1st lab practical

• Gas goes through the backchannel and then bubbles back up pushing water down and out to pt
• Nasal Cannula or Face Mask ONLY
• Flow rates of equal or greater than 10 L/min (can produce aerosol at flow rates ≥ 10 L/min)
• Recommended for flow rates 2-6 L/min
• Aka diffuser
• -diffuser allows more output

• Hudson Heater
• This device has a Concha-Column produces humidification using the evaporation process to ensure minimal resistance to gas flow.
• The wired-corrugated tube helps to maintain a constant temperature along the tube. This helps to reduce the “rain” forming when there is a crash of hot and cold temperatures (cold due to the surroundings; room temperature).
• This heater has a hose for water recycling that connect at the top of the reservoir system (prolonging the duration of the sterile water reservoir)

The ones you buy at CVS or Walmart. Are used to humidify air in a room. Point machine directly over patient to humidify the air the patient breathes

• “Artificial nose”
• Change every time check on pt is able, if not NO MORE THAN 3 days
• Filtration can be added (HMEF)
• Has mechanical deadspace
• Short term use
• Exhaled heat and moisture are captured by condenser during exhalation; cool and dry inspired gas is warmed and heated as it flows through condenser
• Standard output of >30mg/L
• Contraindications include:
• Thick, copious, bloody sputum

Expired tidal vol of less than 70%

Body temp less than 89.6F (32 CO)

High Minute Ventilation (≥10 L/min)

Pt receiving in line aerosol drugs

Pt on noninvasive ventilation

• High Flow Device
• Can be connected to either connection on thorpe tube
• Has a capillary tube that allows the gas to push the water upward
• Can be run at a flow as high as 40 LPM

Keep temp the same through whole system

are ACTIVE humidifiers

Provides 100% relative humidity

Bland aerosol therapy

Delivery of sterile water, hypotonic, isotonic, or hypertonic saline aerosols

LVN or VMN

are PASSIVE humidifiers

Humidity deficit helps us understand and allows to know what is the amount of water vapour the body must add to the inspired gas to achieve saturation at body temperature (37 Co)

• Know how to calculate either E or H durations (Calculator WILL be on table to assist)
• E-.28

H-3.14


Duration of Flow= (Psig x Cylinder size) / flow


Psig- if not given use 2200

Gas duration is measured in min


Amount of gas in cylinder= Liquid O2 (lb) x 860/2.5lb/L

Duration of gas= Amount of gas in cylinder/Flow

Know your AIR:OXYGEN RATIOS


How to calculate TOTAL FLOWS

Understand the principle of operation

“Magic Box” or memorize equations or formula

.24 -- 25:1

.28 -- 10:1

.31 -- 7:1

.35 -- 5:1

.40 -- 3:1

.50 -- 1.7:1

.60 -- 1:1

.70 -- .6:1

Total flow= L/min x Air Ratio #

Know ALL of the variable and fixed devices by identification (Sight)


Know ALL of the fi02 ranges of ALL modalities, High and low flow


Know ALL of the flow ranges of ALL modalities, High and low flow

Know proper indications for ALL modalities, High and low flow

Variable: NC, TC, SM, OM, PRBM, NRBM,

Fixed: HFNC, AEM, AEN, Aerosol Mask, T Tube, Face Tent, Trach Collar

Low flow devices:

NC .24-.44

TC .22-.35

SM .35-.50

OM .24-.90

PRBM .40-.70

NRBM .60-.80


High Flow devices:

HFNC .21-1

AEM .21-1

AEN .06-.08

Low Flow Devices

NC 1-6 lpm

TC .25-4 lpm

SM 5-10 lpm

OM 1-flush lpm

PRBM 6-10 lpm

NRBM 10lpm


High Flow Devices

HFNC 40-60 lpm

AEM 4, 12-15 lpm

AEN 28-100 lpm

Face Tent- Facial burns or post op

T Tube- trach patients

• Know the functions and indications for the usage of both Thorpe tube and
• Bourdon gauge
• - 
• Which is Pressure Compensated, Which is gravity dependent?

Types – Standard Flow, High Flow, Low Flow.



Purpose of the 50-psi port (sometimes referred to as the Power Port)

Thorpe Tube:

• Two flow sizes offered, smaller (>15/16 is for peds)
• Can be uncompensated or compensated

Bourdon Gauge:

• The gauge displays a predictable outlet flow
• Measures pressure

Pressure Compensated is the Bourdon Gauge

Gravity Dependent is the Thorpe Tube


*Bourdon Gauge experiences backflow and can give a faulty reading

*Thorpe tube CAN be used for transport except that you will have to pick it up right to read the

volume

• Types and connections
• O DISS vs. QC

O Gas content coming from each outlet (Oxygen vs. Air)

Air-Yellow

O2- Green