Failed heel blood test may be related to congenital diseases, and may also be caused by improper specimen collection methods.
1. Congenital diseases, heel blood test failure is mainly related to the physical condition of the child, clinically, congenital hypothyroidism, phenylketonuria and other diseases may lead to heel blood test failure.
2. Improper specimen collection method, if the amount of blood is too small or contaminated during the collection process, it may lead to the failure of heel blood test.
Generally speaking, if the heel blood test fails to pass, you should consult a doctor in time. If it is caused by improper collection, you don’t need to be overly nervous, and you can collect it for the second time, and if it is caused by congenital diseases, it is recommended to consult a doctor in time for examination and treatment.