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For measurement of acetabular cup version angle, we recommend the use of Lewinnek and Liaw et al. methods both in AP-P and in AP-H, while Hassan et al.'s method is recommended in AP-P only, and Widmer and Ackland et al.'s methods in AP-H only.

Orthogonal frequency-division multiplexing (OFDM) systems are used to improve communication quality and capacity. This paper proposes using backpropagation neural networks (BPNNs) for channel estimation and equalization for OFDM systems. Simulation results show that the BER performance of the BPNN technique is better than other considered technique.

Background:Pain following ear-nose and throat surgery is one of the most important complaints for which, several drugs are used. This prospective, randomized, double-blind controlled trial was designed to compare the analgesic effect of tramadol versus lornoxicam for post-operative pain relief in patients undergoing ENT surgical procedures.Methods:One hundred and twenty patients of ASA class I-II, who had undergone elective ENT surgical procedures under general anesthesia, were assigned in a randomized manner into three equal groups. Group L received lornoxicam8 mg IV, Group T received tramadol 1 mg/kg IV and Group C received IV saline after induction of anesthesia before the start of the surgery. Post-operative pain was assessed using the visual analogue scale (VAS) and sedation level was evaluated during stay in the post-anesthesia care unit with a four-point sedation scale. Intraoperative blood loss was estimated using the Five-Point Scale. Adverse events in the first 24 h post-operative were recorded.Results:The VAS pain scores were significantly higher in Group C as compared with those in Groups L and T at 30 min and 1, 2, 4and 6 h post-operatively, with no significant difference between Group L and Group T. The amount of morphine consumption post-operatively was significantly lower in Group L (5.2 ± 2.5 mg) and Group T (5.0 ± 2.0 mg) as compared with that in Group C (7.4 ± 2.3 mg) (P = 0.001). The time for the first analgesic requirement was significantly less in Group L (92.62 ± 24.23 min) and Group T (88 ± 21.43 min) as compared with that in Group C (42.82 ± 25.61 min), with no significant difference between the other two groups. Estimated intraoperative blood loss score by the surgeons showed no significant difference between the three groups. The most frequent side-effects in the three groups were nausea and vomiting, and their incidence was significantly higher in the placebo group as compared with the other two groups.Conclusion:Tramadol 1 mg/kg was comparable to lornoxicam 8 mg for post-operative pain relief in patients undergoing ENT surgical procedures; both drugs helped to reduce the post-operative opioid requirement and consequently minimized the related adverse effects of the opioids.