To analyze the problems existing in each link of critical value reporting system in ultrasound department, and on this basis, to propose the relevant strategies.

PDCA method was used to carry out targeted management intervention on the problems in each link of the implementation process of "critical value" report. The "critical value" report rate, record qualification rate, follow-up success rate, and diagnostic coincidence rate before and after management were compared by χ² test to analyze the effect of PDCA targeted intervention measures.

After PDCA intervention, the report rate increased from 80.0% to more than 99.5% (χ²=35.446、0.010、0.148, P<0.05); the follow-up success rate increased from 98.7% to 100% (χ²=4.703, P<0.05); the record qualification rate increased from 89.3% to 100% (χ²=33.782, P<0.001); the diagnostic coincidence rate was improved, but the difference was not statistically significant.

Timely PDCA intervention can effectively improve the "critical value" report rate, record qualification rate, and follow-up success rate to ensure medical safety.