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RISS 인기검색어
- 검색키워드
- 저자 : David M. Keller (검색결과 3 건)
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A CLIMATOLOGY OF LARGE-SCALE NORTH PACIFIC CYCLONES AND THEIR PREDICTABILITY
David D. Houghton,Linda M. Keller,Michael C. Morgan 한국기상학회 2004 한국기상학회 학술대회 논문집 Vol.2004 No.-
Twenty-five years of reanalyzed observed 500 mb height and surface pressure data over the Northern Hemisphere were examined to investigate the flow sequences related to persistent largeamplitude 500mb trough patterns over the North Pacific. Time sequences for composites for such events were analyzed to determine the evolution and vertical structure for the onset and dissipation of these trough patterns and the associated anomaly fields elsewhere in the Northern Hemisphere. Precursors for onsets of these events were determined by adjoint-derived forecast sensitivity analysis. Global connections were identified for these North Pacific trough patterns and the primary precursors 36 hours before the onset of the anomaly were found to be upstream in the middle latitude jet flow.
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Filippo Romanelli,Eric Boe,Li Sun,David M. Keller,Richard S. Yoon,Frank A. Liporace 대한고관절학회 2020 Hip and Pelvis Vol.32 No.4
Displaced pelvic ring injuries can be challenging to even the experienced orthopedic traumatologist. A temporary external fixation to table construct provides a quick, simple, and accessible means of external skeletal fixation to reliably obtain and maintain stable hemipelvis reduction on the operating room table. The contralateral hemipelvis can be stabilized to the table by use of Steinman pins safely inserted into the subtrochanteric and anterior column regions and later connected to external fixator bars attached to the table. With rigid stabilization, the displaced contralateral pelvic fragment(s) can be reduced in a more vector intentional manner with greater force than the traditional means of pelvic reduction can allow. The skeletal-table fixation technique is presented along with two cases, a combined pelvic-acetabular injury and an isolated pelvic ring injury.
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Richard A. Pizzo,Jay N. Patel,Anthony Viola,David M. Keller,Richard S. Yoon,Frank A. Liporace 대한고관절학회 2020 Hip and Pelvis Vol.32 No.4
Purpose: Infection following total hip arthroplasty is a challenging and devastating complication. In two-stage revision arthroplasty, antibiotic spacers, although efficacious, can be associated with an unacceptable rate of mechanical complications (e.g., fracture, dislocation). This series describes 15 patients with infected total hip prostheses treated with hybrid cement-screw fixation constrained liner antibiotic spacers to enhance stability and minimize mechanical complications. Materials and Methods: All patients with an infected hip prosthesis undergoing two-stage revision arthroplasty at a single academic medical center were identified and screened for inclusion. Clinical and radiographic data including patient demographics and outcome measures were collected and retrospectively analyzed. Results: Two patients died of unrelated causes at an average of 6-week postoperatively. Infections in the remaining thirteen patients (100%) were successfully eradicated; all underwent uncomplicated revision arthroplasty at a mean duration of 99.5 days after the placement of the antibiotic spacer. No dislocations, fractures, or other mechanical failures of any spacer were observed in this series. Conclusion: The hybrid cement-screw fixation technique for constrained liner antibiotic spacers is a reliable and effective treatment method for eradicating prosthetic joint infections without mechanical complications.
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