Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 6 de 6
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
Chin Med J (Engl) ; 136(18): 2221-2228, 2023 Sep 20.
Artigo em Inglês | MEDLINE | ID: mdl-37545035

RESUMO

BACKGROUND: The effect of arteriosclerotic intracranial arterial vessel wall enhancement (IAVWE) on downstream collateral flow found in vessel wall imaging (VWI) is not clear. Regardless of the mechanism underlying IAVWE on VWI, damage to the patient's nervous system caused by IAVWE is likely achieved by affecting downstream cerebral blood flow. The present study aimed to investigate the effect of arteriosclerotic IAVWE on downstream collateral flow. METHODS: The present study recruited 63 consecutive patients at the Second Hospital of Hebei Medical University from January 2021 to November 2021 with underlying atherosclerotic diseases and unilateral middle cerebral artery (MCA) M1-segment stenosis who underwent an magnetic resonance scan within 3 days of symptom onset. The patients were divided into 4 groups according to IAVWE and the stenosis ratio (Group 1, n = 17; Group 2, n = 19; Group 3, n = 13; Group 4, n = 14), and downstream collateral flow was analyzed using three-dimensional pseudocontinuous arterial spin labeling (3D-pCASL) and RAPID software. The National Institutes of Health Stroke Scale (NIHSS) scores of the patients were also recorded. Two-factor multivariate analysis of variance using Pillai's trace was used as the main statistical method. RESULTS: No statistically significant difference was found in baseline demographic characteristics among the groups. IAVWE, but not the stenosis ratio, had a statistically significant significance on the late-arriving retrograde flow proportion (LARFP), hypoperfusion intensity ratio (HIR), and NIHSS scores ( F = 20.941, P <0.001, Pillai's trace statistic = 0.567). The between-subject effects test showed that IAVWE had a significant effect on the three dependent variables: LARFP ( R2 = 0.088, F = 10.899, P = 0.002), HIR ( R2 = 0.234, F = 29.354, P <0.001), and NIHSS ( R2 = 114.339, F = 33.338, P <0.001). CONCLUSIONS: Arteriosclerotic IAVWE significantly reduced downstream collateral flow and affected relevant neurological deficits. It was an independent factor affecting downstream collateral flow and NIHSS scores, which should be a focus of future studies. TRIAL REGISTRATION: ChiCTR.org.cn, ChiCTR2100053661.


Assuntos
Imageamento por Ressonância Magnética , Artéria Cerebral Média , Humanos , Constrição Patológica/patologia , Imageamento por Ressonância Magnética/métodos , Artéria Cerebral Média/patologia , Tomografia Computadorizada por Raios X
2.
Clin Imaging ; 98: 16-21, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-36989887

RESUMO

PURPOSE: To investigate the relationship between filling defects in the left atrial appendage restricted to the early phase of cardiac computed tomography (CCT), and ischemic stroke in patients with atrial fibrillation (AF). MATERIALS AND METHODS: A total of 152 patients with non-valvular AF were retrospectively enrolled and divided into two groups according to the stroke history, as confirmed by brain computed tomography (CT) or magnetic resonance imaging (MRI), as the non-stroke group (n = 89) and stroke group (n = 63), respectively. The numbers of patients with filling defects in the early phase of CCT images without thrombi were recorded. Morphological parameters of the LAA were measured for all participants. All patients with early-phase filling defects (n = 44) were assigned to two groups according to ischemic stroke history: the filling defects with stroke group (n = 28) and the filling defects without stroke group (n = 16). The clinical characteristics and LAA morphological parameters were compared. RESULTS: Univariate analysis showed that compared with the non-stroke group,LAA volume index and age were higher in the stroke group, and the ratio of early phase filling defect in LAA, hypertension and diabetes were also higher, in the meanwhile the LVEF and BMI were lower (P < 0.05).After adjusting confounding factors by the multivariate logistic regression analysis, filling defect was significantly related with stroke [odds ratio (OR): 4.339, 95% confidence interval (CI): 1.951-9.653, P = 0.000]. LAA morphological parameters were not significantly different between the filling defects with stroke group and the group without stroke. CONCLUSION: AF patients with LAA non-thrombotic filling defects in the early-phase of CCT had an increased risk of ischemic stroke compared to those without filling defects. This finding may help to optimize stroke risk stratification in patients with AF.


Assuntos
Apêndice Atrial , Fibrilação Atrial , AVC Isquêmico , Acidente Vascular Cerebral , Trombose , Humanos , AVC Isquêmico/etiologia , AVC Isquêmico/complicações , Apêndice Atrial/diagnóstico por imagem , Estudos Retrospectivos , Acidente Vascular Cerebral/etiologia , Fibrilação Atrial/complicações , Fibrilação Atrial/diagnóstico por imagem , Tomografia Computadorizada Multidetectores/métodos , Trombose/etiologia , Ecocardiografia Transesofagiana/efeitos adversos
3.
Shanghai Kou Qiang Yi Xue ; 31(3): 309-312, 2022 Jun.
Artigo em Chinês | MEDLINE | ID: mdl-36204963

RESUMO

PURPOSE: To investigate the feasibility of immediate implantation after extraction of anterior teeth in patients with periodontal disease and its clinical effect within 2 years. METHODS: Thirty patients (36 implants) who underwent anterior dental implant treatment for periodontal disease from 2016 to 2018 were randomly divided into immediate implantation group (17 implants) and delayed implantation group (19 implants). The patients were followed up for 2 years, the clinical parameters such as periodontal probing depth, pink esthetic score(PES)and implant neck bone resorption volume of implant neck were obtained. The data was statistically analyzed with SPSS 21.0 software package. RESULTS: During the 2-year follow-up period, no implant loss, and there was no significant difference in the depth of peri-implant probing between the two groups at each time point(P>0.05). There was no significant difference in the volume of bone resorption at implant neck between the two groups(P>0.05). At 6, 12 and 24 months after completion of superstructure repair, there was no significant difference in pink esthetic score(PES)between the two groups (P>0.05), but there was significant difference in pink esthetic score(PES) at the third month after restoration (P<0.05). The immediate implantation group obtained more satisfactory soft tissue morphology around the implants. CONCLUSIONS: Under appropriate treatment conditions, there is no significant difference in implant success rate between immediate implantation and delayed implantation of anterior teeth in patients with periodontal disease. At the same time, it reduces the number of operations and shortens the course of treatment. In terms of soft tissue aesthetics, immediate implantation is slightly better than delayed implantation in the early stage after restoration, and can maintain a good soft tissue aesthetic effect.


Assuntos
Perda do Osso Alveolar , Implantes Dentários para Um Único Dente , Implantes Dentários , Carga Imediata em Implante Dentário , Doenças Periodontais , Implantação Dentária Endóssea , Implantes Dentários para Um Único Dente/efeitos adversos , Estética Dentária , Humanos , Carga Imediata em Implante Dentário/efeitos adversos , Doenças Periodontais/diagnóstico por imagem , Doenças Periodontais/cirurgia , Extração Dentária , Resultado do Tratamento
4.
Shanghai Kou Qiang Yi Xue ; 24(5): 607-10, 2015 Oct.
Artigo em Chinês | MEDLINE | ID: mdl-26598198

RESUMO

PURPOSE: To evaluate the esthetic outcomes of immediate single-tooth implant restoration in anterior maxilla with the pink esthetic score (PES). METHODS: Nine patients were treated with 9 Straumann implants by immediate single-tooth implant restoration in anterior maxilla. Assessment of PES after crown placement at 1 week (baseline) and 6 months after implantation was conducted. Statistical analysis was performed using SPSS 16.0 software package. RESULTS: Nine implants achieved a retention rate of 100%. PES for single-tooth implant was 10.33 ± 1.50 at 1 week and 11.44 ± 0.88 at 6 months after crown placement. The difference was significant(P=0.021). CONCLUSIONS: This study indicates that immediate single-tooth implant restoration in anterior maxilla is predictable. Immediate single-tooth implantation can result in good clinical esthetic results in most patients with single-tooth missing in anterior maxilla.


Assuntos
Implantes Dentários para Um Único Dente , Estética Dentária , Maxila , Coroas , Estética , Humanos , Perda de Dente , Resultado do Tratamento
5.
Neural Regen Res ; 8(33): 3159-66, 2013 Nov 25.
Artigo em Inglês | MEDLINE | ID: mdl-25206637

RESUMO

Radiculopathy, commonly induced by intervertebral disk bulging or protrusion, is presently diagnosed in accordance with clinical symptoms because there is no objective quantitative diagnostic criterion. Diffusion tensor magnetic resonance imaging and diffusion tensor tractography revealed the characterization of anisotropic diffusion and displayed the anatomic form of nerve root fibers. This study included 18 cases with intervertebral disc degeneration-induced unilateral radiculopathy. Magnetic resonance diffusion tensor imaging was creatively used to reveal the scanning pattern of fiber tracking of the spinal nerve root. A scoring system of nerve root morphology was used to quantitatively assess nerve root morphology and functional alteration after intervertebral disc degeneration. Results showed that after fiber tracking, compared with unaffected nerve root, fiber bundles gathered together and interrupted at the affected side. No significant alteration was detected in the number of fiber bundles, but the cross-sectional area of nerve root fibers was reduced. These results suggest that diffusion tensor magnetic resonance imaging-based tractography can be used to quantitatively evaluate nerve root function according to the area and morphology of fiber bundles of nerve roots.

6.
Shanghai Kou Qiang Yi Xue ; 21(3): 317-20, 2012 Jun.
Artigo em Chinês | MEDLINE | ID: mdl-22885495

RESUMO

PURPOSE: To measure the absorbed quantity of Bio-Oss by using dental CT scanning and measuring the variety of the volume of Bio-Oss. METHODS: Nine patients were preformed stage I surgery of dental implants and guided bone regeneration-membrane technique (GBR) simultaneously. These patients were scanned by dental CT at the end of 1-week, 3-month and 6-month after operation, respectively. The measurements of the varied volume of Bio-Oss with dental CT scanning were conducted. Finally the remaining quantity of Bio-Oss in the patients' jaw bone was obtained. RESULTS: The results suggested that the remaining quantity of Bio-Oss was 32.72% ±18.35% at the end of 3-month post operatively and 15.75% ±16.73% at the end of 6-month postoperatively. CONCLUSIONS: It is concluded that there is a decrease in the remaining quantity of Bio-Oss in GBR along with the increase of time. As a kind of osteoconductive material, Bio-Oss can be absorbed and replaced by newly formed bone. Using dental CT scanning to measure the volume of Bio-Oss in man is predictable.


Assuntos
Substitutos Ósseos , Implantação Dentária , Regeneração Óssea , Implantação Dentária Endóssea , Implantes Dentários , Humanos , Masculino , Membranas Artificiais , Minerais
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...