New-typed coaxial nanobelts with magnetism and tunable fluorescent color bifunctionality have been successfully fabricated by electrospinning technology using a specially designed coaxial-spinneret. The synthesized coaxial nanobelts are composed of CoFe 2 O 4 /polymethyl methacrylate (PMMA) as the magnetic core and [Tb(BA) 3 (phen) ? Eu(BA) 3 (phen)]/PMMA (BA = benzoic acid, phen = 1,10-phenanthroline) as the photoluminescent shell. The morphology and properties of the final products have been investigated in detail by X-ray diffractometry, scanning electron microscopy, biological microscopy, vibrating sample magnetometry and fluorescence spectroscopy. The emitting color of the coaxial nanobelts can be tuned by adjusting the mass ratios of Tb(BA) 3 (phen) and Eu(BA) 3 (phen) in a wide color range from red to yellow to green under the excitation of 274-nm single-wavelength ultraviolet light. The luminescent intensity and magnetic property of the coaxial nanobelts can also be tuned. Furthermore, the coaxial nanobelts provide higher luminescent performance than CoFe 2 O 4 /[Tb(BA) 3 (phen) ? Eu(BA) 3 (phen)]/PMMA composite nanobelts. This new type of magnetic and color-tunable bifunctional coaxial nanobelt has the potential to be applied in novel nano-biolabel materials, drug delivery materials, and future nanodevices owing to their excellent magnetic-fluorescent properties, flexibility, and insolubility.

This study aimed to explore the feasibility of Phase I percutaneous spinal endoscopy with a 270° single incision in the ventral and dorsal dura mater for decompression treatment of thoracic spinal stenosis (TSS). Phase I percutaneous spinal endoscopy with a two-path (posterior and posterolateral approaches) single incision with a 270° decompression was performed in four cases of TSS with compression in the ventral and dorsal dura mater. The affected intervertebral space was located during the surgery, and the ossified ligamentum flavum in the ventral and dorsal dura mater was removed via laminectomy, which formed a decompression space in the thoracic cord. Next, posterolateral transforaminal expansion and plasty were performed to remove the ventral intervertebral disk. The visual analogue scale (VAS) score, thoracic spinal cord function score of the Japanese Orthopaedic Association (JOA) (11-point method), and Oswestry Disability Index (ODI) scores were used to evaluate the clinical efficacy. No dura mater or thoracic nerve injury occurred during the surgery. The symptoms of weakness in the lower extremities improved after the surgery. The postoperative magnetic resonance imaging and computed tomography examinations showed compression removal and dura mater bulging. The postoperative VAS, JOA, and ODI scores improved compared with the preoperative scores. Two surgical trajectories, posterior and posterolateral approaches, were established by a single incision using thoracic spinal canal decompression with Phase I 270° single-incision percutaneous spinal endoscopy. The posterior approach was performed mainly by translaminar unilateral fenestration and bilateral decompression in the ventral and dorsal dura mater, whereas the posterolateral approach was performed by decompression in the ventral dura mater to the midline of the vertebrae. This surgical method could be applied as a safe and feasible minimally invasive treatment for TSS with compression on both the ventral and dorsal dura mater.

Objectives: To explore feasibility and short-term efficacy of suturing the annulus after discectomy for lumbar disc herniation. Methods:229 cases operated with mono-segment discectomy were analyzed from June 2021 to December 2021,among them,133 cases operated with fenestration discectomy combined suturing the annulus and 96 cases operated with fenestration discectomy.The length of surgical incision,the operating time,blood loss,the average temperature for three days after surgery,duration of hospitalization after operation,preoperative and postoperative JOA score,visual analogue scale, MRI and DTI images were compared. Results: No significant difference was found between the two groups in the length of surgical incision,the operating time,blood loss,the average temperature for three days after surgery,duration ofhospitalization after operation.But significant differences could be observed in postoperative JOA score,VAS score,the same with preoperative and postoperative score in the same group,get a good rate of improvement surgery.Postoperative DTI images of sutured group is better than the control group. Conclusion: The symptoms of the lumbardisc herniation can be reliefed effectively by both methods,no significant difference could be found between them in the operating time,blood loss,etc.But after suturing,the ruptured annulus can instantly get the mechanical integrity,so that the nucleus is not easy to prolapse through the damaged annulus,and can reduce the rate of recurrent lumbar disc herniation. Furthermore,the function and stability of the spine in sutured patients can be reserved,owing to the more healthy nucleus pulposus has been kept.But the long-term efficacy of suturing the annulus still needs further follow-up.

Background Transcorporeal percutaneous endoscopic cervical discectomy (TcPECD) destroys the integrity of the vertebral body. We herein discuss its long-term risks and avoidance measures. Case presentation: A 44-year-old woman underwent TcPECD. Although her upper limb symptoms were relieved after the operation, the bone channel did not heal and the endplate of the segment was altered. She consequently developed chronic neck and shoulder discomfort. Conclusion Careful preoperative planning is needed to avoid non-healing of the bone channel following TcPECD. The diameter of the bony channel should be as small as possible and the channel should be opened at the posterior edge of the upper endplate to avoid collapse.