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Anesth Analg 2005;100:1166-1171
© 2005 International Anesthesia Research Society
doi: 10.1213/01.ANE.0000154443.68396.70


REGIONAL ANESTHESIA

Interscalene Brachial Plexus Block with Bupivacaine and Ropivacaine in Patients with Chronic Renal Failure: Diaphragmatic Excursion and Pulmonary Function Changes

Fatis Altintas, MD*, Funda Gumus, MD*, Guner Kaya, MD*, Ismail Mihmanli, MD{dagger}, Fatih Kantarci, MD{dagger}, Kamil Kaynak, MD{ddagger}, and M. Serif Cansever, MSc§

Departments of *Anesthesiology, {dagger}Radiology, {ddagger}Thoracic Surgery, and §Pediatrics, Metabolism Division Laboratory, Istanbul University Cerrahpasa Medical School, Istanbul, Turkey

Address correspondence and reprint requests to Fatis Altintas, MD, Nispetiye Cad Prof Sitesi A-2 Blok D 9, Etiler, Istanbul, Turkey. Address e-mail to fatisaltintas{at}hotmail.com.

In this randomized, double-blind study, we compared the anesthetic characteristics and pulmonary function changes of 0.33% bupivacaine and 0.33% ropivacaine used for interscalene brachial plexus (IBP) anesthesia in patients with chronic renal failure. Forty-two patients undergoing IBP anesthesia for creation of arteriovenous fistulas were randomly allocated to receive either 30 mL of 0.33% bupivacaine (Group B) or 0.33% ropivacaine (Group R). Block onset time, diaphragmatic excursion (ultrasonographic evaluation), and free plasma concentrations of bupivacaine and ropivacaine were evaluated. Negative motion or immobility of the ipsilateral hemidiaphragm and a decrease of >10 mm in positive motion were defined as diaphragmatic paresis. The pulmonary function variables were measured by bedside spirometry equipment. Seven patients needed supplemental local anesthetic, one with total spinal block; these patients were excluded from the study. The success rate was 80.9%. Block quality was similar in the two groups. Ipsilateral hemidiaphragmatic excursion was decreased in both groups compared with baseline values (P < 0.05). Diaphragmatic paresis was identified in 10 of 16 patients and 8 of 18 patients in Groups B and R, respectively (P > 0.05). Pulmonary function significantly decreased from baseline in both groups (forced vital capacity (FVC) 30%, forced expiratory volume at 1 second (FEV1) 32%, and peak expiratory flow (PEF) 31% in Group B and FVC 17%, FEV1 17%, and PEF 5% in Group R) (P < 0.001). The decreases in Group B were larger than those in Group R (P < 0.05). Three patients in Group B and one in Group R had mild respiratory problems (P > 0.05). Concentrations of bupivacaine and ropivacaine were below toxic levels rather than "normal range." We conclude that pulmonary function decreased more after IBP with 0.33% bupivacaine than with 0.33% ropivacaine.




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Lippincott, Williams & Wilkins Anesthesia & Analgesia® is published for the International Anesthesia Research Society® by Lippincott Williams & Wilkins with the assistance of Stanford University Libraries' HighWire Press®. Copyright 2006 by the International Anesthesia Research Society. Online ISSN: 1526-7598   Print ISSN: 0003-2999 HighWire Press
Copyright © 2005 by the International Anesthesia Research Society.