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Survey of Saccadic Parameters Using Videonystagmography in Patients with Idiopathic Parkinson's Disease and Normal Subjects  [PDF]
Reza Hosseinabadi,Abdorreza Sheibanizadeh,Dr.Gholamali Shahidi,Dr. Arash Gholamipur
Audiology , 2008,
Abstract: Background and Aim: Patients with Parkinson’s disease manifest oculomotor abnormalities. This is the consequence of basal ganglia impairment. The most common abnormalities include increased saccade latency, hypometric saccades and decreased saccade velocity. The purpose of this study was comparison of saccadic parameters using videonystagmography in patients with idiopathic Parkinson’s disease and normal subjects.Materials and Methods: In this cross sectional study, saccadic movements were investigated in thirty patients with idiopathic Parkinson’s disease and thirty age matched subjects were 35-70 years old. Saccade latency, velocity and accuracy were quantitatively analyzed. Results: Results of this study indicated increased saccade latency, reduction of saccade velocity and accuracy in patients with Parkinson’s disease(P<0.001).Conclusion: This study showed that patients with Parkinson’s disease manifest saccadic deficits. This suggests dopaminergic control of these ocular movements.
Ureteral approach in Wertheim surgery: a facilitating maneuver
Ayrton de Andréa Filho,Jose Carlos Menegocci,Luiza Bassi,Marcio Nanamura
Einstein (S?o Paulo) , 2007,
Abstract: Objective: The aim of the present study was to assess the resultof a single maneuver facilitating ureteral dissection. Methods: Onehundred and eleven patients underwent a modified procedure of theWertheim-Meigs technique, from February 1995 to December 2003.A detailed description of the surgery is provided. Results: The surgerydid not last long and no urinary fistulas were observed. Bleeding wassimilar to the standard procedure. Conclusion: The new maneuverfor ureter dissection was successful and facilitated the teaching ofradical hysterectomy.
The effects of ‘recruitment’ maneuver on laparoscopic colon surgery  [PDF]
Ufuk Topuz,Ziya Saliho?lu,Adem Karata?,Ay?enur Yeksan
Medical Journal of Bakirk?y , 2010,
Abstract: Objective: During general anesthesia and iatrogenic pneumoperitoneum practice, some factors resulting in formation of atelectasia such as increased intra-abdominal pressure, decreased functional residual capacity and lung compliance can affect the respiratory system therefore due to the oxygenation and arterial blood gas parameters. “Recruitment” maneuver may be effective in prevention of atelectesia and improvement of oxygenation. The aim of this study is observing the effect of recruitment maneuver on ventilation mechanics and oxygenation. Material and Methods: In this study 32 adult candidates for laparoscopic colon surgery were observed under standard anesthesia. After induction, to create pneumoperitoneum with CO2 ow, the insu ator was set at the rate of 2 L/min. During the procedure the intra-abdominal pressure was kept constant at 12mm-Hg. The subjects randomly were divided into two groups. In recruitment group (Group Recruitment, n=16) we stopped ventilation after desu ation and applied 45 cm H2O CPAP for 15 seconds and then following 45 seconds of ventilation we repeated the maneuver. In control group (Group Control, n=16) only mechanic ventilation but nothing else was applied. For assessment of ventilation mechanics, the dynamic compliance (Cdyn) was measured; just 10 minutes after intubation in supine position (induction, 1), 10 minutes after creating pneumoperitoneum (insu ation-horizontal,2), 10 minutes after putting the patient into Fowler position at 30° (Fowler,3), just before desu ation at 30° Trendelenburg position (Trende lenburg, 4) and after desu ation at supine position (desu ation-horizontal,5). Simultaneous arterial blood gas analysis was performed at first, second and fifth measurements. Results: Cdyn measurements at different positions were similar when two groups were compared to each other. The lowest value was measured at Trendelenburg position. It was detected as 29.2 ± 6.3 in recruitment group and 27.8 ± 8.2 in control group. Partial oxygen pressure values were better in recruitment group. The partial oxygen pressure measurements were 227.3±77.4, 180.5±74.4, 192.5±39.8 mm-Hg at 1st, 2nd and 5th measurements respectively for control group while they were 228.9±77.5, 222.6±63.6 and 218.5±48.7 mm Hg for recruitment group. Conclusion: We can suggest that the recruitment maneuver is effective for better oxygenation in laparoscopic colon surgery/interventions.
Eletronistagmografia versus videonistagmografia
Ganan?a, Maurício Malavasi;Caovilla, Heloísa Helena;Ganan?a, Fernando Freitas;
Brazilian Journal of Otorhinolaryngology , 2010, DOI: 10.1590/S1808-86942010000300021
Abstract: electronystagmography (eng) and videonystagmography (vng) are eye movement recording methods used for the evaluation of balance disorders. aim: to compare literature information on the similarities, differences, advantages e disadvantages between eng and vng. materials and methods: review of the scientific literature. results: eng and vng are very helpful methods for evaluating balance disorders, due to their capacity to recognize signs of peripheral or central vestibular dysfunction and to pinpoint the side of the lesion. major advantages of vng are related to calibration, temporospatial resolution, and recording of horizontal, vertical and torsional eye movements. conclusion: vng is a new technology that presents advantages in the evaluation of eye movements; however, despite its disadvantages, eng is still considered a valuable test in the clinical setting
Epley's Maneuver in Benign Paroxysmal Positional Vertigo: Series of Cases Reports  [cached]
Marchiori, Luciana Lozza de Moraes,Melo, Juliana Jandre,Romagnoli, Caroline Ravaghani,Oliveira,Thaís Butieri de
International Archives of Otorhinolaryngology , 2011,
Abstract: Introduction: Benign paroxysmal positional vertigo (BPPV) is probably the most common cause of vertigo in women. Objective: To report the result of Epley's maneuver when treating BPPV patients. Method: Study of a series of 9-month-long cases of five female individuals aged between 46 and 64 with BPPV, who were submitted to Epley's maneuver at a scholar clinics, having the positive Dix-Hallpike maneuver at the first consultation as an inclusion criterion, and evaluations were repeated in a six and nine-month term. Results: Only one Epley's maneuver, as the only therapeutic procedure, was enough to eliminate nystagmus and positional vertigo in 4 patients, who did not show a positive Dix-Hallpike maneuver in the two reevaluations performed. Only one patient showed BPPV in the first reevaluation of the study term, and nystagmus reoccurred in the second evaluation only. Conclusion: Epley's repositioning maneuver proved to be a simple and effective BPPV treatment method for this study's patients at length.
Use of Muller's maneuver in the evaluation of patients with sleep apnea: literature review
Soares, Maria Claudia Mattos;Sallum, Ana Carolina Raposo;Gon?alves, Michele Themis Moraes;Haddad, Fernanda Louise Martinho;Gregório, Luís Carlos;
Brazilian Journal of Otorhinolaryngology , 2009, DOI: 10.1590/S1808-86942009000300024
Abstract: sleep apnea-hypopnea syndrome was described twenty years ago, and since then there have been doubts and controversies regarding it. fiberoptic nasopharyngoscopy with muller's maneuver, first described by borowieck and sassin (1983), is among them. aim: careful literature review on muller's maneuver, regarding whether it can predict the sucess of uvulopalatopharyngoplasty, location of upper airway obstruction and severity of the disorder. discussion and literature rewiew: literature has shown that there isn't a consensus about the use of muller's maneuver. in spite of being technically easy, inexpensive and widely used, it is very unespecific and subjective. conclusion: the importance of muller's maneuver in evaluating apneic patients has been questioned, because there are controversies whether it can predict the sucess of uvulopalatopharyngoplasty, location of upper airway obstruction and severity of the disease.
Heading Lock Maneuver Testing of Autonomous Underwater Vehicle  [PDF]
K. Muljowidodo,N. Sapto Adi
Computer Science , 2008,
Abstract: In recent years, Autonomous Underwater Vehicle (UAV) research and development at Bandung Institute of Technology in Indonesia has achieved the testing stage in the field. This testing was still being classified as the early testing, since some of the preliminary tests were carried out in the scale of the laboratory. The paper would discuss the laboratory test and several tests that were done in the field. Discussions were stressed in the procedure and the aim that will be achieved, along with several early results. The testing was carried out in the lake with the area around 8300 Ha and the maximum depth of 50 meters. The location of the testing was chosen with consideration of minimizing the effect of the current and the wave, as well as the location that was not too far from the Laboratory. The type of testing that will be discussed in paper was Heading Lock Maneuver Testing. The vehicle was tested to move with a certain cruising speed, afterwards it was commanded by an arbitrarily selected heading direction. The response and the behavior of the vehicle were recorded as the data produced by the testing.
Spontaneous splenic rupture during Pringle maneuver in liver surgery  [cached]
Jesse M van Buijtenen, Bas Lamme, Erik J Hesselink
World Journal of Hepatology , 2010,
Abstract: During liver resection clamping of the hepato-duodenal ligament (the Pringle maneuver) is performed to reduce intraoperative blood-loss. During this maneuver acute portal hypertension may lead to spontaneous splenic rupture requiring rapid splenectomy in order to control blood loss. We present 2 case of patients with hemorrhage from the spleen during clamping for liver surgery. A review of the literature with an emphasis on the pathophysiology of splenic hemorrhage is presented.
Orbit Maneuver of Spinning Tether via Tidal Force  [PDF]
Hexi Baoyin,Yang Yu,Junfeng Li
Physics , 2014,
Abstract: Recently, the spinning tethered system is regarded as a typical and fundamental space structure attracting great interest of the aerospace engineers, and has been discussed primarily for specific space missions in past decades, including on-orbit capture and propellantless orbit transfer etc. The present work studies the dynamical behaviours of a fast spinning tethered binary system under central gravitational field, and derives principles of the basic laws of orbital maneuver. Considering the characteristics of coupled librational and orbital motions, an averaging method is introduced to deal with the slow-fast system equation, thus a definite equivalent model is derived. The general orbit motion is completely determined analytically, including the orbit geometry, periodicity, conversations and moving region etc. Since the possibility of orbit control using tether reaction has been proved by previous studies, special attention is paid to the transportation mode of angular momentum and mechanical energy between the orbit and libration. The effect of tether length change on the orbit shape is verified both in the averaged model and original model. The results show the orbit angular momentum and mechanical energy can be controlled independently, and the operating principles of tether reactions are derived for special modification of orbit shape.
A New Method to Improve the Maneuver Capability of AUV Integrated Navigation Systems  [cached]
Zhen Guo,Yanling Hao,Feng Sun
Journal of Computers , 2010, DOI: 10.4304/jcp.5.5.757-764
Abstract: The maneuver characteristic of the most commonly used AUV integrated navigation systems was investigated in this paper. After analyzing the error cause of conversional used Kalman filter of SINS/DVL integrated navigation systems in maneuver state, a novel method was proposed which is to use the output of complex navigation systems to revise the SINS in real-time, and an improved adaptive Kalman filter was discussed here to reach the seamless changing of the whole system. The measurement remnant method was introduced to judge whether the bearing change event happened or not. The whole design was aiming to reach the smooth transition between the different motion states and improve the maneuver capability of the AUV navigation system. The simulation results confirms the new approach could restrain the oscillation of Kalman filter in motion changing state and improve the accuracy of the AUV integrated navigation systems.
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