cold neb

Question 1

cold neb should be filled with

Answer 1

distilled water and 0.45% saline

Question 2

when will it have higher flow

Answer 2

The lower the FiO2 selected, the greater the size of the entrainment port and subsequently the greater the flow.

Question 3

how does the cold neb provide humidity

Answer 3

Through evaporation of the nebulized particles and though gravity and inertial dependent rain out and deposition.

Question 4

what is the min volume of fluid needed in the SVN (small volume neb)

Answer 4

May consider diluting volume of drug with saline if volume is too small. Ideal volume is around 5ml. nebulization occurs during inhalation and exhalation. Inhalation is less than 40% of the respiratory cycle therefore 60% of the emitted aerosol is lost to the atmosphere. Increasing the volume in the SVN allows a greater proportion of the active medication to be nebulized and inhaled.

Question 5

why is MDI delivery preferred over SVN for med delivery ?

Answer 5

Smaller particle size and better deposition. less oral deposition, quick, lower infection risk

Question 6

oxygen

Answer 6

Common use:
Treatment of hypoxia
Power source for nebs and ventilators
Gas for humidity therapy

Properties:
Makes up 20.9% of the earth’s atmosphere
Becomes a liquid at -183 C
Non-flammable but readily supports combustion

Question 7

medical air

Answer 7

Cylinder Colour:
Black and white (yellow in USA)

Common use:
Power for nebs and ventilators
Gas for humidity therapy

Properties:
Contains 20.9% oxygen and 78% nitrogen
becomes liquid at -195.6

Question 8

helium

Answer 8

brown cylinder
-Used in pulmonary function testing to test residual volume and diffusing capacity
no color, odor or taste

Question 9

heliox

Answer 9

Relieve WOB in airway obstruction
Aerosol medication delivery for status asthmaticus
(example a kid swallows a coin or has a tumor)

Question 10

CO2

Answer 10

grey cylinder
Cylinder Colour:
Grey

Common use:
Treatment of hiccups (carbogen)
Calibration of equipment

Properties:
Colorless, odorless gas
Byproduct of combustion
Waste gas produced by the body
Acts as a weak acid in the body due to the henderson hasselbeck equation

Question 11

nitric oxide (NO)

Answer 11

light blue cylinder
Treatment of pulmonary hypertension (dilates pulmonary vessels)
Treatment of right heart failure

Question 12

nitrous oxide (N2O)/ entonox

Answer 12

cylinder color dark blue
Inhaled gas for analgesia-anaesthesia
Known as laughing gas