Cocaine Abuse That Presents With Acute Scrotal Pain And Mimics Testicular Torsion

Report case (s) relevant aspects: Man, 27 years old, complaining of acute testicular pain by 2 hours in the remaining left testicle. Denies fever, lower urinary tract symptoms such as dysuria, urinary frequency, concommitant or prior urethral discharge to the painful condition. He underwent right orchiectomy 13 years ago by testicular torsion. He is a chronic user of cocaine for 15 years and during the last three days the drug use was continuous and intense. Proposed premise substantiating case (s) description: Initial diagnostic hypothesis: Syndromic: Acute Scrotum Syndrome (SEA) Main Etiologic (testicular torsion) Secondary Etiologic (acute orchiepididymitis) Briefly delineates what might it add? Lines of research That Could be Addressed: In this challenging clinical case we presented an alternative and new etiologic diangosis for the acute scrotum which the main etiologic factor remains testicular torsion. This new diangosis is acute testicular ischemia as a complication of cocaine abuse.4251028103

Combined effect of Zeeman splitting and spin-orbit interaction on the Josephson current in a S-2DEG-S structure

We analyze new spin effects in current-carrying state of superconductor-2D electron gas-superconductor (S-2DEG-S) device with spin-polarized nuclei in 2DEG region. The hyperfine interaction of 2D electrons with nuclear spins, described by the effective magnetic field B, produces Zeeman splitting of Andreev levels without orbital effects, that leads to the interference pattern of supercurrent oscillations over B. The spin-orbit effects in 2DEG cause strongly anisotropic dependence of the Josephson current on the direction of B, which may be used as a probe for the spin-orbit interaction intensity. Under certain conditions, the system reveals the properties of pi-junction.Comment: 4 pages, 4 figure

Is the magnetic field necessary for the Aharonov-Bohm effect in mesoscopics?

A new class of topological mesoscopic phenomena in absence of external magnetic field (meso-nucleo-spinics)is predicted, which is based on combined action of the nonequilibrium nuclear spin population and charge carriers spin-orbit interaction . As an example, we show that Aharonov-Bohm like oscillations of the persistent current in GaAs/AlGaAs based mesoscopic rings may exist, in the absence of the external magnetic field, provided that a topologically nontrivial strongly nonequilibrium nuclear spin population is created. This phenomenon is due to the breaking, via the spin-orbit coupling, of the clock wise - anti clock wise symmetry of the charge carriers momentum, which results in the oscillatory in time persistent current.Comment: 14 pages, Late

Cocaine abuse that presents with acute scrotal pain and mimics testicular torsion

Report case (s) relevant aspects: Man, 27 years old, complaining of acute testicular pain by 2 hours in the remaining left testicle. Denies fever, lower urinary tract symptoms such as dysuria, urinary frequency, concommitant or prior urethral discharge to the painful condition. He underwent right orchiectomy 13 years ago by testicular torsion. He is a chronic user of cocaine for 15 years and during the last three days the drug use was continuous and intense. Proposed premise substantiating case (s) description: Initial diagnostic hypothesis: Syndromic: Acute Scrotum Syndrome (SEA) Main Etiologic (testicular torsion) Secondary Etiologic (acute orchiepididymitis) Briefly delineates what might it add? Lines of research That Could be Addressed: In this challenging clinical case we presented an alternative and new etiologic diangosis for the acute scrotum which the main etiologic factor remains testicular torsion. This new diangosis is acute testicular ischemia as a complication of cocaine abuse4251028103

On the prevention of gastrointestinal bleeding in burned patients treated with omeprazole

Background: The incidence of gastrointestinal bleeding in patients with severe burns can reach up to 10%.Objective: Evaluation of the risk factors for gastrointestinal bleeding and of the effectiveness of stress ulcer prophylaxis in patients with severe burns receiving proton pump inhibitors.Material and methods: The study included the results of treatment of 270 patients with burns more than 10% of total body surface area (TBSA), in whom 13 potential risk factors for gastrointestinal bleeding were studied. All patients received omeprazole therapy with 40 mg № 1 intravenous or 20 mg № 2 orally. The data obtained were processed in Microsoft Office Excel 2007 and IBM SPSS 20.0.Results: Significant risk factors for gastrointestinal bleeding were hypotension requiring treatment with vasopressors (dopamine ≥ 10 μg/kg/min or norepinephrine ≥ 0.5 μg/kg/min) for 2 or more days (χ2 = 5.126; p = 0.024) and full thickness burns with more than 50% of total body surface area (χ2 = 7.031; p = 0.008). The incidence of gastrointestinal bleeding was 4%. These bleedings were hemodynamically insignificant; in all cases, acute ulcers were the cause for them. There were no recurrences of bleeding and no repeated endoscopy or surgical treatment was required. The developed bleeding did not have a significant effect on mortality.Conclusion: Using proton pump inhibitors minimizes the frequency and intensity of gastrointestinal bleeding and also prevents lifethreatening complications during their development. More complex prevention of stress ulceration is necessary for patients with full thickness burns more than 50% of TBSA which develop hypotension requiring long‑term vasopressor therapy

Spin splitting and precession in quantum dots with spin-orbit coupling: the role of spatial deformation

Extending a previous work on spin precession in GaAs/AlGaAs quantum dots with spin-orbit coupling, we study the role of deformation in the external confinement. Small elliptical deformations are enough to alter the precessional characteristics at low magnetic fields. We obtain approximate expressions for the modified $g$ factor including weak Rashba and Dresselhaus spin-orbit terms. For more intense couplings numerical calculations are performed. We also study the influence of the magnetic field orientation on the spin splitting and the related anisotropy of the $g$ factor. Using realistic spin-orbit strengths our model calculations can reproduce the experimental spin-splittings reported by Hanson et al. (cond-mat/0303139) for a one-electron dot. For dots containing more electrons, Coulomb interaction effects are estimated within the local-spin-density approximation, showing that many features of the non-iteracting system are qualitatively preserved.Comment: 7 pages, 7 figure

Electronic spin precession in semiconductor quantum dots with spin-orbit coupling

The electronic spin precession in semiconductor dots is strongly affected by the spin-orbit coupling. We present a theory of the electronic spin resonance at low magnetic fields that predicts a strong dependence on the dot occupation, the magnetic field and the spin-orbit coupling strength. Coulomb interaction effects are also taken into account in a numerical approach.Comment: 5 pages, 4 figure

ФАКТОРЫ РИСКА ЭРОЗИВНО-ЯЗВЕННОГО ПОРАЖЕНИЯ ЖЕЛУДКА И ДВЕНАДЦАТИПЕРСТНОЙ КИШКИ У ПОСТРАДАВШИХ С ТЯЖЕЛОЙ ТЕРМИЧЕСКОЙ ТРАВМОЙ

The value of changes in the acidogenic function of stomach as well as blood circulation disorders in the genesis of erosive ulcer lesions of gastrointestinal tract were evaluated in those suffering from severe thermal injury. The changes in the rates reflecting the blood circulation state (stroke volume, cardiac index, global end-diastolic volume, index of general peripheral vascular resistance) were monitored during the early period of the burn injury. The acidogenic function was tested with the help of endoscopic pH-metry in 24 ± 4 hours and on the 7th and 14th days from the moment of burn injury. It was found out that erosion and acute ulcers complicated by hemorrhage occurred in 12% of those suffering from severe thermal injury in the acute period of the burn disease. And all of them manifested severe blood circulation disorders during the burn shock period despite the anti-shock therapy. At the same stage of treatment hyperacidity occurred in not more than 7-14% of those severely burned, and the major part of patients manifested hypoacidity and unacidity. Changes association evaluation proved that in case of ischemia the protection factors of mucous coat were expressly inhibited and the minimum quantity of chlorohydric acid was enough to damage the mucous coat. The obtained results allowed justifying the pathogenic approach to prevention of erosive ulcer lesion of the mucous coat of the gastrointestinal tract in the patients with burn shock, which is to include first of all the adequate management of the shock, fastest restoration of microcirculation and effective anti-secretion therapy providing unacidity state. У пациентов с тяжелой термической травмой проведена оценка значимости изменений кислотопродуцирующей функции желудка, а также нарушений кровообращения в генезе эрозивно-язвенного поражения желудочно-кишечного тракта. Показатели, отражающие состояние кровообращения (ударный объем, сердечный индекс, глобальный конечно-диастолический объем крови, индекс общего периферического сосудистого сопротивления), мониторировали в динамике на протяжении всего раннего периода ожоговой болезни. Кислотообразующую функцию исследовали через 24 ± 4 ч, а также на 7-е и 14-е сут от момента получения ожоговой травмы с помощью метода эндоскопической рН-метрии. Установлено, что эрозии и острые язвы, осложненные кровотечением, возникали у 12% пострадавших с тяжелой термической травмой в остром периоде ожоговой болезни. При этом у всех в периоде ожогового шока имелись значимые нарушения кровообращения, несмотря на проводимую противошоковую терапию. Гиперацидность же на этом этапе лечения встречалась не более чем у 7–14% тяжелообожженных, а большая часть пострадавших находились в гипо- или анацидном состоянии. Оценка сопряженности изменений показала, что на фоне ишемии происходило выраженное угнетение факторов защиты слизистой оболочки и для ее повреждения хватало минимального количества соляной кислоты. Полученные результаты позволили обосновать патогенетический подход к профилактике эрозивно-язвенного повреждения слизистой оболочки желудочно-кишечного тракта у пациентов с ожоговым шоком, который должен заключаться прежде всего в адекватном лечении шока, быстрейшем восстановлении микроциркуляции и эффективной антисекретерной терапии, обеспечивающей состояние анацидности.