Yawning redirects here. For the fish species, see Yawning (fish) . A yawn is a reflex consisting of the simultaneous inhalation of air and the stretching of the eardrums, followed by an exhalation of breath.Yawning (oscitation) most often occurs in adults immediately before and after sleep, during tedious activities and as a result of its contagious quality. yawn is a reflex consisting of the simultaneous inhalation of air and the stretching of the eardrums, followed by an exhalation of breath. Yawning (oscitation) most often occurs in adults immediately before and after sleep, during tedious activities and as a result of its contagious quality.
A radiological emergency is an emergency in which there is, or is perceived to be, a hazard due to radiation exposure from a source. As sources of radiation are used in various fields, including industry, medicine and research, radiological emergencies may occur anywhere. These are examples of radiological emergency situations and associated conditions that a first responder may face: 1  Medical Symptoms of Radiation Exposure. 2  Loss or Theft of Dangerous Radioactive Source. 3  Public Radioactive Contamination/Exposure.
Cardiovascular emergencies are life-threatening disorders that must be recognized immediately to avoid delay in treatment and to minimize morbidity and mortality. Patients may present with severe hypertension, chest pain, dysrhythmia, or cardiopulmonary arrest. hypertensive emergency is an acute, severe elevation in blood pressure accompanied by end-organ compromise. It is usually associated with a systolic blood pressure (SBP) equal to or higher than 180 mm Hg and/or a diastolic blood pressure (DBP) equal to or higher than 120 mm Hg.