Regional Exams Flashcards Preview

SUM '20 Final Exams Prep > Regional Exams > Flashcards

Flashcards in Regional Exams Deck (195)
Loading flashcards...
1

When using a nerve stimulator, the ____ electrode is placed on the patient and then _____ electrode is placed on the needle.

positive, negative

2

All of the following is true regarding a Pediatric Caudal blocks EXCEPT:

1.0ml/kg of 2% lidocaine

(correct dosing: Lidocaine 1.5-2% 15-20ml for LL or perineum block; max dosing 5mg/kg or with epi 7mg/kg; bupivacaine 3mg/kg)

Peds: 0.5-1.0ml/kg of .0125-0.25% bupivacaine (or ropivacaine) with or w/o epi --- not lidocaine

3

WHich of the following blocks has the largest depth in regards to ultrasound

Anterior approach to the sciatic nerve (>10.0cm)

4

Which of the following is an absolute contraindication to neuraxial anesthesia (choose 2)

Bleeding diathesis
Increased intracranial pressure

5

How much LA to give with epidurals per segment

1-2 ml

6

Which of the following would be seen with Lidocaine toxicity level of 20mcg/ml

apnea

7

Which of the following are esters(i):

Procaine
Chloroprocaine

8

Which of the following is a normal Dibucaine number

80

9

Specific Receptor theory: (3)

-LA act by binding to specific receptors on Na channel
-Activation is direct, no change in cell membrane permeability
-Specific receptor site for LA in the Na channel which eliminates permeability of Na ions

10

Which of the following is NOT recommended in the treatment of PDPH:

Early ambulation

11

Which of the following is a safe dose in Spinals

20 mcg Fentanyl

12

What membrane is punctured during caudal blocks

sacrococcygeal membrane

13

Which local anesthetic has the fastest onset and pka around 9.1

Chloroprocaine

14

Which of the following are least sensitive to action of LA?

C Fibers

15

2-3 nodes of Ranvier must be blocked to stop nerve conduction is true for what?

Myelinated axons

16

Relative Refractory period is..

Period where a larger than normal stimulus can elicit an action potential

17

Lateral Rectus is controlled by what cranial nerve?

Abducens (IV)

*LR6 SO4 R3*

18

Nonionized form of a weak base is the ____ and the ionized form is the _____

Base, conjugate acid

19

When using peripheral nerve stimulation, which is correct?

As needle approaches the sheath, continue to decrease the mA to maintain desired muscle response

20

Which of the following is a landmark in the use of caudal blocks represented by a depression

Sacral hiatus

21

Which of the following will be lost LAST in spinals:

Motor

*"ATM":
ATP - autonomic, temp, pain
TP - touch, pressure
MVP - motor, vibratory, proprioception

22

Represents highest to lowest blood flows affecting duration of action (not sure if that was the question)

Intraarterial/intravenous > tracheal> intercostal> caudal> paracervical > epidural > brachial plexus> sciatic/subarachnoid/femoral> subq

23

Which of the following is true regarding metabolism

Mepivacaine > bupivacaine

[P > L> M > R > B]

24

Which is true regarding fetal ion trapping
A. The lower the fetal pka the greater the amount of LA
B. The higher the fetal pka the greater the amount of LA form in the fetus
C. The lower the fetal ph the greater the amount of LA form in the fetus
D. The lower the fetal pka the greater the amount of LA form in. the fetus

C. The lower the fetal ph the greater the amount of LA form in the fetus

25

Sodium Ceto has a pKa of _8.5__ and is injected into a patient with a pH of 7.4. Which of the following is true:

more/less than 50% is ionized/unionized..

More than 50% unionized (weak acids bind to positive ions, making Sodium Ceto a weak acid)

26

Which of the following is true regarding the inactivation of the sodium channel with LA:

The ionized form is responsible for binding to the receptor in the sodium channel

27

All of the following are true regarding neuraxial blockade in the setting of anticoagulant therapy EXCEPT?

Prophylactic minidose of subcutaneous heparin is a contraindication

28

Where do local anesthetics work after injection to the intrathecal space?

Spinal nerve roots
Spinal cord

29

What area is the largest space for spinal anesthesia?

L5-S1

30

What is the most influential factor for spinal anesthesia?

Dosage of LA