Regional Final Flashcards
Indications for Intercostal Block
- thoracic or upper abdominal surgery
- rib fractures
- breast surgery
Overview of Intercostal nerve blocks
- need to perform blockade of two dermatomes above incision and two levels below
- does not block visceral pain
- does not provide adequate coverage for intraoperative anesthesia
Landmarks for Intercostal block
angle of rib
(6-8 cm lateral to the spinous process)
Risks of Intercostal block
- Pneumothorax
- local anesthetic toxicity
- hematoma
- nerve damage
- epidural anesthesia
Technique for Paravertebral
2.5 cm lateral to midline
longest lumbar transverse process
L3
Trigeminal Nerve
[overview]
5th CN providing sensory innervation to face
- preganglionic fibers exit brainstem and synapse with trigemincal (gasserian) ganglion
- post-ganglionic fibers exit to form:
- V1 - opthalmic
- V2 - maxillary
- V3 - Mandibular
most common trigeminal nerves to have pain
V2 (maxillary) and V3 (mandibular)
carbamezapine
treats seizures and nerve pain
(especially trigeminal neuralgia)
Complications of Trigeminal Nerve Block
- intravascular injection (carotid)
- persistent paresthesias
- total spinal
- profound facial numbness
indications for Supraorbital block
lower forehead or upper eyelid
(blepheroplasty)
amount of local anesthetic in Supraorbital block
2 - 3 mL
injection of LA inside the cone of the eye provides anesthesia and akinesia of ___ and ____
globe and extraocular muscles
Oculocardiac Reflex
[afferent]
trigeminal
oculocardiac reflex
[efferent]
vagus nerve
increase in parasympathetic tone
steps in oculocardiac reflex
pressure on eyeball
ciliary nerves and ciliary ganglion
gasserian ganglion
trigeminal sensory nucleus in 4th ventricle
vagus nerve
increase parasympathetic tone and bradycardia
highest incidence of oculocardiac reflex
children
Treatment of oculocardiac reflex
removal of stimulus
anti-cholinergics
check depth of anesthesia
sensory anterior 2/3 of tongue
trigeminal
sensory above vocal cords
internal branch of superior laryngeal nerve
(vagus)
sensory posterior 1/3 of tongue
glossopharyngeal
sensory below vocal cords
recurrent laryngeal nerve
The recurrent laryngeal nerve innervates all muscles of the pharynx except _____
cricothyroid muscle
innervation of cricothyroid muscle
external branch of the superior laryngeal nerve
Transtracheal block indication
blunts gag reflex
nerves involved in gag reflex
afferent (CN IX) and efferent (CN X)
nerves in lumbar plexus
T-12 to L-4
nerves in femoral branch
L2 - L4
1= Femoral Artery
2= Femoral Nerve
3= Femoral Vein
4= Anterior Superior Iliac Spine
5= Inguinal Ligament
6=Sartorius
}In the PACU your patient complains of knee pain after a Total Knee Arthroplasty. A continuous femoral nerve block has already been placed. What do you do?
adductor canal block
Boundaries of Adductor canal block
sartorius
vastus medialis
adductur longus and magnus
Advantage of adductor canal block over femoral
sensory block only
no motor fibers involved; good for athletes that need to recover quickly