Cath: Double Balloon Size Selection

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(1) Dr. Rao's book p. 49 (Wiley-Liss, New York, 1993)

(2) Table is from Dr. Jim Lock's book 2nd ed. p. 154 (Kluwer Academic Publishers, Boston 2000)

 (3) Further simplified formula:  (Narang R, et al. Cardiology 1997;88:271-276)
Effective Balloon Diameter = 0.82 (D1 + D2)