๐ ็ธฝ็ฎ้ ๏ฝ ๐ ่ฑๆๅๆ๏ผๆฌ็ฏ๏ผ ๏ฝ ๐ ๅฎๆด็ฟป่ญฏ ๏ฝ โญ ็ฒพ่ฏ็ญ่จ
INTRODUCTION
Given the diverse occupations that people pursue, there are thousands of chemicals and other potentially noxious insults that can impinge on the skin in many different ways. Traditionally, the types of hazardous exposure are categorized as:
โmechanical โ friction, pressure, vibration, mechanical disruption
โchemical โ elements and chemical compounds (organic, inorganic, and proteins)
โphysical โ heat, cold, radiation (UV and ionizing)
โbiological โ organisms including viruses, bacteria, fungi, and parasites. The types of dermatoses induced by exposure to these noxious occupational hazards can be grouped as outlined in Table 16.1. This chapter differs from most of the others in that it deals with diverse conditions, many of which are also covered in detail in specific chapters.
Table 16.1 Clinical classification of occupational dermatoses.