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González Del Valle F - One of the best experts on this subject based on the ideXlab platform.

  • EXPLORATION OF THE ANTERIOR SEGMENT BY OPTICAL COHERENCE TOMOGRAPHY-3 EXPLORACIÓN DEL SEGMENTO ANTERIOR MEDIANTE TOMOGRAFÍA ÓPTICA DE COHERENCIA 3
    2006
    Co-Authors: Núñez A, López-romero S, López-mondéjar E, González Del Valle F
    Abstract:

    Purpose: To show the utility of optical coherence tomography (OCT) for studying the anterior segment and to explain its potential advantages as compared to ultrasonic biomicroscopy (UBM). Materials and methods: We have described the findings in 5 patients with different pathologies of the anterior segment, all of whom were studied with UBM and OCT-3 adjusted for the anterior segment. There were 2 cases of an acute attack of closed angle glaucoma, 1 case of rubeosis iridis, 1 case of penetrating ocular trauma and 1 case of a primary stromal iris cyst. Results: OCT was found to be as useful as UBM in detecting angle closure in patients affected by an acute attack of glaucoma. In addition, OCT was more comfortable for the patient and faster than UBM in obtaining images, with the exploration mean time using OCT being less than five minutes while that with UBM was over ten minutes. OCT has also been demonstrated to be a safe and valuable non-Contact Examination in other iris pathologies such as rubeosis iridis, for checking the permeability of iridotomies and even for studying iris masses such as primary stromal iris cysts. In these entities OCT may reach a higher resolution than ultrasonic biomicroscopy.

  • EXPLORACIÓN DEL SEGMENTO ANTERIOR MEDIANTE TOMOGRAFÍA ÓPTICA DE COHERENCIA 3 EXPLORATION OF THE ANTERIOR SEGMENT BY OPTICAL COHERENCE TOMOGRAPHY-3
    2006
    Co-Authors: Núñez A, López-romero S, López-mondéjar E, González Del Valle F
    Abstract:

    Purpose: To show the utility of optical coherence tomography (OCT) for studying the anterior segment and to explain its potential advantages as compared to ultrasonic biomicroscopy (UBM). Materials and methods: We have described the findings in 5 patients with different pathologies of the anterior segment, all of whom were studied with UBM and OCT-3 adjusted for the anterior segment. There were 2 cases of an acute attack of closed angle glaucoma, 1 case of rubeosis iridis, 1 case of penetrating ocular trauma and 1 case of a primary stromal iris cyst. Results: OCT was found to be as useful as UBM in detecting angle closure in patients affected by an acute attack of glaucoma. In addition, OCT was more comfortable for the patient and faster than UBM in obtaining images, with the exploration mean time using OCT being less than five minutes while that with UBM was over ten minutes. OCT has also been demonstrated to be a safe and valuable non-Contact Examination in other iris pathologies such as rubeosis iridis, for checking the permeability of iridotomies and even for studying iris masses such as primary stromal iris cysts. In these entities OCT may reach a higher resolution than ultrasonic biomicroscopy.

T. Jayakumar - One of the best experts on this subject based on the ideXlab platform.

  • detection of leakage magnetic flux from near side and far side defects in carbon steel plates using a giant magneto resistive sensor
    Measurement Science and Technology, 2008
    Co-Authors: Sharatchandra W Singh, S Vaidyanathan, T. Jayakumar
    Abstract:

    Giant magneto-resistive (GMR) sensors are attractive for magnetic flux leakage measurements, especially for the detection of shallow near-side cracks and deeply located defects. An optimized measurement system with magnetic yoke, GMR sensor and selective amplifier has been devised to detect the tangential component of leakage flux from various near-side notches and far-side notches (widths 0.5 mm and 1.0 mm, respectively) in 12 mm thick carbon steel plates. Far-side notches located at nearly 11 mm below the measurement surface have been detected with a good signal-to-noise ratio. The performance of the GMR sensor with lift off has also been studied for possible non-Contact Examination of hot surfaces and a lift off of 2 mm is expected to ensure the saturation-free detection of near-side as well as far-side notches.

Hans L. Rieder - One of the best experts on this subject based on the ideXlab platform.

  • Contacts of tuberculosis patients in high-incidence countries.
    International Journal of Tuberculosis and Lung Disease, 2003
    Co-Authors: Hans L. Rieder
    Abstract:

    The risk of acquiring infection with Mycobacterium tuberculosis correlates with duration of exposure to an infectious source of tuberculosis. Contact identification is therefore a comparatively high-yield activity. However, in resource-poor settings tuberculin is rarely available, and even where it is available, non-specific cross-reactions to tuberculin resulting from BCG vaccination complicate the interpretation of tuberculin test results. The identification of a putative infection with M. tuberculosis in a Contact must result in intervention. Excluding active tuberculosis is mandatory before preventive therapy is provided. This might prove difficult in areas where the most and often only affordable diagnostic means is microscopy. The International Union Against Tuberculosis and Lung Disease (IUATLD) has thus proposed to target preventive therapy to healthy children below the age of 5 years living in the same household as a sputum smear-positive tuberculosis case, with the sole recourse to clinical Contact Examination. While this approach will lead to treatment of a considerable proportion of uninfected children, the advantages are several-fold: first, these are the easiest identifiable Contacts; second, they are particularly prone to progression to disease if infected; third, emerging drug resistance is of little concern at that age; fourth, administration of preventive treatment can be delegated to the source case. This approach is safe, simple, and affordable.

Misao Kawara - One of the best experts on this subject based on the ideXlab platform.

  • Comparison of direct and indirect occlusal Contact Examinations with different clenching intensities
    Journal of oral rehabilitation, 2014
    Co-Authors: Osamu Komiyama, Ryoko Obara, Takashi Iida, Takashi Asano, Manabu Masuda, Takashi Uchida, A. De Laat, Misao Kawara
    Abstract:

    Summary The aims of this study were to examine the change of occlusal Contact area following the increment of clenching intensity using silicone materials and electromyography (EMG) in normal subjects and to compare direct intra-oral Examination with indirect Examination using dental casts mounted by means of two impression methods. Participants were 7 men and 5 women with no more than one missing tooth per quadrant and no pain in the head and neck region. During the task, intercuspal position was maintained with minimal force, 20% maximum voluntary contraction (MVC) and 40% MVC using electromyography visual feedback. Three types of occlusal Contact Examinations were performed with the aid of blue silicone material in randomised order: (i) intra-oral direct occlusal Contact Examination (DE), (ii) indirect occlusal Contact Examination with dental casts using conventional impression method (IEC) and (iii) using occlusal impression method (IEO). Total occlusal Contact area during DE and IEO significantly increased from baseline to 20% MVC and from baseline to 40% MVC, but not during IEC. Total occlusal Contact area during DE in all tooth clenching conditions was significantly larger compared to IEO and IEC (P 

  • influence of the thickness of silicone registration material as a means for occlusal Contact Examination an explorative study with different tooth clenching intensities
    Journal of Oral Rehabilitation, 2013
    Co-Authors: Ryoko Obara, Osamu Komiyama, Takashi Iida, A. De Laat, Misao Kawara
    Abstract:

    Summary This study explored the influence of the thickness of silicone registration material on evaluation of the occlusal Contact area and number of occlusal Contact points, during increasing tooth clenching conditions in normal subjects. Twenty-four subjects with no more than one missing tooth per quadrant participated. Surface electro-myography was recorded from the masseter muscle. As a baseline measurement, intercuspal position was maintained with minimal force, and occlusal Contact was recorded using blue silicone material. Occlusal Contact was also recorded at 20% maximum voluntary contraction (MVC) and 40% MVC using visual feedback. The occlusal Contact area and number of occlusal Contact points were analysed using five levels of thickness of silicone registration material: Level 1 (0–149 μm); Level 2 (0–89 μm); Level 3 (0–49 μm); Level 4 (0–29 μm); and Level 5 (0–4 μm). The anterior part and the left and right posterior regions of the dental arch were analysed separately. At all detection levels, the occlusal Contact area significantly increased from baseline to 20% MVC and to 40% MVC in the molar area (P < 0·05). In the anterior part, the occlusal Contact area significantly increased from baseline to 20% MVC and to 40% MVC only when using Level 5. The number of occlusal Contact points significantly increased from baseline to 20% MVC and to 40% MVC only when using Level 5 in the molar area (P < 0·05). It suggested that occlusal Contacts may be different at low tooth clenching intensity with potential effects on the teeth or periodontal tissues.

  • Influence of the thickness of silicone registration material as a means for occlusal Contact Examination – an explorative study with different tooth clenching intensities
    Journal of oral rehabilitation, 2013
    Co-Authors: Ryoko Obara, Osamu Komiyama, Takashi Iida, A. De Laat, Misao Kawara
    Abstract:

    Summary This study explored the influence of the thickness of silicone registration material on evaluation of the occlusal Contact area and number of occlusal Contact points, during increasing tooth clenching conditions in normal subjects. Twenty-four subjects with no more than one missing tooth per quadrant participated. Surface electro-myography was recorded from the masseter muscle. As a baseline measurement, intercuspal position was maintained with minimal force, and occlusal Contact was recorded using blue silicone material. Occlusal Contact was also recorded at 20% maximum voluntary contraction (MVC) and 40% MVC using visual feedback. The occlusal Contact area and number of occlusal Contact points were analysed using five levels of thickness of silicone registration material: Level 1 (0–149 μm); Level 2 (0–89 μm); Level 3 (0–49 μm); Level 4 (0–29 μm); and Level 5 (0–4 μm). The anterior part and the left and right posterior regions of the dental arch were analysed separately. At all detection levels, the occlusal Contact area significantly increased from baseline to 20% MVC and to 40% MVC in the molar area (P 

Jata - One of the best experts on this subject based on the ideXlab platform.

  • Tuberculosis annual report 2010--(5) Case finding
    Kekkaku : [Tuberculosis], 2012
    Co-Authors: Jata
    Abstract:

    We reviewed the tuberculosis (TB) surveillance database to determine the mode of detection, delays in achieving a TB diagnosis, and patients' occupational status upon registration. Of the 23,261 TB patients who were newly notified in 2010, 81.7% were diagnosed at medical institutions. Of these, 12.0% were diagnosed during hospitalisation with a disease other than TB, and 9.9% were diagnosed during outpatient visits with diseases other than TB. The overall proportion of TB cases detected by Contact Examination was only 2.8%, but this mode of detection was higher (56.1%) among younger TB patients aged 0-14 years. Of the 18,328 pulmonary TB patients, 27.3% had only respiratory symptoms, 31.0% had both respiratory and other symptoms, and 16.4% had only non-respiratory symptoms. Approximately one-quarter of elderly patients aged > or = 80 years with symptomatic pulmonary TB had only non-respiratory symptoms. pulmonary TB tended to have long total delays (the amount of time between the onset of symptoms and diagnosis). Among elderly patients, patient delays tended to be short, whereas doctor delays tended to be long. Of the 2,785 female pulmonary TB patients aged 20-59 years, 14.5% were medical workers and 10.4% of these were nurses.

  • Tuberculosis Annual Report 2009--Series 5. case findings
    Kekkaku : [Tuberculosis], 2011
    Co-Authors: Jata
    Abstract:

    The mode of detection, delays in detection, patient's occupation and so on were examined using the tuberculosis (TB) surveillance data from 2009. Of the 24,170 TB patients newly notified in 2009, 82.1% were detected at medical institutions. Of those, 11.4% were detected during hospitalization with a disease other than TB and 9.2% were detected as outpatients with a disease other than TB. On the other hand, a significant proportion of adolescents and young adults were also detected by active case findings (mass screening+Contact Examination). For example, 23.0% of TB patients aged 15-19 years were detected by periodic school mass screening, and 23.7% of TB patients aged 25-29 years were detected by periodic health Examinations for employees. The proportion of TB patients detected by Contact Examination was only 2.6%; this figure was larger among younger TB patients. For example, 43.9% of those aged 0-14 years were detected by Contact Examinations. In terms of the symptoms of 18,912 pulmonary TB patients, 28.0% had only respiratory symptoms, 30.9% had both respiratory and other symptoms, and 16.1% had only nonrespiratory symptoms. The proportion of TB patients having only non-respiratory symptoms increased among the elderly. More than 20.0% of symptomatic pulmonary TB patients over 75 years had only non-respiratory symptoms. Regarding the delay of case detection among 14,511 symptomatic pulmonary TB patients, the patient's delay was shorter while the doctor's delay longer in the older age group, compared with the younger age group. Generally, sputum smear-positive symptomatic pulmonary TB patients showed longer total delays. The proportion and number of nurses/public health nurses among female patients of 20-59 years were 10.2% and 322, increasing slightly from 9.3% and 300, respectively, in 2008.

  • Tuberculosis annual report 2008--Series 3. Childhood TB
    Kekkaku : [Tuberculosis], 2009
    Co-Authors: Jata
    Abstract:

    The number of newly notified childhood tuberculosis (TB) patients aged 0-14 years fell dramatically from the 1970s, and newly notified childhood TB cases in 2008 was 95, corresponding to 0.55 per 100,000. Among 95 childhood TB patients, 41 (43.2%) were aged 0-4 years, 5 (5.3%) were foreigners and 36 (37.9%) were extra-pulmonary TB. Meningeal TB among those aged 0-14 years has not been notified since 2006. The trends of incidence rates of childhood TB differed by age group. Till the early 1970s, the 5-9 age group showed the highest rate among childhood TB, but then showed the lowest rate from the late 1980s. On the other hand, the 0-4 age group has consistently shown the highest rate since the late 1970s. Concerning the mode of detection in 2008, 43 patients (45.3%) were detected by family Contact Examination and 8 (8.4%) were detected by other Contact Examination. Thirty-five patients (36.8%) were detected at medical institutions with some symptoms, and only 3 (3.2%) patients were detected by mass-screening at school. There are 47 prefectures in Japan, of which 14 had no childhood TB case in 2008. Most childhood TB cases were in Tokyo with 12 patients, followed by Osaka and Kanagawa with 8 patients each.