scholarly journals Relação de ensino e aprendizagem a partir de diagnósticos e condutas clínicas de radiografias interproximais

2021 ◽  
Vol 35 (2) ◽  
pp. 29-33
Author(s):  
Aluí Oliveira Barbisan ◽  
Adriana Zanon Moschen ◽  
Adriane Mazzotti Renosto ◽  
Ana Lúcia Pinheiro ◽  
Ana Paula Weissheimer ◽  
...  
Keyword(s):  
X Rays ◽  
Clinical Procedure ◽  
Level Of Education ◽  
Clinical Procedures

The aim of the present paper is to prove the difficult of diagnosis and the variations in clinical procedure from Bite Wing x-rays as well as to analyze the relation teaching - leaving based on such x-rays. To reach the objective of the research we counted on the participation os students from the 6th and 8th semesters of F.O. UFRGS who made the diagnosis and conducted the clinical procedures based on the 4 Bite Wing x-rays. These had been previosly analysed by the professors of the course on Radiology, the results of which were taken as a pattern. The research sought to identify the existance of homogeneity or the lack of it, in the formulation of diagnosis and of clinical procedures, using as criteria the variables of sex and level of education.

Effect of Correctly Using Alcohol-Based Hand Rub in a Clinical Setting

2008 ◽  
Vol 29 (10) ◽  
pp. 954-956 ◽  
Author(s):  
Sussie Laustsen ◽  
Elisabeth Lund ◽  
Bo Martin Bibby ◽  
Brian Kristensen ◽  
Ane Marie Thulstrup ◽  
...  
Keyword(s):  
Clinical Practice ◽  
Clinical Setting ◽  
Hospital Staff ◽  
University Hospital ◽  
Clinical Procedure ◽  
Bacterial Counts ◽  
Clinical Procedures ◽  
Hand Antisepsis

We evaluated hand antisepsis in clinical practice at Aarhus University Hospital in Skejby, Denmark. The rate of compliance with the correct use of alcohol-based hand rub exceeded 55% of all routine clinical procedures observed. With the correct use of alcohol-based hand rub by hospital staff, bacterial counts were reduced by 90% before and 82% after a clinical procedure; with incorrect use, the bacterial counts were reduced by 60% before and 54% after a clinical procedure.

Comparison of Pure-Tone Audibility Thresholds Obtained with Audiological and Two-Interval Forced-Choice Procedures

1986 ◽  
Vol 29 (1) ◽  
pp. 82-91 ◽  
Author(s):  
Lynne Marshall ◽  
Walt Jesteadt
Keyword(s):  
Response Bias ◽  
Pure Tone ◽  
Sound Pressure ◽  
Forced Choice ◽  
Adaptive Procedure ◽  
Clinical Procedure ◽  
Clinical Procedures ◽  
Choice Procedures ◽  
Adaptive Thresholds ◽  
The Difference

Audibility thresholds were measured at 500 and 4000 Hz with a standard clinical procedure and a two-interval, forced-choice (2IFC) adaptive procedure for 72 normal-hearing and hearing-impaired listeners, age 17 to 83. Psychometric functions were obtained for clinical, 2IFC, and Yes-No procedures. A measure of response bias was obtained from the Yes-No procedure. The 2IFC adaptive thresholds were 6.5 dB lower than audiological thresholds. The psychometric functions for the forced?choice procedures were generally shallower than those for the clinical procedure and were shifted to lower sound pressure levels. Response bias played a small role at best in accounting for the magnitude of the difference in threshold estimated by the adaptive and clinical procedures or for the differences among the psychometric functions.

scholarly journals Book Review: From Anesthesia to X-Rays: Innovations and Discoveries That Changed Medicine Forever

2018 ◽  
Vol 58 (1) ◽  
pp. 61
Author(s):  
Bernadette A. Lear
Keyword(s):  
Medical Community ◽  
X Rays ◽  
Therapeutic Practice ◽  
Clinical Procedures ◽  
Starting Point ◽  
Polio Vaccination ◽  
Practice Of Medicine ◽  
Depth Study ◽  
Birth Control Pills

For those who have an interest in the history and current practice of medicine, Christiane Fabbri’s From Anesthesia to X-Rays provides a helpful starting point in terms of choosing topics for more in-depth study. Prioritizing selectivity over comprehensiveness, this small encyclopedia includes fifty clinical procedures, tests, medications, and other innovations that changed therapeutic practice. Some, including birth control pills and polio vaccination, may already be familiar to the general public. Others, such as cataract surgery and pacemakers, are not as frequently mentioned in popular media, but are definitely worth knowing about. The author’s consultations with the medical community and with Nobel Prize lists ensured that only the most important, widely-applicable, and time-tested breakthroughs are highlighted.

scholarly journals Using participatory drama workshops to explore children’s beliefs, understandings and experiences of coming to hospital for clinical procedures

2019 ◽  
pp. 136749351988308
Author(s):  
Lucy Bray ◽  
Ed Horowicz ◽  
Kimberley Preston ◽  
Bernie Carter
Keyword(s):  
Qualitative Study ◽  
Empirical Evidence ◽  
Health Professionals ◽  
Blood Test ◽  
Active Role ◽  
Positive Experience ◽  
Clinical Procedure ◽  
Clinical Procedures ◽  
Making Choices ◽  
Children's Beliefs

Children attending hospital for a clinical procedure such as a scan or blood test can experience anxiety and uncertainty. Children who are informed and supported before and during procedures tend to have a more positive experience. Despite this, there is a lack of empirical evidence directly from children around how they would like to be supported before, during and after a procedure. This qualitative study used improvised drama workshops to investigate children’s ( n = 15, aged 7–14 years) perceptions and opinions of attending hospital for a procedure and what would help them have a positive encounter. Children portrayed themselves as having a small presence during a hospital procedure, depicted by the two themes of ‘having to be brave but feeling scared inside’ and ‘wanting to get involved but being too afraid to ask’. Within both themes, children described how the directive and reassuring language and actions used by health professionals and parents marginalized their contributions. This study shows that children attending hospital for procedures value the opportunity to have a presence and active role, to express their emotions, join in interactions and be involved in making choices about their care.

White-Light Coronal Structures: Streamers and CMEs

1994 ◽  
Vol 144 ◽  
pp. 82
Author(s):  
E. Hildner
Keyword(s):  
Emission Line ◽  
Electron Density ◽  
White Light ◽  
Coronal Mass Ejections ◽  
X Rays ◽  
Solar Cycles ◽  
Temperature Function ◽  
X Ray ◽  
Eclipse Observations ◽  
Coronal Structures

AbstractOver the last twenty years, orbiting coronagraphs have vastly increased the amount of observational material for the whitelight corona. Spanning almost two solar cycles, and augmented by ground-based K-coronameter, emission-line, and eclipse observations, these data allow us to assess,inter alia: the typical and atypical behavior of the corona; how the corona evolves on time scales from minutes to a decade; and (in some respects) the relation between photospheric, coronal, and interplanetary features. This talk will review recent results on these three topics. A remark or two will attempt to relate the whitelight corona between 1.5 and 6 R⊙to the corona seen at lower altitudes in soft X-rays (e.g., with Yohkoh). The whitelight emission depends only on integrated electron density independent of temperature, whereas the soft X-ray emission depends upon the integral of electron density squared times a temperature function. The properties of coronal mass ejections (CMEs) will be reviewed briefly and their relationships to other solar and interplanetary phenomena will be noted.

Emergence of Twisted Magnetic Flux Related Sigmoidal Brightening

2000 ◽  
Vol 179 ◽  
pp. 263-264
Author(s):  
K. Sundara Raman ◽  
K. B. Ramesh ◽  
R. Selvendran ◽  
P. S. M. Aleem ◽  
K. M. Hiremath
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Magnetic Flux ◽  
Ultra Violet ◽  
Active Regions ◽  
Morphological Properties ◽  
Energy Storage And Conversion ◽  
The Sun ◽  
X Rays ◽  
The Magnetic Field

Extended AbstractWe have examined the morphological properties of a sigmoid associated with an SXR (soft X-ray) flare. The sigmoid is cospatial with the EUV (extreme ultra violet) images and in the optical part lies along an S-shaped Hαfilament. The photoheliogram shows flux emergence within an existingδtype sunspot which has caused the rotation of the umbrae giving rise to the sigmoidal brightening.It is now widely accepted that flares derive their energy from the magnetic fields of the active regions and coronal levels are considered to be the flare sites. But still a satisfactory understanding of the flare processes has not been achieved because of the difficulties encountered to predict and estimate the probability of flare eruptions. The convection flows and vortices below the photosphere transport and concentrate magnetic field, which subsequently appear as active regions in the photosphere (Rust & Kumar 1994 and the references therein). Successive emergence of magnetic flux, twist the field, creating flare productive magnetic shear and has been studied by many authors (Sundara Ramanet al.1998 and the references therein). Hence, it is considered that the flare is powered by the energy stored in the twisted magnetic flux tubes (Kurokawa 1996 and the references therein). Rust & Kumar (1996) named the S-shaped bright coronal loops that appear in soft X-rays as ‘Sigmoids’ and concluded that this S-shaped distortion is due to the twist developed in the magnetic field lines. These transient sigmoidal features tell a great deal about unstable coronal magnetic fields, as these regions are more likely to be eruptive (Canfieldet al.1999). As the magnetic fields of the active regions are deep rooted in the Sun, the twist developed in the subphotospheric flux tube penetrates the photosphere and extends in to the corona. Thus, it is essentially favourable for the subphotospheric twist to unwind the twist and transmit it through the photosphere to the corona. Therefore, it becomes essential to make complete observational descriptions of a flare from the magnetic field changes that are taking place in different atmospheric levels of the Sun, to pin down the energy storage and conversion process that trigger the flare phenomena.

The Clinical, Roentgenological and Morphological Effects of an Acute Exposure of Phosgene on the Lungs of Dogs

1971 ◽  
Vol 29 ◽  
pp. 236-237
Author(s):  
R. F. Bils ◽  
W. F. Diller ◽  
F. Huth
Keyword(s):  
Latent Period ◽  
Chemical Industry ◽  
Toxic Substance ◽  
Lung Edema ◽  
X Rays ◽  
Beagle Dogs ◽  
Male And Female ◽  
Morphological Alterations ◽  
Before And After ◽  
Electron Microscopes

Phosgene still plays an important role as a toxic substance in the chemical industry. Thiess (1968) recently reported observations on numerous cases of phosgene poisoning. A serious difficulty in the clinical handling of phosgene poisoning cases is a relatively long latent period, up to 12 hours, with no obvious signs of severity. At about 12 hours heavy lung edema appears suddenly, however changes can be seen in routine X-rays taken after only a few hours' exposure (Diller et al., 1969). This study was undertaken to correlate these early changes seen by the roengenologist with morphological alterations in the lungs seen in the'light and electron microscopes.Forty-two adult male and female Beagle dogs were selected for these exposure experiments. Treated animals were exposed to 94.5-107-5 ppm phosgene for 10 min. in a 15 m3 chamber. Roentgenograms were made of the thorax of each animal before and after exposure, up to 24 hrs.

Chemical Species Identification in an SEM by Changes in Emitted X-Ray Energies

1974 ◽  
Vol 32 ◽  
pp. 570-571
Author(s):  
R. H. Duff
Keyword(s):  
Species Identification ◽  
Valence Electron ◽  
Chemical Species ◽  
X Rays ◽  
Chemical Bonds ◽  
Small Shift ◽  
X Ray ◽  
Electron Transitions ◽  
Peak Energy ◽  
Chemical Combination

A material irradiated with electrons emits x-rays having energies characteristic of the elements present. Chemical combination between elements results in a small shift of the peak energies of these characteristic x-rays because chemical bonds between different elements have different energies. The energy differences of the characteristic x-rays resulting from valence electron transitions can be used to identify the chemical species present and to obtain information about the chemical bond itself. Although these peak-energy shifts have been well known for a number of years, their use for chemical-species identification in small volumes of material was not realized until the development of the electron microprobe.

Influence of X-Ray Induced Fluorescence on Energy Dispersive X-Ray Analysis of Thin Foils

1977 ◽  
Vol 35 ◽  
pp. 328-329
Author(s):  
E. A. Kenik ◽  
J. Bentley
Keyword(s):  
Thin Foil ◽  
Electron Excitation ◽  
Simple Approach ◽  
Foil Thickness ◽  
X Rays ◽  
X Ray ◽  
Hole Spectrum ◽  
Illumination System ◽  
Thin Foils ◽  
Intensity Ratios

Cliff and Lorimer (1) have proposed a simple approach to thin foil x-ray analy sis based on the ratio of x-ray peak intensities. However, there are several experimental pitfalls which must be recognized in obtaining the desired x-ray intensities. Undesirable x-ray induced fluorescence of the specimen can result from various mechanisms and leads to x-ray intensities not characteristic of electron excitation and further results in incorrect intensity ratios.In measuring the x-ray intensity ratio for NiAl as a function of foil thickness, Zaluzec and Fraser (2) found the ratio was not constant for thicknesses where absorption could be neglected. They demonstrated that this effect originated from x-ray induced fluorescence by blocking the beam with lead foil. The primary x-rays arise in the illumination system and result in varying intensity ratios and a finite x-ray spectrum even when the specimen is not intercepting the electron beam, an ‘in-hole’ spectrum. We have developed a second technique for detecting x-ray induced fluorescence based on the magnitude of the ‘in-hole’ spectrum with different filament emission currents and condenser apertures.

Structural preservation and absolute contrast of catalase crystal sections prepared with tannic acid

1983 ◽  
Vol 41 ◽  
pp. 448-449
Author(s):  
C.W. Akey ◽  
M. Szalay ◽  
S.J. Edelstein
Keyword(s):  
Tannic Acid ◽  
Beef Heart ◽  
X Rays ◽  
Screw Axis ◽  
General Applicability ◽  
Thin Sections ◽  
Beef Liver ◽  
3 Dimensional ◽  
Dimensional Reconstruction ◽  
Structural Preservation

Three methods of obtaining 20 Å resolution in sectioned protein crystals have recently been described. They include tannic acid fixation, low temperature embedding and grid sectioning. To be useful for 3-dimensional reconstruction thin sections must possess suitable resolution, structural fidelity and a known contrast. Tannic acid fixation appears to satisfy the above criteria based on studies of crystals of Pseudomonas cytochrome oxidase, orthorhombic beef liver catalase and beef heart F1-ATPase. In order to develop methods with general applicability, we have concentrated our efforts on a trigonal modification of catalase which routinely demonstrated a resolution of 40 Å. The catalase system is particularly useful since a comparison with the structure recently solved with x-rays will permit evaluation of the accuracy of 3-D reconstructions of sectioned crystals.Initially, we re-evaluated the packing of trigonal catalase crystals studied by Longley. Images of the (001) plane are of particular interest since they give a projection down the 31-screw axis in space group P3121. Images obtained by the method of Longley or by tannic acid fixation are negatively contrasted since control experiments with orthorhombic catalase plates yield negatively stained specimens with conditions used for the larger trigonal crystals.

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