Pre-Hospital Treatment Using The Respironics Whisperflow ... · Charlottesville Albemarle Rescue...
Transcript of Pre-Hospital Treatment Using The Respironics Whisperflow ... · Charlottesville Albemarle Rescue...
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Charlottesville Albemarle Rescue Squad - CPAP
CPAPPre-Hospital Treatment
Using TheRespironics Whisperflow CPAP
Device
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Charlottesville Albemarle Rescue Squad - CPAP
CPAP – What Is It?
•C ontinuous
•P ositive
•A irway
•P ressure
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Charlottesville Albemarle Rescue Squad - CPAP
Anatomy Review
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Charlottesville Albemarle Rescue Squad - CPAP
Anatomy Review
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Charlottesville Albemarle Rescue Squad - CPAP
Anatomy Review• Alveoli
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Charlottesville Albemarle Rescue Squad - CPAP
Anatomy Review• Chest Wall
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Charlottesville Albemarle Rescue Squad - CPAP
Physiology Review• Normal Respiration
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Charlottesville Albemarle Rescue Squad - CPAP
Physiology Review• Ventilation - The mechanical
exchange of air between the lungs and the atmosphere – Pulmonary ventilation refers to the total
exchange of gas. – Alveolar ventilation refers only to the
effective ventilation within the alveoli.
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Charlottesville Albemarle Rescue Squad - CPAP
Physiology Review• Respiration - the exchange of oxygen
and carbon dioxide between the atmosphere and the body cells– Occurs at the alveolar level
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Charlottesville Albemarle Rescue Squad - CPAP
Physiology Review• Diffusion - the movement of gas from
an area of higher concentration to an area of lower concentration– This is how respiration occurs
• Must have:– Functional alveoli and capillary walls– An interstitial space between the alveoli and
capillary wall that is not enlarged or filled with fluid
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Charlottesville Albemarle Rescue Squad - CPAP
Physiology Review• Pulmonary Perfusion - the process of
circulating blood through the pulmonary capillary bed– Must have:
• A properly functioning heart (pump)• Proper vascular “size” (tank)• Adequate blood volume / hemoglobin (fluid)
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Charlottesville Albemarle Rescue Squad - CPAP
Using CPAP For Respiratory Emergencies
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Charlottesville Albemarle Rescue Squad - CPAP
What Can We Use CPAP
For?
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Charlottesville Albemarle Rescue Squad - CPAP
•Asthma•COPD•CHF•Pneumonia
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Charlottesville Albemarle Rescue Squad - CPAP
Asthma• A chronic inflammation disorder in the
airways• Acute episodes “triggered” by
something– Causes release of histamine, leukotrienes
• Bronchial smooth muscle constriction• Bronchial plugging from mucus secretion• Inflammation changes
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Charlottesville Albemarle Rescue Squad - CPAP
Asthma (cont)
• Leads to increased resistance to airflow!
• Leading to hypoxemia and CO2 retention
• Leading to hyperventilation• Leading to…respiratory fatigue
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Charlottesville Albemarle Rescue Squad - CPAP
Asthma Assessment/Presentation
• Tripod Position• Wheezing
– A silent chest is an ominous sound!– Flow rates are too low to generate breath
sounds• Inability to speak• Pulse > 130• Respirations >30
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Charlottesville Albemarle Rescue Squad - CPAP
Asthma - Differential Diagnosis
• Consider other causes“All that wheezes is not asthma”
– Pneumonia– COPD– Foreign body aspiration– Heart failure– Pneumothorax– Pulmonary embolism– Toxic inhalation
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Charlottesville Albemarle Rescue Squad - CPAP
COPD• Chronic Obstructive Pulmonary
Disease– Chronic Bronchitis– Emphysema
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Charlottesville Albemarle Rescue Squad - CPAP
Bronchitis• Inflammation of the bronchioles with
large amounts of sputum present• Mucus obstructions
– Leads to gas trapping– Leads to hyper-inflation– Leads to permanent damage
• SOB because of mucus in alveoli
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Charlottesville Albemarle Rescue Squad - CPAP
Bronchitis Assessment/Presentation
• History of respiratory infection• Productive cough
– Large quantity of sputum • SOB• Cyanosis
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Charlottesville Albemarle Rescue Squad - CPAP
Bronchitis Assessment/Presentation
Mucus Mucus
Air comes in, but can’t get out!
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Charlottesville Albemarle Rescue Squad - CPAP
Bronchitis – “Blue Bloater”• A productive
cough 3 months of the year for 2 consecutive years
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Charlottesville Albemarle Rescue Squad - CPAP
Emphysema• Chronic disease• Result of destruction of the alveolar
walls– Cigarette smoking– Exposure to “unfriendly” environment
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Charlottesville Albemarle Rescue Squad - CPAP
Emphysema – Assessment/Presentation
• Skinny!• SOB all the time • SOB worsens with any activity• Barrel chest• Long expiratory phase – Pursed lip• Pink in color (polycythemia)
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Charlottesville Albemarle Rescue Squad - CPAP
Emphysema – “Pink Puffer”
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Charlottesville Albemarle Rescue Squad - CPAP
Pneumonia• Infection of the lung (in the alveoli)• Bacteria or virus invade the lung and
multiply• Body sends WBC to fight infection• Causes “consolidation” in alveoli
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Charlottesville Albemarle Rescue Squad - CPAP
Pneumonia – Assessment/Presentation
• Patient looks “ill”• History of fever• Productive cough with yellow/tan/green• Localized wheezing / rhonchi in affected
lobe, breath sounds may be diminished
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Charlottesville Albemarle Rescue Squad - CPAP
Pneumonia
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Charlottesville Albemarle Rescue Squad - CPAP
Congestive Heart Failure (CHF)
• Left ventricle unable to clear• Leads to increased pressure in left atria• Leads to increased pulmonary
pressures• Fluid collects in lungs
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Charlottesville Albemarle Rescue Squad - CPAP
CHF – Assessment/Presentation• Respiratory Distress• Orthopnea
– Must sit or stand to breath comfortably• Spasmodic coughing (pink frothy sputum)• Paroxysmal Nocturnal Dyspnea• Severe Apprehension, Confusion, “Smothering
Feeling”• Cyanosis • Diaphoretic• Crackles • Wheezing?• JVD
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Charlottesville Albemarle Rescue Squad - CPAP
CHF – Assessment/Presentation
• Vitals:– Sympathetic NS discharge
• Increased blood pressure early• Decreased BP later as patient tires
– Tachycardia– Increased respiratory rate early (40’s)– Decreased respiratory rate as patient tires
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Charlottesville Albemarle Rescue Squad - CPAP
So How Do We Treat Them?...
•The same way we always have. Now we just have a new tool.
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Charlottesville Albemarle Rescue Squad - CPAP
Continuous Positive Airway Pressure
• Respironics Whisperflow
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Charlottesville Albemarle Rescue Squad - CPAP
Circuit Components• These
components come prepackaged together
• Located inside the flap of the CARS Advanced Airway Kit
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Charlottesville Albemarle Rescue Squad - CPAP
CPAP Valves• Valves control
pressure setting• Comes
preassembled with a 7.5 cmH20 valve
• Valves use precision springs
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Charlottesville Albemarle Rescue Squad - CPAP
CPAP Generator
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Charlottesville Albemarle Rescue Squad - CPAP
How It Works - Mechanically• Venturi Effect – Can generate large
flows (140 L/min) with relatively little oxygen usage– Mixes large quantities of ambient air with
a little supplemental oxygen• FiO2 ~30%
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Charlottesville Albemarle Rescue Squad - CPAP
How It Works - Physiologically• Creates a positive end expiratory
pressure (PEEP) of our choosing.
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Charlottesville Albemarle Rescue Squad - CPAP
How It Works - Physiologically• It changes the
partial pressure of oxygen in the blood
• Deoxygenated blood has a lower partial pressure of oxygen than alveolar air so oxygen transfers from the air into the blood.
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Charlottesville Albemarle Rescue Squad - CPAP
How It Works - Physiologically• 7.5cm H2O CPAP increases the partial
pressure of the alveolar air by approximately 1%.
• This increase in partial pressure ‘forces’ more oxygen into the blood.
• Even this comparatively small change is enough to make a clinical difference
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Charlottesville Albemarle Rescue Squad - CPAP
GOALS of CPAP• Change pressure gradient to force more
oxygen into the blood• Maintain positive pressure in the lungs to
force fluid from the lungs• “Splint” alveoli open to prevent collapse
– Greater surface area = improved gas exchange
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Charlottesville Albemarle Rescue Squad - CPAP
Oxygen Consumption
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Charlottesville Albemarle Rescue Squad - CPAP
Indications• Any patient who is in severe respiratory
distress with signs and symptoms consistent with asthma, COPD, pulmonary edema, CHF, or pneumonia and who:– Is awake and able to follow commands– Is over 12 years old and is able to fit the CPAP
mask to face– Has the ability to maintain an open airway
• AND exhibits two or more of the following:– Has a spontaneous RR >25 breaths per minute– Has SPO2 <94% at any time– Uses accessory muscles during respiration
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Charlottesville Albemarle Rescue Squad - CPAP
Contraindications• Contraindications:
– Any patient suspected of having a pneumothorax or has suffered trauma to the chest
– Any patient with a tracheostomy– Any patient who is actively vomiting or
has upper GI bleeding– Any patient with facial trauma or an
inability to gain a good seal when attaching mask to face
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Charlottesville Albemarle Rescue Squad - CPAP
Application Procedure
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Charlottesville Albemarle Rescue Squad - CPAP
Procedure1. Explain procedure to
patient• Far better success with
explanation and coaching2. Select the proper size face
mask for the patient.• The circuit comes
pre-packaged with a large mask.
• The medium mask has a sizing tool on the bag
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Charlottesville Albemarle Rescue Squad - CPAP
Procedure (continued)
3. Attach the corrugated tube from the circuit to the port on the end of the CPAP generator.
4. Attach the oxygen hose to the CPAP generator.
5. Attach the bacteria filter to the port on the side of the CPAP generator.
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Charlottesville Albemarle Rescue Squad - CPAP
Procedure (continued)
6. Attach the oxygen hose to a source.
• Any oxygen port in the back of the ambulance
• The green dongle on the regulator in the oxygen caddy
7. Apply the mask to the patient’s face.
8. Pull the straps around the patient’s head and secure to the bottom of the mask.
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Charlottesville Albemarle Rescue Squad - CPAP
Procedure (continued)
9. Adjust mask position and strap tightness to achieve a seal with minimal air leakage.
10. Secure the CPAP generator to the patient’s arm.
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Charlottesville Albemarle Rescue Squad - CPAP
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Charlottesville Albemarle Rescue Squad - CPAP
Cautions• Watch for gastric distension
– = Vomiting• Watch for hypotension
– Due to preload/afterload changes• Watch for a tension pneumothorax
– Especially in emphysema patients
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Charlottesville Albemarle Rescue Squad - CPAP
Things To Consider
• CPAP CAN be used on DNR patients• The mask can make them
claustrophobic…even though they need it. TALK TO THEM! COACH THEM!
• If you need a higher FiO2, use blow-by oxygen around the bacteria filter
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Charlottesville Albemarle Rescue Squad - CPAP
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Charlottesville Albemarle Rescue Squad - CPAP
Parts ‘n Pieces
It’s All In
Here!
It’s All In
Here!
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Charlottesville Albemarle Rescue Squad - CPAP
Parts ‘n Pieces
CPAP KitCPAP KitMedium MaskMedium MaskCPAP Circuit CPAP Circuit
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Charlottesville Albemarle Rescue Squad - CPAP
Parts ‘n Pieces
CPAP Circuit BagCPAP Circuit Bag
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Charlottesville Albemarle Rescue Squad - CPAP
Parts ‘n Pieces
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Charlottesville Albemarle Rescue Squad - CPAP
Where Do I Plug It In?
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Charlottesville Albemarle Rescue Squad - CPAP
Step 1: Assemble & Plug In
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Charlottesville Albemarle Rescue Squad - CPAP
Step 2: Explain The Procedure!
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Charlottesville Albemarle Rescue Squad - CPAP
Step 3: Apply To FaceGive The Patient A Chance To AdjustGive The Patient A Chance To Adjust
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Charlottesville Albemarle Rescue Squad - CPAP
Step 4: Secure Straps To Mask
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Charlottesville Albemarle Rescue Squad - CPAP
Step 5: Pull Straps Until Snug FitHold The Mask Until Both Sides Are TightHold The Mask Until Both Sides Are Tight
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Charlottesville Albemarle Rescue Squad - CPAP
Step 6: Secure The Straps It’s Velcro…Just Push!It’s Velcro…Just Push!
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Charlottesville Albemarle Rescue Squad - CPAP
Step 7: Secure CPAP To Arm
Secure To ArmSecure To Arm
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Charlottesville Albemarle Rescue Squad - CPAP
Step 8: Evaluate
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Charlottesville Albemarle Rescue Squad - CPAP
That’s Great…But What If The Patient Needs A Neb?
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Charlottesville Albemarle Rescue Squad - CPAP
What About An Inline Neb?
The Only Non-Standard PartThe Only Non-Standard Part
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Charlottesville Albemarle Rescue Squad - CPAP
It’s On The Top Flap
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Charlottesville Albemarle Rescue Squad - CPAP
Make Sure It’s Level
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Charlottesville Albemarle Rescue Squad - CPAP
Questions?