Patients with Chronic Wounds - Different Concentrations of Ecoli - Medical Sciences Assignment Help

Assignment Task :

Description of Methodology:

This study involved the development of an electrochemical sensor to detect Ecoh bacteria in patients with chronic wounds. The electrochemical sensor uses a technique called "impedance" to measure Ecok DNA in the sample. In this study, samples of wound fluid containing different concentrations of Ecoli (cellslmL) were taken from patients. The performance of the impedance sensor was evaluated by measuring the impedance (to) over a range of concentrations (0 to 70.000 Ecofi cells/mL). When developing a sensor it is important to correctly establish the limit of detection (LOD). The LOD can be defined as a baseline. instrumental or zero value + 3 standard deviations. The measured value from a particular sample concentration must be greater than the LOD in order to achieve successful detection. 
Finally, a compound called TCEP (tris(2carboxyethypphosphine) was used to prepare the sensor surface. The idea behind this experiment was to determine if TCEP use could improve the performance of the Ecoli test. The performance of the sensor was measured using electrodes prepared normally and electrodes pre-treated with TCEP and samples containing 50.000 cellsimL. 
 

Key research questions to be addressed:

I) What is the relationship between impedance (kfl) and Ecofi concentration?

2) What is the limit of detection?

3) How do the responses of non-treated and TCEP treated electrodes compare to each other? Are they significantly different? Comment on the effect of TCEP on assay performance_ 

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