Pediatrics Course - Development, Conditions, and Treatments

Address breastfeeding jaundice by recognizing immaturity of bilirubin conjugation, since dehydration from milk raises unconjugated bilirubin; in first week continue breastfeeding, with phototherapy at 20 and exchange therapy at 25.

Explore esophagus anatomy and physiology, including three narrowings, supply from inferior thyroid, bronchial, and gastric arteries, drainage via inferior thyroid, azygos, and portal veins, muscle types, and no serosa.

Explain how the autonomic nervous system controls multiple organ functions through sympathetic and parasympathetic branches, including fight or flight and rest and digest responses.

Acute high altitude triggers hyperventilation and respiratory alkalosis, causing altitude sickness; chronic adaptation includes increased BPG and erythropoietin-driven polycythemia, with acetazolamide affecting bicarbonate handling.

This lecture clarifies how precision and accuracy differ in pediatrics testing, showing reliability (repeatable results) versus validity (true values) through blood pressure and calcium tests.

Diagnose ADHD by core symptoms—distractibility, disorganization, forgetfulness, and hyperactivity—for at least six months in two settings, then treat with stimulants (amphetamines, methylphenidate) or atomoxetine, an alpha two blocker not addictive.

Examine the most common cognitive behavioral therapy and targeted approaches, including interpersonal, motivational, supportive, psychodynamic, dialectical therapies, biofeedback, and family therapy for depression, addiction, and pain.

Body dysmorphic disorder is an obsessive-compulsive condition with appearance preoccupation and mirror checking, often with eating disorders, best treated with cognitive behavioral therapy and SSRIs such as Talopram or Fluoxetine.

Examine how ADHD begins before age 12 with persistent symptoms and stimulant treatment to sharpen attention, then overview autism, Rett syndrome, Tourette, separation anxiety, oppositional defiant, and conduct disorder.

Use electroconvulsive therapy as a last-resort treatment for refractory depression with psychosis, suicidality, or catatonia, induced under anesthesia to produce a seizure with brief confusion and mild amnesia.

Compare OCD with OCPD, outlining egodystonic distress in OCD versus egosyntonic traits in OCPD and patient acknowledgment of symptoms.

Summarizes three somatic symptom disorders: somatic symptom disorder, illness anxiety disorder, and conversion disorder, highlighting unexplained pain, illness fear, and neurological symptoms that don't fit known diseases.

Discover Tourette syndrome, an early-onset condition with motor and vocal tics, coprolalia, and common OCD/ADHD; learn diagnostic criteria and a three-step treatment using behavioral therapy, dopamine blockers, and alpha-2 blockers.

Identify how mutations in any of the four alpha globin genes disrupt hemoglobin, causing alpha thalassemia minima, minor, hemoglobin H, and hemoglobin Bart with associated anemia and hydrops fetalis.

Differentiate type I and type II Chiari malformations by posterior fossa displacement. Note syringomyelia with type I and meningomyelocele with type II, and clinical implications like hydrocephalus, apnea, and dysphagia.

Arises from absence of dystrophin, Duchenne muscular dystrophy causes progressive calf weakness and muscle fiber death with fibrofatty replacement in boys via frameshift mutations, while Becker presents with some dystrophin.

Begin with x-ray for ingestion and serial imaging to confirm movement of coins. Endoscopy removes magnets, batteries, or sharp objects in stomach or esophagus; perforation requires airway security and surgery.

Explore how cystic fibrosis patients face age-related infections, with MRSA under 20 and Pseudomonas over 20, and learn treatments like vancomycin, antipseudomonal penicillins, fluoroquinolones, and linezolid for both.

Explain autosomal recessive Cftr mutation on chromosome 7 and its defective ATP-gated chloride channel, causing thick lung mucus, pancreatic duct obstruction, meconium ileus, and positive sweat chloride tests.

Klumpke palsy involves lower trunk brachial plexus injury from upward arm force, causing clawing of the hand; Erb palsy involves upper trunk injury causing a waiter's tip arm.

Explore common foodborne pathogens—Campylobacter, E. coli, Listeria, Norovirus, Salmonella, and Staphylococcus aureus—and prevention through proper hand washing, washing produce, safe meat handling, cooking, and red flags for medical care.

Examine how Guillain-Barré syndrome arises from autoimmunity against Schwann cells, causing segmental demyelination and ascending motor paralysis that can involve respiratory failure, with Campylobacter jejuni links and albuminocytologic dissociation.

Avoid antibiotics and platelets in E. coli O157:H7 infection to prevent hemolytic uremic syndrome; HUS causes non-immune RBC destruction, anemia, thrombocytopenia, and renal failure, treated with plasmapheresis and supportive care.

Compare hus and ttp: both show decreased platelets and red blood cells with similar labs; hus causes uremia, while ttp has neurological symptoms and adamts13 deficiency, treated with plasmapheresis.

Describe autoantibody-mediated platelet destruction by glycoproteins IIb/IIIa, causing thrombocytopenia with enlarged megakaryocytes producing defective platelets; triggers include hepatitis C, HIV, cancers, and medications; no splenomegaly; treat with steroids or splenectomy.

Identify common meningitis pathogens like streptococcus pneumoniae and group B streptococci, initial treatment with vancomycin plus a cephalosporin, and culture-guided adjustments.

Identify the continuous murmur peaking at the second heart sound, best heard at the second left intercostal space, and note risk factors, transthoracic echo as initial test, and indomethacin treatment.

Identify phenylketonuria as autosomal recessive disorder from defective phenylalanine hydroxylase. It causes phenylalanine buildup, tyrosine deficiency, neural damage, and a musty body odor; screen newborns and restrict phenylalanine; supplement tyrosine.

The radial nerve originates from C5–T1, travels through axilla and along the humerus, innervates the triceps and forearm extensors, and injury from shoulder dislocation or humerus fracture causes drop wrist.

Explore how common refractive errors cause impaired vision and how glasses correct them, with hyperopia resolved by convex lenses, myopia by concave lenses, and astigmatism needing very thick cylindrical lenses.

Rheumatic fever is an autoimmune reaction to group A streptococci that crossreacts with renal tissue. Diagnose with Jones criteria and treat with penicillin five years or ten years cardiac involvement.

Identify scarlet fever as a group a streptococcal infection with sandpaper body rash and strawberry tongue, diagnosed by rapid strep test and treated with penicillin to prevent rheumatic fever.

Learn universal seizure first aid: stay calm, ensure safety, protect the airway, place the person on their side, avoid giving anything until fully awake, and stay with them.

Explore how adamts13 deficiency triggers platelet activation and red blood cell destruction during stress, with schistocytes and neurological symptoms guiding diagnosis; plasmapheresis is the key treatment.

Classify asthma into intermittent, mild, moderate, and severe, and use escalating treatment from salbutamol to inhaled corticosteroids, long-acting beta agonists, and escalation of exacerbation care guided by carbon dioxide levels.

Turner syndrome results from loss of one sex chromosome, leaving 46 chromosomes with a single X, causing webbed neck, cystic hygroma, lymphedema, bicuspid aortic valve, coarctation, and streak ovaries.

Ventricular septal defects cause a holosystolic, hollow murmur at the left lower sternal border; large defects cause feeding problems and pulmonary complications, diagnosed by echo and catheterization, repaired surgically.

Explore common vertigo etiologies, including hydrops endolymph with hearing loss, vestibular schwannoma exclusion by MRI, benign paroxysmal positional vertigo, endolymph fistula, labyrinthitis, vestibular neuritis, and multiple sclerosis–related vertigo.

Identify volvulus as twisting causing obstruction and ischemia with the coffee bean sign and urgent surgical correction; intussusception involves telescoping at the ileocecal junction, sometimes reduced by air enema.

Assess newborn health with the Apgar score, a ten-point scale measured at one and five minutes using appearance, pulse, grimace, activity, and respiration to identify potential pathology.

Offer a stepwise management of nocturnal enuresis in children over five, from ruling out infections with urine analysis to sleep hygiene, an enuresis alarm, and desmopressin.

Identify common newborn facial red lesions, including nevus simplex and port wine stain; recognize hemangioma regression with beta blockers and other pigmented lesions like congenital melanocytic nevus and congenital melanocytosis.

Trace how cholesterol becomes pregnenolone and branches into aldosterone, cortisol, or sex hormones, highlighting enzymes like cholesterol desmolase, 21-hydroxylase, 11 beta hydroxylase, 17 hydroxylase, and aromatase.

Explore congenital adrenal hyperplasia enzyme deficiencies, including 21-hydroxylase, 11 beta hydroxylase, and 17 alpha hydroxylase pathways, and their effects on aldosterone, cortisol, salt wasting, and sex hormones.

Edwards syndrome, trisomy 18, presents with hypotonia and overlapping fingers, rocker-bottom feet, renal abnormalities, horseshoe kidney, and heart disease; quad test shows decreased AFP, hCG, estriol, and inhibin A.

Patau syndrome, caused by trisomy 13, presents with cleft lip/palate, renal anomalies, aplasia cutis, mental retardation, and polydactyly; quad screen shows decreased hCG, with high mortality in the first year.

Down syndrome increases risk of congenital heart defects, gastroesophageal reflux and celiac disease, immune issues, sleep apnea, obesity, atlantoaxial instability, leukemia, and early dementia, with routine care improving life expectancy.

Prenatal screening uses maternal quad test and ultrasound to estimate Down syndrome risk, then invasive chorionic villus sampling or amniocentesis for definitive diagnosis with high accuracy and miscarriage risk.

Discover how Down syndrome, caused by nondisjunction and trisomy 21, presents with hypotonia, a single palmar crease, epicanthic folds, and low nasal bridge, and is screened by quad test.

Identify early autism signs from birth to age two, including lack of eye contact, absent response to name, reduced facial expressions, impaired joint attention, and limited turn-taking play.

Autism common presentations include social communication deficits and repetitive behaviors in young children, with screening at 1.5 and 2 years and signs like not responding to name, poor eye contact.

Explore autism risk factors: hereditary and genetic influences, older parental age, heavy metals exposure, metabolic imbalances after birth, Fragile X syndrome, and fetal exposure to thalidomide or valproic acid.

Prioritizes autism treatment through behavioral and communication therapy to reduce social deficits and teach new skills, supported by educational and family therapy, with antipsychotics and antidepressants used cautiously when needed.

Identify the five autism spectrum disorder specifiers from DSM-5, including intellectual and language impairment, genetic or environmental factors, neurodevelopmental comorbidity, and catatonia, with screening at 18 and 24 months.

Acute lymphoblastic leukemia primarily affects children aged 2–5, with b-cell and t-cell types, thymus enlargement and cd10, cd19, cd20 markers linked to chromosome 12–21 translocation.

Cancer terminology includes adjuvant therapy, neoadjuvant therapy, salvage therapy, and induction, consolidation, and maintenance therapies, showing how these phases progressively kill remaining cancer cells.

Explain how tumor grading reflects cellular differentiation and prognosis, and how tumor staging assesses disease development with T, N, and M, including C, P, or B modifiers.

Explain how tumor lysis during chemotherapy releases potassium, phosphate, calcium, and nucleic acids, causing hyperkalemia, hyperuricemia, and acute renal injury; protect kidneys with aggressive hydration, rasburicase, and allopurinol before chemotherapy.

Dengue fever, caused by the dengue virus and transmitted by the Aedes mosquito, shares symptoms with chikungunya; prevention relies on vaccines and environmental control to reduce breeding.

Explore how dengue virus, a flavivirus, spreads via Aedes, its co-infection with chikungunya, and how the live recombinant dengue vaccine uses yellow fever shell to induce immunity and guide prevention.

Dengue symptoms appear 4–6 days after a mosquito bite and last about ten days, with high fever, rash, headache, and fatigue; treat with paracetamol and fluids, avoid aspirin.