Respiratory Problems in Deep Diving

2015 ◽  
pp. 48-64
Author(s):  
Guy Imbert
Keyword(s):  
Respiratory Problems ◽  
Deep Diving

Public School Voice Clinics, Part II

1984 ◽  
Vol 15 (1) ◽  
pp. 58-64 ◽  
Author(s):  
Sandra Q. Miller ◽  
Charles L. Madison
Keyword(s):  
Public School ◽  
School District ◽  
Voice Therapy ◽  
Respiratory Problems ◽  
Chronic Laryngitis ◽  
Upper Respiratory ◽  
Vocal Nodules

In 10 years of semiannual voice clinics held in a metropolitan school district, 249 cases were reviewed. Attending otolaryngologists diagnosed vocal nodules in 40% of the cases. Chronic laryngitis and thickened cords were also frequently noted. One third of the cases had concomitant allergies, ear, and/or upper respiratory problems. Direct voice therapy was recommended for 65% of those attending voice clinics. The data on sex and age were consistent with previous research. Family voice history and prognosis are also discussed.

Valsalva retinopathy caused by deep diving

2020 ◽  
pp. 58-58
Author(s):  
M.V. Mustaeva-Pavlova ◽  
◽  
E.V. Molchanova ◽  
Keyword(s):  
Deep Diving ◽  
Valsalva Retinopathy

Актуальность. Ретинопатия Вальсальвы выявляется у больных при резком подъеме внутрибрюшного/внутригрудного давления в результате напряжения (маневра Вальсальвы), которое проявляется преимущественно преретинальным кровоизлиянием. Проявления могут возникнуть при глубоководных погружениях, поднятии тяжести, гипербарических пробах, аэробных упражнениях, кашле, рвоте, чихании, запорах. Цель. Обратить внимание офтальмологов на специфику данной патологии: развитие макулярного кровоизлияния вследствие повышения внутрибрюшного/внутригрудного давления, в результате напряжения. Материал и методы. Клинический случай: Пациентка, 14 лет, обратилась с жалобами на снижение зрения, «пятно» перед левым глазом после занятия плаванием, нырянием на глубину, обращение на вторые сутки. Объективно: VISOS = 0,5н/к. Глазное дно слева – кровоизлияние в центре макулярной области диаметром 1/4 PD. ОКТ: крупное, гиперэхогенное образование, во внутренних слоях сетчатки, h~183 мкм, утолщение сетчатки – h~306 мкм, в переднем отделе сетчатки кровоизлияние. Периметрия: центральная скотома левого глаза. Результаты. Через 9,5 месяцев выжидательной тактики: VISOS=1,0. На глазном дне кровоизлияние рассосалось, ОКТ левого глаза: гиперэхогенное образование h~25 мкм. Периметрия: поле зрения в норме. Выводы. Ретинопатия Вальсальвы — состояние, которое протекает благоприятно и не требует терапии. Дифференциальная диагностика должна проводиться с другими ретинопатиями, в том числе, с доброкачественной ретинопатией. Тщательный сбор анамнеза поможет в постановке диагноза и выборе тактики ведения пациента.

RMI 6Al-2Cb-1Ta-0.8Mo

Alloy Digest ◽  
1967 ◽  
Vol 16 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Impact Strength ◽  
Base Alloy ◽  
Heat Treating ◽  
High Impact ◽  
Good Corrosion Resistance ◽  
Deep Diving ◽  
High Impact Strength ◽  
Reactive Metals

Abstract RMI-6A1-2Cb-1Ta-0.8Mo is a titanium-base alloy recommended for parts requiring high impact strength along with good corrosion resistance, especially for deep diving under sea vehicles. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: Ti-53. Producer or source: Reactive Metals Inc..

Fireworks: How to Simulate the Manufacture and Operation in the Atmosphere with the Substitution of Ultrasonic Spray Pyrolysis

2018 ◽  
Vol 15 (2) ◽  
pp. 147-156
Author(s):  
Rebeka Rudolf ◽  
Urban Ferčec ◽  
Mohammed Shariq
Keyword(s):  
Spray Pyrolysis ◽  
Final Section ◽  
Web Of Science ◽  
Raw Materials ◽  
Ultrasonic Spray Pyrolysis ◽  
Physiochemical Properties ◽  
Physical Size ◽  
Respiratory Problems ◽  
Ultrasonic Spray ◽  
Temperature Ranges

Background: This review provides a closer look at recent work in the field of fireworks manufacture, which could see the replacement of micron-sized particles with their nano-scaled counterparts. Moreover, we also discuss micron-sized particles as well as nanoparticles (NPs) from K, Fe, Al, Ti, Ba, etc., that are produced in the atmosphere as a result of these fireworks. One of the possible technological substitutes for fireworks is presented in detail, i.e., the use of ultrasonic spray pyrolysis (USP) technology. Method: We searched Google, Web of Science and PubMed for a literature survey of fireworks and their products: firecrackers, micron-sized and nanoparticles. Moreover, we used some of our own knowledge and experimental data to strengthen the possibility of simulating the synthesis of firework products on the laboratory scale. Results: The use of nano reactants and oxidisers has seen a substantial increase in the sound efficiency and a decrease in the amount of chemicals used, making fireworks more eco-friendly. The application of Al- and Ti-based nano flash powder in the size range from 35 nm to 50 μm resulted in a significant improvement in the ignition properties of the fireworks. Under changing aerodynamic conditions, it is difficult to collect them as samples for real-time monitoring, needed for their characterization or the testing of their harmfulness under laboratory conditions. As a result, NPs below 100 nm in the surroundings could be easily inhaled into the lungs and cause more pulmonary and respiratory problems than micron-sized particles. USP produces nanoparticles in the laboratory that could replace the conventional micron-sized firecracker raw materials, or nanoparticles that are similar to those formed by fireworks. It will also help to identify the physiochemical properties of the airborne particulates in order to understand and evaluate their impact. </P><P> This review could be valuable for a controlled economic synthesis through USP, and in the use of nanopowders in pyrotechnology that could reduce pollution to a great extent, thus contributing to the growth and good practise of the fireworks industry. With respect to the USP synthesis, we have also discussed in detail the physical (size, shape) and chemical (composition) characteristics of Al2O3 and TiO2 NPs from different precursors and their temperature ranges. An in-depth explanation for a comparative analysis for the formation mechanism of nanoparticles through both fireworks and USP is presented in the final section. We can produce nanoparticles in the laboratory with ultrasonic spray pyrolysis that have similar properties to those produced from fireworks and can then be used for further testing.

scholarly journals Hyperventilation in Children with Dengue Hemorrhagic Fever (DHF)

2019 ◽  
Vol 31 (9-10) ◽  
pp. 245-56
Author(s):  
Kasim Y. A. ◽  
Anky Tri Rini K. E. ◽  
Sumarmo S. P. S.
Keyword(s):  
Dengue Hemorrhagic Fever ◽  
Dengue Shock Syndrome ◽  
Hemorrhagic Fever ◽  
Lung Edema ◽  
Respiratory Problems ◽  
Ventilatory Pattern ◽  
Grade Ii ◽  
Plasma Leakage ◽  
The Difference ◽  
Respiratory Disturbance

Many studies of Dengue Hemorrhagic Fever (DHF) have been done but only a few revealed the respiratory status. Respiratory problems arise. because of plasma leakage through the 'damaged capillaries, causing lung edema and in turn result in hypoxemia. This later on will be compensated by a hyperventilation state. During a 6-month-period (May to September 1988), two aspects were studied in 85 patients hospitalized with DHF. First, the ventilatory pattern and second, the result of giving oxygen support in improving the respiratory disturbance, in this case alveolar hyperventilation. The incidence of alveolar hyperventilation in DHF grade II (DHF II) and Dengue Shock Syndrome (DSS) differed significantly. Hypoxemia occurred in DHF II and DSS with no significant differences. The difference of the incidence of metabolic acidosis in DHF II and DSS were significant. In DHF II patients having had hyperventilation state, oxygen therapy decreased respiration rate significantly and increased the PaC02 though not significantly.

scholarly journals A narrative review of the ethnomedicinal usage of Cannabis sativa Linnaeus as traditional phytomedicine by folk medicine practitioners of Bangladesh

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Shahriar S. M. Shakil ◽  
Matt Gowan ◽  
Kerry Hughes ◽  
Md. Nur Kabidul Azam ◽  
Md. Nasir Ahmed
Keyword(s):  
British Empire ◽  
Scientific Literature ◽  
Cannabis Sativa ◽  
Folk Medicine ◽  
Bile Secretion ◽  
Biological Research ◽  
Respiratory Problems ◽  
Search Terms ◽  
Natural Medicine ◽  
Urinary Problems

Abstract Background There is a worldwide interest in the use of Cannabis sativa for biomedicine purposes. Cannabis has ethnomedicinal usage as a natural medicine in Bangladesh and cultivated during the British Empire period for revenues. Objective Folk medicine practitioners (FMPs) from different districts of Bangladesh have been using Cannabis sativa, but until now there have not been any compiled studies particularly regarding this practice. Hence, this review is an effort to retrieve the traditional usage of Cannabis sativa as a phytomedicine from published ethnomedicinal studies. Methods and materials Information was searched by using the search terms “ethnomedicinal Cannabis sativa and Bangladesh”; “Bangladesh cannabaceae and ethnomedicinal survey”; “ganja, bhang and folk medicine Bangladesh”; “tetrahydrocannabinol (THC), cannabinoid and therapeutic, clinical trial”; and “cannabis and pharmacological/biological” and retrieved from ethnobotanical articles available on PubMed, Scopus, Science Direct, and Google Scholar databases. A search of the relevant scientific literature also was conducted to assess the efficacy of the ethnomedicinal usage of Cannabis sativa. Results While reviewing over 200 ethnomedicinal plants’ survey articles, we found that FMPs of Bangladesh from 12 different districts used Cannabis sativa to treat cited ailments like sleep-associated problems (n=5), neuropsychiatric and CNS problems (n=5), and infections and respiratory problems (n=5) followed by rheumatism, gastrointestinal, gynecological (n=4 each), cancer, sexual, and other ailments including hypertension, headache, itch, increases bile secretion, abortifacient, dandruff, fever, and urinary problems (n=1 each). There are a total of 15 formulations identified from the 11 out of 18 ethnomedicinal plant survey reports. The leaf was the main plant part used (53.8%), followed by root (23%), seed (7.7%) and flower, inflorescence, resin, and all parts 3.8% respectively. Conclusions Sales and cultivation of Cannabis are illegal at present in Bangladesh, but the use of Cannabis sativa as a natural phytomedicine has been practiced traditionally by folk medicine practitioners of Bangladesh for many years and validated through relevant pharmacological justification. Although Cannabis sativa possesses ethnomedicinal properties in the folk medicine of Bangladesh, it is, furthermore, needed to conduct biological research to consolidate pharmacological justification about the prospects and challenges of Cannabis and cannabinoids’ use in Bangladesh as safer biomedicine in the future.

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