Some standard content:
ICS 13.100
National Occupational Health Standard of the People's Republic of China GBZ20—2002
Diagnostic Criteria of Occupational Contact Dermatitis
Diagnostic Criteria of Occupational Contact Dermatitis2002-04-08 Issued
Ministry of Health of the People's Republic of China
Implementation on 2002-06-01
Article 4.1 of this standard is recommended, and the rest are mandatory. This standard is formulated in accordance with the "Law of the People's Republic of China on the Prevention and Control of Occupational Diseases". From the date of implementation of this standard, if the original standard GB7806-1987 is inconsistent with this standard, this standard shall prevail. Occupational contact dermatitis is mainly caused by chemical factors. This type of skin disease has a high incidence rate, many types of pathogens, and involves a wide range of industries. It ranks first among occupational skin diseases. This standard is formulated to protect the health of contacts and effectively prevent and control occupational skin diseases.
Appendix A of this standard is an informative appendix, and Appendix B and C are normative appendices. This standard is proposed and managed by the Ministry of Health of the People's Republic of China. This standard was drafted by the Institute of Occupational Health and Poison Control of the Chinese Center for Disease Control and Prevention, Shanghai Dermatology and Venereology Hospital, Shanghai Second Medical University, Shandong Institute of Labor Hygiene, and Changchun Second Hospital. This standard is interpreted by the Ministry of Health of the People's Republic of China. ..comDiagnostic criteria for occupational contact dermatitis
GBZ20-2002
Occupational contact dermatitis refers to acute and chronic inflammatory changes in the skin caused by direct or indirect contact with occupational harmful factors with irritation and (or) sensitization in the labor or working environment. 1 Scope
This standard specifies the diagnostic criteria and treatment principles for occupational contact dermatitis. This standard applies to the diagnosis and treatment of occupational contact dermatitis. 2 Diagnostic principles
Based on a clear history of occupational contact, the site of onset, clinical manifestations and dynamic observation; refer to the investigation of the working environment and the incidence of the same type of work; when necessary, combine with skin patch tests for comprehensive analysis, and diagnose contact dermatitis caused by non-occupational factors.
3 Diagnostic criteria
3.1 Occupational irritant contact dermatitis
Acute dermatitis presents erythema, edema, papules, or papules, blisters or bullae densely covered on the basis of edema erythema, and erosion, exudation, and crusting after the blisters break. Conscious pain or itching. Chronic changes present varying degrees of infiltration, thickening, desquamation or wrinkling. Those with the following conditions can be diagnosed: 3.1.1 Have a clear history of occupational contact.
The time required from contact to onset and the degree of reaction are closely related to the nature, concentration, temperature, contact method and time of the irritant. Contact with high-concentration strong irritants often causes skin lesions immediately. 3.1.3 Under the same conditions, most contacts will develop the disease. 3.1.4 The skin lesions are confined to the contact site and have clear boundaries. 3.1.5 The course of the disease is self-limiting and can be easily cured after the cause is removed. It may recur after further contact. 3.2 The skin lesions of occupational allergic contact dermatitis are similar to those of irritant contact dermatitis, but bullae are rare and often present as eczema. Conscious itching. The following conditions can be diagnosed:
3.2.1 There is a clear history of occupational contact.
3.2.2 The disease does not occur after the first contact. Generally, it takes about 5 to 14 days or longer to become sensitized. After sensitization, the disease often occurs within 24 hours after further contact. The degree of reaction is related to the sensitization intensity of the allergen and the individual's quality. 3.2.3 Under the same conditions, only a few people who come into contact will develop the disease. 3.2.4 The skin lesions first occur at the contact site, with clear or unclear boundaries, and can spread to the surrounding and distant sites. In severe cases, they can spread throughout the body.
3.2.5 The course of the disease may be prolonged, and further contact with a small amount can cause recurrence. Skin patch tests with allergens often give positive results. 3.2.6
Treatment principles
Treatment principles
Remove pathogens remaining on the skin in a timely manner. Temporarily avoid contact with pathogens and other factors that aggravate the condition. 4.1.3
Symptomatic treatment according to the treatment principles of general contact dermatitis. 4.2 Other treatments
4.2.1 Occupational irritant contact dermatitis can be restored to work after recovery. Improving working conditions, strengthening personal protection, and maintaining good personal and environmental hygiene can prevent recurrence of dermatitis. 4.2.2 Occupational allergic contact dermatitis, repeated onset, long-term lack of improvement, and affecting workers, can change jobs and leave the environment with allergens.
4.2.3 During the treatment of acute dermatitis, a short-term rest or temporary job change can be considered appropriate. Instructions for the correct use of this standard
See Appendix A (Informative Appendix), Appendix B, and Appendix C (Normative Appendix). ..comAppendix A
(Informative Appendix)
Instructions for the correct use of this standard
A.1 Occupational contact dermatitis should be differentiated from skin diseases such as contact dermatitis, eczema, seborrheic dermatitis, and occupational photosensitivity dermatitis caused by various non-occupational factors. A.2 Occupational contact dermatitis currently lacks specific auxiliary examination indicators, and diagnosis mainly relies on clinical data. When the occupational history is clear, there is a close causal relationship between occupational contact and the occurrence and development of skin lesions, and contact dermatitis and other diseases caused by non-occupational factors can be excluded, it should be diagnosed. A.3 When inquiring about occupational history and conducting on-site investigations, attention should be paid to changes in contact materials, contact doses, and contact methods, production environment hygiene (including production facilities and layout, ventilation and exhaust, dust removal, workshop temperature and humidity, etc.), labor protection, personal hygiene, individual specificity and seasonal factors, etc., which affect the occurrence and development of this disease. A.4 Skin patch test is one of the important methods for detecting allergic contact dermatitis. It is applicable to occupational allergic contact dermatitis, but not to irritant dermatitis. During the operation, attention should be paid to the concentration of the patch test substance, the appropriate excipient and the appropriate patch test time should be selected, and the patch test results should be correctly evaluated. A.5 Occupational contact dermatitis is divided into two types: irritant and allergic. They should be separated as much as possible during diagnosis to facilitate the identification of labor capacity. However, some pathogens have both irritant and sensitizer effects. When it is difficult to classify clinically or the two effects exist at the same time, occupational contact dermatitis can be diagnosed and treated as occupational allergic contact dermatitis. A.6 Some chemicals may cause contact dermatitis and may also be absorbed through the skin to cause poisoning. Attention should be paid to Appendix Bwww.bzxz.net
(Normative Appendix)
Skin patch test method
See GBZ18.
Pathogens mainly caused by irritation
Pathogens mainly caused by allergic reactions
Appendix C
(Normative Appendix)
Appendix B
Common causative agents of occupational contact dermatitis (supplement)
Dehydrating agents
Oxidants
Protein precipitates
Keratin degrading agents
Degreasing agents
Metals and their salts
Rubber components
Strong acids, strong bases, etc.
Chromic acid and its salts, free iodine, bromine, hypochlorite, persulfate, nitrate, etc.
Acids, submetallic salts, etc.
Salicylic acid, chloranil, pyrochlore, etc.
Alcohol, ether, chloranil, trichloroethylene, etc.
Pesticides, herbicides, insecticides, soaps, synthetic detergents Cleaners, soldering flux, depilatory agents, lubricants, hexavalent chromates, nickel salts, cobalt salts, mercury salts, lacquers, epoxy resins: phenolic resins, urea-formaldehyde resins, melamine formaldehyde resins, etc.
Azofluorinated dyes, aniline dyes, disperse dyes, mercaptophenylthiazoles, amino formic acid, thiurams, naphthylamines, thiurams, diphenylguanidine, hydroquinone and its derivatives, etc.
Orange nut shell oil, extracts of certain flowers and plants, etc.
Soap additives, synthetic detergents, etc.
Methanaldehyde, citronellal, etc.
Two-skilled vocational education
General supplementary industry
This access is approved for use 3
You Meili
National energy products
Electric food 4
Formaldehyde, dinitrochlorobenzene, dinitrofluorinated benzene, amine curing agents, rosin, turpentine, photographic developers, etc.
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