anatomy and physiology cell nucleus: 46 chromosomes or 23 pairs most somatic cells have ability to...
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Anatomy and Physiology
Cell nucleus: 46 chromosomes or 23 pairs
Most somatic cells have ability to reproduce through mitosis
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Anatomy and Physiology
Approximately 2 percent of newborns are born with congenital anomalies
Causes 20 percent genetic5 percent chromosomal10 percent environmental
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Diagnostic Tests
Ultrasound of fetus: detects malformations
Amniotic fluid: reveals genetic and chromosomal disorders
Maternal blood: reveals abnormal fetal substances
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Muscular Dystrophy
Genetic degeneration of muscles Most common type is Duchenne’s MD Onset between two and five years of
age No cure Treatment: physical therapy, orthopedic
devices, exercise
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Congenital Hip Dislocation Abnormal hip joint resulting in femoral
head slipping out of normal position Symptoms
Infant exhibits asymmetrical folds of affected thigh
Difference in leg lengthLimited abduction
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Congenital Hip Dislocation Treatment
Closed reductionMaintenance of normal position by use of a
splint or cast for 2 to 3 monthsSurgery in older children
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Osteogenesis Imperfecta
Inherited condition of abnormally brittle bones leading to fractures
No cure
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Hydrocephalus
Abnormal accumulation of cerebrospinal fluid in brain due to obstruction
SymptomsEnlargement of infant head and bulging eyesTight scalp and prominent head veinsShrill high-pitched cry and unable to lift headMental retardation
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Hydrocephalus
TreatmentSurgery to place shunt from brain to
peritoneal cavity to drain excess fluid
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Cerebral Palsy
Congenital bilateral paralysisInadequate blood or oxygen supply to brain
during fetal development
Symptoms Hyperactive reflexes and muscle contractionMuscle weakness and “scissors gait”
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Cerebral Palsy
No cure Treatment
Physical and speech therapyOrthopedic cast, braces, and surgeryAnticonvulsants and muscle relaxants
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Spina Bifida
Congenital disorderOpening in spinal column
Forms of spina bifidaSpina bifida occultaMeningoceleMyelomengiocele
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Cardiovascular
Defects may be small or quite large Early diagnosis and surgery improved
dramatically, reducing mortality rate
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Cardiovascular
Types of defectsAtrial and Ventricular Septal DefectsPatent Ductus ArteriosusCoarctation of the AortaTetralogy of Fallot
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Cardiovascular
Types of defectsRight ventricle hypertrophyVentricle septal defectAbnormal placement of aorta
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Digestive
Types of digestive malformationsMeckel’s Diverticulum: outpouching of
diverticulum of ileumEsophageal atresia: abnormal esophagusCongenital diaphragmatic herniaImperforate anus
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Developmental Malformations Cleft Lip - formerly called “harelip”
One or more splits in upper lipAffects boys more frequently girlsTreatment is surgical repair
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Developmental Malformations Cleft Palate
More serious than cleft lipInvolves roof of mouthTreatment is surgical
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Pyloric Stenosis
Narrowing of lower end of stomach Common anomaly of digestive tract Symptom: projectile vomiting Treatment: pylorotomy
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Hirschsprung’s Disease
Absence of nerves in segment of colon; usually sigmoid colon
SymptomsChronic constipationAbdominal distention
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Hirschsprung’s Disease
Treatment Surgical removal of the affected segmentTemporary colostomy may be necessary to
allow adequate healing of colon
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Phenylketonuria
Genetic disorder: faulty metabolism of the protein phenylalanine
Diagnosis PKU blood testing 72 hours after birthTesting is mandatory in United States
Lack of treatment: mental retardation
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Hypospadias
Abnormal congenital opening of male urinary meatus Opens under surface of penis
Mild cases can be left untreated Surgical repair is treatment of choice for
severe cases
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Wilm’s Tumor
Most common solid tumor affecting children and infants
Highly malignant and usually replaces one whole kidney
Treatment involves chemotherapy and surgery
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Turner’s Syndrome
Chromosomal disorder: females have only one X chromosome rather than XX
Ovaries are either abnormal or absent Treatment: reduce growth with
hormones and estrogen therapy
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Klinefelter’s Syndrome
Chromosomal disorder: affected males have extra X chromosome
SymptomsNot diagnosed until puberty due to abnormal
male sexual developmentSmall penis and testes
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Klinefelter’s Syndrome
SymptomsEnlarged breastsAbsent or scant body hairImpaired intelligence
TreatmentTestosterone therapy
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Cystic Fibrosis
Hereditary disorder: affects exocrine glands causing viscous secretions
Treatment Postural drainageChest clappingAntibiotics, bronchodilators, expectorants,
and oxygen
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Down Syndrome
Formerly called “mongolism” Symptoms
Mild to severe mental retardationFlat nasal bridge, low-set ears, slanted eyesEpicanthus Thick protruding tongue
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Down Syndrome
Abnormal extremities Organ defects No cure
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Failure to Thrive
Lack of physical growth and development in infant or child
SymptomsWeight loss or failure to gain weight,
anorexiaIrritabilityVomiting, diarrhea, weak, “rag doll” limpness
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Failure to Thrive
SymptomsUnresponsiveness to affectionWary of parents or caregiversAvoid eye contactStiffen when cuddled
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Failure to Thrive
TreatmentTeaching mothering and nurturing behaviors
to mother/parents Promotion of self-esteem
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Fetal Alcohol Syndrome
Birth defects to child due to mother consuming alcohol during pregnancy
SymptomsVarying degrees of mental retardationDecreased physical development
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Fetal Alcohol Syndrome
SymptomsIrritability in infantsHyperactivity in older childrenMicrocephalyIncreased incidence of ventricular septal
defects
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