Xem 1-4 trên 4 kết quả Hyperventilation
  • If the complaint is of dizziness establish if it is vestibular—vertigo, episodic, precipitated by change in position, associated nausea, vomiting, deafness or tinnitus—or non-vestibular—‘light headed’, constant, associated with hyperventilation, palpitations, syncope, sweating, pallor, headache. Examine the nervous and cardiovascular systems carefully. Look at the tympanic membranes. Check for orthostatic hypotension. Vestibular causes 2 Labyrinthitis. 2 Meniere’s disease. 2 Acoustic neuroma or other cerebello-pontine angle tumour.

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  • In this second edition of Veterinary Emergency Medicine Secrets we have updated the chapters from the first edition and added some new chapters based on new interests and involvement of emergency veterinarians. This question-and-answer format continues to be a useful means of offering information about veterinary emergency medicine. The stimuli for new questions and answers have come from readers of the first edition, students in the arena of emergency and critical care medicine, veterinary nurses and technicians, and chapter authors.

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  • Chronic respiratory alkalosis is the most common acid-base disturbance in critically ill patients and, when severe, portends a poor prognosis. Many cardiopulmonary disorders manifest respiratory alkalosis in their early to intermediate stages, and the finding of normocapnia and hypoxemia in a patient with hyperventilation may herald the onset of rapid respiratory failure and should prompt an assessment to determine if the patient is becoming fatigued. Respiratory alkalosis is common during mechanical ventilation. The hyperventilation syndrome may be disabling.

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  • Differential Diagnosis CENTRAL CYANOSIS (Table 35-1) Decreased SaO2 results from a marked reduction in the Pa O2. This reduction may be brought about by a decline in the FIO2 without sufficient compensatory alveolar hyperventilation to maintain alveolar PO2. Cyanosis usually becomes manifest in an ascent to an altitude of 4000 m (13,000 ft).

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