Bio-mechanical evaluation of extreme lateral transforaminal lumbar interbody fusion / 中华外科杂志

<p><b>OBJECTIVE</b>To evaluate the feasibility and post-operation stability of extreme lateral transforaminal lumbar interbody fusion (E-TLIF) and other traditional surgical approach via bio-mechanical test.</p><p><b>METHODS</b>There were 24 normal lumbar spine segment of swine were divided into the following four groups: control group, standard group (internal fixed with pedicle screws only), transforaminal lumbar interbody fusion (TLIF) group and E-TLIF group. The specimen in anteflect, hypsokinesis, lateral flexion and rotate movements were tested respectively with bio-mechanical devices to study on the load-straining changes and biomechanics index.</p><p><b>RESULTS</b>After TLIF or E-TLIF, specimen turned out more steady than normal control group (t = 4.17 - 4.53, P < 0.01). Compared with TLIF group [linear displacement (3.98 ± 0.22) mm, angular displacement 3.03° ± 0.18°], specimen after E-TLIF [linear displacement (3.40 ± 0.09) mm, angular displacement 2.57° ± 0.12°] were more stable in biomechanics index on lateral flection movement (t = 2.61, P < 0.05), but no difference on axial or rotational movements (P > 0.05).</p><p><b>CONCLUSION</b>E-TLIF is a safe and more efficient operation approach.</p>

Scanning aneugen and clastogen by micronuclei analysis using flow cytometry / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To explore a flow cytometry (FCM)-based method for discriminating aneugen- or clastogen-induced micronuclei.</p><p><b>METHODS</b>Cells were stained with anti-CD71-FITC and PI, and the PI fluorescent signal intensity of micronucleated reticulocyte (MN-RET) in the peripheral blood of NIH mouse treated with COL or CP was detected by flow cytometry.</p><p><b>RESULTS</b>The ratio of the median of the intensity of MN-RET fluorescent signals to that of nucleated cell was low in the cyclophosphamide treated mouse, while the median was high in the colchicine treated mouse.</p><p><b>CONCLUSION</b>The flow cytometry-based micronucleus assay can be used to discriminate primarily smaller MN induced by the clastogen exposure from the larger MN induced by an aneugen.</p>