Final Review Flashcards
Composition of Pulmonary Surfactant
Mainly composed of depomitoylphosphatidlycholine (Lecithin) and shinogomyelinand
Surfactant Treatment
Most surfactant will be reprocessed and recycled in alveolar type 2 cells
This is why babies only need 1-2 treatment
Common Surfactant
Bovine Lipid Extract Surfactant (BLES)
Beractant (Survata)
Surfactant Production in the Body
Surfactant is produced in type two alveolar cells at 24 weeks gestation
Surfactant is then stored in the lambellar bodies
When is Surfactant Contraindicated
Pulmonary Hemorrhage
BLES Dosing
5 ml/kg
Neonatal Aspiration Risk
The airway is more anterior and superior putting neonates at a higher aspiration risk
Compliance in Neonates
Increased compliance
Cartilage is under developed creating high airway reistance and more collapse in the lower airway
Accessory muscle are under developed so they are more susceptible to failure
Neonate Respiratory Anatomy Compared to Adult
Laryngeal Shape
Neonate: Funnel Shape
Adult: Rectangular
Laryngeal soft tissue and lymph nodes which meakes them more susceptible to swelling and injury.
Neonate Respiratory Anatomy Compared to Adult
Shape and Location of Epiglottis
Neonate: Long/C1
Adult: Flat C4
large and floppy epiglottis (in infants we are using the miller blade to help move the large floppy epiglottis).
Neonate Respiratory Anatomy Compared to Adult
Resting Poistion of Diaphragm
Higher in neonates
Carina Position in Neonates
Carina is higher (3rdvertebrae), T4/5 by age 10
Infants Neck Flexion
Infants have poor neck flexion = higher obstruction risk
Infants Airway
Infant airway is more funnel shaped, narrowest point is cricoid
Neonatal Epiglottis
Infant epiglottis is OMEGA Ω shaped, less flexible, more horizontal
Neonate: Long/C1
Adult: Flat C4
large and floppy epiglottis (in infants we are using the miller blade to help move the large floppy epiglottis).
Infants Tongue Position
Infants have large tongue with posterior placements
Adults have a porportional tongue size
Larger amounts of lymph tissue = higher obstruction risk
Neonate Respiratory Anatomy Compared to Adult
Thoracic Shape
Neonate: Bullet shaped
Adult: Conical shaped
Neonate Respiratory Anatomy Compared to Adult
Laryngeal Shape
Neonate: Funnel Shape
Adult: Rectangular
Laryngeal soft tissue and lymph nodes which meakes them more susceptible to swelling and injury.
Neonate Respiratory Anatomy Compared to Adult
Anteroposterior transverse diameter ratio
Neonate: 1:1
Adult: 1:2
Neonate Respiratory Anatomy Compared to Adult
Body Surface Area/Body Size Ratio
Neonate: 9 x adult
Large heart and belly- increase impedance for tidal volume as the heart is taking up more room
Adult: Normal
Identifing the Patient is Hypoxic
Low SO2 and PaO2
PvO2 <35 mmHg
O2 Delivery <8 ml/kg/min
High lactate >2.8
Criteria to Consider SBT
Resolution of the disease
Adequate oxygenation
HR ≤ 140 bpm, stable blood pressure, stable cardiac rhythm, no ongoing myocardial ischemia, and no uncompensated shock.
No significant uncompensated respiratory acidosis (i.e. pH < 7.30).
Adequate mentation (GCS >= 13) or tracheostomy in place.
Before you Begin a SBT you need to check oxygenation what measure are you looking at
PaO2 ≥ 60mmHg
PaO2/ FiO2 > 150-200 or SpO2 >= 90%, with PEEP ≤ 5-8 cmH2O and FiO2 ≤ 0.4 (or as otherwise described in the regional O2 Protocol).
Initiation of spontaneous breathing trial
To perform the SBT, the RRT will place the patient on PSV of 7cmH2O and PEEP of 5 cmH2O.
If Automatic Tube Compensation (ATC) is used, then set PSV to 0.
First 5 min of SBT
Terminate the test is any of the below occurs
RR > 38
Rapid shallow breathing index (Tobin ratio) > 105
Sweating, anxiety or change in mental status SpO2 < 90% for > 5 minutes
Signs of distress or paradoxical breathing
HR > 140 bpm or a 20% change
Systolic BP < 90 or > 180 mmHg
New dysrhythmia or myocardial ischemia
After first 5 min of SBT
For patients ventilated < 72 hours, continue for 30 minutes.
For patients ventilated > 72 hours, continue the trial for 60-120 minutes.
Monitoring should be done after the first 5 minutes and Q15 there after.
Initiating Mechanical Ventilation Goals
FiO2 at 0.60 and then adjust to maintain SpO2 > 90%.
The physician must order a target SpO2
Note: Default values will be SpO2 ≥ 88% and ≤ 92% for patients with obstructive lungs and chronic CO2 retention, and SpO2 ≥ 90% for all other patients.
When does the physician need to be notified of changes to FiO2
a. The FiO2 has to be set at > 0.60.
b. The FiO2 has to be increased by > 0.30.
This excludes changes for treatment such as suctioning
Arterial Blood Gas Protocol
PA Catheter
Mixed Venous samples will be drawn Q12h in a patient having a PA catheter
It is not mandatory to draw an arterial sample in conjunction with each mixed venous draw.
Weaning Parameters
POINTS OF EMPHASIS
Patient should be on PEEP < 8 cm H2 O and F1O2< 0.60.
Patient’s own minute ventilation should not be greater than 12Lpm.
Try to place the pt in sitting position or elevate their head in order to optimize pulmonary mechanics
Rapid Shallow Breathing Index (Tobin Ratio)
Rapid Shallow Breathing Index (Tobin Ratio) = f (bpm) / VT (L)).
This ratio is determined after the patient had been breathing spontaneously for one minute.
Infants = 32 Weeks 1st Week of Life
Target blood gas
Blood Gas >/= 7.20
PCO2 = 45-55 (40-50 in 1st 48 hours of life)
SpO2= 88-92%
Do not treat metabolic acidosis with hyperventilaion
Criteria for Possible HFV
You only need one of these but will probably have more than one
RR > 80 bpm
Vt >5ml/kg
PIP >25 cmH2O
MAP >12 cmH2O AND FiO2 >0.40
Infants = 32 Weeks 1st Week of Life
Order of Weaning
Volume (4 ml/kg) or PIP (<18 cmH2O) depending on mode
PEEP and Ti
Rate (5-10 increments until you reach 20)
VAP
Ventilator associated pneumonia (VAP) is a nosocomial infection occurring in patients receiving mechanical ventilatory support that is not present at the time of intubation and that develops more than 48 hours after the initiation of that support.
VAP can derive from endogenous bacteria (the baby’s own oropharyngeal flora) or exogenous bacteria (eg: Pseudomonas aeruginosa).
VAP is associated with prolonged hospitalization and increased mortality, especially in the very low birth weight infant.
T-Piece Resusictator
During Resucictation
To deliver inspiration - place finger over the PEEP cap.
To deliver expiration - remove finger from PEEP cap.
Inspiratory time is operator controlled. A longer expiratory time is optimal, therefore the PEEP cap occlusion should be limited to approximately 0.5 seconds, regardless of the intended respiratory rate.
To achieve target respiratory rate of 40-60 breaths/minute repeat
Consider Extubation in Neonates When
RR > 40 with a set RR= 20 bpm AND
Vt= 4ml/kg with PIP <18 cmH2O AND
MAP 7-8 cmH2O AND
FiO2 <0.30 AND
Patient breathign comfortably, hemodynamically stable, no significant increase in TcPCO2, EtCO2 for 1 hour prior to extubation
Where does the MAC Catheter Attach
Attaches to the proximal end of ETT using wye connector, same as inline suctioning
Does not need the diconnection of teh closed system
Surfactant will be dleivered at distal end of ETT reducign the risk for obstruction
Closed Suctioning in Neonates
Suction level- 100-120 mmHg
Preoxygenate by setting FiO2 5-10% above current FiO2 for ~20 sec
Insertion catheter and apply suction for 1-3 sec before withdrawal
Pull out the catheter in a straight motion (without twirling) to prevent kinking. Time from insertion to complete withdrawal should not exceed 5 seconds.
ARDSnet Algorithm
ABG
Oxygenation: PaO2 55-90 and SpO2 88-95%
Ventilation: pH 7.30-7.45
SUCTIONING ENDOTRACHEAL TUBES: NEONATAL
Open Suction Procedure-What Should You Adjust Suction To
Adjust suction to 80-100mmHg and test by kinking tube and reading suction gauge
Primary CPAP Management in the Delivery Room
GA 26-28 Weeks
Principals
Maintain optimal lung volume and FRC
In L&D and acute phase avoid CPAP >6 in infants 26-28 weeks
Early surfactant does not mean immediate surfactant rather surfactant should be administers in NICU when possible
Primary CPAP Management in the Delivery Room
GA 26-28 Weeks
What are your first steps
Clear airway
Initiate CPAP +5, FiO2 0.30
Dry and Stimulate
Attach pulse ox
Primary CPAP Management in the Delivery Room
GA 26-28 Weeks
You just assessed that the patient is spontaneously breathing
Assess that heart rate
If above 100-Move on to next assessment
If below 100-Begin neopuff and NRP
Primary CPAP Management in the NICU
GA 26-28 Weeks
CXR and Blood Gas
Pneumothorax-Discontinued CPAP, intubate, early surfactant, drain pneumothorax as indicated
Hypoinflation: Consider increasing CPAP or consider intubation, and early surfactant
Hypercarbia (arterial): Consider incresing CPAP
Primary CPAP Management in the Delivery Room
GA 26-28 Weeks
You just assessed that the patient’s heart rate, what do you assess next
Assess WOB and SpO2
Mild WOB and SpO2 within range- Maintain CPAP at +5 and FiO2 at 0.30 and prepare to move to NICU
Moderate or Severe WOB and/or SpO2 not within range- Increase CPAP by 1 (Max 6) and increase FiO2 by 0.10-0.20 to achieve targeted SpO2. Then reass WOB and SpO2 if now mild WOB and SpO2 then mainatin level and move to NICU.
If after you make your changes and then FiO2 is >0.60 or there is severe WOB then consider intubation
Primary CPAP Management in the NICU
GA 26-28 Weeks
Moderate WOB OR FiO2 >0.3
Assess interface fit and seal
Assess need for suctioning
Review with dr consider CXR and blood gas
Increase CPAP by 1 with a max CPAP of 6
Primary CPAP Management in the NICU
GA 26-28 Weeks
Mild WOB and FiO2 <0.30
Leave CPAP at same level until able to maintain target SpO2 with FiO2 <0.25
SpO2 >92% for 6.24 hours AND FiO2 <0.25 (if no review with dr and increase CPAP). If yes then review histogram