BACKGROUND: Medial posterior horn meniscal tear is difficult to be visualized in full view during arthroscopy and is occasionally undetected when the superior surface seems intact. OBJECTIVE: The purpose of this study is to describe a characteristic arthroscopic sign indicating the occult partial-thickness longitudinal medial meniscus tear extending only to the inferior articular surface. METHODS: This study was a retrospective analysis of available arthroscopic knee surgery between January 2016 and December 2017. The videos were studied and data was recorded for the number of cases showing the presence of 'eyelid-turnup' sign and coexisting partial-thickness medial meniscus tear. Sensitivity and positive predictive value of the sign were calculated. RESULTS: Of all the 491 videos of medial meniscal tear available for review, partial-thickness longitudinal medial meniscus was torn in 26 cases. Six out of 26 patients could be diagnosed with partial-thickness longitudinal tear under direct vision. Of the other 20 patients which could not be diagnosed under direct vision during arthroscopy until the tear was pressed by a probe, 17 patients were diagnosed by the positive 'eyelid-turnup' sign. The other 3 patients showed negative 'eyelid-turnup' sign and were then diagnosed by the hints of preoperative MRI and intra-operative exploration. The sensitivity of the sign was 85%; the positive predictive value was 89.5%. CONCLUSIONS: The 'eyelid-turnup' sign of meniscus pressed by a probe at arthroscopy is a characteristic indicator for occult inferior partial-thickness longitudinal tears of midbody and posterior horn. Early identification of this special sign may help reduce the likelihood that the occult partial-thickness longitudinal tear will be missed during arthroscopy.

前交叉韧带解剖重建要求尽可能接近原始前交叉韧带的解剖形态.形态学研究表明前交叉韧带为扁平带状结构.目前发现非圆形(椭圆形或矩形)骨道技术更能满足前交叉韧带为扁平带状结构解剖重建的要求.关于膝前交叉韧带非圆形骨道重建技术的研究逐渐增多.本文就非圆形骨道重建技术研究进展进行综述.

OBJECTIVE:To explore function and related molecular mechanism of osteopractic total flavone (OTF) on tendon healing in rats.METHODS:Ten male rats aged for 8 weeks were collected and weighted from 180 to 220 g. Tendon stem cells were cultivated, the third tendon stem cells were used for experiment. OTP treated with 0, 0.1, 1, 10 ng/ml were added into tendon stem cells, and expression change of ALP, Runx2, OCN, VEGF, P-S6, P-4E/BP1 were detected after 14 days. Forty male rats aged for 8 weeks (weighted 180 to 220 g) were established extra-articular tendon-bone transplanting healing model, and divided into experimental group and control group. Experimental group were treated with OTF(100 mg·kg⁻¹·d⁻¹), while control group was treated by normal saline with the same volume. Tendon-bone healing degree were detected by biomechanical testing at 3 and 6 weeks after surgery, histological detection were applied to detect tendon-bone healing and number of new vessles.RESULTS:After treated by OTP, ALP staining and active index detection showed there were statistical differences among 0, 0.1, 1, 10 ng/ml group. After 14 days' cultivation, western blotting results showed mTOR downstream marker protein P-S6 protein expression were gradually increased with increase of density of OTP, expression of P-4E/BP1 was reduced, while expression of Runx2, OCN, VEGF were increased. Biological detection results showed that there was no significant difference in mechanical strength between experimental group(0.78±0.05) N/mm and control group (0.51±0.02) N/mm at 3 weeks after surgery, while mechanical strength in experimental group (1.36±0.09) N/mm was higher than control group (1.01±0.08) N/mm at 6 weeks after surgery. Histological results showed maturity of tendon-bone surface cell were higher at 3 and 6 weeks in experimental group, sharpey fiber growth more density, calcification extent of mesenchyme was high, and new bone, vessels were increased.CONCLUSIONS:OTF could promote osteogenic differentiation of tendon stem cells through mTOR signaling in vitro, and stimulate tendon-bone healing in bone tunnel and enhance connection quality between tendon and bone.

目的:探讨应用PSBH方法开展大学生营养教育及对不合理生活方式进行早期干预的作用.方法:应用"解决问题、促进健康"方法,通过举办营养教育讲座、发放营养知识和健康生活方式宣传手册、并采用KAP调查问卷对汕头大学200名不同专业本科学生进行营养教育干预前、后调查.结果:营养教育干预前,大学生的营养知识相对缺乏,部分营养知识的答题正确率不到50％.部分大学生存在一些不正确的饮食行为.实施PSBH项目后,大学生营养知识显著提高(P<0.05),营养态度明显改善(P<0.01)、不合理饮食行为也明显改变.结论:通过PSBH项目,对在校大学生的生活方式进行干预,可提升在校大学生对营养知识的了解,促进良好营养态度的形成,纠正不合理的饮食行为和生活习惯,对预防常见慢性病有积极意义.

The treatment of gluteal muscle contracture (GMC) after failed primary open release surgery has rarely been reported in the literature. GMC is a troublesome health problem in some developing countries, and it can result in the limitation of patients’ hip function, leading to the development of inferiority complexes. The aim of this study is to evaluate the effect of arthroscopic revision surgery after failed primary open release on patients with GMC.