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Pulmonary 1.1
UWORLD + FA Pulmonary Respiratory Review
Question | Answer |
---|---|
Unique fungus with a Polysaccharide capsule? | Cryptococcus neoformans |
The polysaccharide capsule in C. neoformans, stains? | Red on Muscarine stain CLEAR on INDIA INK |
What are the possible infections of Cryptococcus neoformans? | CNS --- meningoencephalitis (AIDS patients MC) Cryptococcal Lung disease --LUNGS |
What is the treatment of C. neoformans? | Initially Amphotericin B and Flucytosine. Then maintenance is done by fluconazole (AIDS patients) |
Cryptococcus is an _________________- (+) organism, which causes _______ in pH by increasing release of _______________ and ______. | Urease; Increase in pH; Ammonia and CO2 |
Narrow budding, heavily encapsulated, and Urease positive? Where is it commonly found? | C. neoformans is commonly found in soil and bird droppings |
C. neoforman infection in HIV (+) patient is commonly due when the CD4+ count falls below? | 100 cell/mm3 |
What is the MCC of meningitis in HIV patients? | Cryptococcus neoformans infection |
Pulmonary V/Q is defined by _____________ and _____________. | Perfusion and Ventilation |
Perfusion and ventilation are both larger in the _________________ of the lung. | BASE |
V/Q ______________________ from the _____________ to the base. | Decreases; Apex to Base |
The greatest V/Q value is at the _____________ of the lung, while the lowest V/Q value is at the ____________ of the lung. | APEX-- max value BASE -- min value |
Which, perfusion or ventilation, has a greater or more significant increase as it we travel from apex to the base of the lungs? | Perfusion has a greater/more significant increase as we travel down the lung. |
On what factors is gas exchange dependable? | Perfusion and Diffusion |
Gas exchange occurs among which two structures? | ALVEOLI and pulmonary capillary |
Healthy individual is _______________________ - limited, meaning? | Perfusion-limited; Alveolar and Capillary pressures are EQUAL |
A patients with Emphysema or pulmonary fibrosis, is ______________-limited. | Diffusion limited |
What are some common condition that promote gas exchange to be Diffusion-limited? | Emphysema and Pulmonary fibrosis |
In Diffusion-limited gas exchange, the is a ________ gradient between the _____ and _______________ ________. | Large; alveolar; capillary ; PO2 |
Why is PO2 affected in much more significant effect than PCO2, in cases of deficiency gas exchange? | CO2 has a greater diffusing capacity and it crosses the between the capillary and the alveoli, 20x faster |
What are the approximate partial pressures INSIDE the alveolus? | PAO2 --> 105 PA CO2 --> 40 |
Approximate values of Partial pressures in the Pulmonary vein, and systemic (body) arteries? | PaO2 is 100 and PaCO2 is 40 |
What are the changes to partial pressure in the systemic venous system and pulmonary artery, compared to those in the systemic arterial systems and pulmonary vein? | The Partial arterial pressure of Oxygen drops dramatically form 100 to 40, while in the case of PaCO2 the venous system has an slight elevation of 6 units, making it 46. |
What factor/action may induce an increase in skeletal CO2 production? | Aerobic exercise |
Elevation of blood CO2 causes: | 1. Decrease In O2 content 2, Increase in CO2 content which lead to a decrease in venous blood pH. |
Homeostatic mechanisms to maintain normal ABGs, are more effective controlling the ________________ pH, than the venous pH. | Arterial |
Exercise does not affect _______________ and _____________, but increase ____________ and decrease _______________. | PaO2 and PaCO2 are not changed; Increase in venous CO2 content and decreased venous O2 content |
Partial pressures are not affected in exercise because it is a measure of __________________ and not a ____________. | Dissolving; Quantity measure. |
What is the most aggressive type of lung cancer? | Small cell lung cancer |
Small cell lung cancer is of _______________ origin. Its tumor cells contain __________________ granules in the cytoplasm, which incice __________, _____________, _______________, and _______________. | Neuroendocrine; Neurosecretory; NCAM, Enolase, Chromogranin, and synaptophysin |
KRAS genes are associated with: | NON-small cell lung cancer |
What type of cancer is staind with vimentin? | Sarcomas |
Sarcomas stain positive for ____________________. | Vimentin |
What are the functions of Ciliated epithelial cells? | 1. Mucociliary clearance 2. Clear most inhaled particle in the bronchial tree, especially at the Proximal bronchial. |
What is the major stimulator of respiration? | PaCO2 |
An increase in PaCO2 leads to: | Increased pulmonary ventilation |
A patient with COPD, has a defective to _________ response, leaving _____________________ as the most important contributor of respiratory drive. | PaCO2; HYPOXEMIA |
Which chemoreceptors are the most important affecting respiration in cases of changes to PaCO2 response? | Peripheral chemoreceptors, especially those in the CAROTIDS |
Description of Central chemoreceptors: | Located in MEDULLA -Primarily stimulated by pH of CSF - CO2 can readily cross BBB, causing an increase in [H+] - Increase in PaCO2 is a major stimulator of central chemoreceptors |
Where are the Peripheral chemoreceptors located? | Carotid and Aortic areas |
Description of Peripheral chemoreceptors: | Located in CAROTIDS & AORTIC - Primary for sensing PaCO2 and stimulated by HYPOXEMIA - Also stimulated by: - Increased PaCO2 - Increase in blood [H+] |
What are Pulmonary Stretch receptors? | Myelinated and unmyelinated G-fibers in lungs and airways |
Regulation and duration of respiration of depending on the degree of lung distension. | Hering-Breuer reflex |
What are the 2 main function of Type II Pneumocytes? | 1. Regeneration of the alveolar lining following an injury 2. Surfactant production |
Type II pneumocytes account of _______% of all cells in the lungs. | 5% |
What cells are the progenitors of Type I (1) pneumocytes? | Type II pneumocytes |
Type I pneumocytes: | Cover 95% of alveolar surface and cannot regenerate their own |
Respiratory epithelium of bronchi and larger bronchioles. Terminally-differentiated, mucin-producing cells | Goblet cells |
What pulmonary cells are responsible for production of mucus? | Goblet cells |
What are characteristics and functions of Club cells? | - Non-ciliated - Terminal portions of bronchioles - Act as regenerative ciliated cells in the bronchioles |
Squamous; thin for optimal gas diffusion | Type I pneumocytes |
What is pulmonary surfactant? | Complex mix of lecithins, the most important which is dipalmitoylphosphatidylcholine (DPPC) |
At which week of gestation is surfactant begins to be produced? | 20 week |
At week ______ of gestation, _________ should be fully produced. | 35 week; Surfactant |
Cyclic breathing pattern in which apnea is followed by gradually increasing and then decreasing TV until the next apneic period. | Cheyne-Stoke breathing |
What conditions are associated with Cheyne-Stoke breathing? | Advance congestive heart failure - Neurologic conditions such as: * Stroke, brain tumors, and traumatic brain injury |
Hypocapnia, especially at night and chronic hyperventilation, seen with a abnormal breathing pattern? | Cheyne-Stoke breathing |
Respiration pattern described as DEEP and LABORED pattern, associated with metabolic acidosis, especially in DKA. | Kussmaul breathing |
Patient with DKA may develop metabolic acidosis and ___________ breathing. | Kussmaul breathing |
What is a common corticosteroid drug used to treat the inflammatory effects of asthma? | Fluticasone |
What type of medications used for asthma, have the strongest anti-inflammatory effects? | Corticosteroids |
Muscarinic antagonist | Ipratropium |
Montelukast is an _____________ ______________, used in long-term treatment of __________, but has low efficacy and no ____________ effects. | Leukotriene inhibitor; ASTHMA; anti-inflammatory |
Phosphodiesterase inhibitor used in asthma is ________________. | Theophylline |
What is the results of the MoA seen in Theophylline? | Increase in intracellular cAMP -----> Bronchodilation |
Narrow therapeutic index, causes bronchodilation by increasing cAMP, and may cause cardiotoxicity and nephrotoxicity? | Theophylline |
What are the most important uses of Montelukast? | Aspirin-induced and exercise-induced asthma |
Omalizumab is an ______________________________. | Anti-IgE monoclonal therapy |
Which asthma drugs are directed to relieve symptoms and act as an early response? | B-agonist, Theophylline, Muscarinic antagonists |
What asthma drugs are directed to relieve symptoms and act on late response, and prevent bronchial hyperreactivity? | Steroids and Antileukotrienes |
What enzyme is responsible for the green-color of pus? | Myeloperoxidase |
Myeloperoxidase is released by _____________________, which then gives its _____________-color to pus. | Neutrophils; GREEN |
Community-acquired Pneumonia (CAP), is most commonly by _____________, CAP is seen in with _____________________ within one lobe of the lung. | Strep pneumoniae; cough with consolidation |
What is the normal range of PaCO2? | 38 - 42 mmHg |
High V/Q? | Blood saturated with O2 and lowest saturation of CO2. |
High ventilated areas _________ compensate for less ventilated | Cannot |
Blood cannot become fully saturated with __________, and highly ventilated areas _______ compensate with less ventilated. | CO2; can |
Arterial PCO2 (PaCO2) is a direct indicator of __________________ status. | Alveolar ventilation |
Hypocapnia produces _________________________. | Hyperventilation |
Why does hypocapnia produces hypoventilation? | Upper airway obstruction, reduced ventilation rate, respiratory failure and deces chest wall compliance, all together produces a low ventilation rate. |
What is the major serum inhibitor of neutrophil elastase? | Alpha-1-antitrypsin (AAT) |
What kind of emphysema is often caused by AAT deficiency? | Panacinar emphysema |
Panacinar emphysema affects the ___________________lobes of the lung. | Lower |
The _________ lobes of the lungs are most affected ____________________ emphysema. | Upper lobes; Centriacinar |
Panacinar emphysema is associated to: | 1. Family Hx of Lung and/or Liver disease (AAT deficiency) 2. Young age and minimal personal tobacco use |
Centriacinar emphysema, that affects the ________ lung lobes. It is strongly associated with: | Upper; Smoking --> leads to macrophages and neutrophils become activated, release proteasomes and acinar wall destruction |
CXR: Increased AP diameter, flattened diaphragm, Increased lung field lucency | Emphysema |
Enlargement of air spaces, increased recoil, increased compliance, and decreased diffusing capacity of CO. Dx? | Emphysema |
Barrel-chest | Emphysema |
Patient presents with barrel-shaped chest, exhalation through pursed lips. MC Dx? | Emphysema |
Why does a patient with chronic emphysema exhales through pursed lips? | Increases airway pressure and prevents airway collapse |
Physical findings in asthmatic patient: | Cough, WHEEZING, tachypnea, dyspnea, hypoxemia, decreased inspiratory/expiratory ratio, pulsus paradoxus, and mucus plugging |
What COPD condition shows an increased Diffusing capacity of CO? | Asthma |
Eosinophilic, hexagonal, double-pointed crystals, made from breakdown of eosinophils in sputum. | Charcot-Leyden crystals |
Charcot-Leyden crystals are associated with: | Asthma |
In COPD, what lung volumes are increased? | FRC, RV and TLC |
The FEV1: FVC ratio is _______________________ in COPD. | Decreased |
Decreased FEV1:FVC ratio is seen in __________________. | Obstructive lung diseases |
Increased FVE1;FVC ratio is seen in _____________________. | Restrictive lung diseases |
Decreased lung volumes, especially TLC and FVC, describes which kind of lung diseases? | Restrictive lung diseases |
Air goes in but gets trapped in alveoli, describes in simple terms, the pathogenesis of? | Obstructive lung diseases |
If air cannot get into the lungs, and shows short and shallow breaths. | Restrictive lung diseases |
MCC of "walking" pneumonia | Mycoplasma pneumoniae |
What are cold agglutinins? | IgM antibodies atha bind to RBCs and lead to agglutination/ clumping at low body temperatures |
Cold agglutinins are associated with ________________________ (microbe), which the most common cause of ________________ pneumonia. | Mycoplasma pneumoniae (M. pneumoniae); Walking |
Structural damage to lungs defines ______________ lung disease profile. | Restrictive |
What conditions or diseases are associated with cold agglutinin? | Mycoplasma pneumoniae infection, Mononucleosis, and hematologic malignancies such as CLL. |
Warm agglutinin are associated with? | IgG antibodies associated with SLE, CLL, and drugs such as a-methyldopa. |
Gram positive rod (branching/beaded), partially acid-fast, and aerobic. | Nocardia spp |
What are the CNS and lung manifestations of Nocardia infection? | Pneumonia symptoms similar to TB, and Brain abscesses. |
What is the treatment for Nocardiosis? | TMP-SMX |
Nocardia is: | 1. Partially (weakly) acid-fast stain 2. Aerobe 3. Urase (+) 4. Catalase (+) 5. Found in soil 6. Treated with sulfonamides (TMP-SMX) |
SNAP | Mnemonic to differentiate treatment between Nocardia and Actinomyces sppcs. Sulfonamides ----- Nocardia Actinomyces ------- Penicillin |
Clinical signs of Collapsed lung: | Due to Bronchial obstruction. Decreased breath sounds, hemithorax opacification , tracheal deviation towards affected side |
What is a common bronchial obstruction causing collapse of a lung? | Central lung tumor (Small cell or Squamous) |
Tracheal deviation to _____________________ side is to "_____" , as seen in cases of _____________________ and ____________________. | IPSILATERAL (affected); pull; Collapse and Fibrosis |
___________________ tracheal deviation is to "_________" the trachea to the _____________ affected side, as seen in cases of _____________ and _________________. | Contralateral; Push; Non-affected; Apical mass and Pleural effusion |
"DULL" lung auscultation is used to describe which conditions? | 1. Pleural effusion 2. Atelectasis 3. Consolidation (lobar pneumonia, pulmonary edema) |
Hyperresonant percussion of the thorax is seen in: | Tension pneumothorax and simple pneumothorax |
Which lung condition is the only to demonstrate Increased fremitus? | Consolidation (Lobar pneumonia and Pulmonary edema) |
Paroxysmal breathlessness and wheezing in young patient. | Extrinsic Allergic Asthma |
3-base pair deletion in the CFTR | Cystic Fibrosis |
In Cystic fibrosis, the mutated _________ gene in amino acid position __________, leads to impaired ______________________ processing of CFTR, leading to its destruction by Proteasome and its absence in the cell membrane. | CFTR gene; position 508; POST-TRANSLATIONAL; |
Elevated levels or Cl- and Na+ in the sweat make the diagnosis for: | Cystic Fibrosis |
Clinical presentation of Cystic fibrosis: | 1. Recurrent sinopulmonary infections, especially by PSEUDOMONAS AERUGINOSA 2. Pancreatic insufficiency --> pancreatitis 3. Malabsorption --> deficiency in Vitamins ADEK 4. Infertility |
Common organism in CF patient hat provokes URIs? | Pseudomonas aeruginosa |
CF patient is prone to fracture, dry skin, poor night vision, and possible bleeding, due to? | Malabsorption of lipid soluble vitamins |
Patient seeks help for infertility. Hx of recurrent sinopulmonary infections, with complete antibiotic treatment. Patient complains of recurrent central abdominal pain with greasy foods. Dx? | Cystic Fibrosis |
MC organism causing pneumonia in CF patient | Pseudomonas aeruginosa |
Reason of infertility seen in CF in males? | Absence of vas deferens |
Pulmonary actinomycosis affects more readily the _________ lobes, and MC occurs in cases of _________________. | Lower; Aspiration |
Filamentous, branching, gram (+) bacterial with sulfur granules. | Actinomyces |
Actinomyces: | Anaerobe, found in normal oral, reproductive and GI flora, sulfur granule producer, and treatment with Penicillin |
What are clinical manifestations of actinomyces infection? | 1. Oral/facial abscesses (drain in sinuses) 2. PID with IUDs |
Labs seen in sarcoidosis demonstrate: | Hypercalcemia and hyperuricemia, and elevated ACE levels. |
Non-caseating granulomas --> | Sarcoidosis |
What cytokines are secreted by Th1 cells? | INF-gamma, IL-2, and lymphotoxin B |
Th2 release which cytokines? | IL-4, IL-5, IL-10, and IL-13 |
INF-gamma inhibits __________ cells. | Th2 |
Which cytokines released by Th2 cells inhibit Th1 actions? | IL-4 and IL-10 |
Humoral immunity is mediated by: | Th2 cells |
Th1 cells mediated with immunity? | Cell mediated immunity |
A lack of IL-12 causes a decrease in: | Th1 cell activity, thus a impaired cell-mediated immune response. |
What are the effects of Th1 cytokine release, previously stimulated by IL-12? | 1. Activation of macrophages and CD8+ cells 2. Measure of delay type hypersensitivity |
Where does an primary (initial) TB infection replicate? | Alveolar space and Alveolar macrophages |
What substance/cytokine is released by macrophages previously infected with TB? | Interferon-gamma, which activates macrophages and controls the infection. |
Macrophage release of INF-g, causes phagolysosomes to destroy bacteria and also to: | Differentiate epithelioid cells and Multinucleated Langerhan cells, to surround mycobacteria within granulomas |
What kind of granulomas are seen in TB infection? | Caseating |
What cytokines are responsible to maintain the caseating granulomas seen in TB? | IL-12, INF-g, and TNF-a |
Histoplasma capsulatum: | dimorphic fungus that exists as a small, ovoid yeast at tissue temperatures. |
H. capsulatum may cause disseminated disease to the _________ , bone marrow, and ______________, causing _______________, _____________, and __________________, respectively. | liver, bone marrow, spleen; Hepatomegaly, Pancytopenia, splenomegaly |
What is used to culture H. capsulatum? | Sabour agar (cooler temperatures) |
Unique signs and symptoms of Histoplasmosis? | 1. Palatal/tongue ulcers 2. Splenomegaly |
Histoplasma is ________ than a RBC. | Smaller |
What kind or type of necrosis is seen with Histoplasma? | Caseous necrosis |
What is the treatment for all local infection by systemic mycoses? | Itraconazole or Fluconazole |
Disseminated histoplasmosis is treated with: | Amphotericin B |
Endemic in MIssissippi and Ohio River valleys | Histoplasma capsulatum |
Endemic region of Blastomyces? | Eastern and Central USA |
Southwestern USA and California are endemic region for which mycoses? | Coccidioides |
Latin America is the endemic region for which mycosis | Paracoccidioides |
Which mycoses is in similar size to a RBC? | Blastomyces |
_______________________ is much larger than an RBC. | Paracoccidioides |
Spherule filled with endospores in San Francisco, CA | Coccidioides |
Primary mediators of COPD? | Neutrophils, Macrophages, and CD8+ T-cells |
Primary mediators of COPD _______________, secrete _____________ which cause _____________________ seen in Emphysema, and __________________ found in cases of Chronic bronchitis. | Neutrophils, Macrophages, and CD8+ T-cells; Proteases; Alveolar destruction; Mucus hypersecretion |
At which level is a Chest tube best placed? | 4th and 5th intercostal spaces along the anterior maxillary or midaxillary lines. |
The 4th and 5th intercostal spaces at midaxillary line represent the base anatomical location to place a __________________. | Chest tube |
What is bronchitis obliterans? | Lung transplant chronic rejection, that progressively scares the small airways. |
Common cause of Respiratory alkalosis? | High altitude |
High altitude causes _____________________, which is compensated by the kidneys after several __________. | Hypoxemia; days |
Respiratory Alkalosis: | 1. High pH (>7.45) 2. Low PaCO2 (<35) 3. Delayed renal compensation |
ABG: Low HCO3, low pH, describes | Metabolic Acidosis |
ABG: Low pH and High PaCO2, describes? | Respiratory Acidosis |
The number of ___________ cells, decrease _______________ just before reaching the ___________________ ________________. | Goblet cells; Distally; Terminal bronchioles |
CLub cells form part of the cells in the _________________ bronchiole. | Terminal |
Which parts of the respiratory system have Ciliated epithelium? | Bronchi, Proxima bronchioles, and terminal bronchioles |
Ciliated Columnar cells in bronchial mucosa are found in? | Bronchi and Proximal Bronchioles |
The Respiratory bronchioles and Terminal bronchioles, have Ciliated ____________ epithelium. | Cuboidal |
The ______________ is the only part of bronchial mucosa that has ________________ and ____________. | Submucosal glands and Cartilage |
What lung forces are changed in AGING? | - Decrease in chest wall compliance - Increase in LUNG compliance, due to loss of Elastic recoil, thus, increasing RV, and derasein FVC. |
What is the purpose of lung's collateral circulation? | Protect against lung infarction |
The Pulmonary dual circulation is done by which to blood supply bodies? | 1. Pulmonary arteries 2. Bronchial arteries |
What is the major source of deoxygenated blood to the lung? | Pulmonary arteries |
Distal pulmonary vasculature occlusions tend to produce________ or __________ infarctions. | Red or Hemorrhagic |
A adequately perfused by poorly ventilated area is defined as _______________________. | Intrapulmonary shunting |
Simplistic pathogenesis of Intrapulmonary shunting. | The alveoli is not able to fully oxygenate the incoming blood----> hypoxemia. |
Centriacinar emphysema is associated with heavy _______________, affects the ___________________ of the lung, adn involves the release of proteinases such as _____________________, from neutrophils and alveolar macrophages. | Smoking; Upper lobes; Elastase |
A _______________ (club) cell is a secretory constituent found in the _______________ broinchile. Secretes protein and ________________ components, that help the detoxification of inhaled substance, such as cigarette smoke. | Clara; Terminal; Surfactant components |
Non-ciliated, low columnar/cuboidal epithelial cell with secretory granules, found in terminal bronchiole. | Club cell |
Proliferate during lung damage | Type II Pneumocytes |
What climate conditions worsen the hypochloremia and hyponatremia seen in CF? | Hot temperatures, as they increase the sweat production |
Absence CFTR in cell membrane | Cystic Fibrosis |
Why is important for a CF patient to be careful to practice exercise? | Increase in sweat increases the hypochloremia and hyponatremia |
Endothelin: | 1. Potent vasoconstriction 2. Smooth muscle prolerion stimulant |
Bosentan and Ambisetron are: | Endothelin receptor antagonists |
Drug commonly used to lower pulmonary arterial pressure, and improve dyspnea in patients with Pulmonary HTN | Bosentan |
What is the main difference in final effects between Endothelin, NO, and Prostacyclin? | Endothelin is a vasoCONSTRICTOR and Increase Smooth muscle proliferation, NO and PROSTACYCLIN are vasoDILATORS, and both decreased smooth muscle proliferation |
The nitrate oxide (NO) increases the levels of ________________, leading to _________________ and _____________________________. | cGMP; Vasodilation and decreased smooth muscle proliferation |
NO pathway and the Prostacyclin both achieve vasodilation and decrease SM proliferation by increased the serum level of __________. | cGMP |
What amino acid is precursor of NO? | L-arginine |
L-arginine becomes ____________________, which leads to an elevated level of _______________, resulting in: __________________ and decreased SM proliferation. | Nitric Oxide (NO); cGMP; Vasodilation |
Hypoxia caused by Chronic bronchitis: | Decreased diameter of the conducting airways, preventing adequate airflow |
Dilating alveolar air spaces leading to insufficient contact between the arie space the deoxygenated blood in the alveolar capillaries. | Hypoxia seen in Emphysema |
How is hypoxia caused by smoking? | Increased concentrations of carboxyhemoglobin in the blood |
Hypoxia relation to kidneys | Hypoxia is sensed by the RENAL cells in the RENAL CORTEX, which lead to an increase release in ERYTHROPOIETIN --> more RBC production. |
Stimulation of which cranial nerve in a patient with OSA, would aid to prevent apneic events during sleep? | Cranial Nerve 9 (Hypoglossal) |
What is the most common cause of CAP in HIV+ patients? in non-HIV infected? | Strep pneumoniae, in both populations |
Clinical presentation of Strep Pneumoniae CAP: | Acute-onset fever, productive cough, leukocytosis, and signs of lobar consolidation (dull percussion and increased fremitus), crackles. |
Any pathologic process that fills alveoli with fluid, pus, blood, cells, or other substances that result in lobar, diffuse, or multifocal ill defined opacities | Consolidation |
Interstitial lung pattern in X-ray | Involvement of supporting tissue of the lung parenchyma resulting in fine or coarse reticular opacities or small nodules |
PCP is seen in AIDS patients with a CD4+ count less than | < 200 |
Common source of Legionella pneumophila infection | Contaminated WATER SOURCE, such as A/C. Suspect in cases of recent cruise travel, hotel stay. |
Fever >39 (102F), bradycardia relative to the high fever, headache, confusion, and watery diarrhea. Labs: Hyponatremia, and gram stain with neutrophilia but no organisms. | Legionella pneumophila infection |
What are the most characteristic findings in L. pneumophila infection? | Contaminated water source, pyrexia (>102F), and HYPONATREMIA |
What medium is used to grow Legionella? | Culture on BCYE, supplemented with L-cysteine and Iron |
What common test is used to Dx Legionella? | Urine analysis to detect Legionella antigen in urine |
What kind of bacteria are most common to cause lung abscesses? | ANAEROBES |
Which anaerobes are most commonly seen in lung abscesses? | Peptostreptococcus, Prevotella, BACTEROIDES,and Fusobacterium. |
There risk of ____________________ leads to an increase risk of lung abscess formation. | Aspiration |
What conditions increase risk of Aspiration, thus developing lung abscesses by anaerobes? | Alcoholism, drug abuse, SEIZURE disorder, stroke and dementia. |
What is the clinical profile of a aspiration patient with formed lung abscess? | Indolent fever, night sweats, weigh loss, and productive cough with FOUL-smelling odor |
Foul-smelling odor in sputum is often indicative of _______________ infection. | ANAEROBE |
Form of primary ciliary dyskinesia is: | Kartagener syndrome |
Kartagener syndrome is characterized by? | 1. Situs inversus 2. Chronic sinusitis 3. Bronchiectasis 4. Infertility in men and women |
Why is the infertility present in Kartagener syndrome? | Impaired ciliary movement leads: Men --> impaired sperm motility Women --> Immobility of Fallopian Tube cilia |
What vessel in fetal circulation carries highly oxygenated blood? | Umbilical vein |
Deoxygenated blood in fetal circulation is carried by the umbilical _________________, (____). | Arteries (2) |
The umbilical vein drains directly into the ___________, via the ________________, and bypases the _______________, to reach the placenta. | IVC; Ductus venosus; Liver |
Dynein arm defect affecting the cilia | Kartagener syndrome |
Dextrocardia is a common finding of: | Kartagener syndrome |
Asbestosis represents a risk for development of pleural disease and which malignancies? | BRONCHOGENIC CARCINOMA >>>>>> mesothelioma |
What lung malignancy is most common person with asbestos exposure? | Bronchogenic carcinoma |
Bronchogenic carcinoma is a ________________ lesion that is most commonly developed after prolonged _______________ exposure. | Central; Asbestos |
Mesothelioma is seen in the _________ of the lung, is the second most common malignancy seen in asbestos exposure over the years. | Periphery |
Bronchogenic carcinoma: | malignant neoplastic growth of bronchial epithelial cells. Classified dependending on the cell affected, thus categorized as Squamous cell ca or Small Cell Ca of the lung. |
What are the types of bronchogenic carcinoma? | 1. Small cell carcinoma 2. Non-small cell carcinoma |
Which are the most common Non-small cell carcinomas of the lung? | 1. Squamous cell carcinoma 2. Adenocarcinoma 3. Large cell anaplastic carcinoma |
1. Squamous cell carcinoma 2. Adenocarcinoma 3. Large cell anaplastic carcinoma | NSCC |
What is the most common type of Lung cancer in women and NONSMOKERS? | Adenocarcinoma (NSCC) |
Adenocarcinoma of the Lung: | Peripherally located; Presents with CLUBBING; MC in women and nonsmokers; Associated with Hypertrophic Osteoarthropathy. |
Squamous cell cancer of the lung presents with __________________, nad it is _______________ located. | HYPERCALCEMIA; Centrally |
What lung cancer is associated with development of Cushing syndrome, SIADH, and Lambert-Eaton MG? | Small cell carcinoma |
Peripherally located; Lung cancer presents with Gynecomastia and Galactorrhea. | Large cell carcinoma |
What part of the lung is above the level of the clavicle and 1st rib, through the Superior Thoracic aperture? | Lung APICE |
Knife wound between the Sternal border and the midclavicular section of the clavicle may injure the: | Lung pleura, causing: - Pneumothorax, tension pneumothorax, or Hemothorax |
CXR shows a cavitation with air-fluid level. Patient presents fever, cough, and copious sputum. Dx? | Lung Abscess |
Common used for Varenicline? | Smoking cessation |
Varenicline is a partial ________________ of the _____________ _______ receptors, which is used to aid in _________________________. | Agonist of the Nicotinic ACh receptors; Smoking cessation. |
What drug can be used for smoking cessation? | Varenicline |
First phase of lobar pneumonia is: | Congestion |
Congestion in lobar pneumonia: | Day 0-2; Bacteria secretes cytokines that cause an increase in permeability of capillary endothelium, leading to an abundance of RBCs and proteins. |
What gives the second phase of lobar pneumonia its appropriate naming? | Red Hepatization; Lung acquires a Liver-like appearance. It is red due to the excess amount of RBCs and other substances. |
What is the 3rd phase of lobar pneumonia? | Grey hepatization; RBC disintegrate and give a grayish color to the tissue. Also the neutrophils start been replaced by macrophages. |
What stage in lobar pneumonia do the neutrophils are replaced by macrophages? | Gray Hepatization |
Resolution | Last phase of Lobar pneumonia pathogenesis |
Underlying cause of the development of Pulmonary HTN? | Systemic Sclerosis |
What is a common syndrome, that causes Pulmonary HTN, due to is pathogenesis? | CREST syndrome |
What is the common presentation of CREST syndrome? (main symptoms) | Calcinosis Raynaud phenomenon --> fingertip ulcers Esophageal dysmotility Sclerodactyly, Sclerosis, Skin tightening Telangiectasias |
Common findings in physical examination of pulmonary HTN: | Second heart sound Right-sided Heart failure signs such as EDEMA without Pulmonary edema and Hepatomegaly |
Heart failure in pulmonary HTN is due to | Cor pulmonale |
Bordetella pertussis infection in an adult is usually due to: | Missed vaccination booster |
Paroxysmal cough for more than 2 weeks, associated with posttussive emesis, and an inspiratory whoop after severe coughing episode. Dx. | Pertussis |
Bordetella pertussis is a_______________________. | Gram negative coccobacillus |
The Pertussis toxin (virulence factor) causes: | Excessive adenyl cyclase activity, which prevents phagocytosis and allows for bacterial survival |
COPD has a decreased ______________ ratio. | FEV1/FVC |
Main cause of Hypercalcemia in Sarcoidosis? | Increased intestinal absorption of Ca2+ by activated macrophages. |