A comparision of radial artery cannulation by fixed angle (conventional switch cannula) technique versus variable angle (SK-TRAC) technique.

The data will be collected using a predesigned template which will be filled by the concerned physician involved in the immediate treatment of the patient. The collected data variables obtained will be compiled by using an excel spreadsheet. The baseline patient characteristics are presented as frequencies for the categorical variables and as the means and standard deviations or medians and inter-quartile ranges for continuous variables. After appropriate data filtration, the data sheet will be transferred and analyzed using Statistical Package for Social Sciences (SPSS vs. 22.0). Comparison of quantitative variables between the study groups will be done by using Student t-test and One-way Analysis of Variance (ANOVA) test for independent samples for parametric and non-parametric data respectively. For comparing categorical data, Chi square (χ2) test or fishers exact test will be performed. Binary logistic regression will be conducted to ascertain significant predictors for successful cannulation.