The result for the time of retaining needks of these two groups and phlebitis taking place is that time for retaining is≤4 days to 7 days. The result is evenly χ2=5.54,P<0.01,the retaining time is 5～6 days,the result is χ2=15.66,P<0.005. Conclusion:moxibusion is effective in preventing phlebitis.
Other risk factors are prolonged catheter indwelling time, lack of asepsis during CVC insertion, and frequent manipulation of the catheter.
Effects of CVC tunnelling on infection rates depend to a large extent on indwelling time and the quality of catheter care.
Indwelling time and risk of infection of dialysis catheters in critically ill cancer patients
Mean birthweight (1815 versus 3313 g) and mean gestational age (32.3 versus 38 weeks) were significantly lower and indwelling time of the catheters (18 versus 11 days) was significantly longer in group A.
The rate of colonization is 33, 50 and 54% when indwelling time is less than 4 weeks, 4-6 weeks and more than 6 weeks, respectively.
The biological activity on cancer cells and the pharmacokinetics have also been evaluated, showing a very high liver-to-skin ratio and short retention time in tissues.
Of four organic solvents studied, acetonitrile proved to be the most efficient based on the retention time of perchlorate and 4-CBS.
The nitrogen removal rate can be obtained up to 66.7% with solids retention time (SRT) of 45 d, C/N value of 10, and F/M ratio of 0.1 g COD/(g MLSS·d).
Surprisingly, in the corresponding control set (cultivation of laccase-negative clone without atrazine) an unidentified metabolite having a retention time and UV-spectrum similar to those of atrazine was also found.
Retention Time Locking in the Determination of Narcotic Drugs by Chromatography and Chromatography-Mass Spectrometry