Exam 3 blocks (study guide and jeapordy) Flashcards
What nerve block is best for shoulder surgery
interscalene
What nerve block is commonly used for total knee
Adductor
Blocking above the clavicle: as little as ____ cc of air can lead to seizures
0.5
5 nerves that distribute parasympathetic fibers to visera
Esophageal
Pharyngeal
Cardiac
Pulmonary
Celiac
What are the anatomical landmarks for the superficial cervical plexus block
Sternoclidomastoid
Middle sclaene
Brachial plexus
anterior scalene
What can occur with Facial Illiaca nerve block and why
Urinary retention
Can migrate to pelvic plexus
Commonly used amides
Lidocaine
Ropivacaine
Mepivacaine
Bupivacaine
Amides are metabolized by
Cytochrome P450 in the liver
Esters are metabolized by
Plasma cholinesterase
Block lasting longer than normal with expose to pesticides - why?
Block is an Ester (Chloroprocaine)
pesticides = decrease in plasa cholinesterase
Dexmedetomidine in a block
Contraindicated in cardiac blocks/problems!
Metabolites of morphine
M6G
M3G
Which metabolite of morphine is an active metabolite
M6G
Adductor block distribution innervates
Branches of the femoral nerve:
Knee
Medial malleolus
Medial large toe
Supraclavicular block for
Upper arm, elbow, wrist, hand
*usually not shoulder
Infraclavicular block
Brachial plexus; blocks below mid humerus
Femoral block motor innervates to
quads, sartorius, pecfineus
Femoral block sensory innervation
anterior thigh, knee, medial aspect of lower extremety
terminates at saphenous neve
Interscalene block - how does it cause Horner’s syndrome
blocks stellate ganglion (C7)
Hypotensive bradycardia episode in surgery: 3 causes
- Position (sitting)
- Interscalene block
- Epi used in the block
Objective of interscalene block
C5-7 roots of brachial plexus between anterior and scalene muscles
Transducer position during interscalne block
Transverse 3-4 cm above clavicle
Landmarks for interscalene block
- Cricoid cartiladge
- Lateral border calvicular head of sternocleidomastoid
- Clavicle