Breath Holding Test
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Cerebral vasomotor reactivity assessment using Transcranial Doppler and MRI with apnea test
Differently from previous studies that used Transcranial Doppler (TCD) and functional MRI (fMRI) for cerebral vasomotor reactivity (CVR) assessment in patients with carotid stenosis (CS), we assessed CVR using an identical stimulus, the Breath-Holding Test (BHT). We included 15 patients with CS and 7 age-matched controls to verify whether fMRI responded diff
Braz J Med Biol Res. Publicado em: 24/10/2016
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2. Análise dos tempos de apneia voluntária máxima como teste de função pulmonar em pacientes com distúrbios ventilatórios obstrutivos e normais / Analysis of the maximal voluntary breath-holding time as pulmonary function tests in patients with obstructive ventilatory defects and normal controls
Introdução: O teste de apneia respiratória tem sido testado e demonstrou ser de utilidade clínica. Objetivos: Determinar o tempo de apneia voluntária máxima em pacientes com distúrbios ventilatórios obstrutivos (DVO) e em indivíduos normais e correlacionar os tempos de apneia com os testes de função pulmonar. Métodos: Foi realizado um estudo caso
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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3. Avaliação do valor prognóstico dos biomarcadores cardíacos perioperatórios em pacientes de moderado a alto risco cardiovascular submetidos à cirurgia não-cardíaca / Analysis of the maximal voluntary breath-holding time as pulmonary function tests in patients with obstructive ventilatory defects and normal controls
Introdução: O teste de apneia respiratória tem sido testado e demonstrou ser de utilidade clínica. Objetivos: Determinar o tempo de apneia voluntária máxima em pacientes com distúrbios ventilatórios obstrutivos (DVO) e em indivíduos normais e correlacionar os tempos de apneia com os testes de função pulmonar. Métodos: Foi realizado um estudo caso
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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4. Variações agudas da pressão intra-ocular durante o exercício resistido dinâmico em homens, jovens, ativos e saudáveis
AIM: To evaluate the effect of resisted exercise bench press on intraocular pressure (IOP). METHODS: Sixty eyes of 30 normal, male subjects were enrolled. Subjects performed four repetitions of bench press exercise in two different ways: in mode I, breathing was held in the last repetition, and in mode II, subjects exhaled normally in the last repetition. An
Publicado em: 2008
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5. 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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6. Evaluation of breath holding in hypercapnia as a simple clinical test of respiratory chemosensitivity.
Breath holding was used as the basis of a simple test of respiratory chemosensitivity. Breath holding was begun at selected degrees of hypercapnia produced by CO2 rebreathing. In 16 healthy control subjects there was a linear regression of the log of breath-holding time on the PCO2 at the start of breath holding. Breath-holding time (BHT) and the slope of a
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7. Correction of the single breath carbon monoxide transfer factor in exercise for variations in alveolar oxygen pressure.
BACKGROUND--Carbon monoxide transfer factor (TLCO) varies inversely with the partial pressure of alveolar oxygen (PAO2). During exercise the PAO2 in the alveolar gas sample bag decreases so the TLCO increases more than would be expected from the effects of exercise alone. The effects of PAO2 on the estimation of TLCO during exercise have been investigated an
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8. Standardisation of gas mixtures for estimating carbon monoxide transfer factor.
BACKGROUND--The American Thoracic Society recommends that the inspired concentration used for the estimation of carbon monoxide transfer factor (TLCO) mixture should be 0.25-0.35% carbon monoxide, 10-14% helium, 17-21% oxygen, balance nitrogen. Inspired oxygen influences alveolar oxygen and hence carbon monoxide uptake, such that transfer factor increases by
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9. Oxygen and 99mTc-MAA shunt estimations in patients with pulmonary arteriovenous malformations: effects of changes in posture and lung volume.
BACKGROUND--Patients with arteriovenous malformations are routinely monitored with arterial oxygen saturation (SaO2) estimations (breathing air) from which an oxygen shunt fraction can be calculated. This simple estimation has been compared with an anatomically defined estimate of the right to left shunt using a radioisotopic method. The fall in SaO2 which o