Question

9. The respiratory therapist is performing a p story therapist is performing a pre-operative evaluation on Ms. Lawrence prior to her ary artery bypass graft (CABG) surgery. Ms. Lawrence is a 49 y/o female who weighs 136 lbs. The respiratory therapist finds the patient has a tidal volume of 800 ml and a respiratory rate of 12 bpm. Based on this data, the respiratory therapist should evaluate this patient's alveolar minute ventilation to be approximately: a. 10.51 Lpm b. 7.97 Lpm C. 9.60 Lpm d. 1.63 Lpm

Answer 1

9.alvelar minute ventilation is the quantity of air that enters and goes out frm the lungs.it is calculated by:

( Tidal vol -dead space)×respiratpry rate

( 800-150)×12

=7800 ml/min=7.9l/min

Here dead space denotes anatomical dead space which 150ml for adult human beings.