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排序方式: 共有1277条查询结果,搜索用时 250 毫秒
91.
Glatz FR Kalkanis J Neumeister M Suchy H Lyons S Mowlavi A Mowlawi A 《The Laryngoscope》2003,113(7):1113-1117
OBJECTIVE: To compare the volume retention of injected preadipocytes with that of standard fat injection in a paralyzed rabbit true vocal cord. STUDY DESIGN: Prospective analysis with blinded data collection. METHODS: Thirteen New Zealand white rabbits were divided into two groups. Group 1 consisted of seven animals undergoing left-side vocal cord paralysis by resection of a 1-cm segment of the left-side recurrent laryngeal nerve and abdominal fat harvest for isolation of preadipocytes. Preadipocytes were cultured under sterile conditions in cell culture media. Animals in group 2 also underwent left-side vocal cord paralysis without fat harvest. After 10 to 14 days, in a second procedure, group 1 underwent injection of 0.1 mL cultured autologous preadipocytes, and group 2 underwent routine injection of 0.1 mL abdominal fat harvested during the same procedure. At 6 and 12 months, volumetric analysis was performed. RESULTS: Volume analysis at 6 months showed a mean volume of 0.029 mL retained fat in group 2 representing a retention of approximately 29% (SD = 0.023) of the original injected volume. Retention in group 1 animals approximated 0.002 mL (SD = 0.0024) or 2% of the injected volume. Analysis at 12 months showed a mean volume of 0.008 mL (SD = 0.0078) in group 2 and of 0.002 mL (SD = 0.0015) in group 1. Group 2 showed significantly higher volumes of the injected fat at 6 and 12 months (P <.033). CONCLUSION: Volumes obtained with standard fat injection were superior to those obtained with preadipocyte injection at both 6 and 12 months. 相似文献
92.
Glatz Z Moravcová M Janiczek O 《Journal of chromatography. B, Biomedical sciences and applications》2000,739(1):101-107
A new method for the determination of pyrroloquinoline quinone by capillary zone electrophoresis has been developed. Separation conditions have been optimised with the respect to different parameters including pH and ionic strength of the background electrolyte, separation voltage and temperature of the capillary. A buffer consisting of 50 mM beta-alanine-HCl pH 3.0 was found to be the most suitable electrolyte for this separation. An applied voltage of 25 kV (negative polarity) and a temperature of 25 degrees C gave the best analysis of pyrroloquinoline quinone. The linear detection range for concentration versus peak area for the assay is from 5 to 500 microM (correlation coefficient 0.9998) with a detection limit of 0.1-0.2 microM. The inter-day reproducibility of the peak area was 2.5% and the inter-day reproducibility of the migration time was below 0.18%. 相似文献
93.
银杏叶制剂对心绞痛患者的抗氧化和抗脂质过氧化作用 总被引:15,自引:0,他引:15
目的:探讨银杏叶制剂对心绞痛患者的抗氧化和抗脂质过氧化作用。方法:检测了78例心绞痛患者经银杏叶制剂“天宝宁”治疗前后的血浆维生素C(P-VC)、维生素E(P-VE)、β-胡萝卜素(P-β-CAR)、过氧化脂质(P-LPO)以及红细胞超氧化物歧化酶(E-SOD)、过氧化氢酶(E-CAT)、谷胱甘肽过氧化物酶(E-GSH-PX)、过氧化脂质(E-LPO)值。结果:与治疗前比较,治疗后的P-VC、P- 相似文献
94.
Mercado S; Hunter DW; Castaneda-Zuniga WR; Amplatz K; Young AT; Cardella JF; Lange PH; Hulbert JC; Reddy P 《Radiology》1986,158(1):207-209
Percutaneous nephrostolithotomy, which can require a double puncture, is presently the method of choice in our institution for the removal of renal stones. Patients that underwent this procedure were evaluated to identify the possible reasons for the double puncture. Of 200 patients evaluated, 14 needed a second tract. The three variables that determined whether a second puncture was needed, in order of importance, were number and size of the stones, with second tracts needed in patients with multiple stones and staghorn calculi; anatomical variations of the renal collecting system itself, with bifid systems the most significant anatomic variation; and the dexterity of the radiologist in performing the puncture and the ability of the urologist to extract the stone. Second tracts were needed more frequently in patients who presented with stones in both the lower and middle poles of the collecting systems. 相似文献
95.
Darcy MD; Cardella JF; Hunter DW; Smith TP; Castaneda-Zuniga WR; Lund G; Amplatz K 《Radiology》1986,161(3):611-614
The Amplatz retrievable vena caval filter was designed in an attempt to decrease complications associated with the placement of Mobin-Uddin or Kimray-Greenfield filters. The design allows percutaneous retrieval, thus expanding application of the filter to situations requiring temporary prophylaxis against pulmonary embolism. Filters have been placed in 16 patients, nine (56%) for prophylactic purposes. All filters were easily inserted percutaneously. Complications occurred in three patients; these included complete thrombosis of the inferior vena cava below the filter, misplacement of one filter into the pericaval retroperitoneal tissue, and development of thrombus cranial to the filter. With the current introduction system, the possibility of filter misplacement has been essentially eliminated. No patient experienced symptoms suggestive of pulmonary embolism after filter insertion. One filter retrieval has been performed, with no complications. 相似文献
96.
A prospective evaluation of color flow mapping and real-time ultrasound was performed to determine if pseudoaneurysms could be distinguished from other causes of masses surrounding vascular grafts of the lower extremities. Twelve palpable pulsatile masses were imaged. Diagnoses were confirmed at angiography (n = 11), computed tomography (n = 7), aspiration biopsy (n = 5), and operative intervention (n = 6). A swirling pattern of blood flow was seen in six of seven cases of pseudoaneurysm. Lack of flow signals was noted in four of the five collections representing hematoma (n = 2) or infection (n = 2). The seventh case was later shown to be an infected, thrombosed pseudoaneurysm. The single false-positive diagnosis was made early in the series when the flow signals detected were due to transmitted arterial pulsations. The authors conclude that color Doppler flow imaging is useful in the differential diagnosis of pulsatile masses associated with prosthetic grafts. Prosthetic graft pseudoaneurysms have a specific appearance of swirling blood flow arising from a wide neck and are distinguishable from traumatic or iatrogenic pseudoaneurysms of the native vascular tree. 相似文献
97.
Segmental dilatation of the small bowel is a rare congenital abnormality that occurs mainly in children and produces significant nonspecific symptoms. The authors reviewed 33 cases reported in the literature and present three new cases in which the lesion was demonstrated on radiographs obtained before laparotomy. These cases showed the spectrum of symptoms and characteristic radiologic features of this condition in both plain abdominal radiographs and barium studies. Plain radiographs of the abdomen may show an isolated loop of bowel containing an air-fluid level. The characteristic finding in barium studies of the small bowel is a localized dilatation of the small bowel lumen with afferent and efferent loops. In the absence of a complication or coexistent cause of obstruction, the transit time of contrast medium through the small bowel is not delayed. The radiologic examination is useful in diagnosis, and the condition is cured with surgery. 相似文献
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