The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
George Jallo - One of the best experts on this subject based on the ideXlab platform.
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Adjustable vs Set-Pressure valves decrease the risk of proximal shunt obstruction in the treatment of pediatric hydrocephalus
Child's Nervous System, 2007Co-Authors: Matthew J. Mcgirt, Donald W. Buck, Daniel Sciubba, Graeme F. Woodworth, Benjamin Carson, Jon Weingart, George JalloAbstract:Introduction The use of programmable shunt valves has increased dramatically in the practice of pediatric hydrocephalus. Despite theoretical advantages, it remains unclear if the use of programmable vs Set-Pressure valves affects shunt outcome. Materials and methods The clinical and radiological records of all pediatric patients undergoing ventriculoperitoneal (VP), ventriculopleural (VPl), and ventriculoatrial (VA) shunt surgery from 2001 to 2004 at an academic institution were reviewed. The association of programmable vs Set-Pressure valves with subsequent shunt revision was assessed by Kaplan–Meier shunt survival plots and log-rank analysis. Results A total of 279 VP, VPl, and VA shunt surgeries were performed on patients with median (interquartile range) age of 4 (1–14) years (161 male, 118 female; 158 communicating, 122 obstructive hydrocephalus). Programmable valves were used in 76 (27%) cases and Set-Pressure valves in 203 (73%). At mean±SD follow-up of 17 ± 13 months, programmable vs Set-Pressure valves were associated with reduced risk of both overall shunt revision [26 (35%) vs 109 (54%); relative risk (RR) (95% CI); 0.61 (0.41–0.91), p = 0.016] and proximal obstruction [9 (12%) vs 58 (28%); RR (95% CI); 0.39 (0.27–0.80), p = 0.006]. There was no difference in distal obstruction [3 (4%) vs 11 (5%) cases], infection [6 (8%) vs 12 (6%) cases], valve obstruction [0 (0%) vs 4 (2%)], or shunt disconnection [2 (3%) vs 1 (1%)] between adjustable and Set-Pressure valves, respectively. Conclusion In our experience, the use of programmable vales was associated with a decreased risk of proximal shunt obstruction and shunt revision. Programmable valves may be preferred in patients frequently experiencing proximal shunt failure. A prospective, controlled study is warranted to evaluate the potential value of adjustable vs Set-Pressure valve systems.
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adjustable vs Set Pressure valves decrease the risk of proximal shunt obstruction in the treatment of pediatric hydrocephalus
Childs Nervous System, 2007Co-Authors: Matthew J. Mcgirt, Daniel Sciubba, Graeme F. Woodworth, Jon Weingart, Donald Buck, Benjamin S Carson, George JalloAbstract:Introduction The use of programmable shunt valves has increased dramatically in the practice of pediatric hydrocephalus. Despite theoretical advantages, it remains unclear if the use of programmable vs Set-Pressure valves affects shunt outcome.
Fan Gaoqi - One of the best experts on this subject based on the ideXlab platform.
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The Design of Constant Pressure Water Supply System Based on ABB Inverter
Procedia Engineering, 2011Co-Authors: Fan GaoqiAbstract:Abstract The inverter constant Pressure water supply system is a more efficient, energy saving solution than traditional way, it is able to saving energy more than 50%.According to performance of head and pipe resistance in specific speed, and the relationship between motor speed and motor frequency, VVVF can realize constant Pressure water supply. This paper introduces a constant Pressure water supply system in which uses ABB's ACS510 both as drive and controller. Practical operation shows, the designed system realized tracking to Set Pressure value, error within permitted. Thinking working 8000 hours one year, the system can reduce 54.4% energy consumption than valve throttling way.
John F Schnelle - One of the best experts on this subject based on the ideXlab platform.
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the minimum data Set Pressure ulcer indicator does it reflect differences in care processes related to Pressure ulcer prevention and treatment in nursing homes
Journal of the American Geriatrics Society, 2003Co-Authors: Barbara M Batesjensen, Mary P Cadogan, Dan Osterweil, Lene Levystorms, Jennifer Jorge, Nahla R Alsamarrai, Valena Grbic, John F SchnelleAbstract:Objectives: To determine whether nursing homes (NHs) that score in the extreme quartiles of Pressure ulcer (PU) prevalence as reported on the Minimum Data Set (MDS) PU quality indicator provide different PU care. Design: Descriptive, cohort. Setting: Sixteen NHs. Participants: Three hundred twenty-nine NH residents at risk for PU development as determined by the PU Resident Assessment Protocol of the MDS. Measurements: Sixteen care process quality indicators (10 specific to PU care processes, five related to nutrition, and one related to incontinence management) were scored using medical record data, direct human observation, interviews, and data from wireless thigh movement monitors. Results: There were no differences between homes with low- and high-PU prevalence rates reported on the MDS PU quality indicator on most care processes. NHs with high PU prevalence rates used Pressure-reduction surfaces more frequently and were better at documentation of four wound characteristics when PUs were present. No measure of PU care processes was better in low-PU NHs. Neither low- nor high-PU prevalence NHs routinely repositioned residents every 2 hours, even though 2-hour repositioning was documented in the medical record for nearly all residents. Conclusion: The assumption that homes with fewer PUs and thus low PU prevalence according to the MDS PU quality indicator are providing better PU care was not supported in this sample. NHs that scored low on the MDS PU quality indicator did not provide significantly better care than NHs that scored high. All NHs could improve PU prevention, as evidenced by the poor performance on prevention care processes by low- and high-PU NHs. The MDS PU quality indicator is not a useful measure of the quality of PU care in NHs and can be misleading if not presented with an explanation of the meaning of the indicator.
Matthew J. Mcgirt - One of the best experts on this subject based on the ideXlab platform.
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Adjustable vs Set-Pressure valves decrease the risk of proximal shunt obstruction in the treatment of pediatric hydrocephalus
Child's Nervous System, 2007Co-Authors: Matthew J. Mcgirt, Donald W. Buck, Daniel Sciubba, Graeme F. Woodworth, Benjamin Carson, Jon Weingart, George JalloAbstract:Introduction The use of programmable shunt valves has increased dramatically in the practice of pediatric hydrocephalus. Despite theoretical advantages, it remains unclear if the use of programmable vs Set-Pressure valves affects shunt outcome. Materials and methods The clinical and radiological records of all pediatric patients undergoing ventriculoperitoneal (VP), ventriculopleural (VPl), and ventriculoatrial (VA) shunt surgery from 2001 to 2004 at an academic institution were reviewed. The association of programmable vs Set-Pressure valves with subsequent shunt revision was assessed by Kaplan–Meier shunt survival plots and log-rank analysis. Results A total of 279 VP, VPl, and VA shunt surgeries were performed on patients with median (interquartile range) age of 4 (1–14) years (161 male, 118 female; 158 communicating, 122 obstructive hydrocephalus). Programmable valves were used in 76 (27%) cases and Set-Pressure valves in 203 (73%). At mean±SD follow-up of 17 ± 13 months, programmable vs Set-Pressure valves were associated with reduced risk of both overall shunt revision [26 (35%) vs 109 (54%); relative risk (RR) (95% CI); 0.61 (0.41–0.91), p = 0.016] and proximal obstruction [9 (12%) vs 58 (28%); RR (95% CI); 0.39 (0.27–0.80), p = 0.006]. There was no difference in distal obstruction [3 (4%) vs 11 (5%) cases], infection [6 (8%) vs 12 (6%) cases], valve obstruction [0 (0%) vs 4 (2%)], or shunt disconnection [2 (3%) vs 1 (1%)] between adjustable and Set-Pressure valves, respectively. Conclusion In our experience, the use of programmable vales was associated with a decreased risk of proximal shunt obstruction and shunt revision. Programmable valves may be preferred in patients frequently experiencing proximal shunt failure. A prospective, controlled study is warranted to evaluate the potential value of adjustable vs Set-Pressure valve systems.
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adjustable vs Set Pressure valves decrease the risk of proximal shunt obstruction in the treatment of pediatric hydrocephalus
Childs Nervous System, 2007Co-Authors: Matthew J. Mcgirt, Daniel Sciubba, Graeme F. Woodworth, Jon Weingart, Donald Buck, Benjamin S Carson, George JalloAbstract:Introduction The use of programmable shunt valves has increased dramatically in the practice of pediatric hydrocephalus. Despite theoretical advantages, it remains unclear if the use of programmable vs Set-Pressure valves affects shunt outcome.
Huang Le - One of the best experts on this subject based on the ideXlab platform.
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Design of constant-Pressure water supply system based on C8051F340 MCU
Electric Drive Automation, 2015Co-Authors: Huang LeAbstract:A kind of water supply system based on a C8051F340 MCU is pesented. The system applies a combination of MCU and frequency converter to control the operation of pump groups,adjust the speed of the pump motor,and achieve the correspondence of the Set Pressure and the exit water Pressure which can vary with the Set Pressure. The hardware design of this systemis simple,and the software which uses PID control algorithm has solved the problems of slow system response and unstable Pressure control. The system has advantages of low cost,high efficiency and stable operation. It can also solve the problems of water hammer,protect the service life of equipments in life and production,effectively utilize the water resources and improve the water quality.