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   Sophy®, the first adjustable pressure valve
 
  Quantification of cerebrospinal fluid shunt flow rates. Assessment of the programmable pressure valve.
  Matsumae M, Sato O, Itoh K, Fukuda T, Suzuki Y. Childs Nerv Syst. 1989 Dec;5(6):356-60.
 
   
  Ventriculoperitoneal shunts with the use of pressure-adjustable valve in the management of hydrocephalus.
  Matsumae M, Sato O, Itoh K, Fukuda T, Suzuki Y. Childs Nerv Syst. 1989 Dec;5(6):356-60.
 
   
  Therapy of normal pressure hydrocephalus with the transcutaneously magnetically adjustable shunt.
  Schmitt J, Spring A. Neurochirurgia (Stuttg). 1990 Oct;33 Suppl 1:23-6. German.
 
   
  Clinical experience with a pressure-adjustable valve SOPHY in the management of hydrocephalus.
  Lumenta CB, Roosen N, Dietrich U. Childs’ Nerv. Syst. 1990 Aug;6(5):270-4.
 
   
  Intracranial pressure monitoring using a programmable pressure valve and a telemetric intracranial pressure sensor in a case of slit ventricle syndrome after multiple shunt revisions.
  Kamiryo T, Fujii Y, Kusaka M, Kashiwagi S, Ito H. Childs Nerv Syst. 1991 Aug;7(4):233-4.
 
   
  Do we need variable pressure shunts?
  Sutcliffe JC, Battersby RD. Br J Neurosurg. 1992;6(1):67-70.
 
   
  Practical value of transcutaneous pressure adjustable valves (Sophy SU 8) in the treatment of hydrocephalus and arachnoid cysts in adults (75 cases).
  Chidiac A, Pelissou-Guyotat I, Sindou M. Neurochirurgie. 1992 ;38(5):291-6. French.
 
   
  Safety of the adjustable pressure ventricular valve in magnetic resonance imaging: problems and solutions.
  Fransen P, Dooms G, Thauvoy C. Neuroradiology. 1992;34(6):508-9
 
   
  Transcutaneous pressure adjustable valve for the treatment of hydrocephalus and arachnoid cysts in adults. Experiences with 75 cases.
  Sindou M, Guyotat-Pelissou I, Chidiac A, Goutelle A. Acta Neurochir (Wien). 1993;121(3-4):135-9.
 
   
  Clinical experience with the Sophy adjustable valve in the treatment of adult hydrocephalus. A series of 147 cases
  Bret P, Guyotat J, Ricci AC, Mottolese C, Jouanneau E. Neurochirurgie. 1999 May;45(2):98-108; discussion 108-9. French.
 
   
  A clinical survey of hydrocephalus and current treatment for hydrocephalus in Japan: analysis by nationwide questionnaire.
  Miyake H, Ohta T, Kajimoto Y, Ogawa D. Childs Nerv Syst. 1999 Aug;15(8):363-8.
 
   
  Withdrawal of shunt systems--clinical use of the programmable shunt system and its effect on hydrocephalus in children.
  Takahashi Y. Childs Nerv Syst. 2001 Aug;17(8):472-7.
 
   
  Adjustable shunt system for the treatment of intracranial cerebrospinal fluid collections. Analysis of a series of 50 cases.
  Rizk T, Abi Lahoud G, Hourany R, Jabbour P, Samaha E, Nohra G, Moussa R, Okais N. J Med Liban. 2002 Jan-Apr;50(1-2):14-6. French.
 
   
  Effect of cell phone magnetic fields on adjustable cerebrospinal fluid shunt valves.
  Nomura S, Fujisawa H, Suzuki M. Surg. Neurol. 2005 May;63(5):467-8.
 
   
   Polaris®, the first MRI-stable adjustable valve
 
  Reliability of a new adjustable shunt device without the need for readjustment following 3-Tesla MRI.
  Lüdemann W, Rosahl SK, Kaminsky J, Samii M. Childs Nerv. Syst. 2005 Mar;21(3):227-9.
 
   
  Effect of 3-tesla magnetic resonance imaging on various pressure programmable shunt valves.
  Inoue T, Kuzu Y, Ogasawara K, Ogawa A. J. Neurosurg. 2005, Aug.;103 (2 Suppl.):163-5.
 
   
  Investigation of the hydrodynamic properties of a new MRI-resistant programmable hydrocephalus shunt.
  Allin DM, Czosnyka M, Richards HK, Pickard JD, Czosnyka ZH. Cerebrospinal Fluid Res. 2008 Apr.21;5:8.
 
   
  Management of neonatal hydrocephalus: feasibility of use and safety of two programmable (Sophy and Polaris) valves.
  Martínez-Lage JF, Almagro MJ, Del Rincón IS, Pérez-Espejo MA, Piqueras C, Alfaro R, Ros de San Pedro J. Childs’ Nerv. Syst. 2008 May;24(5):549-56.
 
   
  Magnetic toys: forbidden for pediatric patients with certain programmable shunt valves?
  Zuzak TJ, Balmer B, Schmidig D, Boltshauser E, Grotzer MA. Childs’ Nerv. Syst. 2009 Feb; 25(2):161-4.
 
   
  Effect of magnetic fields from home-use magnetic induction therapy apparatuses on adjustable cerebrospinal fluid shunt valves
  Nakashima K, Oishi A, Itokawa H, Fujimoto M.No Shinkei Geka. 2010 Aug;38(8):725-9.
 
   
  Programmable shunt valves: in vitro assessment of safety of the magnetic field generated by a portable game machine
  Neurol Med Chir (Tokyo). 2011;51(9):635-8
 
   
   Pressio® ICP monitoring system
 
  Laboratory testing of the Pressio intracranial pressure monitor.
  Allin D, Czosnyka M, Czosnyka Z. Neurosurgery. 2008 May;62(5):1158-61; discussion 1161.
 
   
   
     
 

 

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