Report received of two false negative hcg results for emergency department patients using cardinal health rapid test hcg combo 30t.Customer questioning why a negative result would eventually become positive after read time.Customer did not provide patient specific information.Customer reported they used 3 drops, read time 3 mins received negative results (then read again greater than 4mins, maybe as long as 30mins later, and result was positive).No reported adverse patient sequela.No additional information provided.
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