Patho Flashcards
___ is the selective bulbous enlargement of the end of a finger or a toe.
Severity can be graded from 1-5 based on the extent of the nail bed hypertrophy and the amount of changes in the nails themselves
It’s painless and associated with diseases that disrupt the normal pulmonary circulation and cause chronic hypoxemia such as:
Bronchiectasis Cystic fibrosis Pulmonary fibrosis Lung abscess Congenital heart disease Rarely reversible
Clubbing
__ __ results from the fracture of several consecutive ribs in more than one place or fracture of the sternum and several consecutive ribs.
The multiple fractures result in instability of a portion of the chest wall, causing * paradoxical movement* of the chest with breathing
During inspiration the unstable portion of the chest wall moves inward and during expiration it moves outward, impairing gas exchange
Chest wall restriction results in decrease tidal volume.
Diagnosis made by PFTs, ABG measurement (hypercapnia), and radiographs
Tx: aimed at any reversible underlying cause, but otherwise supportive, severe case, mechanical vents
Flail chest
Type of pneumothorax
___ is caused by the rupture of blebs or blisters on the surface of the lungs
Spontaneous
Type of pneumothorax
___ is a result of chest trauma such as stabbing, gunshot wound, and broken ribs.
Secondary
Type of pneumothorax
___: air can enter but not escape. WORST TYPE. Life threatening
Tension
___ ___ is presence of the fluid in the pleural space .
Source is usually from blood vessels or lymphatic vessels lying beneath the pleural space, but occasionally an abscess or other lesion may drain.
Can be: Transudative (watery) Exudative (high concentration of WBC and plasma protein) Hemothorax (blood) Empyema(pus) Chylothorax (chyle)
Small collections of fluid may not affect lung function and remain undetected. Most will be removed by the lymphatic system once the underlying condition is resolved.
In larger effusions, dyspnea, compression acetectasis with impaired ventilation, and pleural pain are common.
Manifestations:
Mediastinal shift
Cardiovascular manifestations
Decreased breath sounds and dullness on affected side
Pleural friction rub over inflamed area.
Dx: chest x ray and Thoracentesis (which can determine the type of effusion and provide symptomatic relief. If effusion is large drainage usually requires placement of chest tube and surgical interventions
Pleural effusion *****
____ is infected pleural effusion; presence of pus in pleural space** and develops when the pulmonary lymphatics become blocked, leading to an outpouring of contaminated lymphatic fluid into the pleural space.
Occurs mostly in older adults and children.
Develops as a complication of pneumonia, surgery, trauma, or bronchial obstruction from a tumor. Infectious organisms include: staphylococcus aureus, E. coli, anaerobic bacteria, klebsiella pneumoniae
Manifestations: cyanosis, fever, tachycardia, cough, pleural pain, decreased breath sounds over affected side.
Dx: chest radiographs, thoracentesis, sputum culture
Tx: antimicrobials , chest tube
Empyema
Aspiration pneumonia occurs when food, liquids, or vomit is breathed into the lungs or airways feeding to the lungs. Instead of being swallowed into the esophagus and stomach.
Right lung* particularly in the right lower lobe* is more susceptible to aspiration than the left lung because the branching angle of the right Main stem bronchus is straighter than the branching angle of the left main stem bronchus.
Aspiration of oral and pharyngeal secretions can lead to aspiration pneumonia*
Intubation of the trachea also can cause aspiration and bacterial pneumonia
Acid gastric fluid can cause severe pneumonitis
Bronchial damage includes inflammation, loss ciliary function, and bronchospasm.
In the alveoli, acidic fluid damages the alveolocapillary membrane, allowing plasma and blood cells to move from capillaries into the alveoli that results in hemorrhagic pneumonitis.
Lungs become stiff and non compliant as surfactant production is disrupted, leading to further edema and collapse.
Manifestations: sudden onset of choking. Intractable cough with or without vomiting, fever, wheezing, dyspnea, some have no symptoms but instead they have recurrent lung infections, chronic cough, or persistent wheezing over month and possible years.
Prevention measures: semi Fowler’s 30-45 degrees, surveillance of enteral feedings, promotility agents, avoidance of excessive sedation, NGT can also cause aspiration if fluid and particulate matter are regurgitated as the tube is being placed.
Tx: supplemental O2, mechanical vent with positive end expiratory pressure, corticosteroids,
Fluids are restricted to decrease blood volume and minimize pulmonary edema
Bacterial pneumonia may develop as a complication of aspiration pneumonitis and must be treated with broad spectrum antimicrobials
___ is the collapse of lung tissue. Tends to occur after surgery, especially if general anesthesia was administered.
Postoperative patients are more often in pain, breathe shallowly, are reluctant to change position, and produce viscous secretions that pool in dependent portions of the lung.
Increases shunt, decreases compliance, and may lead to perioperative hypoxemia.
Clinical manifestations: dyspnea, cough, fever, leukocytosis
Prevention and tx:
Deep breathing exercises (incentive spirometry) promotes ciliary clearance of secretion, stabilizes the alveoli by redistributing surfactant, and promotes collateral ventilation through the pores of kohn, promoting expansion of collapsed alveoli. Position changes and early ambulation.
Atelectasis
___ ___ is excess water in the lung due to changes in hydrostatic and oncotic pressure and capillary permeability.
Most common cause of this is left sided heart disease
Injury to capillary lining= permeability and fluid development. Blocked lymphatic channels=inability to remove excess fluid
Manifestations: dyspnea, hypoxemia, increased work of breathing, inspiratory crackles, pink, frothy sputum, C02 retention (hypercapnia)
Pulmonary edema
ARDS is active lung inflammation and diffuse alveocapillary injury that results from injury or severe systemic inflammation.
Acute onset of bilateral infiltrates on chest radiograph
Progressive manifestations:
Dyspnea and hypoxemia despite supplemental oxygen
Hyperventilation (respiratory alkalosis), decreased tissue perfusion (metabolic acidosis) and organ dysfunction, increased work of breathing, decreased tidal volume, and hypo ventilation, hypercapnia (respiratory acidosis), respiratory failure, decreased cardiac output, hypotension=death.
Tx: early detection, ventilatory support, oxygenation, preventing infection, and prevention of further complication
Know
___ is chronic inflammation of the airways
Causes: chronic hyper responsiveness, constriction of airways, and reversible airflow obstruction.
Asthma
___ ___ is respiratory failure that comes with the worst form of acute severe asthma, or an asthma attack: if an attack comes quickly and doesn’t respond to regular treatment, it can lead to this.
Symptoms: exploratory wheezing, dyspnea, tachypnea.
Tx: peak flow meters (to measure expiratory flow rate- EFR), corticosteroids, beta antagonist inhalers, anti inflammatory.
FEV: forced expiratory volume.
Status asthmaticus
A: adrenergics (beta 2 antagonists) (albuterol) S: steroids T: theophylline H: hydration M: mask o2 A: anticholinergics
Know
___ ___ is the hyper-secretion of mucus and chronic productive cough that lasts for more at least 3 months of the year and for at least 2 consecutive years.
Manifestations: productive thick mucous with cough, hypo ventilation/difficulty breathing.
Tx: bronchodilator, expectorants, Chest physical therapy.
Chronic bronchitis
___ is an abnormal permanent enlargement of the gas exchange airways accompanied by destruction of alveolar walls without obvious fibrosis.
Inherited deficit of A1- antitrypsin (inhibits proteolytic enzymes that destroy lung tissue), loss of elastic recoil, and air trapping.
Emphysema
Acute bronchitis is an inflammation of the airways or bronchi.
Commonly follows a viral illness
Acute bronchitis causes symptoms similar to pneumonia but does not demonstrate pulmonary consolidation and chest infiltrates.
Know
Pneumonia is a lower respiratory tract infection.
Types: community acquired (CAP), streptococcus pneumoniae, influenza, healthcare acquired, ventilator associated.
Manifestation: proceeded by upper respiratory infection
Consolidation: fever, chills, dry cough, pain, dyspnea, crackles
Know
Tuberculosis:
Progressive fatigue, malaise, anorexia, weight loss, pleuritic pain, chest pain, chronic productive cough, night sweats, hemoptysis (advanced state), low grade temp in afternoon.
Know
__ ___ occlusion caused by an embolus. Blood clot, tissue fragment, lipids, foreign body, air bubble, amniotic fluid. They originate commonly from DVT in the lower legs
Pulmonary embolus
___ __ result off pulmonary hypertension.
Pulmonary hypertension creates chronic pressure overload in the right ventricle- right ventricle enlargement.
Cor pulmonale
What is the main manifestation of laryngeal cancer?
Progressive hoarseness with voice loss
What is a V/Q mismatch?
Ventilation perfusion mismatch occurs when either the ventilation (airflow) or perfusion (blood flow) in the lungs is impaired, preventing the lungs from optimally delivering O2 in the blood.
___ GI bleed- caused by injury or inflammation. Consisting of the esophagus, stomach, or duodenum.
Bright red (active bleed) or dark “coffee ground” (digested blood)
Common causes: esophageal varices, peptic ulcers, esophageal tears.
Upper GI bleed