CV-Heme Flashcards
What is cardiac output?
Volume of blood pumped by heart in one minute
What is stroke volume?
Volume of blood pumped by heart in one beat
Formula for Cardiac Output?
HR x Stroke Volume
What is the most important vital sign that indicates how child is doing?
Heart Rate
What is Foramen Ovale?
Opening on wall between right and left atrium on septal wall
Blood from left and right atrium to mix.
Closes after birth
What is ductus arteriosus?
Connects the pulmonary artery to the aortic arch.
It closes off and turns into ligamenum arteriosus after birth
What is the most common heart anomaly?
Atrial septal defect (ASD)
Some causes of congenital heart disease?
Drug exposure: ~Lithium ~Depakote (valproic acid) ~ETOH ~Tobacco
Infection
~Rubella
Advanced maternal age (40 yrs +)
Chromosomal abnormalities ~Trisomies ~Turner ~Marfan ~DiGeorge
In Congenital Heart Disease, pressure within the heart is ___
Right side greater than left side
There is less resistance in pulmonary circulation than ____ circulation
systemic
Blood flows from area of ___ to ____ pressure
high
low
Abnormal connections change pressure result in ___ and ___
Left-to-right shunt
Right-to-left shunt
What defects cause increase in pulmonary blood flow?
ASD
VSD
PDA
What defects cause obstruction of blood flow from ventricles? (blood cannot get out of ventricles)
Coarctation of aorta
Aortic stenosis
Pulmonic Stenosis
What defect causes decreased pulmonary blood flow? (less blood going to lungs)
Tetralogy of Fallot
What defect causes mixed blood flow?
oxygenated and unoxygenated blood mixing together.
Transposition of great arteries
Hypoplastic left heart syndrome
What is the most common hematologic disorder of childhood?
anemia
What is anemia defined as?
Decreased RBC’s and/or Hgb concentration below normal.
Why does it take a while to notice anemia in children?
they adapt so well
What are causes of decreased red blood cell production?
Nutritional deficiency
Bone marrow failure
What are causes of increased red blood cell loss?
Acute blood loss
What are the causes of increased red blood cell destruction?
Intracorpuscular (Sickle cell disease)
Extracorpuscular (chemo, immunologic, infection)
How do we treat anemia?
Treat underlying cause
Supportive care
~Oxygen
~Bed rest
~IV fluids to replace volume
Nursing care management for anemia?
Prepare child and family for lab tests
Decrease O2 demands
~assess energy level
~minimize excessive demands
Prevent infection
Support family
Is iron deficiency anemia preventable?
Yes
Why are adolescents at risk for iron deficiency anemia?
Rapid growth and poor eating habits
Why are premature infants at risk for iron deficiency anemia?
Did not have chance to build iron stores during last trimester
Why are children 12-36 months at risk for iron deficiency anemia?
Dietary changes from formula or breast feeding to cows milk.
Milk is not high in iron.
Why do we give vitamin C with iron?
helps absorb iron