Assignment 1 - Blood Gas Calculations Homework

BE‑374, Spring '06, Dr. C. S. Tritt

Due: 3/27

 

1.                  Calculate the amount of oxygen consumed by an organ when 0.35 l/min of blood having a hemoglobin concentration of 14 g/dl enters the organ at 98% saturation and leaves it at 74% saturation. Express your answer in ml (@STP)/min and mM/s.  You may neglect changes in the amount of dissolved oxygen.

 

2.                  Use the Henderson‑Hasselbalch equation (not my blood gas programs) to calculate the concentration of bicarbonate (HCO₃^–) in a solution at 37°C with a P_CO2 of 45 mmHg and a pH of 7.40.  Show your work.

 

For the next two problems use my blood gas program to find the patient’s base excess and proceed from there.

 

3.                  What is the acid-base status of a patient in the following state P_O2 = 100 mm Hg, P_CO2 = 28.0 mm Hg, pH = 7.319, Hct = 40.0%, [Hb] = 15.0 g/dl and T = 37.0º?

 

4.                  What is the acid-base status of a patient in the following state P_O2 = 100 mm Hg, P_CO2 = 68.0 mm Hg, pH = 7.250, Hct = 40.0%, [Hb] = 15.0 g/dl and T = 37.0º?