Difference between revisions of "Lungs Circulatory - Pathology"

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#REDIRECT[[:Category:Lungs - Circulatory Pathology]]
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{{unfinished}}
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==[[Pulmonary Hyperaemia]]==
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==[[Pulmonary Congestion]]==
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==[[Pulmonary Oedema]]==
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==[[Pulmonary Haemorrhage]]==
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==Embolism, thrombosis and infarction==
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[[Image:Pulmonary infarction.jpg|right|thumb|100px|<small><center>Pulmonary infarction (Image sourced from Bristol Biomed Image Archive with permission)</center></small>]]
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[[Image:Segmental pulmonary infarction.jpg|right|thumb|100px|<small><center>Segmental pulmonary infarction (Image sourced from Bristol Biomed Image Archive with permission)</center></small>]]
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*Lungs are strategically situated to catch emboli carried in venous blood
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*Because the lung is supplied by both pulmonary and bronchial arteries and has extensive collateral channels, infarction usually does not follow embolism or thrombosis unless pulmonary circulation is already compromised
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*In animals, greatest risk comes from:
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**'''Tumor emboli'''
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***From e.g.: osteosarcoma and haemangiosarcoma in dogs, uterine carcinoma in cattle
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**'''Septic emboli''' 
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***From bacterial [[Endocarditis|endocarditis]], jugular thrombophlebitis, [[Hepatic Abscessation|hepatic abscesses]] etc.
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***May cause unexpected death if in large numbers
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***May develop [[Lungs Inflammatory - Pathology|suppurative pneumonia]] -> [[Lungs Inflammatory - Pathology#Pulmonary abscesses|pulmonary abscesses]], [[Arteritis|arteritis]], [[Thrombosis|thrombosis]]
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*Pulmonary infarcts usually occur when there is embolisation or thrombosis during general circulatory collapse or passive congestion of heart failure
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*Pulmonary thromboembolism is a sequel to in cattle to large emboli from liver abscesses close to the vena cava
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**Death may ocur due to massive haemorrhaging into lung tissue
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*Parasites (e.g. [[Respiratory Parasitic Infections - Pathology#Dirofilaria immitis|''Dirofilaria immitis'']], [[Respiratory Parasitic Infections - Pathology#Angiostrongylus vasorum|''Angiostrongylus vasorum'']]) may be responsible
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*Long-term intravenous catheterisation may cuse thrombi pieces breaking off and lodging in pulmonary vessels
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[[Category:Lungs - Circulatory Pathology]]
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==Pulmonary hypertension==
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*Caused by '''left-to-right vascular shunts''' or increased resistance of the pulmonary vascular system
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*In animals, it is most commonly a sequel of '''widespread fibrosis in the lung''' or [[Bronchitis#Chronic bronchitis|chronic bronchitis or bronchiolitis]] which stimulates hypertrophy in the walls of small arteries
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*Severe prolonged pulmonary hypertension leads to [[Cor Pulmonale|'''cor pulmonale''']], right-sided heart failure secondary to primary lung disease
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[[Category:Lungs - Circulatory Pathology]]
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==Test yourself with the Lungs Pathology Flashcards==
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[[Lungs_Flashcards_-_Pathology|Lungs Pathology Flashcards]]
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[[Category:Lungs - Degenerative Pathology]]
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[[Category:Respiratory System - Degenerative Pathology]]

Revision as of 17:08, 19 February 2011



Pulmonary Hyperaemia

Pulmonary Congestion

Pulmonary Oedema

Pulmonary Haemorrhage

Embolism, thrombosis and infarction

Pulmonary infarction (Image sourced from Bristol Biomed Image Archive with permission)
Segmental pulmonary infarction (Image sourced from Bristol Biomed Image Archive with permission)
  • Lungs are strategically situated to catch emboli carried in venous blood
  • Because the lung is supplied by both pulmonary and bronchial arteries and has extensive collateral channels, infarction usually does not follow embolism or thrombosis unless pulmonary circulation is already compromised
  • In animals, greatest risk comes from:
  • Pulmonary infarcts usually occur when there is embolisation or thrombosis during general circulatory collapse or passive congestion of heart failure
  • Pulmonary thromboembolism is a sequel to in cattle to large emboli from liver abscesses close to the vena cava
    • Death may ocur due to massive haemorrhaging into lung tissue
  • Parasites (e.g. Dirofilaria immitis, Angiostrongylus vasorum) may be responsible
  • Long-term intravenous catheterisation may cuse thrombi pieces breaking off and lodging in pulmonary vessels




Pulmonary hypertension

  • Caused by left-to-right vascular shunts or increased resistance of the pulmonary vascular system
  • In animals, it is most commonly a sequel of widespread fibrosis in the lung or chronic bronchitis or bronchiolitis which stimulates hypertrophy in the walls of small arteries
  • Severe prolonged pulmonary hypertension leads to cor pulmonale, right-sided heart failure secondary to primary lung disease


Test yourself with the Lungs Pathology Flashcards

Lungs Pathology Flashcards