Objective To explore the clinical value of Z score in assessing coronary artery lesions (CAL) of children with Kawasaki disease. Methods The clinical records of 102 children with Kawasaki disease from January 2012 to December 2016 in Gansu Provincial Hospital were retrospectively analyzed. The internal diameter of left main coronary artery (LMCA) and right coronary artery ( RCA) was measured by echocardiography (ECHO),and the incidence of CAL was preliminarily judged. The Z scores of LMCA and RCA were calculated on the basis of the coronary artery diameter,the age of the children and the body surface area,and the incidence of CAL was judged again. Results A total of 22 cases(21. 6%) of CAL were found in 102 cases by ECHO examination,of which 18 cases(17. 6%) of LMCA lesions,and 22 cases(21. 6%) of RCA lesions. A total of 33 cases(32. 4%) of CAL were found by calculating the Z score of coronary artery, of which 29 cases(28. 4%) of LMCA lesions and 33 cases(32. 4%) of RCA lesions. There was significant difference between two methods for determining LMCA lesions (χ2=3. 35,P＜0. 05),and there was no sig-nificant difference between two methods for determining RCA lesions (χ2=3. 01,P＞0. 05). Z score of coro-nary artery was more accurate to detect the CAL in Kawasaki disease,especially LMCA lesions. A large coro-nary artery aneurysm was found in the patients with the largest Z score by selective coronary angiography. Conclusion The Z score can be more conductive to assess the CAL in children with Kawasaki disease,and the higher the Z score,the more serious the CAL is.

Objective:To realize the bacterial distribution and antibiotic resistance in children with severe pneumonia in this region.Methods:A total of 203 children with severe pneumonia diagnosed in Gansu Provincial People′s Hospital from April 2018 to March 2020 were divided into 0-1, 1-3, 3-7 and 7-14 years old groups.Bronchoalveolar lavage fluid was collected for bacterial culture and identification, and antibiotic susceptibility tests were performed.Results:The positive rate of pathogens was 69.5% (141/203), including 72.3% (102 strains) of Gram-negative bacteria and 30.5%(43 strains)of Gram-positive bacteria.The infection rates were highest in 0-1 years old group and the lowest in 7-14 years old group, which were 45.2%(19/42) and 16.9%(10/59), respectively.The infection rates of Haemophilus influenzae, Escherichia coli and Branhamella catarrhalis in the 1-3 years old group were 30.30%(10/33), 33.33% (11/33), and 21.21% (7/33), respectively, which showed significant differences compared with other groups( P<0.05). The infection rate of Streptococcus pneumoniae in the 0-1 years old group was 42.9%(18/42), which was significantly different compared with other groups ( P<0.001). The resistance rate of Haemophilus influenzae to trimethoprim/sulfamethoxazole was 89.5%(34/38), and the Streptococcus pneumoniae to trimethoprim/sulfamethoxazole and tetracycline were both 82.4%(28/34). The highest antibiotic resistance rate of Escherichia coli was 34.6%(9/26), and the Branhamella catarrhalis to clindamycin was 56.3%(9/16). Conclusion:The dominant bacteria for severe pneumonia in children are Haemophilus influenzae, Streptococcus pneumoniae, Escherichia coli and Branhamella catarrhalis.The bacterial infection rate is highest within 1 year old, but gradually decreases with the increase of age.Haemophilus influenzae and Streptococcus pneumoniae have severe resistance to several antibiotics.