Chapter 3 Respiratory System Flashcards
What is Adult Respiratory Stress Syndrome?
The sudden respiratory system failure because of the inability of the alveolar capillary to exchange air and gases
What age does ARDS develop?
Anyone over the age of 1 year
What is ARDS caused by?
acute alveolar injuries such as toxic inhalation, septic shock, and near drowning
What happens when ARDS first happens?
It starts with swelling of tissue in the lungs and building upon fluid in the alveoli which leads to low blood oxygen levels
Who are more susceptible to getting ARDS?
Those who smoke, those with COPD, or those over the age of 65 years
What is Asthma?
A chronic disease that affects the lining of the bronchioles.
What happens to the bronchioles with asthma?
They become inflamed and swollen
What is the cause of asthma?
The cause is unknown but factors that are thought to trigger an attack are respiratory tract infection, anxiety, exercise, and changes in the weather or allergies
What are symptoms of an acute asthma episode?
Wheezing, coughing, and a feeling of chest tightening
With chronic asthma, what happens to a persons breathing?
There is forced breathing over a long period of time that may result in fatigue
What is there a secretion of with asthma?
There is secretion and edema of the bronchial mucosa and bronchiolar muscle spasm which narrows the lumen of the bronchi, trapping air in the alveoli and causing labored breathing
What may happen to the bronchial muscle with asthma?
It may become hypertrophied and there is hyperplasia of the mucous glands in the bronchi
How does the diaphragm appear on a radiograph with asthma?
the diaphragm appears low
What are complications associated with severe asthma attacks?
Obstruction due to a mucous plug and pneumothorax or oneumomediastinum
What is atelectasis?
The collapse of a lung or a portion of it
What is atelectasis caused by?
A pathologic condition and therefore it is not a disease in itself
What is bronchiectasis?
The irreversible chronic dilation of smaller bronchi or bronchioles of the lung
What are the different types of bronchiectasis?
Congenital or acquired
What plays an important role in congenital bronchiectasis?
Cystic fibrosis
What causes acquired bronchiectasis?
Repeated pulmonary infection and bronchial obstruction which causes a weakening of the wall of the bronchus, allowing the bronchi to become dilated
What is bronchiectasis common in?
Lung abscess cases
What are the typical symptoms of bronchiectasis?
A chronic productive cough, often associated with recurrent episodes of acute pneumonia
What helps diagnose bronchiectasis?
A bronchoscopy
What is Chronic obstructive pulmonary disease?
A disease in which the lungs have difficulty expelling carbon dioxide
The term COPD is really a process that is characterized by what?
The presence of either chronic bronchitis or emphysema
What is Croup?
Primarily a viral infection, particularly of the parainfluenza viruses
Who does croup most often affect?
Very young children, generally aged about 6 months to 3 years
What are symptoms of Croup?
Labored breathing and a harsh, rough cough
What images are taken to demonstrate croup?
AP soft-tissue and lateral neck radiographs which show spasms and constriction of the airway by demonstrating characteristic smooth, tapered narrowing of the subglottic airway
What is plural effusion?
Fluid in the pleural cavity
What are possible causes of pleural effusion?
Congestive heart failure, infection, neoplasm, and trauma
What is the most common cause of bilateral or right-sided pleural effusion?
CHF
If only one side is affected by a pleural effusion, what side is it usually?
The right side
What will help determine the cause of a pleural effusion?
The type of fluid (transudates vs. exudates)
What are exudates associated with?
Infection, tumor, and embolism
What are transudates associated with?
CHF and renal failure or cirrhosis
What modality plays an important role in the diagnosis of pleural effusion?
Chest radiographs
Where does fluid first accumulate with pleural effusion?
In the posterior costophrenic angle that is viewed on the erect lateral view of the chest
How much fluid is required for detection on a lateral image with pleural effusion?
More than 175 mL
On a PA view with pleural effusion, where can fluid be seen?
At the lateral costophrenic angles (less than 75 mL of fluid is required for detection)
What do opacities do with pleural effusion?
They blunt or round off the normally sharp costophrenic angles by displaying an upper concavity knows as the meniscus sign
How is a small amount of effusion best shown?
With the patient lying with the affected side DOWN in a lateral decub
What is bronchogenic carcinoma?
A broad term used to describe any carcinoma of the bronchus
What is the highest risk factor for all types of bronchogenic carcinoma?
Smoking
What are other factors for bronchogenic carcinoma?
radiation and uranium miners, and asbestos exposure
What are symptoms of bronchogenic carcinoma?
Persistent cough, bloody sputum, dyspnea, and weight loss
What do chest images show with bronchogenic carcinoma?
a rounded opacity without calcification in the lobes of the lung
What is TB caused by?
Mycobacterium TB or M. bovis
How is TB spread?
Through inhalation or infected material from someone who already has the disease
What are general symptoms of TB?
Fever, loss of weight, and weakness
What depend on the type of TB the patient has?
Coughing and sputum