lOMoARcPSD|61299927
Week 3 Case Study Template
Pathophysiology & Clinical Findings of the Disease
1. Are the spirometry results consistent with obstructive or restrictive pulmonary disease?
What is the most likely pulmonary diagnosis for this patient?
The spirometry results are consistent with obstructive pulmonary disease as we can see
his forced expiratory volume in one second (FEV1) is 64%, which is less than 80%. The
FEV1/FVC ratio is 69% pre-bronchodilator and 64% post-bronchodilator. The average
FeEV1/FVC ratio is greater than 70%, and both FEV1 and FVC are above 80% (Ponce et
al., 2023). The TLC of this patient is 125, which is a normal reading and expected in
obstructive pulmonary disease because a reduction in TLC below 80% and average
FEV1/FVC ratio is characteristic of restrictive lung disease (Ponce et al., 2023).
Interpreting the findings of spirometry and based on the clinical symptoms of this patient,
Chronic Obstructive Pulmonary Disease is the most likely diagnosis. As we can see, there
is no improvement of more than 12% in post-bronchodilator findings of FEV1 or FVC,
which excludes the differential diagnosis of Asthma, which is also an obstructive lung
disease. His history of bronchitis three years ago, significant smoking history and being a
current smoker, dyspnea on exertion, and bilateral wheeze on physical examination are
also suggestive of COPD.
2. Explain the pathophysiology associated with the chosen pulmonary disease.
COPD is characterized as an inflammatory condition affecting the airways, lung
parenchyma, and pulmonary vasculature, with the underlying process involving oxidative
stress and imbalances in protease-antiprotease activity (Agarwal, et al., 2023).
Emphysema, a structural alteration observed in COPD, entails the breakdown of alveolar
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, lOMoARcPSD|61299927
Week 3 Case Study Template
air sacs, which are vital for gas exchange, resulting in obstructive physiology (McCance,
et al., 2019). The development of emphysema is triggered by irritants, such as smoking,
prompting an inflammatory response with the recruitment of neutrophils and
macrophages. These immune cells release various inflammatory mediators, oxidants, and
excessive proteases, leading to the deterioration of air sacs. The protease-induced
degradation of elastin contributes to the loss of elastic recoil, ultimately causing airway
collapse during exhalation and resulting in air-trapping. The decrease in forced expiratory
volume (FEV1) and the obstruction of airways result from the inflammatory response,
leading to airflow limitation and compromised gas exchange due to tissue destruction
(Agarwal, et al., 2023). Imaging studies frequently reveal hyperinflation of the lungs,
primarily caused by air trapping resulting from airway collapse during exhalation.
Additionally, the inability to complete a full exhalation contributes to elevated carbon
dioxide (CO2) levels.
3. Identify at least three subjective findings from the case that support the chosen diagnosis.
The patient's 35-pack-year smoking history serves as a subjective indication supporting
the diagnosis of COPD. The patient reports symptoms such as dyspnea during exertion, a
dry, nonproductive cough, fatigue, and chest tightness/mid-sternal chest pain. I would be
supportive of this diagnosis for this patient.
4. Identify at least three objective findings from the case that support the chosen diagnosis.
The objective findings in this patient that support the chosen diagnosis are bilateral
wheeze noted with forced exhalation with prolonged expiratory phase, bilateral hyper-
Downloaded by James Banks ()
Week 3 Case Study Template
Pathophysiology & Clinical Findings of the Disease
1. Are the spirometry results consistent with obstructive or restrictive pulmonary disease?
What is the most likely pulmonary diagnosis for this patient?
The spirometry results are consistent with obstructive pulmonary disease as we can see
his forced expiratory volume in one second (FEV1) is 64%, which is less than 80%. The
FEV1/FVC ratio is 69% pre-bronchodilator and 64% post-bronchodilator. The average
FeEV1/FVC ratio is greater than 70%, and both FEV1 and FVC are above 80% (Ponce et
al., 2023). The TLC of this patient is 125, which is a normal reading and expected in
obstructive pulmonary disease because a reduction in TLC below 80% and average
FEV1/FVC ratio is characteristic of restrictive lung disease (Ponce et al., 2023).
Interpreting the findings of spirometry and based on the clinical symptoms of this patient,
Chronic Obstructive Pulmonary Disease is the most likely diagnosis. As we can see, there
is no improvement of more than 12% in post-bronchodilator findings of FEV1 or FVC,
which excludes the differential diagnosis of Asthma, which is also an obstructive lung
disease. His history of bronchitis three years ago, significant smoking history and being a
current smoker, dyspnea on exertion, and bilateral wheeze on physical examination are
also suggestive of COPD.
2. Explain the pathophysiology associated with the chosen pulmonary disease.
COPD is characterized as an inflammatory condition affecting the airways, lung
parenchyma, and pulmonary vasculature, with the underlying process involving oxidative
stress and imbalances in protease-antiprotease activity (Agarwal, et al., 2023).
Emphysema, a structural alteration observed in COPD, entails the breakdown of alveolar
Downloaded by James Banks ()
, lOMoARcPSD|61299927
Week 3 Case Study Template
air sacs, which are vital for gas exchange, resulting in obstructive physiology (McCance,
et al., 2019). The development of emphysema is triggered by irritants, such as smoking,
prompting an inflammatory response with the recruitment of neutrophils and
macrophages. These immune cells release various inflammatory mediators, oxidants, and
excessive proteases, leading to the deterioration of air sacs. The protease-induced
degradation of elastin contributes to the loss of elastic recoil, ultimately causing airway
collapse during exhalation and resulting in air-trapping. The decrease in forced expiratory
volume (FEV1) and the obstruction of airways result from the inflammatory response,
leading to airflow limitation and compromised gas exchange due to tissue destruction
(Agarwal, et al., 2023). Imaging studies frequently reveal hyperinflation of the lungs,
primarily caused by air trapping resulting from airway collapse during exhalation.
Additionally, the inability to complete a full exhalation contributes to elevated carbon
dioxide (CO2) levels.
3. Identify at least three subjective findings from the case that support the chosen diagnosis.
The patient's 35-pack-year smoking history serves as a subjective indication supporting
the diagnosis of COPD. The patient reports symptoms such as dyspnea during exertion, a
dry, nonproductive cough, fatigue, and chest tightness/mid-sternal chest pain. I would be
supportive of this diagnosis for this patient.
4. Identify at least three objective findings from the case that support the chosen diagnosis.
The objective findings in this patient that support the chosen diagnosis are bilateral
wheeze noted with forced exhalation with prolonged expiratory phase, bilateral hyper-
Downloaded by James Banks ()
