Patient's question:
The risk value for Down syndrome screening 21-trisomy syndrome is 1/242. The cutoff value for high risk is greater than or equal to 1/270, critical risk is 1/271-1/500, and low risk is less than 1/500. Please help diagnose whether it is serious or not? Urgent!Doctor's answer:
Analysis of the condition:1. Down syndrome, also known as trisomy 21, refers to a condition where the patient has an extra chromosome in the 21st pair (while the normal number is one pair). Down syndrome screening is performed by measuring the levels of AFP and HCG in the pregnant woman's serum, combined with the mother's age, weight, and gestational age to calculate the risk value. The critical value is 1/275. A value greater than this indicates a high risk, while a value lower than this indicates a low risk. The probability of having Down syndrome (DS) in the general population (under 37 years old) is 1/750. If the screening result is high-risk, amniocentesis is recommended, but even a high-risk result does not necessarily mean the child has Down syndrome.
Advice: For safety's sake, it is still recommended to undergo DS screening! Children with Down syndrome have severe intellectual disabilities, cannot live independently, and often suffer from complex cardiovascular diseases, requiring long-term care from family members. This can impose a significant emotional and financial burden on the family.