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treatment nursing management hysterectomy types lab investigations clinical features diagnosis fat embolism physical assessment surgeries investigations needed anesthesia risk assessment airway assesment anesthesia preanesthetic evaluation pac circulating nurse operation theatre nurses scrub nurse resuscitation icu shocks cardiology critical care 肠补谤诲颈辞惫别谤蝉颈贸苍 defibrillator sprains eye injury ear infections fractures diarrhea vomiting nose bleeds temperature reading hand washing cold cough primer for mothers children's basic illnesses