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PH levels and Arterial Blood Gases. Blood pH  Normal levels of pH are 0-14  Below 6- acidic  Above 7-alkaline Use pH paper to determine acidity or.

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Presentation on theme: "PH levels and Arterial Blood Gases. Blood pH  Normal levels of pH are 0-14  Below 6- acidic  Above 7-alkaline Use pH paper to determine acidity or."— Presentation transcript:

1 pH levels and Arterial Blood Gases

2 Blood pH  Normal levels of pH are 0-14  Below 6- acidic  Above 7-alkaline Use pH paper to determine acidity or alkalinity These pH levels are used for chemicals, body fluids, such as urine, gastric content

3 Acids  Substances that when dissolved in water will ionize into positively charged hydrogen ions and negatively charged ions of some other element.

4 Alkali (Bases)  Substances that when dissolved in water ionizes into negatively charged hydroxide ions and positively charged ions of metal

5 Neutralization  This is the result when an acid and a base are combined to form a salt and a water.  Example: heartburn: give antacids and neutralizes the acid into a salt and a water and the heartburn goes away.

6 Arterial Blood  Arterial Blood gas testing measures the dissolved O2 and CO2 and pH levels in the arterial blood.

7 Arterial Blood gases  The ABG measure the effectiveness of tissue perfusion and when imbalanced several health conditions can occur.

8 pH  The pH reflects the hydrogen ions in the circulating blood.  This complex buffering system exists in the respiratory and cardiovascular mechanisms and keeps the systems in balance.

9 Respiratory  The lungs (respiratory) compensate for the imbalance within 2 to 3 hours.

10 Metabolic  The kidneys (metabolic) compensate for the imbalances within 2 to 3 days.

11 Health problems that will alter ABG results  Asthma  Pneumonia  Emphysema  Hypoxia  Sepsis (infection)  Shock  Anesthesia  Drug overdose (Aspirin toxicity)

12 Arterial Blood pH  This is a useful indicator to determine acid/base balance within the body.  Normal range is 7.35 to 7.45

13 Homeostasis  Intracellular- fluid within the cell  Extracellular-fluid outside the cell

14 Arterial blood gas (ABG)  Arterial samples provide information about the ability of the lungs to regulate acid/base balance through retention or release CO2. Effectiveness of the kidneys maintaining appropriate bicarbonate levels can also be gauged.

15 Application of ABG  pH 7.35 to 7.45  CO2- 35-45 (respiratory)  HCO3- 24-28 (metabolic)  O2 saturation- 80 to100

16 Look at pH first  pH:  Above 7.45- alkaline  Below 7.35- acid

17 respiratory  CO2 above 45-acid  Below 35 alkaline

18 metabolic  HCO3 above 28- alkaline  Below 24 acid

19 Example  24 year old female with drug overdose has following ABG results:  pH- 7.5  CO2-40  HCO3- 32  pH elevated, alkaline, HCO3 elevated and alkaline  Metabolic alkalosis


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