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https://www.readbyqxmd.com/read/29748980/coordinated-plasticity-maintains-hydraulic-safety-in-sunflower-leaves
#1
Amanda A Cardoso, Timothy J Brodribb, Christopher J Lucani, Fábio M DaMatta, Scott A M McAdam
The air-seeding threshold water potential establishes a hydraulic limit on the ability of woody species to survive in water-limiting environments, but herbs may be more plastic in terms of their ability to adapt to drying conditions. Here we examined the capacity of sunflower (Helianthus annuus L.) leaves to adapt to reduced water availability by modifying the sensitivity of xylem and stomata to soil water deficit. We found that sunflower plants grown under water-limited conditions significantly adjusted leaf osmotic potential, which was linked to a prolongation of stomatal opening as soil dried and a reduced sensitivity of photosynthesis to water-stress induced damage...
May 10, 2018: Plant, Cell & Environment
https://www.readbyqxmd.com/read/29748716/massive-coronary-air-embolism-after-ct-guided-lung-needle-biopsy
#2
E Ornelas, S Fernandez-Vilches, X Gallardo, J Mesquida
No abstract text is available yet for this article.
May 10, 2018: Intensive Care Medicine
https://www.readbyqxmd.com/read/29747705/retrograde-cerebral-venous-air-embolism-on-susceptibility-weighted-imaging
#3
Yunsup Hwang, Young-Joo Kim
No abstract text is available yet for this article.
May 11, 2018: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/29732225/cortical-blindness-and-altered-mental-status-following-routine-hemodialysis-a-case-of-iatrogenic-cerebral-air-embolism
#4
Lawrence Lau, Kory London
Cerebral air embolism is a known complication from a myriad of iatrogenic causes. This case describes a 60-year-old female presenting from hemodialysis with altered mental status, bilateral homonymous hemianopia, and repetitive speech. A noncontrast head CT revealed air in the vein of Galen and the deep cerebral veins of the left thalamus and occipital sulcus, a complication from air being introduced into the patient via improper flushing of dialysis tubing. The retrograde flow of air bubbles in the upright patient during dialysis was likely responsible for the air embolus lodging in the cerebral vasculature...
2018: Case Reports in Emergency Medicine
https://www.readbyqxmd.com/read/29704693/cardiac-arrest-during-spine-surgery-in-the-prone-position-case-report-and-review-of-the-literature
#5
REVIEW
Victor E Staartjes, Shiva A Schillevoort, Patricia G Blum, J Peter van Tintelen, Wouter E Kok, Marc L Schröder
OBJECTIVE: Intraoperative cardiac arrest (CA) is usually attributable to pre-existing disease, or to intraoperative complications. In rare cases, intraoperative stress can demask certain genetic diseases, such as Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT). It is essential that neurosurgeons are aware of the etiologies, risk factors, and initial management of CA during surgery in the prone position. METHODS: We present a case of CA directly after spinal fusion for lumbar spondylolisthesis, and review the literature on cardiac arrests during spinal neurosurgery in the prone position...
April 26, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29704690/a-systematic-review-of-the-semi-sitting-position-in-neurosurgical-patients-with-patent-foramen-ovale-how-frequent-is-paradoxical-embolism
#6
REVIEW
Johann Klein, Tareq A Juratli, Matthias Weise, Gabriele Schackert
The semi-sitting position is preferred in some surgeries of the posterior fossa and the cervical spine. At the same time, it is associated with the risk of air embolism. In the presence of a patent foramen ovale (PFO) with intracardial right-to-left shunt, an air embolism can result in a paradoxical embolism to the heart or brain. It is unclear whether the risk-benefit ratio favors the semi-sitting position in this scenario. Therefore, we conducted a systematic review of the relevant studies published after 2007 by searching the databases PubMed, Science Direct and the Cochrane Database of Systematic Reviews for relevant articles...
April 25, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29704185/the-effect-of-heated-co-2-insufflation-in-minimising-surgical-wound-contamination-during-open-surgery
#7
Monika Baumann, John E Cater
The primary source of infections in open surgeries has been found to be bacteria and viruses carried into the surgical wound on the surfaces of skin particles shed by patients and surgical staff. In open cardiac surgeries, insufflation of the wound with carbon dioxide is used to limit the quantity of air able to enter into the heart, avoiding air embolisms when the heart is restarted. This surgical technique has been evaluated as a method of limiting the number of skin particles able to enter into the wound, using computational fluid dynamics (CFD) simulations and experimental testing...
April 27, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29696503/hyperbaric-oxygen-therapy-of-air-embolus-in-the-cerebral-venous-sinuses-after-intracranial-surgery-a-case-report
#8
Mina Lundborg, Eirik Helseth, Roger Josefsen, Martin Braathen, Karoline Skogen, Jon Ramm-Pettersen
A case with cerebral venous air embolism (CVAE) after neurosurgery and treated with hyperbaric oxygen therapy (HBOT) is presented. This is a rare and potentially fatal complication that neurosurgeons should be aware of. A 52-year-old male was diagnosed with an intracerebral hematoma. An emergency evacuation of the hematoma was performed with a craniotomy and the postoperative CT scan showed a complete evacuation of the hematoma, but it also revealed a CVAE. The patient was immediately referred to HBOT and received three sessions within 48 h...
April 26, 2018: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29691809/standardization-of-simple-auxiliary-method-beneficial-to-total-endoscopic-thyroidectomy-on-patients-with-ptc-based-on-retrospective-study-of-356-cases
#9
Shouyi Yan, Wenxin Zhao, Bo Wang, Liyong Zhang
OBJECTIVE: Total endoscopic thyroidectomy (TET) is paid increasing attention to by patients, especially those with thyroid carcinoma. The aim of this study is to evaluate the clinic feasibility of standardization of simple auxiliary method (SOSAM) involved in operating bed adjustment, location of skin traction points and thyroid retractor points for the TET via bilateral breast approach. METHODS: A retrospective study was performed on 356 patients with thyroid carcinoma, who had undergone the TET...
April 24, 2018: Endocrine
https://www.readbyqxmd.com/read/29685360/incidental-lad-stenosis-identified-on-non-gated-chest-cta
#10
Nicholas Chan, Brian M Yuen, Ji Yang, Stuart L Cohen, Loukas Boutis, John N Makaryus
A 57-year-old male former smoker presented to the Emergency Department (ED) with blurry vision, headache, and generalized weakness. He was hypoxic on room air and ECG showed sinus tachycardia. A CT pulmonary angiogram was ordered in the ED and revealed no pulmonary embolism but incidentally noted a likely significant stenosis in the proximal LAD. Subsequent cardiac catheterization revealed a 90% stenotic lesion with percutaneous coronary intervention leading to symptom resolution. Unlike coronary CTA, CTPA is performed with non-ECG gated helical scanning and generates motion artifacts associated with myocardial contraction...
April 14, 2018: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29682052/venous-air-embolism-during-endoscopic-third-ventriculostomy
#11
Renu Bala, Mihir P Pandia
Neuroendoscopic procedures are increasingly performed nowadays due to the significant technological improvement of endoscopic instrumentation. It carries various advantages such as speed, simplicity, avoidance of implants, and no brain dissection or retraction. Although considered to be safe, it is associated with a host of complications. We hereby report a case of venous air embolism in an infant who was undergoing endoscopic third ventriculostomy. The complication occurred at the completion of surgery when surgeons were withdrawing the endoscope...
April 2018: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/29663388/hydraulic-safety-margins-and-air-seeding-thresholds-in-roots-trunks-branches-and-petioles-of-four-northern-hardwood-trees
#12
Jay W Wason, Katherine S Anstreicher, Nathan Stephansky, Brett A Huggett, Craig R Brodersen
During drought, xylem sap pressures can approach or exceed critical thresholds where gas embolisms form and propagate through the xylem network, leading to systemic hydraulic dysfunction. The vulnerability segmentation hypothesis (VSH) predicts that low-investment organs (e.g. leaf petioles) should be more vulnerable to embolism spread compared to high-investment, perennial organs (e.g. trunks, stems), as a means of mitigating embolism spread and excessive negative pressures in the perennial organs. We tested this hypothesis by measuring air-seeding thresholds using the single-vessel air-injection method and calculating hydraulic safety margins in four northern hardwood tree species of the northeastern United States, in both saplings and canopy height trees, and at five points along the soil-plant-atmosphere continuum...
April 16, 2018: New Phytologist
https://www.readbyqxmd.com/read/29643632/venous-gas-embolism-in-operative-hysteroscopy-a-devastating-complication-in-a-relatively-simple-surgery
#13
Amit Verma, Madhu Pandey Singh
Venous air embolism can be a catastrophic iatrogenic complication during operative hysteroscopy and makes this simple surgical procedure very risky, especially with the lack of knowledge about its prevention, presentation, and immediate management. Three out of 13 hysteroscopic myoma resections at our center had venous gas embolism (VGE). The prevention, diagnosis, and management of VGE are described in this report of three cases.
January 2018: Journal of Anaesthesiology, Clinical Pharmacology
https://www.readbyqxmd.com/read/29643111/cardiovascular-and-cerebrovascular-emergency-department-visits-associated-with-wildfire-smoke-exposure-in-california-in-2015
#14
Zachary S Wettstein, Sumi Hoshiko, Jahan Fahimi, Robert J Harrison, Wayne E Cascio, Ana G Rappold
BACKGROUND: Wildfire smoke is known to exacerbate respiratory conditions; however, evidence for cardiovascular and cerebrovascular events has been inconsistent, despite biological plausibility. METHODS AND RESULTS: A population-based epidemiologic analysis was conducted for daily cardiovascular and cerebrovascular emergency department (ED) visits and wildfire smoke exposure in 2015 among adults in 8 California air basins. A quasi-Poisson regression model was used for zip code-level counts of ED visits, adjusting for heat index, day of week, seasonality, and population...
April 11, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29628594/an-unusual-case-of-a-parturient-with-uncorrected-pentalogy-of-fallot-presenting-for-elective-cesarean-section-delivery-of-twins
#15
Ying Ci Ho, Sek Koon Boey, Abey Matthew Varughese Mathews, Hooi Geok See, Nian Chih Hwang
We present a 31-year-old primigravida with uncorrected pentalogy of Fallot, pregnant with monochorionic-diamniotic twins, undergoing elective lower segment cesarean section at 36 weeks gestation. Preoperative workup included a transthoracic echocardiogram which revealed a large ventricular septal defect of 1.8 cm with bidirectional shunting, a moderate size atrial septal defect of 1.8 cm with predominant left-to-right shunting, an overriding aorta, moderate right ventricular hypertrophy, and severe pulmonary valve stenosis...
January 2018: Anesthesia, Essays and Researches
https://www.readbyqxmd.com/read/29622408/the-use-of-a-magnetic-port-finder-in-the-retrieval-of-air-rifle-bbs-to-the-upper-extremity
#16
Elizabeth Kiwanuka, Sun Hsieh, Lauren Ouellet Roussel, Charles Christopher Jehle, Raman Mehrzad, Scott Schmidt
Air-powered rifles shoot ball bearings with enough kinetic energy to penetrate skin and fracture underlying bones. In addition, there are reports of these ball bearings embolizing within the vascular network, causing serious injuries such as ischemic stroke with resultant blindness. The severity of these complications warrants occasional removal of these foreign bodies; however, they can be difficult to localize. In this case report, we describe the use of a magnetic port finder, a sterilizable tool used in breast reconstruction, to localize the foreign body in situ...
April 3, 2018: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29614893/cerebral-artery-gas-embolism-following-navigational-bronchoscopy
#17
Keren Fogelfeld, Richie K Rana, Guy W Soo Hoo
INTRODUCTION: Cerebral artery gas embolism (CAGE) is a rare but serious adverse event with potentially devastating neurologic sequelae. Bronchoscopy is a frequently performed procedure but with only a few reported cases of CAGE. METHODS: We report the first documented case of CAGE associated with electromagnetic navigational bronchoscopy. RESULTS: A 61-year-old man with a left lower lobe nodule underwent electromagnetic navigational bronchoscopy...
January 1, 2018: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/29613995/perforation-of-a-peptic-ulcer-in-a-hiatal-hernia-into-the-left-ventricle-with-systemic-air-and-food-embolism
#18
Ikumi Igarashi, Keishi Suzuki, Fumi Hosono, Azusa Ichinose, Shoko Abe, Akira Sugiyama, Yasutomo Sekido
Perforation of a peptic ulcer into the ventricle is uncommon, and the definitive diagnosis is difficult in living patients. We herein report a case of perforation of a peptic ulcer in a hiatal hernia into the left ventricle with systemic air and food embolism. This is the first case report of the perforation diagnosed by computed tomography and confirmed by autopsy. Computed tomography was useful for the diagnosis of perforation into the ventricle.
April 2, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29600106/systemic-air-embolism-after-computed-tomography-guided-hook-wire-localization-two-case-reports-and-literature-review
#19
Jung Hoon Yi, Pil Jo Choi, Jung Hee Bang, Sang Seok Jeong, Joo Hyun Cho
Computed tomography (CT)-guided hook wire localization is often used to identify small nodules prior to video-assisted thoracoscopic surgery (VATS). Pneumothorax, intrapulmonary hemorrhage, and wire dislodgement are well-known complications associated with the former procedure, but systemic air embolism (SAE) is an extremely rare and potentially fatal complication. We encountered two cases of SAE; one patient showed neurologic symptoms, whereas the other did not. With the patient in the supine position, 100% oxygen was inhaled via a face mask...
January 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29597221/technical-complications-of-continuous-renal-replacement-therapy
#20
Zaccaria Ricci, Stefano Romagnoli
Continuous renal replacement therapy (CRRT) is commonly applied in critically ill patients affected by severe acute kidney injury for solute and volume control and to optimize acid-base and electrolytes balance. Although CRRT represents a life-saving procedure for these patients, it is a representation of a non-physiologic artificial kidney and the potential benefits of the treatment could be hampered by clinical and technical side effects. Different parts of the CRRT system can be a source of technical complications...
2018: Contributions to Nephrology
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