BACKGROUND:Laminar flow operating room used in artificial joint replacement can improve the aseptic conditions and can effectively prevent the infections after joint replacement.
OBJECTIVE:To compare the number of colonies during artificial joint replacement in laminar flow operation room and traditional operation room.
METHODS:300 patients with artificial joint replacement in hundred-level laminar flow operation room and 300 patients with artificial joint replacement in traditional operation room were selected, and al the patients had no infection. Then 100 patients with artificial joint replacement were randomly selected from the hundred-level laminar flow operation room and traditional operation room respectively. The number of colonies in operation room of two groups was compared before and after replacement.
RESULTS AND CONCLUSION:There was no significant difference in the number of colonies between two groups before replacement, and the settling bacteria number of the artificial hip replacement patients in the hundred-level laminar flow operation room was significantly smal er than that in the traditional operation room (P<0.05). The results indicate that compared with the traditional operation room, the hundred-level laminar flow operation room for artificial joint replacement has higher safety and can effectively prevent infections after replacement.

The clinical data of a case of neonatal bacterial meningitis complicated with posterior fossa subdural empyema in the West China Second University Hospital in December 2019 were retrospectively analyzed.The 3-day-old male newborn was admitted for jaundice with decreased intake for 1 day.Examinations on admission showed increased C-reactive protein.The count of karyocytes in cerebrospinal fluid (CSF) significantly increased, which were mainly neutrophils, and pyocytes could be found.The protein content in CSF increased, while that of glucose decreased.Both CSF culture and blood culture detected the presence of Escherichia coli.Enhanced magnetic resonance imaging (MRI) of the head indicated large abnormal signals in bilateral occipital extra-cerebellar spaces.T1-weighted images presented mixed low and high signals, and T2-weighted images presented high signals, and marginal enhancement was observed after enhancement.After 6 weeks of antibiotic treatment using Meropenem combined with Ceftazidime, the CSF index of the newborn patient returned to normal, and the subdural empyema of the posterior fossae subsided.Bacterial meningitis complicated with subdural empyema of posterior fossa is a rare and critical disease of the central nervous system.It is easily misdiagnosed due to the atypical clinical manifestations and early imaging features.The disease requires an adequate course of anti-infective treatment.Surgical removal of the empyema should be performed if the anti-infective treatment is unresponsive.