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Lee, Sungjun,Borys, Michael,Abbott, Patrick,Becerra, Luis Omar,Eltawil, Alaaeldin A,Jian, Wang,Malengo, Andrea,Medina, Nieves,Snegov, Victor,Wü,thrich, Christian,Scholz, Frank IOP 2017 Metrologia Vol.54 No.-
<P></P> <P>In order to show equivalence in mass standards calibration among National Metrology Institutes (NMIs) of member countries of the 'Comité international des poids et mesures' (CIPM), key comparisons (KC) of mass standards have been carried out under the auspices of the '<I>Comité Consultatif pour la Masse et les Grandeurs Apparentées</I>' (CCM). This key comparison of 5 kg, 100 g, 10 g, 5 g and 500 mg stainless steel mass standards was based on the decision of the CCM during the 12<SUP>th</SUP> meeting held in 2010 at the Bureau International des Poids et Mesures (BIPM). KRISS (Republic of Korea) and PTB (Germany) acted as pilot laboratory and co-pilot laboratory, respectively. The results were evaluated with the Monte Carlo method using measurement values based on participants' reference standards calculated following the recent BIPM amendments in 2015. Regarding participant results, VNIIM (100 g and 5 g) were not consistent with the key comparison reference values within their expanded uncertainties with the coverage factor, <I>k</I> = 2.</P> <P></P> <H2>Main text</H2> <P> To reach the main text of this paper, click on <A HREF='http://www.bipm.org/utils/common/pdf/final_reports/M/M-K7/CCM.M-K7.pdf'>Final Report</A>. Note that this text is that which appears in Appendix B of the BIPM key comparison database <A HREF='http://kcdb.bipm.org/'>kcdb.bipm.org/</A>.</P> <P>The final report has been peer-reviewed and approved for publication by the CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).</P>
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Maduri Rodolfo,Cossu Giulia,Aureli Viviana,Wüthrich Sonia Plaza,Bobinski Lukas,Duf John Michael 대한척추외과학회 2021 Asian Spine Journal Vol.15 No.5
Study Design: This was a retrospective review of patients with compressive cervical radiculopathy treated with a minimally invasive anterior cervical foraminotomy (ACF). Purpose: This study aimed to evaluate the results and complication rates of ACF in a consecutive series of patients and to report our clinical results of ACF as a minimally invasive technique in a series of 45 consecutive patients treated for compressive cervical radiculopathy. Overview of Literature: ACF is a motion-sparing procedure and an alternative to anterior cervical discectomy and fusion (ACDF) and posterior cervical foraminotomy for direct nerve root decompression in patients with compressive cervical radiculopathy. Methods: The chart review recorded clinical and radiological features preoperatively and postoperatively and at follow-up (FU). The effect of prognostic factors was analyzed in relation to the clinical outcome. Results: Between January 2004 and October 2019, 45 patients (15 females and 30 males) with a mean age of 55.9 years (range, 28–78 years) underwent ACF for unilateral cervical radiculopathy. The global clinical outcome according to the MacNab scale was evaluated as excellent in 64.5% of patients (n=29), good in 28.9% (n=13), fair in 4.4% (n=2), and poor in 2.2% (n=1). The radiological FU was available for 73.3% (n=33). The statistical analysis revealed no influence of age, sex, operated level, and side on the clinical outcome. Only one patient (2.2%) exhibited spontaneous bone fusion at the operated level on FU after a right-sided C6–7 ACF with no clinical consequences. No patient presented with signs of delayed segmental instability. The overall reoperation rate of this series was 4.4%. Conclusions: ACF is a feasible and low-cost alternative to ACDF in selected patients with cervical radiculopathy. The use of tubular retractors in ACF may confer an added advantage that creates a safe corridor for direct cervical root decompression yet minimizing surrounding soft tissue retraction and avoiding unnecessary bone removal.
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