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Hypoxic ventilatory response (HVR) is the increase in ventilation induced by hypoxia that allows the body to take in and transport lower concentrations of oxygen at higher rates. It is initially elevated in lowlanders who travel to high altitude, but reduces significantly over time as people acclimatize .
Many people with chronic obstructive pulmonary disease have a low partial pressure of oxygen in the blood and high partial pressure of carbon dioxide.Treatment with supplemental oxygen may improve their well-being; alternatively, in some this can lead to the adverse effect of elevating the carbon dioxide content in the blood (hypercapnia) to levels that may become toxic.
None of the plans were vegetarian, but the DASH plan incorporated more fruits and vegetables, low fat or non-fat dairy, beans, and nuts than the others studied. The DASH diet reduced systolic blood pressure by 6 mm Hg and diastolic blood pressure by 3 mm Hg in patients with high normal blood pressure (formerly called "pre-hypertension"). Those ...
A significant alteration in ventilation that affects elimination of CO 2 can cause a respiratory acid-base disorder. The PaCO 2 is maintained within a range of 35–45 mm Hg in normal states. [citation needed] Alveolar ventilation is under the control of the respiratory center, which is located in the pons and the medulla.
Hypoxic air systems can be integrated with the building management system and can include systems to recover the heat generated by the hypoxic air generator that, would otherwise be wasted. [ 5 ] Air with low oxygen concentration is transported to the protected volumes through dedicated pipes or, more simply, via an existing ventilation system .
While the maintenance of ventilation/perfusion ratio during regional obstruction of airflow is beneficial, HPV can be detrimental during global alveolar hypoxia which occurs with exposure to high altitude, where HPV causes a significant increase in total pulmonary vascular resistance, and pulmonary arterial pressure, potentially leading to ...
The control of ventilation is the physiological mechanisms involved in the control of breathing, which is the movement of air into and out of the lungs. Ventilation facilitates respiration. Respiration refers to the utilization of oxygen and balancing of carbon dioxide by the body as a whole, or by individual cells in cellular respiration. [1]
Hypoventilation is not synonymous with respiratory arrest, in which breathing ceases entirely and death occurs within minutes due to hypoxia and leads rapidly into complete anoxia, although both are medical emergencies. Hypoventilation can be considered a precursor to hypoxia, and its lethality is attributed to hypoxia with carbon dioxide toxicity.