Blood Spatter Test-Forensics. UPDATED
ACTUAL Exam Questions and CORRECT
Answers
General Characteristics. - CORRECT ANSWER --On avg. accounts for 8% of total body
weight.
-4.5-5.5 liters of blood.
-Internal and or/ external blood lose(hemorrhage).
-40% blood loss produces irreversible shock(death).
-20% loss(1.5 liters) causes incapacitate(loss/impairment of consciousness and control).
Circulatory System. Arteries. - CORRECT ANSWER -Carry blood away from heart,
oxygenated, high pressure.
Circulatory System. Veins. - CORRECT ANSWER -Carry blood into heart, low
pressure,deoxygenated.
Heart Chambers. Right side of heart. - CORRECT ANSWER -Functions to receive
deoxygenetated blood and send to lungs to oxygenate.
Heart Chambers.Left side of heart. - CORRECT ANSWER -Functions to receive
oxygenated blood and send it to the rest of body.
Blood Pressure. - CORRECT ANSWER -Determined by the amount of blood your heart
pumps and the amount of resistance to blood flow in your arteries.More blood your heart
pumps=narrower arteries=higher blood pressure.
Systolic(numerator of blood pressure). - CORRECT ANSWER -Higher of two numbers
measures the pressure in the arteries when the heart beats(When the heart contracts).
, Diastolic(denominator of blood pressure). - CORRECT ANSWER -Lower of two
numbers, measures the pressure in arteries between heartbeats(When heart is resting,between
beats).
Blood Loss classification due to Trauma.1)Class 1 Hemorrhage. - CORRECT ANSWER -
Involves up to 15% of blood volume.Typically no change in vital signs and no need for IV.
Blood Loss classification due to Trauma.2)Class 2 Hemorrhage. - CORRECT ANSWER -
15-30% of total blood volume. Tachycardia(Rapid Heart Beat) the systolic and diastolic blood
pressure narrow range. Skin looks pale, cool to the touch. Slight changes in behavior(irritable,
confused). IV, Saline solution is required.
Blood Loss classification due to Trauma.3)Class 3 Hemorrhage. - CORRECT ANSWER -
Involves loss of 30-40% of circulating blood volume. Blood pressure drops the heart rate,
increases shock, mental status worsens(irritable,lethargic,diminished pain response). Blood
transfusion is usually necessary.
Blood Loss classification due to Trauma.4)Class 4 Hemorrhage. - CORRECT ANSWER -
Involves of greater than 40% of circulating blood volume. The limit of body's compensation is
reached and aggressive resuscitation is performed.
Estimating Blood Loss. - CORRECT ANSWER -Visualize how much is in a pint(5
gallons is aprox. 10 pints).
Patterns of Blood stains help reconstruct crime. - CORRECT ANSWER -1)Location.
2)Distribution.(of blood).
3)Appearance.
3 kinds of Blood Patterns(More Specific). - CORRECT ANSWER -1)Passive-Drops due
to gravity alone.
2)Transfer-Transfer of blood from one object to another.
3)Projected-Internal/external force applied to a blood source.
ACTUAL Exam Questions and CORRECT
Answers
General Characteristics. - CORRECT ANSWER --On avg. accounts for 8% of total body
weight.
-4.5-5.5 liters of blood.
-Internal and or/ external blood lose(hemorrhage).
-40% blood loss produces irreversible shock(death).
-20% loss(1.5 liters) causes incapacitate(loss/impairment of consciousness and control).
Circulatory System. Arteries. - CORRECT ANSWER -Carry blood away from heart,
oxygenated, high pressure.
Circulatory System. Veins. - CORRECT ANSWER -Carry blood into heart, low
pressure,deoxygenated.
Heart Chambers. Right side of heart. - CORRECT ANSWER -Functions to receive
deoxygenetated blood and send to lungs to oxygenate.
Heart Chambers.Left side of heart. - CORRECT ANSWER -Functions to receive
oxygenated blood and send it to the rest of body.
Blood Pressure. - CORRECT ANSWER -Determined by the amount of blood your heart
pumps and the amount of resistance to blood flow in your arteries.More blood your heart
pumps=narrower arteries=higher blood pressure.
Systolic(numerator of blood pressure). - CORRECT ANSWER -Higher of two numbers
measures the pressure in the arteries when the heart beats(When the heart contracts).
, Diastolic(denominator of blood pressure). - CORRECT ANSWER -Lower of two
numbers, measures the pressure in arteries between heartbeats(When heart is resting,between
beats).
Blood Loss classification due to Trauma.1)Class 1 Hemorrhage. - CORRECT ANSWER -
Involves up to 15% of blood volume.Typically no change in vital signs and no need for IV.
Blood Loss classification due to Trauma.2)Class 2 Hemorrhage. - CORRECT ANSWER -
15-30% of total blood volume. Tachycardia(Rapid Heart Beat) the systolic and diastolic blood
pressure narrow range. Skin looks pale, cool to the touch. Slight changes in behavior(irritable,
confused). IV, Saline solution is required.
Blood Loss classification due to Trauma.3)Class 3 Hemorrhage. - CORRECT ANSWER -
Involves loss of 30-40% of circulating blood volume. Blood pressure drops the heart rate,
increases shock, mental status worsens(irritable,lethargic,diminished pain response). Blood
transfusion is usually necessary.
Blood Loss classification due to Trauma.4)Class 4 Hemorrhage. - CORRECT ANSWER -
Involves of greater than 40% of circulating blood volume. The limit of body's compensation is
reached and aggressive resuscitation is performed.
Estimating Blood Loss. - CORRECT ANSWER -Visualize how much is in a pint(5
gallons is aprox. 10 pints).
Patterns of Blood stains help reconstruct crime. - CORRECT ANSWER -1)Location.
2)Distribution.(of blood).
3)Appearance.
3 kinds of Blood Patterns(More Specific). - CORRECT ANSWER -1)Passive-Drops due
to gravity alone.
2)Transfer-Transfer of blood from one object to another.
3)Projected-Internal/external force applied to a blood source.
