To explore the effect of quality control circle (QCC) activity in improving the medical quality of residents in ultrasound department.

From November 2020 to March 2021, the leaders of eight subspecialized groups at the ultrasound department of the First Affiliated Hospital of Nanchang University formed a "concentric circle". The problems existing in the medical quality of residents were analyzed according to the management method of QCC activity, and corresponding measures and implementation plans were formulated. In addition, the end-of-work quality of ten residents before QCC activity (November 2020), during QCC activity (December 2020 and January and February 2021), and after QCC activity (March 2021) was compared by analysis of variance, and pairwise comparisons between the individual months were performed using the Bonfermoi's test.

After the implementation of QCC activity, the end-of-work quality of the ten residents was significantly improved, and the difference between each month was statistically significant (F=135.047, P<0.001). The end-of-work quality before and after QCC activity was (44.21±1.39) points and (64.38±2.54) points, and the difference between them was statistically significant (P<0.01). During the implementation of QCC activity, the end-of-work quality continued to increase [(52.20±1.71) points vs (57.22±2.31) points vs (62.35±2.24) points], and the difference was statistically significant (P<0.01). The end-of-work quality was (62.35±2.24) points vs (64.38±2.54) points in the month after the implementation of QCC activity (February) and after QCC activity (March), and there was no statistical significance between them (P=0.345).

The QCC activity can effectively improve the quality of medical treatment and improve the comprehensive ability of residents.