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Intra-cranial pressure

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https://www.readbyqxmd.com/read/27909604/effects-of-head-position-on-cerebral-oxygenation-and-blood-flow-velocity-during-thyroidectomy
#1
Ayten Saraçoğlu, Demet Altun, Ayşen Yavru, Nihat Aksakal, İsmail Cem Sormaz, Emre Camcı
OBJECTIVE: Determining the blood flow through intra and extra-cranial arteries during neck extension may be helpful but is a controversial issue. We aimed to elucidate the changes in cerebral blood flow related to head positioning during thyroid surgery by carotid Doppler examination and regional oxygen saturation variations. METHODS: Thirty patients were recruited to the study. Patients were positioned with a final position of thyroidectomy consisting a 30° semi Fowler with the extension of neck and head...
October 2016: Turkish Journal of Anaesthesiology and Reanimation
https://www.readbyqxmd.com/read/27836704/perioperative-risk-assessment-of-patients-with-gliomatosis-cerebri
#2
Nir Shimony, Ben Shofty, Zvi Ram, Rachel Grossman
BACKGROUND: Gliomatosis-cerebri (GC) is a rare diffusely infiltrating malignant glial neoplasm. Presenting symptoms may include seizures, neurological deficits, and not infrequently, symptoms related to increased intra-cranial pressure(ICP). Surgical intervention, including brain biopsy may induce worsening of these neurological symptoms. We reviewed our database to identify prognostic and risk factors for peri-operative deterioration specifically associated with elevated ICP. METHODS: Between 2006-2014 seventy-eight patients were treated for GC...
November 8, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27832503/estimating-the-accuracy-of-optic-nerve-sheath-diameter-measurement-using-a-pocket-sized-handheld-ultrasound-on-a-simulation-model
#3
Garrett G R J Johnson, Frederick A Zeiler, Bertram Unger, Gregory Hansen, Dimitrios Karakitsos, Lawrence M Gillman
BACKGROUND: Ultrasound measurement of optic nerve sheath diameter (ONSD) appears to be a promising, rapid, non-invasive bedside tool for identification of elevated intra-cranial pressure. With improvements in ultrasound technology, machines are becoming smaller; however, it is unclear if these ultra-portable handheld units have the resolution to make these measurements precisely. In this study, we estimate the accuracy of ONSD measurement in a pocket-sized ultrasound unit. METHODS: Utilizing a locally developed, previously validated model of the eye, ONSD was measured by two expert observers, three times with two machines and on five models with different optic nerve sheath sizes...
December 2016: Critical Ultrasound Journal
https://www.readbyqxmd.com/read/27810603/overdrainage-after-ventriculoperitoneal-shunting-in-a-patient-with-a-wide-depressed-skull-bone-defect-the-effect-of-atmospheric-pressure-gradient
#4
Lixiang Zhou, Jinlu Yu, Lichao Sun, Yanwu Han, Guangming Wang
INTRODUCTION: In patients with traumatic brain injury, an effective approach for managing refractory intracranial hypertension is wide decompressive craniectomy. Postoperative hydrocephalus is a frequent complication requiring cerebrospinal fluid (CSF) diversion. PRESENTATION OF CASE: A 50-year-old male who underwent decompressive craniectomy after traumatic brain injury. He developed hydrocephalus postoperatively, and accordingly we placed a ventriculoperitoneal shunt...
October 15, 2016: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/27672280/clinical-management-of-acute-liver-failure-results-of-an-international-multi-center-survey
#5
Liane Rabinowich, Julia Wendon, William Bernal, Oren Shibolet
AIM: To assess the practice of caring for acute liver failure (ALF) patients in varying geographic locations and medical centers. METHODS: Members of the European Acute Liver Failure Consortium completed an 88-item questionnaire detailing management of ALF. Responses from 22 transplantation centers in 11 countries were analyzed, treating between 300 and 500 ALF cases and performing over 100 liver transplants (LT) for ALF annually. The questions pertained to details of the institution and their clinical activity, standards of care, referral and admission, ward- based care versus intensive care unit (ICU) as well as questions regarding liver transplantation - including criteria, limitations, and perceived performance...
September 7, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27644335/telemetric-intra-cranial-pressure-monitoring-clinical-and-financial-considerations
#6
James M Barber, Catherine J Pringle, Helen Raffalli-Ebezant, Omar Pathmanaban, Roberto Ramirez, Ian D Kamaly-Asl
Intracranial pressure (ICP) measurement is an important diagnostic tool in Neurosurgery. Until relatively recently, conventional monitoring has required that subjects be admitted to a hospital bed and the device is only able to be left in-situ for limited periods of time. We have evaluated a Telemetric ICP monitoring system that has been proven, by several other groups worldwide, to permit rapid, repeated and prolonged ICP measurement, in multiple environments. In our unit, 4 patients have been implanted to-date, between the ages of 4 and 16, manifesting a wide range of complex neurosurgical conditions...
September 19, 2016: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/27537518/comparison-of-nirs-serum-biomarkers-and-muscle-damage-in-a-porcine-balloon-compression-model-of-acute-compartment-syndrome
#7
Steven C Budsberg, Michael S Shuler, Megan Hansen, Elizabeth Uhl, Brett A Freedman
BACKGROUND: Near-infrared spectroscopy (NIRS) has been shown to aid in the diagnosis of extremity acute compartment syndrome (ACS), offering continuous real-time capability to monitor perfusion in extremities. Porcine models of ACS have been developed to attempt to aid in the understanding of the development of ACS and provide better methods of diagnosing ACS. The objective of the present study was to assess and correlate NIRS, tibial intracompartmental pressure (TICP), tibial intracompartmental perfusion pressure (TIPP), serum markers of inflammation and muscle injury in a balloon compression model of ACS...
November 2016: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/27501699/a-unique-method-for-estimating-the-reliability-learning-curve-of-optic-nerve-sheath-diameter-ultrasound-measurement
#8
Frederick A Zeiler, Markus T Ziesmann, Patrick Goeres, Bertram Unger, Jason Park, Dimitrios Karakitsos, Michael Blaivas, Ashley Vergis, Lawrence M Gillman
BACKGROUND: Optic nerve sheath diameter (ONSD) measurement using ultrasound has been proposed as a rapid, non-invasive, point of care technique to estimate intra-cranial pressure (ICP). Ultrasonic measurement of the optic nerve sheath can be quite challenging and there is limited literature surrounding learning curves for this technique. We attempted to develop a method to estimate the reliability learning curve for ONSD measurement utilizing a unique definition of reliability: a plateau in within-subject variability with unchanged between-subject variability...
December 2016: Critical Ultrasound Journal
https://www.readbyqxmd.com/read/27332553/reduced-leukocyte-infiltration-in-absence-of-eosinophils-correlates-with-decreased-tissue-damage-and-disease-susceptibility-in-%C3%AE-dblgata-mice-during-murine-neurocysticercosis
#9
Pramod K Mishra, Qun Li, Luis E Munoz, Chris A Mares, Elizabeth G Morris, Judy M Teale, Astrid E Cardona
Neurocysticercosis (NCC) is one of the most common helminth parasitic diseases of the central nervous system (CNS) and the leading cause of acquired epilepsy worldwide. NCC is caused by the presence of the metacestode larvae of the tapeworm Taenia solium within brain tissues. NCC patients exhibit a long asymptomatic phase followed by a phase of symptoms including increased intra-cranial pressure and seizures. While the asymptomatic phase is attributed to the immunosuppressive capabilities of viable T. solium parasites, release of antigens by dying organisms induce strong immune responses and associated symptoms...
June 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27295175/a-modification-of-endoscopic-endonasal-approach-for-management-of-encephaloceles-in-sphenoid-sinus-lateral-recess
#10
M N El-Tarabishi, S A Fawaz, S M Sabri, M M El-Sharnobi, Ahmed Sweed
Spontaneous cerebrospinal fluid leak with meningoencephaloceles in sphenoid sinus lateral recess is challenging. Transnasal visualization of this area is difficult, especially when large pneumatization is present. External approaches to this region involve aggressive surgery and are often associated with significant morbidity. The aim of this study is to assess the real effectiveness of a modification of the endoscopic endonasal approach for their management. This is a prospective case series study and was conducted at Otolaryngology department, Ain Shams University Hospitals, Cairo, Egypt...
June 13, 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27172364/intra-cranial-mechanisms-for-preserving-brain-blood-flow-in-health-and-disease
#11
Fiona D McBryde, Simon C Malpas, Julian Fr Paton
The brain is an exceptionally energetically demanding organ with little metabolic reserve, and multiple systems operate to protect and preserve the brain blood supply. But how does the brain sense its own perfusion? In this review, we discuss how the brain may harness the cardiovascular system to counter threats to cerebral perfusion sensed via intracranial pressure (ICP), cerebral oxygenation and ischemia. Since the work of Cushing over 100 years ago, the existence of brain baroreceptors capable of eliciting increases in sympathetic outflow and blood pressure has been hypothesized...
May 12, 2016: Acta Physiologica
https://www.readbyqxmd.com/read/26980000/a-multicentre-randomized-controlled-trial-of-moderate-hypothermia-to-prevent-intracranial-hypertension-in-acute-liver-failure
#12
William Bernal, Nicholas Murphy, Sarah Brown, Tony Whitehouse, Peter Nissen Bjerring, John Hauerberg, Hans J Frederiksen, Georg Auzinger, Julia Wendon, Fin Stolze Larsen
BACKGROUND & AIMS: Animal models and human case series of acute liver failure (ALF) suggest moderate hypothermia (MH) to have protective effects against cerebral oedema (CO) development and intracranial hypertension (ICH). However, the optimum temperature for patient management is unknown. In a prospective randomized controlled trial we investigated if maintenance of MH prevented development of ICH in ALF patients at high risk of the complication. METHODS: Patients with ALF, high-grade encephalopathy and intracranial pressure (ICP) monitoring in specialist intensive care units were randomized by sealed envelope to targeted temperature management (TTM) groups of 34°C (MH) or 36°C (control) for a period of 72h...
August 2016: Journal of Hepatology
https://www.readbyqxmd.com/read/26971794/can-intracranial-pressure-be-measured-non-invasively-bedside-using-a-two-depth-doppler-technique
#13
Lars-Owe D Koskinen, Jan Malm, Rolandas Zakelis, Laimonas Bartusis, Arminas Ragauskas, Anders Eklund
Measurement of intracranial pressure (ICP) is necessary in many neurological and neurosurgical diseases. To avoid lumbar puncture or intracranial ICP probes, non-invasive ICP techniques are becoming popular. A recently developed technology uses two-depth Doppler to compare arterial pulsations in the intra- and extra-cranial segments of the ophthalmic artery for non-invasive estimation of ICP. The aim of this study was to investigate how well non-invasively-measured ICP and invasively-measured cerebrospinal fluid (CSF) pressure correlate...
March 14, 2016: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/26956742/induced-hypernatraemia-is-protective-in-acute-lung-injury
#14
Shailesh Bihari, Dani-Louise Dixon, Mark D Lawrence, Andrew D Bersten
BACKGROUND: Sucrose induced hyperosmolarity is lung protective but the safety of administering hyperosmolar sucrose in patients is unknown. Hypertonic saline is commonly used to produce hyperosmolarity aimed at reducing intra cranial pressure in patients with intracranial pathology. Therefore we studied the protective effects of 20% saline in a lipopolysaccharide lung injury rat model. 20% saline was also compared with other commonly used fluids. METHODS: Following lipopolysaccharide-induced acute lung injury, male Sprague Dawley rats received either 20% hypertonic saline, 0...
June 15, 2016: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/26802870/hybrid-operating-room-for-combined-neuroendovascular-and-endoscopic-treatment-of-ruptured-cerebral-aneurysms-with-intraventricular-hemorrhage
#15
Ryosuke Mori, Ichiro Yuki, Ikki Kajiwara, Yuichiro Nonaka, Toshihiro Ishibashi, Kostadin Karagiozov, Chiheb Dahmani, Yuichi Murayama
BACKGROUND: Intraventricular hemorrhages (IVHs) caused by ruptured cerebral aneurysms often have poor outcomes. Treatment challenges include comorbidities, increased intracranial pressure caused by IVH, and risk of rebleeding. CASE DESCRIPTION: Two cases of severe IVH accompanied by acute hydrocephalus caused by ruptured aneurysm were treated with coil embolization followed by endoscopic hematoma evacuation as a single treatment session in a hybrid operating room (OR) equipped with a multipurpose angio biplane system...
May 2016: World Neurosurgery
https://www.readbyqxmd.com/read/26256657/portal-vein-anatomy-in-the-dog-comparison-between-computed-tomographic-angiography-cta-and-intraoperative-mesenteric-portovenography-iomp
#16
COMPARATIVE STUDY
A T Parry, R N White
OBJECTIVES: To compare and contrast the findings of intra-operative mesenteric portovenography (IOMP) and computed tomography angiography (CTA) for the visualisation and identification of the extrahepatic and intrahepatic portal venous system in the normal dog. METHODS: Retrospective study of dogs with raised post-prandial bile acids concentrations, normal portal venous pressures and grossly normal portal vasculature that had undergone both CTA and IOMP was performed...
November 2015: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/26167031/pneumocephalus-in-cerebellopontine-angle-and-meningitis-secondary-to-chronic-otitis-media-in-a-child
#17
Shailendra Ratre, Yadram Yadav, Sushma Choudhary, Vijay Parihar, Yatin Kher, Ketan Hedaoo
Pneumocephalus is a rare complication of chronic otitis media. Despite its rarity intra-cranial air carries a potential risk of increased intra-cranial pressure or meningitis, which requires immediate therapy. A 10-year-old child presented to us with complaints of fever, headache, vomiting, and decreased hearing from left ear. He had history of left ear discharge since 2 years. Clinical examination revealed neck rigidity and left chronic otitis media. Contrast enhanced computed axial tomography scan of head [Figures 1 and 2] showed pneumocephalus in left cerebellopontine angle, opacification of left middle ear and nonpneumatisation of left mastoid...
July 2015: Journal of Neurosciences in Rural Practice
https://www.readbyqxmd.com/read/26036249/impact-of-ccsvi-on-cerebral-haemodynamics-a-mathematical-study-using-mri-angiographic-and-flow-data
#18
L O Müller, E F Toro, E M Haacke, D Utriainen
BACKGROUND: The presence of abnormal anatomy and flow in neck veins has been recently linked to neurological diseases. The precise impact of extra-cranial abnormalities such as stenoses remains unexplored. METHODS: Pressure and velocity fields in the full cardiovascular system are computed by means of a global mathematical model that accounts for the relationship between pulsating cerebral blood flow and intracranial pressure. RESULTS: Our model predicts that extra-cranial strictures cause increased pressure in the cerebral venous system...
June 2016: Phlebology
https://www.readbyqxmd.com/read/25829905/comparison-of-intraoperative-brain-condition-hemodynamics-and-postoperative-recovery-between-desflurane-and-sevoflurane-in-patients-undergoing-supratentorial-craniotomy
#19
Surya Kumar Dube, Mihir Prakash Pandia, Arvind Chaturvedi, Parmod Bithal, Hari Hara Dash
BACKGROUND: Post operative recovery has been reported to be faster with desflurane than sevoflurane anesthesia in previous studies. The use of desflurane is often criticized in neurosurgery due to the concerns of cerebral vasodilation and increase in ICP and studies comparing desflurane and sevoflurane in neurosurgey are scarce. So we compared the intraoperative brain condition, hemodynamics and postoperative recovery in patients undergoing elective supratentorial craniotomy receiving either desflurane or sevoflurane...
April 2015: Saudi Journal of Anaesthesia
https://www.readbyqxmd.com/read/25769945/suction-power-output-and-the-inertial-cost-of-rotating-the-neurocranium-to-generate-suction-in-fish
#20
Sam Van Wassenbergh, Steven W Day, L Patricia Hernández, Timothy E Higham, Tyler Skorczewski
To expand the buccal cavity, many suction-feeding fishes rely on a considerable contribution from dorsal rotation of the dorsal part of the head including the brains, eyes, and several bones forming the braincase and skull roof (jointly referred to as the neurocranium). As the neurocranium takes up a large part of the total mass of the head, this rotation may incur a considerable inertial cost. If so, this would suggest a significant selective pressure on the kinematics and mass distribution of the neurocranium of suction feeders...
May 7, 2015: Journal of Theoretical Biology
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