Chronic hypercapnia
Chronic hypercapnia stimulates proximal bicarbonate reabsorption in the rat
... of chronic respiratory acidosis might be maintained by a reduction in filtration rate or an enhancement of tubular bicarbonate ...d. Chronic respiratory acidosis developed, with arterial pH ...nl/min). ...
7
Tolerance of chronic hypercapnia by the European eel Anguilla anguilla
... of chronic hypercapnia exhibited by the European eel is greater than has been described in any other teleost to date (Heisler, 1993; Larsen and Jensen, 1997) and is another example of the remarkable ...
10
<p>Prevalence Of Chronic Hypercapnia In Severe Chronic Obstructive Pulmonary Disease: Data From The HOmeVent Registry</p>
... of chronic hypercapnia development in stable severe ...of hypercapnia in patients with chronic stable ...and chronic hypercapnia, 23,25 and base excess was particularly relevant ...
8
The influence of graded degrees of chronic hypercapnia on the acute carbon dioxide titration curve
... with chronic hypercapnia of increasing severity, and the greater change in bicarbonate concentration which occurred during the acute CO 2 titration in the animals with more severe chronic ...
10
EFFECTS OF CHRONIC HYPERCAPNIA ON ELECTROLYTE AND ACID BASE EQUILIBRIUM III CHARACTERISTICS OF THE ADAPTIVE AND RECOVERY PROCESS AS EVALUATED BY PROVISION OF ALKALI
... This pattern of rise in plasma bicarbonate concentration is similar to that previously observed in animals on an alkali-free intake; since the animals in these earlier studies excreted a[r] ...
9
EFFECTS OF CHRONIC HYPERCAPNIA ON ELECTROLYTE AND ACID BASE EQUILIBRIUM II RECOVERY, WITH SPECIAL REFERENCE TO THE INFLUENCE OF CHLORIDE INTAKE
... In these two experiments, despite the almost complete absence of sodium from the diet, plasma bicarbonate 2 It should be noted, however, that on the first day in room air the fall in bic[r] ...
13
<p>Spontaneous-timed versus controlled noninvasive ventilation in chronic hypercapnia – a crossover trial</p>
... for chronic hypercapnic COPD patients there is common sense, that adequate (high) inspiratory driving pressures are needed to effec- tively reduce CO 2 28,29 and improve outcomes such ...
9
Afferent input modulates the chronic hypercapnia induced increase in respiratory related central pH/CO2 chemosensitivity in the cane toad (Bufo marinus)
... anaesthetised with MS222 as described above. Impedance leads, fabricated from thin insulated copper wire, were sutured to the flanks of the animal. Previous experiments from this laboratory have validated impedance ...
11
The Response of Extracellular Hydrogen Ion Concentration to Graded Degrees of Chronic Hypercapnia: The Physiologic Limits of the Defense of pH
... The data demonstrate that every increment of Pco2 induced a rise in renal acid excretion and a marked rise in plasma: bicarbonate concentration, but at no level of carbon dioxide tension[r] ...
12
The Effects of Chronic Hypoxemia on Electrolyte and Acid—Base Equilibrium: An Examination of Normocapneic Hypoxemia and of the Influence of Hypoxemia on the Adaptation to Chronic Hypercapnia
... During the second phase of observation we subjected the hypoxemic dogs to stepwise increments in arterial carbon dioxide tension in order to evaluate the effects of the low oxygen tension on the acid—base adjustments to ...
10
Chronic hypercapnia modulates respiratory related central pH/CO2 chemoreception in an amphibian, Bufo marinus
... acute hypercapnia in amphibians have been well studied, the effects of prolonged exposure to hypercapnia have not been ...to chronic hypoxia blunts the acute hypoxic ventilatory response but does not ...
12
EFFECTS OF CHRONIC HYPERCAPNIA ON ELECTROLYTE AND ACID BASE EQUILIBRIUM I ADAPTATION
... The response of the dog to exposure to a high CO2 atmosphere resembles that of the rat in that a large rise in plasma bicarbonate concentration is accompanied by an increase in the urina[r] ...
16
Hypo- and hypercapnia predict mortality in oxygen-dependent chronic obstructive pulmonary disease: a population-based prospective study
... Modest hypercapnia may reflect an adaptive alveolar hypoventilation, which occurs (uncon- sciously) to minimize dyspnea and respiratory muscle ...modest hypercapnia were not associated with earlier death, ...
6
Bench to bedside review: Permissive hypercapnia
... Buffering of the acidosis induced by hypercapnia in ARDS patients remains a common albeit controversial clinical practice [100,101] and was permitted in the ARDSnet study [2]. However, there are no long-term ...
9
Improvement in hypercapnia does not predict survival in COPD patients on chronic noninvasive ventilation
... Some findings of our study were surprising. First, patients with anxious or depressive feelings did not have a worse outcome. Physicians are often reluctant toward initiating these patients on NIV as in daily practice, ...
10
Ventilatory Patterns During Hypoxia, Hypercapnia, and Exercise in Adolescents With Mild Scoliosis
... Ventilatory Patterns During Hypoxia, Hypercapnia, and Exercise in Adolescents With. Services[r] ...
8
Relationship between Phosphaturia and Acute Hypercapnia in the Rat
... hypercapnia (HC) on urinary phosphorus excretion (U P V). HC as compared to normocapnia (NC) was associated with an increase in U P V in intact (62.5 vs. 7.93 µg/min) and TPTX (30.5 vs. 0.59 µg/min) rats, an ...
10
The Response of Cerebrospinal Fluid Composition to Sustained Hypercapnia
... The data demonstrate that under these conditions there is initially a marked dissociation between the rise in the bicarbonate concentration of plasma water and of spinal fluid, but that [r] ...
7
THE EFFECT OF PROGESTERONE ON THE RESPIRATION OF PATIENTS WITH EMPHYSEMA AND HYPERCAPNIA
... Since Daring and Heerhaber's studies were limited to single injections of progesterone, and because the effect of progesterone on respiration in the presence of hypercapnia was not known[r] ...
9
Sleep hypoventilation and daytime hypercapnia in stable chronic obstructive pulmonary disease
... sleep hypercapnia in patients with well- functioning respiratory pumps, as the retained CO 2 follow- ing an apnea/hypopnea will be exhaled during the next few ...
11