ABSTRACT
Un-transfected rabbit corneal endothelial cells (RCECs) were cultivated, using chitosan blend membrane 4ha (chitosan-hyaluronic acid), 631ha (chitosan-hyaluronic acid) and 631s (chitosan-chondroitine sulfate) as scaffold carriers. Their biocompatibilities were studied in regard to cell adherence, morphological changes, growth status and monolayer forming abilities. The results indicated that RCECs cultivated on 4ha and 631ha carriers tended to be aggregated and even desquamated to some extent in local areas, and even more severely on 631ha carrier. And the RCECs cultivated on 631ha carrier could form almost a monolayer 48h later, and those on 4ha carrier could not. Contrarily, the RCECs cultivated on 631s carrier were evenly distributed and were in good status of growth with a good adherence and fibroblast-like morphology which could form almost a monolayer 48h later. And a complete monolayer was formed and was tightly attached to the 631s carrier 72h later. From the above results, it can be concluded that 631s carrier is most probably an ideal scaffold carrier for RCEC cultivation. 631s carrier may have the potential for use in the development of tissue-engineered rabbit corneal endothelium.
Subject(s)
Animals , Rabbits , Biocompatible Materials , Chemistry , Cell Adhesion , Cell Culture Techniques , Cell Line , Cells, Cultured , Chitosan , Chemistry , Endothelium, Corneal , Cell Biology , Hyaluronic Acid , Chemistry , Membranes, Artificial , Tissue Engineering , Methods , Tissue Scaffolds , ChemistryABSTRACT
OBJECTIVE To discuss the methods to control hospital infection in stroke unit and care strategies.METHODS Analyzing the causes and factors for hospital infection in stroke unit with prospective,objective and retrospective methods,we found control methods and improvements for clinical care.RESULTS The infection rate in test group was 9.13%(113 cases)and in control group was 14.60%(174 cases).The former was significantly lower than the letter(?2=17.44,P
ABSTRACT
OBJECTIVE To establish the mechanism for monitoring,standardizing and alarming of relative risk factors to reflect the tendency of hospital infection.METHODS Data of hospital infection during six years were surveyed and analyzed completely.The prevalence baseline of hospital infection was chosen as the value to assess the control rate of hospital infection.The alarm value was set on the baseline.RESULTS The hospital infection revalence baseline and alarm value were used to assess the quality of infection control in whole hospital and each department objectively and accurately.These values could be also used to assess the effect of control of hospital infection among departments.They also could be used to survey the tendency of hospital infection and determine prevalence and outbreak of hospital infection.CONCLUSIONS Prevalence baseline and alarm value for hospital infection are valuable for preventing hospital infection and its outbreak.