#3: Oxygen Delivery Devices

Question 1

Indications for LTOT: (2)

Answer 1

1- arterial PaO2<55 mmHg or an arterial oxygen saturation SaO2<88%
2- arterial PaO2<60 mmHg or an arterial oxygen saturation SaO2<90% AND either cor pulmonale, RHF, or erythrocytosis (Hct>55%)

Question 2

Indications for prescribing oxygen during sleep: (3)

Answer 2

1-PaO2<55mmHg
2-Pulse Ox (SaO2)<88%
3-PaO2 falls 10 mmHg or more during sleep AND sxs of nocturnal hypoxemia (insomnia, restlessness, or impaired cognitive process)

Question 3

Clinician Responsibilities in prescribing LTOT: (8)

Answer 3

1– Proper determination of need
2– Determining the oxygen flow rate for each condition (ie, the required flow rate may be different during sleep, exercise and sedentary
wakefulness)
3– Assuring the selection of a qualified durable medical equipment supplier
4– Completion of the Certification of Medical Necessity (CMN)
5– Providing a prescription for ambulatory oxygen if required
6– Testing patients using the portable oxygen device provided during
typical exercise to assure adequate oxygenation
7– Reassessment for prescription renewal and/or modification
8– Patient education and training

Question 4

Recommended FIO2 and nasal cannula oxygen settings to achieve ambient air PaO2>60mmHg with PaO2 levels of: 50mmHg, 45mmHg, 40mmHg, and 35mmHg:

Answer 4

PaO2 50mmHg: 24 FiO2: 1 L/min
PaO2 45mmHg: 28 FiO2: 2 L/min
PaO2 40mmHg: 32 FiO2: 3 L/min
PaO2 35mmHg: 36 FiO2: 4 L/min

Question 5

MC used oxygen therapy delivery device

Answer 5

Nasal cannula

Question 6

A bubble humidifier should be used with a nasal cannula to prevent nasal drying at rates above this:

Answer 6

3 L/min or higher

Question 7

This salve should never be used with a nasal cannula:

Answer 7

Petroleum jelly

Question 8

FiO2 is dependent on these: (3)

Answer 8

1- Tidal volume (Vt)
2- Respiratory rate (RR)
3- Inspiratory to expiratory ratio (I:E)

Question 9

Nasal cannula flow range:

Answer 9

1-6 L/min

Question 10

A non-rebreather mask FiO2 range:

Answer 10

21-100%

Question 11

This supplemental oxygen device utilizes one-way valves systems:

Answer 11

Non-rebreather mask

Question 12

Another name for air entrainment mask:

Answer 12

Venturi mask

Question 13

Air entrainment mask can provide FiO2 up to:

Answer 13

55%

Question 14

This supplemental oxygen device is most beneficial when a pt. requires a fixed and precise fiO2:

Answer 14

air entrainment mask

Question 15

This supplemental oxygen device utilizes entrainment ports to to control the amount of air mixed with oxygen:

Answer 15

air entrainment mask

Question 16

When selecting a supplemental oxygen device, one should use this method and what are they? (3)

Answer 16

“The three P’s”

• pt.
• purpose
• performance