Ömer KARACA, Ahmet Fevzi ÖZGÜR, Sevsen KULAKSIZOĞLU, Rafi DOĞAN, Hüseyin Ulaş PINAR

The effect of pregabalin on tourniquet-induced ischemia-reperfusion injury: a prospective randomized study

Background/aim: The aim of this study was to investigate the efficacy of pregabalin on ischemia-reperfusion injuries.Materials and methods: Fifty-four patients were randomly assigned into 2 groups. A 150-mg tablet of pregabalin was given the nightbefore and then 1 h before the operation for patients in Group P (pregabalin group, n = 27). A placebo was given to patients in Group C(control group, n = 27) at the same times. After combined spinal-epidural anesthesia was performed, venous blood samples were takenbefore tourniquet inflation (t1), just before tourniquet deflation (t2), and 20 min after tourniquet deflation (t3) for the analysis of totalantioxidant status (TAS), total oxidant status (TOS), catalase (CAT), and ischemia-modified albumin (IMA).Results: There was no significant difference in TAS levels between the groups for the t3 period. However, the TAS in Group P wassignificantly higher in the t3 period than the t2 period (mean ± SD, 0.46 ± 0.1 vs. 0.38 ± 0.2 mmol of Trolox equivalent/L, respectively; P< 0.05). The CAT level in the t3 period was significantly higher in Group P than Group C (mean ± SD, 53.04 ± 32.1 vs. 35.46 ± 17.2 µmol/formaldehyde, respectively; P < 0.05). In the t3 period, the TOS was significantly lower in Group P than Group C (mean ± SD, 11.97 ±5 vs. 18.29 ± 9.9 pg/mL, respectively; P < 0.05). The TOS in Group P was significantly lower in the t3 period than the t2 period (mean ±SD, 11.97 ± 5 vs. 18.98 ± 10.7 pg/mL, respectively; P < 0.0001).Conclusion: Pregabalin has no marked antioxidant activity, but it contributes to the antioxidant defense system of an organism.

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