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Anesthetic Volume for Ultrasound-Guided andldquo;Double Bubbleandrdquo; Infraclavicular Block: Comparison of Ropivacaine 0.75% 30ml Vs 35ml. | OMICS International | Abstract
ISSN: 2155-6148

Journal of Anesthesia & Clinical Research
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Research Article

Anesthetic Volume for Ultrasound-Guided “Double Bubble” Infraclavicular Block: Comparison of Ropivacaine 0.75% 30ml Vs 35ml.

Alessandro Di Filippo1*, Adele Molinaro1, Amer Georges Iskandar1, Rossella Deodati2, Christian Visco2, Alberto Boccaccini2, Maria Consolata Campolo2 and Angelo Raffaele De Gaudio1

1Department of Critical Care, Section of Anesthesia, University of Florence, Italy

2Department of Orthopedics, Units of Anesthesia and Intensive Care, Careggi Teaching Hospital, Italy

*Corresponding Author:
Alessandro Di Filippo
Department of Critical Care
Section of Anaesthesia c/o Careggi Teaching Hospital
University of Florence, Italy
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+39055434807
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E-mail: [email protected]

Received date: October 05, 2012; Accepted date: October 23, 2012; Published date: October 30, 2012

Citation: Filippo AD, Molinaro A, Iskandar AG, Deodati R, Visco C, et al. (2012) Anesthetic Volume for Ultrasound-Guided “Double Bubble” Infraclavicular Block: Comparison of Ropivacaine 0.75% 30ml Vs 35ml. J Anesth Clin Res 3:253. doi: 10.4172/2155-6148.1000253

Copyright: © 2012 Filippo AD, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

For an UltraSound guided Infraclavicular Block, a non-inferiority randomized study was conducted comparing two volumes of ropivacaine 0.75%: 35 ml vs 30ml. Fifty 18-70 years old patients undergoing upper limb surgery, ASA I-II were enrolled. Exclusion criteria included existing neurologic disease, coagulopathy, allergy, pregnancy, previous surgery in clavicular region, BMI more than 30 kg/m2 or patients unable to give written consent. Using US guidance, a 22 gauge/80 mm SonoPlex needle (Pajunk®) was advanced until the tip was located dorsally to the artery at a 6-o’clock position. Correct placement was ensuring by a “double bubble” sign. The block was performed by delivering ropivacaine 0.75% via an infusion pump (Alaris® PK) at 600 ml/h.
The patients were randomly allocated to receive 30 or 35 ml of anesthetic. Subsequently, the brachial plexus block was evaluated after 30 minutes according to a 3-point scale for sensitive and motor blockade in each nerve field (maximum 16 points). Block was successful if a minimal score of 14 points was achieved. Student’s T test for continuous variables and Chi-Square test for qualitative variables were used. Both groups were homogeneous in terms of anthropometric data. The Block Success rate was 22/25 (88%) regardless of the group of origin (G30 or G35) (p=NS). our data showed that for an Infraclavicular Block achieved by a single injection of ropivacaine 0.75% using the “double bubble” technique a volume of 30 ml is equivalent to 35 ml.

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