Arterial Blood Gases: Difference between revisions
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== Useful Resources == | == Useful Resources == | ||
[http://www.prognosis.org/abg/arterial_blood_gas_calculator.php ABG Calculator | [http://www.prognosis.org/abg/arterial_blood_gas_calculator.php ABG Calculator] | ||
[http://www.altitude.org/oxygen_levels.php ABG's at altitude] | |||
[https://sites.google.com/site/doctorkipp/ Acid-Base Questions] | |||
[http://www.adamw.org/med/apps/abg.cgi ABG Interpretation Quiz] | |||
== Associated Topics == | == Associated Topics == | ||
Revision as of 15:08, 17 June 2013
Original Editor - Scott Buxton
Top Contributors - Adam Vallely Farrell, Kim Jackson, Uchechukwu Chukwuemeka, Scott Buxton, Lucinda hampton, Rachael Lowe, Joao Costa, Admin, Laura Ritchie, Naomi O'Reilly, Abbey Wright, Angeliki Chorti and 127.0.0.1
Arterial Blood Gases[edit | edit source]
Arterial blood gases (ABG's) is a blood test which is used to give an indication of ventilation, gas exchange and acid-base status and is taken from an arterial blood supply[1]. It should be noted that it is not to be confused with venous blood gases which are used when arterial supply is not available or unreliable due to disease. The line in is usually interted in the radial artery located at the wrist but is also sometimes used in the femoral artery in the groin[1]. This is important to consider when moving and handling a patient as it is easy to catch a line on an obect or clothing and care needs to be taken.
Readings[edit | edit source]
| Arterial Blood Analysis | Reference Ranges | Venous Blood analysis | Reference Ranges |
|---|---|---|---|
| pH | 7.35 - 7.45 | pH | 7.31 - 7.41 |
| PaO2 |
10.7 - 13.3 kPa |
PO2 |
5.0 - 5.6 kPa |
| PaCO2 | 4.7 - 6.0 kPa | PCO2 | 5.6 - 6.7 kPa |
|
Bicarbonate (HCO3-) |
22 - 26 mmol/L | ||
| Base Excess | -2 to +2 |
Helpful guidelines[3]
1.A 1mmHg change in PaCO2 above or below 40 mmHg results in 0.008 unit change in pH in the opposite direction.
2.The PaCO2 will decrease by about 1 mmHg for every 1 mEq/L reduction in [HCO3-] below 24 mEq/L
3.A change in [HCO3-] of 10 mEq/L will result in a change in pH of approximately 0.15 pH units in the same direction.
Reading should always be read in reference to the patients previous ABG as you will then be able to assess a trend and make a more accurate assessment on whether you should treat or if your treatment has be successful or not.
Useful Resources[edit | edit source]
Associated Topics[edit | edit source]
- Oxygen Dissociation Cure
- Anemia
- Respiratory Failure Type 1 and 2
References
[edit | edit source]
- ↑ 1.0 1.1 Hough A. Physiotherapy in Respiratory Care. An evidence based-approach to respiratory and cardiac managemenmt. 3rd ed. Cheltenham: Nelson Thomas Ltd. 2001
- ↑ Kenyon K, Kenyon J. The Physiotherapist's Pocketbook. Essential Facts at your Fingertips. 2nd ed. London: Churchill Livingstone, Elsevier. 2009.
- ↑ Stoeltin RK, Miller RD. Basics of Anesthesia, 5th ed. Philadelphia: Churchill Livingstone, Elsevier. 2007.
