Each system has its benefits and shortcomings. Knowledge of the fundamental principles upon which these systems are based may aid the clinician to choose an appropriate treatment for patients. Having a common language for these systems may aid in comparative research. Vertical expandable titanium rib prosthesis is used with humanitarian exemption. The other devices mentioned in this manuscript are not approved for growing constructs by the Food and Drug Administration and are used off-label.
GP46 is an abundant glycoprotein of 46 kDa on the surface of the promastigote form of most Leishmania species. We show that the steady state level of GP46 mRNA increases >30-fold as Leishmania chagasi promastigotes develop in vitro from a less infectious form during logarithmic growth to a highly infectious form in the stationary phase of cultivation. Nuclear run-on experiments demonstrate that this increase in GP46 mRNA abundance is regulated post-transcriptionally. Plasmids containing the 3-untranslated regions (UTRs) and downstream intergenic regions (IRs) of two different GP46 genes fused immediately downstream of the -galactosidase coding region were transfected into L. chagasi, and -galactosidase activity and mRNA levels were examined. The presence of the 3-UTR ؉ IR of one GP46 gene (gp46A) resulted in a steady increase in -galactosidase activity and mRNA level as the transfected promastigotes developed from logarithmic to stationary phase. This differential effect parallels that of the 3-UTRs ؉ IRs of a family of genes for an unrelated Leishmania surface glycoprotein, GP63. Thus, post-transcriptional regulation of the genes for two different surface glycoproteins of Leishmania occurs via a similar mechanism.
Introduction: Posterior spinal fusion for idiopathic scoliosis is extremely painful, with no superior single analgesic modality. We introduced a methadone-based multimodal analgesia protocol, aiming to decrease the length of hospital stay (LOS), improve pain control, and decrease the need for additional opioids. Methods: We analyzed 122 idiopathic scoliosis patients with posterior instrumented spinal fusion. They were matched by age, sex, surgeon, and the number of levels fused before and after the implementation of the new protocol. This analysis included 61 controls (intrathecal morphine, gabapentin, intravenous opioids, and adjuncts) and 61 patients on the new protocol (scheduled methadone, methocarbamol, ketorolac/ibuprofen, acetaminophen, and oxycodone with intravenous opioids as needed). The primary outcome was LOS. Secondary outcomes included pain scores, total opioid use (morphine milligram equivalents), time to a first bowel movement, and postdischarge phone calls. Results: New protocol patients were discharged earlier (median LOS, 2 days) compared with control patients (3 days; P < 0.001). Total inpatient morphine consumption was lower in the protocol group ( P < 0.001). Pain scores were higher in the protocol group on the day of surgery, similar on postoperative day (POD) 1, and lower by POD 2 ( P = 0.01). The new protocol also reduced the median time to first bowel movement ( P < 0.001), and the number of postdischarge pain-related phone calls ( P < 0.006). Conclusion: Methadone-based multimodal analgesia resulted in significantly lower LOS compared with the conventional regimen. It also provided improved pain control, reduced total opioid consumption, and early bowel movement compared with the control group.
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