0.05). CONCLUSION: Lornoxicam can relief pain in patients after open heart surgery safely and efficiently, and reduce the morphine consumption.

Objective To evaluate the effects of magnesium sulphate on the analgestic efficacy of nerve block analgesia with ropivacaine. Methods Sixty cases who used femoral nerve block analgesia after unilateral total knee arthroplasty under the general anesthesia were selected,and according to digital table they were randomly divided into two groups( n=30 each):magnesium sulfate plus ropivacaine( group M) and ropivacaine( group C) . The solution (20mL) of 0. 2% ropivacaine and 0. 15% magnesium sulphate were administered to group M,and 20mL solution of 0.2% ropivacaine was given to the group C. The pain score was measured by visual analogue scale(VAS). The supplementary usage and cumulative dosage of morphine were recorded and the analgesia relevant complications were observed. Results The results of this study indicated that 4h,8h,12h and 24h after the operation,the VAS scores had no statistically significant difference ( all P > 0. 05 ) at rest, which in group M was significantly decreased compared with group C at 12h(t=2. 800,P=0. 009) and 24h(t=2. 934,P=0. 012) after treated with continuous passive motion ( CPM) postoperatively. The cumulative dosages of morphine when patients undergo CPM of knee joint in group M were (2.78 ±0.32)mg,(2.05 ±0.16)mg,respectively,which were significantly lower than those in the groupC[(4.10±0.85)mg,(2.44±0.25)mg](t=7.960,2.632,all P<0.05).No obvious analgesia relevant complications occurred in both two groups. Conclusion Magnesium sulphate can enhance the efficacy of postopera-tive femoral nerve block analgesia with ropivacaine, reduce the usage of morphine without increasing the analgesia relevant complications.

Objective To evaluate the role of Toll-like receptor 4 (TLR4) in non-medullary andmedullary cells in lung ischemia-reperfusion (I/R) injury in mice.Methods Ten healthy male TLR4+/+ in non-medullary cells/TLR4+/+ in medullary cells (WT/WT) mice,10 TLR4-/-in non-medullary cells/ TLR4-/-in medullary cells (KO/KO) homozygote mice,10 TLR4+/+ in non-medullary cells/TLR4-/-in medullary cells (WT/KO) mice,and 10 TLR4-/-in non-medullary cells/TLR4+/+ in medullary cells (KO/WT) heterozygote mice,aged 6-8 weeks,weighing 20-25 g,were used in the study.Lung I/R was induced by occlusion of the left hilum for 60 min followed by 240 min of reperfusion in anesthetized mice.Blood samples were obtained from the femoral artery at 240 min of reperfusion for blood gas analysis,and the oxygenation index (PaO2/FiO2) was calculated.The animals were then sacrificed and lung tissues were immediately removed for determination of wet/dry weight ratio,myeloperoxidase activity and contents of tumor necrosis factor-alpha,interleukin-1beta (IL-1β) and IL-6 (by enzyme-linked immunosorbent assay) and for microscopic examination of the pathological changes of lungs which were scored.Results Compared with WT/WT mice,the oxygenation index was significantly increased in sequence,and lung injury scores,wet/dry weight ratio,myeloperoxidase activity and contents of tumor necrosis factor-alpha,IL-1β and IL-6 were decreased in sequence in WT/KO,KO/WT and KO/KO mice (P＜0.05).Conclusion TLR4 in non-medullary cells plays a rnore important role in lung I/R injury than that in medullary cells of mice.