Concept explainers
To review:
The
Introduction:
The partial pressure of oxygen in the sea is about 100 mm Hg while that in a solution is equal to 3 mL O2/L of blood. Oxygen is carried by the blood in two forms, that is, the dissolved form and bound to Hb (hemoglobin).
Please refer to Clinical Application Case-2 for further information.
Explanation of Solution
The total oxygen content of arterial blood is denoted by
Putting the values of Hb as 15 g/dL,
Putting the values of Hb as 15 g/dL,
Total oxygen delivery can be calculated by using the following formula:
Putting the values of QT as 3.83 and
Putting the values of QT as 3.1 and
The difference between
The best PEEP was 5 cm
Therefore, it can be concluded that the best PEEP was 5 cm
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Chapter 15 Solutions
Cardiopulmonary Anatomy & Physiology
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- Which of the following forced expiratory measurements reflects the status of medium-sized to small-sized airways? A. FEF200-1200 B. PEFR C. MVV D. FEF25%-75%arrow_forwardAt sea level, the alveolar water vapor pressure in normally about A. 0.2 mm Hg B. 47 mm Hg C. 0.0 mm Hg D. 40 mm Hgarrow_forwardIf a patient is receiving an FIO2 of 0.60 on a day when the barometric pressure is 725 mm Hg, and if the Paco2 is 50 mm Hg, what is the patients alveolar oxygen tension (PAo2)? A. 177 mm Hg B. 233 mm Hg C. 344 mm Hg D. 415 mm Hgarrow_forward
- A spontaneously breathing patient has a normal PaCO2 of 40 mm Hg, a minute ventilation (VE) of 6 L/min, and a VD/VT ratio of 35% (0.35). Then the patient develops a pulmonary embolus (PE), blocking blood flow to a significant number of ventilated avleoli. Consequently, the measured VD/VT increases to 65% (0.65). 1. Calculate the alveolar ventilation associated with teh original PaCO2 of 40 mm Hg. 2. To maintain the same PaCO2 of 40 after the embolus occurs, what change must occur in total minute ventilation (VE)?arrow_forward"Compute for the Expiratory reserve volume, given residual volume is 1L, Tidal volume is 0.5L, Total lung volume is 5L, Functional residual capacity is 2L, inspiratory reserve volume is 2.5L." a 4L b 3L c 1L d not in the choicesarrow_forwardVO2 calculation scenario: Body mass= 102 kg, HR= 180 beats/min, SV= 110 ml blood/beat, venous oxygen content = 4 ml O2/100 ml blood. What is the VO2 (ml O2/kg/min) for this scenario? (round to the nearest tenth). Remember your answer, as you will be asked to interpret this VO2 in another question. a. 31.1 b. 776.5 c. 3.5 d. 221.8 e. 7.8arrow_forward
- The VD/VT is: (Select all that apply.) A modification of the Bohr equation Wasted ventilation Most commonly done to document deadspace in patients with pulmonary emboli Normally 20 to 40% in an adultarrow_forward1. During mechanical ventilation of a patient with COPD, the PaCO2 = 58 mm Hg and the minute ventilation = 5.5 L/min. The desired PaCO2 for this patient is 45 mm Hg. To what should the minute ventilation be changed? [Formula for Desired VT = Known PaCO2 ⋅ Known VT / Desired PaCO2] a. 4.3 L/minb. 4.8 L/minc. 6.6 L/mind. 7.1 L/minarrow_forwardA patient receiving control-mode continuous mandatory ventilation has the following ABG on an FiO2 of 0.5: pH = 7.23; PCO2 = 61 mm Hg; HCO3– = 26 mm Hg. The current minute ventilation (VE) is 9.2 L/min. What new VE would you recommend? a. a) 10.6 L/minb) 14.0 L/minc) 12.4 L/mind) 5.8 L/minarrow_forward
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