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Codman hakim shunt

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https://www.readbyqxmd.com/read/28660395/comparison-of-anti-siphon-devices-how-do-they-affect-csf-dynamics-in-supine-and-upright-posture
#1
COMPARATIVE STUDY
Manuel Gehlen, Anders Eklund, Vartan Kurtcuoglu, Jan Malm, Marianne Schmid Daners
BACKGROUND: Three different types of anti-siphon devices (ASDs) have been developed to counteract siphoning-induced overdrainage in upright posture. However, it is not known how the different ASDs affect CSF dynamics under the complex pressure environment seen in clinic due to postural changes. We investigated which ASDs can avoid overdrainage in upright posture best without leading to CSF accumulation. METHODS: Three shunts each of the types Codman Hakim with SiphonGuard (flow-regulated), Miethke miniNAV with proSA (gravitational), and Medtronic Delta (membrane controlled) were tested...
August 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28186475/programmable-shunt-valve-interactions-with-osseointegrated-hearing-devices
#2
Matthew J Pierson, Daniel Wehrmann, J Andrew Albers, Najib E El Tecle, Dary Costa, Samer K Elbabaa
OBJECTIVE Patients with ventriculoperitoneal (VP) shunts with programmable valves who would benefit from osseointegrated hearing devices (OIHDs) represent a unique population. The aim of this study was to evaluate the magnetic field strengths of 4 OIHDs and their interactions with 5 programmable VP shunt valves. METHODS Magnetic field strength was measured as a function of distance for each hearing device (Cochlear Baha 5, Cochlear Baha BP110, Oticon Ponto Plus Power, and Medtronic Sophono) in the following modes: inactive, active in quiet, and active in 60 decibels of background noise in the sound booth...
April 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/27857929/shunt-overdrainage-caused-by-displacement-of-the-pressure-control-cam-after-pressure-adjustment
#3
Su-Ho Kim, Yoon-Soo Lee, Min-Seok Lee, Sang-Jun Suh, Jeong-Ho Lee, Dong-Gee Kang
Although the Codman-Hakim programmable valve is one of most popular shunt systems used in the clinical practice for the treatment of hydrocephalus, malfunctions related with this system have been also reported which lead to underdrainage or overdrainage of the cerebrospinal fluid. While obstruction of the ventricular catheter by tissue materials or hematoma and catheter disconnection are relatively common, the malfunction of the valve itself is rare. Herein, we report on a rare case of shunt overdrainage caused by displacement of the pressure control cam after pressure adjustment...
October 2016: Korean Journal of Neurotrauma
https://www.readbyqxmd.com/read/27476923/impact-of-magnetic-field-on-pressures-of-programmable-cerebrospinal-fluid-shunts-an-experimental-study
#4
Idiris Altun, Kasim Zafer Yuksel, Tufan Mert
AIM: To investigate whether programmable cerebrospinal fluid (CSF) shunts are influenced by exposure to the magnetic field and to compare the effects of magnetic field in 4 different brands of programmable CSF shunts. MATERIAL AND METHODS: This experimental study was performed in the laboratory using a novel design of magnetic field. Four types of programmable CSF shunts (Miethke®, Medtronic®, Sophysa® and Codman®Hakim®) were exposed to the magnetic field generated by an apparatus consisting of Helmholtz coil for 5 minutes...
2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/26455768/prosepective-study-to-evaluate-rate-and-frequency-of-perturbations-of-implanted-programmable-hakim-codman-valve-after-1-5-tesla-magnetic-resonance-imaging
#5
Jody Filippo Capitanio, Alice Venier, Lucio Aniello Mazzeo, Lina Raffaella Barzaghi, Stefania Acerno, Pietro Mortini
BACKGROUND: Exposure to magnetic fields may alter the settings of programmable ventriculoperitoneal shunt valves or even cause permanent damages to these devices. There is little information about this topic, none on live patients. OBJECTIVE: To investigate the effects of 1.5-tesla magnetic resonance imaging (MRI) on Hakim-Codman (HC) pressure programmable valves implanted in our hospital. METHODS: A single-center prospective study to assess the rate of perturbations of HC programmable valve implanted...
April 2016: World Neurosurgery
https://www.readbyqxmd.com/read/26149436/programmable-shunts-and-headphones-are-they-safe-together
#6
COMPARATIVE STUDY
Heather S Spader, Linda Ratanaprasatporn, John F Morrison, Jonathan A Grossberg, G Rees Cosgrove
OBJECT: Programmable shunts have a valuable role in the treatment of patients with hydrocephalus, but because a magnet is used to change valve settings, interactions with external magnets may reprogram these shunts. Previous studies have demonstrated the ability of magnetic toys and iPads to erroneously reprogram shunts. Headphones are even more ubiquitous, and they contain an electromagnet for sound projection that sits on the head very close to the shunt valve. This study is the first to look at the magnetic field emissions of headphones and their effect on reprogrammable shunt valves to ascertain whether headphones are safe for patients with these shunts to wear...
October 2015: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/25350819/progression-of-normal-tension-glaucoma-after-ventriculoperitoneal-shunt-to-decrease-cerebrospinal-fluid-pressure
#7
Brian H Chen, Mitchell D Drucker, Kenneth M Louis, David W Richards
PURPOSE: To report a case of worsening normal-tension glaucoma immediately following ventriculoperitoneal (VP) shunt placement to lower cerebrospinal fluid pressure (CSFP). METHODS: The clinical records of the patient were reviewed retrospectively. Observations were made and collated as the case progressed. RESULTS: A 93-year-old white woman previously diagnosed with normal-tension glaucoma underwent placement of a VP shunt with a Codman-Hakim programmable valve for normal pressure hydrocephalus...
January 2016: Journal of Glaucoma
https://www.readbyqxmd.com/read/24635137/disruption-of-silicone-valve-housing-in-a-codman-hakim-precision-valve-with-integrated-siphonguard
#8
Peter A Woerdeman, David D Cochrane
Authors of this report describe 2 patients who had undergone shunt insertion for hydrocephalus and who, at 6 weeks or 9 months after their last revision, presented with symptoms of shunt dysfunction and CSF collections at the valve site. At the ensuing shunt revision in both patients, the silicone housing was fractured and the Siphonguard was disconnected from the Codman Hakim Precision flat-bottom valve. The cause of these failures was not clear since manipulation, bending, and twisting of the valves were not thought to have occurred during implantation...
May 2014: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/24231878/indications-for-valve-pressure-adjustments-of-gravitational-assisted-valves-in-patients-with-idiopathic-normal-pressure-hydrocephalus
#9
Leonie Gölz, Johannes Lemcke, Ullrich Meier
BACKGROUND: Modern ventriculoperitoneal shunts (VPS) are programmable, which enables clinicians to adjust valve-pressure according to their patients' individual needs. The aim of this retrospective analysis is to evaluate indications for valve-pressure adjustments in idiopathic normal pressure hydrocephalus (iNPH). METHODS: Patients operated between 2004 and 2011 diagnosed with iNPH were included. Kiefer-Scale was used to classify each patient. Follow-up exams were conducted 3, 6, and 12 months after shunt implantation and yearly thereafter...
2013: Surgical Neurology International
https://www.readbyqxmd.com/read/24067779/lumbosubarachnoid-lumboepidural-shunting-in-patients-with-idiopathic-normal-pressure-hydrocephalus-surgical-procedures-and-follow-up-study-of-five-cases
#10
Totaro Takeuchi, Shintaro Fukushima, Daigoro Misaki, Satoshi Shibata
The objective of the study is to introduce the surgical procedure of the lumbosubarachnoid-lumboepidural (L-L) shunting performed as treatment for idiopathic normal-pressure hydrocephalus (iNPH) and its follow-up. The subjects were five patients with probable iNPH (aged 78-85 years; mean age 81 years; four males and one female) who were judged to be at high risk from general or lumbar anesthesia due to their systemic complications and age. The L-L shunt operation was performed for all the patients under local anesthesia using Codman-Hakim Programmable Valve(®) (Codman & Shurtleff, Inc...
2013: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/23900632/role-of-ventriculoperitoneal-shunt-valve-design-in-the-treatment-of-pediatric-hydrocephalus-a-single-center-study-of-valve-performance-in-the-clinical-setting
#11
Thomas Beez, Sevgi Sarikaya-Seiwert, Lina Bellstädt, Mario Mühmer, Hans-Jakob Steiger
PURPOSE: Previous studies have established risk factors for ventriculoperitoneal shunt failure in children. However, the role of valve type as a determinant of complications and outcome remains unclear. The aim of this study was to compare the fixed-pressure paediGAV and the programmable Codman Hakim valves in the clinical setting. METHODS: We conducted a retrospective review of patients younger than 16 years who underwent primary implantation of a ventriculoperitoneal shunt with either valve type at our institution between January 2005 and December 2010...
February 2014: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/23831048/patients-benefit-from-low-pressure-settings-enabled-by-gravitational-valves-in-normal-pressure-hydrocephalus
#12
Florian Baptist Freimann, Peter Vajkoczy, Christian Sprung
OBJECTIVE: The ability of siphon regulatory devices to improve overdrainage control despite low-pressure settings of the valve for the horizontal body position has been described previously. We aim to provide a systematic investigation on the ability of gravitational units as siphon regulatory devices to improve clinical outcome in shunt therapy. METHODS: We analyzed retrospectively postoperative complications, type and frequency of valve adjustments and the clinical outcome using Black's outcome scale at different time points of all iNPH patients operated in our center between January 2007 and December 2010...
October 2013: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/23705870/programming-jammed-codman-hakim-programmable-valves-study-of-an-explanted-valve-and-successful-programming-in-a-patient
#13
Sui-To Wong, Eleanor Wen, Dawson Fong
Malfunction of a Codman Hakim programmable valve due to jamming of its programmable component may necessitate shunt revision. The authors report a method for programming jammed Codman Hakim programmable valves by using a Strata II magnet and additional neodymium magnets. The programming method was derived after studying a jammed valve in the laboratory that was explanted from an 10-year-old boy with a history of fourth ventricle ependymoma. Programming the explanted valve with a Codman programmer failed, but rotating a Strata II magnet above the valve resulted in rotation of the spiral cam in the valve...
August 2013: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/23140212/in-vitro-experiment-for-verification-of-the-tandem-shunt-valve-system-a-novel-method-for-treating-hydrocephalus-by-flexibly-controlling-cerebrospinal-fluid-flow-and-intracranial-pressure
#14
Yasuo Aihara, Ichiro Shoji, Yoshikazu Okada
OBJECT: The CSF shunt valve is a medical device whose main function is to regulate intracranial pressure and drain excess CSF. The authors have developed a new therapeutic method for treating hydrocephalus, namely the tandem shunt valve system, which has the potential of flexibly controlling the CSF flow rate and intracranial pressure in patients. METHODS: The properties of the tandem system were verified by performing in vitro experiments. An in vitro system with a manometer was built to measure pressure and flow rates of water in open systems using the Codman Hakim Programmable Valve and the Strata adjustable pressure programmable valve...
January 2013: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/22653392/assessment-of-a-quick-reference-table-algorithm-for-determining-initial-postoperative-pressure-settings-of-programmable-pressure-valves-in-patients-with-idiopathic-normal-pressure-hydrocephalus-sinphoni-subanalysis
#15
MULTICENTER STUDY
Hiroji Miyake, Yoshinaga Kajimoto, Hisayuki Murai, Sadahiro Nomura, Shigeki Ono, Yuji Okamoto, Yoshihiro Sumi
BACKGROUND: Management of overdrainage complications in shunted patients with idiopathic normal pressure hydrocephalus (INPH) remains a difficult task despite the use of programmable pressure valves. OBJECTIVE: To assess the usefulness of a quick reference table (QRT) algorithm for achieving a suitable initial programmable pressure valve setting in INPH patients who participated in the Study for INPH on Neurological Improvement (SINPHONI). METHODS: One hundred registered patients diagnosed with probable INPH were treated with ventriculoperitoneal shunts using Codman-Hakim programmable valves (CHPVs)...
September 2012: Neurosurgery
https://www.readbyqxmd.com/read/21946726/programmable-shunt-valves-in-vitro-assessment-of-safety-of-the-magnetic-field-generated-by-a-portable-game-machine
#16
Koji Nakashima, Takato Nakajo, Michiari Kawamo, Akihito Kato, Seiichiro Ishigaki, Hidetomo Murakami, Yohichi Imaizumi, Hitoshi Izumiyama
Cerebrospinal fluid (CSF) shunts are frequently used to treat hydrocephalus. The use of a programmable shunt valve allows physicians to easily change the opening pressure. Since patients with adjustable CSF shunt valves may use portable game machines, the permanent magnets in these machines may alter the shunt valve programmed settings or permanently damage the device. This study investigated the risk of unintentional valve adjustment associated with the use of game machines in patients with programmable CSF shunt valves...
2011: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/21447851/-management-of-secondary-normal-pressure-hydrocephalus-and-assessment-of-cortical-reorganization-using-fmri
#17
Keiko Hiramoto, Hiroyuki Kudo, Hiroyuki Muranaka, Naoki Hirata, Munetsugu Kouta, Tsuneji Murakami, Hiroshi Kondo
We assessed the motor recovery and cortical reorganization associated with intracranial pressure (ICP) control in a secondary normal pressure hydrocephalus (sNPH) patient. A 32-year-old man with sNPH resulting from a head injury presented with left hemiplegia. A ventricular-peritoneum shunt (VP shunt) was surgically inserted for the sNPH using a Codman Hakim Programmable Valve, and his ICP was controlled according to the ventricular size by CT scanning. The motor function of the patient was evaluated by functional MRI (fMRI) during ICP control in our hospital...
April 2011: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/21040519/diagnosis-of-idiopathic-normal-pressure-hydrocephalus-is-supported-by-mri-based-scheme-a-prospective-cohort-study
#18
Masaaki Hashimoto, Masatsune Ishikawa, Etsuro Mori, Nobumasa Kuwana
BACKGROUND: Idiopathic normal pressure hydrocephalus (iNPH) is a treatable neurological syndrome in the elderly. Although the magnetic resonance imaging (MRI) findings of tight high-convexity and medial subarachnoid spaces and the ventriculo-peritoneal (VP) shunt with programmable valve are reportedly useful for diagnosis and treatment, respectively, their clinical significance remains to be validated. We conducted a multicenter prospective study (Study of Idiopathic Normal Pressure Hydrocephalus on Neurological Improvement: SINPHONI) to evaluate the utility of the MRI-based diagnosis for determining the 1-year outcome after VP shunt with the Codman-Hakim programmable valve...
October 31, 2010: Cerebrospinal Fluid Research
https://www.readbyqxmd.com/read/20697146/-effect-of-magnetic-fields-from-home-use-magnetic-induction-therapy-apparatuses-on-adjustable-cerebrospinal-fluid-shunt-valves
#19
Koji Nakashima, Atsunori Oishi, Hiroshi Itokawa, Michio Fujimoto
OBJECTIVE: Cerebrospinal fluid (CSF) shunts are frequently used to treat hydrocephalus. The use of a programmable valve allows the operator to easily change the opening pressure. In Japan, many people use magnetic induction therapy apparatuses in their homes. However, exposing patients with adjustable CSF shunt valves to the permanent magnets included in these apparatuses may alter the shunt valve's programmed settings or permanently damage the device. Therefore, the goal of this study was to determine the health risk associated with magnetic induction therapy for patients using programmable CSF shunt valves...
August 2010: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/20679942/a-nonradiographic-system-for-assessing-pressure-for-the-codman-hakim-programmable-valve
#20
MULTICENTER STUDY
Nancy Olsen Bailey, Mark Luciano, Michael V Ward, Sean Lilienfeld, William N Anderson, Peter Black
BACKGROUND: The Codman-Hakim Programmable Valve is widely used in shunting hydrocephalus and other conditions. OBJECT: To establish an accurate valve verification system for the Codman-Hakim programmable valve that does not require radiographic exposure. METHODS: Prospective clinical trial tested a new valve verification system at 9 research sites. RESULTS: The Valve Programming and Verification System allowed us to establish the valve setting in 62% of subjects with a programmable valve...
September 2010: Neurosurgery
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