Clinical Trial of Fluid Infusion Rates for Pediatric Diabetic Ketoacidosis

incomplete Journal Club Article
Kupperman, et. al.. "Clinical Trial of Fluid Infusion Rates for Pediatric Diabetic Ketoacidosis". New England Journal of Medicine. 2018. 378(24):2275-2287.
PubMed Full text

Clinical Question

Does the rate or NaCl content (1/2 NS or NS) of IVF’s have an effect on neurologic outcomes in pediatric DKA?

Conclusion

Neither the rate nor NaCl content of the IVF has a significant effect on development of neurologic outcomes in pediatric DKA

Major Points

Cerebral edema is a dreaded outcome of DKA, it appears that the rate and type of fluid administered to pediatric patients in DKA doesn't change their risk for developing this condition.

Study Design

  • Multicenter randomized control trial.
    • Randomization occurred by variable length blocks per center, and randomization was stratified by GCS and center.
  • Occurred at 13 PECARN centers

Population

Patient Demographics

0 to 18 years of age, 1255 children, some randomized twice during study period giving 1361 encounters for the primary analysis

Inclusion Criteria

Diagnosis of DKA (glucose >300, pH <7.25, bicarb <15)

Exclusion Criteria

Underlying disorders that affect cognition, alcohol/narcotic use, head trauma, DKA having already received substantial treatment, pregnant, or factors that treating physician wanted specific fluid and electrolyte replacement. GCS 11 or lower excluded after year 2 of study (thought that fluid regiment shouldn’t be determined on randomization)

Interventions

  • Rapid or slow infusion of IVF's
    • rapid = replace 1/2 fluid deficit during initial 12 hours + maintenance fluids
    • slow = replace deficit + maintenance evenly during 48 hour period
  • 0.45% NaCl or 0.9% NaCl
  • All patients received a 10 cc/kg fluid bolus
  • Rapid group could receive additional 10 cc/kg fluid bolus

Outcomes

Primary Outcome

  • Decline in mental status (GCS <14) in any hour within 1st 24 hours
    • 3.5% developed GCS <14, no difference among groups

Secondary Outcomes

Clinically apparent brain injury (initiation of hyperosmolar therapy, intubation, death), short term memory, and memory and IQ 2-6 months after recovery

  • 1.6% required hyperosmolar therapy, no difference among groups
    • 0.9% (12 patients) had clinically apparent brain injury, one death with remaining recovering without overt neurologic deficit, no difference among groups

Neurocognitive assessment

  • 30% of patients lost to follow-up or declined to return
  • no difference in treatment groups with >60% that did follow-up

Subgroup analysis

8 different subgroups

  • Relative risk of decline in GCS didn’t differ among subgroups
  • Forward digit span scores improved quicker in rapid rehydration subgroup with lowest PCO2
  • Backward digit span scores improved quicker in rapid rehydration subgroup with lowest pH

Criticisms & Further Discussion

  • Clinicians not blinded to intervention
  • Low incidence of clinically apparent brain injury (<1%) makes hard to study
  • Is GCS a good marker of cerebral edema?
  • Repeat episodes of DKA in same patients (decreases power)
  • Despite 10 cc/kg being the "fast" group, it's still fairly conservative when considering 20 cc/kg is the standard pediatric bolus
  • During the creation of the protocol and powering of the study, they estimated a 20% incidence rate of drop in GCS to <14, however primary outcome only occurred in 3.5%
  • No evaluation of balanced crystalloids
  • Did an analysis of both per-protocol and per-treatment received
    • No significant difference

External Links

See Also

Funding

Supported by the Eunice Kennedy Shriver National Institute of Child Health and Human Development (grant U01HD062417) and the Emergency Medical Services for Children Network Development Demonstration Program of the Maternal and Child Health Bureau, Health Resources and Services Administration, under cooperative agreement (awards U03MC00008, U03MC00001, U03MC00003, U03MC00006, U03MC00007, U03MC22684, and U03MC22685).

References