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Pathology - Cystic Fibrosis ( CF)
Pathophysiology
The CFTR gene has an autosomal recessive mutation that causes this multisystem genetic disease. CFTR, a Cl– channel that controls the release of water and salt, is expressed in a number of epithelia throughout the body. Reduced fluid secretion due to mutations in this gene causes viscous mucus to build up in the GI tract, reproductive system, pancreatic ducts, and lungs. This dense mucus in the lungs works to block the medium- and large-sized airways' ability to breathe, leading to wheezing and rhonchi as well as other frequent obstructive lung disease aftereffects.
One of the architectural lung abnormalities associated with cystic fibrosis (CF) is bronchiectasis, which can lead to pulmonary vascular exposure and hemoptysis.
Hypoxemia and recurrent lung Infections with pseudomonas aeruginosa are also frequently observed in this illness. Malabsorption and stunted growth may be caused by exocrine pancreatic and gastrointestinal tract dysfunction. Male infertility results from a vas deferens defect that is congenital. Clubbing of the fingernails is a typical observation in this and other chronic hypoxemic lung disorders, however its exact cause is unknown.
Pathophysiology
The CFTR gene has an autosomal recessive mutation that causes this multisystem genetic disease. CFTR, a Cl– channel that controls the release of water and salt, is expressed in a number of epithelia throughout the body. Reduced fluid secretion due to mutations in this gene causes viscous mucus to build up in the GI tract, reproductive system, pancreatic ducts, and lungs. This dense mucus in the lungs works to block the medium- and large-sized airways' ability to breathe, leading to wheezing and rhonchi as well as other frequent obstructive lung disease aftereffects.
One of the architectural lung abnormalities associated with cystic fibrosis (CF) is bronchiectasis, which can lead to pulmonary vascular exposure and hemoptysis.
Hypoxemia and recurrent lung Infections with pseudomonas aeruginosa are also frequently observed in this illness. Malabsorption and stunted growth may be caused by exocrine pancreatic and gastrointestinal tract dysfunction. Male infertility results from a vas deferens defect that is congenital. Clubbing of the fingernails is a typical observation in this and other chronic hypoxemic lung disorders, however its exact cause is unknown.
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Pathology - Acute Airway Obstruction
Pathophysiology
The most common cause of acute airway blockage is inadvertent intake of a foreign body. It is possible that the child in the vignette swallowed a toy and inhaled it into their airway. Because the right main stem bronchus follows the tracheal bifurcation in an almost straight downward path, ingested foreign materials tend to lodge in this bronchus. The SNS reactions of airway dilatation, decreased airway secretion, increased respiratory rate, and increased heart rate are brought on by acute blockage, which results in instantaneous impairment of both ventilation and oxygenation. The reason for central pallor is decreased oxygenation.
The absence of breath sounds in the right lung fields is indicative of an obstruction of the right main stem bronchus, necessitating prompt removal of the foreign body. Obtundation may arise from hypercarbia in the event of a severe impairment in breathing. Along with physiologic decompensation, collapse of blocked lung tissue may occur, necessitating invasive procedures to restore lung expansion.
Pathophysiology
The most common cause of acute airway blockage is inadvertent intake of a foreign body. It is possible that the child in the vignette swallowed a toy and inhaled it into their airway. Because the right main stem bronchus follows the tracheal bifurcation in an almost straight downward path, ingested foreign materials tend to lodge in this bronchus. The SNS reactions of airway dilatation, decreased airway secretion, increased respiratory rate, and increased heart rate are brought on by acute blockage, which results in instantaneous impairment of both ventilation and oxygenation. The reason for central pallor is decreased oxygenation.
The absence of breath sounds in the right lung fields is indicative of an obstruction of the right main stem bronchus, necessitating prompt removal of the foreign body. Obtundation may arise from hypercarbia in the event of a severe impairment in breathing. Along with physiologic decompensation, collapse of blocked lung tissue may occur, necessitating invasive procedures to restore lung expansion.
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Pathology - Bronchiectasis
An irreversible enlargement of many airways, transmural bronchial inflammation or infection, and persistent mucopurulent sputum production are the hallmarks of bronchiectasis. Bronchiectasis is a common pathologic finding in CF. This condition is often classified into two classes: that which is caused by CF and that which is not CF related. Instead of having cystic fibrosis (CF), the patient in the vignette has chronic lung disease (COPD), which involves long-term inflammation that eventually damages the airways and causes cilia malfunction. The damage that results increases the lung's susceptibility to recurring infections, which are frequently observed in this illness. The same factors that make patients with pulmonary tuberculosis (TB) more prone to bronchiectasis also make them more vulnerable to inflammation and persistent lung infections. The cause of clubbing of the digits is unknown, yet it is observed in certain chronic pulmonary diseases (lung cancer, severe TB, and CF). To maintain lung function in these patients, aggressive secretion control and prompt infection detection are critical.
An irreversible enlargement of many airways, transmural bronchial inflammation or infection, and persistent mucopurulent sputum production are the hallmarks of bronchiectasis. Bronchiectasis is a common pathologic finding in CF. This condition is often classified into two classes: that which is caused by CF and that which is not CF related. Instead of having cystic fibrosis (CF), the patient in the vignette has chronic lung disease (COPD), which involves long-term inflammation that eventually damages the airways and causes cilia malfunction. The damage that results increases the lung's susceptibility to recurring infections, which are frequently observed in this illness. The same factors that make patients with pulmonary tuberculosis (TB) more prone to bronchiectasis also make them more vulnerable to inflammation and persistent lung infections. The cause of clubbing of the digits is unknown, yet it is observed in certain chronic pulmonary diseases (lung cancer, severe TB, and CF). To maintain lung function in these patients, aggressive secretion control and prompt infection detection are critical.
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Pathology - Hyperlipidemia
Pathophysiology
A condition known as hyperlipidemia is characterized by abnormal blood lipid levels. The fat-soluble compounds found in serum are carried by lipoproteins, which are protein capsules. When animal products are eaten, these lipoproteins are swallowed. The liver also produces lipoproteins. A lipoprotein's density (e.g., HDL or LDL) is determined by its size. Its function in metabolism is dictated by the density and related apolipoproteins that are present in a particular molecule. One can classify aberrant blood lipid levels as primary (genetic) or secondary (resulting from a medical disease like diabetes or obesity). Other lipid compounds are transported from the blood to the liver by HDL.
The coronary artery disease is prevented by these particles. Since LDL are atherogenic by nature, they stick to blood vessel walls and promote the development of endothelial plaques. Most persons should modify their increased LDL or decreased HDL to lower their risk of cardiovascular issues; this is typically accomplished with medicine (statins, HMG-CoA reductase inhibitors, lower cholesterol synthesis, and LDL levels, for example).
Pathophysiology
A condition known as hyperlipidemia is characterized by abnormal blood lipid levels. The fat-soluble compounds found in serum are carried by lipoproteins, which are protein capsules. When animal products are eaten, these lipoproteins are swallowed. The liver also produces lipoproteins. A lipoprotein's density (e.g., HDL or LDL) is determined by its size. Its function in metabolism is dictated by the density and related apolipoproteins that are present in a particular molecule. One can classify aberrant blood lipid levels as primary (genetic) or secondary (resulting from a medical disease like diabetes or obesity). Other lipid compounds are transported from the blood to the liver by HDL.
The coronary artery disease is prevented by these particles. Since LDL are atherogenic by nature, they stick to blood vessel walls and promote the development of endothelial plaques. Most persons should modify their increased LDL or decreased HDL to lower their risk of cardiovascular issues; this is typically accomplished with medicine (statins, HMG-CoA reductase inhibitors, lower cholesterol synthesis, and LDL levels, for example).
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Pathology - Ischemic Heart Disease
Pathophysiology
This disease is characterized by ischemia, or a decreased blood supply, which is typically brought on by coronary artery atherosclerosis. Growing older, smoking, having high blood pressure, diabetes, and having high cholesterol are risk factors. The lumen of the channel narrows in coronary arteries due to the development of fat-rich plaques in the vessel walls.
With time, this narrowing may get to the point that oxygen-rich blood is unable to get to the heart's tissues, leading to ischemia and, eventually, myocardial tissue infarction, or death. On the other hand, acute vessel obstruction can result from vessel plaques that "rupture," discharging fatty contents into coronary channels. The patient in the vignette had coronary artery bypass grafting (CABG) to open up a patent, unobstructed coronary blood channel. Although the right coronary artery distribution on his ECG displays signs of an infarction (Q waves in inferior leads), the chamber wall movement of his echocardiography appears normal, indicating that either the damage is not severe or is offset by surrounding myocardial tissue.
This conclusion is supported by a normal cardiac ejection fraction. His ECG shows indications of LV hypertrophy, which is most likely the result of chronic hypertension. It shows the deepest S wave in leads V1 or V2 and the greatest R wave in leads V5 or V6, both of which equal more than 35 mm. His prescriptions include aspirin for antiplatelet therapy, metoprolol as a beta-blocker, lisinopril as an ACE inhibitor, and simvastatin as an HMG-CoA reductase inhibitor. In individuals with a history of myocardial ischemia, each of these drugs has been shown to be beneficial in preventing further cardiovascular events.
Pathophysiology
This disease is characterized by ischemia, or a decreased blood supply, which is typically brought on by coronary artery atherosclerosis. Growing older, smoking, having high blood pressure, diabetes, and having high cholesterol are risk factors. The lumen of the channel narrows in coronary arteries due to the development of fat-rich plaques in the vessel walls.
With time, this narrowing may get to the point that oxygen-rich blood is unable to get to the heart's tissues, leading to ischemia and, eventually, myocardial tissue infarction, or death. On the other hand, acute vessel obstruction can result from vessel plaques that "rupture," discharging fatty contents into coronary channels. The patient in the vignette had coronary artery bypass grafting (CABG) to open up a patent, unobstructed coronary blood channel. Although the right coronary artery distribution on his ECG displays signs of an infarction (Q waves in inferior leads), the chamber wall movement of his echocardiography appears normal, indicating that either the damage is not severe or is offset by surrounding myocardial tissue.
This conclusion is supported by a normal cardiac ejection fraction. His ECG shows indications of LV hypertrophy, which is most likely the result of chronic hypertension. It shows the deepest S wave in leads V1 or V2 and the greatest R wave in leads V5 or V6, both of which equal more than 35 mm. His prescriptions include aspirin for antiplatelet therapy, metoprolol as a beta-blocker, lisinopril as an ACE inhibitor, and simvastatin as an HMG-CoA reductase inhibitor. In individuals with a history of myocardial ischemia, each of these drugs has been shown to be beneficial in preventing further cardiovascular events.
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Pathology - Cardiogenic Shock
Pathophysiology
This kind of shock happens when the heart's pumping capacity is insufficient to keep tissues and organs perfused. This is most frequently caused by a large-scale left ventricular myocardial infarction, though mitral valve rupture or cardiac tamponade can also cause it.
The clinical presentation resembles that of hypovolemic shock, which is characterized by a broad underperfusion of bodily tissues and accompanying organ congestion brought on by venous blood backlog from the heart's incapacity to pump blood forward. The patient in the vignette experienced an abrupt decrease in blood flow and congestion, which led to congested lung fields, hypotension, and compensatory tachycardia. Reduced peripheral perfusion manifests physically as a weak pulse and chilly skin as blood is directed more into internal organs.
His oliguria is the result of both renal vasoconstriction, which lowers glomerular filtration, and hormonal attempts to hold onto free water (aldosterone production). The changed mental state of the patient is suggestive of inadequate cerebral perfusion. Vasoactive drugs like dopamine, epinephrine, or norepinephrine as well as intravenous fluid therapy are desperately needed to increase peripheral resistance and vascular volume in order to eventually restore central perfusion.
Pathophysiology
This kind of shock happens when the heart's pumping capacity is insufficient to keep tissues and organs perfused. This is most frequently caused by a large-scale left ventricular myocardial infarction, though mitral valve rupture or cardiac tamponade can also cause it.
The clinical presentation resembles that of hypovolemic shock, which is characterized by a broad underperfusion of bodily tissues and accompanying organ congestion brought on by venous blood backlog from the heart's incapacity to pump blood forward. The patient in the vignette experienced an abrupt decrease in blood flow and congestion, which led to congested lung fields, hypotension, and compensatory tachycardia. Reduced peripheral perfusion manifests physically as a weak pulse and chilly skin as blood is directed more into internal organs.
His oliguria is the result of both renal vasoconstriction, which lowers glomerular filtration, and hormonal attempts to hold onto free water (aldosterone production). The changed mental state of the patient is suggestive of inadequate cerebral perfusion. Vasoactive drugs like dopamine, epinephrine, or norepinephrine as well as intravenous fluid therapy are desperately needed to increase peripheral resistance and vascular volume in order to eventually restore central perfusion.
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Pathology - Hypovolemic Shock
Pathophysiology
When there is not enough vascular volume to give tissues and organs perfusion, this kind of shock happens. When blood is moved preferentially to internal organs, there are physical signs of diminished peripheral perfusion, such as a weak pulse and chilly skin.
This kind of shock frequently happens in situations involving severe injuries where a significant volume of blood is lost quickly.
Large volumes of lactic acid are produced as a result of enhanced anaerobic glycolysis brought on by inadequate tissue perfusion. This lactic acidosis can reduce peripheral vascular reactivity to catecholamines and impair cardiac function.
Reduced pulse pressure is one of the body's compensatory responses, which causes widespread vasoconstriction. Vital blood pressure is maintained by the tachycardia's early cardiac reaction. Bradycardia may occur in cases of severe hypovolemia in order to reduce blood loss. Vasoconstriction lowers glomerular filtration in the kidney, but if hypotension persists for an extended period of time, it can cause acute tubular injury and renal failure. Increased levels of the pressor hormones vasopressin, norepinephrine, and angiotensin II are among the hormonal alterations. Angiotensin II and ACTH levels cause an increase in aldosterone, which causes sodium retention and an increase in the volume of the ECF. Vasoactive drugs and intravenous fluid therapy are desperately needed to increase peripheral resistance and vascular volume in order to eventually restore central perfusion.
Pathophysiology
When there is not enough vascular volume to give tissues and organs perfusion, this kind of shock happens. When blood is moved preferentially to internal organs, there are physical signs of diminished peripheral perfusion, such as a weak pulse and chilly skin.
This kind of shock frequently happens in situations involving severe injuries where a significant volume of blood is lost quickly.
Large volumes of lactic acid are produced as a result of enhanced anaerobic glycolysis brought on by inadequate tissue perfusion. This lactic acidosis can reduce peripheral vascular reactivity to catecholamines and impair cardiac function.
Reduced pulse pressure is one of the body's compensatory responses, which causes widespread vasoconstriction. Vital blood pressure is maintained by the tachycardia's early cardiac reaction. Bradycardia may occur in cases of severe hypovolemia in order to reduce blood loss. Vasoconstriction lowers glomerular filtration in the kidney, but if hypotension persists for an extended period of time, it can cause acute tubular injury and renal failure. Increased levels of the pressor hormones vasopressin, norepinephrine, and angiotensin II are among the hormonal alterations. Angiotensin II and ACTH levels cause an increase in aldosterone, which causes sodium retention and an increase in the volume of the ECF. Vasoactive drugs and intravenous fluid therapy are desperately needed to increase peripheral resistance and vascular volume in order to eventually restore central perfusion.
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Pathology - Deep Vein Thrombosis
Pathophysiology
This disease is caused by a blood clot that forms in the deep veins, frequently with vessel wall inflammation. The two main clinical outcomes of this illness are postphlebitic syndrome and pulmonary embolization. Age, active cancer, recent surgery, immobility (such as during a lengthy flight), and genetic coagulation problems (antithrombin deficiency, proteins C or S deficits, for example) are risk factors for this illness. Individuals typically arrive with painful unilateral edema in their lower extremities (upper extremities can be affected less frequently). In the event of lung embolization, symptoms such as dyspnea and chest discomfort could manifest. Due to vascular impairment or injury, these individuals frequently have fever because inflammatory cytokines are released.
Anticoagulation is necessary for this condition in order to stop more clotting, and any underlying disorders must be managed as well. Patients with the condition who don't have a documented cause or risk factor need to be closely assessed. It is important to distinguish this illness from cellulitis, an infectious skin infection that can present quite similarly. Most of the time, appropriate laboratory testing and medical imaging can distinguish between the two illnesses.
Pathophysiology
This disease is caused by a blood clot that forms in the deep veins, frequently with vessel wall inflammation. The two main clinical outcomes of this illness are postphlebitic syndrome and pulmonary embolization. Age, active cancer, recent surgery, immobility (such as during a lengthy flight), and genetic coagulation problems (antithrombin deficiency, proteins C or S deficits, for example) are risk factors for this illness. Individuals typically arrive with painful unilateral edema in their lower extremities (upper extremities can be affected less frequently). In the event of lung embolization, symptoms such as dyspnea and chest discomfort could manifest. Due to vascular impairment or injury, these individuals frequently have fever because inflammatory cytokines are released.
Anticoagulation is necessary for this condition in order to stop more clotting, and any underlying disorders must be managed as well. Patients with the condition who don't have a documented cause or risk factor need to be closely assessed. It is important to distinguish this illness from cellulitis, an infectious skin infection that can present quite similarly. Most of the time, appropriate laboratory testing and medical imaging can distinguish between the two illnesses.
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Pathology - Essential Hypertension
Pathophysiology
Two or more blood pressure readings with a systolic blood pressure of more than 140 mm Hg or a diastolic blood pressure of more than 90 mm Hg are considered hypertensive. A physical examination or laboratory test is unable to identify the cause of hypertension in the majority of cases (>90%); hence, the illness is most likely complex. In contrast to patients who have evidence of an organic disease producing BP irregularities, these patients are said to have primary, or essential, hypertension. Total peripheral resistance and cardiac output are the factors that determine peripheral blood pressure as determined by a blood pressure cuff; so, a rise in either of these variables can raise measured blood pressure.
Arteriolar tone is the primary determinant of total peripheral resistance. Endocrine diseases (hyperthyroidism, for example) and disorders like beriberi, pregnancy, and A-V abnormalities in the bone (Paget's disease of the bone) can all have an impact on cardiac output. When there are no apparent and widespread reasons for elevated blood pressure (as determined by laboratory tests and physical examination), hypertension is considered essential.
Pathophysiology
Two or more blood pressure readings with a systolic blood pressure of more than 140 mm Hg or a diastolic blood pressure of more than 90 mm Hg are considered hypertensive. A physical examination or laboratory test is unable to identify the cause of hypertension in the majority of cases (>90%); hence, the illness is most likely complex. In contrast to patients who have evidence of an organic disease producing BP irregularities, these patients are said to have primary, or essential, hypertension. Total peripheral resistance and cardiac output are the factors that determine peripheral blood pressure as determined by a blood pressure cuff; so, a rise in either of these variables can raise measured blood pressure.
Arteriolar tone is the primary determinant of total peripheral resistance. Endocrine diseases (hyperthyroidism, for example) and disorders like beriberi, pregnancy, and A-V abnormalities in the bone (Paget's disease of the bone) can all have an impact on cardiac output. When there are no apparent and widespread reasons for elevated blood pressure (as determined by laboratory tests and physical examination), hypertension is considered essential.
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Pathology - Secondary Hypertension
Pathophysiology
It is secondary cause-related hypertension. Secondary hypertension is defined as raised blood pressure (systolic BP of >140 mm Hg or diastolic BP of >90 mm Hg) owing to a known cause, as opposed to primary/essential hypertension, which lacks a known cause. A hyperparathyroid condition may be the cause of secondary hypertension. Four parathyroid glands, which are found on the underside of the thyroid gland, produce PTH. PTH promotes calcium resorption in the distal nephron, releases calcium from the bone through osteoclastic stimulation (bone resorption), and boosts the conversion of active vitamin D to enhance calcium absorption from the gastrointestinal (GI) tract. Although the exact cause of this ailment is unknown, a considerable majority of individuals have hypertension as a result of the subsequent rise in serum calcium levels.
Hyperthyroidism, pharmaceutical use (NSAIDs, stimulants, decongestants, and other medications), aortic coarctation, hyperaldosteronism, hypercortisolism, and phaeochromocytoma are other known causes of hypertension. Compared to individuals with critical diseases, many patients with secondary hypertension present between the ages of 20 and 40.
Medication-assisted blood pressure control and repair of the underlying abnormalities causing the hypertension are both part of the treatment.
Pathophysiology
It is secondary cause-related hypertension. Secondary hypertension is defined as raised blood pressure (systolic BP of >140 mm Hg or diastolic BP of >90 mm Hg) owing to a known cause, as opposed to primary/essential hypertension, which lacks a known cause. A hyperparathyroid condition may be the cause of secondary hypertension. Four parathyroid glands, which are found on the underside of the thyroid gland, produce PTH. PTH promotes calcium resorption in the distal nephron, releases calcium from the bone through osteoclastic stimulation (bone resorption), and boosts the conversion of active vitamin D to enhance calcium absorption from the gastrointestinal (GI) tract. Although the exact cause of this ailment is unknown, a considerable majority of individuals have hypertension as a result of the subsequent rise in serum calcium levels.
Hyperthyroidism, pharmaceutical use (NSAIDs, stimulants, decongestants, and other medications), aortic coarctation, hyperaldosteronism, hypercortisolism, and phaeochromocytoma are other known causes of hypertension. Compared to individuals with critical diseases, many patients with secondary hypertension present between the ages of 20 and 40.
Medication-assisted blood pressure control and repair of the underlying abnormalities causing the hypertension are both part of the treatment.
