Abstract
New studies continue to show the increased risk of morbidity and mortality that is associated with poor or ineffective pain control in postoperative settings. The appropriate technical selection must consider several key factors in addition to the patient’s comorbidities and type of surgery being performed. Furthermore, complications related to neural blockade are rare but not completely avoidable. This chapter reviews various agents and techniques that can be used by physicians utilizing a multimodal analgesic model.
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Acknowledgment
We wish to thank Dr. Ralf E. Gebhard and Dr. Andres Missair for their significant contributions to the first edition of this chapter.
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Review Questions
Review Questions
-
1.
What fraction of the local anesthetic bolus will travel cephalad in a lumbar epidural catheter placed at the L4–L5 interspace in a spontaneously ventilating patient?
-
(a)
½
-
(b)
1/3
-
(c)
2/3
-
(d)
¾
-
(a)
-
2.
How soon after a patient receives a prophylactic dose of Lovenox is it considered safe to place an epidural?
-
(a)
2 h
-
(b)
24 h
-
(c)
12 h
-
(d)
No need to wait
-
(a)
-
3.
What is the maximum INR that is considered safe for epidural placement?
-
(a)
1
-
(b)
2
-
(c)
1.5
-
(d)
<1.5
-
(a)
-
4.
The most important factor in determining anesthetic level after an epidural bolus is:
-
(a)
Concentration of local anesthetic
-
(b)
Volume of local anesthetic
-
(c)
Total dose of anesthetic
-
(d)
Patient position
-
(a)
-
5.
The most important factor in determining the anesthetic level after a single-shot spinal is:
-
(a)
Volume of local anesthetic
-
(b)
Concentration of local anesthetic
-
(c)
Total dose of anesthetic
-
(d)
Baricity of local anesthetic
-
(a)
-
6.
What nerve is typically spared after a single-shot interscalene block?
-
(a)
Median nerve
-
(b)
Musculocutaneous nerve
-
(c)
Radial nerve
-
(d)
Ulnar nerve
-
(a)
-
7.
What steps are taken to avoid intravascular injection during nerve blockade?
-
(a)
Frequent aspiration before injection
-
(b)
Slow injection
-
(c)
Avoidance of injections when resistance is encountered
-
(d)
Adding epinephrine to the local anesthetic
-
(a)
-
8.
What nerve must be blocked separately to ensure complete neural blockade during an axillary block?
-
(a)
Median nerve
-
(b)
Ulnar nerve
-
(c)
Radial nerve
-
(d)
Musculocutaneous nerve
-
(a)
-
9.
A patient received an axillary single-shot nerve block for hand surgery and is complaining of tourniquet pain in the operative arm. Which nerve was missed?
-
(a)
Intercostobrachial
-
(b)
Musculocutaneous
-
(c)
Supraclavicular
-
(d)
Ulnar
-
(a)
-
10.
The Bezold–Jarisch reflex is associated with which nerve block?
-
(a)
Axillary
-
(b)
Infraclavicular
-
(c)
Interscalene
-
(d)
Interscalene in the sitting position
-
(a)
-
11.
Which local anesthetic has the potential for greatest cardiotoxicity if the dosage is held equal?
-
(a)
Lidocaine
-
(b)
Mepivacaine
-
(c)
Ropivacaine
-
(d)
Bupivacaine
-
(a)
-
12.
Which opioid has the lowest incidence of respiratory depression when used for IV PCA?
-
(a)
Fentanyl
-
(b)
Meperidine
-
(c)
Hydromorphone
-
(d)
Morphine
-
(a)
-
13.
When switching from IV to PO dosing, what conversion factor is required for hydromorphone?
-
(a)
2×
-
(b)
3×
-
(c)
4×
-
(d)
5×
-
(a)
-
14.
Which non-opioid adjuvant exhibits synergy when coadministered with a fentanyl PCA?
-
(a)
Aspirin
-
(b)
Acetaminophen
-
(c)
Dexmedetomidine
-
(d)
Clonidine
-
(a)
-
15.
Ketamine can be administered through which routes?
-
(a)
IV
-
(b)
IM
-
(c)
Epidural
-
(d)
All of the above
-
(a)
Answers
-
1.
c
-
2.
c
-
3.
d
-
4.
b
-
5.
d
-
6.
d
-
7.
a
-
8.
d
-
9.
a
-
10.
d
-
11.
a
-
12.
a
-
13.
d
-
14.
d
-
15.
d
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Kaye, A.D. et al. (2018). Acute Pain Management. In: Kaye, A., Urman, R., Vadivelu, N. (eds) Essentials of Regional Anesthesia. Springer, Cham. https://doi.org/10.1007/978-3-319-74838-2_34
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DOI: https://doi.org/10.1007/978-3-319-74838-2_34
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