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Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_15 | Pages 178 - 178
1 Mar 2013
Funayama A Okubo M Shimizu H Kawasakiya S Fujie A Toyama Y
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Introduction

The goal of total hip arthroplasty (THA) should be to reconstruct the acetabulum by positioning the hip center as close as possible to the anatomical hip center. However, the true position of the anatomic hip center can be difficult to determine during surgery on an individual basis. In 2005, we designed, produced an acetabular reaming guide, and clinically used to enable cup placement in the ideal anatomical position. This study was examined the accuracy the reaming guide for THA in prospective study.

Methods

This guide was applied consecutive 230 patients in primary THA. During planning, the distance from the acetabular edge to the reaming center and from the center to the perpendicular of the inter-teardrop line was measured on an anteroposterior (AP) X-ray. The reaming guide was adjusted depend on the reaming center by based planning. Acetabular reaming was performed with the process reamer.


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_15 | Pages 215 - 215
1 Mar 2013
Kawasakiya S Funayama A Fujie A Shimizu H Toyama Y
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Purpose

The frequency of venous thrombo-embolism (VTE) after total hip arthroplasty(THA) is 20–30% and it is serious complication under THA. Therefore it is necessary to detect and prevent VTE. The purpose of this study were examined the frequency of VTE and the factor of incidence of VTE in our hospital.

Patients and methods

The 615 patients(82 men and 533 women) who performed primary THA from Jan. 2006 to Apr. 2011 were examined in this study. The Average age at the operation was 65 years (rage, 20–92 years). MDCT examination was performed the day after operation to detect VTE. 95 patients(15.4%) were positive of VTE and the rest of them were negative. We examined the age at operation, body mass index(BMI), blood loss, operative time, blood soluble fibrin monomer complex(SFMC) in the positive and negative group of VTE. The distance from the tibial joint line to the level of DVT was measured.


Orthopaedic Proceedings
Vol. 92-B, Issue SUPP_I | Pages 75 - 75
1 Mar 2010
Imatani J Shimamura Y Kondo H Shimizu H Takahashi K Hayashi M
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Purpose: The purpose of this study was to evaluate a new ONI Elbow Plate System for intra-articular fractures of the distal humerus in the elderly.

Methods: 10 elder patients with complete intra-articular distal humerus fractures were treated by our new fixation system. The mean age of our patients was 76 years old (range 70 to 88 years). According to the AO/ASIF system, 6 cases were type C1, three cases were C2 and one case was C3. The ONI transcondylar plate conforms to the anatomical contour of the lateral column of the distal humerus and a locking mechanism between the plate portion and the transcondylar screw and the ONI medial plate conforms to the anatomical contour of the medial one (ONI Elbow Plate System). In all cases the ONI transcondylar plate was used at the lateral side of the fracture site, and either a cannulated cancellous screw (n=3) or an AO one-third tubular plate (n=4) or the ONI medial plate (n=3) at the medial side. The mean period of follow up was 32 months (24 to 48 months).

Results: In all of the 10 cases, complete union was seen on radiographs, and alignment was almost maintained postoperatively. The assessment of results according to the modified Cassebaum’s rating score was 90.4. There were no cases of nonunion or malunion.

Conclusion: Our data showed that the ONI Elbow System for treatment of this fracture in the elderly produced consistently good results even in cases with a small osteoporotic fragment of the distal humerus