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We report two patients who suffered from acid burns while working in chemical factories. Case 1: a 44-year-old man who received burn induced by nitric acid on the face and extremities. Despite his protecting facial mask, he was exposed to nitric acid on his face through a gap between the mask and skin surface. Nitric acid was also sprinkled on his scalp which was not covered by a helmet or a protecting device. In addition, he suffered from acid burn on the right scapular region, the right upper arm, and the lower extremities through the work clothes. Case 2: a 26-year-old man who suffered from sulfuric acid burn on the forearms. Both patients were accidentally exposed to acids while they filled tanks with the acids through a hose. Following the manual of the factories, they washed the exposed skin with water for more than 15 minutes after the exposure. Although they recovered without any serious sequel, there remained partial deep tissue destruction of the skin. We reviewed these two cases from the aspect of industrial medicine, and proposed the following three points for improvement in the workplace to prevent accidental acid burns. 1) re-education or enlightenment activities for the well-experienced workers to avoid negligence to the danger of strong acid. 2) recommendation to take a complete shower to avoid overlooking of unaware acid injury. 3) improvement in the protecting facial mask. In addition, clinicians who examine acid-burn patients should not pass over the presence of deep ulcers lying behind the thick crust on the injured area.

Occupationally Induced Nitric Acid and Sulfuric Acid Burns: An Analysis of 2 Patients from the Aspect of Occupational Health