ABSTRACT
Background and Objectives: DWI is one of the useable sequences in MRI which currently being used in the assessment of vertebral column especially for malignant or benign causes. Considering that few studies have been performed regarding the use of DW sequences in spondylitis differentiating of disease with degenerative changes of vertebral yet; hence we intended to found the diagnostic value of DW sequence in spondylitis differentiating of infectious from degenerative changes of end plate type 1 with designing this study
Materials and Methods: This study was carried out on patients who referred to the Pejvak MRI center with spondylitis lesions and osteochondrosis grade I, involving the vertebral column during 2012-2013; and to differentiate these lesions was used the T1, T2 and DWI sequences. Obtained results were analyzed by SPSSv16 statistical software
Results: In this study, in T1WI sequences the images of both groups was hyposignal and in T2WI sequences was hypersignal [p=0.01]. In DW sequence with b value of 50, 400 and 800 [s/mm[2]] was observed that the signal changes in higher b value was apparent and in lower b value both detection had many similarities to each other due to the annoying effect of T2 Shine-through. As well as the mean of ADC map in spondylitisis images] 1.31 +/- 0.24x 10-3 mm2 /s[was less than osteochondrosis grade I with a mean ADC map [1.79 +/- 0.24x 10-[3] mm[2] /s] P<0.001]
Conclusion: The results of this study showed images with high b value could be having a good differentiation to distinguish the spondylitis from osteocondrosis
ABSTRACT
Venous and arterial catheters are used ordinary for continuous hemodynamic evaluation in cardiac surgery intensive care units. The catheters are one of the most important risk factors for nosocomial infection and mortality of hospitalized patients. The aim of this study was to evaluate the rate of bacterial colonization of intravascular catheters and catheter related bloodstream infection in Shahid Madani intensive care unit. 150 admitted patients that had intravascular catheter for more than 48 hours were enrolled in this study during one year period the tip segment of catheters and insertion site cultures were assessed. The rate of colonization was 13[8.7%]. the isolated bacteria were Escherichia coli [23.1%], Pseudomonas aeruginosa [23.1%] staphylococcus aureus [7.7%], coagulase negative staphylococcus [7.7%], Proteus vulgaris [7.7%], Stenotrophomonas maltophilia [7.7%], Candida albikans [7.7%], nonfermentative gram negative bacilli [7.7%] and Acinetobacter spp [7.7%]. The rate of catheter colonization was acceptable in comparison to the other studies. The most common isolated bacteria were Escherichia coli and Pseudomonas aeroginosa. In this study, the important risk factors were duration of catheter use, duration of hospitalization and positive blood culture