hypoventilation/hypoxia

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Acute mountain sickness is related to nocturnal hypoxemia but not to hypoventilation.

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The purpose of the study was to investigate determinants of acute mountain sickness after rapid ascent to high altitude. A total of 21 climbers were studied ascending from <1,200 m to Capanna Regina Margherita, a hut in the Alps at 4,559 m, within <24 h. During their overnight stay at 4,559 m,

Detection of hypoventilation by capnography and its association with hypoxia in children undergoing sedation with ketamine.

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OBJECTIVE Hypopneic hypoventilation, a decrease in tidal volume without a change in respiratory rate, is not easily detected by standard monitoring practices during sedation but can be detected by capnography. Our goal was to determine the frequency of hypopneic hypoventilation and its association

[Clinical value of TS90% in evaluation of hypoxemia in patients with obstructive sleep apnea/hypoventilation syndrome].

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OBJECTIVE To explore the appropriate study how to properly evaluate the hypoxemia degree in patients with obstructive sleep apnea/hypoventilation syndrome (OSAHS). METHODS polysomnography was conducted on 108 OSAHS patients and 37 simple snorers to record the minimum oxygen saturation level (MiO(2))

Hypoxia following etorphine administration in goats (Capra hircus) results more from pulmonary hypertension than from hypoventilation.

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BACKGROUND Etorphine, a potent opioid agonist, causes pulmonary hypertension and respiratory depression. Whether etorphine-induced pulmonary hypertension negatively influences pulmonary gas exchange and exacerbates the effects of ventilator depression and the resultant hypoxemia is unknown. To

Idiopathic hypoventilation syndrome: importance of preventing nocturnal hypoxemia and hypercapnia.

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This report describes a young woman with unexplained chronic hypoventilation that was greatly exacerbated during sleep. Treatment with nocturnal O2 during a 2-yr period was associated with stable cardiovascular function but severe morning headaches and lethargy, presumably related to nightly bouts

Hypoventilation and hypoxia in reversal of cardiogenic shock in an infant with congenital heart disease.

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The case is presented of a child in cardiogenic shock in whom oxygen administration exacerbated a systemic to pulmonary shunt that caused a critical deterioration in his cardiovascular status requiring hypoventilation and restoration of baseline hypoxia for reversal.

Ventilatory responses to hypercapnia and hypoxia in relatives of patients with the obesity hypoventilation syndrome.

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BACKGROUND It is unclear why some morbidly obese individuals have waking alveolar hypoventilation while others with similar obesity do not. Some evidence suggests that patients with the obesity hypoventilation syndrome (OHS) may have a measurable premorbid impairment of ventilatory

Paradoxical worsening of hypoxemia in a patient treated by noninvasive positive pressure ventilation for obesity hypoventilation syndrome with concomitant obstructive sleep apnea: a case report.

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BACKGROUND Noninvasive positive pressure ventilation is frequently prescribed to obese patients with obstructive sleep apnea syndrome and obesity hypoventilation syndrome. However, mechanical ventilation with a positive end-expiratory pressure can induce or worsen a right-to-left shunt through a

Repeated-sprint training in hypoxia induced by voluntary hypoventilation improves running repeated-sprint ability in rugby players.

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OBJECTIVE The goal of this study was to determine the effects of repeated-sprint training in hypoxia induced by voluntary hypoventilation at low lung volume (VHL) on running repeated-sprint ability (RSA) in team-sport players. METHODS Twenty-one highly trained rugby players performed, over a 4-week

Physiological adaptations to repeated sprint training in hypoxia induced by voluntary hypoventilation at low lung volume.

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This study investigated the effects of repeated-sprint (RS) training in hypoxia induced by voluntary hypoventilation at low lung volume (RSH-VHL) on physiological adaptations, RS ability (RSA) and anaerobic performance.

METHODS

Over a 3-week period,

[Nocturnal hypoxia index: a new pulse oxymetry index of nocturnal hypoventilation in neuromuscular disorders].

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Respiratory insufficiency due to progressive muscle wasting is a major cause of death in various neuromuscular disorders. Morning headache and anorexia leading to slowly progressive body weight loss are frequently observed as initial symptoms of insufficient ventilation. From our experience

Relative contribution of intrinsic lung dysfunction and hypoventilation to hypoxemia during hemodialysis.

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Two mechanisms have been proposed to explain hemodialysis (HD)-induced hypoxemia: reversible lung damage due to intrapulmonary leukostasis as a consequence of the contact of blood with the dialyzer membrane, or alveolar hypoventilation due to the loss of carbon dioxide through the dialyzer. To

[Respiratory muscle hypotonia as one of the causes of hypoventilation and hypoxemia in patients with chronic renal failure treated by hemodialysis].

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In 21 patients with chronic renal failure spirometric and electromyographic (included m. pectoralis, m. rectus abdomini, m. obligus abdomini) examinations were performed before and after hemodialysis. We observed a decreased myoelectrical activity of muscles on the basis of amplitude of EMG.

Hypoxia reveals posterior thalamic, cerebellar, midbrain, and limbic deficits in congenital central hypoventilation syndrome.

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Congenital central hypoventilation syndrome (CCHS) patients show deficient respiratory and cardiac responses to hypoxia and hypercapnia, despite apparently intact arousal responses to hypercapnia and adequate respiratory motor mechanisms, thus providing a model to evaluate functioning of particular

Repeated-Sprint Training in Hypoxia Induced by Voluntary Hypoventilation in Swimming.

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OBJECTIVE Repeated-sprint training in hypoxia (RSH) has been shown as an efficient method for improving repeated-sprint ability (RSA) in team-sport players but has not been investigated in swimming. We assessed whether RSH with arterial desaturation induced by voluntary hypoventilation at low lung

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