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2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON), 2010
The shunt-series shunt-shunt and shunt-series series-shunt dual feedback amplifiers are demonstrated in this paper using 2-µm GaInP/GaAs HBT technology. The shunt-series shunt-shunt and shunt-series series-shunt wideband amplifiers achieve a small-signal gain of 31/33 dB with the same 3-dB bandwidth of 6 GHz.
Chinchun Meng +2 more
openaire +2 more sources
The shunt-series shunt-shunt and shunt-series series-shunt dual feedback amplifiers are demonstrated in this paper using 2-µm GaInP/GaAs HBT technology. The shunt-series shunt-shunt and shunt-series series-shunt wideband amplifiers achieve a small-signal gain of 31/33 dB with the same 3-dB bandwidth of 6 GHz.
Chinchun Meng +2 more
openaire +2 more sources
Shunts and Shunt Problems in Childhood
1988Extra cranial shunting procedures (Cone et al. 1949, Matson 1951) were used to treat hydrocephalus before the work of Nulsen and Spitz (1952) and before the introduction of the Holter valve in 1956. However in most cases they were inefficient or even dangerous; they overdrained because they could not close and rapidly blocked due to tissue reaction to ...
E. Hoppe-Hirsch, Jean-François Hirsch
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Critical Care Medicine, 2010
Objective:Right-to-left shunting across a patent foramen ovale may occur in acute respiratory distress syndrome as a result of pulmonary hypertension and positive-pressure mechanical ventilation. The shunt may worsen the hypoxemia.
Laurent Brochard
exaly +2 more sources
Objective:Right-to-left shunting across a patent foramen ovale may occur in acute respiratory distress syndrome as a result of pulmonary hypertension and positive-pressure mechanical ventilation. The shunt may worsen the hypoxemia.
Laurent Brochard
exaly +2 more sources
Should ventriculoatrial shunting be the procedure of choice for normal-pressure hydrocephalus?
Journal of Neurosurgery, 2014OBJECT Ventriculoatrial (VA) shunting is rarely used for patients with normal-pressure hydrocephalus (NPH), likely due to surgeon technical preference and case reports indicating cardiopulmonary complications.
R. McGovern +4 more
semanticscholar +1 more source
2018
Perhaps one of the most intriguing events in neurosurgical history is the invention and use of the shunt system to treat hydrocephalus, despite the shunt’s high failure rates. The shunt system, classically composed of a proximal catheter, valve, and distal catheter, was developed in the 1950s.
Prashant Hariharan, Carolyn A. Harris
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Perhaps one of the most intriguing events in neurosurgical history is the invention and use of the shunt system to treat hydrocephalus, despite the shunt’s high failure rates. The shunt system, classically composed of a proximal catheter, valve, and distal catheter, was developed in the 1950s.
Prashant Hariharan, Carolyn A. Harris
openaire +2 more sources
Band Gap Control in an Active Elastic Metamaterial With Negative Capacitance Piezoelectric Shunting
, 2014Elastic metamaterials have been extensively investigated due to their significant effects on controlling propagation of elastic waves. One of the most interesting properties is the generation of band gaps, in which subwavelength elastic waves cannot ...
Yangyang Chen, Guoliang Huang, C. Sun
semanticscholar +1 more source
Shunts and Shunt Complications
2017Hydrocephalus is a common entity in neurosurgical practice affecting both adult and pediatric populations. VP shunts are the standard of care for most patients suffering from hydrocephalus, even with the introduction of more advanced therapeutic options such as endoscopic ventriculostomy.
Yazid Maghrabi, Saleh S. Baeesa
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Shunt Dependency in Shunted Arachnoid Cyst: A Reason to Avoid Shunting
Pediatric Neurosurgery, 2002Cystoperitoneal (CP) shunting is minimally invasive and achieves a high rate of resolution on neuroimaging. However, in the absence of definite symptoms, shunting should be reconsidered, because some patients can experience shunt dependency after CP shunting.
Seung-Ki Kim +4 more
openaire +3 more sources
Journal of Neurosurgery: Pediatrics, 2013
OBJECT The Hydrocephalus Clinical Research Network (HCRN), which comprises 7 pediatric neurosurgical centers in North America, provides a unique multicenter assessment of the current outcomes of CSF shunting in nonselected patients.
A. Kulkarni +11 more
semanticscholar +1 more source
OBJECT The Hydrocephalus Clinical Research Network (HCRN), which comprises 7 pediatric neurosurgical centers in North America, provides a unique multicenter assessment of the current outcomes of CSF shunting in nonselected patients.
A. Kulkarni +11 more
semanticscholar +1 more source
Shunt malfunction in relation to shunt infection
Acta Neurochirurgica, 1996Ventriculo-peritoneal shunt malfunction may be caused by shunt infection which may not be clinically apparent as the cause of the malfunction by standard diagnostic criteria. This suggests that the real incidence of infected shunts might be higher than previously suspected.
Nieves Saiz-Sapena +2 more
openaire +3 more sources