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Arterial carbon dioxide partial pressure (P a CO 2) 4.7–6.0 kPa 35–45 mmHg [13] The carbon dioxide partial pressure (PaCO 2) is an indicator of CO 2 production and elimination: for a constant metabolic rate, the PaCO 2 is determined entirely by its elimination through ventilation. [14]
pCO2, pCO2, or is the partial pressure of carbon dioxide (CO 2), often used in reference to blood but also used in meteorology, climate science, oceanography, and limnology to describe the fractional pressure of CO 2 as a function of its concentration in gas or dissolved phases. The units of p CO 2 are mmHg, atm, torr, Pa, or any other standard ...
Carbon dioxide is a by-product of food metabolism and in high amounts has toxic effects including: dyspnea, acidosis and altered consciousness. [8] Arterial blood carbon dioxide tension. P a CO 2 – Partial pressure of carbon dioxide at sea level in arterial blood is between 35 mmHg and 45 mmHg. [9] Venous blood carbon dioxide tension
Blood samples for testing are taken from arterial blood by a radial artery puncture, and from venous blood by venipuncture. Samples of capillary blood are taken using a lancet and capillary action. Samples from capillaries from either the earlobe or the fingertip can be used to predict the arterial partial pressure of carbon dioxide, and the ...
Arterial blood. 95-100 (P a O 2) Venous blood. 40-50. Non-lung Capillaries. 20-40. The alveolar oxygen partial pressure is lower than the atmospheric O 2 partial pressure for two reasons. Firstly, as the air enters the lungs, it is humidified by the upper airway and thus the partial pressure of water vapour (47 mmHg) reduces the oxygen partial ...
Under most conditions, the partial pressure of carbon dioxide (PCO 2), or concentration of carbon dioxide, controls the respiratory rate. The peripheral chemoreceptors that detect changes in the levels of oxygen and carbon dioxide are located in the arterial aortic bodies and the carotid bodies. [2]
CSF alb = 30. CSF glu = 60. CSF/S alb = 7.5. CSF/S glu = 0.6. The Alveolar–arterial gradient (A- aO. 2, [1] or A–a gradient), is a measure of the difference between the alveolar concentration (A) of oxygen and the arterial (a) concentration of oxygen. It is a useful parameter for narrowing the differential diagnosis of hypoxemia.
Hypoxemia is usually defined in terms of reduced partial pressure of oxygen (mm Hg) in arterial blood, but also in terms of reduced content of oxygen (ml oxygen per dl blood) or percentage saturation of hemoglobin (the oxygen-binding protein within red blood cells) with oxygen, which is either found singly or in combination.