NEONATAL RESUSCITATION PROTOCOL The following protocol is that which is suggested by the American Heart Association/American Academy of Pediatrics. BIRTH 0sec Clear of meconium? Breathing or crying? Good muscle tone? Colour pink? Term gestation? YES Routine care: Provide warmth Clear airway Dry NO Provide warmth Position, clear airway Dry, stimulate, reposition Give O2 as necessary 30sec Breathing, pink HR> 100 Evaluate respirations, heart rate and colour Supportive care Apnoea or HR < 100 Ventilating, pink HR> 100 Provide positive pressure ventilation HR<60 60sec HR>60 Positive pressure ventilation and chest compressions 90sec HR<60 HR>60 Administer adrenaline Supportive care A summary of this protocol with applicable timelines is: The initial steps include assessment of the overall condition of the neonate and minimizing heat loss Within the first 20sec after birth, the neonate must be dried, placed under a warmer and suctioned(mouth and nose) Within the first 30sec after birth, respiration is assessed and any problem treated Within the first minute of birth, the neonatal heart rate is assessed Let us have a short look at these points in turn. The emphasis on minimizing heat loss is because cold stress in the neonate results in hypoxemia, hypercarbia and metabolic acidosis, all of which hinder resuscitation by promoting the persistence of the fetal circulation. This is compounded in the depressed, asphyxiated neonate due to their unstable thermoregulatory systems. On respiratory assessment, the response to a gasping or apneic neonate should be positive pressure mask ventilation (PPMV)at 40-60 breaths per minute with 100% oxygen. Most neonates will respond to these first 2 steps. Be aware that it is often necessary to decompress the stomach after PPMV by inserting an oro/nasogastric tube. Failure to do this may result in splinting of the diaphragm, hypoventilation and hypoxemia. Indications for endotracheal intubation are ineffective bag-mask ventilation, anticipating the need for prolonged mechanical ventilation and as a route for administering emergency medications! It is interesting to note that the LMA has been successfully used in a number of clinical trials involving neonatal resuscitation. Time for insertion was generally less than 10sec, audible leaks occurred at ± 22cmH2O. Positive pressure ventilation was easily managed without gastric distension. This might be a good accessory airway to keep in reserve, especially for a difficult neonatal airway, eg Pierre-Robin syndrome. It is important to note that it is no longer recommended that the presence of meconium requires routine intubation and suction. Tracheal suctioning is now only recommended if there is meconium AND the baby is not vigorous. Chest compressions are only done AFTER at least 30sec of PPMV and the heart rate remains below 60. Chest compressions are done at a rate of 90 per min and should be stopped when the heart rate is above 60. The compression-ventilation ratio should be 3:1 (ie 90:30 per min), applied to the lower ⅓ of the sternum and producing a compression depth of about a ⅓ of the AP diameter. NB! The resuscitation should not be stopped to do an Apgar evaluation. Medications must be considered if the heart rate remains below 60 after 30sec of effective compressions with adequate ventilation with 100% O 2. MEDICATIONS OXYGEN must be regarded as a drug, with its own side-effects. In the scenario of resuscitation of the newborn, it is acceptable to use 100% O 2 for a short period, but this must not be continued as a maintenance drug. Even short exposures to 100% O 2 may result in the formation of highly toxic free radicals, resulting in pulmonary and retinal damage. NALOXONE is indicated specifically for respiratory depression due to maternal opioids, but not in the case of a narcotic-addicted mother. ATROPINE is generally not indicated in neonatal resuscitation, because bradycardia in the newborn is almost always related to hypoxia and not vagal stimulation. SODIUM BICARBONATE should only be given if the neonate is being adequately ventilated AND documented or presumed metabolic acidosis does not respond to other measures, otherwise respiratory acidosis will replace metabolic acidosis. VOLUME EXPANDERS are rarely indicated in neonatal resuscitation. They are specifically used where there is acute blood loss with signs of shock. They may be detrimental in other scenarios. DEXTROSE should be remembered as a drug if the neonate is lethargic at birth without an obvious cause. Approximately 10% of healthy term neonates may experience transient hypoglycaemia, more especially in the diabetic mother, the mother who received dextrose infusions in labour, macrosomic babies and neonates who are pre- or post-term. Medications can be given via peripheral veins, umbilical veins or via the ET tube. ENDOTRACHEAL MEDICATIONS The following drugs may be given endotracheally and can easily be remembered with the acronym LANE: Lignocaine Atropine Naloxone Epinephrine(Adrenaline) NB! Effects of endotracheal adrenaline are delayed by about a minute as compared to intravenous administration. Unlike the recommendations in pediatric resuscitation, where up to 3x the intravenous dose is administered endotracheally, in the neonate THE SAME DOSE IS GIVEN INTRAVENOUSLY OR ENDOTRACHEALLY (0.01mg/kg). This is to prevent the devastating complication of an intracranial haemorrhage associated with adrenaline-induced hypertension. MEDICATION Adrenaline Naloxone Sodium bicarbonate Dopamine Volume expanders CONCENTRATION 1:10 000 (1 ampoule diluted to 10ml) 0.4mg/ml 4.2% solution (0.5mEq/ml) 200mg in 200ml N/S =1mg/ml =1000µg/ml O-negative blood or normal saline DOSAGE/ROUTE 0.1-0.3ml of the diluted solution per kg, IV or via ET tube 0.1mg/kg IV or via ET tube 2mEq/kg (4ml/kg) IV and ensure effective ventilation 2-20µg/kg/min IV 10ml/kg IV RATE Give rapidly and flush with saline Give rapidly Give slowly, at least over 2min Give as a titrated infusion
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