Comparison of perfusion index and blood gas values in determining acute kidney injury with AKIN and RIFLE scoring systems

Aim:Our study aimed to evaluatethe peripheral perfusion index values of patients diagnosed with acute kidney failure in the emergency department and compare them with the AKIN and RIFLE scoring systems. Materials and Methods: The study commence dafter obtaining ethical approval from the Namik Kemal University Medical Faculty in Tekirdag on 26.07.2022 with the reference number [2022.143.07.10]. This research is a prospective descriptive study. Results: A total of 96 patients were included in this study. Methodologically, the study was divided into two groups: 66 cases (69%) and 30 controls (31%). Statistically significant differences were observed between the case-control groups in terms of hypertension (p=0.001), CAD (p=0.009), pH (p=0.015), HCO3 (p=0.001), sodium (p=0.001), Perfusion Index (p=0.001), Urea (p=0.001), and Creatinine (p=0.001). Accordingtothe AKIN Score, 63.6% of thepatients were determined to be in Stage 1. Stages 2 and 3 were found to be 28.8% and 7.6%, respectively. Statistically significant differences were found between the AKIN score stages in terms of pH, CO2, HCO3, Perfusion Index, Urea, Creatinine, and Potassium (p<0.05). According to the RIFLE Index, the majority of the patients were at Risk (66.7%, n=44), followed by Injury (21.2%, n=14), and lastly, 6.1% were identified with failure and loss. Statistically significant differences were detected between the RIFLE index stages in terms of O2, CO2, HCO3, Perfusion Index, Urea, and Creatinine (p<0.05). Conclusion:In this study, the potential role of the perfusion index (PI) and blood gas values in the early diagnosis of AKI was compared with the AKIN and RIFLE scoring systems. It was concluded that both the AKIN and RIFLE indices are effective tools in assessing the stages of acute kidney injury. KeyWords; AKIN Index, RIFLE Score, Perfusion Index, AKI.