Study On The Length Of Umbilical Cord Stump And Its Correlation With Infection In Infants With Delayed Cord Clamping

ObjectiveTo study the length of umbilical cord stump in infants with delayed cord clamping(DCC)and its related indicators,and detect the microbial distribution of umbilical secretions in research subjects.To find the appropriate length of the umbilical cord stump in newborns with delayed cord clamping.MethodsSelected 200 newborns with DCC born in a three-level hospital in Shijiazhuang City,Hebei Province.They were randomly divided into two groups A and B,with 100 people in each group.The umbilical cord stump of newborns in group A was 1-3 cm,and the neonatal umbilical cord stump of group B was 4-6 cm.1.The umbilical cord bleeding,umbilical skin redness and abrasions were observed in two groups of neonates.A telephone interview with parents of newborns asked about umbilical granuloma,omphalitis,and umbilical cord shedding,and evaluation of the length of the umbilical cord stump.2.On the fourth day of birth,the umbilical cord secretions were collected with Sterile swab and sent to the microbiological room for bacterial culture.After 24 hours,colony counting and isolation and culture were performed.The isolates were cultured for 24 hours.Individual colonies were aspirated into sterile tubes with sterile filter paper,frozen at-80℃.After batch resuscitation,mass spectrometry analysis was performed to obtain the bacterial identification results.3.SPSS17.0 statistical software was used to analyze the difference between the two groups of neonatal observation indicators and test indicators.Results1.There was no significant difference between the two groups in terms of gender,birth weight,Apgar score within one minute after birth,neonatal mother’s age,gestational age,delivery methods,etc.(P>0.05).2.Comparison of clinical observation and telephone return visit indicators:There was no significant difference in umbilical cord bleeding rate,umbilical cord skin redness and abrasion rate,umbilical cord shedding time,and incidence of omphalitis in the two groups(P>0.05).The effect of umbilical cord stump length on family disinfection was statistically significant(P < 0.05),The A group was higher than the B group.The percentage of people who were satisfied with the length of the umbilical cord stump was statistically significant(P<0.05).The B group was higher than the A group.3.The bacterial culture identification results of newborns in the two groups of neonatal umbilical secretions were compared: the number of colony counts per square centimeter in umbilical cord was statistically significant(P<0.05).The A group was higher than the B group.Among the detected bacteria,the distribution rate of Staphylococcus aureus was statistically significant between the two groups(P<0.001).The A group was higher than the B group.However,there were four dominant genera:Staphylococcus aureus,Escherichia coli,Staphylococcus haemolyticus,Staphylococcus epidermis.There was no significant difference in the distribution of dominant bacteria among the two groups(P>0.05).Among the dominant genus,the distribution rates of Staphylococcus aureus,Escherichia coli and Staphylococcus epidermidis were statistically significant(P<0.05).Among them,the distribution rate of Staphylococcus aureus was higher in group A than in group B.The distribution rates of the latter two were higher in group B than in group A.There was no significant difference in the distribution rate of Staphylococcus haemolyticus between the two groups(P>0.05).Conclusion1.The incidence of neonatal umbilical granuloma with 1-3cm length of umbilical cord was higher than that of 4-6cm with a terminal length of umbilical cord.Attention should be paid to it.2.In umbilical family care,the length of umbilical cord stump 1-3cm affecteddisinfection operation.Parents were more satisfied with the length of umbilical cord stump of 4-6cm.3.In the colonization of umbilical cord secretions:the number of colonies and the dist ibution rate of Staphylococcus aureus of umbilical cord stumps was 1-3 cm in length was higher in the umbilical area of newborns.4.It was more appropriate to preserve 4-6cm of umbilical cord stump in infants with delayed umbilical cord clamping.