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Why do we use FEV1/FVC which is a measure of exhalation rate in pulmonary function testing instead of rate of inhalation?
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- The average compliance of the lungs and chest wall combined is 0.1 L/cm H2O. 0.2 L/cm H2O 0.3 L/cm H2O 0.4 L/cm H2OUsing the following lung volumes, calculate this persons FEV1 / FVC ratio. What this person's pulmonary function be clinically classified: normal, obstructive, or restricted? TLC = 5.2 L FVC = 3.8 TV = 0.5 L ERV = 1.1 L IRV = 2.2 L This person forcefully expired 2.4 L in one second. according to reference material, normal VC for this person is 3.6 L.Where should the sensor be placed when analyzing the oxygen concentration (FiO2)? How does the RT calibrate the oxygen analyzer? How does a pulse oximeter measure saturation? What shift in the O2 - Hemoglobin curve occurs due to carboxyhemoglobin? Provide at least 3 clinical manifestations of carbon monoxide poisoning
- What is the % predicted Fev1/fvc % prebronchodilator and % predicted Fev1/fvc % postbronchodilator? Please interpre the following pulmonary function test.The respiratory system is involved in many diseases. Pulmonary Function tests represent a significant tool in our ability to evaluate and diagnose pulmonary conditions. Please discuss all of the components of pulmonary function testing, and discuss the findings one would see with a particular diagnosis of your choosing (asthma, COPD, emphysema, left sided heart failure, cor pulmonale, etc).In a spirometry lung functions test, define and explain how tidal volume (TV), functional residual capacity (FRC), and FEV1 compare in normal lung and the lung of an emphysema patient.
- Does the FEV1% serve as the key pulmonary function measurement to differentiate between an obstructive and restrictive lung disorder? How?A female patient has presented with the following results for spirometry and plasma Po2. What is your diagnosis? Parameter Vital Capacity FEV₁ FVC Arterial Po2 Venous Po2 COPD O Pulmonary fibrosis Pulmonary oedema Value 3160 ml 2420 ml 3020 ml 100 mmHg 53 mmHg O Methemoglobinaemia (causes a leftward shift in the oxygen-haemoglobin dissociation curve)Minute ventilation (Ve, L/min) is the result of tidal volume (TV, L/breath) and frequency (f, breaths/min) such that Ve = TV x f. The Ve which would result in the greatest alveolar ventilation would be: %3D O Ve = 5, TV =1.0 , f = 5 O Ve = 5, TV = 0.5, f = 10 O Ve = 5, TV = 0.25, f = 20
- How do you think FEF25-75 & RV would have been affected by simulated airway obstruction and why?What is below lung tests indicate? could you please explain more details ,thanks Residual Volume (results of 3.95) means? FEF 25‐75 scored 0.73 indicate ? Total Lung Capacity (5.88) means? FRC (4.35) means?A patient experiences difficulty exhaling after taking a normal, full breath during a test of pulmonary function. Which of the following is (are) TRUE? A) This condition may have decreased the elastic recoil of the lungs. B) The patient likely has an obstructive lung disorder. The patient likely has a restrictive lung disorder. This patient will have a normal forced expiration. E This patient will likely show a normal FEV1.