Transthoracic compliance formula: (A) C = Vt x RR /PEEP, (B) C= V/Alv p - atmospheric pressure, (C) C = Vt/Pplt - PEEP, (D) C = Vt/Pk - Pplt
Answer is B. Transthoracic pressure Transthoracic compliance : Alveolar pressure - Atmospheric pressure