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  • Abstract
  • MATERIALS AND METHODS
  • RESULTS
  • DISCUSSION
  • REFERENCES
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Abstract

Alterations in arterial PaCO2 can influence local anesthetic toxicity. The objective of this study was to evaluate the effect of stress-induced changes in PaCO2 and PaO2 on the seizure threshold of lidocaine and articaine. Lidocaine (2% with 1 ∶ 100,000 epinephrine) or articaine (4% with 1 ∶ 100,000 epinephrine) was administered intravenously under rest or stress conditions to 36 rats separated into 4 groups. Propranolol and prazosin were administered preoperatively to minimize cardiovascular effects of epinephrine. Mean arterial pressure (MAP), heart rate (HR), and arterial pH, PaCO2, and PaO2 were measured. Results showed no differences in MAP, HR, or pH. Stress significantly increased the latency period for the first tonic-clonic seizure induced by a toxic dose of both lidocaine and articaine (P < .05). Seizures were brought on more rapidly by articaine. No significant difference between toxic doses of lidocaine and articaine was noted. Stress raised the seizure threshold dose for both drugs and significantly (P < .01) increased arterial PaO2 from 94.0 ± 1.90 mm Hg to 113.0 ± 2.20 mm Hg, and reduced PaCO2 from 36.0 ± 0.77 mm Hg to 27.0 ± 0.98 mm Hg. In conclusion, reduction in PaCO2 and/or increase in PaO2 raised the seizure threshold of lidocaine and articaine. This study also confirmed that lidocaine and articaine have equipotent central nervous system toxicity.

Keywords: Lidocaine; Articaine; Local anesthetic toxicity
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Copyright: 2010 by the American Dental Society of Anesthesiology
Citations

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Article Contents

Perioperative Management of a Patient With Idiopathic Pulmonary Hypertension and a History of Syncope: A Case Report

Aiji Sato (Boku) DDS, PhD;,
 MinHye So MD, PhD;,
 Kazuma Fujikake MD, PhD;,
 Motoshi Tanaka MD;,
 Yuji Kamimura MD, PhD;,
 Haruko Ota MD, PhD;,
 Tomomi Mizutani DDS,
 Kenichiro Ishibashi DDS, PhD;,
 Yasuyuki Shibuya DDS, PhD;, and
 Kazuya Sobue MD, PhD

How Safe Is Anesthesia Management by Dentist Anesthesiologists? The Need for an International Collaborative Study on the Safety of Anesthesia Management by Dentist Anesthesiologists

Takuro Sanuki DDS, PhD,
 Shota Tsukimoto DDS, PhD,
 Hidetaka Kuroda DDS, PhD,
 Uno Imaizumi DDS, PhD, and
 Naotaka Kishimoto DDS, PhD

General Anesthetic Management of a Patient With Spondyloepiphyseal Dysplasia Congenita Undergoing Palatoplasty Revision

Hiroka Hattori DDS,
 Aiji Sato (Boku) DDS, PhD,
 Mayuko Kanazawa DDS, PhD,
 Erika Harada DDS,
 Mami Asai DDS,
 Yuko Shikama DDS,
 Hiroko Kobayashi DDS,
 Makoto Hirohata DDS,
 Naoko Tachi DDS, PhD, and
 Masahiro Okuda MD, PhD
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