1729 CORRELATION OF PNEDMOGRAM FINDINGS WITH CLINICAL APNEA/BRADYCARDIA

Abstract

The pneumogram (PCG) has become a common test to evaluate clinical apnea/bradycardia (A/B) in infants. We compared 12 hour PCG results with evidence of A/B. Over an 11 month period, 305 PCGs were evaluated at RPSLMC, representing a heterogenous group of NICU patients, Near-Miss SIDS, and SIDS Sibs, both on and off theophylline. Individuals were often represented more than once. Patient charts were reviewed for evidence of A/B within 2-3 days of the PCG. Insufficient clinical data resulted in deletion of 88 PCGs, leaving 217 PCGs for analysis. Of the 65 PCGs coincident with A/B, 56 were abnormal. Of the 152 coincident with no A/B, 65 were abnormal. Individual parameters correlated as follows:

Mean PB in those with A/B was 1.8% total sleep time and in those without was 1.7% (N.S.). Mean A₆D in those with A/B was 0.92%, and in those without was 0.65% (p=0.05). In this population, we find: 1) most patients with clinical A/B have an abnormal PCG; 2) an abnormal PCG does not predict clinical A/B; 3) PB did not discriminate infants with clinical A/B.

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