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21.
Metallic residues as a source of artifacts in magnetic resonance imaging of the temporomandibular joint 总被引:2,自引:0,他引:2
OBJECTIVES: To establish the source of metallic artifacts on postoperative MRI of the temporomandibular joint after arthroplasty. METHODS: An experiment was carried out to evaluate MR artifacts which were thought to have been caused by minute metallic particles deposited at surgery. Four types of cutting instruments were used to cut an extracted tooth: a diamond bur attached to a dental air turbine handpiece, a steel bur and bone bur attached to a dental micromotor handpiece and a bone file. The tooth fragments were collected in plastic centrifuge tubes in water. These samples were evaluated with six MR sequences. RESULTS: MR artifacts were clearly demonstrated in samples using the bone bur and the bone file but not the diamond and steel burs. CONCLUSIONS: The artifacts seen on postoperative MRI were derived from minute metal particles from the bone bur or file used for condylar arthroplasty. Metal artifacts should be considered when interpreting postoperative MR images. 相似文献
22.
Inagaki M Yabuki H Hashimoto M Maguchi M Kino S Sawa M Ojima H Tokusashi Y Miyokawa N Kusano M Kasai S 《Surgery today》1999,29(12):1260-1263
We describe herein the case of a 51-year-old woman in whom metastatic tumor seeding of the percutaneous transhepatic biliary
drainage tract occurred following a pancreatoduodenectomy for carcinoma of the distal common bile, duct. An abdominal computed
tomography scan done 6 months after the initial operation detected a hepatic lesion located at the site of the previous percutaneous
transhepatic biliary drainage tract. Implantation of bile duct carcinoma in the drainage tract was diagnosed, and the recurrent
tumor was successfully resected by performing a subsegmentectomy of segment 3 and removal of the adjacent abdominal wall.
At present, 5 years and 4 months after the second resection, the patient is in good health without any signs of recurrence.
This case report demonstrates that an aggressive surgical approach should be performed for tumor seeding of a transhepatic
biliary catheter tract. 相似文献
23.
Ultrasonographic follow-up of the healing process of medically treated hypertrophic pyloric stenosis
In hypertrophic pyloric stenosis (HPS), prompt pyloromyotomy is, in general, the treatment of choice. There has been no information
available as to the natural history of the pyloric tumour. We present four infants with medically treated HPS who were followed
by sonography to observe the anatomical changes that occur with atropine sulfate. The initial change was shortening of the
pyloric canal, followed by thinning of the muscular layer as clinical symptoms improved.
Received: 29 September 1997 Accepted: 3 October 1997 相似文献
24.
J. Takaya R. Ishihara M. Kino H. Higashino Y. Kobayashi 《European journal of pediatrics》1998,157(7):544-546
Adrenal enlargement was followed by serial ultrasonography in an infant with congenital lipoid adrenal hyperplasia (lipoid
CAH) from day 12 until 2 years and 4 months of age, when they were no longer detectable. Contrary to other types of CAH in
which the configuration changes soon after replacement therapy, this infant with lipoid CAH showed persistent adrenal cortex
enlargement due to massive accumulation of lipids and cholesterol resulting in a damaged glandular cyto-architecture.
Conclusion ultrasonographically persistent enlargement of the adrenals after replacement therapy is suggestive of the lipoid form of
CAH.
Received: 3 June 1997 / Accepted in revised form: 19 December 1997 相似文献
25.
Emergency and elective embolotherapy of various systemic arteries in 64 patients was carried out at a tertiary centre of Armed Forces. Specific indications were haemoptysis (n=43), preoperative (n=18), haematuria (n=1), epistaxis (n=1) and chemoembolization (n=1). The procedures were performed with gelfoam pellets (n=46), gelfoam pellets and absolute alcohol (n=1), polyvinyl alcohol particles (PVA) (n=14), steel coils (n=2) and Adriamycin-in-oil emulsion (n=1). Embolotherapy resulted in complete haemostasis in 37 (82.2%) out of 45 cases of haemorrhage. In eight cases (17.8%), it resulted in significant improvement. Complete haemostasis was achieved in both cases of haematuria and epistaxis. Pre-operative embolotherapy resulted in considerable reduction of peroperative blood loss in all the cases. Chemoembolization of Hepatocellular carcinoma resulted in partial regression of the tumour. The purpose of this study was to assess the efficacy, safety and reliability of vascular embolotherapy for control of life threatening haemorrhage and preoperative reduction of lesions.KEY WORDS: Embolization, Embolotherapy, Haemorrhage 相似文献
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用固相法合成了hF-GRP及其15个类似物。全部裂解均用三氟甲磺酸完成。产物总收率60%~80%。对所有合成肽进行了影响离体的小鼠垂体分泌LH的活性筛选。结果表明,当合成肽的浓度为0.05mmol/L时:(1)将hF-GRP的C端COOH变成CONH2,活性变化不大;(2)C端残基Asn14被Phe替换后刺激垂体分泌LH的活性明显高于hF-GRP;(3)Thr3被Tyr替换后片段hF-GRP(3~13)有抑制LH分泌的活性;(4)其余类似物与空白对照相似。 相似文献
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30.
Akhilesh Dubey Cynthia Lizzie Lobo Ravi GS Amitha Shetty Srinivas Hebbar Sally A.El-Zahaby 《Asian Journal of Pharmaceutical Sciences》2022,17(1):20-34
The spread of SARS-CoV-2 as an emerging novel coronavirus disease (COVID-19) had progressed as a worldwide pandemic since the end of 2019. COVID-19 affects firstly lungs tissues which are known for their very slow regeneration. Afterwards, enormous cytokine stimulation occurs in the infected cells immediately after a lung infection which necessitates good management to save patients. Exosomes are extracellular vesicles of nanometric size released by reticulocytes on maturation and are known to m... 相似文献