Med Path Flashcards
Anascarca
Ascites
Severe and generalized edema with widespread subcutaneous tissue swelling
Hydroperitoneum
What is very common cause hypoperfusion of kidney?
CHF
Transudate
Purulent
Protein poor (usually pressure)
Rich in cells
Causes of reduced plasma osmotic pressure
Nephortic syndrome (leaky kidney)
Severe liver disease (e.g. cirrhosis)
Malnutrition
Protein-losing gastroenteropathy
Elephantiasis
A limb or other part of the body becomes grossly enlarged due to obstruction of the lymphatic vessels
Dependent edema
Pitting edema
Dependent - influcenced by gravity
Pressure leaves displaced fluid
Where do edema often is manifested?
In loose connective tissue matrix (e.g. periorbital edema)
Lymphatic obstruction edema causes
Inflammatory
Neoplastic
Postsurgical
Postirradiation
Increased hydrostatic pressure edema
Impaired venous return: CHF, constrictive pericarditis, ascites (liver cirrhosis), venous obstruction
Arteriolar dilation: heat, nerohymoral dyregulation
Hyperemia
Excess of blood
Active or Passive?
Hyperemia
Congestion
Hyperemia – Active process = increased blood flow
Congestion – Passive process = reduced outflow of blood
What is the resut of long-standing chronic passive congestion?
Chronic hypoxia leading to ischemic tissue injury and scarrying
petechiae
purpura
ecchymoses
1-2 mm hemorrhages – low platelet, local increased intravascular pressure
3mm+ – secondary to trauma, vascular inflammation, increased vascular fragility
1-2cm (bruises) – subcutaneous hematomas
Antithrombotic properties
ANTITHROMBOTIC
Antiplatelet: prostacyclin and nitric oxide, adenosine diphosphatase
Anticogulant: heparin-like molecules, thrombomodulin, tissue factor pathway inhibitor
Fibrinolytic effects: tissue-type plasminogen activator t-PA (plasminogen->plasmin)
PROTHROMBOTIC
Platelet: vWF
Procoagulant effect: tissue factors
Antifibrinolytic effects: inhibitors of plasminogen activator (PAIs)
Prothrombin time (PT)
Partial thromboplastin time (PTT)
PT – function of the proteins in the extrinsic pathway
PTT – intrinsic pathway