Retrospective stuclies on lactation mastitis distribution in breast

Objective To find out the factors which would be likely to affect the occurrence of lactation mastitis.Methods 216 patients with lactation mastitis,who met our grouping criteria,were chosen for survey and clinical data collection.Their age,time of onset,mode of delivery,post-partum colostrum time,mastering of breast-feeding skills,feeding habits,occurring site of their mastitis and other data were input into SPSS 17.0 software,respectively,to perform retrospective analysis.Results Patients' average age and their age of first breast-feeding were all 30 years old ; the average age of their first pregnancy were 27 years old.Their initial post-natal breast-feeding was about 2 to 4 days.The onset of incidence of mastitis was about 28 days post-natal.First,second and third pregnancy patients represented 1/3 of the total patients respectively.63.4％ patients had cesarean delivery and only 36.6％ patients had vaginal delivery; 91.7％ were outpatients and 8.3％ patients were inpatients.10.6％ patients had abscess and 89.4％ patients hadn't.The distribution ratio of inflammation in the upper outer,lower outer,lower inner and upper inner quadrants of the breast was 30.6％,48.1％,19％,2.3％ respectively.If the mode of delivery is considered as a factor to investigate incidence time of mastitis and postpartum colostrums time,no significant difference between the two groups was found (P ＞ 0.05).Our survey indicated that 79.2％ patients did not have any knowledge of breastfeeding,8.8％ patients got the breast-feeding knowledge from their mothers,11.6％ patients got the breastfeeding knowledge from books or web resources,only 0.5％ of the patients participated in the training of breast-feeding.76.9％ patients never had breast massage,19％ of patients had a few times of massage,2.8％ of patients had occasional massage,and only 1.4％ of patients had regular breast massage with the help of their family.85.6％ patients didn't have their breasts emptied from breast-feeding to incidence of mastitis,11.6％ patients occasionally emptied their breasts,and only 2.8％ of patients can ensure one side of the breasts emptied daily.56.5％ patients used lying position with the lower breast as the most common breastfeeding posture,37％ patients used sitting position,only 6.5％ of patients used lying position with the upper breast.The correlation analysis of breeding posture and occurring site of lactation mastitis revealed that the Spearman coefficient was-0.14,P value was 0.04,which is statistically significant,suggesting there is correlation between occurring sites of lactation mastitis and breeding posture.Conclusions Mothers need to master breast-feeding skills including breast massage,breast milk emptying and breast-feeding postures to prevent the occurrence of mastitis.Furthermore,gravity probably affects the occurring sites of mastitis through its impact on patients' preferred breast-feeding postures.