TURNEY, MC ASLAN, AND COWLEY

BTPS = body temperature and pressure, saturated gas STPD = standard temperature and pressure, dry gas T'C. = ambient temperature in degrees centigrade

Subscript max = maximum Subscript s = corrected to STPD

Suffix A = alveolar Suffix a = arterial Suffix B = barometric pressure Suffix = mean capillary Suffix D = dead space Suffix Suffix E = expiratory Suffix EE = end-expiratory Suffix I = inspiratory Suffix = end-inspiratory Suffix T = tidal gas Suffix t = duration of mean signal Suffix v = volume Suffix V = mean mixed venous QB/QT = intrapulmonary shunt fraction of the total cardiac output QT = total cardiac output

= dead space of measuring device

NOTICE FROM THE AMERICAN BOARD OF THORACIC SURGERY

The American Board of Thoracic Surgery, with assistance from the National Board of Medical Examiners, is currently preparing an objective written examina- tion and a restructured, objective oral examination to be given annually. The first examination will be held on September 28, 29, and 30, 1972, in San Fran- cisco, California. (Please note the new change in date.) The written portion will consist of a 200-question multiple choice examination and, together with the oral examination, will determine the total grade given the candidate. The closing date for registration for the September, 1972, examination is June 1, 1972.

The last semiannual examination, consisting of an oral clinical examination and an interpretive data examination (which combines roentgenogram interpreta- tion, pathology, and interpretation of cardiac catheterization data) will be given in April, 1972.

242 THE ANNALS OF THORACIC SURGERY