Persing chap 1

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Author:
jbeaner77
ID:
248261
Filename:
Persing chap 1
Updated:
2013-11-21 13:25:08
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O2 Tanks
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Tank markings flow meters gauges
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  1. Cylinder factors:
    “H” cylinder =  
    “E” cylinder =
    • “H” cylinder = 3.14 L/ psig
    • “E” cylinder = 0.28 L/ psig
  2. Calculating how long cylinder contents will last:
    • Cylinder pressure x Cylinder factor
    • ----------------------------------------
    • flow rate
  3. How much O2 will a H and E tank hold?
    The “H” cylinder holds 244 cu ft (6900 L) of O2.

    The “E” cylinder, used for transport, holds 22 cu ft (622 L) of O2.
  4. How to calculate flow for liquid O2
    One liter of liquid oxygen weighs 2.5 lb (1.1 kg).

    multiply 344 x # of pounds
  5. Indications for O2 therapy
    • 1. Hypoxemia
    • 2. Labored breathing or dyspnea
    • 3. Increased myocardial work
  6. Signs and Symptoms of Hypoxemia
    • 1. Tachycardia
    • 2. Dyspnea
    • 3. Cyanosis (unless anemia is present)
    • 4. Impairment of special senses 5. Headache
    • 6. Mental disturbance
    • 7. Slight hyperventilation (tachypnea)
  7. Age (yr) Normal PaO2
    ≤ 60
     70
     80
    • 80 mm Hg
    • 70 mm Hg
    • 60 mm
  8. 4 types of Hypoxia
    • Hypoxemic hypoxia
    • Anemic Hypoxia
    • Stagnant circulatory hypoxia
    • Histotoxic Hypoxia
  9. Hypoxemic Hypoxia characteristics
    • Caused by lack of O2 in the blood
    • alveolar hypoventilation
    • diffusion defects 
    • v/q mismatch
    • right to left shunt
  10. what should be done for a patient who is hypoxic but is ventilating well (normal or low PaCO2)
    What is the exception?
    • Place patient on CPAP
    • if the question states that the patient has hypotension, a low cardiac output, or an elevated intracranial pressure level. Positive pressure should not be administered because the increased intrathoracic pressure. may worsen these conditions. Thus in these situations, increase the FiO2.
  11. Anemic Hypoxia
    • Decreased Hb levels
    • CO poisoning
    • Excessive blood loss
    • Methemoglobin
  12. Stagnant (circulatory) Hypoxia 

    characteristics and causes
    • The O2 content and carrying capacity is normal but capillary perfusion is diminished.
    •  (1) Decreased heart rate (2) Decreased cardiac output (3) Shock (4) Embolism
  13. Histotoxic anemia
    • The oxidative enzyme mechanism of the cell is impaired as a result of (O2 is there perfusion is good but cell unable to process the o2 and use)
    • (1) Cyanide poisoning (2) Alcohol poisoning
  14. Normal Inspiratory flow rate
    25-30 L/min
  15. Nasal Cannula flow rate and FiO2
    Delivers 24% to 40% O2 at flow rates of 1 to 5 L/ min (at about a 4% increase for every 1-L/ min increase).
  16. Simple O2 mask FiO2 and Liter flow
    • 35-50%
    • 5-10 L

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