Andrew:
the case you describe does not fit the "typical" SIDS profile where a child
is found apenic  in bed by the parents after a night of sleeping.  The
abnormal glucose and elevated WBC may indicate that the child was septic.
Also the possiblity of a congenital defect must be considered.  This defect
may not have been yet diagnosed.
As you noted the AED is not designed for a child that young.  Aggressive
airway management is the key in a pre-hospital BLS setting.
I can think of no other obvious treatments or methods that would have been
available to you in the care of this child.  Contact the ER and see if any
cause of death was every discovered.  If not, a call to the Medical Examiner
may help you discover the cause.
Good Luck,
Michael Malecki, RN, AEMT
 * Evaluation copy of Silver Xpress. Day # 927
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