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PaO2Aka: pO2, Hypoxia, Hypoxemia

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  1. See Also
    1. Arterial Blood Gas
    2. ABG Interpretation
    3. A-a Gradient
  2. Causes: Hypoxia or Hypoxemia (PaO2 <70 to 80 mmHg)
    1. Respiratory Failure
      1. Pulmonary edema
      2. Pneumonia
      3. Asthma
      4. Chronic Obstructive Lung Disease (COPD)
      5. Pneumothorax
      6. Pulmonary Embolism
      7. Acute Respiratory Distress Syndrome
    2. Cardiogenic Shock
      1. Congestive Heart Failure
      2. Cardiomyopathy
      3. Pericardial Effusion (Cardiac Tamponade)
      4. Aortic Stenosis
      5. Mitral Stenosis
    3. Miscellaneous Causes
      1. Anemia
      2. Decreased FIO2 of inspired air (high altitude)
      3. Cyanide poisoning
  3. Symptoms
    1. Dyspnea
  4. Signs
    1. Cyanosis
    2. Tachycardia
    3. Tachypnea
    4. Mental status changes
      1. Acute: Altered Level of Consciousness
      2. Chronic: Fatigue, drowsy, inattentive
    5. Oxygen Saturation (O2 Sat) decreased
      1. Usually correlates with PaO2
        1. However, relationship is not linear (See O2 Sat)
        2. Not sensitive for increased A-a Gradient
      2. Conditions where O2 Sat low despite normal PaO2
        1. Carbon Monoxide Poisoning
        2. Methemoglobinemia or other abnormal Hemoglobin
  5. Evaluation and Management
    1. See Dyspnea
    2. See Respiratory Failure

Hypoxia (C0242184)

Definition (CSP)reduction of oxygen supply to tissue below physiological level.
Definition (NCI)Having too little oxygen.
Definition (NCI)Having too little oxygen.
Definition (NCI)Status of decreased oxygen in inspired gases, arterial blood, or tissues. -- 2003
ConceptsPathologic Function (T046)
MSHD000860
EnglishDecreased oxygen supply, DEFIC OXYGEN, Hypoxia, Hypoxias, Hypoxic, OXYGEN DEFIC, Oxygen Deficiencies, Oxygen Deficiency
Spanishaporte de oxigeno disminuido, hipoxia
Parent Conceptsphysical symptom (C0679309), Signs and Symptoms (C0037088), Physical findings (C0311392), Oxygen Disorders (C0549562), Respiratory System Disorders, General, Functional and NEC (C0549576), PULMONARY DISORDERS: GENERAL (C0549657), Conceptual Entity (C1254372), Other Finding (C1335151), Hematological Disease (C0018939), Pathologic Processes (C0030660), Respiration Disorders (C0035204), Disorder of blood gas (C0342965), Ambiguous concept (C1274012)
SourcesAOD, COSTAR, CSP, CST, DXP, MSH, MTH, NCI, NDFRT, OMIM, SCTSPA, SNOMEDCT
Derived from the NIH UMLS (Unified Medical Language System)


O2 PARTIAL PRESSURE measurement (C0483414)

ConceptsLaboratory Procedure (T059)
EnglishO2 PARTIAL PRESSURE measurement, PO2
SourcesMTH
Derived from the NIH UMLS (Unified Medical Language System)


Hypoxemia (C0700292)

ConceptsFinding (T033)
ICD9799.02
MSHD000860
EnglishArterial hypoxaemia, Arterial hypoxemia, Hypoxaemia, Hypoxemia, Hypoxemias
Spanishhipoxemia
Parent Conceptsphysical symptom (C0679309), Asphyxia and hypoxemia (C1561822), Asphyxia (C0004044), Cardiovascular Diseases (C0007222), Respiration Disorders (C0035204), Disorder of blood gas (C0342965), Ambiguous concept (C1274012)
SourcesAOD, CST, DXP, ICD9CM, MSH, MTH, OMIM, SCTSPA, SNOMEDCT
Derived from the NIH UMLS (Unified Medical Language System)



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