scholarly journals Assessing the SNR Influence in the Estimation of the Mean Frequency of Lower Limbs sEMG Signals

2018 ◽  
Vol 16 (8) ◽  
pp. 2108-2114 ◽  
Author(s):  
Andres Rojas ◽  
Angel Farfan ◽  
Esteban Mora ◽  
Luis I. Minchala ◽  
Sara Wong
Keyword(s):  
Lower Limbs ◽  
Mean Frequency ◽  
The Mean ◽  
Semg Signals

scholarly journals Prevalência de lesões em atletas da seleção brasileira de taekwondo

2019 ◽  
Vol 17 (2) ◽  
pp. 161-168
Author(s):  
Daniela Gallon Correa ◽  
Anna Raquel Silveira Gomes ◽  
Giovanni Luigi Manso Gnata ◽  
Roderley Reis Cirino ◽  
Vinicius Podbevsek Coutinho ◽  
...  
Keyword(s):  
Lower Limbs ◽  
Mean Frequency ◽  
National Team ◽  
Anatomical Region ◽  
Injury Mechanisms ◽  
The Mean ◽  
And Training

Objetivo: Identificar a prevalência de lesões em atletas adultos da seleção brasileira masculina de taekwondo. Métodos: Onze atletas com idade média de 24±4,5 anos responderam dois questionários semiestruturados e questões objetivas para investigação dos seguintes aspectos: idade; tempo de prática; graduação; região anatômica afetada em treinos e competições; mecanismos de lesão durante campeonato e treinamento; periodização; duração e frequência de treinos e competições no último ano; e se houve interrupção da prática de taekwondo decorrente das lesões. Resultados: A contusão foi o tipo mais frequente e os membros inferiores os mais acometidos; 27% relataram interrupção do treinamento maior ou igual a 1 dia de treino e/ou competição, em decorrência das lesões. A frequência média de competições; frequência semanal de treinamento e meses de treinamento por ano foram: 6±3 vezes/ano; 5±1 dias/semana e 10±3 meses/ano. Conclusão: A lesão mais prevalente dos atletas da seleção brasileira de taekwondo foi a contusão na coxa e no antebraço decorrente de golpe do adversário durante campeonatos. ABSTRACT. Injurie’s prevalence in athletes of the Brazilian national team of taekwondo. Objective: Identify the prevalence of injuries in male adults’ athletes of the Brazilian team of taekwondo. Methods: Eleven athletes aged 24±4.5 years answered two semi-structured questionnaires and questions for investigation of the following aspects: age; time practicing; taekwondo’s graduation; anatomical region injured during training and/or competitions; injury mechanisms during competitions and training; periodization; duration and frequency of training and competitions in the last year; and if there was interruption of taekwondo practice due to injuries. Results: The contusion was the most frequent injury, and the lower limbs were most affected, 27% reported discontinuation of training and/or competition greater than or equal to 1 day due to injuries. The mean frequency of competitions; training days per week and training months per year were: 6±3 times/year; 5±1 days/week and 10±3 months/year. Conclusion: The most prevalent injury of athletes from the Brazilian team of taekwondo was the contusion in the thigh and forearm during competitions.

35Cl NQR Spectroscopy on Salts and Molecular Compounds of Trichloroacetic Acid

1986 ◽  
Vol 41 (1-2) ◽  
pp. 215-224 ◽  
Author(s):  
Winfried Fichtner ◽  
Axel Markworth ◽  
Norbert Weiden ◽  
Alarich Weiss
Keyword(s):  
Frequency Shift ◽  
Temperature Dependence ◽  
Linear Relation ◽  
Trichloroacetic Acid ◽  
Mean Frequency ◽  
35Cl Nqr ◽  
The Mean ◽  
Molecular Compounds

The temperature dependence of salts M(1)H(Cl3CCOO)2 and molecular compounds of trichloroacetic acid with amines and benzaldehydes, TCA · X, was studied,The data fit rather well to the known dependence of the mean frequency shift Δ <v(35Cl)> on the pkadifference of X with respect to TCA. A linear relation is observed between the bleaching out temperature Tb of the 35Cl NQR lines and Δ <v(35Cl)> for M(1)H(Cl3CCOO)2 and for TCA · X, X = benzaldehydes.

scholarly journals Improving peripherally inserted central catheter appropriateness and reducing device-related complications: a quasiexperimental study in 52 Michigan hospitals

2021 ◽  
pp. bmjqs-2021-013015
Author(s):  
Vineet Chopra ◽  
Megan O'Malley ◽  
Jennifer Horowitz ◽  
Qisu Zhang ◽  
Elizabeth McLaughlin ◽  
...  
Keyword(s):  
Central Line ◽  
Hospital Performance ◽  
Policy Implications ◽  
Change Point Analysis ◽  
Absolute Difference ◽  
Peripherally Inserted Central Catheter ◽  
Central Catheter ◽  
Appropriateness Criteria ◽  
Mean Frequency ◽  
The Mean

BackgroundThe Michigan Appropriateness Guide for Intravenous Catheters (MAGIC) provides evidence-based criteria for peripherally inserted central catheter (PICC) use. Whether implementing MAGIC improves PICC appropriateness and reduces complications is unknown.MethodsA quasiexperimental study design to implement MAGIC in 52 Michigan hospitals was used. Data were collected from medical records by trained abstractors. Hospital performance on three appropriateness criteria was measured: short-term PICC use (≤5 days), use of multilumen PICCs and PICC placement in patients with chronic kidney disease. PICC appropriateness and device complications preintervention (January 2013 to December 2016) versus postintervention (January 2017 to January 2020) were compared. Change-point analysis was used to evaluate the effect of the intervention on device appropriateness. Logistic regression and Poisson models were fit to assess the association between appropriateness and complications (composite of catheter occlusion, venous thromboembolism (VTE) and central line-associated bloodstream infection (CLABSI)).ResultsAmong 38 592 PICCs, median catheter dwell ranged from 8 to 56 days. During the preintervention period, the mean frequency of appropriate PICC use was 31.9% and the mean frequency of complications was 14.7%. Following the intervention, PICC appropriateness increased to 49.0% (absolute difference 17.1%, p<0.001) while complications decreased to 10.7% (absolute difference 4.0%, p=0.001). Compared with patients with inappropriate PICC placement, appropriate PICC use was associated with a significantly lower odds of complications (OR 0.29, 95% CI 0.25 to 0.34), including decreases in occlusion (OR 0.25, 95% CI 0.21 to 0.29), CLABSI (OR 0.61, 95% CI 0.46 to 0.81) and VTE (OR 0.40, 95% CI 0.33 to 0.47, all p<0.01). Patients with appropriate PICC placement had lower rate of complications than those with inappropriate PICC use (incidence rate ratio 0.987, 95% CI 0.98 to 0.99, p<0.001).ConclusionsImplementation of MAGIC in Michigan hospitals was associated with improved PICC appropriateness and fewer complications. These findings have important quality, safety and policy implications for hospitals, patients and payors.

scholarly journals Clinical Anatomy of the Posterior Meniscofemoral Ligament of Wrisberg: An Original MRI Study, Meta-analysis, and Systematic Review

2021 ◽  
Vol 9 (2) ◽  
pp. 232596712097319
Author(s):  
Przemysław A. Pękala ◽  
Dominik P. Łazarz ◽  
Mateusz A. Rosa ◽  
Jakub R. Pękala ◽  
Adam Baginski ◽  
...  
Keyword(s):  
Systematic Review ◽  
Quality Assessment ◽  
Meta Analysis ◽  
Lateral Meniscus ◽  
Lower Limbs ◽  
Clinical Anatomy ◽  
Extensive Literature ◽  
Anatomic Structure ◽  
Meniscofemoral Ligament ◽  
The Mean

Background: The posterior meniscofemoral ligament (pMFL) of Wrisberg attaches to the posterior horn of the lateral meniscus and the lateral intercondylar aspect of the medial femoral condyle and passes posteriorly to the posterior cruciate ligament (PCL). The pMFL plays a role in recovery after PCL injuries and offers stability to the lateral meniscus, promoting normal knee function. Purpose/Hypothesis: The aim of the magnetic resonance imaging (MRI) arm of this study was to evaluate the prevalence of the pMFL in Polish patients. The purpose of the systematic review and meta-analysis was to evaluate the clinical relevance of the pMFL in knee surgery. It was hypothesized that extensive variability exists in reports on the prevalence, function, and clinical significance of the pMFL. Study Design: Cross-sectional study and systematic review; Level of evidence, 3. Methods: A retrospective MRI investigation was conducted on 100 randomly selected lower limbs of Polish patients (56 male, 44 female) performed in 2019 to determine the prevalence of the pMFL. Additionally, an extensive literature search of major online databases was performed to evaluate all reported data on the pMFL. Assessments of article eligibility and data extraction were completed independently by 2 reviewers, and all disagreements were resolved via a consensus. A quality assessment of the included articles was performed using the Anatomical Quality Assessment tool. Results: In the MRI arm of this study, the pMFL was observed in 73 of the 100 limbs. In the meta-analysis, 47 studies were included, totaling 4940 lower limbs. The pooled prevalence of the pMFL was found to be 70.4% (95% CI, 63.4%-76.9%); the mean length was 27.7 mm (95% CI, 24.8-30.5 mm) and the mean widths were 4.5, 6.1, and 4.1 mm for the meniscal and femoral attachments and midportion, respectively. The mean pMFL thickness was 2.3 mm (95% CI, 1.8-2.7 mm). Conclusion: Despite the variability in the literature, the pMFL was found to be a prevalent and large anatomic structure in the knee joint. The shared features of this ligament with the PCL necessitate the consideration of its value in planning and performing arthroscopic procedures of the knee.

Evaluation of Analgesic and Sedative Effects of Ketamine Infusion against Intravenous Morphine in Relieving Fracture Pain of Long or Short Bones of Upper and Lower Limbs

2021 ◽  
Vol 15 (6) ◽  
pp. 1807-1811
Author(s):  
Meysam Moezi ◽  
Hassan Motamed ◽  
Mohammad Ali Fahimi ◽  
Azam Khalighi
Keyword(s):  
Emergency Department ◽  
Lower Limbs ◽  
Ketamine Infusion ◽  
Disturbed Sleep ◽  
Limb Trauma ◽  
Level Of Consciousness ◽  
Sedative Effects ◽  
Intravenous Morphine ◽  
Minimum Age ◽  
The Mean

Introduction and Purpose: The importance of pain control in patients with limb trauma in the emergency department and its complications is the main issue in post-emergency care and plays an important role in accelerating the improvement of patients' general status. Therefore, the present study aimed to evaluate the analgesic and sedative effects of ketamine infusion against intravenous morphine in relieving fracture pain of long or short bones in the upper and lower limbs. Materials and Methods: We examined the effect of ketamine and morphine as ketamine infusion at a dose of 0.4 mg/kg/IV/10min and intravenous morphine at a dose of 0.1 mg/kg/IV in patients aged 18-65 years with limb trauma who visited the hospital emergency department. We also compared the duration of analgesia, the amount of pain relief according to the Visual Analogue Scale (VAS) in each of the drugs and complications of the above methods, including apnea, bradycardia, tachycardia, decreased level of consciousness, nausea, vomiting, hypertension and hypotension, seizures, and disturbed sleep, and mentioned the preferred method. Results: In the study, we studied 120 patients, 60 of whom received ketamine and 60 received morphine. The mean age of patients was 13.02±13.67 years with a minimum age of 19 years and a maximum age of 70 years, and 89(74.2%) patients were male. There was not any difference between ketamine and morphine in the factors at different times. Conclusion: The results indicated that the potency of low-dose ketamine in relieving pain in patients was very similar to morphine. Keywords: Bone fracture; Ketamine; Morphine.

scholarly journals SPRAY APPLICATIONS TO TOMATO PLANTS IN GREENHOUSES. PART 2: EFFECT OF SPRAY LANCE TYPE

2009 ◽  
Vol 40 (3) ◽  
pp. 49 ◽  
Author(s):  
Emanuele Cerruto ◽  
Giuseppe Emma ◽  
Giuseppe Manetto
Keyword(s):  
Block Design ◽  
The Body ◽  
Lower Limbs ◽  
Internal Layer ◽  
Protective Equipment ◽  
Body Parts ◽  
Tomato Plants ◽  
Application Rates ◽  
Two Factors ◽  
The Mean

The present paper reports the results of some spray application trials carried out in a greenhouse with full developed tomato plants to assess foliar deposition, ground losses, and dermal operator exposure when using handheld high pressure spray lances and when walking backwards during treatments. Two spray lance types (conventional with one nozzle and Yamaho C-6 with two steel nozzles, each with two orifices) and two working pressures (10 and 20 bar) were taken into consideration. An experimental design with two factors (spray lance and pressure) was adopted, arranged according to a randomised block design with three replicates. Volume application rates ranged from 775 up to 1252 L/ha, but all data were normalised to 1000 L/ha. The results showed no statistically significant differences in the mean foliar deposition between the two spray lances and the two working pressures. However, the higher pressure improved significantly the deposit into the internal layer of the canopy (+57%), whereas the Yamaho C-6 spray lance produced a higher deposit on the external layer at any pressure. The greatest differences between external and internal layer were mainly concentrated in the middle and high parts of the canopy, where there were 55 007_Cerruto(557)_49 18-11-2009 11:59 Pagina 55 the highest values of LAI and number of foliar layers. The fraction of the applied volume rate on the ground was on average 25 percent and it was affected only by the pressure value: it increased from 21.7 to 28.7 percent when the pressure increased from 10 to 20 bar, due mainly to the contribution of the conventional spray lance under the sprayed twin-rows. Finally, neither pressure nor spray lance type affected significantly the dermal operator exposure. Upper limbs accounted for 51 percent of the total exposure, while trunk and lower limbs accounted for 24 percent each. The body parts more exposed were the left arm and the hands, but also relatively high was the deposit on the respirator, so operators should ever wear appropriate personal protective equipment.

scholarly journals Gaussian Process Autoregression for Joint Angle Prediction Based on sEMG Signals

2021 ◽  
Vol 9 ◽  
Author(s):  
Jie Liang ◽  
Zhengyi Shi ◽  
Feifei Zhu ◽  
Wenxin Chen ◽  
Xin Chen ◽  
...  
Keyword(s):  
Gaussian Process ◽  
Probabilistic Model ◽  
Autoregressive Model ◽  
Process Model ◽  
Joint Angle ◽  
Gaussian Process Model ◽  
The Mean ◽  
Test Scenarios ◽  
Semg Signals ◽  
Non Parametric

There is uncertainty in the neuromusculoskeletal system, and deterministic models cannot describe this significant presence of uncertainty, affecting the accuracy of model predictions. In this paper, a knee joint angle prediction model based on surface electromyography (sEMG) signals is proposed. To address the instability of EMG signals and the uncertainty of the neuromusculoskeletal system, a non-parametric probabilistic model is developed using a Gaussian process model combined with the physiological properties of muscle activation. Since the neuromusculoskeletal system is a dynamic system, the Gaussian process model is further combined with a non-linear autoregressive with eXogenous inputs (NARX) model to create a Gaussian process autoregression model. In this paper, the normalized root mean square error (NRMSE) and the correlation coefficient (CC) are compared between the joint angle prediction results of the Gaussian process autoregressive model prediction and the actual joint angle under three test scenarios: speed-dependent, multi-speed and speed-independent. The mean of NRMSE and the mean of CC for all test scenarios in the healthy subjects dataset and the hemiplegic patients dataset outperform the results of the Gaussian process model, with significant differences (p &lt; 0.05 and p &lt; 0.05, p &lt; 0.05 and p &lt; 0.05). From the perspective of uncertainty, a non-parametric probabilistic model for joint angle prediction is established by using Gaussian process autoregressive model to achieve accurate prediction of human movement.

scholarly journals INDIRECT DECOMPRESSION BY LATERAL FUSION: ANALYSIS OF SAGITAL ALIGNMENT

2021 ◽  
Vol 20 (1) ◽  
pp. 50-54
Author(s):  
Thyago Guirelle Silva ◽  
Rodrigo Augusto do Amaral ◽  
Raphael Rezende Pratali ◽  
Luiz Pimenta
Keyword(s):  
Magnetic Resonance ◽  
Pelvic Incidence ◽  
Magnetic Resonance Images ◽  
Cross Sectional Area ◽  
Disc Height ◽  
Lower Limbs ◽  
Sectional Area ◽  
Cross Sectional ◽  
Indirect Decompression ◽  
The Mean

ABSTRACT Objective: To verify the effectiveness of indirect decompression after lateral access fusion in patients with high pelvic incidence. Methods: A retrospective, non-comparative, non-randomized analysis of 22 patients with high pelvic incidence who underwent lateral access fusion, 11 of whom were male and 11 female, with a mean age of 63 years (52-74), was conducted. Magnetic resonance exams were performed within one year after surgery. The cross-sectional area of the thecal sac, anterior and posterior disc heights, and bilateral foramen heights, measured pre- and postoperatively in axial and sagittal magnetic resonance images, were analyzed. The sagittal alignment parameters were measured using simple radiographs. The clinical results were evaluated using the ODI and VAS (back and lower limbs) questionnaires. Results: In all cases, the technique was performed successfully without neural complications. The mean cross-sectional area increased from 126.5 mm preoperatively to 174.3 mm postoperatively. The mean anterior disc height increased from 9.4 mm preoperatively to 12.8 mm postoperatively, while the posterior disc height increased from 6.3 mm preoperatively to 8.1 mm postoperatively. The mean height of the right foramen increased from 157.3 mm in the preoperative period to 171.2 mm in the postoperative period and that of the left foramen increased from 139.3 mm in the preoperative to 158.9 mm in the postoperative. Conclusions: This technique is capable of correcting misalignment in spinal deformity, achieving fusion and promoting the decompression of neural elements. Level of evidence III; Retrospective study.

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