How do you interpret a blood gas analysis?

Interpreting an arterial blood gas (ABG) is a crucial skill for physicians, nurses, respiratory therapists, and other health care personnel. ABG interpretation is especially important in critically ill patients….Professionals.

Disorder Respiratory alkalosis
Primary problem ↓ in PaCO2
Compensation ↓ in [HCO3-]

What is a normal capillary blood gas?

The ‘gold standard’ sample for blood gas analysis is arterial blood obtained via an indwelling arterial catheter or by arterial puncture….ARTERIAL AND CAPILLARY BLOOD GAS pH, pCO2 & pO2 – STUDY FINDINGS.

Arterial Capillary
pH Hydrogen ion conc (mmol/L) 7.35-7.45 35-45 7.402 (mean only) 37-43

What does a capillary blood gas measure?

A blood gas test is used to measure how much oxygen and carbon dioxide are in your blood. It’s called a capillary blood gas test if the sample is collected from your earlobe, and an arterial blood gas test if it is taken from your wrist.

What is the easiest way to interpret an ABG?

The third step in our ABG interpretation is to look at the HCO3 level. A normal HCO3 level is 22-26 mEq/L. If the HCO3 is below 22, the patient is acidotic. If the HCO3 is above 26, the patient is alkalotic….6 Easy Steps to ABG Interpretation.

pH 7.35-7.45
Base Excess + or – 2

What is normal range of pO2 and PCO2?

ABG (Arterial Blood Gas)

pH 7.31–7.41
pCO2 41–51 torr 5.5–6.8 kPa
pO2 30–40 torr 4.0–5.3 kPa
CO2 23–30 mmol/L
Base excess/deficit ± 3 mEq/L ± 2 mmol/L

How do I read a VBG report?

How to Read a Venous Blood Gas (VBG) – Top 5 Tips

  1. 1) Assessment of oxygenation status. The pO2 on a VBG bears no relationship to the paO2.
  2. 2) Assessment of hypercarbia. In patients with COPD we need to detect the presence of CO2 retention.
  3. 3) Assessment of pH status.
  4. 4) Assessment of electrolyte levels.
  5. 5) Oximetry.

What is normal capillary PO2?

Blood gas and acid-base properties of blood have been known for decades, making it possible to account accurately for individual differences that may be encountered when studying patients. Measurements in nine normal subjects yielded a mean end-capillary PO2 value of 31.2 mm Hg.

What is CBG report?

Useful for evaluating oxygen and carbon dioxide gas exchange; respiratory function, including hypoxia; and acid/base balance. It is also useful in assessment of asthma; chronic obstructive pulmonary disease and other types of lung disease; embolism.

How do you tell if it is respiratory or metabolic acidosis?

Having determined if the patient is acidotic or alkalotic, check the HCO3– and the PaCO2 to classify the results as follows:

  1. Metabolic acidosis: patients who are acidotic and have a HCO3– <22 (base excess <–2);
  2. Respiratory acidosis: patients who are acidotic with a PaCO2 >6;

What is a good PO2 level?

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 happens when PO2 is high?

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.