Evaluation of the performance of biochemical ratios and albumin’s gradient in the etiological exploration of ascitic fluid
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Abstract
Biochemical exploration of effusion fluids plays a crucial role in the diagnosis of un-derlying pathologies. This study aimed to evaluate the performance of biochemicalratios and the albumin gradients in the diagnostic process of ascitic fluids.
Methods-The study was prospective, involving 56 samples from ascitic patients. For each patient, five biochemical parameters (glucose, protein, albumin, LDH, and total amy-lase) were performed in ascites and plasma samples. The ascites/plasma protein, LDH ratios, and serum-ascites albumin gradients (SAAG), were calculated to evaluate their
diagnostic relevance.
Results - Twenty-eight adult patients presenting ascites were included in this study,18 women (64.28%) and 10 men (35.71%) with an M/F sex ratio of 0.55. The most effi-cient parameters to distinguish the transudate/exudate concept were: Ascitic proteins (p =0.01), ascitic/plasma proteins (p =0.004), ascitic LDH (p =0.011), ascitic/plasma LDH ratio (p =0.013), ascitic albumin (p = 0.012), ascitic albumin/plasma ratio (p = 0.002) and ascitic glucose/plasma ratio (p = 0.02). A threshold of 14 g/L of Albumine had a better positive predictive value than a threshold set at 20 g/L (73 vs 46%). The sensitivity, spe-
cificity, diagnostic efficiency,and positive and negative predictive values for SAAG were 100%, 64%, 78%, 64%, and 100% respectively, and for the modified Light’s criteria 78%, 86%, 82%, 80%, and 82% which hadbetter diagnostic efficiency and specificity than the classic Light’s criteria with the respective comparative value 82 vs 78% and 86 vs 57% but less sensitivity (78 vs 100%). The criteria H20-30, H25, and TAL had good diagnostic efficiency with 75%, 75%, and 78% respectively.
Conclusion -The integration of biochemical ratios and the albumin’s gradient signifi-cantly improves the differential diagnosis of ascites. It is essential to promote the use of these parameters in clinical practice to improve the treatment of patients with ascites.
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