To the Editor.—
As an anesthesiologist, I found the response by Carl C. Hug, Jr, MD, PhD (242:1299, 1979), regarding the status of low-dose halothane as part of a "balanced anesthetic" to be interesting and comprehensive. However, the parenthetic allusion to "MAC" as "maximum allowable concentration" was disturbing. It should be noted that Eger1 defines MAC as the "minimum alveolar concentration of anesthetic at one atmosphere that produces immobility in 50 percent of those patients or animals exposed to a noxious stimulus."
McGoldrick KE. Halothane in Balanced Anesthesia. JAMA. 1980;243(14):1423. doi:10.1001/jama.1980.03300400013014