Disturbances in Circulation Flashcards
Too much blood; a lesion in which excess blood may be drawn into an area
hyperemia
what is hyperemia?
Too much blood; a lesion in which excess blood may be drawn into an area
Usually at the __________ of the circulation
arterial site
physiologic in hyperemia
° Post-prandial gastric
° blushing
° Stimulation of erectile tissue
Pathologic (abnormal) hyperemia factors to consider:
° duration (chronic)
° extent (general, location)
° mechanism (active, passive)
patterns of hyperemia
- Acute local active – inflammatory
- Acute local passive – obstruction
- Chronic local passive – obstruction
- Chronic general passive – Cardio-pulmonary problem (e.g. CHF)
a long term condition wherein heart can’t pump blood well enough to give your body enough blood supply; as a result, blood and fluids collect in the lungs and leak over time
Congestive Heart Failure (CHF)
Main causes of CHF
Coronary artery diseases
Two types of CHF:
left sided and right sided
left ventricle of the heart no longer pumps enough around the body, then blood builds up in the pulmonary veins or the blood vessels that carry the blood away from the lungs (which causes shortness in
breathing, coughing)
left sided
right ventricle is too weak to pump blood towards the lungs (which causes swelling and shortness of breathing)
right sided
RBCs are present outside the blood vessel; escape of blood from the vascular system
hemorrhage
Two processes of hemorrhage:
a. Hemorrhage rhexis – injured or destructed vessel
b. Hemorrhage diapedesis – rbc escaped from intact vessels
injured or destructed vessel
hemorrhage rhexis
rbc escaped from intact vessels
hemorrhage diapedesis
causes of hemorrhage
a. Trauma
b. Systemic damage
c. Hemorrhagic diathesis
Effects of hemorrhage depend on;
a. location
b. volume of blood lost
c. rate of blood lost
Resolution
Resolution and organization
tiny pinpoint, measuring 1-2 mm size foci
Petechiae/Petechial hemorrhage
larger areas of hemorrhage measuring 2 to 3 cm size
Ecchymosis/Ecchymotic hemorrhage
refers to extensive streaking with hemorrhage (like a splashed red paint on the tissue)
paint -brush
usually occur on serosal or mucosal surfaces (visible but cannot be palpated)
Petechia, Ecchymosis, Paint-brush
extensive hemorrhage within the tissue
extravasation
can be palpated; occurrence of sufficient red cells that come out in one area to form lump (sometimes fluid/blood) Example: Auricular hematoma in Shih tzu
hematocyst/hematoma
clinical term applied to an animal that has extensive petechial and ecchymotic hemorrhages on the
surface in mucousal/serosal disease; a descriptive term that does not imply specific disease
purpura
nasal bleeding
epistaxis
Massive hemorrhage in the body cavity
depending on the areas affected
Hemoperitoneum
Hemopericardium
Hemothorax
hemorrhage in the joint cavity
hemarthrosis
coughing out of blood
hemoptysis
passage of blood from the alimentary tract (or digestive tract)
entorrhagia
passage of blood through the uterus
metrorrhagia
vomition of blood
hematemesis