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AMBULATORY ANESTHESIA

Fast-Tracking After Immersion Lithotripsy: General Anesthesia Versus Monitored Anesthesia Care

Department of Anesthesiology and Pain Management, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas

Address correspondence and reprint requests to Dr. Paul F. White, Department of Anesthesiology and Pain Management, University of Texas Southwestern Medical Center at Dallas, 5161 Harry Hines Blvd., CS2.126, Dallas, TX 75235-9068. Address e-mail to paul.white{at}email.swmed.edu

Both monitored anesthesia care (MAC) and general anesthesia (GA) offer advantages over epidural anesthesia for immersion lithotripsy. We compared propofol-based MAC and desflurane-based GA techniques for outpatient lithotripsy. After receiving midazolam 2 mg IV, 100 subjects were randomly assigned to one of two anesthetic treatment groups. In the MAC group, propofol 50–100 µg · kg^-1 · min^-1 IV was titrated to maintain an observer’s assessment of alertness/sedation score of 2–3 (5 = awake/alert to 1 = asleep). Remifentanil 0.05 µg · kg^-1 · min^-1 IV supplemented with 0.125 µg/kg IV boluses, was administered for pain control. In the GA group, anesthesia was induced with propofol 1.5 mg/kg IV and remifentanil 0.125 µg/kg IV and maintained with desflurane (2%–4% inspired) and nitrous oxide (60%). Tachypnea (respiratory rate >20 breaths/min) was treated with remifentanil 0.125 µg/kg IV boluses. In the GA group, droperidol (0.625 mg IV) was administered as a prophylactic antiemetic. Recovery times and postoperative side effects were assessed up to 24 h after the procedure. Compared with MAC, the use of GA reduced the opioid requirement and decreased movements and episodes of desaturation (<90%) during the procedure. Although the GA group took longer to return to an observer’s assessment of alertness/sedation score of 5, discharge times were similar in both groups. We conclude that GA can provide better conditions for outpatient immersion lithotripsy than MAC sedation without delaying discharge.

Implications: A desflurane-based general anesthetic technique using the cuffed oropharyngeal airway device was found to be a highly acceptable alternative to propofol-based monitored anesthesia care sedation for outpatient immersion lithotripsy.

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				H. J. Medina, E. M. Galvin, M. Dirckx, P. Banwarie, J. F. H. Ubben, F. J. Zijlstra, J. Klein, and S. J. C. Verbrugge Remifentanil as a Single Drug for Extracorporeal Shock Wave Lithotripsy: A Comparison of Infusion Doses in Terms of Analgesic Potency and Side Effects Anesth. Analg., August 1, 2005; 101(2): 365 - 370. [Abstract] [Full Text] [PDF]

				H. S. Joo, W. J. Perks, M. T. Kataoka, L. Errett, K. Pace, and R. J. Honey A Comparison of Patient-Controlled Sedation Using Either Remifentanil or Remifentanil-Propofol for Shock Wave Lithotripsy Anesth. Analg., November 1, 2001; 93(5): 1227 - 1232. [Abstract] [Full Text] [PDF]

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