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Yan RZ, Chen C, Lin CR, Wei YH, Guo ZJ, Li YK, Zhang Q, Shen HY, Sun HL. Delayed neurological dysfunction following posterior laminectomy with lateral mass screw fixation: A case report and review of literature. World J Clin Cases 2024; 12:1356-1364. [PMID: 38524505 PMCID: PMC10955538 DOI: 10.12998/wjcc.v12.i7.1356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 12/27/2023] [Accepted: 02/02/2024] [Indexed: 02/29/2024] Open
Abstract
BACKGROUND While most complications of cervical surgery are reversible, some, such as symptomatic postoperative spinal epidural hematoma (SEH), which generally occurs within 24 h, are associated with increased morbidity and mortality. Delayed neurological dysfunction is diagnosed in cases when symptoms present > 3 d postoperatively. Owing to its rarity, the risk factors for delayed neurological dysfunction are unclear. Consequently, this condition can result in irreversible neurological deficits and serious consequences. In this paper, we present a case of postoperative SEH that developed three days after hematoma evacuation. CASE SUMMARY A 68-year-old man with an American Spinal Injury Association (ASIA) grade C injury was admitted to our hospital with neck pain and tetraplegia following a fall. The C3-C7 posterior laminectomy and the lateral mass screw fixation surgery were performed on the tenth day. Postoperatively, the patient showed no changes in muscle strength or ASIA grade. The patient experienced neck pain and subcutaneous swelling on the third day postoperatively, his muscle strength decreased, and his ASIA score was grade A. Magnetic resonance imaging showed hypointense signals on T1 weighted image (T1WI) and T2WI located behind the epidural space, with spinal cord compression. Emergency surgical intervention for the hematoma was performed 12 h after onset. Although hypoproteinemia and pleural effusion did not improve in the perioperative period, the patient recovered to ASIA grade C on day 30 after surgery, and was transferred to a functional rehabilitation exercise unit. CONCLUSION This case shows that amelioration of low blood albumin and pleural effusion is an important aspect of the perioperative management of cervical surgery. Surgery to relieve the pressure on the spinal cord should be performed as soon as possible to decrease neurological disabilities.
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Affiliation(s)
- Rui-Zhong Yan
- Department of Orthopedics, Taiyuan Central Hospital, Taiyuan 030009, Shanxi Province, China
| | - Chao Chen
- Department of Orthopedics, Taiyuan Central Hospital, Taiyuan 030009, Shanxi Province, China
| | - Chu-Ran Lin
- Department of Orthopedics, Graduate School Shanxi University of Traditional Chinese Medicine, Taiyuan 030024, Shanxi Province, China
| | - Yan-Hui Wei
- Department of Orthopedics, Taiyuan Central Hospital, Taiyuan 030009, Shanxi Province, China
| | - Zhi-Jian Guo
- Department of Orthopedics, Taiyuan Central Hospital, Taiyuan 030009, Shanxi Province, China
| | - Ya-Kun Li
- Department of Orthopedics, Taiyuan Central Hospital, Taiyuan 030009, Shanxi Province, China
| | - Quan Zhang
- Department of Orthopedics, Taiyuan Central Hospital, Taiyuan 030009, Shanxi Province, China
| | - He-Yi Shen
- Department of Orthopedics, Taiyuan Central Hospital, Taiyuan 030009, Shanxi Province, China
| | - Hao-Lin Sun
- Department of Orthopedics, Peking University First Hospital, Beijing 100034, China
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Wang H, Zhao BJ, Yan RZ, Wang C, Luo CC, Hu M. [Evaluation of biocompatibility of Ti-6Al-4V scaffolds fabricated by electron beam melting]. Zhonghua Kou Qiang Yi Xue Za Zhi 2018; 51:667-672. [PMID: 27806759 DOI: 10.3760/cma.j.issn.1002-0098.2016.11.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the biocompatibility of Ti-6Al-4V scaffolds fabricated by electron beam melting(EBM). Methods: Bone marrow mesenchymal stem cells(BMSC) co-cultured with Ti-6Al-4V specimens fabricated with EBM was prepared as experimental group and the regular cells culture was employed as control. The biocompatibility was detected using CCK-8 and cytoskeleton staining. The osteogenic differentiation ability was assessed using mineralization nodule formation. A 24 mm defect was created on the right mandibular body in 12 beagles. The mandibular defects were repaired with Ti-6Al-4V scaffolds mesh fabricated by EBM. General observation, CT and histology examination was carried out to evaluated the biocompatibility of Ti-6Al-4V scaffolds in vivo. Results: CCK-8 result showed the A values of the two groups had no significant difference(P >0.05). There was no significant difference between the two groups (P>0.05). Cytoskeletal staining showed that cells were fully stretched out and grew well on T-i6Al-4V specimen. The actin fibers were arranged in parallel and stained uniformly with fluorescent. After osteogenic culture, the quantity of the nodule formation of the experimental group and control group were 5.7±0.7 and 5.1 ± 0.6, respectively(P>0.05). All animals had tolerated the surgery and healed well. CT examination showed that Ti-6Al-4V scaffolds mesh had good retention with surrounding bone and the continuity of mandible was restored. Histological examination showed that no inflammation reaction or toxity was caused in the soft tissue surrounding the scaffolds and in the liver and kidney after implantation. Ti-6Al-4V scaffolds had good retention with surrounding bone. Conclusions: Ti-6Al-4V fabricated with electron beam melting has good biocompatibility.
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Affiliation(s)
- H Wang
- Department of Oral and Maxillofacial Surgery, General Hospital of Chinese PLA, Beijing 100853, China
| | - B J Zhao
- Department of Oral and Maxillofacial Surgery, General Hospital of Chinese PLA, Beijing 100853, China
| | - R Z Yan
- Department of Stomatology, Hospital of Jiangxi Provincial Armed Police Corps, Nanchang 330001, China
| | - C Wang
- Department of Oral and Maxillofacial Surgery, General Hospital of Chinese PLA, Beijing 100853, China
| | - C C Luo
- Department of Radiology, General Hospital of Chinese PLA, Beijing 100853, China
| | - M Hu
- Department of Oral and Maxillofacial Surgery, General Hospital of Chinese PLA, Beijing 100853, China
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Zhao BJ, Wang H, Yan RZ, Wang C, Li RX, Hu M. [Comparison of surface characteristics and cytocompatibility of Ti-6Al-4V alloy fabricated with select laser melting and electron beam melting]. Zhonghua Kou Qiang Yi Xue Za Zhi 2016; 51:753-757. [PMID: 27978917 DOI: 10.3760/cma.j.issn.1002-0098.2016.12.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the surface characteristics and cytocompatibility of Ti-6Al-4V alloy fabricated using select laser melting (SLM) and electron beam melting (EBM) technique. Methods: Ti-6Al-4V alloy specimens were fabricated with SLM and EBM. A wrought form of Ti-6Al-4V alloy was used as a control. Its properties were evaluated using component analysis, contact angle test, surface roughness, surface topography, cell ultrastructure, cell attachment and proliferation observation, metal ion precipitation examination. Results: The roughness of SLM and EBM specimens was suitable for cell attachment but not the best. The character of SLM and EBM specimens was hydrophobic (>65°). The surface topography of EBM and SLM specimens were similar, but were not the best type for cell attachment. The components of Ti-alloy oxide film were detected in all the specimens. The content of Ti, Al, V ions of EBM, SLM and wrought specimens were very low and did not affect the cell attachment and proliferation. The ultrastructure of cell was normal, and the cytomembrane was intact. The number of cells was similar to each other among the three kinds of specimens and increased obviously with the culture time. Conclusions: The results of the study suggested that EBM and SLM Ti-6Al-4V specimens possessed good surface characteristics. However, the surface modification are needed further.
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Affiliation(s)
- B J Zhao
- Department of Oral and Maxillofacial Surgery, General Hospital of Chinese PLA, Beijing 100853, China
| | - H Wang
- Department of Oral and Maxillofacial Surgery, General Hospital of Chinese PLA, Beijing 100853, China
| | - R Z Yan
- Department of Stomatology, Hospital of Jiangxi Provincial Armed Police Corps, Nanchang 330001, China
| | - C Wang
- Department of Oral and Maxillofacial Surgery, General Hospital of Chinese PLA, Beijing 100853, China
| | - R X Li
- Department of Oral and Maxillofacial Surgery, General Hospital of Chinese PLA, Beijing 100853, China
| | - M Hu
- Department of Oral and Maxillofacial Surgery, General Hospital of Chinese PLA, Beijing 100853, China
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Yan RZ, Li YF, Wang C, Li RX, Liu ZW, Hu M. [A preliminary study on the mechanical characteristics of the titanium scaffolds with three-dimensional mesh structure fabricated by electron beam melting]. Zhonghua Kou Qiang Yi Xue Za Zhi 2016; 51:656-660. [PMID: 27806757 DOI: 10.3760/cma.j.issn.1002-0098.2016.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To examine the biomechanical properties of three-dimensional(3D) printed electron beam melting(EBM) Ti-6Al-4V mesh as scaffold for mandibular repairment. Methods: We fabricated Ti-6Al-4V samples of different structures with strut, sheet and 3D mesh scaffolds(a controllable diameter 0.35, 0.50, 0.70 mm, distribution density: intensive sparse) by EBM process. The mechanical properties of these structures were examined by X-ray energy dispersive spectrum(EDS), uniaxial tensile test, three-point bending test, under compression load and compared with their different microstructure and mechanical properties. Results: Compressive deformation behavior of these cellular structures exhibited brittle character that had a typical irregular plateau region in the stress-strain curves. The mesh of larger diameter(d=0.70 mm) showed higher specific strength than the meshs of small diameter(d=0.35 mm) did, and the other 3D mesh under the same condition showed identical specific stiffness. Conclusions: EBM was successfully used to fabricate novel 3D mesh Ti-6Al-4V structures for applications. By optimizing the buckling and bending deformation, Ti-6Al-4V cellular solids with high strength, low modulus. Furthermore, the results of mechanical property and chemistry composition showed that the scaffold could completely satisfy the requirement of hard tissue repairment.
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Affiliation(s)
- R Z Yan
- Department of Oral and Maxillofacial Surgery, General Hospital of Chinese PLA, Beijing 100853, China [Present address: Department of Stomatology, Hospital of Jiangxi Provincial Armed Police Corps, Nanchang 330001, China]
| | - Y F Li
- Department of Stomatology, Chinese PLA 532 Hospital, Huangshan Anhui 245041, China
| | - C Wang
- Department of Oral and Maxillofacial Surgery, General Hospital of Chinese PLA, Beijing 100853, China [Present address: Department of Stomatology, Hospital of Jiangxi Provincial Armed Police Corps, Nanchang 330001, China]
| | - R X Li
- Department of Oral and Maxillofacial Surgery, General Hospital of Chinese PLA, Beijing 100853, China [Present address: Department of Stomatology, Hospital of Jiangxi Provincial Armed Police Corps, Nanchang 330001, China]
| | - Z W Liu
- School of Energy and Power Engineering, Beihang University, Beijing 100191, China
| | - M Hu
- Department of Oral and Maxillofacial Surgery, General Hospital of Chinese PLA, Beijing 100853, China [Present address: Department of Stomatology, Hospital of Jiangxi Provincial Armed Police Corps, Nanchang 330001, China]
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Zhan P, Yan RZ, Liu XY, Pannecouque C, Witvrouw M, De Clercq E, Molina MT, Vega S. Synthesis and anti-HIV activity of novel 2,4-disubstituted-7-methyl-1,1,3-trioxo-2H,4H-pyrazolo[4,5-e][1,2,4]thiadiazine derivatives. Drug Discov Ther 2011; 5:279-85. [PMID: 22466438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A series of novel 2,4-disubstituted-7-methyl-1,1,3-trioxo-2H,4H-pyrazolo[4,5-e][1,2,4]thiadiazines (PTDs) was prepared starting from a ring of pyrazolo[4,5-e][1,2,4]thiadiazine nuclei with two different alkyl halides obtained by a facile one-pot reaction. The structures of all synthesized compounds were confirmed by 1H- and 13C-NMR, infrared spectra (IR), and mass spectra (MS) spectroscopic analysis. Anti-HIV activity was evaluated and none of the compounds were found to inhibit HIV replication in human T-lymphocyte (MT-4) cell culture.
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Affiliation(s)
- P Zhan
- Institute of Medicinal Chemistry, School of Pharmaceutical Sciences, Shandong University, Ji'nan, China
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