Difference between revisions of "Neonatal hypoglycemia"

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''This page is for <u>neonatal</u> hypoglycemia. See [[hypoglycemia]] for adult patients or [[non-neonatal hypoglycemia (peds)]].''
 
==Background==
 
==Background==
 
*3 births per 1000 with hypoglycemia
 
*3 births per 1000 with hypoglycemia
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==Clinical Features==
 
==Clinical Features==
 
*Jitteriness and irritability
 
*Jitteriness and irritability
*Apnea and cyanosis
+
*[[shortness of breath (peds)|Apnea and cyanosis]]
 
*Hypotonia
 
*Hypotonia
*Convulsions
+
*[[Seizure (peds)|Convulsions]]
  
==Differential DIagnosis==
+
==Differential Diagnosis==
 +
===Neonatal hypoglycemia===
 
*Decreased substrate availability
 
*Decreased substrate availability
 
**Intra-uterine growth retardation
 
**Intra-uterine growth retardation
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**Prolonged fasting without IV glucose
 
**Prolonged fasting without IV glucose
 
*Hyperinsulinemia:
 
*Hyperinsulinemia:
**Infant of diabetic mother
+
**Infant of [[DM|diabetic mother]]
 
**Islet cell hyperplasia
 
**Islet cell hyperplasia
 
**Erythroblastosis fetalis
 
**Erythroblastosis fetalis
**Exchange transfusion
+
**[[Exchange transfusion]]
 
**Beckwith-Wiedemann Syndrome
 
**Beckwith-Wiedemann Syndrome
**Maternal -mimetic tocolytic agents
+
**Maternal beta-mimetic [[tocolysis|tocolytic agents]]
 
**?High? umbilical arterial catheter
 
**?High? umbilical arterial catheter
**Abrupt cessation of IV glucose
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**Abrupt cessation of IV [[dextrose|glucose]]
 
*Other endocrine abnormalities:
 
*Other endocrine abnormalities:
 
**Pan-hypopituitarism
 
**Pan-hypopituitarism
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**[[Adrenal insufficiency]]
 
**[[Adrenal insufficiency]]
 
*Increased glucose utilization:
 
*Increased glucose utilization:
**Cold stress
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**Cold stress/[[hypothermia]]
**Increased work of breathing
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**Increased [[shortness of breath (peds)|work of breathing]]
 
**[[Sepsis]]
 
**[[Sepsis]]
 
**Perinatal asphyxia
 
**Perinatal asphyxia
 
*Miscellaneous conditions:
 
*Miscellaneous conditions:
**Polycythemia
+
**[[Polycythemia]]
 
**[[Congenital heart disease]]
 
**[[Congenital heart disease]]
 
**CNS abnormalities
 
**CNS abnormalities
 
   
 
   
===Persistent===
+
===Persistent neonatal hypoglycemia===
 
*Too much insulin:
 
*Too much insulin:
**idiopathic, asphyxia, rhesus diagnoses, Beckwith-Weiderman, Nesiodoblastosis (autosomal recessive hyperinsulinism)
+
**Idiopathic, asphyxia, rhesus diagnoses, Beckwith-Weiderman, Nesiodoblastosis (autosomal recessive hyperinsulinism)
 
*Not enough anti-insulin:
 
*Not enough anti-insulin:
**hypopituitarism, adrenal hyperplasia
+
**Hypopituitarism, [[CAH|adrenal hyperplasia]]
 
*[[Inborn errors of metabolism]]
 
*[[Inborn errors of metabolism]]
**glycogen storage disease, fatty oxidation errors
+
**Glycogen storage disease, fatty oxidation errors
  
 
==Evaluation==
 
==Evaluation==
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''There is a normal fall in glucose @ 2-4hr of life''
 
''There is a normal fall in glucose @ 2-4hr of life''
 +
 +
*If no obvious precipitant, consider workup for [[inborn errors of metabolism]]
  
 
==Management==
 
==Management==
 
{{Pediatric hypoglycemia chart}}
 
{{Pediatric hypoglycemia chart}}
  
 +
===General Treatment===
 
*Glucometer reading 20-40mg/dL, infant is term and is able to feed:
 
*Glucometer reading 20-40mg/dL, infant is term and is able to feed:
 
**Draw blood for stat blood glucose.
 
**Draw blood for stat blood glucose.
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**If infant requires IV dextrose concentrations >12.5%, insert central venous catheter.
 
**If infant requires IV dextrose concentrations >12.5%, insert central venous catheter.
 
**Do not use D25W or D50W IV or large IV volume boluses as this creates rebound hypoglycemia in infants who are hyperinsulinemic. In addition, administration of D25W or D50W can cause dangerous increase in plasma osmolarity.
 
**Do not use D25W or D50W IV or large IV volume boluses as this creates rebound hypoglycemia in infants who are hyperinsulinemic. In addition, administration of D25W or D50W can cause dangerous increase in plasma osmolarity.
*If hypoglycemia is not controlled with above measures: Obtain Endocrine Consult to guide further diagnostic evaluation and management. While awaiting consult, send blood (while blood sugar is low) for glucose, plasma cortisol, growth hormone and insulin concentrations. Further management may include glucocorticoids, diazoxide, somatostatin or pancreatectomy.
+
*If hypoglycemia is not controlled with above measures:  
*Weaning IV dextrose infusion: When blood glucose has been stable for 12-24 h, begin decreasing IV infusion by 1-2 mL/hr q3-4 hours if blood glucose remains �60mg/dL.
+
**Obtain Endocrine Consult to guide further diagnostic evaluation and management.  
 +
**While awaiting consult, send blood (while blood sugar is low) for glucose, plasma cortisol, growth hormone and insulin concentrations
 +
**Further management may include [[glucocorticoids]], [[diazoxide]], somatostatin or pancreatectomy.
  
 
===Calculate rate of glucose administration===
 
===Calculate rate of glucose administration===
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===Persistent Hypoglycemia===
 
===Persistent Hypoglycemia===
*Check insulin, GH, cortisol
+
*Check insulin, c-peptide, GH, cortisol, beta hydroxybutyrate, UA
 
*Increase volume by 30cc/kg/d
 
*Increase volume by 30cc/kg/d
 
*Increase glucose to 12.5%
 
*Increase glucose to 12.5%
*Glucagon infusion
 
  
If continues for >7 d: send insulin, cortisol, growth hormone
+
If continues for >3 d: consult endocrinology, or sooner
  
 
==Disposition==
 
==Disposition==
 
+
*Admit
 +
**Weaning IV dextrose infusion: When blood glucose has been stable for 12-24 h, begin decreasing IV infusion by 1-2 mL/hr q3-4 hours if blood glucose remains >60mg/dL.
  
 
==See Also==
 
==See Also==
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[[Category:Pediatrics]]
 
[[Category:Pediatrics]]
 
[[Category:Endocrinology]]
 
[[Category:Endocrinology]]
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[[Category:FEN]]

Latest revision as of 18:37, 6 October 2019

This page is for neonatal hypoglycemia. See hypoglycemia for adult patients or non-neonatal hypoglycemia (peds).

Background

  • 3 births per 1000 with hypoglycemia

Risks

  • Maternal DM (hyperinsulin)
  • Premies (cannot store glycogen)
  • Sick kids (depleted glycogen)
  • Growth restricted babies (depleted glycogen)
  • Macrosomic kids

Clinical Features

Differential Diagnosis

Neonatal hypoglycemia

Persistent neonatal hypoglycemia

  • Too much insulin:
    • Idiopathic, asphyxia, rhesus diagnoses, Beckwith-Weiderman, Nesiodoblastosis (autosomal recessive hyperinsulinism)
  • Not enough anti-insulin:
  • Inborn errors of metabolism
    • Glycogen storage disease, fatty oxidation errors

Evaluation

  • Blood glucose level
    • blood glucose <40mg/dL (preterm infants repeated levels below <50)

There is a normal fall in glucose @ 2-4hr of life

Management

Pediatric Hypoglycemia Dextrose Chart

Category Age Glucose Treatment Initial IV Bolus Maintenance Dose
Neonatal <2mo <40 D10W 2.5-5 mL/kg 6 mL/kg/h
Pediatric 2mo-8yrs <60 D25W 2 mL/kg

D10W:

  • 6 mL/kg/h for first 10 kg
  • + 3 mL/kg/h for 11–20 kg
  • + 1.5 mL/kg/h for each additional kg >20 kg
Adult >8yrs <70 D50W 50mL (1 amp) OR 1 mL/kg
  • Consider diluting the D25 or D50 bolus, with NS 1-to-1, as those concentrations may be sclerosing to veins
  • Recheck 5 minutes after dose and repeat dose if low.
  • Consider glucagon IM/SQ if IV access is not readily available

General Treatment

  • Glucometer reading 20-40mg/dL, infant is term and is able to feed:
    • Draw blood for stat blood glucose.
    • Feed 5 mL/kg of D5W.
    • Repeat blood glucose or Glucometer 20 min after feeding.
  • Glucometer reading:
    • <20mg/dL or
    • <40mg/dL and NPO or preterm or
    • <40mg/dL after feeding or
    • <40mg/dL and symptomatic
      • Draw blood for stat glucose measurement.
      • Give IV bolus of 2-3 mL/kg of D10W.
      • Begin continuous infusion of D10W at 4-6mg/kg/min.
      • If infant of diabetic mother, begin D10W at 8-10mg/kg/min (100-125 cc/kg/d).
      • Repeat blood glucose in 20 min and pursue treatment until blood sugar >40mg/dL.
  • For persistent hypoglycemia despite above measures:
    • Increase rate of glucose infusion stepwise in 2mg/kg/min*increments up to 12-15mg/kg/min glucose. Use increased volume with caution in infants where volume overload is a concern. Maximal concentration of glucose in peripheral IV is D12.5.
    • If infant requires IV dextrose concentrations >12.5%, insert central venous catheter.
    • Do not use D25W or D50W IV or large IV volume boluses as this creates rebound hypoglycemia in infants who are hyperinsulinemic. In addition, administration of D25W or D50W can cause dangerous increase in plasma osmolarity.
  • If hypoglycemia is not controlled with above measures:
    • Obtain Endocrine Consult to guide further diagnostic evaluation and management.
    • While awaiting consult, send blood (while blood sugar is low) for glucose, plasma cortisol, growth hormone and insulin concentrations
    • Further management may include glucocorticoids, diazoxide, somatostatin or pancreatectomy.

Calculate rate of glucose administration

Use either of the following formulas:

  • (% glucose x mL/kg/d)/144 = glucose infusion rate (mg/kg/min)
  • (% glucose x mL/h)/(6 x body weight in kg) = glucose infusion rate (mg/kg/min)

Persistent Hypoglycemia

  • Check insulin, c-peptide, GH, cortisol, beta hydroxybutyrate, UA
  • Increase volume by 30cc/kg/d
  • Increase glucose to 12.5%

If continues for >3 d: consult endocrinology, or sooner

Disposition

  • Admit
    • Weaning IV dextrose infusion: When blood glucose has been stable for 12-24 h, begin decreasing IV infusion by 1-2 mL/hr q3-4 hours if blood glucose remains >60mg/dL.

See Also

References