![Figure 5. Effect of epinephrine concentration on the duration of effective block for thermal nociception (DEB-TN) from 3 [micro sign]g tetrodotoxin. 55 [micro sign]M = 1:100,000 epinephrine. Values of DEB-TN are mean +/- SD. The probability values result from t tests comparing the DEB-TN of tetrodotoxin combined with various epinephrine concentrations with tetrodotoxin combined with 55 [micro sign]M epinephrine. Epinephrine concentrations as low as 1.1 [micro sign]M (1:5,000,000) prolonged the DEB-TN.](https://asa2.silverchair-cdn.com/asa2/content_public/journal/anesthesiology/89/1/10.1097_00000542-199807000-00019/2/19ff5.png?Expires=1716510045&Signature=vGPMe9ID6uwgGDMJGxIMWc3OjoWeb1vNlo60v4EP9KUw6YQAGY2IIA3nOwzoQ5Kc5ml-K1dN3rQl29bPACDDc-3wAIgNHFrNPVe3m6b5FjjmDpxL1dWkblNAhDB-vTJGY2AhxlYar5bZI5BfxUjQVpMobGhWWaq5mYB94QjQXbI6MeW1gz5awYFPAwiqhTAs6AGHPgwoCA0jL6XHxU0iCrf36RaAE30wnuhJYmtRPP3m353-fJSbRLeE0uF6fuOXuq4yzVIZKUbZiMAtbeqp3Q07D1yW8SQ4JKMHfo7UgJ97hums6v7vJJmsnM7I3Ur0e1AgtWkzZL~GAUQuFVekBw__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
Figure 5. Effect of epinephrine concentration on the duration of effective block for thermal nociception (DEB-TN) from 3 [micro sign]g tetrodotoxin. 55 [micro sign]M = 1:100,000 epinephrine. Values of DEB-TN are mean +/- SD. The probability values result from t tests comparing the DEB-TN of tetrodotoxin combined with various epinephrine concentrations with tetrodotoxin combined with 55 [micro sign]M epinephrine. Epinephrine concentrations as low as 1.1 [micro sign]M (1:5,000,000) prolonged the DEB-TN.
