Peripheral Nerve Block
Colorado Pain Management in Aurora, Colorado Springs, Loveland & More
The peripheral nerve block is used to provide anesthesia to patients undergoing
certain surgeries, and it is often used to treat pain of an extremity.
This procedure can be done in the outpatient setting, and is considered
a safe and effective option for pain management.
How does the peripheral nerve block work?
The peripheral nerve block works by injecting an anesthetic near a nerve
or nerve bundle, which control(s) sensation and movement of an extremity.
The block can also be used for surgeries around the neck or groin region.
What are the benefits of using a peripheral nerve block?
The peripheral nerve block is an alternative to general anesthesia and
central nerve blocks. For some patients with serious medical issues, the
peripheral nerve block is a safe choice for analgesia. The block restricts
pain in one extremity, and offers long-term pain control. This treatment
also reduces opioid medication use, and has few side effects and complications.
What medications are used during the procedure?
No single medication is recommended. However, most peripheral nerve blocks
are done using bupivacaine or lidocaine. For longer duration of pain relief,
a corticosteroid may be added.
How do I prepare for the peripheral nerve block procedure?
When you visit the pain management specialist, he will ask you questions
about your condition, learn more about your medical history, and conduct
a thorough exam. If the doctor decides the block will work for you, he
reviews the procedure risks and benefits, and has you sign a paper of
informed consent. Because a sedative is used, do not eat/drink after midnight
the night before your procedure, and arrange to have transportation home.
How is the peripheral nerve block done?
After the nurse had you change into a procedure gown, an IV line is placed
in your hand. Monitoring devices are used to check blood pressure, heart
rate, and oxygen level. You are positioned on your back on the table,
and a sedative is given. After the thigh/groin region is cleaned with
an antiseptic. The procedure needle is guided into the skin, which is
verified using real-time x-ray. A catheter can be left in for a continuous
block/infusion, should more medication be needed, or if the patient is
to remain in the hospital. If a simple block is done, the medication is
injected onto the nerve, the needle is withdrawn, and a bandage is applied.
What can I expect after the peripheral nerve block?
The incidence of complications is rare. However, around 1% of patients
report some tingling sensations to the extremity that was blocked. When
you awake from sedation, expect to be groggy and a bit dizzy. The nurse
monitors your condition for around an hour before you go home. We recommend
you rest for 2-3 days following the procedure. Pain at the injection site
can occur, but is usually minimal.
Is the peripheral nerve block effective?
According to a recent study, dexamethasone was added to bupivacaine to
achieve a nerve block in several patients. In the observational study,
patients had a reduction of pain and longer pain relief with this block
compared to bupivacaine alone. In a recent study, buprenorphine was found
to prolong sciatic and brachial plexus nerve blocks by around 12 hours.
In addition, clonidine and dexmedetomidine had a modest effect when used
in nerve blocks.