Abstract
Purpose
This study aimed to show the effect of propofol sedation on oxidative stress and inflammation resulting from ischemia-reperfusion.
Methods
After having obtained written informed consent from the patients and ethics committee approval, 36 patients were randomly allocated to 2 groups: group C, control and group P, propofol. Spinal anesthesia was administered to both groups with 15 mg bupivacaine. Patients in group P received a propofol infusion of 2 mg/kgBW/h and the patients in group C received a placebo infusion in an equal dose. Malondialdehyde (MDA), superoxide dismutase (SOD) and the total antioxidative capacity (TAC) levels were measured in venous blood samples prior to propofol or placebo administration (preischemia T0), 30 min after placing the tourniquet (ischemia T1) and 2 h after deflation of the tourniquet (reperfusion T2). High sensitivity C-reactive protein (hsCRP) and neutrophil levels were measured before propofol was administered (T0) and 12 h after reperfusion (T3).
Results
While serum MDA and SOD levels were significantly higher during the reperfusion period than the preischemic period, TAC levels were found to be low in the control group (p < 0.05). In the propofol group there were no differences between the preischemia-reperfusion periods with respect to MDA, SOD and TAC levels (p > 0.05). The neutrophil and hsCRP levels were observed to be increased to a lesser extent in the propofol group compared to the control group (p < 0.05).
Conclusions
Propofol infusion in addition to spinal anesthesia may reduce oxidative damage and the inflammatory response developing due to the tourniquet in total knee replacement surgery.
Zusammenfassung
Hintergrund
Ziel dieser Studie war es, die Wirkung einer Propofolsedierung auf oxidativen Stress und Entzündung als Folge einer Ischämie-Reperfusion festzustellen.
Methode
Nachdem die Zustimmung der Ethikkommission und die schriftlichen Einwilligungen der Patienten vorlagen, wurden 36 Patienten randomisiert einer der beiden folgenden Gruppen zugewiesen: Gruppe K (Kontrollgruppe), Gruppe P (Propofolgruppe). In beiden Gruppen wurde eine Spinalanästhesie mit 15 mg Bupivacain durchgeführt. Während in der Gruppe P Propofol mit 2 mg/kgKG/h infundiert wurde, wurde der Gruppe K eine äquivalente Placeboinfusion verabreicht. In den venösen Blutproben der Patienten wurden vor der Verabreichung von Propofol oder Placebo (T0, Präischämie), in der 30. Minute der Tourniquet-Ischämie (T1, Ischämie) und 2 h nach der Öffnung des Tourniquets (T2, Reperfusion) die Konzentrationen von Malondialdehyd (MDA), Superoxiddismutase (SOD) und die totale antioxidative Kapazität (TAC) bestimmt. Des Weiteren wurden die Konzentrationen des „high sensitivity“ C-reaktiven Proteins (hsCRP) und der Neutrophilen vor der Verabreichung von Propofol (T0) und 12 h nach der Reperfusion (T3) gemessen.
Ergebnisse
In der Gruppe K waren die Serumkonzentrationen von MDA und SOD in der Reperfusionsphase signifikant höher als in der Präischämiephase, während die TAC-Werte niedriger waren (p < 0,05). In der Gruppe P war kein Unterschied zwischen den MDA- sowie SOD-Konzentrationen und der TAC in der Reperfusionsphase und in der Präischämiephase festzustellen (p > 0,05). Die hsCRP- und Neutrophilenwerte der Gruppe P waren weniger erhöht als die der Gruppe K (p < 0,05).
Schlussfolgerung
Die Verwendung einer Propofolinfusion zusätzlich zur Spinalanästhesie kann in der Chirurgie des totalen Kniegelenkersatzes zur Verringerung der im Zusammenhang mit dem Tourniquet entstehenden oxidativen Schädigungen und der entzündlichen Reaktionen führen.
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Özkan, D., Akkaya, T., Yalcindag, A. et al. Propofol sedation in total knee replacement. Anaesthesist 62, 537–542 (2013). https://doi.org/10.1007/s00101-013-2192-8
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DOI: https://doi.org/10.1007/s00101-013-2192-8