Hyperventilation
Mostrando 13-24 de 168 artigos, teses e dissertações.
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13. Análise hemogasométrica arterial e venosa de ovinos submetidos à transposição carotídea e indução de desequilíbrios ácido-básicos
With the purpose of comparing the parameters of arterial and venous blood gases during inhalational anesthesia with isoflurane in acid-base induced imbalances, 6 sheep Santa Inês were used. To facilitate the serial collection of blood they were prior submitted to carotid transposition technique used by Sweeney and Constantinescu (1992) in horses. We evaluat
Publicado em: 2009
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14. Repercussion of brief hyperventilation manuever on the cerebral and systemic hemodynamic and gasometric parameters in mechanically ventilated patients
Arquivos de Neuro-Psiquiatria. Publicado em: 2006-06
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15. REPERCUSSÃO DA MANOBRA DE HIPERVENTILAÇÃO BREVE SOBRE A HEMODINÂMICA CEREBRAL, SISTÊMICA E ALTERAÇÕES GASOMÉTRICAS EM PACIENTES SOB ASSISTÊNCIA VENTILATÓRIA MECÂNICA / Repercussion of Brief Hyperventilation Manuever on the Cerebral and Systemic Hemodynamic and Gasometric Parameters in Mechanically Ventilated Patients
Measurements of respiratory mechanics, very important to conduct the patient with mechanical ventilation, are obtained with the relaxation of respiratory muscle in sedated or paralyzed patients or through a brief period of hyperventilation (HV), which is possible to decrease the drive ventilation of patient. However, its known that the hyperventilation decre
Publicado em: 2006
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16. REPERCUSSÃO DA MANOBRA DE HIPERVENTILAÇÃO BREVE SOBRE A HEMODINÂMICA CEREBRAL, SISTÊMICA E ALTERAÇÕES GASOMÉTRICAS EM PACIENTES SOB ASSISTÊNCIA VENTILATÓRIA MECÂNICA / Repercussion of Brief Hyperventilation Manuever on the Cerebral and Systemic Hemodynamic and Gasometric Parameters in Mechanically Ventilated Patients
Cálculos da mecânica respiratória, tão importantes para a condução do paciente sob ventilação mecânica (VM), são obtidos com o relaxamento da musculatura respiratória através de sedação, curarização ou breve período de hiperventilação (HV), em que é possível diminuir o drive ventilatório do paciente. Porém, sabe-se que a HV reduz a pre
Publicado em: 2006
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17. Glutamatergic neurotransmission modulates hypoxia-induced hyperventilation but not anapyrexia
The interaction between pulmonary ventilation (V E) and body temperature (Tb) is essential for O2 delivery to match metabolic rate under varying states of metabolic demand. Hypoxia causes hyperventilation and anapyrexia (a regulated drop in Tb), but the neurotransmitters responsible for this interaction are not well known. Since L-glutamate is released centr
Brazilian Journal of Medical and Biological Research. Publicado em: 2004-10
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18. Clinical features of panic patients sensitive to hyperventilation or breath-holding methods for inducing panic attacks
Our aim was to compare the clinical features of panic disorder (PD) patients sensitive to hyperventilation or breath-holding methods of inducing panic attacks. Eighty-five PD patients were submitted to both a hyperventilation challenge test and a breath-holding test. They were asked to hyperventilate (30 breaths/min) for 4 min and a week later to hold their
Brazilian Journal of Medical and Biological Research. Publicado em: 2004-02
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19. Avaliação do transporte de oxigenio e da concentração do 2,3-DPG em pacientes com traumatismo craniencefalico grave submetidos ao controle da hipertensão intracraniana por um protocolo de ventilização otimizada
Optimized ventilation is a therapeutic modality for severe traumatic brain injury. Essentially, alveolar ventilation is adjusted to optimal levels in order to keep intracranial pressure below 20mmHg and cerebral oxygen extraction (CEO2) within recommended limits (24 to 42%). Determination of CEO2 is based on blood oxygen saturation. Hemoglobin oxygen saturat
Publicado em: 2003
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20. Hyperventilation in panic disorder patients and healthy first-degree relatives
Our aim was to observe the induction of panic attacks by a hyperventilation challenge test in panic disorder patients (DSM-IV) and their healthy first-degree relatives. We randomly selected 25 panic disorder patients, 31 healthy first-degree relatives of probands with panic disorder and 26 normal volunteers with no family history of panic disorder. All patie
Brazilian Journal of Medical and Biological Research. Publicado em: 2000-11
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21. Hemometabolismo cerebral : variações na fase aguda do coma traumatico
Twenty-seven adult patients with severe acute brain trauma, presenting with 3 to 8 points on the Glasgow Coma Scale, were prospectively evaluated according to a cumulative protocol for the management of acute intracranial hypertension, where intracranial pressure (ICP) and cerebral extraction of oxigen (CEOz) were measured and managed as follows: ICP <20mmHg
Publicado em: 1996
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22. Comparison of airway reactivity induced by histamine, methacholine, and isocapnic hyperventilation in normal and asthmatic subjects.
In an investigation of a rapid screening test for airway reactivity using isocapnic hyperventilation with room air and cold air the results of this test were compared with the airway response to histamine and methacholine challenge. Twelve non-atopic, non-smoking normal subjects and 11 subjects with stable asthma who had an FEV1 above 74% of the predicted va
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23. Syndrome X and hyperventilation.
The cardiorespiratory responses to exercise and forced hyperventilation were measured in 17 unselected patients with syndrome X (angina, positive exercise test, normal coronary arteriogram, no other cardiovascular disease) and compared with those in 15 healthy subjects. Forced hyperventilation produced hypocapnia and metabolic alkalosis but no chest pain or
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24. Role of cooling and drying in hyperventilation induced asthma.
Respiratory heat loss has been proposed as a mechanism of exercise induced asthma. Whether the predominant stimulus is airway drying or cooling remains unclear. We have measured changes in FEV1 after isocapnic cold air hyperventilation (CAH) (-23.4 degrees (SD 0.43 degrees) C) and dry ambient air hyperventilation (AAH) (18.7 degrees (0.52 degrees)C) in seven