Quiz 2 (Mike, Ch. 6).txt
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Quiz 2 (Mike, Ch. 6).txt
CRAFTON HILLS COLLEGE RESP 139 QUIZ MIKE
CRAFTON HILLS COLLEGE RESP 139 QUIZ 2 (MIKE, CH.6)
What are the indications for airway clearance?
- Retained secretions
- Excessive secretions:
What are the contra-indication for airway clearance?
Hypoxemia during treatment
Feedings within the previous 45-60 minutes
History of reflux
History of intraventricular hemorrhage
Congestive heart failure
What is the indication for suctioning?
To facilitate the removal of respiratory tract secretions
What are the hazards of suctioning?
- Vagal nerve stimulation.
- Hypoxemia induced.
What is the procedure for suctioning a neonatal patient, including catheter size?
Suction catheter should be no larger than half the size of the inner diameter of the endotracheal tube.
- Table 6-5 pg. 167
Suction vacuum should be set at negative 60-80 for infants.
- Negative 80-100 for pediatric patient
Limit to less than 5 seconds of suction.
Saline irrigation needs to be limited to 0.5 ml of normal saline.
Pre-oxygenate at 10-15% higher FI02 unless patient has problems, then increase as needed.
What is Postural drainage?
Placing the patient in the correct gravity dependent position to let gravity pull the secretion up toward larger airways
What is Percussion?
Rhythmic clapping on the chest to get the vibration to loosen secretions from the airways.
Done while the patient is in gravity dependent position, this will facilitate secretion removal
What is Vibration?
A rapid movement of the chest wall to shake loose secretions
What is PEP?
A resistance device is used to create positive expiratory pressure as the patient breathes in and out through via mask or mouthpiece.
May (or may not) be given in conjunction with aerosol therapy.
The expiratory resistance is performed 10-20 times followed by forced exhalation technique to expel secretions.
The expiratory resistance causes mechanical bronchodilation and increases the ventilation of areas distal to the mucous obstructions.
Forced exhalations then propel mucous up and our of the airway.
Use as many repeated attempts as needed to remove mucous.
As the patient exhales resistance is adjustable to 15-30 or as high as 60-80 cm H2O
What is forced expiratory technique (FET)?
After performing PEP therapy, the patient should perform a
forced expiratory maneuver (Huff Cough).
- Patient inhales slowly then does 2-3 "huff" exhalations against an open glottis followed by a strong cough.
- The "huffs" help to stabilize and keep the airways open, allowing secretions to mobilize in the airways.
What is the Flutter Valve?
: Loosens mucus through expiratory oscillation as positive expiratory pressure splints airways
May not be effective at low airflows
: 10 - 15 minutes
What is the Vest?
Generally, you will start with the pressure control dial at #1 and increase, as tolerated.
Setting the frequency for CF patients.
Low freq. 5-10 Hz for 10 min.
Medium freq. 11-15 Hz for 10 min.
High freq. 16-20 Hz for 10 min
What are some facts about Intrapulmonary Percussive Ventilation (IPV)?
Used independently or with caregiver supervision
Used with aerosolized meds
May not be well tolerated by patient
: "percussion" on both inspiration, but most benficial on expiration
Rate 120-300 cycles/min (2 - 5 Hz).
Pressures of 10-40 cm H2O
Nebulizer produces dense, small particle aerosol
: 20 minutes
In theory, three forms of therapy are provided during IPV:
1. percussive oscillatory vibrations which loosen retained secretions.
2. high density aerosol delivery to hydrate viscous mucous plugs
3. positive expiratory pressure (PEP) to recruit alveolar lung units and assist in expiratory flow acceleration during a cough maneuver.
What is an In-Exsufflator?
: creates mechanical "cough" through the use of high flows at positive and negative pressures.
Positive/negative pressures up to 60 cm of water.
Used independently or with caregiver assistance.
There are five primary settings on the typical automatic in-exsufflator:
- The inhale time.
- The inhale pressure.
- The exhale time.
- The exhale pressure.
- The pause time between the inhale and exhale phases.
These settings are adjusted so that they generate a good, productive cough without causing discomfort.
What are the indications for aerosol therapy?
the need to deliver an aerosol medication to the lower airways
What are some substances we aerosolize?
Beta adrenergic agents
Anti-inflammatory agents (Corticosteroids)
Mediator-modifying compounds (Mast Cell Wall Stabilizers)
What are the hazards of aerosol therapy?
Medication side effects
What will affect particle amount and size?
- Depends on the type of nebulizer.
- Jets are used often but the amount varies considerably depending on the type and brand of nebulizer used.
- In pediatrics, like adults, much of the medication is lost during expiration.
More drug is delivered when the volume of diluents is increased.
When administered to intubated infants, the dosages need to be increased due to the reduced deposition.
What will affect Particle characteristics?
Hygroscopic nature of particles.
Viscosity and concentration of the medication.
Velocity the drug (due to the administration device).
What are some affects of Airway anatomy?
The narrower the airway, the greater the deposition.
Neonatal airway is small to start with then add the ET tube, bronchoconstriction, and mucous.
Whitaker believes that the amount that the amount of drug reaching the terminal airways is negligible.
What are some affects of Ventilatory pattern on aerosol deposition?
Best pattern is with laminar flow in a slow deep inspiration with inspiratory pause.
This may be done on a ventilator but is near impossible with a breathing infant.
What are advantages of nebulizers?
Little patient coordination required
Effective in acute respiratory distress, flow, or volume
Ability to give either a large or small volume of aerosol
Drug dosage and/or particle size can be modified
What are disadvantages of nebulizers?
Less easily transported
Cleaning and preparation required
Amount of medication delivered is variable
Provides a medium for bacterial growth.
What are the advantages of MDI?
Efficient drug delivery
Short preparation and delivery time
Particles resist hygroscopic growth
Can be used on newborns/infants
What are the disadvantages of MDI?
Limited choice of drugs and concentrations.
Possible reaction to propellants.
Foreign body aspiration.
What are the advantages of DPI?
Similar to MDI
Limited hand breath coordination needed
Doses easily counted
What are the disadvantages of DPI?
Limited number of drugs
Possible airway irritation
Possible reaction to the carrier powder
Requires high inspiratory flow
Requires loading before use
Less useful in acute obstruction
Can only be used on ages 4+
What is the SPAG and what is it used for?
Designed to deliver Ribavirin for RSV bronchiolitis
Gas-powered jet nebulizer uses three jets
Uses drying chamber to shrink particles
Baffle is sides of container
Aerosolized Ribavirin has generally fallen out of favor as a treatment for RSV.
The exception being patients with chronic respiratory or cardiac anomalies who go on to develop RSV.
New research is looking at Ribavirin as a possible treatment for SARS.
What are the indications for Oxygen Therapy?
Treat and relieve documented hypoxemia
Decrease workload on heart
What are the contradications for Oxygen Therapy?
For Neonates less than 35 weeks gestation, what is expected PaO2 and SpO2?
Pao2 50 - 70 mmHg
Spo2 88 - 95%
For Larger infants and children greater than 35 weeks gestation, what is expected PaO2 and SpO2?
Pao2 > 60 mmHg
Spo2 > 95%
What are the signs of hypoxia in a newborn?
Apnea and/or bradycardia
- Because fetal Hb has increased affinity for 02 the newborn's pa02 may drop to 30-40 torr before cyanosis appears
What are the hazards of Oxygen Therapy in a new born?
What is the GOAL of Oxygen Therapy in a newborn?
Maintain pa02 of 50-80 torr based on the age of the newborn
Pa02 of pa02 of 100 torr may be required for PPHN (persistent pulmonary hypertension in the newborn)
What are common Oxygen Delivery Devices for neonatal and pediatric patients?
What is an Oxygen Hood and when are they used?
delivery device of choice in the preemie for the first days of life.
The oxygen is administered via a heated humidified hood via a blender.
- Both the fi02 and the air temperature must be controlled.
- An O2 analyzer should always be used.
Increased CO2 build up if the flow is too low is a potential hazard
What is an Oxygen Cannula and when are they used?
Newborns, even preemies can be given 02 by nasal cannula.
USED ON PATIENT with chronic oxygen needs or as weaning tool from other modes of delivery.
Because the infant's Ve is so low, the FI02 at a given flow rate differs drastically from the FI02 of adult 02 cannula.
Neonatal flow meters can be calibrated as low as 0.025 lpm.
Estimated FIO2 on the nasal cannula at various flowrates for patients under two years of age:
1/4 Lpm 25%
1/2 Lpm 30%
1 lpm 35%
What is a Mist Text and when are they used, and what is the disadvantage of it?
RARELY USED ANYMORE
Once the infant is old enough to roll over and sit up, he is too big for a O2 hood.
The disadvantage of a mist tent is that the infant will no longer get an exact fi02 inside the croup tent.
The fi02 of the mist tent runs between 21% and 50%, but there is little control because the enclosure is too large for fine-tuning.
Mist tents are more tolerated by the infant, since mom can get in tent to hold them
What is an Oxygen Mask, when are they used, and is it a good choice for oxygen delivery device?
The 02 mask is a poor choice for an infant because it can obstruct his/her airway.
It is a poor choice for the toddler because the child has an instinct to protect his/her face and nose and he/she will pull it off.
At about 3 years of age the child might wear a mask, but the nasal cannula is generally preferred.
Once a child is old enough to tolerate a mask, one has the same choices as with the adult.
As with the adult patient the entrainment mask is the only sure method of exact fi02 delivery because these are high flow systems.
What are the indications for Resuscitation bag?
Delivery of oxygen for short periods.
Delivery of oxygen during initial resuscitation.
FIO2 80-100% when used properly with reservoir.