinations. In this study, the proportion of identified workers increased from 27% (32 subjects with vibration sensory impairment) to 45% (53 persons with disorders detected in one, two or even three tests). Topics: chain saws; diagnosis; drilling machines; hand-arm vibration; high-frequency vibration; long-term exposure; perceptual-motor performance tests; statistical evaluation; thermal methods of analysis; vibration disease; vibration perception threshold.
International Journal of Occupational Medicine and Environmental Health, 1998, Vol. 11, No.3, p.247-254. Illus. 15 ref.
Exposure-response relationship in the hand-arm vibration syndrome: An overview of current epidemiology research
While there is epidemiologic evidence for an increased risk of peripheral sensorineural disorders and bone and joint disorders in workers exposed to hand-transmitted vibration, the available data are insufficient to outline an exposure-response relationship. The association between white finger (Raynaud's phenomenon) and exposure to hand-transmitted vibration has been clearly established, although the form of the relationship is not yet fully clarified. Further research is required to determine how the response of the hand and arm depends on the physical characteristics of vibration and other variables connected with vibration exposure. Topics: comment on directive; dose-response relationship; epidemiologic study; grip strength; hand-arm vibration; limitation of exposure; literature survey; neurological effects; osteoarthropathy; prediction; pushing strength; Raynaud's phenomenon; vascular diseases; vibrating tools; vibration disease; vibration perception threshold.
International Archives of Occupational and Environmental Health, Nov. 1998, Vol.71, No.8, p.509-519. Illus. 61 ref.
Bovenzi M., Alessandrini B., Mancini R., Cannavà M.G., Centi L.
A prospective study of the cold response of digital vessels in forestry workers exposed to saw vibration
The occurrence of vibration-induced white finger (VWF) and the cold response of digital vessels were examined in a group of 68 forestry workers using chain saws. Workers were examined in 1990 and again in 1995. Results indicate that a reduction or cessation of exposure to vibration has a beneficial effect on finger-blanching symptoms and on the cold response of digital vessels. Since a few new cases of VWF occurred during the follow-up period in workers using only antivibration chain saws, health surveillance of workers using these machines should be maintained. Topics: chain saws; cold pressor test; exposure evaluation; fingers; hand-arm vibration; logging and forestry operations; long-term study; Raynaud's phenomenon; vibration measurement.
International Archives of Occupational and Environmental Health, Oct. 1998, Vol.71, No.7, p.493-498. 20 ref.
Hand-arm vibration syndrome - Health effects of hand held vibrating tools
Shuwankei shindou shougai - temochi doryoku kougu niyoru kenkou eikyou [in Japanese]
Observations indicating a chronic autonomic disturbance include changes in cardiac function, excessive hearing loss in persons with vibration-induced white finger (VWF), and reduced toe skin temperature even in the absence of acute cold or vibration exposure. Sympathetic hyperactivity alone has long been postulated to account for VWF, but damage to vasoregulatory structures and functions in the finger skin now also seems to be involved. An abnormal level of sympathetic efferent activity may be important in producing the symptoms of VWF. Topics: dose-response relationship; epidemiologic study; hand tools; hand-arm vibration; literature survey; Raynaud's phenomenon; vibrating tools; vibration disease.
Occupational Health Review, May 1998, Vol.11, No.1, p.27-48. Illus. 60 ref.
Antivibration platforms for asphalt-laying machines
Plates-formes antivibratiles pour les finisseurs routiers [in French]
Topics: construction equipment; description of equipment; road work; vibration damping; vibration dosimetry.
Travail et sécurité, Jan. 1998, No.568, p.30-34. Illus. 1 ref.
Hadler N.M., Bernard B., Nelson N., Estill C.F., Fine L.
Vibration white finger revisited
Topics: chain saws; diagnosis; dose-response relationship; epidemiologic study; forestry and logging; hand-arm vibration; literature survey; permissible levels; pneumatic tools; quarrying industry; Raynaud's phenomenon; vibrating tools; vibration disease.
Journal of Occupational and Environmental Medicine, Sep. 1998, Vol.40, No.9, p.772-785. 90 ref.
Sorainen E., Penttinen J., Kallio M., Rytkönen E., Taattola K.
Whole-body vibration of tractor drivers during harrowing
The seat vibration of nine tractors was investigated while harrowing was being performed. In all cases, the average vibration of the seat exceeded the 8h "fatigue-decreased proficiency boundary" specified in the international standard ISO 2631/1. The instantaneous accelerations of the most harmful one-third octave band of vibration were sometimes two- to threefold compared with the average. More technical development is needed to reduce seat vibration to a safe level. Topics: agricultural operations; back disorders; backache; drivers; tractors; vibration acceleration; vibration measurement; whole-body vibration.
American Industrial Hygiene Association Journal, Sep. 1998, Vol.59, No.9, p.642-644. Illus. 8 ref.
Huang D.S., Fan Q., Tan C.A.
Experimental investigations on the active vibration control of chain drives
A nonlinear active feedback control strategy to suppress the transverse vibrations in power transmission chain drives is described. Experimental results show that vibrations may be reduced by up to 90%. Chain noise can also be reduced by about 3.3dB. The control technique is readily transferred to an industrial environment. Topics: chain transmissions; experimental determination; mechanical power transmission; noise and vibration measurement; noise level; vibration amplitude; vibration control; vibration damping.
Noise Control Engineering Journal, July-Aug. 1998, Vol.46, No.4, p.139-145. Illus. 27 ref.
Special issue: Vibration effects on human body - Whole-body vibration and hand-transmitted vibration
Topics: agricultural equipment; backache; biological effects; cold pressor test; comment on standard; diseases of peripheral nervous system; drivers seats; drivers; exposure evaluation; fingers; forestry; gastrointestinal diseases; hand tools; hand-arm vibration; medical supervision; power-driven hand tools; skin temperature; tractors; vibration control; vibration disease; vibration measurement; vibration perception threshold; whole-body vibration.
Industrial Health, Apr. 1998, Vol.36, No.2, p.83-208. Illus. Bibl.ref.
Kákosy T., Németh L., Hazay B., Posgay M., Martin J., Lászlóffy M.
Hand-arm vibration syndrome on tunnel-miners
Topics: carpal-tunnel syndrome; circulatory disorders; epidemiologic study; hand-arm vibration; neurological effects; osteoarticular deformities; pneumatic picks; Raynaud's phenomenon; tunnelling; vibration disease; vibration measurement.
Central European Journal of Occupational and Environmental Medicine, 1998, Vol.4, No.1, p.91-98. Illus. 13 ref.
Griffin M.J., Lindsell C.J.
Health and Safety Executive
Cold provocation tests for the diagnosis of vibration-induced white finger: Standardisation and repeatability
Topics: blood pressure measurement; cold pressor test; diagnosis; evaluation of technique; fingers; Raynaud's phenomenon; report; United Kingdom; vascular function tests; vibration.
HSE Books, P.O. Box 1999, Sudbury, Suffolk CO10 6FS, United Kingdom, 1998. iv, 38p. Illus. 17 ref. Price: GBP 15.00.
Tomida K., Morioka I., Kaewboonchoo O., Yamamoto H., Miyai N., Ishii N., Miyashita K.
Evaluation of finger skin temperature by cold provocation test for diagnosis of vibration induced white finger (VWF)
Topics: chain saws; cold pressor test; exposure evaluation; hand-arm vibration; Japan; Raynaud's phenomenon; skin temperature; vascular function tests; vibrating tools; vibration.
Industrial Health, Jan. 1998, Vol.36, No.1, p.20-26. Illus. 18 ref.
Health and Safety Executive
Health risks from hand-arm vibration - Advice for employees and the self-employed
Topics: hand-arm vibration; health hazards; limitation of exposure; Raynaud's phenomenon; responsibilities of employees; safety guides; small enterprises; United Kingdom; vibrating tools.
HSE Books, PO Box 1999, Sudbury, Suffolk CO10 6FS, United Kingdom, Apr. 1998. 8p. Illus. 4 ref.
Health and Safety Executive
Health risks from hand-arm vibration - Advice for employers
Topics: check lists; hand-arm vibration; hazard evaluation; health hazards; information of personnel; legislation; limitation of exposure; medical supervision; Raynaud's phenomenon; responsibilities of employers; safety by design; safety guides; supply of information; United Kingdom; vibrating tools; vibration control.
HSE Books, PO Box 1999, Sudbury, Suffolk CO10 6FS, United Kingdom, Apr. 1998. 15p. Illus. 7 ref.
Malchaire J., Rodriguez Diaz L.S., Piette A., Gonçalves Amaral F., de Schaetzen D.
Neurological and functional effects of short-term exposure to hand-arm vibration
Topics: grip strength; hand-arm vibration; manual dexterity; mathematical models; nervous conduction; neurological effects; neuromuscular disorders; paresis; short-term exposure; vibration perception threshold.
International Archives of Occupational and Environmental Health, June 1998, Vol.71, No.4, p.270-276. Illus. 25 ref.
Burström L., Lundström R.
Portable equipment for field measurement of the hand's absorption of vibration energy
Topics: comment on standard; description of equipment; energy absorption; evaluation of technique; hand-arm vibration; power-driven hand tools; vibration measurement; vibration transmission.
Safety Science, Feb. 1998, Vol.28, No.1, p.15-20. Illus. 9 ref.
Burström L., Lundström R., Hagberg M., Nilsson T.
Comparison of different measures for hand-arm vibration exposure
Topics: comment on standard; comparative study; energy absorption; evaluation of technique; exposure evaluation; hand-arm vibration; length of exposure; power-driven hand tools; vibration acceleration; vibration dosimetry; vibration intensity; vibration measurement.
Safety Science, Feb. 1998, Vol.28, No.1, p.3-14. Illus. 17 ref.
Mechanical vibration and shock - Hand-arm vibration - Method for measuring the vibration transmissibility of resilient materials when loaded by the hand-arm system
Vibrations et chocs mécaniques - Vibrations main-bras - Méthode pour mesurer le facteur de transmission des vibrations par les matériaux résilients chargés par le système main-bras [in French]
Topics: exposure evaluation; hand-arm vibration; ISO; materials testing; standard; vibration damping materials; vibration measurement; vibration transmission.
International Organization for Standardization (ISO), Case postale 56, 1211 Genève 20, Switzerland, 1998. iii, 11p. 4 ref.
Health and Safety Executive
Reducing the risk of hand-arm vibration injury among stonemasons
Topics: construction work; data sheet; exposure evaluation; hand-arm vibration; medical supervision; selection of equipment; stone dressing; vibrating tools; vibration control.
HSE Books, P.O. Box 1999, Sudbury, Suffolk CO10 6FS, United Kingdom, Mar. 1998. 3p. 2 ref.
Acoustics and vibration - Laboratory measurement of vibro-acoustic transfer properties of resilient elements - Part 2: Dynamic stiffness of elastic supports for translatory motion - Direct method
Acoustique et vibrations - Mesurage en laboratoire des propriétés de transfert vibro-acoustique des éléments élastiques - Partie 2: Raideur dynamique en translation des supports élastiques - Méthode directe [in French]
Various types of passive vibration insulators are used to reduce the transmission of vibrations. Part 2 of this international standard specifies a method for determining transfer stiffness for translations of elastic supports, under specified preloads. The method (called the direct method) includes the laboratory measurement of vibrations on the input side and the blocking of output forces. It is applicable to elastic supports with parallel flanges. It covers the range of frequency from 1Hz up to a frequency f1, which is usually determined by the test rig. Part 1 (Principles and guidelines) was abstracted as CIS 00-524.
International Organization for Standardization (ISO), Case postale 56, 1211 Genève 20, Switzerland, 1st ed., 1997. iii, 18p. Illus. 7 ref. Price: CHF 85.00
Effects of whole-body vibrations on the standing human body and consequences for practical research and assessment from the point of view of labour science
Zur Wirkung von Ganzkörperschwingungen auf den stehenden Menschen und Konsequenzen für die Forschungs- und Beurteilungspraxis aus arbeitswissenschaftlicher Perspektive [in German]
Topics: Germany; human experiments; standing posture; vibration amplitude; vibration frequency; vibration intensity; vibration measurement; vibration testing; vibration transmission; whole-body vibration.
Universitätsverlag Dr. N. Brockmeyer, Uni-Tech-Center, Gebäude MC, 44799 Bochum, Germany, 1997. xi, 384p. Illus. approx. 370 ref. Price: DEM 49.80.
Acoustics and vibration - Laboratory measurement of vibro-acoustic transfer properties of resilient elements - Part 1: Principles and guidelines
Acoustique et vibrations - Mesurage en laboratoire des propriétés de transfert vibro-acoustique des éléments élastiques - Partie 1: Principes et lignes directrices [in French]
This International Standard describes the determination of vibro-acoustic transfer properties of resilient elements used to reduce the transmission of sound and vibrations from engines, appliances, structures etc. The present Part 1 serves as an introduction and a guide to parts 2 to 5 of ISO 10846, which describe laboratory measurement methods for the determination of the most important quantities governing transmission of vibrations through linear insulators. It provides the theoretical background, the principles and limitations of the methods and guidance to selection of the most appropriate standard of the series.
International Organization for Standardization (ISO), Case postale 56, 1211 Genève 20, Switzerland, 1st ed., 1997. iii, 20p. Illus. 16 ref.
Flodmark B.T., Lundborg G.
Vibrotactile sense and hand symptoms in blue collar workers in a manufacturing industry
Vibrotactile sense was determined in a group of blue collar workers exposed to vibration in rock crushing plants and in a control group of workers not exposed to vibration but subjected to heavy manual work. Clinical examinations were also performed. There was a clear relation between a lower vibrotactile sense and more pronounced sensorineural symptoms and between vibrotactile sense and the Stockholm workshop scale (sensorineural staging). Results indicate that tactilometry for the assessment of vibrotactile sense is a useful tool in assessing the severity of vibration induced neuromuscular symptoms and in verifying clinical complaints. Heavy manual work without exposure to vibration may contribute to the impairment of vibrotactile sense. Topics: epidemiologic study; grip strength; hand-arm vibration; heavy work; neuromuscular disorders; paraesthesia; stone crushing; vibration perception threshold.
Occupational and Environmental Medicine, Dec. 1997, Vol.54, No.12, p.880-887. Illus. 47 ref.
Palmer K.T., Coggon D.N.
Deficiencies of the Stockholm vascular grading scale for hand-arm vibration
An attempt was made to apply the Stockholm vascular grading scale for vibration white finger (VWF) to 92 cases of VWF. Case definition was based on clinical history and examination, and the 145 affected hands were graded under two alternative definitions of "frequent attacks". Depending on the choice of definition of frequent attacks, between 36% and 61% of the affected hands fell outside the scale and were unclassifiable. 30% of individual cases could not be classified under either definition and 28% altered their grading according to the definition. It was concluded that the Stockholm vascular scale does not encompass the full range of disease and that grading is highly sensitive to different interpretations of "frequent attacks". Alternative approaches to clinical grading are required. Topics: classification systems; evaluation of technique; hand-arm vibration; medical examinations; Raynaud's phenomenon; symptoms; vascular diseases.
Scandinavian Journal of Work, Environment and Health, Oct. 1997, Vol.23, No.6, p.435-439. Illus. 5 ref.
Mirbod S.M., Yoshida H., Jamali M., Masamura K., Inaba R., Iwata H.
Assessment of hand-arm vibration exposure among traffic police motorcyclists
Topics: dose-response relationship; epidemiologic study; exposure evaluation; hand-arm vibration; motorcycles; police forces; Raynaud's phenomenon; subjective assessment; upper extremity disorders; vibration measurement; work posture.
International Archives of Occupational and Environmental Health, 1997, Vol.70, No.1, p.22-28. Illus. 33 ref.
Zimmerman C.L., Cook T.M.
Effects of vibration frequency and postural changes on human responses to seated whole-body vibration exposure
Topics: backache; electromyography; human experiments; sitting posture; vibration acceleration; vibration frequency; vibration transmission; whole-body vibration.
International Archives of Occupational and Environmental Health, Mar. 1997, Vol.69, No.3, p.165-179. Illus. 56 ref.
Ogasawara C., Sakakibara H., Kondo T., Miyao M., Yamada S., Toyoshima H.
Longitudinal study on factors related to the course of vibration-induced white finger
Topics: evolution of disease; grip strength; hand-arm vibration; long-term study; nail press test; Raynaud's phenomenon; skin temperature; vibrating tools; vibration perception threshold.
International Archives of Occupational and Environmental Health, Mar. 1997, Vol.69, No.3, p.180-184. 25 ref.
Pelmear P.L., Wills M.
Impact vibration and hand-arm vibration syndrome
Topics: blanking presses; case study; diagnosis; hand-arm vibration; Raynaud's phenomenon; resistance welding; vibration disease.
Journal of Occupational and Environmental Medicine, Nov. 1997, Vol.39, No.11, p.1092-1096. 16 ref.
Topics: chain saws; comfort criteria; comment on standard; equipment testing; grinding machines; hand-arm vibration; pneumatic picks; selection of equipment; vibration frequency; vibration measurement; vibration protective gloves; vibration transmission.
Occupational Safety and Health, Aug. 1997, Vol.27, No.8, p.15-21. Illus.
Health and Safety Executive
High acceleration events in industrial exposure to whole-body vibration
Topics: acceleration; backache; buses; drivers; earthmoving equipment; fork-lift trucks; literature survey; lumbar column; report; tractors; United Kingdom; vehicle suspensions; vibration frequency; whole-body vibration.
HSE Books, P.O. Box 1999, Sudbury, Suffolk CO10 6FS, United Kingdom, 1997. 148p. Illus. Bibl.ref. Price: GBP 43.00.
Whole-body vibrations at workplaces of fork-lift truck drivers
Ganzkörperschwingungen an Arbeitsplätzen von Gabelstaplerfahrern [in German]
Topics: drivers seats; fork-lift trucks; Germany; health hazards; job study; standard; vibration measurement; whole-body vibration.
Hauptverband der gewerblichen Berufsgenossenschaften (HVBG), Alte Heerstrasse 111, 53754 Sankt Augustin, Germany, Dec. 1997. 92p. Illus. 16 ref.
Maeda S., et al.
A comparison of vibrotactile thresholds on the finger obtained with ISO type equipment and Japanese equipment
A vibrotactile threshold measurement system based on specifications of the International Organization for Standardization (draft standard ISO/CD 13091) was compared with a system currently used in Japan. Measurements were carried out on ten subjects under conditions similar to those outlined in the draft standard. Vibrotactile thresholds measured with the Japanese equipment were higher than those measured with the ISO equipment. In addition, the ISO equipment showed greater repeatability of results. Vibrotactile threshold determinations should take into account the experimental conditions (vibration frequency, area of contact, contact force, push force, and finger temperature).
Industrial Health, July 1997, Vol.35, No.3, p.343-352. Illus. 28 ref.
Tanaka M., et al.
Influence of local vibration on finger functions of forest workers
Finger functions were investigated in 92 male forest workers. Subjects were classified into one of two groups: group A showed normal results or a slight disorder, group B showed disorder or illness. Working hours per day and hours using a chain saw were lower in group A than group B. Mean hand grip strength and finger skin temperatures were higher in group A. Mean values of vibration sensation and reaction times in the nail pressure test were lower in group A. Differences in right and left hand finger functions are discussed along with age effects.
Industrial Health, July 1997, Vol.35, No.3, p.337-342. 15 ref.
These 20 chapters in a major new survey of OSH examine selected issues in occupational medicine: a forward looking approach to occupational medicine; how workplace chemicals enter the body; basic concepts of toxicology; epidemiology; prevention of musculoskeletal disorders; lung disorders; chemicals and hypersensitivity in the airways; allergy and other hypersensitivity; causes of occupational dermatoses; neurological diseases; occupational cancer; reproductive health; radiation injuries; health effects of noise exposure; vibration-induced disorders; carpal tunnel syndrome; stress-related illness; economic aspects of occupational health; health and safety in a multinational company; occupational databases and the Internet.
In: The Workplace (by Brune D. et al., eds), Scandinavian Science Publisher as, Bakkehaugveien 16, 0873 Oslo, Norway, 1997, Vol.1, p.745-977. Illus. Bibl.ref.
Health and Safety Executive
Vibration solutions - Practical ways to reduce the risk of hand-arm vibration injury
This guidance booklet presents a series of case studies which illustrate how companies in various industries have reduced the risk of hand-arm vibration injury. The studies are based on three types of control measures: reduction of exposure to vibration, maintaining blood circulation, and health surveillance. A checklist provides an approach to assessing potential vibration problems, and some vibration control techniques are outlined: process redesign; isolation; use of gloves; and use of suppliers' vibration data for new tools.
HSE Books, P.O. Box 1999, Sudbury, Suffolk CO10 6FS, United Kingdom, 1997. iv, 76p. Illus. 18 ref. Price: GBP 13.75.
Wasserman D.E., et al.
Whole-body vibration exposure and occupational work-hardening
This editorial briefly reviews epidemiologic studies on the association between whole-body vibration (WBV) and back disorders. It considers the use of simulated WBV exposure as part of a therapeutic "work hardening" rehabilitation process for back-injured workers, based on the premise that if workers practice a task, they can remind and retune the associated pool of motoneurons to perform it in a better manner. Occupational therapy treatments and approaches to motor-skill acquisition in the rehabilitation of physical dysfunction are discussed. The authors consider that there is no situation in which WBV exposure can be deemed to be therapeutic, and voice concern at its use as part of a therapeutic work hardening process.
Journal of Occupational and Environmental Medicine, May 1997, Vol.39, No.5, p.403-407. 56 ref.
Mistrot P., Donati P., Galmiche J.P.
Vibration exposure of operators in the vicinity of industrial machinery
Exposition vibratoire des opérateurs à proximité des machines industrielles [in French]
Whole-body mechanical vibration transmitted to machine operators was measured in the vicinity of 75 machines of 15 different types. Vibration levels in some cases exceeded the danger level (0.63m/s2). This happened in the case of crusher and forging hammer operators, whose controls are attached to the machines, near certain types of floor-mounted mechanical presses, and on the platforms of hot bituminous mix spreading machines. It would be advisable to apply anti-vibration measures to most of the machines studied, if this has not been done already, by suspending the machine itself, by carefully uncoupling it from the operator's platform or by isolating the control cabin from the vibrating parts. Particular attention is paid to the design of vibration isolation and to the information workers should be supplied with.
Cahiers de notes documentaires - Hygiène et sécurité du travail, 2nd Quarter 1997, No.167, Note No.2050-167-97, p.261-273. Illus. 18 ref.
Mechanical vibration and shock - Human exposure - Biodynamic coordinate systems
Vibrations et chocs mécaniques - Exposition de l'individu - Systèmes de coordonnées biodynamiques [in French]
This international standard specifies anatomical and basicentric coordinate systems for biodynamical measurements, for reference purposes in cognate standards development, and for precisely describing human exposure to mechanical vibration and shock. The segmental anatomical coordinate systems defined in the standard for the head, root of the neck, pelvis and hand. General principles are stated for the establishment of corresponding anatomical coordinate systems for other skeletal body segments.
International Organization for Standardization, Case postale 56, 1211 Genève 20, Switzerland, 1997. iv, 14p. Illus. 26 ref.
Palmer K.T., Mason H.
Serum endothelin concentrations in workers exposed to vibration
To compare serum endothelin 1 (ET1) concentrations in people with vibration-induced white finger (VWF) with those of controls exposed to vibration, and unexposed (pure) controls, volunteers from a stonemasonry, two quarries and an insurance company in Britain were classified by questionnaire and clinical examination into cases, exposed controls and pure controls. Subjects provided venous blood specimens after a period of warm equilibration (baseline) and again after cold challenge. Serum concentrations of the 21 amino acid peptide endothelin ET1-21 were measured by radioimmunoassay. Baseline ET1-21 was lower in cases than in the control groups. Cold challenge provoked a rise in ET1-21 in all groups but larger and significant mean absolute and percentage rises were found in cases.
Occupational and Environmental Medicine, Feb. 1996, Vol.53, No.2, p.118-124. 28 ref.
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