Loss of carbon dioxide sensitivity by the respiratory system in cats with activated brain GABAergic structures

1997 ◽  
Vol 123 (4) ◽  
pp. 331-336 ◽  
Author(s):  
I. A. Tarakanov
Keyword(s):  
Carbon Dioxide ◽  
Respiratory System ◽  
Carbon Dioxide Sensitivity

Menstrual Respiratory Changes and Symptoms

1980 ◽  
Vol 136 (5) ◽  
pp. 492-497 ◽  
Author(s):  
J. Damas-Mora ◽  
Lisa Davies ◽  
Wendy Taylor ◽  
F. A. Jenner
Keyword(s):  
Carbon Dioxide ◽  
Menstrual Cycle ◽  
Slow Wave ◽  
Respiratory System ◽  
Normal Subjects ◽  
Wave Activity ◽  
Slow Waves ◽  
Slow Wave Activity ◽  
Premenstrual Tension ◽  
Carbon Dioxide Sensitivity

SummaryThe duration of standardised overbreathing required to produce slow wave activity in the EEG during different phases of the menstrual cycle has been studied, and changes in carbon dioxide sensitivity of the respiratory system. Normal subjects developed slow waves more quickly and had more sensitive CO2 responses during the premenstrual/menstrual phases. This may be a factor contributing to premenstrual tension.

The Respiratory System: Physiology

2019 ◽  
Author(s):  
John Yerxa ◽  
Cory J Vatsaas ◽  
Suresh Agarwal
Keyword(s):  
Carbon Dioxide ◽  
Respiratory System ◽  
Oxidative Metabolism ◽  
The Body ◽  
Respiratory Physiology ◽  
Critically Ill Patient ◽  
Complete Understanding ◽  
Physiologic Mechanism ◽  
Acid Base Equilibrium ◽  
System Physiology

Respiratory system uses an elegant physiologic mechanism to support the metabolic demands of the body through oxygenation and ventilation. Oxygen must be absorbed and delivered to the tissues to sustain oxidative metabolism, whereas carbon dioxide must be expelled in a delicate balance to maintain an acid-base equilibrium. Complete understanding of oxygen content, delivery, consumption, and carbon dioxide elimination is essential as a provider caring for the critically ill patient. This review contains 13 figures and 25 references. Key Words: oxygenation, respiratory system, ventilation, gas exchange, haemoglobin, respiratory physiology, respiratory anatomy, oxidative metabolism, dead space.

СIRCADIAN RHYTHMS OF BLOOD GAS IN PATIENTS WITH CHRONIC OBSTRUCTIVE PULMONARY DISEASE

2016 ◽  
Vol 1 (60) ◽  
pp. 34-38
Author(s):  
Горячева ◽  
Svetlana Goryacheva ◽  
Приходько ◽  
Olga Prikhodko ◽  
Кострова ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Circadian Rhythm ◽  
Respiratory System ◽  
Carbon Dioxide Tension ◽  
Capillary Blood ◽  
Chronic Obstructive ◽  
Gas Composition ◽  
Blood Gas ◽  
Healthy Individuals ◽  
Partial Oxygen

Chronobiological aspects of blood gas composition in 24 patients with COPD were studied. To achieve this goal, the gas composition of the arterialized capillary blood simultaneously with the investigation of respiratory function was studied with an interval of 6 hours over 2 days. In healthy individuals and patients with mild COPD two types of gas composition of blood biorhythm – daytime and nighttime – were found. In patients with moderate, severe and very severe disease 3 types of biorhythm of partial oxygen and carbon dioxide tension – morning time, noontime and evening time were registered. In healthy individuals and patients with mild COPD gas composition of blood was characterized by significant degrees of freedom in relation to functioning of the respiratory system, which indicated the stored processes of adaptation to changing conditions of the external and internal environment. In patients with moderate, severe and very severe COPD at the moment of acrophase of circadian rhythm of lung function maximum partial oxygen pressure in the arterialized capillary blood was observed. During the batiphaze of circadian rhythm of the respiratory system the highest values of the partial carbon dioxide tension were revealed. Thus, it was found out that with the growth of the severity of the disease in patients with COPD abnormal rhythms of blood gas composition are registered; the dependence of circadian rhythm of blood gas composition on the functioning of the respiratory apparatus increases.

scholarly journals P132 Carbon dioxide sensitivity in patients with hyperventilation syndrome

Thorax ◽  
2010 ◽  
Vol 65 (Suppl 4) ◽  
pp. A134-A134
Author(s):  
K. A. Bazin ◽  
S. Moosavi ◽  
K. Murphy ◽  
A. Perkins ◽  
M. Hickson ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Hyperventilation Syndrome ◽  
Carbon Dioxide Sensitivity

Fluid Flow and Particle Dispersion in Acini During Asynchronous Ventilation

2008 ◽  
Author(s):  
Sudhaker Chhabra ◽  
Ajay K. Prasad
Keyword(s):  
Carbon Dioxide ◽  
Fluid Flow ◽  
Gas Exchange ◽  
Surface Area ◽  
Opposite Direction ◽  
Respiratory System ◽  
Human Lung ◽  
Alveolar Epithelium ◽  
Particle Dispersion ◽  
Conducting Airways

The human lung comprises 24 generations of dichotomously branching tubes known as bronchi [1]. Functionally, these generations can be categorized as: (1) conducting airways which are non-alveolated and comprise the first 16 generations, and (2) the acini which consist of flexible, alveolated airways and are responsible for gas exchange. The alveoli are the most important units of the human respiratory system and provide large surface area (about 70–80 m2) for efficient gas exchange; oxygen diffuses into the blood through the alveolar epithelium, whereas carbon dioxide diffuses in the opposite direction from the blood to the lung.

ICU treatment of respiratory failure

2018 ◽  
Author(s):  
Matt Wise ◽  
Paul Frost
Keyword(s):  
Carbon Dioxide ◽  
Respiratory Failure ◽  
Gas Exchange ◽  
Motor Neuron ◽  
Motor Neuron Disease ◽  
Respiratory System ◽  
Acute Asthma ◽  
Compensatory Mechanisms ◽  
Asthma Attack ◽  
Icu Treatment

Respiratory failure is a syndrome characterized by defective gas exchange due to inadequate function of the respiratory system. There is a failure to oxygenate blood (hypoxaemia) and/or eliminate carbon dioxide (hypercapnoea). Respiratory failure can develop over years when it is due to conditions such as kyphoscoliosis or motor neuron disease, or minutes in the case of an acute asthma attack or pneumothorax. In this context, respiratory failure is often called acute (e.g. asthma), chronic (e.g. kyphoscoliosis), or acute on chronic (kyphoscoliosis complicated by pneumonia). Chronic respiratory failure is characterized by compensatory mechanisms which aim to adjust the pH of the blood back to the normal physiological range and involve the retention of bicarbonate by the kidney. This topic covers the etiology of respiratory failure as well as signs, symptoms, diagnosis, investigations, prognosis, and treatment.

The Physiology of Carbon Dioxide Transport in Insect Blood

1950 ◽  
Vol 27 (2) ◽  
pp. 184-191 ◽  
Author(s):  
L. LEVENBOOK
Keyword(s):  
Carbon Dioxide ◽  
Carbonic Anhydrase ◽  
Respiratory System ◽  
Buffer Capacity ◽  
Carbon Dioxide Transport ◽  
Capacity Curves ◽  
Titration Data

1. From titration data it has been calculated that the buffer capacity β for normal Gastrophilus blood at pH 6.8 is 0.0225, for dialysed blood 0.014 and for blood to which carbonic anhydrase has been added, 0.033. The buffer capacity curves are all more or less U-shaped. 2. The contribution towards the total buffer capacity of various buffering substances, of which protein and bicarbonate are the most important, has been quantitatively determined. 3. It is tentatively suggested that the reason why insect blood is better buffered on either side of its normal pH instead of the reverse as in other animals, may be related to the inefficiency of the tracheal respiratory system in eliminating excess CO2.

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