How much PCO2 does venous blood have?

TABLE I: Arterial and venous blood gas reference range

Arterial Venous
pH 7.35-7.45 7.31-7.41
pCO2 (kPa) 4.7 – 6.0 5.5 – 6.8
pCO2 (mmHg) 35 -45 41 – 51
Bicarbonate (mmol/L) 22-28 23-29

What is pO2 in venous blood?

pO2: This is measured by a pO2 electrode. It is the partial pressure (tension) of oxygen in a gas phase in equilibrium with blood. High or low values indicate blood hyperoxia or hypoxia, respectively. pO2 in venous blood is lower than arterial blood due to oxygen extraction by peripheral tissues.

What is normal venous CO2?

23 to 29
The normal range is 23 to 29 milliequivalents per liter (mEq/L) or 23 to 29 millimoles per liter (mmol/L). Normal value ranges may vary slightly among different laboratories. Talk to your provider about the meaning of your specific test results.

How does venous CO2 compare to PCO2?

Venous PCO2 is 6 mmHg higher than arterial PCO2, but with wide variability; in general, difficult to predict arterial PCO2 from venous PCO2 (although a PCO2 can still be useful, as noted above).

Is pH lower in umbilical vein or artery?

The reference range for arterial cord blood pH is 7.12-7.35, and for arterial cord BD it is +9.3 to –1.5 mmol/L….Cord Blood Gases.

BG Parameter Umbilical Artery Umbilical Vein
pH 7.12 – 7.35 7.23 – 7.44
pO2 6.2 – 27.6 16.4 – 40.0
pCO2 41.9 – 73.5 28.8 – 53.3
Bicarbonate 18.8 – 28.2 17.2 – 25.6

How can you tell if blood is arterial or venous?

With venous bleeding, the blood runs out from the wound site at a steady rate. The color of the blood with venous bleeding is dark red to purplish in color. With arterial bleeding, the blood comes from the artery and pumps out with each heartbeat.

Why is venous CO2 low?

A low CO2 level can be a sign of several conditions, including: Kidney disease. Diabetic ketoacidosis, which happens when your body’s blood acid level goes up because it doesn’t have enough insulin to digest sugars. Metabolic acidosis, which means your body makes too much acid.

What is an unhealthy level of CO2?

400–1,000 ppm: typical level found in occupied spaces with good air exchange. 1,000–2,000 ppm: level associated with complaints of drowsiness and poor air. 2,000–5,000 ppm: level associated with headaches, sleepiness, and stagnant, stale, stuffy air.

What is the main difference between arterial and venous blood?

Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body. Veins are blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation.

Does pH refer to pO2 in blood?

Arterial blood gas analysis typically measures: pH (acidity) pCO2 (partial pressure of carbon dioxide) pO2 (partial pressure of oxygen)…ABG (Arterial Blood Gas)

pH 7.31–7.41
pO2 30–40 torr 4.0–5.3 kPa
CO2 23–30 mmol/L
Base excess/deficit ± 3 mEq/L ± 2 mmol/L
SO2 75%

What happens respiratory acidosis?

Respiratory acidosis is a condition that occurs when the lungs cannot remove all of the carbon dioxide the body produces. This causes body fluids, especially the blood, to become too acidic.

Is arterial or venous blood darker?

Arterial blood is the oxygenated blood in the circulatory system found in the pulmonary vein, the left chambers of the heart, and in the arteries. It is bright red in color, while venous blood is dark red in color (but looks purple through the translucent skin).

What causes high pCO2 levels?

The primary cause of high pCO2 levels is hypoventilation. Pneumonia, atelectasis , pneumothorax, pulmonary embolus, chest injury, central nervous system depression and failure of the respiratory muscles are among the many causes of hypoventilation .

What is the normal PaCO2 of venous blood?

Arterial partial pressure of carbon dioxide (PaCO2) This is the partial pressure of carbon dioxide in the arterial blood. It is the indicator of alveolar ventilation. Its normal value is 40 mmHg at sea level, while it is 46.5 mmHg in venous blood. Increased values show respiratory acidosis, while decreased values demonstrate respiratory alkalosis.

What does elevated PCO2 mean?

PO2 (partial pressure of oxygen) reflects the amount of oxygen gas dissolved in the blood. It primarily measures the effectiveness of the lungs in pulling oxygen into the blood stream from the atmosphere. Elevated pO2 levels are associated with: Increased oxygen levels in the inhaled air.

What is normal arterial PCO2 in KPA?

The partial pressure of carbon dioxide (PCO2) is the measure of carbon dioxide within arterial or venous blood. It often serves as a marker of sufficient alveolar ventilation within the lungs. Generally, under normal physiologic conditions, the value of PCO2 ranges between 35 to 45 mmHg, or 4.7 to 6.0 kPa .