物理性有害因素高温异常气压英文版.pptVIP

* * （2）Muscles, joints, skeletal system Bubble formation in the muscles, joints, periosteum, etc., can cause pain. Joint pain is a common symptom. Long-term consequences: aseptic bone necrosis (Epiphyseal vessels nitrogen accumulation, resulting in ischemia) * * （3）nervous system Poor blood supply to the spinal cord, can produce paraplegia, limb sensory and motor dysfunction Brain: The corresponding symptoms * * （4）circulation system Gas embolism, cause cardiovascular dysfunction. Breakdown pulse, blood pressure↓, chest tightness, skin and mucous membrane cyanosis, extremities cold, etc. Lymphatic system involvement, resulting in local edema Involving the pulmonary vasculature, causing pulmonary embolism, pulmonary edema * * （5）other Omentum, mesentery and the gastric vessels in thrombosis, cause abdominal pain, nausea and vomiting. * * Diagnosis（GBZ24－2002） Acute decompres-sion sickness Decompres-sion of osteonecrosis Mild: skin manifestations Moderate: limbs, large joints and muscles near the bone and joint pain Severe: the nervous system, circulatory system or respiratory disorders X-ray changes-staging * * Treatment principle The only cure means is timely compression therapy to eliminate air bubbles. “Hospital is best to let the patient lie down process, let loose (as diving suits, etc.), the Ottomans height of about 20-30 cm, to avoid air bubbles clog the blood vessels or brain nervous system and danger.” * * Prevention Technological innovation Compliance with safety procedures: stage decompression Health care measures * * Low atmospheric pressure operation Altitude, mountains, high plains Plateau investigation, geological exploration, hiking and other * * Mountain sickness （1）Low pressure effects on the body Adaptive changes（acclimatization） Respiratory and circulatory system * * pulmonary ventilation volume↑HR↑ Atmospheric Partial pressure of oxygen(OPP) alveolar PO2 GEX↓Bound oxygen↓Release of oxygen↓ Lack of oxygen hypoxia Adaptation cardiac output↑ long-