Publicações

@article{pmid29205218,

title = {A longitudinal assessment of myoelectric activity, postural sway, and low-back pain during pregnancy},

author = {Luciana Sobral Moreira and Leonardo Abdala Elias and Adriane B Gomide and Marcus Fraga Vieira and Waldemar N DO Amaral},

issn = {1509-409X},

year  = {2017},

date = {2017-01-01},

urldate = {2017-01-01},

journal = {Acta Bioeng Biomech},

volume = {19},

number = {3},

pages = {77--83},

abstract = {PURPOSE: The present study aimed at investigating the control of upright quiet standing in pregnant women throughout pregnancy, and whether low-back pain exerts influence on this motor task.



METHODS: Myoelectric signals from postural muscles and stabilometric data were collected from 15 non-pregnant and 15 pregnant women during upright quiet standing. Electromyogram envelopes and center of pressure metrics were evaluated in the control group, as well as in pregnant women in their first and third trimester of pregnancy. A correlation analysis was performed between the measured variables and a low-back pain disability index.



RESULTS: Pregnant women exhibited a decreased maximum voluntary isometric activity for all postural muscles evaluated. Additionally, the activity of lumbar muscles during the postural task was significantly higher in the pregnant women in comparison to the non-pregnant controls. The soleus muscle maintained its activity at the same level as the gestation progressed. Higher postural oscillations were observed in the anteroposterior direction while mediolateral sway was reduced in the third trimester of pregnancy. No correlation was detected between the lowback pain disability index and neuromechanical variables.



CONCLUSION: This study provides additional data regarding the functioning and adaptations of the postural control system during pregnancy. Also, we provide further evidence that postural control during quiet standing cannot be used to predict the occurrence of low-back pain. We hypothesize that the modifications in the neural drive to the muscles, as well as in postural sway may be related to changes in the biomechanics and hormonal levels experienced by the pregnant women.},

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pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {ADHD and Cerebellar Vermis Tumor: DTI Analysis of an Incidental Finding},

author = {Maurício Martins Baldissin and Edna Marina de Souza},

doi = {10.1055/s-0036-1588000},

year  = {2016},

date = {2016-09-05},

urldate = {2016-09-05},

journal = {Arquivos Brasileiros de Neurocirurgia: Brazilian Neurosurgery},

volume = {35},

issue = {03},

pages = {239-243},

abstract = {The increase in number of magnetic resonance imaging (MRI) scans for investigation of neurological diseases in childhood and adolescence leads to increase of incidental findings of central nervous system (CNS) tumors in these stages of life. Among MRI techniques, diffusion-weighted imaging (DWI) and diffusion tensor imaging (DTI) have been increasingly used in brain studies. These images are based on random motion of water molecules in the body, which can change depending on constitution and geometry of biological tissues, as well as the existence of pathologies.



This paper reports the use of DTI and DWI to evaluation of a CNS tumor incidentally detected in a patient diagnosed previously with Attention Deficit Hyperactivity Disorder (ADHD). He was diagnosed at age 9 and has been treated with medicines and psycho-pedagogical therapies. At age 15 a MRI detected a cerebellar vermis tumor with a volume of 2 cm3. Due to parental decision, the patient did not undergo any surgical intervention. During the follow-up period we did not observe significant changes in tumor size or diffusion directions in the tumor and surrounding brain tissues. The main brain tracts presented normal diffusion patterns, both in terms of size and geometry. The DTI analysis showed that lesion was quite homogeneous and isotropic, with no significant restriction of diffusion. There also were no significant diffusion pattern changes in other regions of the brain which possibly could be related to ADHD. So, given the characteristics of lesion and the patient's clinical symptoms, it cannot be directly related to ADHD.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Giesbrecht2015,

title = {Recursive Immuno-Inspired Algorithm for Time Variant Discrete Multivariable Dynamic System State Space Identification},

author = {Mateus Giesbrecht and Celso Pascoli Bottura},

doi = {10.4018/ijncr.2015040104},

issn = {1947-9298},

year  = {2015},

date = {2015-04-00},

volume = {5},

number = {2},

pages = {69--100},

publisher = {IGI Global},

abstract = {
In this paper a recursive immuno inspired algorithm is proposed to identify time variant discrete multivariable dynamic systems. The main contribution of this paper has as starting point the idea that a multivariable dynamic system state space model can be seen as a point in a space defined by all possible matrices quadruples that define a state space model. With this in mind, the time variant discrete multivariable dynamic system modeling is transformed in an optimization problem and this problem is solved with an immuno inspired algorithm. To do that the inputs given to the system and the resulting outputs are divided in small sets containing data from small time intervals. These sets are defined as time windows, and for each window an immuno inspired optimization algorithm is applied to find the state space model that better represents the system at that time interval. The initial candidate solutions of each time interval are the ones of the last interval. The immuno inspired algorithm proposed in this paper has some modifications to the original Opt-AINet algorithm to deal with the constraints that are natural from the system identification problem and these modifications are also contributions of this paper. The method proposed in this paper was applied to identify a time variant benchmark system, resulting in a time variant model. The outputs estimated with this model are closer to the benchmark system outputs than the outputs estimated with models obtained by other known identification methods. The Markov parameters of the variant benchmark system are also reproduced by the time variant model found with the new method.
},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{pmid25395252,

title = {Electrocardiogram, heart movement and heart rate in the awake gecko (Hemidactylus mabouia)},

author = {Carina M Germer and Juliana M Tomaz and Ana F Carvalho and Rosana A Bassani and José W M Bassani},

doi = {10.1007/s00360-014-0873-5},

issn = {1432-136X},

year  = {2015},

date = {2015-01-01},

journal = {J Comp Physiol B},

volume = {185},

number = {1},

pages = {111--118},

abstract = {The electrocardiogram (ECG) is the simplest and most effective non-invasive method to assess the electrical activity of the heart and to obtain information on the heart rate (HR) and rhythm. Because information on the HR of very small reptiles (body mass <10 g) is still scarce in the literature, in the present work we describe a procedure for recording the ECG in non-anesthetized geckos (Hemidactylus mabouia, Moreau de Jonnès, 1818) under different conditions, namely manual restraint (MR), spontaneous tonic immobility (TI), and in the non-restrained condition (NR). In the gecko ECG, the P, QRS and T waves were clearly distinguishable. The HR was 2.83 ± 0.02 Hz under MR, which was significantly greater (p < 0.001) than the HR under the TI (1.65 ± 0.09 Hz) and NR (1.60 ± 0.10 Hz) conditions. Spontaneously beating isolated gecko hearts contracted at 0.84 ± 0.03 Hz. The in vitro beating rate was affected in a concentration-dependent fashion by adrenoceptor stimulation with noradrenaline, as well as by the muscarinic cholinergic agonist carbachol, which produced significant positive and negative chronotropic effects, respectively (p < 0.001). To our knowledge, this is the first report on the ECG morphology and HR values in geckos, particularly under TI. The methodology and instrumentation developed here are useful for non-invasive in vivo physiological and pharmacological studies in small reptiles without the need of physical restraint or anesthesia.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Medical equipment classification according to corrective maintenance data: a strategy based on the equipment age},

author = {Natália Ferreira Oshiyama and Ana Carolina Silveira and Rosana Almada Bassani and José Wilson Magalhães Bassani},

doi = {https://doi.org/10.4322/rbeb.2013.045},

year  = {2014},

date = {2014-04-23},

journal = {Rev. Bras. Eng. Bioméd},

volume = {30},

issue = {1},

abstract = {Decision-making on medical equipment management is a daily task for clinical engineers, but it may prove difficult to easily extract relevant information from the large amount of data from computerized maintenance management systems. This article describes a simple method of medical equipment classification based on corrective maintenance indicators. METHODS: Three indicators were calculated based on the number of events, duration and cost of corrective maintenance. Three classes were defined according to the indicator values of different equipment ages: class A for 0-4 years, class B for 5-9 years, and class C for equipment older than 10 years. The method was applied to 2,134 pieces of equipment from the Health Service system of the University of Campinas. RESULTS: From the total, 51.7% of the equipment were classified as C, 4.2% as B and 44.1% as A. The infusion pump for general use was the type of equipment of which most units were in the C class (84.7%), even though almost 50% of them were acquired within less than 9 years, and would thus be expected to be classified as A and B. Among the pumps in class C, 39.5% were from a single manufacturer, although the equipments were acquired recently. CONCLUSION: The developed classification may be an important tool for raising alerts about equipment more prone to maintenance problems, as well as for identification of equipments with acceptable maintenance history, supporting decision-making on equipment replacement.},

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pubstate = {published},

tppubtype = {article}

}

@article{pmid24140800,

title = {Muscarinic stimulation and pinacidil produce similar facilitation of tachyarrhythmia induction in rat isolated atria},

author = {Nivaldo Zafalon and Natália Ferreira Oshiyama and José Wilson Magalhães Bassani and Rosana Almada Bassani},

doi = {10.1016/j.yjmcc.2013.10.004},

issn = {1095-8584},

year  = {2013},

date = {2013-12-01},

urldate = {2013-12-01},

journal = {J Mol Cell Cardiol},

volume = {65},

pages = {120--126},

abstract = {Atrial tachyarrhythmias, the most common type of cardiac arrhythmias, are associated with greater stroke risk. Muscarinic cholinergic agonists have been shown to facilitate atrial tachyarrhythmia maintenance in the absence of cardiac disease. This has been attributed to action potential shortening, which enhances myocardial electrical anisotropy, and thus creates a substrate for reentrant excitation. In this study, we describe a similar effect of the ATP-sensitive K(+) channel (KATP) opener pinacidil on tachyarrhythmia induction in isolated rat atria. Pinacidil, which activates a weakly inwardly-rectifying current in isolated atrial myocytes, enhanced arrhythmia induction in the right and left atria. This effect was abolished by the KATP blocker glibenclamide, but not by atropine, which rules out a possible indirect effect due to stimulation of acetylcholine release. However, pinacidil attenuated carbachol-induced tachyarrhythmia facilitation, which may indicate that the action of these agonists converges to a common cellular mechanism. Both agonists caused marked action potential shortening in isolated atrial myocytes. Moreover, during arrhythmia in the presence of pinacidil and carbachol, the atrial vectorelectrographic patterns were similar and consistent with reentrant propagation of the electrical activity. From these results, we conclude that the KATP channel opening is pro-arrhythmic in atrial tissue, which may pose as an additional risk in the scenario of myocardial hypoxia. Moreover, the similarity of the electrophysiological effects of pinacidil and carbachol is suggestive that the sole increase in background K(+) conductance is sufficient for atrial tachyarrhythmia facilitation.},

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pubstate = {published},

tppubtype = {article}

}

@article{pmid22407498,

title = {Medical equipment classification: method and decision-making support based on paraconsistent annotated logic},

author = {Natália Ferreira Oshiyama and Rosana Almada Bassani and Itala M L D'Ottaviano and José Wilson Magalhães Bassani},

doi = {10.1007/s11517-012-0888-6},

issn = {1741-0444},

year  = {2012},

date = {2012-04-01},

urldate = {2012-04-01},

journal = {Med Biol Eng Comput},

volume = {50},

number = {4},

pages = {395--402},

abstract = {As technology evolves, the role of medical equipment in the healthcare system, as well as technology management, becomes more important. Although the existence of large databases containing management information is currently common, extracting useful information from them is still difficult. A useful tool for identification of frequently failing equipment, which increases maintenance cost and downtime, would be the classification according to the corrective maintenance data. Nevertheless, establishment of classes may create inconsistencies, since an item may be close to two classes by the same extent. Paraconsistent logic might help solve this problem, as it allows the existence of inconsistent (contradictory) information without trivialization. In this paper, a methodology for medical equipment classification based on the ABC analysis of corrective maintenance data is presented, and complemented with a paraconsistent annotated logic analysis, which may enable the decision maker to take into consideration alerts created by the identification of inconsistencies and indeterminacies in the classification.},

keywords = {},

pubstate = {published},

tppubtype = {article}

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@article{nokey,

title = {[No title]},

url = {https://doi.org/10.1007/s11517-023-02868-1},

doi = {https://doi.org/10.1007/s11517-023-02868-1},

keywords = {},

pubstate = {published},

tppubtype = {article}

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@article{nokey,

title = {[No title]},

doi = {https://doi.org/10.1007/s11517-023-02868-1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}