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Second Examination (second + examination)
Selected AbstractsDoes diagnostic sonography alter thyroid and parathyroid hormone levels?JOURNAL OF CLINICAL ULTRASOUND, Issue 1 2008Erdinc Serin MD Abstract Purpose To investigate possible alterations in the levels of thyroid and parathyroid hormones (PTHs) and thyroglobulin (TG) in healthy individuals following diagnostic sonographic examination of the thyroid gland. Methods Thirty healthy women with no pathologic findings underwent sonographic examination, followed 6 weeks later by a second examination involving a probe-only application (PA) with the ultrasound scanner switched off. Duration times were identical for both examinations. Blood was drawn before and after the 2 applications. Thyroid hormone, PTH, and TG levels before and after the 2 applications were compared, and the difference between the variations for each parameter in the first and second applications was assessed. Blood samples were taken before and after the sonographic examination and the PA, and the serum concentrations of sensitive thyrotropin, total and free thyroxine, total and free tri-iodothyronine, TG, and PTH were measured. The pre- and post-examination levels of the hormones for the 2 applications were then compared and the difference between the variations for each parameter in the first and second application was then assessed. Results The only significant variations observed were in the TG levels after PA and PTH levels after both sonographic examination and PA. The comparison between the 2 difference values revealed no significant difference except for PTH. Conclusion This preliminary report on the possible influence of sonographic examination of the thyroid on the serum levels of thyroid and parathyroid hormones suggests that gland secretions such as PTH may be affected by external factors, including ultrasound. Clinicians should be aware of alterations in hormone levels by external factors. © 2007 Wiley Periodicals, Inc. J Clin Ultrasound, 2008 [source] Asbestos-related disease among sheet metal workers 1986,2004: Radiographic changes over time,,AMERICAN JOURNAL OF INDUSTRIAL MEDICINE, Issue 7 2009FACOEM, Laura S. Welch MD Abstract Background In 1985, the Sheet Metal Workers International Association and the Sheet Metal and Air Conditioning National Association formed The Sheet Metal Occupational Health Institute Trust (SMOHIT) to examine the health hazards of the sheet metal industry. Between 1986 and 2004 18,211 individuals were examined. At the time of the first examination 9.6% of all participants (1,745) had findings consistent with parenchymal disease (ILO,>,1/0), and 21% (3,827) had pleural scarring. Methods 2181-Two thousand hundred eighty-one who had no radiographic evidence of pneumoconiosis on baseline examination underwent a second examination. Results By the second examination, 5.3% had developed parenchymal disease on chest radiograph; an additional 12.4% had developed pleural scarring without parenchymal disease. Factors that predicted new cases of pneumoconiosis on radiograph were the calendar year the worker entered the sheet metal trade, smoking, and shipyard work. Forty-seven percent of those smoking at the time of initial exam reported having quit smoking by the second examination. Conclusions Asbestosis is still occurring 50 years after first exposure. Exposed workers benefit from medical screening programs that incorporate smoking cessation. Am. J. Ind. Med. 52:519,525, 2009. © 2009 Wiley-Liss, Inc. [source] Vigabatrin: longterm follow-up of electrophysiology and visual field examinationsACTA OPHTHALMOLOGICA, Issue 5 2003Peter Hardus Abstract. Background:,To report the results of repeated electrophysiological and visual field examinations in patients with vigabatrin-associated visual field loss (VGB-VFL) and the relationship between these electrophysiological findings, the cumulative dose of vigabatrin and the extent of visual field loss. Methods:,Twenty-two eyes of 11 patients with VGB-VFL were studied. All patients underwent surgery for therapy-resistant epilepsy. Repeated electro-oculograms (EOGs) and flash electroretinograms (ERGs) were made and the cumulative dose of vigabatrin and the visual field loss were recorded after a period of 37,47 months. Results:,The visual field loss was stable in patients who had stopped vigabatrin at the time of the first examination. There was a slight increase in VFL in patients who continued vigabatrin. During the second EOG and ERG, abnormalities in scotopic and photopic a-wave latencies and in scotopic b-wave amplitude were found in more than 50% of patients. Only b-wave latency became normal, while EOG, a-wave latency, a-wave amplitude and b-wave amplitude stayed abnormal. The amount of VFL and the cumulative dose of vigabatrin were statistically correlated with the b-wave amplitude, mainly photopic, found during the first and second examinations. Conclusion:,After 4 years, EOG, flash ERG and visual field loss had not improved in patients with VGB-VFL. The statistically significant correlation found during the first examination between the amount of VFL and the cumulative dose of vigabatrin with the (mainly photopic) b-wave amplitude remained constant. [source] Osseointegration of titanium alloy and HA-coated implants in healthy and ovariectomized animals: a histomorphometric studyCLINICAL ORAL IMPLANTS RESEARCH, Issue 11 2009Guaracilei Maciel Vidigal Jr Abstract Objectives: The objective of the present study is to evaluate the response to dental implants in healthy and osteoporotic bone. Materials and methods: Ten ovariectomized (OVX) New Zealand rabbits submitted to a hypocalcic diet and 10 sham-aged rabbits were used. All animals were submitted to bone mineral density (BMD) measurements before ovariectomy, and also 4 months afterwards, using dual energy X-ray absorptiometry. The BMD measurements showed a significant loss of bone mass, between the first and second examinations, only in the experimental group (P<0.05). After the bone mass loss induction period, three different implants were installed in the proximal tibia metaphisis of each animal: a titanium alloy implant (Ti), a plasma-spray hydroxyapatite-coated implant (HA-PS), and another implant coated with hydroxyapatite with the biomimetic process (HA-B). Results: After 3 months, histomorphometry showed a bone-to-implant contact (BIC) for Ti implants of 73.09±13.74% in healthy and 66.09±30.01% in OVX animals. The BIC for the HA-PS was 64.83±15.65% and 90.17±8.14% for healthy and OVX animals, respectively, and 88.66±5.30% and 87.96±10.71% for the HA-B implants placed in the same conditions. The differences between the implants in healthy and OVX conditions were not statistically significant (P>0.05). The only significant difference within groups was observed in the healthy animals between HA-B and Ti implants (P<0.06). Conclusion: Within the parameters used in this animal model it was not possible to observe BIC differences between osteoporotic and healthy animals. [source] | ||||||||||