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Results 201 - 250 of 1326
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Catananti Chiara - - 2010
Rheumatoid arthritis may cause central nervous system complications by means of various mechanisms. We describe the case of a patient with a new diagnosis of rheumatoid arthritis (RA) complicated by normal-pressure hydrocephalus. After treatment with prednisone, the patient improved remarkably as regards mental status, urinary control and gait. We suggest ...
Maurizi Charles P - - 2010
Errors can be instructive. It seems that Harvey Cushing and Louis Weed provided the medical world with a faulty theory of cerebrospinal fluid absorption. Louis Weed, working in Harvey Cushing's laboratory, initially studied the movement of substances in the cerebrospinal fluid by using low-pressure studies. Results of the low-pressure studies ...
Nuti Angelo - - 2010
Idiopathic low cerebrospinal fluid (CSF) pressure headache is considered to be one that worsens within 15 min of sitting-up or standing-up, accompanied by at least one of the following: neck stiffness, tinnitus, hypacusia, photophobia and nausea. Several reports suggest that a substantial number of idiopathic low CSF pressure cases do not ...
Hunter Gary - - 2010
INTRODUCTION: Idiopathic intracranial hypertension (IIH) can be an elusive diagnosis, and poor visual outcomes may occur. Currently, the only means of accurately diagnosing and following these patients is with repeated lumbar puncture. Previous work has shown that transcranial doppler measurements of pulsatility correlate accurately with elevated intracranial pressure (ICP). This ...
Avery Robert A - - 2010
The recommendation to measure cerebrospinal fluid opening pressure in the extended, rather than the flexed lateral recumbent position to avoid false elevation of the opening pressure has not been formally evaluated in children. This single-center prospective cohort study includes 53 children who had their opening pressure measured in both the ...
Masoumi Nafiseh - - 2010
Intracranial pressure (ICP) is derived from cerebral blood pressure and cerebrospinal fluid (CSF) circulatory dynamics and can be affected in the course of many diseases. Computer analysis of the ICP time pattern plays a crucial role in the diagnosis and treatment of those diseases. This study proposes the application of ...
Bono F - - 2010
There are limited data on the relationship between normal cerebrospinal fluid (CSF) opening pressure and bilateral transverse sinus stenosis (BTSS); there are also several conflicting reports about the upper limit of normal CSF opening pressure. To evaluate the influence of BTSS on the upper limit of normal CSF opening pressure, ...
Hanigan William C - - 2010
PURPOSE: This study investigated changes in regional cerebral blood flow (rCBF), autoregulation (AR), and mean CO(2) reactivity (CO(2)r) in nine neonates, who underwent cerebrospinal fluid (CSF) diversion for congenital hydrocephalus. METHODS: During shunt insertion, a thermal diffusion probe inserted adjacent to the ventricular catheter in the right parietal region recorded ...
Alpert Bruce - - 2010
In this article, leaders of the AAMI Sphygmomanometer Committee report on their efforts to address home use issues in standards for blood pressure devices, and the importance of standards to ensuring safety and effectiveness of home use devices.
Giacomozzi Claudia - - 2010
A worldwide scientific discussion has been started in 2010 on the need for standardisation, assessment, and delivery of recommendations in the field of plantar pressure distribution measurement at different levels: hardware performance, measuring protocols, data processing, parameters and indicators in diagnosis and therapy. The Italian National Institute of Health (Istituto ...
El-Shafei Ismail L - - 2010
Retrograde ventriculovenous (RVV) shunts utilize the impact pressure of the venous bloodstream to maintain the intraventricular pressure more than the pressure in the draining venous channel and to maintain a continuous flow of cerebrospinal fluid (CSF) to the venous circulation at a rate equal to and dependent upon the rate ...
Diener Hans-Christoph - - 2010
This chapter deals with non-vascular intracranial disorders resulting in headache. Headache attributed to high or low cerebrospinal fluid pressure is separated into headache attributed to idiopathic intracranial hypertension (IIH), headache attributed to intracranial hypertension secondary to metabolic, toxic, or hormonal causes, headache attributed to intracranial hypertension secondary to hydrocephalus, post-dural ...
Coffey Robert J - - 2010
Intrathecal drug delivery catheter malfunctions are a principal cause of therapy interruption. We determined that normal baseline intrathecal cerebrospinal fluid (CSF) pressure recordings could be obtained in an ovine model and in a catheter dislodgement scenario. Two sheep were implanted with spinal catheters: 2 in the T(6) epidural space in ...
Mabotuwana Thusitha - - 2010
Quality indicators are an important part of the primary care landscape, but focus strongly on point-in-time measurements, such as a patient's last blood pressure (BP) measurement. There is a larger space of possible measurements, including ones that more explicitly consider management over an interval of time. To determine the predictive ...
Eide Per K - - 2010
BACKGROUND: We have previously seen that idiopathic normal pressure hydrocephalus (iNPH) patients having elevated intracranial pressure (ICP) pulse amplitude consistently respond to shunt surgery. In this study we explored how the cerebrospinal fluid pressure (CSFP) pulse amplitude determined during lumbar infusion testing, correlates with ICP pulse amplitude determined during over-night ...
Fragiacomo Giulio - - 2010
In the framework of developing innovative microfabricated pressure sensors, we present here three designs based on different readout principles, each one tailored for a specific application. A touch mode capacitive pressure sensor with high sensitivity (14 pF/bar), low temperature dependence and high capacitive output signal (more than 100 pF) is ...
Mueller Sebastian S Department of Medicine and Center for Alcohol Research, Liver Disease and Nutrition, Salem Medical Center, University of Heidelberg, Heidelberg, - - 2010
The noninvasive quantitation of liver stiffness (LS) by ultrasound based transient elastography using FibroScan® has revolutionized the diagnosis of liver diseases, namely liver cirrhosis. Alternative techniques such as acoustic radiation impulse frequency imaging or magnetic resonance elastography are currently under investigation. LS is an excellent surrogate marker of advanced fibrosis ...
Turgut Nilda - - 2010
Spontaneous intracranial hypotension (SIH) is a syndrome caused by low cerebrospinal fluid (CSF) pressure due to leakage of CSF. Clinically, orthostatic headache, neck pain, nausea, emesis, interscapular pain, diplopia, dizziness, changes in hearing, visual blurring and radicular upper extremity symptoms are most frequently observed. We describe a 57-year-old man with ...
Scollato Antonio - - 2010
The aim of our pilot study was to investigate, by a proteomic approach, the expressed differences in cerebrospinal fluid (CSF) protein patterns in order to aid in the diagnosis and treatment of normal pressure hydrocephalus (NPH). Seventeen patients with NPH, selected by Intracranial-Pressure monitoring (ICPmo), underwent implantation of a shunt ...
Klein O - - 2010
The aim of this study was to monitor the 24 h cerebrospinal fluid (CSF) outflow and intracranial pressure (ICP) in hydrocephalic adult patients with external ventricular drainage (EVD). Twelve patients (5M/7F) aged 30-69 years suffering from acute hydrocephalus requiring EVD were admitted in the neuro-intensive care unit. The CSF collecting ...
Lee Shane Wei - - 2009
It has been postulated that cerebral venous outflow "obstruction" is a precipitating factor for many cases of idiopathic intracranial hypertension (IIH). We describe a 17-year-old woman with IIH, and "venous obstruction" repeatedly demonstrated on magnetic resonance venography (MRV) that within minutes resolved partially when the cerebrospinal fluid (CSF) pressure was ...
Ng Samuel E S - - 2009
PURPOSE: To define the value of Evans' index (EI), aqueductal flow rate (FR), and apparent diffusion coefficient (ADC) in the diagnosis of normal pressure hydrocephalus (NPH) and to assess the ability of these markers preoperatively to predict shunt response. To shed some light as to the mechanisms responsible for the ...
Nagra Gurjit - - 2009
In some tissues, the injection of antibodies to the beta(1)-integrins leads to a reduction in interstitial fluid pressure, indicating an active role for the extracellular matrix in tissue pressure regulation. If perturbations of the matrix occur in the periventricular area of the brain, a comparable lowering of interstitial pressures may ...
Chen Zhen - - 2009
This study compares the effect and rehabilitation prognosis of 6-month combined ventriculoperitoneal shunt (VPS) versus rehabilitation training alone in chronic normal-pressure hydrocephalus patients. METHOD: After suffering from aneurysmal subarachnoid hemorrhage, 39 subjects were diagnosed with chronic normal-pressure hydrocephalus because of clinical deterioration or nonimprovement of gait ataxia, cognitive disturbance, and/or ...
Hölper P - - 2009
We report a case with spinal cord ischemia and consecutive paraplegia following spontaneous isolated abdominal aortic dissection (IAAD). A 63-year-old female was admitted to the surgical emergency room with severe lumbar back pain and accompanying paresthesia of both legs. Contrast enhanced computed tomograpy (CT) of the abdomen showed an infrarenal ...
Chrysikopoulos Haris - - 2009
Idiopathic normal pressure hydrocephalus (NPH) remains a mysterious entity, with several gaps in our understanding, despite intensive research. The current theory of its etiology is diminished vascular compliance with redistribution of vascular pulsations. The manifestations of NPH can be explained by the compression of parenchyma and vessels and the accumulation ...
Leliefeld Paul H - - 2009
Raised intracranial pressure (ICP) in infants with hydrocephalus may cause (ir)reversible damage to the brain parenchyma but can be present without clinical signs and/or symptoms. Therefore, new, favorably noninvasive, detection methods are needed to distinguish between compensated hydrocephalus with normal intracranial pressure and slowly progressive hydrocephalus with increased intracranial pressure. ...
Killer Hanspeter E - - 2009
The term 'papilledema' is used to describe swelling of the optic disc that is thought or known to be associated with increased intracranial pressure (ICP) transmitted to the subarachnoid space (SAS) surrounding the optic nerve (ON). In most cases, the diagnosis of increased ICP is confirmed by lumbar puncture, the ...
Freer Sean R - - 2009
The cerebrospinal fluid (CSF) signal-void sign is a CSF signal loss, especially on T2-weighted magnetic resonance (MR) images. The CSF signal-void sign is often seen in small dogs with hydrocephalus and syringomyelia. In people, this sign is attributed to high velocity or turbulent CSF flow resulting from normal arterial pulsations, ...
Lim Ming Jin - - 2009
PURPOSE: The effects of pCO2 on cerebral spinal fluid (CSF) pressure measurement were observed in four patients. METHODS: Children presenting with either a diagnosis or suspected diagnosis of IIH, who were undergoing lumbar puncture under a general anaesthetic for pressure measurement, were recruited to study the relationship between pCO2 and ...
Linninger Andreas A - - 2009
CINE phase-contrast MRI (CINE-MRI) was used to measure cerebrospinal fluid (CSF) velocities and flow rates in the brain of six normal subjects and five patients with communicating hydrocephalus. Mathematical brain models were created using the MRI images of normal subjects and hydrocephalic patients. In our model, the effect of pulsatile ...
Bateman Grant A - - 2009
OBJECT: A collapsible segment in the venous outflow has been noted in many patients with idiopathic intracranial hypertension (IIH). Mathematical modeling has shown that these collapsible segments can account for the elevated cerebrospinal fluid (CSF) pressures associated with IIH. However, the model required an elevated outflow resistance of up to ...
Arnell Kai - - 2009
OBJECT: The authors investigated and compared the in vitro characteristics of 2 CSF shunts, the Strata NSC and the Codman Hakim, and their corresponding antisiphon devices (ASDs). METHODS: Six new CSF shunts and the corresponding ASDs for each model were tested in an automated, computerized experimental setup based on pressure ...
Chang Ta C - - 2009
PURPOSE: To investigate the relative prevalence of glaucomatous disease in patients with normal pressure hydrocephalus (NPH) compared with age-matched non-NPH controls with hydrocephalus. DESIGN: Case-control study. PARTICIPANTS: Using International Classification of Diseases (ICD-9) codes, we identified the medical records of 72 NPH cases and 72 age-matched controls with hydrocephalus treated ...
Kwon Brian K - - 2009
OBJECT: Ischemia is an important factor in the pathophysiology of secondary damage after traumatic spinal cord injury (SCI) and, in the setting of thoracoabdominal aortic aneurysm repair, can be the primary cause of paralysis. Lowering the intrathecal pressure (ITP) by draining CSF is routinely done in thoracoabdominal aortic aneurysm surgery ...
Kurzbuch Arthur R - - 2009
We report the case of a Menière's disease patient affected by normal pressure hydrocephalus (NPH) who presented a cerebrospinal fluid (CSF) pressure-dependent hearing impairment after shunting. This side-effect was not only reversible and reproducible but occurred at a high opening pressure when the valve setting was lowered by only 0.7 ...
de Almeida John R - - 2009
Repair of cerebrospinal fluid (CSF) leaks with grafts can be augmented with various adjuncts to improve approximation such as tissue adhesives and sutures. Here we test various adjuncts in an in vitro model of CSF leak repairs. A novel pressure testing system was designed to evaluate the burst pressures of ...
Wostyn Peter - - 2009
In a recent article, elevated cerebrospinal fluid pressure (CSFP) consistent with very early normal pressure hydrocephalus (NPH), was found in a small subset of Alzheimer's disease (AD) patients (possible AD-NPH hybrids) enrolled in a clinical trial for chronic low-flow cerebrospinal fluid drainage. Also in the same study, was another interesting ...
Ulus A Tulga - - 2009
To analyze the effect of central venous pressure on cerebrospinal fluid oxygen tension and intrathecal pressure, multiparameter sensors were introduced into the intrathecal space for continuous monitoring of cerebrospinal fluid Po(2), Pco(2), and intrathecal pressure in 15 pigs. After 20 min of aortic clamping, hypervolemia was established for 20 min, ...
Horstman Damian J - - 2009
BACKGROUND: Previous studies have shown more extensive cephalad sensory blockade in women receiving combined spinal-epidural (CSE) anesthesia compared with single-shot spinal (SSS) anesthesia for elective cesarean delivery. It has been postulated that introduction of the epidural needle during CSE disturbs the negative pressure in the epidural space, resulting in relatively ...
Martin Bryn A - - 2009
The influence of coughing, on the biomechanical environment in the spinal subarachnoid space (SAS) in the presence of a cerebrospinal fluid flow stenosis, is thought to be an important etiological factor in craniospinal disorders, including syringomyelia (SM), Chiari I malformation, and hydrocephalus. The aim of this study was to investigate ...
Penn Richard D - - 2009
This article reviews our previous work on the dynamics of the intracranial cavity and presents new clinically relevant results about hydrocephalus that can be gained from this approach. Simulations based on fluid dynamics and poroelasticity theory are used to predict CSF flow, pressures and brain tissue movement in normal subjects. ...
Shipova E G - - 2009
MRI scans were obtained of the cervical section of the spinal cords of 30 patients with remitting multiple sclerosis. During the study period, patients received immunomodulatory agents (seven received interferon beta-1a, 13 received interferon beta-1b, and 10 received glatiramer acetate). Total focus volume in brain matter was assessed before and ...
Finney Glen R - - 2009
Normal Pressure Hydrocephalus first became recognized as a treatable, reversible disorder in the 1960s. The classic triad of magnetic apraxia, urinary incontinence, and dementia remain relevant into the 21(st) century as being the basis for symptomatic diagnosis and predicting potential benefit from ventriculoperitoneal shunting, though they have been greatly augmented ...
Aboul-Enein Fahmy - - 2009
BACKGROUND: An 80-year-old woman presented with progressive cognitive decline and with a 6-month history of gait ataxia. Brain MRI depicted enlarged ventricles and periventricular lesions. Clinical improvement after CSF spinal tap test suggested a normal pressure hydrocephalus syndrome. But CSF pleocytosis with activated lymphocytes and plasma cells and intrathecal Borrelia ...
Thomas Rhys H - - 2009
We present two cases of normal pressure hydrocephalus in combination with grasp reflexes. In both cases the grasp reflexes disappeared following high volume cerebrospinal fluid removal. In one of the cases the grasp reflexes returned over a period of weeks but again resolved following definitive cerebrospinal fluid shunting surgery, and ...
Kajiwara Motohiro - - 2009
Normal pressure hydrocephalus after radiosurgery for meningioma has rarely been reported. We report such a case and discuss the role of radiosurgery in the development of hydrocephalus. A 75-year-old man with a growing tumor underwent linac-based radiosurgery. The tumor received 16 Gy to the 80% isodose line. He exhibited the ...
Smuck Matthew - - 2008
OBJECTIVE: Report a case of intravascular contrast injection during lumbar discography. SETTING: An academic University spine center. PATIENT: Forty-year-old woman with L5-S1 degenerative disk disease and persistent low back pain. INTERVENTION: The patient failed to respond to multiple conservative treatments. In consideration of surgical treatment, discography was requested. RESULTS: A ...
Andersson Nina - - 2008
OBJECT: The outflow resistance (Rout) of the cerebrospinal fluid (CSF) system has generally been accepted by most investigators as independent of intracranial pressure (ICP), but there are also those claiming that it is not. The general belief is that this question has been investigated numerous times in the past, but ...
Lee Hyo Sung - - 2009
Many theories have been postulated to date regarding mechanisms involved in non-enlargement of the subarachnoid space and enlargement of the ventricles in patients with communicating hydrocephalus, but none have been prove to be definite. Cerebrospinal fluid (CSF) movement is known not to bulk flow but rather pulsatile flow that develops ...
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