keyword
MENU ▼
Read by QxMD icon Read
search

intra-cerebral pressure

keyword
https://www.readbyqxmd.com/read/28258058/impact-of-mild-orthostatic-stress-on-aortic-cerebral-hemodynamic-transmission-insight-from-the-frequency-domain
#1
Jun Sugawara, Tsubasa Tomoto, Tomoko Imai, Seiji Maeda, Shigehiko Ogoh
High cerebral pressure and flow fluctuations could be a risk for future cerebrovascular disease. This study aims to determine whether acute systemic vasoconstriction affects the dynamic pulsatile hemodynamic transmission from the aorta to the brain. We applied a stepwise lower body negative pressure (LBNP) (-10, -20, and -30 mmHg) in 15 young men to induce systemic vasoconstriction. To elucidate the dynamic relationship between the changes in aortic pressure (AoP, estimated from the radial arterial pressure waveforms) and the cerebral blood flow velocity (CBFV) at the middle cerebral artery (via a transcranial Doppler), frequency-domain analysis characterized the beat-to-beat slow oscillation (0...
March 3, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28241129/how-should-we-lower-blood-pressure-after-cerebral-hemorrhage-a-systematic-review-and-meta-analysis
#2
Simona Lattanzi, Claudia Cagnetti, Leandro Provinciali, Mauro Silvestrini
BACKGROUND: The optimal treatment of high blood pressure (BP) after acute intra-cerebral hemorrhage (ICH) is controversial. SUMMARY: The aim of the study was to evaluate the safety and efficacy of early intensive vs. conservative BP lowering treatment in patients with ICH. Randomized controlled trials with active and control groups receiving intensive and conservative BP lowering treatments were identified. The following outcomes were assessed: 3-month mortality and combined death or major disability, 24-h hematoma growth, early neurological deterioration, occurrence of hypotension, severe hypotension, and serious treatment-emergent adverse events...
February 28, 2017: Cerebrovascular Diseases
https://www.readbyqxmd.com/read/28241107/technical-note-development-of-a-cranial-phantom-for-assessing-perfusion-diffusion-and-biomechanics
#3
Naoki Ohno, Tosiaki Miyati, Tomohiro Chigusa, Hikari Usui, Shota Ishida, Yuki Hiramatsu, Satoshi Kobayashi, Toshifumi Gabata, Noam Alperin
PURPOSE: A novel cranial phantom was developed to simulate the relationships among factors such as blood perfusion, water diffusion, and biomechanics in intracranial tissue. METHODS: The cranial phantom consisted of a high-density polypropylene filter (mimicking brain parenchyma) with intra- and extra-filter spaces (mimicking cerebral artery and vein, respectively), and a capacitor space (mimicking the cerebrospinal fluid space). Pulsatile and steady flow with different flow rates were applied to the cranial phantom using a programmable pump...
February 27, 2017: Medical Physics
https://www.readbyqxmd.com/read/28186430/cerebral-blood-flow-frontal-lobe-oxygenation-and-intra-arterial-blood-pressure-during-sprint-exercise-in-normoxia-and-severe-acute-hypoxia-in-humans
#4
David Curtelin, David Morales-Alamo, Rafael Torres-Peralta, Peter Rasmussen, Marcos Martin-Rincon, Mario Perez-Valera, Christoph Siebenmann, Ismael Pérez-Suárez, Evgenia Cherouveim, A William Sheel, Carsten Lundby, José Al Calbet
Cerebral blood flow (CBF) is regulated to secure brain O2 delivery while simultaneously avoiding hyperperfusion; however, both requisites may conflict during sprint exercise. To determine whether brain O2 delivery or CBF is prioritized, young men performed sprint exercise in normoxia and hypoxia (PIO2 = 73 mmHg). During the sprints, cardiac output increased to ∼22 L min(-1), mean arterial pressure to ∼131 mmHg and peak systolic blood pressure ranged between 200 and 304 mmHg. Middle-cerebral artery velocity (MCAv) increased to peak values (∼16%) after 7...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28184351/spontaneous-absorption-of-cerebral-air-embolus-developed-accidentally-during-an-intra-arterial-procedure
#5
Tae Ki Yang
Cerebral arterial air embolism (CAAE), although infrequent, is a complication that can occur at any time during an invasive medical procedure. We experienced two cases of CAAE during cerebral angiography accidentally. The author reports the two cases of CAAE wherein air emboli dissolved spontaneously and immediately under normal atmospheric pressure, not under therapeutic hyperbaric environment. One of the cases shows entire dissolution of the air embolus on the moving image. This report shows that arterial air embolus can be absorbed spontaneously, and air embolus size is one of the factors that influence air embolus dissolution besides hyperbaric oxygen condition...
December 2016: Journal of Cerebrovascular and Endovascular Neurosurgery
https://www.readbyqxmd.com/read/28117180/the-role-of-resuscitative-endovascular-balloon-occlusion-of-the-aorta-reboa-as-an-adjunct-to-acls-in-non-traumatic-cardiac-arrest-a-review-of-key-concepts-physiology-current-evidence-and-future-directions
#6
James Daley, Jonathan James Morrison, John Sather, Lisa Hile
Non-traumatic cardiac arrest is a major public health problem that carries an extremely high mortality rate. If we hope to increase the survivability of this condition, it is imperative that alternative methods of treatment are given due consideration. Balloon occlusion of the aorta can be used as a method of circulatory support in the critically ill patient. Intra-aortic balloon pumps have been used to temporize patients in cardiogenic shock for decades. More recently, resuscitative endovascular balloon occlusion of the aorta (REBOA) has been utilized in the patient in hemorrhagic shock or cardiac arrest secondary to trauma...
January 12, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27909604/effects-of-head-position-on-cerebral-oxygenation-and-blood-flow-velocity-during-thyroidectomy
#7
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/27869301/cerebral-amyloid-deposition-is-associated-with-gait-parameters-in-the-mayo-clinic-study-of-aging
#8
Alexandra M V Wennberg, Rodolfo Savica, Clinton E Hagen, Rosebud O Roberts, David S Knopman, John H Hollman, Prashanthi Vemuri, Clifford R Jack, Ronald C Petersen, Michelle M Mielke
OBJECTIVES: To determine the cross-sectional association between cerebral amyloid-beta (Aβ) deposition and gait. DESIGN: Cross-sectional. SETTING: Population-based cohort study in Olmsted County, MN. PARTICIPANTS: Cognitively normal individuals (n = 611), aged 50 to 69 years, enrolled in the Mayo Clinic Study of Aging with concurrent PiB-PET imaging and gait assessment. Participants with a history of stroke, alcoholism, Parkinson's disease, subdural hematoma, traumatic brain injury, or normal pressure hydrocephalus were excluded...
November 21, 2016: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/27738950/patterns-of-intra-arterial-blood-pressure-monitoring-for-patients-undergoing-total-shoulder-arthroplasty-under-general-anesthesia-a-retrospective-analysis-of-23-073-patients
#9
Rodney A Gabriel, Anair Beverly, Richard P Dutton, Richard D Urman
Total shoulder arthroplasty (TSA) is typically performed in the beach-chair position. Maintenance of adequate mean arterial pressure is required to provide appropriate cerebral perfusion pressure and prevent cerebral ischemia. Placement of an arterial line to facilitate invasive monitoring is discretionary, based on clinical judgment. We aimed to describe patient, surgical and institutional factors associated with the current use of blood pressure monitoring via an arterial line for TSA. We used de-identified patient data from the National Anesthesia Clinical Outcomes Registry between 2010 and 2015 to identify patients undergoing TSA under general anesthesia...
October 13, 2016: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/27733961/simulator-based-angiography-and-endovascular-neurosurgery-curriculum-a-longitudinal-evaluation-of-performance-following-simulator-based-angiography-training
#10
J Scott Pannell, David R Santiago-Dieppa, Arvin R Wali, Brian R Hirshman, Jeffrey A Steinberg, Vincent J Cheung, David Oveisi, Jon Hallstrom, Alexander A Khalessi
This study establishes performance metrics for angiography and neuroendovascular surgery procedures based on longitudinal improvement in individual trainees with differing levels of training and experience. Over the course of 30 days, five trainees performed 10 diagnostic angiograms, coiled 10 carotid terminus aneurysms in the setting of subarachnoid hemorrhage, and performed 10 left middle cerebral artery embolectomies on a Simbionix Angio Mentor™ simulator. All procedures were nonconsecutive. Total procedure time, fluoroscopy time, contrast dose, heart rate, blood pressures, medications administered, packing densities, the number of coils used, and the number of stent-retriever passes were recorded...
August 29, 2016: Curēus
https://www.readbyqxmd.com/read/27695548/a-cost-effectiveness-based-safety-and-efficacy-study-of-resterilized-intra-parenchymal-catheter-based-intracranial-pressure-monitoring-in-developing-world
#11
Deepak Kumar Gupta, Ajay Bisht, Priyam Batra, Purva Mathur, Ashok Kumar Mahapatra
BACKGROUND: The management of traumatic brain injury (TBI) aims to maintain the normal cerebral perfusion in spite of the mass lesions that may occur (haematoma, contusion, and oedema). The monitoring of the intracranial pressure (ICP) is a step in that direction. The intra-parenchymal catheters have the lowest incidence of infection compared to intra-ventricular/subdural catheters with reliable and accurate pressure recordings. The major disadvantage of the intra-parenchymal catheters is the cost, especially in developing nations...
October 2016: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/27668240/blood-pressure-in-acute-intra-cerebral-hemorrhage
#12
COMMENT
Simona Lattanzi, Mauro Silvestrini
No abstract text is available yet for this article.
August 2016: Annals of Translational Medicine
https://www.readbyqxmd.com/read/27557843/decreased-haemodynamic-response-and-decoupling-of-cortical-gamma-band-activity-and-tissue-oxygen-perfusion-after-striatal-interleukin-1-injection
#13
Natasha Bray, Fiona E Burrows, Myles Jones, Jason Berwick, Stuart M Allan, Ingo Schiessl
BACKGROUND: Neurovascular coupling describes the mechanism by which the energy and oxygen demand arising from neuronal activity is met by an increase in regional blood flow, known as the haemodynamic response. Interleukin 1 (IL-1) is a pro-inflammatory cytokine and an important mediator of neuronal injury, though mechanisms through which IL-1 exerts its effects in the brain are not fully understood. In this study, we set out to investigate if increased cerebral levels of IL-1 have a negative effect on the neurovascular coupling in the cortex in response to sensory stimulation...
August 24, 2016: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/27544342/low-dose-intramuscular-diclofenac-sodium-for-fever-control-in-acute-brain-injury
#14
Edoardo Picetti, Franco Servadei, Cristiana Reverberi, Francesca De Carlo, Ilaria Rossi, Marta Velia Antonini, Maria Luisa Caspani
OBJECTIVE: To evaluate the cerebral and hemodynamic effects of low-dose intramuscular diclofenac sodium (DCFS) administered for fever control in patients with acute brain injury in the intensive care unit. METHODS: Inclusion criteria for this prospective clinical study were age ≥18 years; the ability to monitor intra-arterial blood pressure, core body temperature, and intracranial pressure; the placement of an indwelling jugular venous catheter for intermittent jugular venous oxygen saturation measurements; and a core body temperature ≥37...
November 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27403221/use-of-intra-aortic-balloon-pump-counterpulsation-in-patients-with-symptomatic-vasospasm-following-subarachnoid-hemorrhage-and-neurogenic-stress-cardiomyopathy
#15
Fawaz Al-Mufti, Nicholas Morris, Shouri Lahiri, William Roth, Jens Witsch, Iona Machado, Sachin Agarwal, Soojin Park, Philip M Meyers, E Sander Connolly, Jan Claassen
INTRODUCTION: Intra-aortic counterpulsation balloon pumps (IABPs) have been widely used to augment hemodynamics in critically ill patients with cardiogenic shock and have recently been proposed as a management strategy for subarachnoid hemorrhage (SAH) patients with neurogenic stress cardiomyopathy (NSC). Prior case series have described the use of IABP as a means to manage cardiogenic shock in this patient population; however, we sought to describe our experience with IABP as a means to wean vasopressor requirement while augmenting hemodynamics and maintaining pressures at goal...
June 2016: Journal of Vascular and Interventional Neurology
https://www.readbyqxmd.com/read/27349223/local-blood-pressure-associates-with-the-degree-of-luminal-stenosis-in-patients-with-atherosclerotic-disease-in-the-middle-cerebral-artery
#16
Yuanliang Jiang, Wenjia Peng, Zhongzhao Teng, Jonathan H Gillard, Bo Hong, Qi Liu, Jianping Lu
The mechanism underlying atherosclerotic ischemic events within the middle cerebral artery (MCA) is unclear. High structural stress induced by blood pressure might be a potential aetiology as plaque rupture occurs when such mechanical loading exceeds its material strength. To perform reliable analyses quantifying the mechanical loading within a plaque, the local blood pressure is needed. However, data on MCA blood pressure is currently lacking. In this study, the arterial pressure proximal to the stenotic site in the MCA was measured in 15 patients scheduled for intervention...
June 27, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/27346595/pre-and-postoperative-evaluation-of-transcranial-doppler-pulsatility-index-of-the-middle-cerebral-artery-in-patients-with-severe-carotid-artery-stenosis
#17
Umberto Marcello Bracale, Flavia Spalla, Federica Caioni, Domenico Solari, Donatella Narese, Felice Pecoraro, Luca Del Guercio
UNLABELLED: In the management of severe carotid artery stenosis particular importance must be given to the evaluation of the risk of perioperative cerebral ischemic events. Our study analysed the possible relationship between the pre-operative middle cerebral artery Gosling Index, calculated after transcranial Doppler (TCD), and intra-operative stump pressure (SP), in order to identify patients with higher risk of ischemic accidents. Moreover, we studied pre- and post- operative Gosling Index values in association with possible events during follow-up...
2016: Annali Italiani di Chirurgia
https://www.readbyqxmd.com/read/27316915/french-intensive-care-society-international-congress-r%C3%A3-animation-2016
#18
(no author information available yet)
No abstract text is available yet for this article.
June 2016: Annals of Intensive Care
https://www.readbyqxmd.com/read/27251842/laparoscopy-in-children-and-its-impact-on-brain-oxygenation-during-routine-inguinal-hernia-repair
#19
Gloria Pelizzo, Luciano Bernardi, Veronica Carlini, Noemi Pasqua, Simonetta Mencherini, Giuseppe Maggio, Annalisa De Silvestri, Lucio Bianchi, Valeria Calcaterra
BACKGROUND: The systemic impact of intra-abdominal pressure (IAP) and/or changes in carbon dioxide (CO2) during laparoscopy are not yet well defined. Changes in brain oxygenation have been reported as a possible cause of cerebral hypotension and perfusion. The side effects of anaesthesia could also be involved in these changes, especially in children. To date, no data have been reported on brain oxygenation during routine laparoscopy in paediatric patients. PATIENTS AND METHODS: Brain and peripheral oxygenation were investigated in 10 children (8 male, 2 female) who underwent elective minimally invasive surgery for inguinal hernia repair...
January 2017: Journal of Minimal Access Surgery
https://www.readbyqxmd.com/read/27199380/effect-of-negative-pressure-wound-therapy-followed-by-tissue-flaps-for-deep-sternal-wound-infection-after-cardiovascular-surgery-propensity-score-matching-analysis
#20
Akimasa Morisaki, Mitsuharu Hosono, Takashi Murakami, Masanori Sakaguchi, Yasuo Suehiro, Shinsuke Nishimura, Yoshito Sakon, Daisuke Yasumizu, Takumi Kawase, Toshihiko Shibata
OBJECTIVES: Deep sternal wound infection (DSWI) after cardiovascular surgery via median sternotomy remains a severe complication associated with a drastic decrease in the quality of life. We assessed the risk factors for in-hospital death caused by DSWI and the available treatments for DSWI. METHODS: Between January 1991 and August 2015, we retrospectively reviewed 73 patients (51 males and 22 females, mean age 67.5 ± 10.3 years) who developed DSWI after cardiovascular surgery via median sternotomy...
September 2016: Interactive Cardiovascular and Thoracic Surgery
keyword
keyword
43583
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"