TEST 1 Flashcards
1 KG = how many g?
1000
1 g = how may mg and how many mcg?
1000 mg
1,000,000 mcg
1 mg = how many mcg??
1000 mcg
0.1 mg = ____ mcg
100 mcg
0.01 mg = _____ mcg
10 mcg
0.001 mg = ____ mcg
1 mcg
How many mcg/ml of epi is in 1:200,000
1,000,000 divided by 200,000 = 5 mcg/ml
2% Lidocaine = _____mg/ml
20
0.25% Marcaine = ______ mg/ml
2.5 mg/ml
__________ characteristics have a strong influence on a child’s behavior during perioperative response
Parental
Children of parents who are more anxious, children of parents who use avoidance coping mechanisms, and children of separated/divorces parents appear to be at HIGH/LOW risk for developing preoperative anxiety
HIGH
What is PPIA?
Parental Presence during Induction of Anesthesia
Do most parent want to be present during induction? TRUE or FALSE
TRUE
One study found that mothers who were most highly motivated to be present at induction of anesthesia reported LOW/HIGH levels of anxiety and their children were LESS/MORE distressed at induction.
HIGH levels of anxiety
MORE distressed
More than ____% of parents report some degree of anxiety during induction
90%
What is the most upsetting actor for the parent during the induction process?
Seeing the child go limp and then having to leave them
What are some most commonly used pre-op medications that you can use if the child has pre-op anxiety?
Midazolam, Ketamine, Transmucosal fentanyl, Dexmedetomidine
What is the best way to reduce anxiety in your pediatric patient?
Establishing a rapport and telling the child in an appropriate way what is important for the child to know, can make a great difference.
Ask for the child’s favorite stuffed animal or toy.
Play with the child a little and establish good eye contact
What do you want to make sure to mention to the child when building a rapport?
Make sure to mention that NOTHING HURTS and there to keep the child comfortable, and at the end we are waking the child up to meet his or her parents in the “wake up room” PACU.
What is the utmost major importance when it comes to pediatric anesthesia?
The physiologic differences related to general metabolism and to immature function of various organs (heart, lungs, kidneys, liver, blood, muscles, and CNS)
What weight is prematurity usually?
less than 2500 gm (2.5 kg) at birth
A pre-term infant is born before ______ weeks of gestation
37
Term infant is born AFTER ________ wks and BEFORE _______ completed weeks of gestation.
37 weeks and before 42 weeks
Post term infant is born after _______ completed weeks of gestation
42
Neonate is defined as
< 30 days
Infant is defined as
1-12 months
Children is defined as
1-12 years
Adolescent is defined as
13-19 years
What is low birth weight (LBW)?
Less than 2.5 kg
What is Very Low Birth Weight (VLBW)?
Less than 1.5 kg
What is Extremely Low Birth Weight (ELBW)?
Less than 1 kg
What is a “Micro-preemie”?
Less than 750 gm
With a micro-preemie, when is it appropriate to go to surgery?
Emergent surgery
Duration of gestation and the weight of an infant have an important relationship. Deviations from this relation is associated with what (6) things
INADEQUATE MATERNAL NUTRITION (Malnutrion or placental insufficiency)
SIGN. MATERNAL DISEASE (pregnancy-induced HTN, DM, collagen disorders)
MATERNAL TOXINS (tobacco, alcohol, drugs)
FETAL INFECTIONS (toxoplasmosis, rubella, CMV, syphilis)
GENETIC ABNORMALITIES (Trisomy 21, 18, 13)
FETAL CONGENITAL MALFORMATION (Zika virus -> micro/macroencephaly)
What measurement is the most sensitive index of well-being, illness, or poor nutrition over length or head circumference?
WEIGHT
What is commonly used as a measurement of growth?
Weight
This indicates that there may be a serious underlying disorder in a child?
Failure to thrive
How do you calculate IBW for children <8 yrs?
2 x Age + 9
How do you calculate IBW for children > 8 yrs?
3 multiplied by age
At full-term birth, the infant has a _________ neck and a ____________ that often meets the chest at the level of what rib?
Short neck, and a chin at the level of the 2nd rib
Due to short neck and a chin that meets the 2nd level of the ribs, infants are prone to what?
Upper airway obstruction during sleep
In infants with tracheostomy, the orifice is often buried under ______ unless the head is __________ with a roll under the neck.
the chin; extended
In addition, infants are more prone to UPPER airway obstruction under this kind of anesthesia.
GETA
Why are infants more prone to upper airway obstructions under GETA?
Because upper airway muscles (which normally support the airway patency) are DISPROPORTIONALLY SENSITIVE TO THE DEPRESSANT EFFECT OF GETA = pharyngeal airway collapse and obstruction
What is the best thing for you to help the infant with upper airway obstruction?
Place in SNIFF position with JAW THRUST. DO NOT HYPEREXTEND especially with Down Syndrome patient
What are the major differences between neonatal and adult airway? (2)
Tongue: relatively large in proportion to the rest of the oral cavity —-> airway can easily obstruct
Position of larynx: Infants larynx is more cephalad (C2-C3) vs. and Adult (C4-C5)
What type of laryngoscope blade makes visualization of glottic opening easier than a curved bald?
A straight DL (either a Miller or Wis-Hipple)
Infants epiglottis is __________ and ___________-shaped and ________ into the lumen of the airway, making it EASIER/DIFFICULT to displace ANTERIORLY during laryngoscopy.
Narrower
Omega-snapped
Angled
DIFFICULT
The presence of _______________ tonsil and adenoid tissue can cause rapid development of upper airway obstruction after administration of GETA.
hypertrophied
Amount of primary teeth? Begin to erupt when? And shed at what age?
20 primary teeth
Erupt during the first year of life
Shed at age 6-12
What does pre-op physical exam of children include?
Search of loose teeth that could be dislodge during airway management and lost within the respiratory tract.
Examine braces, loose, or damaged pieces.
Amount of permanent teeth? Begin to appear when?
- When primary teeth shed.
When mask ventilating a neonate, what 3 things is associated with airway obstruction?
Unintentional jaw pressure from neck flexion
Submental pressure
Mandibular pressure
What is a common error that most CRNAs make when mask ventilating a pediatric patient?
Holding the mask TOO LOW over the nose and COMPRESS the nasal passages
Also, many infants have some degree of ___________, rendering the supraglottic structured prone to collapse during inspiration.
Laryngomalacia
What is the most effective mask ventilation technique for infants and young children?
For the anesthetist to hold the mask over the mouth and nose with thumb and index finger, while the middle finger is placed on the bony portion of the mandible ——> the chin can be lifted to provide head extension (but be careful) without compressing the soft tissues of the neck. SNIFF POSITION.
To improve airflow during upper airway obstruction in pediatrics, what steps can you do? (3)
Chin lift, jaw thrust, and apply some CPAP (5-15 cm H2O pressure at APL valve)
CPAP can unintentionally do what?
Inflate stomach
Chin lift will extend the head at the ____________________ joint, thus stretching and straightening the airway to DECREASE the severity of soft tissue obstruction
Atlanto-occipital joint
If a correct artificial airway is selected—-> what does it relieve?
Airway obstruction secondary to the tongue without damaging laryngeal structures. Should results in proper alignment with the glottic opening.
If TOO LARGE of an oral airway is inserted, what happens?
The TIP lines up posterior to the angle of the mandible and OBSTRUCTS the glottic opening by pushing the EPIGLOTTIS down.
IF TOO SMALL of an oral airway is inserted, what happens?
Tip lines up well ABOVE the angle of mandible; airway obstruction is thus exacerbated by KINKING the tongue
______ airway may relieve upper airway obstruction as well as provide a useful conduit for delivering O2 and anesthetic gases.
NASAL
To avoid trauma and bleeding of the nasal mucosa, nasal airway should be lubricated and inserted ________________ direction along the floor of the nasal cavity.
Posterior-caudad
When do you AVOID NASAL TRUMPETS in children? (2 things)
Bleeding -> coagulopathy and/or thrombocytopenia
Trauma -> Suspicion of traumatic basilar skull fracture
When compared with ETT, _______ is associated with LESS/MORE laryngeal stimulation and a decreased incidence of airway complications in children with upper respiratory tract infections
LMA;
LESS
Peak inspiratory pressure should not exceed ________ cmH2O to prevent gastric insufflation.
20
When is an LMA not indicated?
Children at risk for pulmonary aspiration of gastric content
What is the LMA size for a pediatric patient with a weight of < 5 kg?
LMA 1
LMA size for 5-10 kg?
LMA 1.5
LMA size for weight 10-20 kg
LMA 2
LMA size for 20-30 kg?
LMA 2.5
LMA size for 30-50 kg?
LMA 3
LMA size for 50-70 kg?
LMA 4
In neonates and small infants, DL is often challenging because of what 2 things?
Smaller and more cephalad location of the larynx; and narrower view through the oropharynx
How do you calculate a child 2-6 years of age for an UNCUFFED ETT?
Age (yrs) + 16
———————
4
CUFFED ETT?
Age (yrs) + 16
——————— - 1/2 size
4
Size of ETT (cuffed or uncuffed) And Depth of ETT for a preterm <1000g?
Uncuffed 2.0
Depth: 6 cm
Size of ETT (cuffed or uncuffed) And Depth of ETT for a preterm <2000g?
Uncuffed 2.5
Depth: 7-9 cm
Size of ETT (cuffed or uncuffed) And Depth of ETT for full term neonate?
Uncuffed 3.0-3.5
Depth: 9.5-10 cm
Size of ETT (cuffed or uncuffed) And Depth of ETT for a 1 year old?
Cuffed 3.0-3.5 (no air applied at times)
Depth: 11 cm
Size of ETT (cuffed or uncuffed) And Depth of ETT for a 2 year old?
Cuffed 4.0-4.5
Depth: 12 cm
Size of ETT (cuffed or uncuffed) And Depth of ETT for a 6 year old?
Cuffed 5.0-5.5
Depth: 14-15 cm
Size of ETT (cuffed or uncuffed) And Depth of ETT for a 10 year old?
Cuffed 6.0-6.5
Depth: 16-17 cm
Size of ETT (cuffed or uncuffed) And Depth of ETT for a 16 year old?
Cuffed 7.0-7.5
Depth: 18-19 cm
Size of ETT (cuffed or uncuffed) And Depth of ETT for a 20 year old?
Cuffed 7.0-8.0
Depth: 20-21 cm
ETT length, where should the black line marking rest?
At the level of the vocal cord, that means that the tip of the ETT is between the carina and VC
After successful intubation, what should you have the MDA do?
While assist-ventilating the child, the MDA slowly advances the ETT and simultaneously listens to breath sounds at the left chest wall
At the moment when the breath sounds are lost, the ETT is where? And what should you do?>
RIGHT MAIN BRONCHUS
Pull back a “centimeter” until bilateral breath sounds occurs
Where is the narrowest part of the infants larynx??
The CRICOID CARTILAGE
Both the adult and infant’s larynx are __________________-shaped, but is more __________ in the infant/toddler
funnel-shaped
Exaggerated
Because of the funnel shaped larynx, when a large diameter ETT is inserted through the glottic opening, the tube passes through the cords, but meets resistance where?
IMMEDIATELY BELOW THE CORDS (subglottic or cricoid ring)
UNCUFFED/CUFFED ETTs are used for premature and full-term neonates/small infants because the cone-shaped trachea will seal off the trachea.
UNCUFFED
CUFFED ETTs may cause what (5) things in premature and full-term neonates/small infants?
Mucosal trauma
Inflammation
Post-intubation croup
Potentially Malacia
And stenosis
Cuffed ETTs are use in children > ______ year with appropriate _________ test.
1 year
“Leak test”
Cuffed ETTs will allow what (3) things?
Adequate ventilation
Less OR pollution
Spares the child from extra DL attempts to change ETT if it is incorrectly sized
Where should your MDA auscultate for leak test?
Cricoid cartilage or sternal notch
What is the purpose of a leak test?
To assess for a leak at 18-20 cm H20 pressure to prevent airway edema/Post intubation stridor
What is occurring when your patient has a large leak around the cuff and you are unable to hold pressure at 20 cm H20? (Floppy green bag)
ETT is possibly too small with a LARGE LEAK
When there is a large Leak, what can your MDA do to your ETT?
The MDA adds first some air into the cuff to seal the leak, hold pressure at 20 cm H20 and then the MDA slightly deflates the air until air escapes (created leak)
What type of leak is occurring when after intubation, you are slowly and steadily closing the APL valve to 20 cm H2O pressure, MDA listens over the patients mouth/sternal notch, squeaky sounds occurs at that particular pressure?
ETT is appropriately sized
If the leak is around 18-20 cm H20 pressure, no air needs to be added
What type of leak is occurring when after intubation, you are slowly and steadily closing the APL valve to 20 cm H20 pressure, there is no leak. Increases to 25-30 cm H20 pressure, and still no leak?
ETT is TOO snug
If the ETT is too snug, what needs to be done?
Replaced by a smaller size
What laryngoscope blade can be used for a pre-term?
Miller 00
Miller 0
What laryngoscope blade can be used for a neonate?
Miller 0
What laryngoscope blade can be used for a neonate- 2 yr?
Miller 1
What laryngoscope blade can be used for a 2-6 yr old?
Wis-Hipple 1.5
MAC 1 or MAC 2 (usually for a McGrath)
What laryngoscope blade can be used for a 6-10 yr old?
Miller 2
MAC 2
What laryngoscope blade can be used for > 10 yr old?
Miller 2
Miller 3
MAC 3
For a nasotracheal intubation, what topical vasoconstrictor medication do you apply bilaterally after induction?
Oxymetazolin 0.05%
NASAL RAE should be placed where prior to use to make it more pliable?
In the OR warmer or placed packaged nasal RAE in a plastic bag in the nozzle of bair hugger
What should you insert before inserting a warmed, lubricated nasal Rae?
Lubricated nasal trumpet to dilate
What do you use to gently guide the nasal RAE into the glottic opening?
DL and Migill forceps
Nasal intubate may cause transient bacteremia, what kind of prophylaxis is indicated?
Endocarditis prophylaxis in susceptible children
What is a reflex closure of the upper airway (glottic musculature spasm)?
Laryngospasm
How is laryngospasm elicited?
Elicited by stimulation for the AFFERENT fibers contained in the INTERNAL BRANCH of SUPERIOR LARYNGEAL NERVE (SLN)
What type of laryngospasm has inspiratory stridor?
Partial laryngospasm
What kind of laryngospasm includes no air movement, tracheal tug, paradoxical movement of the chest/abdomen, desaturation, and bradycardia?
COMPLETE laryngospasm
What can laryngospasm lead to?
Serious morbidity: cardiac arrest, arrhythmia, pulmonary edema, bronchospasm, gastric aspiration
Laryngospasm can also be thought of what other airway obstruction?
Bronchospasm or supraglottic obstruction
What are (4) anesthesia-related factors of laryngospasm?
Insufficient depth of anesthesia during induction/emergence
Insufficient depth during tracheal intubation/extubation
Saliva/blood/mucus or airway manipulation (suction catheter or laryngoscope)
Violate agents (pungent DES/ISO)
What are (7) patient related factors contributing to laryngospasm?
Younger children= greater risk
URI
Active Asthmas
Airway hyperreactivity after respiratory infection (up to 6 weeks)
Smoking exposure
GERD
Hx of elongated uvula of choking during sleep
What are surgery-related factors contributing to laryngospasm?
T&A
Lap Appy
Thyroid surgery (injury to SLN)
Iatrogenic removal of parathyroid gland (hypocalcemia)
Esophageal procedures
What (4) measures can you take to to prevent laryngospasm?
Deepen anesthesia during airway manipulation and IV placement
Awake vs deep extubation
Positive inflation of lungs before extubation
Reduced salivation with small amounts of Glyco
What is the initial treatment for laryngospasm?
Identify and remove the offending stimulus, apply jaw thrust (pressure on laryngospasm notch), insert an oral airway, and apply positive pressure ventilation with 100% oxygen
What medications/actions can you do if laryngospasm persists?
Deepen anesthesia with SEVO
- 5 mg/kg Propofol IV
- 1-1.0 mg/kg SUCC IV
4 mg/kg IM SUCCS
What should you give before administering SUCCS?
Atropine 10-20 mcg/kg IV or 20-40 mcg/kg IM.
NOT LESS THAN 100 mcg
After laryngospasm, what should you assess for?
Gastric distension -> suction stomach with OGT
NPPE (usually occurs in large muscular males)