keyword
MENU ▼
Read by QxMD icon Read
search

pupil dilation

keyword
https://www.readbyqxmd.com/read/28542663/-periorbital-pallor-post-application-of-mydriatic-in-infants-with-hydrocephalus-associated-to-systemic-effects
#1
Jorge Luis Alvarado Socarras, Sandra Consuelo Rodríguez
Adequate pupil dilation is needed to evaluate some neonates at risk of developing illness during this stage. However, this procedure is not free of adverse effects, either local or systemic. One of these complications is the local vasoconstriction of the preterm baby’s skin following the application of mydriatic eye drops. OBJECTIVE: To describe secondary local and systemic complications of pharmacological pupil dilation in 2 newborns. Clinical case 1: Full term baby with diagnosis of low-birth weight and hydrocephalia...
April 2017: Revista Chilena de Pediatría
https://www.readbyqxmd.com/read/28540019/ultrawide-field-imaging-in-uveitic-non-dilating-pupils
#2
Koushik Tripathy, Rohan Chawla, Pradeep Venkatesh, Yog Raj Sharma, Rajpal Vohra
No abstract text is available yet for this article.
April 2017: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/28528120/objective-evaluation-of-corneal-and-lens-clarity-in-children-with-type-1-diabetes-mellitus
#3
Kemal Tekin, Merve Inanc, Erdal Kurnaz, Elvan Bayramoglu, Emre Aydemir, Mustafa Koc, Zehra Aycan
PURPOSE: To investigate whether abnormal glucose metabolism and duration of diabetes mellitus (DM) affected the corneal and lens clarity in children with well-controlled Type 1 DM and to compare the results obtained with those in healthy children. DESIGN: Cross-sectional prospective study. METHODS: This multicenter study enrolled 56 patients with DM and 51 control subjects. The duration of DM and the glycosylated hemoglobin (HbA1c) levels of the patients in the DM group were recorded...
May 17, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28528076/systematic-review-can-non-mydriatic-cameras-accurately-detect-diabetic-retinopathy
#4
REVIEW
Chloe Bedard, Siying Sherry Liu, Christopher Patterson, Hertzel Gerstein, Lauren Griffith
AIMS: Diabetes puts many individuals at risk for developing diabetic retinopathy (DR). Non-mydriatic (NM) retinal photography without pharmacological pupil dilation can be used to detect DR, however, its value in a general clinical setting has not been established. The objective of this review is to evaluate the validity of NM retinal photos, as compared to the reference standard of seven standard stereoscopic 30 degree field photographs (7SF), for their use of detecting DR in community-dwelling adults...
May 10, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28524817/functional-dissociation-of-stimulus-intensity-encoding-and-predictive-coding-of-pain-in-the-insula
#5
Stephan Geuter, Sabrina Boll, Falk Eippert, Christian Büchel
The computational principles by which the brain creates a painful experience from nociception are still unknown. Classic theories suggest that cortical regions either reflect stimulus intensity or additive effects of intensity and expectations, respectively. By contrast, predictive coding theories provide a unified framework explaining how perception is shaped by the integration of beliefs about the world with mismatches resulting from the comparison of these believes against sensory input. Using functional magnetic resonance imaging during a probabilistic heat pain paradigm, we investigated which computations underlie pain perception...
May 19, 2017: ELife
https://www.readbyqxmd.com/read/28516453/dba-2j-mouse-model-for-experimental-glaucoma-pitfalls-and-problems
#6
Anita J Turner, Roshana Vander Wall, Vivek Gupta, Alex Klistorner, Stuart L Graham
PURPOSE: The DBA/2J mouse has been described as a model for congenital experimental glaucoma. It develops anterior segment anomalies with synechiae and pigment dispersion leading to raised intraocular pressure (IOP) and glaucomatous damage. However there are serious practical considerations when using this model in longitudinal studies. METHODS: We followed 118 mice from 12 - 48 weeks of age in a pharmaceutical trial. Here we report on the findings in control animals (n=37)...
May 18, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/28515685/pupillary-response-to-negative-emotional-stimuli-is-differentially-affected-in-meditation-practitioners
#7
Alejandra Vasquez-Rosati, Enzo P Brunetti, Carmen Cordero, Pedro E Maldonado
Clinically, meditative practices have become increasingly relevant, decreasing anxiety in patients and increasing antibody production. However, few studies have examined the physiological correlates, or effects of the incorporation of meditative practices. Because pupillary reactivity is a marker for autonomic changes and emotional processing, we hypothesized that the pupillary responses of mindfulness meditation practitioners (MP) and subjects without such practices (non-meditators (NM)) differ, reflecting different emotional processing...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28505505/measuring-listening-related-effort-and-fatigue-in-school-aged-children-using-pupillometry
#8
Ronan McGarrigle, Piers Dawes, Andrew J Stewart, Stefanie E Kuchinsky, Kevin J Munro
Stress and fatigue from effortful listening may compromise well-being, learning, and academic achievement in school-aged children. The aim of this study was to investigate the effect of a signal-to-noise ratio (SNR) typical of those in school classrooms on listening effort (behavioral and pupillometric) and listening-related fatigue (self-report and pupillometric) in a group of school-aged children. A sample of 41 normal-hearing children aged 8-11years performed a narrative speech-picture verification task in a condition with recommended levels of background noise ("ideal": +15dB SNR) and a condition with typical classroom background noise levels ("typical": -2dB SNR)...
May 12, 2017: Journal of Experimental Child Psychology
https://www.readbyqxmd.com/read/28489642/pupillary-reflex-for-evaluation-of-thoracic-paravertebral-block-a-prospective-observational-feasibility-study
#9
Baptiste Duceau, Mélanie Baubillier, Gaëlle Bouroche, Aline Albi-Feldzer, Christian Jayr
BACKGROUND: Although thoracic paravertebral block (TPVB) is recommended in major breast surgery, there is no gold standard to assess the success of TPVB. Pupillary dilation reflex (PDR) is the variation of the pupillary diameter after a noxious stimulus. The objective was to evaluate the feasibility of recording the PDR to assess analgesia in an anesthetized thoracic dermatome after TPVB. METHODS: This prospective, observational, single-center study included 32 patients requiring breast surgery under general anesthesia and TPVB...
May 4, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28481033/sympathetic-ans-modulation-of-pupil-diameter-in-emotional-scene-perception-effects-of-hedonic-content-brightness-and-contrast
#10
Margaret M Bradley, Rosemarie G Sapigao, Peter J Lang
A series of studies investigated the effects of hedonic content, brightness, and contrast on pupil diameter during free viewing of natural scenes, assessing the amplitude of the initial light reflex and subsequent sustained pupil diameter change. Hedonic picture content varied from highly arousing scenes of erotica and violence to scenes depicting nature, babies, loss, contamination, food, and more. Despite equivalent overall picture brightness and contrast, pupil diameter still varied as a function of the local brightness of central vision at fixation...
May 8, 2017: Psychophysiology
https://www.readbyqxmd.com/read/28464660/pupillometry-shows-the-effort-of-auditory-attention-switching
#11
Daniel R McCloy, Bonnie K Lau, Eric Larson, Katherine A I Pratt, Adrian K C Lee
Successful speech communication often requires selective attention to a target stream amidst competing sounds, as well as the ability to switch attention among multiple interlocutors. However, auditory attention switching negatively affects both target detection accuracy and reaction time, suggesting that attention switches carry a cognitive cost. Pupillometry is one method of assessing mental effort or cognitive load. Two experiments were conducted to determine whether the effort associated with attention switches is detectable in the pupillary response...
April 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28464266/increased-pupil-dilation-to-angry-faces-predicts-interpersonal-stress-generation-in-offspring-of-depressed-mothers
#12
Cope Feurer, Katie L Burkhouse, Greg Siegle, Brandon E Gibb
BACKGROUND: Interpersonal stress generation is one mechanism hypothesized to increase risk for the intergenerational transmission of depression. Although there is some evidence of stress generation in offspring of depressed mothers, specific predictors of stress generation in these youth remain unknown. The goal of this study was to examine a peripheral measure of cognitive-affective reactivity (i.e. pupil dilation) to emotional interpersonal stimuli as a predictor of stress generation in offspring of depressed mothers...
May 2, 2017: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/28452849/ipilimumab-induced-guillain-barr%C3%A3-syndrome-presenting-as-dysautonomia-an-unusual-presentation-of-a-rare-complication-of-immunotherapy
#13
W Kelly Wu, Kristy K Broman, Evan R Brownie, Rondi M Kauffmann
Immune-related adverse events are common and well-documented in patients treated with ipilimumab, a cytotoxic T-lymphocyte antigen-4 monoclonal antibody approved for the treatment of metastatic and stage III melanoma. Neurological complications are rare, but widely variable and potentially devastating. Here, we discuss a case of a patient who was treated with a single dose of ipilimumab for resected stage III melanoma. She subsequently developed pandysautonomia that manifested as a tonically dilated pupil, gastrointestinal dysmotility, urinary retention, and profound orthostatic hypotension...
June 2017: Journal of Immunotherapy
https://www.readbyqxmd.com/read/28435989/aggressive-medical-management-of-acute-traumatic-subdural-hematomas-before-emergency-craniotomy-in-patients-presenting-with-bilateral-unreactive-pupils-a-cohort-study
#14
Arturo Chieregato, Alessandra Venditto, Emanuele Russo, Costanza Martino, Giovanni Bini
BACKGROUND: The outcome of patients with severe traumatic brain injury (TBI) and acute traumatic subdural hematoma (aSDH) admitted to the emergency room with bilaterally dilated, unreactive pupils (bilateral mydriasis) is notoriously poor. METHODS: Of 2074 TBI patients consecutively admitted to our facility between 1997 and 2012, 115 had a first CT scan with aSDH, unreactive bilateral mydriasis, and a Glasgow Coma Score of 3 or 4. Sixty-two patients were unoperated and died within hours or a few days...
April 24, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28420580/comparative-pharmacodynamic-analysis-of-imidazoline-compounds-using-rat-model-of-ocular-mydriasis-with-a-test-of-quantitative-structure-activity-relationships
#15
Joanna Raczak-Gutknecht, Antoni Nasal, Teresa Frąckowiak, Anita Kornicka, Franciszek Sączewski, Renata Wawrzyniak, Łukasz Kubik, Roman Kaliszan
Imidazol(in)e derivatives, having the chemical structure similar to clonidine, exert diverse pharmacological activities connected with their interactions with alpha2-adrenergic receptors, e.g. hypotension, bradycardia, sedation as well as antinociceptive, anxiolytic, antiarrhythmic, muscle relaxant and mydriatic effects. The mechanism of pupillary dilation observed after systemic administration of imidazol(in)es to rats, mice and cats depends on the stimulation of postsynaptic alpha2-adrenoceptors within the brain...
April 6, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28417841/benign-episodic-unilateral-mydriasis-in-a-flight-nurse
#16
Anthony Schiemer
BACKGROUND: Benign episodic unilateral mydriasis is one cause of anisocoria. This phenomenon is thought to be related to an imbalance between the sympathetic and parasympathetic nervous systems. There is a documented association with migraines, but asymptomatic cases have also been reported. A challenge with all cases is the level of investigation required to exclude more sinister causes of nervous system dysfunction. In a dynamic flight environment, additional considerations need to be made, such as varying light levels and use of night vision devices...
May 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28416927/cataract-surgery-and-possible-complications-in-patients-with-pseudoexfoliation-syndrome
#17
Gulsum Egemen Erkayhan, Semih Dogan
OBJECTIVE: The aim of this study was to evaluate the demographic characteristics and intraoperative complications of cataract surgery in patients with pseudoexfoliation syndrome (PEX). MATERIALS AND METHODS: Cases of 225 eyes (80 eyes with pseudoexfoliation and 145 eyes without pseudoexfoliation as the control group) that underwent phacoemulsification cataract surgery and IOL implantation at the Silifke State Hospital Ophthalmology Clinic between April 2011 and April 2013 were analysed retrospectively...
February 2017: Eurasian Journal of Medicine
https://www.readbyqxmd.com/read/28413125/transient-dysautonomia-in-an-acute-phase-of-encephalopathy-with-biphasic-seizures-and-late-reduced-diffusion
#18
Yuko Ichimiya, Noriyuki Kaku, Yasunari Sakai, Fumiya Yamashita, Wakato Matsuoka, Mamoru Muraoka, Satoshi Akamine, Soichi Mizuguchi, Michiko Torio, Yoshitomo Motomura, Yuichiro Hirata, Yoshito Ishizaki, Masafumi Sanefuji, Hiroyuki Torisu, Hidetoshi Takada, Yoshihiko Maehara, Shouichi Ohga
Paroxysmal sympathetic hyperactivity (PSH) is a dysautonomic condition that is associated with various types of acquired brain injuries. Traumatic brain lesions have been documented as the leading cause of PSH. However, detailed clinical features of pediatric PSH caused by intrinsic brain lesions remain to be elusive. We present a 3-year-old boy, who had been diagnosed as having cerebral palsy, developmental delay and epilepsy after perinatal hypoxia-induced brain injury. He developed status epilepticus with fever on the third day of respiratory infection...
April 13, 2017: Brain & Development
https://www.readbyqxmd.com/read/28396802/a-portable-inexpensive-nonmydriatic-fundus-camera-based-on-the-raspberry-pi%C3%A2-computer
#19
Bailey Y Shen, Shizuo Mukai
Purpose. Nonmydriatic fundus cameras allow retinal photography without pharmacologic dilation of the pupil. However, currently available nonmydriatic fundus cameras are bulky, not portable, and expensive. Taking advantage of recent advances in mobile technology, we sought to create a nonmydriatic fundus camera that was affordable and could be carried in a white coat pocket. Methods. We built a point-and-shoot prototype camera using a Raspberry Pi computer, an infrared-sensitive camera board, a dual infrared and white light light-emitting diode, a battery, a 5-inch touchscreen liquid crystal display, and a disposable 20-diopter condensing lens...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28387821/ipsilateral-pupillary-dilation-following-carotid-endarterectomy-a-temporary-and-benign-phenomenon
#20
Jeffrey A Steinberg, Bob S Carter, Marco B Lee, Gary K Steinberg
BACKGROUND AND IMPORTANCE: Cases of post carotid endarterectomy (CEA) Horner's syndrome have been reported, with symptoms attributed to manipulation of the sympathetic plexus situated along the carotid artery; however, these patients presented with the typical constricted pupil. We report the first 3 cases to our knowledge of mydriasis following CEA. CLINICAL PRESENTATION: We present 3 cases of CEA followed by immediate postoperative development of ipsilateral mydriasis...
April 6, 2017: Neurosurgery
keyword
keyword
117190
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"