A Prospective Randomized Comparison of Patient Specific Instruments with Standard TKA Instrumentation

Introduction: Patient specific instruments (PSI), an alternative to standard total knee arthroplasty (TKA) technology, have shown mixed results regarding effectiveness in previous studies. This study evaluated the accuracy of the predicted PSI plan, compared incremental cost savings with PSI, and compared outcomes of PSI and standard TKA patients. Patients and Methods: This randomized, prospective feasibility study included 19 primary TKA patients receiving a cruciate-retaining cemented prosthesis from a single surgeon (DCA). 9 patients randomized to PSI received a pre-operative knee MRI for PSI fabrication using proprietary software.10 standard TKAs were completed. Operative data collected included operating times, implant details, femoral (medial/lateral distal and posterior) and tibial (medial/lateral) resections, and instrument trays used. Hospitalization data collected included length of stay, blood loss, drain output, and transfusions. SF-36 and WOMAC scores, routine radiographic analysis, and femoral-tibial angles were collected pre- and post-operatively. Costs of operating room use and anesthesia, implants, and hospitalization were collected. Statistical analyses included t-tests and chi-square tests. Results: All implant sizes matched surgical team adjusted PSI software plans. Flexion gap resection (posterior medial/lateral femur) was extremely accurate (averagemm). Sagittal plane tibial component posterior slope was larger in PSI TKA (mean 7.3 degrees) than standard instrumentation (mean 4.2 degrees) (p0.05). There were no differences in operating room times or hospitalization data, and there were no significant differences in functional outcomes between the two groups (p\u3e0.05). PSI patients used 4 fewer instrument trays per case (p\u3c0.0001). Conclusion: PSI TKA demonstrated outstanding accuracy in bone resection when compared with the pre-operative plan, and resulted in appropriate limb and component alignment with primary TKA. The number of instrument trays used in PSI TKA was significantly less than standard TKA, which led to less cost for instrument sterilization and assembly

Taking Flight – November 2019

Message from the Dean Alumni Spotlight -- Meghan Campbell Murray Former CEO of LexisNexis Presents Parker Talks Parker Business Scholar Looks to Give Back to Those with Disabilities Winning Team of GS-IANA Logistics Applied Research Challenge Announced Parker Business Scholars Get Inside Look at The Parker Companies Students Compete at The Collegiate World Cup of Sales in Orlando Beta Alpha Psi Award Finance and Economics Student Orgs Team Up to Host Merrill Lynch Finance Association Welcomes Wells Fargo to Campu

Easterner, Vol. 30, No. 9, November 16, 1978

This issue includes articles about a mix up on the agenda of the Associated Students legislature, the results of the student elections, new resignations on the Student Activities Review Board, a program where Beta Alpha Psi an honors society for accountants audit the books of a local United Way chapter, an increase in parking tickets, performing arts rehearsals, a study abroad program in Morelia, Mexico, the cross country team victory at the district NAIA championships in Walla Walla, and the football team\u27s loss in the Evergreen Conference Championship.https://dc.ewu.edu/student_newspapers/1464/thumbnail.jp

Frio pilot in CO2 sequestration in brine-bearing sandstones: The University of Texas at Austin, Bureau of Economic Geology, report to the Texas Commission on Environmental Quality to accompany a class V application for an experimental technology pilot injection well.

GEOSEQ project (LBNL, LLNL, ORNL), NETL, Schlumberger–Doll Research Center, Transpetco, Sandia TechnologiesJackson School of Geoscience

A Study of Medical Negligence Claiming in Scotland

Published version made available in accordance with the Publisher's Policy. © Crown copyright 2012 You may re-use this information (not including logos) free of charge in any format or medium, under the terms of the Open Government Licence. To view this licence, visit http://www.nationalarchives.gov.uk/doc/open-government-licence/ or write to the Information Policy Team, The National Archives, Kew, London TW9 4DU, or e-mail: [email protected]