Using the data below, perform the calculations necessary to evaluate the V/Q matching for CO2.
VE = 8 L/min
f = 20 br/min
PaCO2 = 49 mm
Hg PeCO2 = 35 mm Hg
Ideal body weight = 170 lbs
*Show all work, formulas used to support your answers!
The patient is hyperventilating A. correct B. incorrect
The patient's Vt = 2.5 L/breath A. correct B. incorrect
The VD/VT is within normal limits A. correct B. incorrect
This patient may have pulmonary emboli A. correct B. incorrect
V/Q ratio is a ventilation- perfusion ratio..It is the ratio between the amount of air getting to the lung alveoli and the amount of blood being sent to the lungs..Both v and Q will be in ml/ min..
V/Q = alveolar ventilation/ cardiac output
It is the balance between ventilation and perfusion..it is important due to ratio between the ventilation and perfusion it is the major factor affecting alveolar and levels of O2 and CO2 level..
Increased paco2 is always a reflection of inadequate alveolar ventilation..when pco2 decrease there will be diffusion in to the blood..this diffusion continues..
Normal range of paco2 is 35 - 45mm..patient paco2 level 49mm..so patient hyperventilating..
A , correct
Vt normal range 10- 12ml/kg IBM.. Restrictive lungs vt 4-8ml/kg IBM..it can be calculated based on patient weight 170Ibs or 77kg
Patient VE level 8L/min
Vt at 8ml/77=9.6L/ breath
B, incorrect
Normal VD/VT ranges from 0.28 to 0.33..increased VD/VT can cause decrease in alveolar volume (VA)
By using Bohr dead space equation
VD/VT = paco2 - peco2/paco2
Patient paco2 level 49mm and peco2 level 35mmhg
So 49- 35/49= 0.28
It is normal in limits
A, correct
Impaired ventilation/ perfusion V/Q matching and gas exchange and elevate pulmonary arterial pressure can cause pulmonary embolism..here Patient is hyperventilating and high vt level and CO2 level can cause pulmonary embolism for Patient..
A, correct
Using the data below, perform the calculations necessary to evaluate the V/Q matching for CO2. VE...
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