Résumé
Objective To investigate the relationship between MRI signal,pathological changes and neurological function after sciatic nerve injury in rabbits.Methods Twenty New Zealand white rabbits were randomly and evenly divided into 5 groups,and the right sciatic nerve crush models were established.T2 fat suppression fast recovery spin echo (T2 fs FRFSE) sequence scanning was performed 3 days,7 days,2 weeks,3 weeks and 4 weeks after injury,and TE was set as 30,60 and 90 ms,respectively.Signal intensity ratio (SIR) and relative signal intensity (△S) of proximal and distal part of injured nerve and control side nerve were measured.The relationship between SIR,△S,pathology and rabbit lower limb nerve function were analyzed.Results In the distal part of injured nerve,SIR and △S increased 3-7 days after injury,pathological results showed vacuolar degeneration,and basic toe function lost was found.SIR and △S reached the peak 2 weeks after injury,with most serious disintegration of myelin and toe function disable.SIR,△S and toe function disable gradually recovered,and the nerve regenerated at 3-4 weeks after injury.The injure display rate of T2 fs FRFSE images with TE=90 and 60 ms,SIR of both distal and proximal part of injured nerve were higher than those on images with TE=30 ms (all P＜0.05).Conclusion SIR and △S changes on T2 fs FRFSE imaging can be used to predict rabbit nerve injury.
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Objective To explore the relationship among nurses′perceptions of patient safety culture, nursing practice environment and the report barrier of nursing adverse event. Methods Totally 513 registered nurses from six hospitals in Zhengzhou were investigated with Patient Safety Culture Assessing Scale, Work Environment Questionnaire and Report Barriers Questionnaire. Results The mean scores of nurses′perceptions of patient safety culture, nursing practice environment and report barriers of nursing adverse events were (3.85±0.55), (3.84±0.53) and (2.47±0.55). The nurses′perceptions of patient safety culture were positively correlated to nursing practice environment (r=0.393,P<0.01), negatively correlated to report barriers of nursing adverse events (r=-0.372,P<0.01). The influencing factors of nurses′perceptions of patient safety culture were colleague relationship, punitive culture, allocation of medical resources, marital status, quality control, significance of report, gender and education, which could explain 33.8 percent for the variances. Conclusions The level of nurses′perceptions of patient safety culture is higher than the average level. The nursing managers should build supportive nursing practice environment and the non-punitive reporting system of nursing adverse events. Cultivate the beliefs and attitudes of nursing safety and focus on the impact of occupational stress to patient safety in order to enhance safety nursing.
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Objective To determine the relationships among the balance between nurse's work and family,the nursing practice environment and demission intention.Methods A total of 351 nurses were recruited from 5 hospitals in Zhengzhou by convenience sampling method.They were investigated using the Questionnaires for balance between nurse's work and family,the nursing practice environment and demission intention.Results The mean scores of the balance between nurse's work and family,the nursing practice environment and demission intention was (3.09±0.46),(2.86±0.48),(2.51 ±0.57).The predictors of demission intention of nurses were rational allocation of resources,age,work disturbs family,and family promotes work.Conclusions The levels of the balance between nurse's work and family,the nursing practice environment and demission intention are all in the medium.The balance between nurse's work and family and the nursing practice environment have direct positive influence on demission intention.