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In this study, the Web of Science and China National Knowledge Infrastructure(CNKI) were searched comprehensively for the literature about the research on Polygalae Radix. After manual screening, 1 207 Chinese articles and 263 English articles were included in this study. Excel was used to draw the line chart of the annual number of relevant publications. CiteSpace 6.1.R3 was used for the visual analysis of author cooperation, publishing institutions, keyword co-occurrence, keyword clustering, and bursts in the research on Polygalae Radix. The results showed that the number of articles published in Chinese and English increased linearly, which indicated the rising research popularity of Polygalae Radix. WANG J and LIU X were the authors publishing the most articles in Chinese and English, respectively. Shanxi University of Chinese Medicine and Chinese Academy of Medical Sciences were the research institutions with the largest number of Chinese and English publications in this field, respectively. The institutions publishing the relevant articles in English formed a system with the Chinese Academy of Medical Sciences as the core. According to the keywords, the research hotspots of Polygalae Radix included variety selection and breeding, quality standard, extraction and identification of active chemical components, prescription compatibility, processing, clinical medication rules, and pharmacological mechanism. The research frontiers were the molecular mechanisms of Polygalae Radix and its active components in exerting the protective effect on brain nerve, regulating receptor pathways, alleviating anxiety and Alzheimer's disease, as well as data mining and clinical medication summary. This study has reference significance for the topic selection and frontier identification of the future research on Polygalae Radix.
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Melhoramento Vegetal , China , Raízes de Plantas/química , Encéfalo , PublicaçõesRESUMO
Objective To develop a field medical equipment maintenance trailer for patrol inspection and maintenance of medical equipment in wartime and peace time.Methods A field medical equipment maintenance trailer was constructed with the components of a shelter,a chassis,an electrical system and etc.The shelter had a power supply area on the front side,two working areas on left and right sides,a control area on the rear side and a support mechanism covered with a rainproof tarpaulin;The chassis was composed mainly of a frame,a traction mechanism,a steering mechanism,a suspension,a braking system and etc;the electrical system was made up of a power supply unit and a control unit.Results The maintenance trailer carrying a variety of maintenance tools and spare parts was trailed with the transport vehicle during maneuvering and driven electrically during equipment maintenance,which was ready for use immediately after deployment so as to meet the needs for rapid maintenance of medical equipment.Conclusion The maintenance trailer gains advantages in internal layout,mobility and security,and can be used to inspect and maintain medical equipment and to transport spare parts and maintenance tools.[Chinese Medical Equipment Journal,2023,44(11):114-116]
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Objective:To investigate the clinical characteristics of old patients with spinal cord injury. Methods:From January 1, 2013 to December 31, 2019, totally 386 old (≥ 60 years) patients with spinal cord injury were enrolled. Their gender, age, etiology, American Spinal Injury Association Impairment Scale (AIS) and complications were analyzed. Results:In the old patients with spinal cord injury, traumatic spinal cord injury was more common in males (71.17%) and non-traumatic spinal cord injury was more common in females (56.19%). Fall on level surface was the most important cause of spinal cord injury both in old men (28.83%) and women (24.76%). Tumor (19.05%) was the most common non-traumatic cause of spinal cord injury in old female patients. Cervical segment (78.46%) was the most common site of injury in old traumatic spinal cord injury, while thoracic segment (52.14%) was the most common site of injury in non-traumatic spinal cord injury. Grade D (38.08%) was the most common AIS grade, followed by grades C (28.76%), A (21.50%), and B (11.66%). Spinal canal stenosis (23.31%) played an important role in the etiology of old spinal cord injury. Neuralgia, venous thrombosis of lower extremities and urinary tract infection were the most common complications in old patients with spinal cord injury. Conclusion:Fall on level surface is the leading cause of spinal cord injury in old patients, and the proportion of fall in the etiology of old spinal cord injury tends to increase with age. It is important to take effective measures to avoid falling in the old adults to prevent spinal cord injury.
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Objective:To investigate the outcome of neurological function and the clinical characteristics of complications in children with spinal cord injury. Methods:From 2011 to 2019, children under 15 years old with spinal cord injury were selected in our hospital. Their level of injury and American Spinal Injury Association Impairment Scale (AIS) at one month, three months and one year were recorded. And the complications such as pressure ulcers/scald, urinary tract infection, hydronephrosis/vesicoureteral reflux, constipation, osteoporosis/fracture, deep vein thrombosis, neurodynia, heterotopic ossification, scoliosis and hip dysplasia were analyzed. Results:Of 159 individuals, 41 were boys and 118 were girls, the average age at injury was (6.08±2.57) years. The main cause of spinal cord injury was sports accidents (47.8%), and the main injury sites were thoracic spinal cord injury (89.3%). The cause of spinal cord injury was correlated with age at injury (r = -0.160, P = 0.044), gender (r = -0.458, P < 0.001) and injury sites (r = -0.249, P = 0.002). Complete spinal cord injury counted for 71.7%, and the AIS grade at one month was correlated with that at twelve months (r = 0.984, P < 0.001). The main complications were urinary tract infection (69.2%), constipation (67.9%), hydronephrosis/vesicoureteral reflux (37.7%), scoliosis (25.8%) and hip dysplasia (25.2%). The incidence of ulcers/scald was correlated with injury site (r = 0.179, P = 0.024). The AIS grade three months after injury was significantly correlated with urinary tract infection, constipation, scoliosis and hip dysplasia (|r| > 0.227, P < 0.01). The incidence of ulcers/scald was correlated with osteoporosis/fracture (r = 0.208, P < 0.01). The incidence of urinary tract infection was significantly correlated with hydronephrosis/vesicoureteral reflux, constipation, scoliosis and hip dysplasia (r > 0.261, P < 0.001), as well as osteoporosis/fracture (r = 0.195, P < 0.05). The incidence of hydronephrosis/vesicoureteral reflux was significantly correlated with constipation, osteoporosis/fracture, scoliosis and hip dysplasia (r > 0.146, P < 0.01). The incidence of constipation was significantly correlated with scoliosis and hip dysplasia (r > 0.313, P < 0.01), as well as osteoporosis/fracture (r = 0.160, P < 0.05). The incidence of osteoporosis/fracture was significantly correlated with scoliosis and hip dysplasia (r > 0.342, P < 0.01). The incidence of scoliosis was significantly correlated with hip dysplasia (r = 0.818, P < 0.001). Conclusion:The recovery of neurological function after spinal cord injury in children is closely correlated to AIS. The outcome of complete spinal cord injury is poor. The common complications after spinal cord injury in children demonstrate specific age characteristics, and the incidence of urinary tract infection, constipation, hydronephrosis/vesicoureteral reflux, scoliosis and hip dysplasia are common complications, which need more attention.
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Objective:To analyze the changes of bone mineral density (BMD), the characteristics of bone metabolic markers and related factors in patients with spinal cord injury (SCI). Methods:A total of 78 patients with SCI in our hospital from April, 2018 to May, 2020 were selected and divided into groups according to the injury courses. The people receiving physical examination in the same period were selected as control. BMD of proximal femur was measured by dual energy X-ray absorptiometry. Bone metabolic markers were detected. The correlation between BMD and clinical indicators was analyzed. Results:There was no difference in BMD between the patients within three months and the controls (P > 0.05). BMD at trochanter major, intertrochanteric and total hip in patients three to six months post injury was lower than that in the controls (|t| > 2.242, P < 0.05). The BMD at femoral neck, trochanter major, intertrochanteric and total hip in patients during six to twelve months post injury was lower than that in the controls (|t| > 2.026, P < 0.05). BMD at proximal femur in patients with twelve to 24 months post injury was lower than that in the controls (|t| > 2.189, P < 0.05). The decrease of BMD aggravated with the course of injury. There was no difference in BMD between paraplegia and quadriplegia, complete injury and incomplete injury (P > 0.05). Collagen type I C-terminal telopeptide (CTX) and N-terminal propeptide of type l precollagen (PINP) were higher than the reference range in the course of each injury, increased within three months post injury, reached the peak at three to six months post injury, and decreased to a steady state since seven months post injury. Vitamin D deficiency occurred in 87.5% of the patients. BMD at femoral neck and total hip was negatively correlated with the course of injury (|r| > 0.250, P < 0.05), and positively correlated with body mass index (r > 0.255, P < 0.05). Conclusion:The longer the duration of SCI, the more decrease of BMD. The early bone metabolism of patients with SCI is high conversion type. The rate of vitamin D deficiency in patients with SCI is quite high. It is necessary to detect and evaluate the bone metabolic markers combined with BMD at the early stage of SCI.
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Objective:To explore the clinical manifestations and MRI features of pediatric spinal cord injury (SCI) after back bend. Methods:A retrospective study was performed. All the medical records and MRI images of children with SCI after back bend were identified in Beijing Bo'ai Hospital from January 1st, 2002 to August 31st, 2020. Results:A total of 120 SCI children after back bend were reviewed, out of whom 119 cases were girls, one case was boy. The age ranged from 38 to 162 months, with the median age of 76 months. More cases were discovered in July and September every year (32 cases, 26.7%), as well as in weekends (67 cases, 55.8%). The main clinical manifestations were sensory and motor dysfunction of both lower limbs (120 cases, 100%), bladder and bowl incontinence (120 cases, 100%). The common first symptoms included sudden attack of lumbar pain (39 cases, 32.5%), lower limbs paralysis (30cases, 25.0%) and leg pain (10 cases, 8.3%). The peak time of symptoms ranged from five minutes to two days, with the median time of 50 minutes. The MRI features of 104 children with SCI within one week after back bend were as follows: the abnormal signals of MRI in spinal cord involved lower cervical and all the following segments of spinal cord. The number of the segments of spinal cord with abnormal signals ranged from two to 15, with the median of seven segments. The most common segments with abnormal signals were T9 (96 cases, 92.3%), T10 (96 cases, 92.3%) and T11 (90 cases, 86.5%). Among the cases followed up, 48 cases with complete injury demonstrated a vast and serous spinal cord atrophy (SCA) below the injury segments as early as 37 days after the injury, the SCA would become worse at the chronic stage and maybe involve the spinal cord above the injury segments. In 31 cases with incomplete injury, the abnormal signals of MRI in spinal cord were limited in the lumbar enlargement, with a various degree of SCA at the late stage. All the cases were diagnosed as SCI without radiologic abnormality, out of whom 89 (74.2%) cases suffered from thoracic complete SCI, 31 (25.8%) cases suffered thoracic or lumbar incomplete SCI. The common complications included scoliosis, hip joint dysplasia, urinary tract infection, hydronephrosis, osteoporosis, pathological fracture of lower limbs and valgus knee. Conclusion:The main clinical symptoms of pediatric SCI after back bend were sudden lumbar pain, sensory and motor dysfunction of both lower limbs, and bladder and bowl incontinence. Most of the cases were thoracic complete SCI, the MRI features at the early stage were multiple segments of abnormal signals of spinal cord around T9 and T10, and later an extensive severe SCA below the injury segments to the conus medullaris, accompanied by the SCA above the injury segments.
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Objective:To investigate the occurrence and related factors of autonomic dysreflexia (AD) during intermittent catheterization in patients with spinal cord injury (SCI). Methods:Case control study was used in this study. Intermittent catheterization was performed on 44 SCI patients hospitalized from April, 2019 to April, 2020, The data of age, gender, time after injury, segment of injury, degree of injury, resting blood pressure, immediate blood pressure after catheterization, catheterization numbers, catheterization volume and duration of catheterization were collected. Descriptive analysis and binary Logistic regression analysis were used to analyze the occurrence and related factors of AD. Results:Totally, AD happened in 26 (59.1%) patients. Urethral catheterization was done 1738 times, out of which AD accounted for 187 times (10.8%). The risk of AD increased with the time after injury and age (P < 0.05). The probability of AD was lower in T7 SCI and below than in T6 SCI and above (P = 0.002). Catheterization numbers, gender, degree of injury, catheterization volume and duration of catheterization were not influencing factors of AD (P > 0.05). Conclusion:It is necessary to have a full understanding for the occurrence of AD in patients with SCI during intermittent catheterization. For patients with SCI in T6 and above, long time after injury and elderly patients, routine monitoring of blood pressure during intermittent catheterization is recommended to detect and deal with AD in time.
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Objective:To observe the relationship between bone metabolism biochemical markers and clinic features in patients with spinal cord injury. Methods:From July, 2018 to December, 2019, totally 135 patients with spinal cord injury were enrolled. They were assessed with American Spinal Injury Association Impairment Scale (AIS). β-collagen type I C-terminal telopeptide (β-CTX), total N-terminal propeptide of type I precollagen (TP1NP), 25-hydroxyvitamin D [25(OH)D] and parathyroid hormone (PTH), serum calcium and serum phosphorus were measured. The level of TP1NP, β-CTX, 25(OH)D and PTH among clinical characteristics (gender, age, disease course, AIS grade and so on) were analyzed. Results:The levels of β-CTX and 25(OH)D were lower in women than in men (|t| > 2.044, P < 0.01). There was difference in the level of 25(OH)D among different ages (F = 3.156, P < 0.05). The levels of β-CTX and TP1NP increased in the first four months after spinal cord injury, and decreased then; while the level of PTH decreased in the first four months, and increased then (P < 0.001). The level of β-CTX was lower in patients of AIS D than in patients of AIS A and C (t >2.679, P < 0.05). The level of TP1NP was higher in paraplegics than in quadriplegics (Z = -2.035, P < 0.05). The level of β-CTX was higher in patients with fractures or surgeries involving bone than in patients without fractures or surgeries involving bone (t = 2.169, P < 0.05). There was no difference in all the bone metabolism markers between patients with and without lower extremity motor function (t < 0.839, Z < 1.822, P > 0.05). The ratio of 25(OH)D deficience was 85.19%. Conclusion:Bone conversion was active in the first four months after spinal cord injury, and decreased gradually then, which may be related to fractures of spine or surgeries involving spine after injury. The effect of spinal cord injury on bone metabolism markers is not clear. Most of patients with spinal cord injury were lack of vitamin D.
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Objective:To explore the etiological features and prevention strategies for pediatric spinal cord injury (SCI). Methods:A retrospective study of etiology and demographics features was performed and all the children with SCI (less than 14 years old) were identified in our hospital from January 1st, 2015 to December 31st, 2019. Results:A total of 221 children with SCI were reviewed, with 62 boys and 159 girls. The age ranged from one to 13 years with the median age of six years old. Children aged four to seven years accounted most (55.7%), and were mainly girls (83.7%). Sports and leisure activities (78 cases, 35.3%), non-traumatic causes (56 cases, 25.3%), other traumatic causes (48 cases, 21.7%), transport activities (24 cases, 10.9%) and falling from height (12 cases, 5.4%) were the top five leading causes of pediatric SCI. Among the cases caused by sports and leisure activities, 96.2% (75/78) were related to back bend in dancing exercise, in which most were five to seven years old (80.0%), and all of them were thoracic cord injury without radiologic abnormality, in which 70.7% (53/75) suffered from complete SCI. Conclusion:Pediatric SCI after back bend in dancing exercise is increasing rapidly in recent years. More attention should be paid on education about professional evaluation and the risk of back bend before dancing exercise, and more protective measures should be implemented.
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Objective:To explore the modification of the 2019 International Standards for Neurological Classification of Spinal Cord Injury (ISNCSCI) worksheet and the significance for clinical practice. Methods:The 2019 ISNCSCI worksheet (English version) was compared literally with the 2015 ISNCSCI worksheet (English version) to find the advantages of current version and analyze its significance. Results:Five modifications were found in the 2019 ISNCSCI worksheet, in which the muscle function grading, the sensory grading and how to determine the zone of partial preservation were modified. Conclusion:The ASIA International Standards Committee made prudent modification according to the experience of the 2015 ISNCSCI worksheet to make the worksheet more scientific and clearer for recording.
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Objective:To investigate the test-retest reliability and inter-rater reliability of Numerical Rating Scale (NRS) for abnormal sensation points of patients with spinal cord injury (SCI). Methods:From October, 2016 to December, 2018, 69 patients with SCI were enrolled. Their impaired sensory points were measured with NRS. The score of sensory points was tested by examiner A firstly, and examiner B did the same work next day. Then, the examiner A retested the same patients after three weeks. Results:The Pearson correlation coefficients and intraclass correlation coefficient (ICC) of the test-retest reliability and inter-rater reliability for sensory score of both sides were all above 0.88 and 0.93 respectively (P < 0.001). The Pearson correlation coefficients and ICC of the sensory score of the different injury levels were all above 0.88 and 0.93 respectively (P < 0.001). Conclusion:NRS has high test-retest reliability and inter-rater reliability for the assessment at abnormal sensation points of patients with SCI.
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Objective To analyze the colonic transit time in patients with different severities of constipation.Methods From June, 2015 to September, 2017, 73 male patients with supraconal spinal cord injury were grouped as mild constipation group (n = 25) and severe constipation group (n = 48). They were measured the transit time of entire colorectum, ascending colon (including the right colic flexure), transverse colon, descending colon (including the left colic flexure) and rectosigmoid with Abrahamsson method.Results The transit time of entire colorectum, transverse colon, descending colon increased in the severe constipation group compared with that of the mild constipation group (P < 0.05). For each group, the transit time of rectosigmoid was the longest among colon segments (P < 0.05).Conclusion The colonic transit time of SCI male patients with various constipation is different in colon segments. Accurate interventions are needed to target colon segments.
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Objective: To clone and characterize a basic helix-loop-helix (bHLH) transcription factor SmbHLH93 from Salvia miltiorrhiza, and to predict its probable function. Methods: SmbHLH93 was cloned by PCR and RT-PCR from genomic DNA and cDNA, while its 5' promoter region was cloned by BD Walking. Analysis on physico-chemical property, structure characteristic, and phylogenetic relationships of SmbHLH93 protein was carried out by bioinformatic method. Gene expression in different organs and inducing conditions was detected by qPCR. Results: Gene sequences of SmbHLH93 (954 bp) were obtained, including three introns and four exons, and the open reading frame was 657 bp, encoding 218 amino acids. Its promoter region had 1 583 bp nucleotides. The putative SmbHLH93 protein contains bHLH and ACT_UUR-ACR-like domains, without transmembrane helices, and located in the nucleus. The gene expression was highest in roots and lowest in stems. With the development of flowers, its expression decreased gradually. Light and low temperature could induce high expression of SmbHLH93, while salicylicacid (SA) inhibited its expression. Conclusion: A new member of bHLH transcription factor, SmbHLH93, is cloned from S. miltiorrhiza, and it could be involved in the development of flower and regulation of secondary metabolic pathways in S. miltiorrhiza.
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<p><b>OBJECTIVE</b>To establish an effective method for isolating and culturing outer root sheath (ORS) bulge cells, dermal sheath cells (DSCs) and dermal papilla cells (DPCs) derived from human hair follicle.</p><p><b>METHODS</b>Small scalp specimens were incubated in the presence of dispase at 37 degrees celsius; for 2 h, the hair shafts with ORS embedded in the dermal sheath (DS) were extracted under dissecting microscope, and the ORS tissue were inoculated onto Petri dish. The specimens were transected at the interface between the dermis and subcutaneous tissue. The portions of DS and DP (linked with and enclosed by DS) embedded in the adipose tissue were pulled out and incubated with collagenase at 37 degrees celsius; for 6-8 h, and the DP and DSCs were isolated by repeated low-speed centrifugation and cultured respectively on Petri dishes. The cultured ORS bulge cells were identified by immunohistochemistry with K19 antibody and DPCs and DSCs by immunohistochemistry with alpha-actin antibody.</p><p><b>RESULTS</b>Purified ORS bulge cells, DSCs and DPCs could be harvested from the same human hair follicle.</p><p><b>CONCLUSION</b>This new method allows efficient, rapid, and simultaneous isolation and culture of ORS bulge cells, DSCs and DPCs.</p>
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Humanos , Técnicas de Cultura de Células , Métodos , Separação Celular , Células Cultivadas , Derme , Biologia Celular , Folículo Piloso , Biologia Celular , Imuno-Histoquímica , Couro Cabeludo , Biologia CelularRESUMO
<p><b>OBJECTIVE</b>To observe the hair follicle regeneration after subcutaneous implantation of hair follicle cell mixture in nude mice.</p><p><b>METHODS</b>The hair papilla cells, dermal sheath cells, outer root sheath and fibroblasts of human scalp were mixed with the hair follicle epithelial cells and implanted subcutaneously in nude mice to observe the regeneration of the hair follicle.</p><p><b>RESULTS AND CONCLUSION</b>Formation of intact hair follicle-like structures was observed in the skin sections of the recipient nude mice, suggesting the feasibility of this approach for hair follicle regeneration in vivo.</p>
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Animais , Humanos , Camundongos , Transplante de Células , Folículo Piloso , Biologia Celular , Metabolismo , Fisiologia , Transplante , Injeções Subcutâneas , Camundongos Nus , Regeneração , Pigmentação da Pele , Fatores de TempoRESUMO
@#Objective To observe the effect of underwater treadmill training on patients with incomplete spinal cord injury (SCI).Methods 11 patients with incomplete SCI were treated with underwater treadmill training, besides other comprehensive rehabilitation. Motor and sense scores were assessed using ASIA2000 standard and recorded before and after the underwater treadmill training. Walking distances, maximal walking velocity when training and changes of activities of daily living (ADL) before and after training were also recorded.Results After underwater treadmill training, the sense score of ASIA increased ( P<0.05), motor score of ASIA, and scores of walking distance, maximal walking velocity and ADL increased significantly ( P<0.01).Conclusion The underwater treadmill training along with other routine rehabilitation treatment may be helpful to improve motor and sensory functions and ADL of patients with incomplete SCI.
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@#ObjectiveTo investigate the rule of changes of the soleus mass and expression of myosin heavy chain (MHC) isoforms mRNA.Methods40 female Wistar rats were divided randomly into the control group and three spinal cord transection (ST) groups, ST7, ST15, and ST30 with 10 animals in each group. Rats in ST groups were subjected to a complete ST between T8 and T10 levels. The right soleus was dissected and weighed at 7, 15, 30 days after ST, and the expression of MHC mRNA isoforms was measured by semi-quantitative reverse transcriptase polymerase chain reaction (RT-PCR).ResultsThe Absolute and relative soleus masses in three ST groups were lower significantly than those of control group (P<0.05). The soleus mass in ST15 and ST30 groups were lower than that of ST7 group (P<0.05). The soleus of control group predominantly expressed MHC-I and some MHC-IIa, whereas the soleus began to express MHC-IIx and MHC-IIb after ST, except for MHC-I and MHC-IIa. ST induced consistently down-regulation of MHC-I mRNA and up-regulation of MHC-IIx and MHC-IIa at three time points after ST. The level of MHC-IIb mRNA expression was very low at three time points after ST.ConclusionST can influence the soleus mass at early stage after ST. ST induces a shift toward a faster muscle phenotype from slow to fast MHC isoform. MHC demonstrates plasticity in response to decrease neuromuscular activation.
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@#ObjectiveTo investigate the clinical manifestation, mechanism and optimal treatment of hydronephrosis after spinal cord injury. Methods58 slight and moderate cases were retrospectively analyzed. ResultsThere were no differences in the remitted time among the therapies of indwelling catheter, intermittent catheterization and medicine, mixed therapy. 56 (96.55%) SCI hydronephrosis remitted after treatment, 28(48.28%) recurred within 3 months. The recurrence rate of the patients with detrusor sphincter dyssynergia (57.14%) was higher than that of the detrusor hyperreflexia (28.57%) and the detrusor hyporeflexia (14.29%). The recurrence was associated with the fact that many patients couldn't keep up with the systematic therapy.ConclusionThe onset of SCI hydronephrosis is indistinct and recurrent easily. Keeping up with intermittent catheterization and taking medicine can prevent SCI hydronephrosis recurrence effectively.
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@#Objective To survey the situation of spinal cord injuries (SCI) in Beijing.Methods China Rehabilitation Research Center and Information Center of Beijing Health Bureau sponsored the surveillance of 86 hospitals in Beijing which had hospitalized SCI patients in 2002. The faculty of surveillance was composed of trained professionals. The number of registered SCI patients in 2002 was 1077, and 264 patients in 11 hospitals were chosen to be investigated in detail according to stratified sampling result.Results There were 1077 registered patients with a neurological deficit and the annual SCI incidence was 60 per million. The ratio of male to female was 3:1 and the ratio of cervical, thoracic, lumbar injuries and others is 4.9%, 28%, 66.7%, 0.4% respectively. The mean age at the time of injury was 41 years. The causes most frequently seen were falls from a height and traffic accidents. The mean time of hospitalization was 18.9 days and the mean expenditure of hospitalization was 27819.3 RMB. Four patients were transferred to rehabilitation hospitals, and others went homes directly after discharge.Conclusion There are many reasons for the high annual SCI incidence in Beijing and the first SCI cause was falling from a height, which should be pay special attention when the prevention measures are taken into account. The rate of SCI patients who received systemic medical rehabilitation was low.