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51.
52.
STATEMENT OF PROBLEM: The identification of dental implant bodies in patients without available records is a considerable problem due to increased patient mobility and to the large number of implant systems with different designs. PURPOSE: The purpose of this study was to document features that would help dentists identify non-threaded implant bodies from their radiographic images. MATERIAL AND METHODS: More than 50 implant manufacturers were contacted and asked to provide implants with dimensions as close as possible to 3.75 mm (diameter) x 10 mm (length). Forty-four implants were donated, 16 of which were identified as non-threaded. Radiographs were made of these implants at 0 degrees, 30 degrees, 60 degrees, and 90 degrees horizontal rotation combined with -20 degrees, -10 degrees, 0 degrees, +10 degrees, and +20 degrees vertical inclination relative to the radiographic beam and film. A total of 20 images per implant were taken and examined to identify consistent, unique features that would aid in implant identification. At a 20 degrees vertical inclination, vital features of implants were distorted enough to be deemed unrecognizable. Therefore, only those observations made from radiographs between -10 degrees and +10 degrees vertical inclination were used for implant identification purposes. RESULTS: All implants could be recognized from radiographs made between -10 degrees and +10 degrees vertical inclination. A series of tables and flowcharts describe the implants according to their identifying features. CONCLUSION: Information from this study should help dentists identify non-threaded endosseous implants from their radiographic images. 相似文献
53.
DJ Hillis BL Crowe IG McDonald WJ Kelly RD Truran DM Hailey 《Journal of Medical Imaging and Radiation Oncology》1996,40(3):291-296
The first computed radiography (CR) unit in Australia was installed at St Vincent's Hospital, Melbourne, in February 1994. An initial qualitative evaluation of the attitude of the intensive care unit (ICU) physicians to the CR unit was conducted in June 1994 by use of a survey. The results of the survey of ICU physicians indicated that images were available faster than under the previous system and that the use of the CR system was preferred to evaluate chest tubes and line placements. While it is recognized that a further detailed radiological evaluation of the CR system is required to establish the diagnostic performance of CR compared with conventional film, some comments on the implementation of the system and ICU physician attitudes to the CR system are put forward for consideration by other hospitals examining the possible use of CR systems. 相似文献
54.
We assessed the clinical progress of 55 children 2 years after admission to hospital with acute bronchiolitis and performed lung function tests on 40. During the 2 year follow up period 75% of the children had wheezed, 36% had 2 or more lower respiratory symptoms lasting more than 2 weeks, 33% had more than 100 days of lower respiratory symptoms, and 13% were readmitted to hospital with acute respiratory disease. In addition 60% of the children were hyperinflated on lung function tests. Many of the children with hyperinflation at the 2 year assessment had not been hyperinflated 1 year earlier, suggesting variable airways obstruction. Reversibility of airways obstruction was also assessed by response to nebulised salbutamol. Nine children had a fall greater than 15% in airways resistance after salbutamol and these children had the highest baseline airways resistances. Airways resistance was higher in the children with a family history of atopy. 相似文献
55.
L Di Alberti SR Porter PM Speight CM Scully JM Zakrzewska IG Williams L Artese A Piattelli SL Ngui CG Teo 《Oral diseases》1997,3(Z1):S133-S134
OBJECTIVE: To determine the frequency of detection of human herpesvirus-8 (HHV-8) in HIV-related oral ulcers. DESIGN: Analysis of archived biopsy material. METHODS: Nested polymerase chain reaction of DNA extracts. RESULTS: HHV-8 DNA was detected in six of 10 oral ulcers of HIV-positive patients without oral Kaposi's sarcoma (KS) lesions and five of 11 oral KS lesions. The positive non-KS samples were derived from various oral sites. CONCLUSIONS: In HIV-positive people, HHV-8 can infect oral tissues that are not affected by KS. 相似文献
56.
Background
An upper limb arteriovenous (AV) fistula is the access of choice for haemodialysis (HD). There have been few reports of saphenofemoral AV fistulas (SFAVF) over the last 10-20 years because of previous suggestions of poor patencies and needling difficulties. Here, we describe our clinical experience with SFAVF.Methods
SFAVFs were evaluated using the following variables: immediate results, early and late complications, intraoperative and postoperative complications (up to day 30), efficiency of the fistula after the onset of needling and complications associated to its use.Results
Fifty-six SFAVF fistulas were created in 48 patients. Eight patients had two fistulas: 8 patent (16%), 10 transplanted (20%), 12 deaths (24%), 1 low flow (2%) and 20 thrombosis (39%) (first two months of preparation). One patient had severe hypotension during surgery, which caused thrombosis of the fistula, which was successfully thrombectomised, four thrombosed fistulae were successfully thrombectomised and revised on the first postoperative day. After 59 months of follow-up, primary patency was 44%.Conclusion
SFAVF is an adequate alternative for patients without the possibility for other access in the upper limbs, allowing efficient dialysis with good long-term patency with a low complication rate. 相似文献57.
58.
The objective of this clinical study was to determine the real frequency
and clinical importance of partial obstruction of the seminal path in
patients with oligozoospermia. We have designed a prospective clinical
study including men with oligozoospermia seen at an andrological
consultation in both private and institutional hospitals. A testicular
biopsy was done on all patients under local anaesthesia. A complete study
for sterility was also done [hormonal determinations: follicle-stimulating
hormone (FSH), luteinizing hormone (LH), testosterone, testicular
ultrasound, semen analysis, testicular Doppler ultrasound, etc.]. We have
made a quantitative and qualitative evaluation of testicular biopsy
(percentage of tubules with Sertoli cell only or with hyalinization; mean
tubular diameter; number of spermatogonia, primary spermatocytes, young
spermatids, mature spermatids and Sertoli cells; and evaluation of
testicular interstitium: number of Leydig cell clusters, presence of
angiectasis, presence of perivascular inflammation). Sixty one per cent of
all oligozoospermia cases were obstructive. The principal cause of
obstructive oligozoospermia was the presence of testicular varicocele. In
obstructive oligozoospermia, the tubular diameter and number of mature
spermatids are statistically significantly higher than in non- obstructive
oligozoospermia. Obstructive oligozoospermia is a frequent condition caused
by partial obstruction of seminal path. A quantitative analysis of the
testicular biopsy is the only method of diagnosis.
相似文献
59.
IG Roberts 《Archives of disease in childhood》1993,68(2):190-192
Trends in pedestrian injury mortality for children aged 0-4 and 5-14 for England and Wales, Denmark, Sweden, the USA, and New Zealand were examined from 1968 onwards. While there has been a reduction in the pedestrian mortality in all these countries, there are striking international differences in the extent of these reductions. Denmark has achieved the greatest fall in mortality with the smallest decrease seen in New Zealand. Countries which have experienced major decreases in pedestrian mortality are distinguished by having placed greater emphasis on environmentally based prevention strategies rather than pedestrian skills education. 相似文献
60.
PY Basak† AK Adiloglu‡ IG Koc† T Tas‡ VB Akkaya† 《Journal of the European Academy of Dermatology and Venereology》2008,22(8):970-976
Background Recent observations established the role of altered cellular immunity and autoimmune hypothesis in the pathogenesis of vitiligo. There have been several reports discussing T‐cell and natural killer (NK) cell populations, but NK cell receptors were not evaluated in vitiligo. Objective The purpose of this investigation was to assess the role of T and NK cells as well as activatory and inhibitory NK cell receptor alterations in the pathogenesis of vitiligo and whether any aberrations were correlated with clinical findings of the disease. Patients/methods Fifty‐three patients with non‐segmental vitiligo and 45 age‐ and sex‐matched healthy controls were enrolled in the study. The percentages of lymphocytes, granulocytes, monocytes and CD3, CD4, CD8, CD14, CD16, CD56, CD45, CD45RA, CD54RO, CD28, CD80, CD94, CD158a, KIR3DL‐1 receptors as well as CD94, CD158a, KIR3DL‐1 receptors on CD16+ cells were detected by using flow cytometry. The patient and control groups were compared in terms of the results of flow cytometric analysis, and the results were assessed regarding the type and activity of vitiligo. Results The percentages of CD16+CD56+, CD3+CD16+CD56+, CD8+ and CD45RO+ cells were significantly increased in vitiligo group compared with the controls. No difference was detected between the patients and control groups in percentages of CD3+, CD4+, CD3?CD16+CD56+, CD28+, CD45+, CD45RA+, CD94+, CD158a+ and KIR3DL‐1+ cells. The percentage of CD16+CD158a+ cells was significantly decreased in a randomized selected group of vitiligo patients. There were no differences in percentage expression of studied cell surface antigens between patients in the active or stable period. CD3+ cells were significantly increased in generalized form, and CD45RO+ cells were significantly increased in acral/acrofacial form when compared with the other types of vitiligo. Conclusions These results indicate further evidence for T and NK cell abnormalities in non‐segmental vitiligo. The present data show that NK cell activation may be responsible in the pathogenesis of vitiligo in conformity with decreased inhibitory and increased activatory NK cell receptors. 相似文献