10.5 to 13.5 kilopascal
Normal Results Values at sea level: Partial pressure of oxygen (PaO2): 75 to 100 millimeters of mercury (mm Hg), or 10.5 to 13.5 kilopascal (kPa) Partial pressure of carbon dioxide (PaCO2): 38 to 42 mm Hg (5.1 to 5.6 kPa)
What are the normal parameters for a venous blood gas?
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 the difference in partial pressure of oxygen between arterial and venous blood?
PaO2 – Partial pressure of oxygen at sea level (160 mmHg in the atmosphere, 21% of standard atmospheric pressure of 760 mmHg) in arterial blood is between 75 mmHg and 100 mmHg. PvO2 – Oxygen tension in venous blood at sea level is between 30 mmHg and 40 mmHg.
How do you calculate oxygen arterial pressure?
The alveolar gas equation is of great help in calculating and closely estimating the partial pressure of oxygen inside the alveoli. The alveolar gas equation is used to calculate alveolar oxygen partial pressure: PAO2 = (Patm – PH2O) FiO2 – PACO2 / RQ.
What is kPa in oxygen?
The air we breathe Pressure can also be measured in kilos Pascal (kPa) – atmosphere is 101.3 kPa – or in centimetres of water (as when measuring central venous pressure). The atmosphere is made up of a mixture of gases, of which the most important physiologically is oxygen (O2).
What is kPa a measure of?
kilopascal (kPa), one thousand times the unit of pressure and stress in the metre-kilogram-second system (the International System of Units [SI]). One pascal is a pressure of one newton per square metre, or, in SI base units, one kilogram per metre per second squared.
What is normal venous PCO2?
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.
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 PO2 normal range?
The PaO2 measurement shows the oxygen pressure in the blood. Most healthy adults have a PaO2 within the normal range of 80–100 mmHg. If a PaO2 level is lower than 80 mmHg, it means that a person is not getting enough oxygen .
What is difference between spo2 and PaO2?
PaO2 values are always much lower than oxygen saturation values. This is simply a reflection of the oxygen saturation curve (figure above). For example, a saturation of 88% correlates to a PaO2 of ~55mm. We’re generally comfortable with a saturation of 88%, but a PaO2 of 55mm may cause concern.
What are the normal values of the arterial blood gases?
The normal values of the arterial blood gases (Please refer to the agreed norms from your lab); pH 7.35 – 7.45 PaCO2 35 – 45 mmHg PaO2 80 – 100 mmHg SaO2 %95 – 97 Standard HCO3 22 – 26 mEq/L Actual HCO3 22 – 26 mEq/L BE (Base excess) ±3 mmol/L
What is the normal range of pCO2 in central venous blood?
This indicates that if measured central venous p CO 2 is 5.0 kPa (38mmHg), then in 95 % of patients, arterial p CO 2 would lie within the range of 3.70-4.72 kPa (28-35 mmHg) with most close to 4.2 kPa (31mmHg).
What is the normal range of arterial and central venous pH?
For comparison, the study [23] showing the worst level of agreement, with 95 % LOA –0.03 to 0.09 indicates that for a measured central venous pH of 7.40 arterial pH would lie within the range of 7.37 to 7.49 for 95 % of patients, again with most close to 7.43. 187 adults medical and surgical ICU and cardiac catheteri -zation lab.
Can venous blood gas values differ with site of sampling?
Unlike arterial blood, which remains constant with regard to these values until it reaches the capillary bed of tissues, venous blood gas values can potentially differ to some extent with site of sampling. All clinical studies [11-28] investigating the validity of using venous blood for BGA share a simple and common design.
