Archive:Arterial blood gasses: Difference between revisions
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Sa O2 MUST be on room air (FiO2 = 0.21) | Sa O2 MUST be on room air (FiO2 = 0.21) | ||
==Hypoxemia - look @ pO2== | |||
*60-75 mild hypoxemia | *60-75 mild hypoxemia | ||
*45-59 moderate hypoexmia | *45-59 moderate hypoexmia | ||
*< 45 severe hypoexmia | *< 45 severe hypoexmia | ||
==pH== | |||
*Acidic pH < 7.35 | *Acidic pH < 7.35 | ||
*Basic pH > 7.35 | *Basic pH > 7.35 | ||
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*If pH is in the direction predicted by PaCO2 and BE is + or - then partially compensated respiratory disorder | *If pH is in the direction predicted by PaCO2 and BE is + or - then partially compensated respiratory disorder | ||
==pCO2== | |||
*Acidic > 45 | *Acidic > 45 | ||
**indicates hypoventillation | **indicates hypoventillation | ||
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**indicated hyperventillation | **indicated hyperventillation | ||
==HCO3== | |||
*Acidic > 26 | *Acidic > 26 | ||
*Basic < 24 | *Basic < 24 | ||
==Count the number of acid (A) vs. base (B)== | |||
*if pCO2 A/B matched pH A/B - respiratory | *if pCO2 A/B matched pH A/B - respiratory | ||
*if HCO3 A/B matches pH A/B - metabolic | *if HCO3 A/B matches pH A/B - metabolic | ||
==Compensation== | |||
If the change in PCO2 | If the change in PCO2 | ||
*increases by 10 - HCO3 increases by 1 - acute respiratory acidosis | *increases by 10 - HCO3 increases by 1 - acute respiratory acidosis | ||
Revision as of 23:21, 17 May 2007
Sa O2 MUST be on room air (FiO2 = 0.21)
Hypoxemia - look @ pO2
- 60-75 mild hypoxemia
- 45-59 moderate hypoexmia
- < 45 severe hypoexmia
pH
- Acidic pH < 7.35
- Basic pH > 7.35
- If the pH is not in the direction of the pCO2 then this is a metabolic disorder with respiratory compensation
- If the pH is NORMAL and the pCO2 is abdnormal, then this is a fully compensated respiratory disorder
- If pH is in the direction predicted by the paCO2 and the BE=0 (BE = base excess) then this is an uncompensated respiratory disorder
- If pH is in the direction predicted by PaCO2 and BE is + or - then partially compensated respiratory disorder
pCO2
- Acidic > 45
- indicates hypoventillation
- Basic < 35
- indicated hyperventillation
HCO3
- Acidic > 26
- Basic < 24
Count the number of acid (A) vs. base (B)
- if pCO2 A/B matched pH A/B - respiratory
- if HCO3 A/B matches pH A/B - metabolic
Compensation
If the change in PCO2
- increases by 10 - HCO3 increases by 1 - acute respiratory acidosis
- increases by 10 - HCO3 increases by 3-5 - chronic respiratory acidosis
- decreases by 10 - HCO3 decreases by 2 - acute respiratory alkylosis
- decreases by 10 - HCO3 decreases by 5 - chronic respiratory alkylosis
Other OSCE modules
Acute Confusion - Acute Coronary Syndrome Orders - Anemia - Arterial Blood Gasses - Asthma - Blood Pressure - Chest pain - Chest XRay - CHF - Coma - COPD - Cranial Nerves - Diabetic History - Diabetic Foot - Dysphagia - EKGs - Gallbladder and Liver - Liver Disease - Gait and Balance - Headache - Hematemesis - Hypertension - Jugular Venous Pulses - Knee Exam - Lymph Nodes - Community Acquired Pneumonia - Parkinson Disease - Peripheral Arterial Insufficiency - Pneumonia Examination - Precordial Exam - STD's - Spleen - Swollen Leg Exam - Thyroid Exam - Upper vs Lower Motor Neuron Lesions - Urinary Incontinence