Persing chap 1

• “H” cylinder = 3.14 L/ psig
• “E” cylinder = 0.28 L/ psig

• Cylinder pressure x Cylinder factor
• ----------------------------------------
• flow rate

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.

One liter of liquid oxygen weighs 2.5 lb (1.1 kg).

multiply 344 x # of pounds

• 1. Hypoxemia
• 2. Labored breathing or dyspnea
• 3. Increased myocardial work

• 1. Tachycardia
• 2. Dyspnea
• 3. Cyanosis (unless anemia is present)
• 4. Impairment of special senses 5. Headache
• 6. Mental disturbance
• 7. Slight hyperventilation (tachypnea)

• 80 mm Hg
• 70 mm Hg
• 60 mm

• Hypoxemic hypoxia
• Anemic Hypoxia
• Stagnant circulatory hypoxia
• Histotoxic Hypoxia

• Caused by lack of O2 in the blood
• alveolar hypoventilation
• diffusion defects 
• v/q mismatch
• right to left shunt

• 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.

• Decreased Hb levels
• CO poisoning
• Excessive blood loss
• Methemoglobin

• 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

• 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

25-30 L/min

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).

• 35-50%
• 5-10 L