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The concept of bone conduction hearing is old. By the 16th century the conduction of sound by a rod or the staff of a spear was reported by a number of writers; however, these writers considered these phenomena as a curiosity rather than having practical value. In the 17th century, John Bulwer and George Sibscota, both interested in the deaf and their education, applied the bone conduction phenomenon as an aid to defective hearing. Soon, independent reports from Germany, France, and Italy also described bone conduction rod devices as aids to impaired hearing. In 1879, the Audiphone, a hearing fan that operated by bone conduction, was patented. The invention of the Audiphone triggered the development and sale of a number of similar devices that had considerable popularity until the invention of the carbon-electric hearing aid in the early 1900s. 相似文献
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BACKGROUND: Extracorporeal shock wave lithotripsy is relatively contraindicated in patients with an implanted cardiac pacemaker. Shock waves can damage the pacemaker by mechanical pressure and also by electromagnetic induction. Since the distance between the applicator and the pacemaker is small during biliary lithotripsy, the risk of damaging the pacemaker is greater. In the following case, the patient presented with a stone in the common bile duct, and had an implanted pacemaker. Lithotripsy with non-synchronized shock waves was the method of choice since conventional surgery was high risk in this specific case. CASE REPORT: In an 84-year-old woman with a stone in the proximal part of the common bile duct, endoscopic attempts of extraction failed. Therefore, shock wave lithotripsy was indicated. This patient had serious heart disease with an interference of spontaneous heart action with the pacemaker at a ratio of 1:1. We decided to treat with shock wave lithotripsy. The application of shock waves was without side effects on the patient and the pacemaker. CONCLUSION: This case is interesting as it highlights the possibility of using the Czech made MEDILIT lithotriptor in the treatment of choledocholitiasis in patients with a pacemaker. Even so, it is necessary to monitor the patient's ECG to ensure the possibility of immediate external stimulation. 相似文献
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A 32-year-old female with amenorrhea-galactorrhea due to primary hypothyroidism was treated with thyroid hormones, and serum levels of thyrotropin (TSH), prolactin (PRL), triiodothyronine (T3), thyroxin (T4), and T3 resin sponge uptake (RT3U) were measured throughout the course of treatment. The elevated serum levels of TSH and PRL fell into the normal range following T3 treatment. Subsequently, the menstrual cycle was restored within 1 month, and galactorrhea completely ceased and conception was achieved within 3 months. Desiccated thyroid was administered during pregnancy, and the patient gave birth to a female infant. Impaired secretion of PRL during pregnancy and poor milk secretion with blunted response of PRL to the suckling stimulus during the puerperium were noted. 相似文献
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K Podoll F Bofinger B von der Stein W Stuhlmann C Kretschmar 《Canadian Metallurgical Quarterly》1993,61(2):62-66
A 82-year old woman had, since the age of 50, a history of 9 phases of monopolar endogenous depression with abnormal intestinal sensations and hypochondriac delusions that appeared as delusional parasitosis in 5 of these phases. Differential diagnosis and therapeutic aspects are discussed. 相似文献
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To gain further insights into the immunopharmacological mode of action of the immunosuppressant antibiotic deoxyspergualin (DSP), its effects were evaluated in murine lethal endo- and exotoxemia. These are two cytokine-mediated macrophage and T cell dependent immunoinflammatory conditions that can be induced in D-Galactosamine (D-Gal) presensitized mice by the injections with either LPS or SEB, respectively. The results show that prophylactic treatment with DSP (2.5 or 5 mg/kg bd.wt. 48, 24 and 2 h prior to challenge) neither improved the rate of survival, nor influenced the massive increase in the blood levels of tumor necrosis factor-alpha which followed the challenge with LPS or SEB. In sharp contrast, these clinical and seroimmunological events were both markedly counteracted by prophylactic treatment with sodium fusidate, another immunosuppressive agent used as control. 相似文献
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A Rogli? D Kastelan B Kozi?-Rukavina M Korsi? 《Canadian Metallurgical Quarterly》1998,120(7-8):210-212
A 45-year old woman with the typical Turner's phenotype (short stature, short and broad neck, shield chest and low hairline) and signs of ovarian failure started at the age of 37 with menopause at the age of 44, is presented. The cytogenetic analysis showed the presence of three different cell lines with 45,X, 46,XX and 47,XXX karyotypes. It is a rare type of mosaicism, combining Turner's and triple-X syndrome. Interestingly, the became pregnant and gave birth to a healthy child. Second pregnancy resulted in a miscarriage in the first trimester. 相似文献
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Bone scan has long been considered to be an important diagnostic test in searching for bone metastases. However, considerable difficulty is encountered in the vertebral region due to the complexity of structures and the fact that other benign lesions, especially degenerative changes, are very common there. Single-photon emission tomography (SPET) has been reported to be useful in the differentiation of benign from malignant conditions. Here we report our experience with bone SPET in the diagnosis of vertebral metastases. This is a retrospective study of technetium-99m methylene diphosphonate (MDP) bone scans in 174 consecutive patients who were referred for the investigation of back pain in our department. MDP planar and SPET images were obtained. Of teh 174 patients, 98 had a known history of malignant tumours. The diagnosis of vertebral metastasis was made on the basis of the patients' clinical histories and the findings with other imaging techniques such as magnetic resonance imaging, computed tomography or follow-up bone scan. We found that the presence of pedicle involvement as seen on SPET was an accurate diagnostic criterion of vertebral metastasis. SPET had a sensitivity of 87%, a specificity of 91%, a positive predictive value of 82%, a negative predictive value of 94% and an accuracy of 90%. On the other hand, planar study had a sensitivity of 74%, a specificity of 81%, a positive predictive value of 64%, a negative predictive value of 88% and an accuracy of 79% in diagnosing vertebral metastasis. Except with regard to the negative predictive value, SPET performed statistically better than planar imaging. Only 9/147 (6.4%) lesions involving the vertebral body alone and 3/49 (6.1%) lesions involving facet joints alone were subsequently found to be metastases. We conclude that bone SPET is an accurate diagnostic test for the detection of vertebral metastases and is superior to planar imaging in this respect. 相似文献
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A laryngeal mask was used after repeated ineffective attempts at intubation. Preoperative examinations failed to defect signs of a possible difficult intubation. Laryngoscopy showed a true glottis, but it was impossible to insert tube No. 6 in the trachea. Failure of attempts at intubation made us use a laryngeal mask for maintaining the patency of the upper airways. Anesthesia coursed smoothly in the presence of stable hemodynamics and gas exchange. Use of laryngeal mask helped solve the problem of unpredictable difficult intubation and provide reliable patency of the upper respiratory airways in a female patient with latent stenosis of the subglottal space. 相似文献
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J Konja G Jakovljevi? B Jaksi? D Grgicevi? M Car B Glavas 《Canadian Metallurgical Quarterly》1997,119(11-12):328-330
We report a case of acute transient cold agglutinin disease, the etiology of which we could not determine with the available methods. Cold autoagglutinins had anti I specificity, high titers of the autoantibody (> 1:1,000) and the thermal range was relative wide. Our patient had severe haemolysis and immunosuppressive therapy with methylprednisolone and cyclophosphamide was administered. It is a question how much these immunosuppresive agents influenced the recovery, and in what extent it was a self limited disease with spontaneous recovery. 相似文献
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R Moreno Gómez J Elízaga Corrales E López de Sá JL López Sendón J Fernández de Bobadilla MA García Fernández JL Delcán Domínguez 《Canadian Metallurgical Quarterly》1996,49(11):858-860
A 23 year-old primigravid woman presented eclampsia and HELLP syndrome (hemolysis, elevated liver enzymes, low platelets) with severe left ventricular dysfunction after having a cesarean section. In a few weeks, clinic disappeared and ventricular function normalized. The importance of differential diagnosis between ventricular dysfunction in eclampsia and peripartum myocardiopathy is discussed. 相似文献
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P Pusuwan S Likitmaskul S Wacharasindhu S Intarasupht V Attanatho J Mungkharak S Chiewvit R Pleehachinda 《Canadian Metallurgical Quarterly》1998,81(8):596-601
The presence or absence of thyroid glandular tissue demonstrated by thyroid scintigraphy is important for genetic and prognostic counseling and for acceleration of diagnosis in other affected siblings. Technetium-99m-pertechnetate thyroid scintigraphy was performed on 27 children with cretinism at the Division of Nuclear Medicine, Faculty of Medicine Siriraj Hospital during the 5-year period from June 1991. Based on scintigraphic findings, three main groups of thyroid localization were seen. Thirteen (48.1%) were athyrotic while 3 (11.1%) had an ectopic thyroid and 11 (40.8%) had gland in normal position. Perchlorate discharge test was performed in 8 children of the last group and the results were positive indicating an organification defect. Thyroid scintigraphy and perchlorate discharge test provided the useful information for diagnosis, follow-up, and prognosis in children with cretinism. 相似文献
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NL Kozlovskaia GS Kabaenkova VA Varshavski? MIu Shvetsov 《Canadian Metallurgical Quarterly》1995,73(3):93-96
A case of rapidly progressive nephritis is reported in a female patient having systemic lupus erythematosus (SLE) with antiphospholipid syndrome. Clinical presentation of progressive lupus nephritis with intensifying renal insufficiency, arterial hypertension, hematuria, nephrotic syndrome was associated with unusual morphological manifestations of mesangiocapillary glomerulonephritis with advanced vasculitis. The authors attribute a malignant nephritis course atypical for patients with antiphospholipid syndrome to development of renal vasculitis. The discussion covers lupus genesis of vascular involvement, a probable triggering role of antibodies to phospholipids in impairment of endothelial cells. 相似文献