Newborn Screening Act of 2004 (RA 9288) Flashcards
It is a non-diagnostic test because a series of follow-up procedures should be made to verify abnormal results.
Newborn Screening Procedure
What samples are collected during newborn screening
Urine an blood
What are the laboratory tests performed during newborn screening
Ferric chloride
Sodium nitroprusside clinitest
Guthrie test
It is a non-painful procedure in which a baby is screened for any incidence of hearing loss not later than 1 month of age
Hearing Screening
It is usually done using oximetery on the baby’s hands and feet
Screening for critical congenital heart defects
What is the standard absorbance of spectrophotometer
2 wavelengths 605nm and 850nm
The foreskin is surgically removed revealing the tip of the penis
Circumcision
A monitor is placed on the newborn’s forehead for a few seconds; What test is this and what is this for
Guthrie test; Comprehensive screening test for Jaundice
It is a yellowish discoloration of skin mucous membrane and sclera
Jaundice
It is a semi quantitative bacterial inhibition assay; can also be applied in other disorders such as aminoacidopathies
Guthrie Test
What is the rationale of Newborn Screening
It enables early detection and management of certain metabolic disorders
It is associated with abnormal heme synthesis, hemoglobin variants, and globin synthesis
Hemoglobinopathies
QUALITATIVE defects in hemoglobin molecules that may result in group of disorders called hemoglobinopathies. It is associated with abnormal heme synthesis, hemoglobin variants, and globin synthesis.
Hemoglobinopathy
Characterized by a defect in one or more enzymes involved in heme synthesis resulting to accumulation of porphyrin in the bone marrow or the liver
Porphyrias
They are chemical intermediates (end products) in the synthesis of hemoglobin, myoglobin, and other respiratory pigments
Porphyrin
Characterized by presence of Hemoglobin S in a homozygous state
Sickle Cell Disease
Characterized by presence of Hemoglobin S in a homozygous state
Sickle Cell Trait
o It is a clinical condition in which erythrocytes become rigid and trapped in capillaries
Sickle Cell Anemia
In hemoglobin S what amino acid are substituted and in what position
Glutamic acid with valine on the 6th position of the beta chain
What disease are sickle ell anemia patients immune to
Malaria (Plasmodium falciparum)
In hemoglobin C what amino acid are substituted and in what position
lysine for glutamic acid on the 6th position of the beta chain
What is the most common mixed hemoglobinopathy
Hemoglobin SC Disease
It is a double heterozygous condition in which an abnormal S gene from one parent is inherited and an abnormal C gene from another parent is also inherited.
Hemoglobin SC Disease
In hemoglobin D disease, what amino acid is substituted and in what position
Glycine for glutamic acid in the 121st position of the beta chain
In hemoglobin E disease what amino acid is substituted and in what position
lysin at the 26th position of the beta chain
It is characterized by having __ amino acids added to the alpha chain caused by a replacement of terminator codon with a codon for ______
Hemoglobin Constant Spring; 31; Glutamine
What disease resembles hemoglobin constant spring
Alpha thalassemia
It is a QUANTITATIVE defect in the production of normal hemoglobin molecules
Thalassemia
Associated with gene deletion. Inheritance follows the Mendelian principle. α and βthalassemia are the most common.
Thalassemia
What are the hemoglobinopathies?
Porphyrias Sickle Cell Disease Hemoglobin C Disease Hemoglobin SC Disease Hemoglobin D Disease Hemoglobin Constant Spring
What are the endocrinopathies?
Congenital Hypothyroidism
Classic Adrenal Hyperplasia
It is characterized by the absence or poor functioning of the thyroid gland, resulting to reduced production of thyroxine (increased TSH)
Congenital Hypothyroidism
Thyroid hormone which increases thyroid stimulating hormone
Thyroxine
It aids in the development of CNS and brain, and regulation of metabolism
Thyroid Hormone
It is a condition that is caused by congenital hypothyroidism; can cause growth retardation, mental retardation, developmental delay, and other abnormal features
Cretinism
Clinical disorder characterized by a deficiency of the enzyme steroid 21-hydroxylase
Classic Adrenal Hyperplasia
It is responsible in production of adrenal hormones such as cortisol and aldosterone
21-hydroxylase
- Results to genital ambiguity in females and adrenal insufficiency and that presents with dehydration, hypoglycemia and hyperandrogenia.
Classic Adrenal Hyperplasia
Decrease of cortisol (regulation of carbohydrates)
Hypoglycemia
The accumulation in the levels of androgens
Hyperglycemia
It is the most common acidopathies
Phenylketonuria
Autosomal recessive disorder characterized by deficiency in phenylalanine hydroxylase that may result to severe mental retardation
Phenylketonuria
It is conditions characterized by deficiencies in a certain enzyme that can lead to defect of metabolism of amino acid
Aminoacidopathies
It is an enzyme responsible for conversion of phenylalanine to tyrosine. If not converted may lead to brain damage
Phenylalanine hydroxylase