1.Chinese expert consensus on blood support mode and blood transfusion strategies for emergency treatment of severe trauma patients (version 2024)
Yao LU ; Yang LI ; Leiying ZHANG ; Hao TANG ; Huidan JING ; Yaoli WANG ; Xiangzhi JIA ; Li BA ; Maohong BIAN ; Dan CAI ; Hui CAI ; Xiaohong CAI ; Zhanshan ZHA ; Bingyu CHEN ; Daqing CHEN ; Feng CHEN ; Guoan CHEN ; Haiming CHEN ; Jing CHEN ; Min CHEN ; Qing CHEN ; Shu CHEN ; Xi CHEN ; Jinfeng CHENG ; Xiaoling CHU ; Hongwang CUI ; Xin CUI ; Zhen DA ; Ying DAI ; Surong DENG ; Weiqun DONG ; Weimin FAN ; Ke FENG ; Danhui FU ; Yongshui FU ; Qi FU ; Xuemei FU ; Jia GAN ; Xinyu GAN ; Wei GAO ; Huaizheng GONG ; Rong GUI ; Geng GUO ; Ning HAN ; Yiwen HAO ; Wubing HE ; Qiang HONG ; Ruiqin HOU ; Wei HOU ; Jie HU ; Peiyang HU ; Xi HU ; Xiaoyu HU ; Guangbin HUANG ; Jie HUANG ; Xiangyan HUANG ; Yuanshuai HUANG ; Shouyong HUN ; Xuebing JIANG ; Ping JIN ; Dong LAI ; Aiping LE ; Hongmei LI ; Bijuan LI ; Cuiying LI ; Daihong LI ; Haihong LI ; He LI ; Hui LI ; Jianping LI ; Ning LI ; Xiying LI ; Xiangmin LI ; Xiaofei LI ; Xiaojuan LI ; Zhiqiang LI ; Zhongjun LI ; Zunyan LI ; Huaqin LIANG ; Xiaohua LIANG ; Dongfa LIAO ; Qun LIAO ; Yan LIAO ; Jiajin LIN ; Chunxia LIU ; Fenghua LIU ; Peixian LIU ; Tiemei LIU ; Xiaoxin LIU ; Zhiwei LIU ; Zhongdi LIU ; Hua LU ; Jianfeng LUAN ; Jianjun LUO ; Qun LUO ; Dingfeng LYU ; Qi LYU ; Xianping LYU ; Aijun MA ; Liqiang MA ; Shuxuan MA ; Xainjun MA ; Xiaogang MA ; Xiaoli MA ; Guoqing MAO ; Shijie MU ; Shaolin NIE ; Shujuan OUYANG ; Xilin OUYANG ; Chunqiu PAN ; Jian PAN ; Xiaohua PAN ; Lei PENG ; Tao PENG ; Baohua QIAN ; Shu QIAO ; Li QIN ; Ying REN ; Zhaoqi REN ; Ruiming RONG ; Changshan SU ; Mingwei SUN ; Wenwu SUN ; Zhenwei SUN ; Haiping TANG ; Xiaofeng TANG ; Changjiu TANG ; Cuihua TAO ; Zhibin TIAN ; Juan WANG ; Baoyan WANG ; Chunyan WANG ; Gefei WANG ; Haiyan WANG ; Hongjie WANG ; Peng WANG ; Pengli WANG ; Qiushi WANG ; Xiaoning WANG ; Xinhua WANG ; Xuefeng WANG ; Yong WANG ; Yongjun WANG ; Yuanjie WANG ; Zhihua WANG ; Shaojun WEI ; Yaming WEI ; Jianbo WEN ; Jun WEN ; Jiang WU ; Jufeng WU ; Aijun XIA ; Fei XIA ; Rong XIA ; Jue XIE ; Yanchao XING ; Yan XIONG ; Feng XU ; Yongzhu XU ; Yongan XU ; Yonghe YAN ; Beizhan YAN ; Jiang YANG ; Jiangcun YANG ; Jun YANG ; Xinwen YANG ; Yongyi YANG ; Chunyan YAO ; Mingliang YE ; Changlin YIN ; Ming YIN ; Wen YIN ; Lianling YU ; Shuhong YU ; Zebo YU ; Yigang YU ; Anyong YU ; Hong YUAN ; Yi YUAN ; Chan ZHANG ; Jinjun ZHANG ; Jun ZHANG ; Kai ZHANG ; Leibing ZHANG ; Quan ZHANG ; Rongjiang ZHANG ; Sanming ZHANG ; Shengji ZHANG ; Shuo ZHANG ; Wei ZHANG ; Weidong ZHANG ; Xi ZHANG ; Xingwen ZHANG ; Guixi ZHANG ; Xiaojun ZHANG ; Guoqing ZHAO ; Jianpeng ZHAO ; Shuming ZHAO ; Beibei ZHENG ; Shangen ZHENG ; Huayou ZHOU ; Jicheng ZHOU ; Lihong ZHOU ; Mou ZHOU ; Xiaoyu ZHOU ; Xuelian ZHOU ; Yuan ZHOU ; Zheng ZHOU ; Zuhuang ZHOU ; Haiyan ZHU ; Peiyuan ZHU ; Changju ZHU ; Lili ZHU ; Zhengguo WANG ; Jianxin JIANG ; Deqing WANG ; Jiongcai LAN ; Quanli WANG ; Yang YU ; Lianyang ZHANG ; Aiqing WEN
Chinese Journal of Trauma 2024;40(10):865-881
Patients with severe trauma require an extremely timely treatment and transfusion plays an irreplaceable role in the emergency treatment of such patients. An increasing number of evidence-based medicinal evidences and clinical practices suggest that patients with severe traumatic bleeding benefit from early transfusion of low-titer group O whole blood or hemostatic resuscitation with red blood cells, plasma and platelet of a balanced ratio. However, the current domestic mode of blood supply cannot fully meet the requirements of timely and effective blood transfusion for emergency treatment of patients with severe trauma in clinical practice. In order to solve the key problems in blood supply and blood transfusion strategies for emergency treatment of severe trauma, Branch of Clinical Transfusion Medicine of Chinese Medical Association, Group for Trauma Emergency Care and Multiple Injuries of Trauma Branch of Chinese Medical Association, Young Scholar Group of Disaster Medicine Branch of Chinese Medical Association organized domestic experts of blood transfusion medicine and trauma treatment to jointly formulate Chinese expert consensus on blood support mode and blood transfusion strategies for emergency treatment of severe trauma patients ( version 2024). Based on the evidence-based medical evidence and Delphi method of expert consultation and voting, 10 recommendations were put forward from two aspects of blood support mode and transfusion strategies, aiming to provide a reference for transfusion resuscitation in the emergency treatment of severe trauma and further improve the success rate of treatment of patients with severe trauma.
2. Relationship between catecholamine level and gene polymorphism of β1 adrenergic receptor G1165C in children with EV71 infection in hand foot and mouth disease
Zhi-Xian LEI ; Bang-Tao LI ; Ya-Zhou WANG ; Qiu-Yu LIN ; Li-Rong ZHOU ; Xin LI ; Wei XIANG ; Hong-Ai LI ; Xiao-Ming LI ; Man-Fang XIE ; Qi WANG ; Nai-Chao FENG ; Dao-Mou ZHU ; Yuan-Ping HAI ; Lan CUI ; Ya-Qin ZHANG ; Zhi-Wen LIU ; Shou-Ye WU ; Yong-Zhao CHEN ; Hong-Ai LI ; Ting HUANG ; Lan CUI ; Ke-Qing ZHU ; Xiao-Jie HE
Asian Pacific Journal of Tropical Medicine 2017;10(5):473-477
Objective To investigate the relationship between the levels of plasma adrenaline and norepinephrine and gene polymorphism of β1 adrenergic receptor G1165C in children with enterovirus 71 (EV71) infection in hand foot and mouth disease (HFMD). Methods The polymerase chain reaction (PCR) was used to detect the expression of gene polymorphism of β1 adrenergic receptor G1165C in vitro. The levels of plasma adrenaline and norepinephrine were measured by enzyme-linked immunosorbent assay (ELISA). Results The plasma norepinephrine level of severe group was significantly higher than the mild group in children with EV71 infection in HFMD (P < 0.05); however, the levels of plasma adrenaline in two groups had no statistical differences (P > 0.05); There was no significant difference in the distribution of β1 adrenergic receptor G1165C genotype and allele between EV71 infection group and healthy control group (P > 0.05). Further analysis of EV71 infection group by dividing it into mild and severe groups showed that there was no significant difference in the distribution of genotype and allele between these two groups as well (P > 0.05). There was no significant difference in the levels of epinephrine and norepinephrine in different genotypes of EV71 infection group (P > 0.05), and in the levels of plasma epinephrine and norepinephrine in the mild and severe groups (P > 0.05). Conclusions As the disease gets worse, the plasma norepinephrine level has a rising trend in children with EV71 infection in HFMD, which is an important indicator to evaluate the progress of the disease. However, the gene polymorphism of β1 adrenergic receptor G1165C have no significant correlation, not only with the susceptibility and severity of EV71 infection in hand, foot and mouth disease, but also with the levels of catecholamine.
3.Pterional keyhole approach in surgical treatment of ruptured anterior circulation intracranial aneurysm: a report of 313 cases.
Wei YAN ; Chao-hui MOU ; Sheng WU ; Chen-han LING ; Qun WU ; Yuan HONG ; Sheng CHEN ; Feng CAI ; Jian-min ZHANG ; Gao CHEN
Journal of Zhejiang University. Medical sciences 2015;44(4):366-370
OBJECTIVETo review the surgical modality with pterional keyhole approach in treatment of anterior circulation aneurysm.
METHODSThree hundred and thirteen patients with ruptured anterior circulation intracranial aneurysm treated surgically with pterional keyhole approach between January 2009 and June 2014 in Department of Neurosurgery, the Second Affiliated Hospital of Zhejiang University School of Medicine, were included in the analysis. Complete occlusion rate of aneurysms and incidence of major complications including delayed cerebral ischemia and chronic hydrocephalus were documented. Surgical outcomes at 6-month follow up were assessed by modified Rankin Scale.
RESULTSTotally 348 aneurysms were treated with pterional keyhole approach, 326 aneurysms were completely clipped, 16 aneurysms were partly clipped, and 6 aneurysms were wrapped with gauze material. Among 313 patients, 15 patients (4.79%) suffered from delayed cerebral ischemia, and 10 patients (3.19%) suffered from hydrocephalus. At the 6-month follow up, the rate of good outcome was 66.77% (209/313).
CONCLUSIONSThe pterional keyhole approach can be used to clip most of anterior circulation aneurysms, and it seems to have advantages over the traditional approaches with lower incidence of complications and similar outcomes.
Aneurysm, Ruptured ; surgery ; Humans ; Intracranial Aneurysm ; surgery ; Neurosurgical Procedures ; methods ; Retrospective Studies ; Treatment Outcome
4.Traumatic diaphragmatic rupture with combined thoracoabdominal injuries: Difference between penetrating and blunt injuries.
Jin-Mou GAO ; Ding-Yuan DU ; Hui LI ; Chao-Pu LIU ; Shao-Yong LIANG ; Qiang XIAO ; Shan-Hong ZHAO ; Jun YANG ; Xi LIN
Chinese Journal of Traumatology 2015;18(1):21-26
PURPOSETraumatic diaphragmatic rupture (TDR) needs early diagnosis and operation. However, the early diagnosis is usually difficult, especially in the patients without diaphragmatic hernia. The objective of this study was to explore the early diagnosis and treatment of TDR.
METHODSData of 256 patients with TDR treated in our department between 1994 and 2013 were analyzed retrospectively regarding to the diagnostic methods, percentage of preoperative judgment, incidence of diaphragmatic hernia, surgical procedures and outcome, etc. Two groups were set up according to the mechanism of injury (blunt or penetrating).
RESULTSOf 256 patients with a mean age of 32.4 years (9-84), 218 were male. The average ISS was 26.9 (13-66); and shock rate was 62.9%. There were 104 blunt injuries and 152 penetrating injuries. Preoperatively diagnostic rate was 90.4% in blunt injuries and 80.3% in penetrating, respectively, P < 0.05. The incidence of diaphragmatic hernia was 94.2% in blunt and 15.1% in penetrating respectively, P < 0.005. Thoracotomy was performed in 62 cases, laparotomy in 153, thoracotomy plus laparotomy in 29, and combined thoraco-laparotomy in 12. Overall mortality rate was 12.5% with the average ISS of 41.8; and it was 21.2% in blunt injuries and 6.6% in penetrating, respectively, P < 0.005. The main causes of death were hemorrhage and sepsis.
CONCLUSIONSDiagnosis of blunt TDR can be easily obtained by radiograph or helical CT scan signs of diaphragmatic hernia. For penetrating TDR without hernia, "offside sign" is helpful as initial assessment. CT scan with coronal/sagittal reconstruction is an accurate technique for diagnosis. All TDR require operation. Penetrating injury has a relatively better prognosis.
Abdominal Injuries ; diagnostic imaging ; Adolescent ; Adult ; Aged ; Aged, 80 and over ; Child ; Diaphragm ; diagnostic imaging ; injuries ; Female ; Humans ; Male ; Middle Aged ; Multiple Trauma ; diagnostic imaging ; Retrospective Studies ; Rupture ; Thoracic Injuries ; diagnostic imaging ; Tomography, X-Ray Computed ; Wounds, Nonpenetrating ; diagnostic imaging ; Wounds, Penetrating ; diagnostic imaging
5.Pterional keyhole approach in surgical treatment of ruptured anterior circulation intracranial aneurysm:a report of 313 cases
Wei YAN ; Chao-Hui MOU ; Sheng WU ; Chen-Han LING ; Qun WU ; Yuan HONG ; Sheng CHEN ; Feng CAI ; Jian-Min ZHANG ; Gao CHEN
Journal of Zhejiang University. Medical sciences 2015;(4):366-370
Objective: To review the surgical modality with pterional keyhole approach in treatment of anterior circulation aneurysm.Methods: Three hundred and thirteen patients with ruptured anterior circulation intracranial aneurysm treated surgically with pterional keyhole approach between January 2009 and June 2014 in Department of Neurosurgery, the Second Affiliated Hospital of Zhejiang University School of Medicine, were included in the analysis. Complete occlusion rate of aneurysms and incidence of major complications including delayed cerebral ischemia and chronic hydrocephalus were documented.Surgical outcomes at 6-month follow up were assessed by modified Rankin Scale.Results: Totally 348 aneurysms were treated with pterional keyhole approach, 326 aneurysms were completely clipped, 16 aneurysms were partly clipped, and 6 aneurysms were wrapped with gauze material. Among 313 patients, 15 patients (4.79%) suffered from delayed cerebral ischemia, and 10 patients (3.19%) suffered from hydrocephalus.At the 6-month follow up, the rate of good outcome was 66.77% (209/313).Conclusions: The pterional keyhole approach can be used to clip most of anterior circulation aneurysms, and it seems to have advantages over the traditional approaches with lower incidence of complications and similar outcomes.
6.Treatment of chronic primary glomerulopathy patients of Shen deficiency and dampness heat syndrome by yishen qingli granule combined low-dose Tripterygium wilfordii multiglycoside tablet: a clinical efficacy observation.
Mei-Xiao SHENG ; Wei SUN ; Chang-Ying XING ; Fa-Huan YUAN ; Shui-Fu TANG ; Pei-Hua XIONG ; Ji-Pei MA ; Dong ZHOU ; Kun GAO ; Yan JIANG ; Ji-Hong CHEN ; Hui-Juan MAO ; Jiao MOU ; Yue-Zhong LUO ; Ming-Gang WEI ; Cai-Xiang LIU
Chinese Journal of Integrated Traditional and Western Medicine 2013;33(12):1636-1641
OBJECTIVETo evaluate the clinical efficacy and safety of treatment of chronic primary glomerulopathy (CPG) patients of Shen deficiency and dampness heat syndrome (SDDHS) by Yishen Qingli Granule (YQG) combined with low-dose Tripterygium Wilfordii multiglycoside Tablet (TWT).
METHODSTotally 231 CPG patients of SDDHS were enrolled in this study (including 60 patients from First Affiliated Hospital of Nanjing University of Chinese Medicine, 58 from First Affiliated Hospital of Nanjing Medical University, 46 from Xinqiao Hospital of Third Military Medical University, 35 from First Affiliated Hospital of Guangzhou University of Chinese Medicine, 14 from First Affiliated Hospital of Soochow University, and 18 from Wuxi Affiliated Hospital of Nanjing University of Chinese Medicine). They were randomly assigned to the control group (116 cases) and the trial group (115 cases) according to block group method. There were 217 cases in the safety analysis set (109 cases in the trial group vs 108 cases in the control group), and 203 cases in the full analysis set (99 cases in the trial group vs 104 cases in the control group). All patients received basic treatment such as ACEI/ARB. Furthermore, YQG (consisting of raw astragalus 10 g, prepared Polygonum Multiflorum 10 g, Pyrrosia 10 g, 1.5 g each package, containing 10 g of crude drugs) was additionally given to patients in the trial group, each package, twice daily. The TWT (10 mg) was given, twice a day. The TWT dose was adjusted according to 24 h urinary total protein (UTP). The placebos of YQG and TWT were administered to those in the control group. The treatment course consisted of 24 weeks and the follow-up visit lasted for 24 weeks. The biochemical indices were observed before and after treatment including 24 h UTP, urine red cell count (U(RBC)), renal functions (BUN, SCr), blood routine test (WBC), and liver functions (SGPT, SGOT). Reverse reactions such as gastrointestinal discomfort, skin rash, and irregular menstruation were also observed.
RESULTSCompared with the control group, the total effective rate was better in the trial group (82.83% vs 61.54%, P < 0.01). Results of stratified comparison of UTP showed better efficacy in the trial group (0.8-3.0 g/24 h, P < 0.01). The UTP decline occurred in the trial group after 8 weeks of treatment, with stable action, showing statistical difference when compared with the control group (P < 0.01). In the trial group, U(RBC) level decreased after treatment but changed more significantly. But there was no statistical difference in the changes when compared with the control group (P > 0.05). After treatment, there were no statistical difference in safety indicators such as WBC, SGPT, and SGOT between the two groups after treatment (P > 0.05).
CONCLUSIONOn the basis of basic treatment such as ACEI/ARB, application of YQG combined with low-dose TWT had better effect in controlling proteinuria of CPG patients, and could help stabilizing their conditions with less adverse reactions.
Adult ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Humans ; Kidney Diseases ; diagnosis ; drug therapy ; Kidney Glomerulus ; pathology ; Male ; Medicine, Chinese Traditional ; Middle Aged ; Phytotherapy ; methods ; Treatment Outcome ; Tripterygium
7.Efficacy and safety of Changfu peritoneal dialysis solution: a multi-center prospective randomized controlled trial.
Jian-Hui ZHOU ; Zhao-Hui NI ; Chang-Lin MEI ; Xue-Qing YU ; Fu-You LIU ; Li-Ning MIAO ; Zhi-Hong LIU ; Wei-Jie YUAN ; Ai-Ping ZHANG ; Hong-Li LIN ; Meng-Hua CHEN ; Jiang-Hua CHEN ; Jin-Yuan ZHANG ; Ya-Ni HE ; Jian CHEN ; Jiu-Yang ZHAO ; Xiao-Qiang DING ; Ying LI ; Rong-Shan LI ; Ru-Juan XIE ; Wen-Hu LIU ; Chang-Ying XING ; Rong WANG ; Yue-Yi DENG ; Xue-Ying CAO ; Guang-Yan CAI ; Shan MOU ; Zhi-Guo MAO ; Xiao YANG ; Hong LIU ; Jing SUN ; Yu-Sheng YU ; Jun LIU ; Shu-Mei SHI ; Long-Kai LI ; Na TIAN ; Xiao-Hui ZHANG ; Wei ZHOU ; Jie YANG ; Yong ZHANG ; Jing-di SUN ; Jun JI ; Tao ZHANG ; Yan YAN ; Xiao-Gang LIU ; Gang WANG ; Li ZHANG ; Hong ZHANG ; Jian-Hua LUO ; Xiang-Mei CHEN
Chinese Medical Journal 2013;126(22):4204-4209
BACKGROUNDA multi-center large scale study is needed to confirm the efficacy and safety of domestic peritoneal dialysis (PD) solutions. Some researchers believe that 6 L/d is enough for adequate dialysis, but there is no multi-center prospective study on Chinese population to confirm this. In this study, we evaluated the efficacy and safety of domestic PD solution (Changfu) and its difference between 6 L and 8 L dosage.
METHODSAdult PD patients who had taken PD therapy for at least one month were selected and divided into four groups according to two dialysis solution brands and two dialysis dosages, i.e., 6 L dose with Changfu dialysis solution, 6 L dose with Baxter dialysis solution, 8 L dose with Changfu dialysis solution, and 8 L dose with Baxter dialysis solution. After 48 weeks, the changes of primary and secondary efficacy indices were compared between different types and different dosages. We also analyzed the changes of safety indices.
RESULTSChanges of Kt/V from baseline to 48 weeks between Changfu and Baxter showed no statistical differences; so did those of creatinine clearance rate (Ccr). Normalized protein catabolic rate (nPCR) from baseline to 48 weeks between Changfu and Baxter showed no statistical differences; so did those of net ultrafiltration volume (nUF) and estimated glomerular filtration rate (eGFR). Changes of nPCR from baseline to 48 weeks between 6 L and 8 L showed no statistical differences; so did those of nUF and eGFR. The decline of Kt/V from baseline to 48 weeks in 6 L group was more than that in 8 L group. Change of Ccr was similar. During the 48-week period, the mean Kt/V was above 1.7/w, and mean Ccr was above 50 L×1.73 m(-2)×w(-1). More adverse events were found in Changfu group before Changfu Corporation commenced technology optimization, and the statistical differences disappeared after that.
CONCLUSIONSThe domestic PD solution (Changfu) was proven to be as effective as Baxter dialysis solution. During 48-week period, a dosage of 6 L/d was enough for these patients to reach adequate PD. Clinical study promotes technological optimization, further helps to improve the safety indices of the medical products.
Adolescent ; Adult ; Aged ; Dialysis Solutions ; therapeutic use ; Female ; Humans ; Male ; Middle Aged ; Peritoneal Dialysis ; methods ; Young Adult
8.Effective analysis of open reduction and internal fixation for the treatment of acute Lisfranc joint injury.
Hui ZHU ; Hong-mou ZHAO ; Feng YUAN ; Guang-rong YU
China Journal of Orthopaedics and Traumatology 2011;24(11):922-925
OBJECTIVESA retrospective study was used to evaluate the short to intermediate outcomes of open reduction and internal fixation of acute Lisfranc joint injuries.
METHODSFrom January 2003 to December 2009, 47 patients with Lisfranc injuries were treated in the study,41 patients were analyzed in current study with an average age of thirty-one years old. All of patients were treated with open reduction and internal fixation. According to the Myerson classification system, there were 9 type-A fractures, 7 type-B1, 11 type-B2, 10 type-C1, 5 type-C2. The AOFAS scale and VAS scale were used for the outcome measurement at the final follow-up.
RESULTSThere were 41 patients with 42 operations were followed up and with a mean time of 36 months (ranged, 12 to 71 months). The mean AOFAS score was (84.2 +/- 2.8) points (ranged, 65 to 100 points), with an excellent and good rate of 81 percent. The mean VAS score was (2.6 +/- 0.5) points (ranged, 0 to 6 points). Three patients developed superficial infection, and two developed skin necrosis. Nineteen patients had weight-bearing or walking pain. All of the patients had radiographic evidence of degenerative change, four with malunion of the second tarsometatarsal joint, and two of the patients with hallux valgus deformity change.
CONCLUSIONAccording to the results of the study, anatomic reduction and internal fixation can get the satisfactory results for the treatment of acute Lisfranc injuries during a short to intermediate follow-up time. All of the patients would have different degree of tarsometatarsal joint degenerative changes, but these changes are non-progressive and associated with minimal loss of function.
Acute Disease ; Adult ; Female ; Fracture Fixation, Internal ; methods ; Fractures, Bone ; surgery ; Humans ; Joint Dislocations ; surgery ; Ligaments, Articular ; injuries ; Male ; Metatarsal Bones ; surgery ; Middle Aged ; Retrospective Studies ; Tarsal Joints ; injuries ; surgery
9.Laparoscopic multi-point tie MESH repair of white line hernia: a case report.
Qi-long CHEN ; Yi-ping MOU ; Yu-cheng ZHOU ; Xiao-yan CAI ; Li-bo LI ; Geng-yuan HU ; Dan-hong PAN
Journal of Zhejiang University. Medical sciences 2011;40(5):573-574
Female
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Hernia, Ventral
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surgery
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Humans
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Laparoscopy
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methods
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Middle Aged
10.Experimental study on viscoelasticity of lumbar yellow ligament in young and old people
Xi yuan WANG ; Fu sheng YUAN ; Yuan shi ZHANG ; Hong mou YUAN ; Xi min FENG
Journal of Medical Biomechanics 2011;26(1):E075-E080
Objective To compare the stress relaxation and mechanical properties of creep viscoelasticity in the young and old’s spine and to provide the reference for the mechanical mechanism of viscoelasticity of yellow ligament degeneration. Method Twenty specimens of elderly patients with degenerative lumbar yellow ligament degeneration as the older group, and twenty specimens of young patients with lumbar yellow ligament injuries as the youth group were used respectively. All the yellow ligament specimens were from the yellow ligament between the fourth and fifth of lumbar vertebra (L4~L5). Stress relaxation experiment and creep experiment were conducted on the specimens by the strain increasing speed as 1%/s and the stress increasing speed as 0.5 MPa/s respectively. The experimental temperature was (36.5±0.5) ℃ and the experimental time was 7 200 s. Ninety stress relaxation and creep data were collected, and the data were dealt with the statistical analysis and normalization methods. Results The 7 200 s stress of yellow ligament in the youth group decreased by 1.42 MPa, while the 7 200 s stress of yellow ligament in the older group decreased by 1.91 MPa. The 7 200 s strain of yellow ligament in the youth group increased by 3.39%, while the 7 200 s strain of yellow ligament in the older group increased by 2.07%. The 7 200 s stress in two groups all increased and the increased strain data showed statistically significance (P<0.05). The stress relaxation curve changed in the form of logarithm and the creep curve changed in the form of index. Conclusions The 7 200 s stress relaxation and creep in the yellow ligament of the older group all decreased and the mechanical properties of viscoelasticity changed.

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