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Hemodynamic disturbances- 1
Prof. Shahina Yasmin
Congestion, Hemorrhage, Edema
Hemodynamic disturbances
• Problems related to the flow of blood and
consequences thereof. Include:
• Hyperemia /congestion
• Hemorrhage
• Edema
• Thrombosis
• Embolism
• Infarction
• Shock
Hyperemia
• An active process resulting from
augmented tissue inflow due to arteriolar
dilatation causing increased volume of
blood in a particular tissue.
• Area is red due to oxygenated blood
• E.g. exercise, inflammation
CONGESTION
• A passive process resulting from impaired
outflow of venous blood from a tissue causing
increased volume of blood in that tissue.
• Poor oxygenation – blue red in color cyanosis
hypoxia - cellular degeneration - secondary
fibrosis
• Elevated intravascular pressure- capillary
rupture - focal hemorrhage
• Cardiac failure, local venous obstruction.
MOPRHOLOGY
Gross: cut surfaces are wet and hemorrhagic
Microscopic:
Acute Pulmonary congestion
 alveolar capillary dilatation with blood
 alveolar septal edema
 intra alveolar hemorrhage.
Chronic Pulmonary congestion
 Septa thickened and fibrotic, alveolar
septal edema.
 Hemosiderin laden macrophages in
alveolar spaces - heart failure cells.
Acute pulmonary congestion and edema -
Medium power, hemosiderin laden Macrophages
Acute hepatic congestion:
 Distention of central vein and sinusoids with blood,
Central hepatocyte degeneration, Fatty change in
peri-portal hepatocytes
Chronic hepatic congestion:
 Gross: central region of hepatic lobule is red brown
and depressed – surrounding zones uncongested.
Nutmeg Liver
 Microscopic: Centri-lobular necrosis, hepatocyte drop
out, hemorrhages, hemosiderin laden macrophages,
hepatic fibrosis -Cardiac Cirhosis
MORPHOLOGY…
Chronic hepatic congestion:
Hemostasis: process of blood clotting preventing
excessive bleeding after blood vessel damage
Hemorrhage: Extravasations of blood because
of vessel rupture.
External
Internal
Capillary hemorrhage - Chronic congestion
Large artery and vein – injury of blood vessels,
atherosclerosis, inflammation, neoplastic
erosion
Petechiae: minute hemorrhage into the skin 1-2
mm, mucous membrane or serosal surfaces.
Extensive white matter petechial hemorrhages.
• Purpura: slightly larger hemorrhages 3-5 mm.
Due to trauma, inflammation, increased
capillary fragility.
• Ecchymoses. 1-2 cm subcutaneous
hemorrhages. hematomas bruises ) RBC 
Degraded  Phagocytosed by macrophages 
Hemoglobin ( red blue color)  Bilirubin ( blue
green )  Hemosidern ( gold brown). appear
with coagulation disorders
• Larger accumulations in body cavities
Hemothorax, hemopericardium,
hemoperitoneum, Hemarthrosis.
The blotchy areas of hemorrhage in the skin -
Ecchymoses
Hematoma : an extra-vascular hemorrhage
enclosed in the tissue.
Subdural Hematoma
Clinical Significance of Hemorrhage
Depends on :
 Volume of blood loss:
• Greater loss  hemorrhagic – hypovolemic shock.
• Small amount, Subcutaneous  Trivial effect.
 Rate of blood loss: Rapid loss of small blood,
gradual volume loss of larger blood  little effect
on healthy person.
 Site of hemorrhage.
• Brain  Skull unyielding  increase Intracranial
Pressure.
• external loss - Iron deficiency anemia
• Internal in body cavities /tissue - Iron reuse.
.
Edema
• Accumulation of fluid in the interstitial space or
body cavities
• Variously named according to the site:
• Hydrothorax
• Hydropericardium
• Hydroperitoneum /Ascites
• Total body water = 60% of body weight
• Intracellular = 40%
• Extracellular = 20% (Plasma 5% + Inters 10%)
Edema
• Two types
• 1. Localized edema involves an increase of fluid
in extracellular space locally
• 2. Generalized edema is due to increase in both
total body water and sodium
• Anasarca: Severe and generalized edema with
subcutaneous swelling
Fluid movement in body
• There is free exchange of water, electrolytes and
small molecules between intra and extracellular
compartments of body.
• Primary site - capillaries
• Fluid movement is governed by two forces
–Hydrostatic pressure
–Colloid osmotic pressure
• Overflow through lymphatics
CAPILLARY
VENOUS END ARTER.END
Hydrostatic pressure 35 mm
Osmotic pressure 25mm
Hydrostatic pressure 12mm
Osmotic pressure 25mm
Interstitial fluid
6 mm
CAPILLARY BED
Hydrostatic
pressure
Plasma colloid
osmotic pressure
Incresed
interstitial
fluid pressure
To
Thoracic duct
VENOUS END
ARTER.END
Pathogenesis of edema
Causes of edema
• Increased hydrostatic pressure
• Decreased osmotic pressure
• Lymphatic obstruction
• Sodium retention
• Inflammation
1.Increased Hydrostatic pressure.
a. Local increase – venous obstruction or
compression.
i. Thrombosis
ii. External Pressure (Tumor, mass, torniquet etc)
iii. Venous return due to lower extremity inactivity
iv. Arteriolar dilatiation, Heat Neurohumoral dys-
regulation.
b. General increase.
i. Congestive cardiac failure.
ii. Constrictive pericarditis.
iii. Ascites ( liver cirhosis).
Reduced osmotic pressure
• Protein loss /deficiency/ hypoproteinemia due to
• Protein losing glomerulopathies
Glomerulonephritis, nephrotic syndrome
• Liver cirrhosis – reduced synthesis
• Malnutrition
• Malabsorption, Protein losing gastroenteropathy,
Lymphatic obstruction
Impaired drainage – lymphedema.
• Inflammatory ( Filariasis  elephantiasis)
• Neoplastic
• Post-surgical, lymph node resection
• Post-irradiation
Sodium and water retention
• Salt intake
• Renal insufficiency: Acut Renal Failure,
Poststreptococal glomerulonephritis
• Renal hypoperfusion
• Tubular reabsorption: Renin-agiotensin-
aldosterone hyperactivity
Inflammation
dilatation of vessels by mediators
• Acute
• Chronic (healing with angiogenesis)
• Allergic
Clinical Correlation:
• Mild to fatal
• Indication of underlying cardiac or renal
disease, Infection, neoplasm
• Impaired healing
• Pulmonary edema: Interference with
respiration
• Compression of blood supply. ischemia
MORPHOLOGY
• Most commonly encountered in
subcutaneous tissue, brain and lungs.
• Most easily recognized on naked eye
appearance.
• Microscopically: Edematous tissue
appears as subtle cell swelling with
clearing and separation of ECM elements
Subcutaneous edema: It may be
 Diffuse : e.g. in nephritic syndrome
 Of dependent parts, in legs, sacrum e.g. CCF
 Periorbital: renal dysfunction
 Pitting by Finger pressure displacing interstitial
fluid.
fluid collection, a friction blister of skin
trivial example of edema.
simple edema, or fluid collection within tissues.
Pitting on pressure
Pulmonary Edema
Lungs are 2-3 times heavier, frothy and
blood tinged fluid escapes on cross –
sectioning.
e.g. in ARDS, LVF, renal failure.
Microscopic: Alveoli filled with edema
fluid ( light pink) and few RBCs.
Congested blood vessels.
Cerebral edema
It may be
Localized ~ at site of lesion e.g.
abscess , neoplasms
Generalized~ e.g. in encephalitis,
hypertensive crisis, or venous outflow
obstruct.
Brain is grossly swollen with narrowed
sulci and distended gyri.
cerebral edema seen at the right
which obscures the structures. There
is a shift of the midline to the left.
marked laryngeal edema such
that the airway is narrowed. This
is life-threatening.
1. hemodynamic disorders edema, congestion.pptx

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1. hemodynamic disorders edema, congestion.pptx

  • 1. Hemodynamic disturbances- 1 Prof. Shahina Yasmin Congestion, Hemorrhage, Edema
  • 2. Hemodynamic disturbances • Problems related to the flow of blood and consequences thereof. Include: • Hyperemia /congestion • Hemorrhage • Edema • Thrombosis • Embolism • Infarction • Shock
  • 3. Hyperemia • An active process resulting from augmented tissue inflow due to arteriolar dilatation causing increased volume of blood in a particular tissue. • Area is red due to oxygenated blood • E.g. exercise, inflammation
  • 4.
  • 5.
  • 6. CONGESTION • A passive process resulting from impaired outflow of venous blood from a tissue causing increased volume of blood in that tissue. • Poor oxygenation – blue red in color cyanosis hypoxia - cellular degeneration - secondary fibrosis • Elevated intravascular pressure- capillary rupture - focal hemorrhage • Cardiac failure, local venous obstruction.
  • 7. MOPRHOLOGY Gross: cut surfaces are wet and hemorrhagic Microscopic: Acute Pulmonary congestion  alveolar capillary dilatation with blood  alveolar septal edema  intra alveolar hemorrhage. Chronic Pulmonary congestion  Septa thickened and fibrotic, alveolar septal edema.  Hemosiderin laden macrophages in alveolar spaces - heart failure cells.
  • 8. Acute pulmonary congestion and edema - Medium power, hemosiderin laden Macrophages
  • 9. Acute hepatic congestion:  Distention of central vein and sinusoids with blood, Central hepatocyte degeneration, Fatty change in peri-portal hepatocytes Chronic hepatic congestion:  Gross: central region of hepatic lobule is red brown and depressed – surrounding zones uncongested. Nutmeg Liver  Microscopic: Centri-lobular necrosis, hepatocyte drop out, hemorrhages, hemosiderin laden macrophages, hepatic fibrosis -Cardiac Cirhosis MORPHOLOGY…
  • 11. Hemostasis: process of blood clotting preventing excessive bleeding after blood vessel damage Hemorrhage: Extravasations of blood because of vessel rupture. External Internal Capillary hemorrhage - Chronic congestion Large artery and vein – injury of blood vessels, atherosclerosis, inflammation, neoplastic erosion Petechiae: minute hemorrhage into the skin 1-2 mm, mucous membrane or serosal surfaces.
  • 12. Extensive white matter petechial hemorrhages.
  • 13. • Purpura: slightly larger hemorrhages 3-5 mm. Due to trauma, inflammation, increased capillary fragility. • Ecchymoses. 1-2 cm subcutaneous hemorrhages. hematomas bruises ) RBC  Degraded  Phagocytosed by macrophages  Hemoglobin ( red blue color)  Bilirubin ( blue green )  Hemosidern ( gold brown). appear with coagulation disorders • Larger accumulations in body cavities Hemothorax, hemopericardium, hemoperitoneum, Hemarthrosis.
  • 14. The blotchy areas of hemorrhage in the skin - Ecchymoses
  • 15. Hematoma : an extra-vascular hemorrhage enclosed in the tissue. Subdural Hematoma
  • 16. Clinical Significance of Hemorrhage Depends on :  Volume of blood loss: • Greater loss  hemorrhagic – hypovolemic shock. • Small amount, Subcutaneous  Trivial effect.  Rate of blood loss: Rapid loss of small blood, gradual volume loss of larger blood  little effect on healthy person.  Site of hemorrhage. • Brain  Skull unyielding  increase Intracranial Pressure. • external loss - Iron deficiency anemia • Internal in body cavities /tissue - Iron reuse. .
  • 17. Edema • Accumulation of fluid in the interstitial space or body cavities • Variously named according to the site: • Hydrothorax • Hydropericardium • Hydroperitoneum /Ascites • Total body water = 60% of body weight • Intracellular = 40% • Extracellular = 20% (Plasma 5% + Inters 10%)
  • 18. Edema • Two types • 1. Localized edema involves an increase of fluid in extracellular space locally • 2. Generalized edema is due to increase in both total body water and sodium • Anasarca: Severe and generalized edema with subcutaneous swelling
  • 19. Fluid movement in body • There is free exchange of water, electrolytes and small molecules between intra and extracellular compartments of body. • Primary site - capillaries • Fluid movement is governed by two forces –Hydrostatic pressure –Colloid osmotic pressure • Overflow through lymphatics
  • 20. CAPILLARY VENOUS END ARTER.END Hydrostatic pressure 35 mm Osmotic pressure 25mm Hydrostatic pressure 12mm Osmotic pressure 25mm Interstitial fluid 6 mm
  • 21. CAPILLARY BED Hydrostatic pressure Plasma colloid osmotic pressure Incresed interstitial fluid pressure To Thoracic duct VENOUS END ARTER.END
  • 22. Pathogenesis of edema Causes of edema • Increased hydrostatic pressure • Decreased osmotic pressure • Lymphatic obstruction • Sodium retention • Inflammation
  • 23. 1.Increased Hydrostatic pressure. a. Local increase – venous obstruction or compression. i. Thrombosis ii. External Pressure (Tumor, mass, torniquet etc) iii. Venous return due to lower extremity inactivity iv. Arteriolar dilatiation, Heat Neurohumoral dys- regulation. b. General increase. i. Congestive cardiac failure. ii. Constrictive pericarditis. iii. Ascites ( liver cirhosis).
  • 24. Reduced osmotic pressure • Protein loss /deficiency/ hypoproteinemia due to • Protein losing glomerulopathies Glomerulonephritis, nephrotic syndrome • Liver cirrhosis – reduced synthesis • Malnutrition • Malabsorption, Protein losing gastroenteropathy,
  • 25. Lymphatic obstruction Impaired drainage – lymphedema. • Inflammatory ( Filariasis  elephantiasis) • Neoplastic • Post-surgical, lymph node resection • Post-irradiation
  • 26. Sodium and water retention • Salt intake • Renal insufficiency: Acut Renal Failure, Poststreptococal glomerulonephritis • Renal hypoperfusion • Tubular reabsorption: Renin-agiotensin- aldosterone hyperactivity
  • 27. Inflammation dilatation of vessels by mediators • Acute • Chronic (healing with angiogenesis) • Allergic
  • 28. Clinical Correlation: • Mild to fatal • Indication of underlying cardiac or renal disease, Infection, neoplasm • Impaired healing • Pulmonary edema: Interference with respiration • Compression of blood supply. ischemia
  • 29. MORPHOLOGY • Most commonly encountered in subcutaneous tissue, brain and lungs. • Most easily recognized on naked eye appearance. • Microscopically: Edematous tissue appears as subtle cell swelling with clearing and separation of ECM elements Subcutaneous edema: It may be  Diffuse : e.g. in nephritic syndrome  Of dependent parts, in legs, sacrum e.g. CCF  Periorbital: renal dysfunction  Pitting by Finger pressure displacing interstitial fluid.
  • 30. fluid collection, a friction blister of skin trivial example of edema.
  • 31. simple edema, or fluid collection within tissues. Pitting on pressure
  • 32. Pulmonary Edema Lungs are 2-3 times heavier, frothy and blood tinged fluid escapes on cross – sectioning. e.g. in ARDS, LVF, renal failure. Microscopic: Alveoli filled with edema fluid ( light pink) and few RBCs. Congested blood vessels.
  • 33. Cerebral edema It may be Localized ~ at site of lesion e.g. abscess , neoplasms Generalized~ e.g. in encephalitis, hypertensive crisis, or venous outflow obstruct. Brain is grossly swollen with narrowed sulci and distended gyri.
  • 34. cerebral edema seen at the right which obscures the structures. There is a shift of the midline to the left.
  • 35. marked laryngeal edema such that the airway is narrowed. This is life-threatening.