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The novel CT image-based PO classification system has good intra-observer reliability. The incidence of PO after Bryan cervical disk replacement is relative high, and the high-grade PO is mainly distributed at the uncovertebral joint. The high-grade PO will affect the ROM after surgery; however, it does not affect the neurologic symptoms.

Background:Root avulsion to all 5 roots of the brachial plexus is a common presentation and keeps a major reconstructive challenge. The contralateral C7 (CC7) nerve transfer has been used in treating brachial plexus avulsion injury (BPAI) since 1986. However, the effectiveness of the procedure remains a subject of controversy. The aim of this meta-analysis was to study surgical outcomes regarding motor and sensory recovery after CC7 nerve transfer.Methods:Chinese or English (i.e., “contralateral c-7”, “contralateral c7”, “c7 nerve root”, and “seventh cervical nerve root”) keywords were used for a literature search for articles related to CC7 nerve transfer in several databases (i.e., PubMed, Cochrane, Embase, CNKI, CQVIP, and Wanfang Data). Clinical research articles were screened, and animal studies as well as duplicate publications were excluded. Muscle strength and sensory recovery were considered to be effective only when the scores on the United Kingdom Medical Research Council scale were equal to or higher than M3 and S3, respectively.Results:The overall ipsilateral recipient nerve recovery rates were as follows: the efficiency rate for muscle strength recovery after CC7 nerve transfer was 0.57 (95% confidence interval [CI]: 0.48–0.66) and for sensory recovery was 0.52 (95% CI: 0.46–0.58). When the recipient nerve was the median nerve, the efficiency rate for muscle strength recovery was 0.50 (95% CI: 0.39–0.61) and for sensory was 0.56 (95% CI: 0.50–0.63). When the recipient nerve was the musculocutaneous nerve and the radial nerve, the efficiency rate for muscle strength recovery was 0.74 (95% CI: 0.65–0.82) and 0.50 (95% CI: 0.31–0.70), respectively.Conclusions:Transfer of CC7 nerves to musculocutaneous nerves leads to the best results. CC7 is a reliable donor nerve, which can be safely used for upper limb function reconstruction, especially for entirely BPAI. When modifying procedures, musculocutaneous nerves and median nerve can be combined as recipient nerves.

Innovation and sustainable development are important concerns for countries around the world, and strengthening environmental regulation (ER) may have a critical implication for the promotion of green technology innovation. On the basis of elaborating the mechanism of ER on technological innovation, the Super‐SBM‐Windows‐DEA model is employed to measure the green innovation efficiency (GIE) using provincial‐level panel data from 2004–2017 in China. The system generalised method of moments is used to estimate the direct effects of ER on GIE, an innovative mediating effect model that based on structural equation model is utilised to explore their indirect effects. Further, a spatial econometric model is developed to examine the possible spatial effects between ER and GIE. The ‘U’ shaped relationship between ER and GIE is verified in the direct effect test. The results of the indirect effects indicate that ER is not conducive to GIE by discouraging the inflows and outflows of FDI, while it contributes to GIE by promoting the structural upgrading of industry. The spatial effect results show that the impact of ER on GIE in neighbouring areas has an obvious spatial spillover characteristic, which is manifested as an inverted ‘U’‐shaped relationship of promotion followed by inhibition. The paper further proposes policy implications including strengthening cross‐regional joint prevention and control, integrating ER strategies, and rational application of ER tools, so as to promote a win‐win development of innovation and sustainability, and the positive effects of ER are better developed.

Global environmental issues are becoming increasingly prominent, and green finance may play a key role in achieving sustainable development. This study takes the “Green Financial Reform and Innovation Pilot Zone” policy as a quasi‐natural experiment. The Difference‐in‐Difference model and Propensity Score Matching‐Difference in Difference model are applied to examine the direct effect of green finance policy on the green development of enterprises. A mechanism test model is used to investigate its indirect transmission mechanism. Then several heterogeneity analyses are performed from five perspectives. The results show that green finance policy considerably promotes enterprise green development and the conclusion is supported by a series of robustness tests. The mechanism analyses show that financing constraints and green innovation are the two transmission channels for green finance policy affecting enterprise green development. The heterogeneity analyses indicate that the policy effect is more significant among enterprises those are non‐state‐owned, have managers with a financial background, operate in regions with high marketization, belong to industries with low monopoly, and locate in poilt zones of Zhejiang, Guangdong, and Guizhou. Based on the above findings, policy suggestions are made to establish a win‐win scenario for the economy and the environment.

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