bier block

BIER BLOCK

Developing Countries Regional Anesthesia Lecture Series

Daniel D. Moos CRNA, Ed.D. U.S.A. [email protected] Lecture 16

Soli Deo Gloria

mailto:[email protected]

Disclaimer

Every effort was made to ensure that material and information contained in this presentation are correct and up-to-date. The author can not accept liability/responsibility from errors that may occur from the use of this information. It is up to each clinician to ensure that they provide safe anesthetic care to their patients.

Advantages

Easy to administer Rapid recovery Rapid onset Muscle relaxation

Type of surgery

Open procedures of the hand or lower arm

Closed reductions of the hand or lower arm

Limitation

Time! Ideal for procedures lasting 40-60

minutes Maximum time limit is 90 minutes Tourniquet pain generally starts after 20-

30 minutes

Contraindications

Reynaud’s disease Homozygous sickle cell disease Crush injuries Young Children Must have a reliable/operative

tourniquet! If this can not be guaranteed then this technique should not be used due to risk of toxicity!

Mechanism of Action

Not clearly understood. Local anesthetics, ischemia, asphyxia,

hypothermia, and acidosis all may play a role.

Mechanism of Action

Adapted from Rosenberg and Heavner, 1985

Equipment

Operative and reliable double toruniquet Running IV in non-operative arm Resuscitation equipment Eschmark bandage

Local Anesthetic Choice

0.5% lidocaine or 0.5% prilocaine Dose is 3 mg/kg for either NEVER USE EPI CONTAINING SOLUTIONS Complication of prilocaine is

methemoglobinemia in doses of > 10 mg/kg

Treat with 1-2 mg/kg of 1% methylene blue given over 5 minutes

Technique

Technique

IV catheter in operative arm as distally as possible

Technique Double tourniquet on the operative arm.

Proximal Cuff

Distal Cuff

Technique

Have patient hold arm up.

Use Eschmark to exsanguinate the arm

Exsanguinate the arm from distal to proximal.

Inflate the proximal tourniquet to 150 mmHg over the patients systolic pressure

Proximal Cuff

Distal Cuff

Confirm the absence of a radial pulse

Inject your local (0.5% lidocaine or prilocaine in a dose of 3 mg/kg)

Remove IV catheter, hold pressure and have OR staff prep arm. Onset of anesthesia should occur in 5 minutes

When the patient complains of pain you can inflate the distal tourniquet and then deflate the proximal tourniquet

Proximal Cuff

Distal Cuff 1st

2nd

Minimum time for tourniquet inflation

The tourniquet should be up for at least 25 minutes…releasing it before this may result in toxicity

Releasing the tourniquet in cyclic deflations (10 second intervals) will decrease peak levels of local anesthetic

Complications

Tourniquet discomfort Rapid return of sensation after

tourniquet release and subsequent surgical pain

Toxic reactions from malfunctioning tourniquets or deflating the tourniquet prior to the 25 minute limit

Bier Block Study

10 patients were enrolled in this prospective study.

The aim was to study the onset, the order of sensory anesthesia, and plasma serum levels of lidocaine were measured at 1,5,10,15,20,25,30,45,60, and 90 minutes after the tourniquet was released.

The tourniquet was elevated for a minimum of 30 minutes prior to release.

Simon, Gielen, Vree, Booij. Disposition of lignocaine for intravenous regional anaesthesia during day-case surgery. European Journal of Anaesthesiology. Pp 32-37. 15(1), 2006.

Bier Block Study Results

Mean onset of action for lidocaine was 11.2 minutes (+/- 5.1 minutes).

No fixed sequence of anesthesia (radial, median, and ulnar distributions).

No patient exhibited toxicity.


Bier Block Study Results

8 of the 10 patients reached the maximum plasma concentrations of lidocaine 1 minute after tourniquet release.

2 of the 10 patients had a slow release and peak in concentration of lidocaine.

Delayed release of lidocaine may be explained by a greater degree of absorption into tissue of the arm.


Local Anesthetic Toxicity

Signs and symptoms may include nausea, vomiting, dizziness, ringing of the ears (tinnitus), funny sensation around the mouth, loss of consciousness, and seizures.

Local Anesthetic Toxicity

Use the A, B, C’s for the management of local anesthetic toxicity. A= airway. Maintain a patent airway, administer 100% oxygen. B= breathing. May need to assist the patient with positive

pressure ventilation or intubation. C= circulation. Check for a pulse. If no pulse, initiate CPR. Seizures. Diazepam in doses of 5 mg, or alternatively sodium

pentothal in doses of 50-200 mg will decrease or terminate seizures.

Hypotension. Treat with ephedrine (typically 5 mg) IV, open up intravenous fluids, place the patient in a head down position (Trendelenburg). If hypotension is refractory to ephedrine, treat the patient with epinephrine (5-10 mcg). Repeat and escalate the dose as necessary.

The use of lipids in the treatment of local anesthetic toxicity has shown promise. There are currently no established methods and research continues. For updates please refer to http://lipidrescue.squarespace.com.

References Burkard J, Lee Olson R., Vacchiano CA. Regional Anesthesia. In Nurse Anesthesia 3rd

edition. Nagelhout, JJ & Zaglaniczny KL ed. Pages 977-1030.

Rosenberg, P.H., Heavner, J.E. (1985). Multiple and complementary mechanisms

produce analgesia during intravenous regional anesthesia. Anesthesiology, 62, 840-842.

Morgan, G.E., Mikhail, M.S., Murray, M.J. (2006). The practice of anesthesiology. In

G.E. Morgan, M.S. Mikhail, M.J. Murray (editors) Clinical Anesthesiology, 4th edition. New York: Lange Medical Books/McGraw-Hill Medical Publishing Division.

Morgan, G.E. & Mikhail, M. (2006). Peripheral nerve blocks. In G.E. Morgan et al

Clinical Anesthesiology, 4th edition. New York: Lange Medical Books.

Wedel, D.J. & Horlocker, T.T. Nerve blocks. In Miller’s Anesthesia 6th edtion. Miller,

RD ed. Pages 1685-1715. Elsevier, Philadelphia, Penn. 2005.

Wedel, D.J. & Horlocker, T.T. (2008). Peripheral nerve blocks. In D.E. Longnecker et al (eds) Anesthesiology. New York: McGraw-Hill Medical.

bier block

Documents