LMA Flashcards
Dr. Brain developed what?
the LMA
advantages of LMA
- Less stimulating during use (cf ETT)
- Does not require neuromuscular blockade for placement or maintenance (cf ETT)
- Less ↑ in intrathoracic and intraabdominal pressures during
- emergence (cf ETT)
- Less cardiovascular response (cf ETT)
- Less ↑ in IOP (cf ETT)
- Frees practitioner’s hands (cf face mask)
- Provides post-op airway (cf OAW, NAW)
Disadvantages of LMA
- Learning curve
- Over-estimated ease of use
LMA function = it
establishes
airway with
_____ seal
supraglottic
In an LMA, there is _____ between
airway tube and
body of mask
≈ 30o
what the size of the LMA connector?
15 mm connector
how much air goes in a size 4 LMA
30 mL of air
(Size - 1 , then add a 0)
i.e. size 5 = 40 mL of air
what pharynx does the cuff of the LMA sit when correctly inserted?
hypopharynx (a.k.a. larnygopharynx)
where should tape an LMA
zygomatic region
Which oral structure might you see edema in due to the LMA?
which laryngeal joint can be dislocated due to LMA
Cricoarytenoid joint dislocation
LMA insertion can stimulation which cranial nerves?
CN IX
CN X
Indications for LMA
- Administration of general anesthesia
- Establish airway emergently for PPV
- Facilitate endotracheal intubation
- Adjunct to FFOB airway management
- Recovery from high-risk surgical procedures
contraindications of LMA
- Risks of aspiration (GERD, not NPO, hiatal hernia, obesity, pregnancy, bowel obstruction, acute pancreatitis, ….)
- Respiratory disease with low compliance and/or high resistance.
- Patient position or surgery limiting airway access.
- upper airway pathology (infection, hematoma, cyst, ….)
LMA Sizing
3 = 30-50kg
4 = 50-70 kg
5 = 70-100kg
