Pediatric Nursing Part 1 Flashcards
Preterm
birth btwn 20 - 37 weeks
- responsible for almost 2/3 of infant deaths
- ->5x the risk of SIDS
LBW
< 2500g (2.5kg); diminished prognosis
VLBW
<1500G (1.5kg); poor prognosis
SGA
< 10%ile
responsible for 20-30% of preterm births
PROM
Vertex-heel length of preterm
17-19 inches
Classic Preterm Position
Frog-like
Moro, Tonic neck, Babinski reflexes
present and normal
Next to establishing respirations, most critical element to NB survival
heat regulation
Caloric needs of a NB
120-150 cal/kg/day
Intraventricular Hemorrhage (IVH) Incidence
(Most common in preterm);
increased risk w/ low birth rate
(VLBW=50%)
s/s of IVH
Intraventricular Hemorrhage A. high pitched cry B. signs of increasing intracranial pressure C. irritability and convulsions D. focal cerebral signs E. pressure on vital centers F. anemia G. other unexplained findings
Preterm ABG’s pH
7.3 – 7.4
Preterm ABG’s PCO2
35-45
Preterm ABG’s PO2
50-80
Preterm ABG’s HCO3
19-22
Respiratory Distress Syndrome (RDS) onset
Onset around 2 hours after birth; worsens 48-72 hrs.
Closure of foramen oval occurs
1-2hrs after birth
Permanent closure occurs w/in several months
Effect of O2 on ductus arteriosus
O2–>constriction of ductus arteriosus
Functional closure-Ductus Arteriosus
15h after birth
Fibrosis- 3wks
–>reversal of bld flow through descending aorta
NB BP is lowest
3 hrs after birth
NB BP plateus
BP increases and plateaus 4-6d post birth
BP Full Term NB
60-80/40-50
NB Blood Volume
80-85 ml/Kg
WBC NB
10,000-30,000/ mm3
can carry 20-30% more O2 than maternal blood
Fetal Hmg
Phenomena in which fetal hct levels decrease progressively w/in 1st week
Physiological Anemia Of Infancy
Connects the Umbilical Vein & IVC
Ductus Venosus
Shunts blood into the IVC to prevent blood overload of the fetal liver
Ductus Venosus
Closure forces perfusion of the liver
Ductus Venosus
Opening between the Right and Left Atria in the fetal heart
Foramen Ovale
Shunts blood from the RA to LA, bypassing the fetal lungs
Foramen Ovale
-only a small amt of blood reaches lungs –>nutrition only
Opening between fetal pulmonary artery and aorta
Ductus Arteriosus
causes closure of Ductus Arteriosus
d/t increased systemic press & plum bld flow
Closure of Ductus Venosus –>
liver perfusion
2 Failure of Transitions
PPHN
PDA
PPHN aka
Persistant Pulmonary HTN
Persistance of Fetal Circulation
PDA
Patent Ductus Arteriosus
Ductus Arteriosus doesn’t close
PDA seen more often in
Preterms
S/S PDA
Initially Asymptomatic
Pulmonary Congestion
Respiratory Distress
Decreased Growth
Dx PDA
Murmur
Cardiac Cath- Increased Pulmonary Artery Oxygenation
Tx PDA in Preterm w/ RDS
Tx RDS
RDS resolves –>DA closes
Tx PDA
Indomethicin (IV)
VATS
Indomethicin
Prostaglandin inhibitor
–> DA closure 50-70% of the T
SE of indomethicin
Bleeding
GI
Decreases bone marrow production
VATS
visual assisted thoracoptic sx
–>ligate PDA w/ scope
Known causes of Congenital Heart Defects (CHD)
Infection (1st Trimester) (Mom) Alc Abuse/ Poor Nutrition (Mom) AMA (40+ yo) IDM (Infants of Diabetic Mom) Incidence increases with other defects
CHD Infant Hx (NB)
Poor feeding Tachycardia Decreased Pulses Increased Respiratory Rate Respiratory Distress s/s Cyanosis Decreased Growth Pattern
Cry & Cyanosis Worsens
cardiac
Cry & Cyanosis Improves
Respiratory
NB HR>160 when sleeping–>
Call MD
Measure pressures and oxygenation sats in chambers and vessels
Cardiac Cath
–> Structural defects
Picture inside heart, holes & narrowing
Echo
EKG Aortic Stenosis
Left Ventricular Hypertrophy
Cath- Aortic Stenosis
delayed emptying
increased L ventricle pressure
Tx Aortic Stenosis
Valve Replacement
Coarctation of Aorta
Narrowing of segment of aorta
May be pre/ post ductal
Relative to Ductus Arteriosus
S/S of Pre-ductal Coarctation of Aorta
Bounding Pulses, HA, Nose bleeds