Pediatri Flashcards
(180 cards)
Just before delivery, strong uterine contractions leads to reduced placenta function.
- Every normal vaginal delivery leads to hypoxemia.
- The fetus has during the delivery SaO2 of 30-40%
(down to 20 %).
That´s why the heart rate is high: 110-160 bpm
Umbilical cord pH ~7.25 (7.15-7.35) is normal.
- Mild acidosis is well tolerated
- Pathological acidosis: pH < 7.00 (0,3-0,4 % of all newborn)
A newborn infant is always CYANOTIC right after birth!
May persist for 5-10 min in healthy infants.
Asphyxia (greek); without pulse
Def. Asphyxia: Impaired gas exchange in a fetus/newborn infant leading to:
- Hypoxia
- Hypercapnia
- Metabolic acidosis (lactacidosis)
- Glycogen use
• The fetus has ”buffer capacity” and is able to compensate for acidosis around 15 min, thereafter
”big trouble”.
Perinatal asphyxia - causes:
Prenatal
1. Sub-chronic
– Placental insufficiency leading to growth restriction
– Redistribution of blood to brain and heart
2. Sub-acute
– Preeclampsia
3. Acute
– Placental abruption, shoulder dystocia, compressed cord etc.
Postnatal
- Prenatal asphyxia continues (80 % !)
- Congenital infection?
- Maternal drugs?
- Congenital malformation?
How do we perceive the asphyxia?
Before/during birth:
• Less fetal activity
• Meconium-stained amniotic fluid
• Fetal tachycardia (even worse bradycardia….)
• Uniform late decelerations and/or “Silent pattern” (CTG)
After birth: • Apgar-score 0-6 at 1 or 5 minutes • No BREATHING effort within 30 sec • No CRYING within 60 sec • Initial bradycardia and floppy • ”No signs of life”
Normal CTG
Baseline of fetal heart rate:
• 110 – 150 beats/min
Variability/accelerations:
• 5 – 25 beats/min
• ≥ 2 accelerations/60 min
Variability/accelerations:
• Uniform, early decelerations
• Variable, uncomplicated decelerations
(amplitude < 60 beats)
Preterminal CTG: (Red flag!!!)
- No variability (< 2 beats/min) without accelerations regardless of decelerations / heart beat
APGAR-score (0-10, der 10 er best, ønsket)
- Appearance
- Pulse
- Grimace
- Activity
- Respiration
Observe: 1. Respiration – Breathing /crying? – Gasping/apnea? 2. Heart rate – Evaluation only if child is not breathing adequately – Listen to the heart, palpate the cord. 3. Is the muscle tone good?
If these parameters are fine: Relax!
However, if the child is not breathing/crying or if the child is very floppy it might need: A. Airway (and initial measures) B. Breathing = ventilation C. Circulation = chest compressions D. Drugs
- 6-10 % of all newborn infants need some stimulation/ ”assistance” to initiate breathing after birth.
- < 1 % need resuscitation.
Of 100 000 newborn in Sweden:
– 0,2 % (> 32 weeks) required unexpected resuscitation and 90% of these responded to mask ventilation alone.
CONCLUSION: Mask ventilation is essential
Skin color/complexion:
- 0: blue or pale
- 1: blue extremities, pink body
- 2: no cyanosis :-)
Pulse rate:
- 0: absent
- 1: <100
- 2: >100 :-)
Reflex irritability:
- 0: no response to stimulation
- 1: weak cry/grimace
- 2: cry or pull away :-)
Muscle tone:
- 0: none
- 1: some flexion
- 2: flexed arms and legs that resist extension :-)
Breathing:
- 0: absent
- 1: weak, irregular, gasping
- 2: strong, lusty cry :-)
Initial measures
A) Stimulation
• Dry the baby warm with towels.
But don’t waist time with this if the baby is very sick!
• If the baby has established good spontaneous respiration and heart rate > 100 the situation is good :-)
B) Ventilation: mask cover mouth and nose.
Indicated if:
– Heart rate < 100/min in spite of stimulation or always when the baby has a very poor respiratory effort / is gasping.
– Always if very bradycardic and pale, start immediately.
• Suction?
– Not routinely. Too vigorous suctioning can cause bradycardia and delay the onset of respiration!
• Open airways, avoid/minimize leak around face mask
• Self expanding bags or Neopuff®
• Ventilation rate 30-60/min.
• Initiate ventilation with room air (21% O2) in neonatal resuscitation (term).
Open airway
- Head in neutral position
The primary measure of adequate initial ventilation is prompt improvement in heart rate.
C. Circulatory support = Chest compression
Heart rate < 60/min in spite of adequate ventilation for at least 60 s.
Ventilation most important and must be optimized before you start chest compressions
- Two thumb technique (+)
- Two finger technique
- Combined ventilation and chest compression
Chest compression 90/min - Ventilation 30/min
Ratio 3:1 (120 events/min)
D. Drugs
• Rarely need for drugs, if needed give drugs via umbilical vein
– Adrenaline (repeat every 3-5 min):
• IV: 20 (10-30) μg/kg = 0.2 ml K-adrenaline/kg
(Term: 0,5 ml)
– Volume (suspect hypovolemia or haemorrhage):
• NaCl 10-20 ml/kg over 10 min
• Blood transfusion (same volume)
– Buffer: rarely indicated
– Naloxone: Not routinely
Summary
• Healthy newborn baby – Cries – Skin colour pink after 5-10 min – Heart rate > 100/min – Measures: Give to mom!!
• Moderate asphyxia
– Poor respiratory effort
– Heart rate > 60/min
– Measures: Stimulation, maybe ventilation.
• Severe asphyxia – Pale, no breathing – Heart rate < 60/min (down to zero) (but detected within 15-20 min before delivery) – Measures: ”Full” resuscitation!
.
Normal values Hgb [g/dl]:
Newborn: 17
3 months: 11
Over 12 y ♀: 14
Over 12 y ♂: 15
Anemia if toddlers have hgb < 10
Lav MCV, small erytrocytes,
think Iron Anemia, meassure iron and ferritin.
β-thalassemia: compensatory elevation of HbF Ineffective production of erythrocytes – Target cells • Blood transfusion
Composition of the hemoglobin chains
• Fetal: HbF Alfa-2-Gamma-2
• Adult:
- HbA: Alfa-2-Beta-2
- HbA2: Alfa-2-δ-2 (2-3%)
High leukocytes in newborns: (10-25 × 10^9/L)
• Platelets as in adults
TEC (transient erythroblastopenia of childhood) = Transient erytroblastopenia
- Sudden anemia in otherwise healthy young children (usually 6 months to 3 years).
- Autoimmune response to earlier (often viral) infection?
- Anemia-development prolonged => adaptation, mild symptoms.
- Transient stop in erythropoiesis.
- Bone marrow: Missing red precursors.
- Reticulocytes 0, Hg often 5-6.
- Normal iron, ferritin, trc, leucocytes.
- Spontaneous remission (after 1-2 months).
Hereditary spherocytosis
• Frequent hemolytic anemia in Northern Europe,
1: 5000,
- 75% autosomal dominant
- Defective cell wall => spherocytes => degradation in the spleen.
- Clinic picture variable, ranging from asymptomatic to significant anemia and jaundice.
- Hemolysis, increased reticulocyte count.
- Can get gallstones secondary to hyperbilirubinemia.
- Risk of aplastic crisis by infection with parvovirus B19.
- Treatment: Await Transfusion? Splenectomy?
Trombocytopenia in children
• Petecchiae/nose bleeding: When trc < 10
- ITP
- Leucemia
- Aplastic anemia
- Treatment with cytostatic drugs
- Sepsis / DIC
- HUS
Idiopathic thrombocytopenia (ITP)
• Bleeding disease in childhood - Trc-antibodies following infection (1-3 weeks in advance) - Debut symptoms: Petechiae, low trc - Treatment: Only if mucosal bleeding Gamma globuline, prednisolone - 20% last more than 6 months
von Willebrands disease
• Autosomal dominant, variable penetrance.
- Different types: Reduced production and / or abnormal function of vWF.
- Symptoms: Nosebleeding, gum-bleeding, menorrhagia, postoperative bleeding, …
- Mild cases: Normal INR, APTT, trc Measure vWF factor level and -activity.
Treatment:
- secure hemostasis.
- Cyklokapron® (fibrinolysis inhibitor)
- Octostim® (Releases endogenous factor VIII)
- Plasma-derived factor VIII contains also vWF
- Oral contraceptive pill
Leucemia – debut symptoms • Pallor / anemia - Fever / frequent infections (skin-) bleedings - Enlarged lymphglands - Liver / spleen enlargement - Bone / joint pain - Reduced general condition
ALL - ca. 35 children annually in Norway - age: most often 2-5 years Treatment • Chemotherapy NOPHO - Total 2.5 years of treatment - Normally no bone marrow transplantation (Only in case of high risk and lack of treatment response or at relapse).
Mononukleosis / EBV
• Age-dependent symptoms:
- Post infectious fatigue
- generalized lymphadenopathy
- hepatosplenomegaly
- Activated lymphocytes in PB
Diagnostic tools:
- Mononucleosis Rapid Test
- EBV serology
Acute tonsillopharyngitis / acute lymphadenitis
Throat inflammation in children: 70% viral
Bacterial tonsillopharyngitis:
- Gr. A streptococcus
- Some GAS strains form pyrogenic toxins -> scarlet fever
Possible, but rare complications:
- Peritonsillar / retropharyngeal abscess
- Post-streptococcal diseases
Symptoms:
- Throat pain, fever, enlarged, injected and coated tonsils and regional tender nodal sites. Rapid growth, high CRP.
Diagnostics:
- Throat bact.swab and / or streptococcal antigen test
- Evtl: Hb, leuc and CRP
- Treatment: Penicillin
Acute lymphadenitis:
- Bilateral cervical: Most often Gr. A streptococcus
- Unilateral cervical: Usually Staph. aureus
Atypical mycobacteria / chronic lymphadenitis
- Other mycobacteria than M. tuberculosis and M. leprae
- Inoculation (eg. Sandboxes or swimming pool)
In healthy children (1-5 years): Isolated lymphadenitis (± abscess) - Cool, without inflammatory signs - Discolouration - Slow development
Diagnostics: -> Clinical! Mantouxtest / QuantiFeron
Histology + direct microscopy Cultivation (4-6 weeks !!!)
Surgical excision of the bump (evtl. + AB treatment)
Atopic eczema gives recurrent infections
–> Lymphadenopathy
Several axillary and inguinally palpable lymph glands (1 x 1 cm).
Causes of lymphadenopathy in children:
- Bacterial infections: Streptococcus, staphylococcus, atypical mycobacteria, tbc,
- Viral infections: EBV, CMV
- Autoimmune diseases: SLE
- Kawasaki
- Malignancies: Leukemia, Lymphoma
- Reactive hyperplasia
Pediatrics
Defined by age: Prematurely born infants (down to 23 weeks gastation up to 18 years)
Neonate < 4 weeks
Infant < 1 year
Normal respiratory rate, decreases with age:
Newborn: 40
1 year: 30
5 years: 20
Adults: 12
Heart rate:
<1 år: 110-160 1-2 år: 100-150 2-5 år: 95-140 5-12 år: 80-120 >12 år: 60-100
Blood pressure, increases with age
Systolisk BT: <1 år: 70-90 1-2 år: 80-95 2-5 år: 80-100 5-12 år: 90-110 >12 år: 100-120
Acronym HELP
To help the doctor and the patient ensuring high quality of health care!!
- History
- Examination
- Logical deduction
- Plan for management
Examination - 1 Look (observation) first! • Severity of illness • Breathing • Growth, nutrition • Behaviour • Hygiene, care
• Do NOT ask the child for permission, instead..
– Say friendly that
“I am now going to examine you”
Examination - 2
• The order of the exam can be individualized.
• Start by observation, introduce instruments and let the child check them out, keep invasive or painful parts for the end.
• Explain everything you will be doing
– Use age-appropriate, non-threatening terms
– Give feedback
• The child has to be undressed for the examination, but this can be done gradually and in stages.
Examination - 3
• General appearance!
– Observe
– Listen to history
• “The sick looking child”?
• Kids are impatient, so a systematic full examination may be difficult. Examine the most pertinent area first.
• Best examination method by age:
– Neonates, very young infants: on examination table.
– Up through preschool: lying/sitting on mother’s/father’s lap.
– Adolescent: sometimes without family present (ask what they want).
• Warm hands and warm the stethoscope!
Examination - 4
• Record respiratory rate FIRST, before crying starts.
– In child, breathing sounds are easier to hear, but hard to localize and hard to interpret.
• Auscultation of the heart early!
• Circulation
– Skin, capillary refill time!
• ENT (Ear, Nose & Throat) exam likely to induce a cry; goes last! Often most distressing.
• Opportunism (“use the chance you get”)
– If child dozes/sleeps – auscultate the heart.
– If child kicks examiner - observe hip range of motion.
– If cries - sometimes possible to inspect the throat.
Throat
Don’t use a spatula if you don’t need it!
Examination of the throat is best left as the last item of any examination as it is seldom comfortable.
It is much easier if the child willingly opens his mouth,
but if not, be firm, gentle, quick and careful.
Severity of illness ”60 second assessment”
• Consciousness • Airway – Effort, stridor, wheeze • Breathing – Repiratory rate, cyanosis • Circulation – HR, pulse, peripheral temp, capillary refill time
Respiration - 1 Important to assess: • Respiratory rate! • Chest wall recessions • Inspiratory stridor? • Expiratory grunting or wheezing? • Ausculation – Limitations in children!
Tachypnoea: Neonate > 60 Infant > 50 Young children > 40 Older children > 30
Respiratory rate: Count before you use your stethoscope!!
Abdomen
- Inspection first
- Palpation then
- Flat hand
- Hips flexed!
• Genital examination often routine in infants
– E.g. are testicles normally descended?
– Later only if relevant
• Rectal examination
– NOT part of routine
– Only if relevant
- ‘Milk’ the testicle downwards towards the scrotum.
- Do not feel from “the bottom” to see if the testicle
is present, this will induce the cremasteric reflex and make it difficult for you to find the testicle. - Warm surroundings/bath tub.
Brief neurological screen
• Parents account of developmental milestones.
• Adapt the neurological examination to the child age.
– Use common sense to avoid unnecessary examination
– Play, write
– Walk, run and jump!
– Language, vision, hearing (ask parents)
– Social interactions
• Usually not necessary with a “formal” neurological examination incl. reflexes, only in cases where you suspect neurological disease.
Motor development - Milestones
Newborn: limbs flexed, symmetrical postures
6-8 weeks: Raises head to 45 degrees.
3 months: elbow support when laying on stomach
6-8 months: sits without support. (At 6 months with round back, at 8 months with straight back).
8-9 months: crawling
10 months: walk around furniture
12 months: walking unsteadily, broad gait, hands apart
15 months: walks alone steadily
DEVELOPMENTAL EVALUATION IN CHILDREN
- GROWTH
- Weight, length, head circumference, puberty - MOTOR
- Pattern of movements, tonus, reflexes - SENSES
- Vision, hearing - MENTAL
- Social abilities / communication and language - NATURAL FUNCTIONS
- Bladder and bowel control, menstruation
Anthropometry • Weight • Length • Head circumference • BMI
Weight Average birthweight ~ 3500 (2500-4500) g – Physiological weight loss < 10 % – Normal weight gain pr week: • 3-4 weeks: 250 g / week • 6 months: BW x 2 • 12 months: BW x 3
Length • Average length at birth ~ 50 cm • 0-1 year: 25 cm / year • 1-2 year: 12,5 cm / year • 2 years: 1⁄2 adult height
Head circumference
• Average at birth 35 cm
• 1 year 46 cm
• 16 years 56 cm
Growth charts
• Based on cross- sectional studies of healthy children
• 50 centile = median value (0 SD) = Normal for halvparten (median)!
• 2.5 perc (- 2 SD) Liten
• 97.5 perc (+ 2SD) Stor
Concern when:
• Crossing of two centile lines
• Measurements above/below 97,5p/2.5p
Ex: the first steps
25 % by 11 months
50 % by 12 months (median)
75 % by 13 months
90 % by 15 months
97.5 % by 18 months (2 SD)
24 months (”limit age”)
Goal: early detection of delayed development
DANGER SIGNS: • Primitive reflexes remains • Asymmetry • Absence of reflexes • Exaggerated reflexes • (OBS: Spasticity!!!)
Primitive reflexes
Assymetry or longer persistence suggest neurological deficit.
• Sucking reflex/ rooting reflex
– From birth
– Disappearance 2-3 months
• Palmar grasp
– From birth
– Disappearance 3-4 months
• Plantar grasp
– From birth
– Disapperance 8-12 months
MORO reflex
– From birth
– Disappearance 3-4 months
• Asymmetric tonic neck reflex:
– From 1 month,
– disappearance 6-7 months.
• Stepping reflex:
– From birth
– disappearance 1-2 months
• Babinsky reflex:
– Initially up (hard to elicit)
– down from around 1 year
• Postural reflexes
– Parachute: From 9-11 months, Persists !!
– Landau reflex: From 3-6 months, disappears around 1 year
– Lateral support reflex: From 7 months, persists
Fine motor development
Newborn: Follows face and light to the midline
6 weeks: Smiles. Follows face and object to the midline
4 months: reaches out for toys
7 months: transfer toys from one hand to the other
10 months: mature pincer grip !
16-18 months: makes marks with a crayon 2 years: make a line 3 years: make a circle 4 years: make a cross 4,5 years: make a square < 5 years: make a triangle
3-4 months: Laughs !
6 months: Follow moving objects, 180 degrees
7 months: turn to soft sounds out of sight
7-8 months: BOEL-test (Eye Orients After Sound)
Social skills:
6 weeks: smiles responsively
6-8 months: puts food in mouth
10-12 months: waves bye-bye, plays peek-a-boo
2 years: dry by day & pulls of clothing when peeing !!
Bedwetting?
• Coordination and bladder control generally occurs by
4 years of age.
• Nighttime between 5-7 years old.
• Still ~10% of 7 year old children have some difficulty staying dry.
Bowel control
• Expected bowel control by the age of 4.
• 1-2 % of school children has passage of stools in inappropriate places.
– The vast majority due to functional constipation.
When to worry • At any age: – Parental concern – Hypotonia – Regression in previously acquired skills – Persistent primitive reflexes.
When to worry • 6-8 weeks: – Not smiling – No eye-contact • 6 months. – Little interest in people, toys, noises • 10 months – No sitting – No pincer grasp – Hand preference development • 18-24 months – Not walking independently – No speech • 3 years – No sentences (2-3 words) • 4 years – No intelligible speech
Causes of developmental delay
• Motor
– Normal variant (e.g. bottom shufflers)
– Neurological disorder (e.g. CP)
– Neuromuscular disorder (e.g. Duchennes)
– Any cause of global developmental delay
• Communication (speech, language and nonverbal)
– Hearing disorder
– Visual disorder
– Lack of stimulation
– Articulation defect (e.g. physical abnormality)
– General developmental delay
– Autism
• Global
– Genetic low intelligence
– Lack of stimulation
– Chronic illness
– Genetic disorder or syndrome (Down, metabolic disorder)
– Antenatal disorder (e.g. congenital infection)
– Birth asphyxia
– Prematurity
– Hypothyroidism
– Neurological insult (e.g. trauma, meningitis)
Further investigations – Blood • thyroid function tests • chromosome analysis • metabolic screen • other – Imaging • Cranial ultrasound • CT /MRI – other • EEG • Nerve conduction studies • Muscle or nerve biopsy
-.
Global causes of death in children < 5 years of age
- 5.9 million in 2015
- ~2/3 infectious causes
Maternally IgG is tranferred from placenta
What is fever?
Rectal temperature > 38
• High fever (>40-40.5 oC) in children < 3-6 months is associated with a substantial risk of severe infection.
• Low threshold for admission!
BUT
• Children <3-6 months may be afebrile and still have a severe infection.
• Always consider the general condition as well !!
Investigations • Complete blood count (CBC) – Often high or very low WBC in severe bacterial infections • CRP , procalcitonin • Blood culture • Urinary specimen – Dip stick and culture • Lumbar puncture • Chest X-ray
Capillary refill time, press thumb on chest, should refill within 2-3 sec.