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排序方式: 共有2067条查询结果,搜索用时 15 毫秒
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Steven Appleby MD Kent Mcallister RT Morton J. Kern MD 《Catheterization and cardiovascular interventions》2008,71(6):800-802
After inserting a catheter into a vessel, guidewire exchange technique must be used to maintain vascular access. If the lumen of the catheter is blocked and the guidewire exchange cannot be used, the catheter can only be removed, vascular access is lost, and an alternate vascular approach attempted. We describe a technique to remove the blocked catheter and still maintain vascular access. © 2008 Wiley‐Liss, Inc. 相似文献
44.
Kaufmann H Krömer E Nösslinger T Weltermann A Ackermann J Reisner R Bernhart M Drach J 《European journal of haematology》2003,71(3):179-183
OBJECTIVES: Deletion of chromosome 13q [del(13q)] has emerged as a major adverse prognostic factor in multiple myeloma (MM). Del(13q) is detected two to three times more frequently by interphase fluorescence in situ hybridization (FISH) than by metaphase cytogenetics (CG). However, it has remained unclear whether or not del(13q) detected by FISH only provides the same prognostic information as its detection by CG. METHODS: We investigated the outcome of 118 consecutive patients with newly diagnosed MM who were studied by both CG and FISH (RB-1 and/or D13S319 probes). RESULTS: CG revealed informative MM karyotypes in 35 patients (29.7%), with monosomy 13/del(13q) in 16 of them. FISH was indicative for a del(13q) in 43 patients (36.4%). A del(13q) by FISH was present in all 16 patients with monosomy 13/del(13q) by CG and also in four of 19 patients with informative karyotypes and diploid chromosome 13. Furthermore, del(13q) was present by FISH in 23 of 84 patients with diploid/non-informative metaphases by CG. Overall survival of patients with monosomy 13/del(13q) by CG and of patients with del(13q) by FISH only was not significantly different (median, 35.2 months vs. 33.2 months, P = 0.58). In contrast, patients with diploid chromosome 13 by either technique experienced prolonged survival (median, 65.6 months). Presence of abnormal karyotypes was significantly associated with an increased Ki67 growth fraction. CONCLUSION: FISH of chromosome 13q adds prognostic information to that provided by CG. It is suggested to use FISH analysis in clinical trials if risk stratifications take into consideration the chromosome 13q status. 相似文献
45.
Martin Unverdorben René Quaden Christian Werner Peter Bloss Ralf Degenhardt Hanns Ackermann Christian Vallbracht 《Catheterization and cardiovascular interventions》2003,58(1):29-33
An increasing number of centers are reusing PTCA catheters even though manufacturers warrant single use only. This prospective bench laboratory trial addresses the quality of PTCA balloon catheters after up to three resterilization cycles in order to determine whether a larger trial is warranted to discern whether catheters should be reused. Forty PTCA catheters from two different manufacturers (nominal diameters 1.5 and 3.0 mm) were taken from the shelf. An independent institute tested mechanical properties such as burst pressure, nominal diameter, crossing profile, and balloon surface. The crossing profile increased by 22.5%-39.2% with no additional deterioration after repeated sterilizations. The nominal diameter either increased or decreased by a maximum of 47%. In all 1.5 mm balloons, the burst pressure remained above the manufacturers' values, whereas in the 3.0 mm balloons, the value dropped below the rated burst pressure in 40%-50% of the trials. In conclusion, in both catheter types analyzed, reuse was associated with a considerably worse quality, which puts in question their routine clinical use. 相似文献
46.
Wagenblast J Hambek M Baghi M Gstöttner W Strebhardt K Ackermann H Knecht R 《Journal of cancer research and clinical oncology》2008,134(3):323-330
Purpose
Proteasome inhibition has been shown to be effective in multiple myeloma and solid tumor models. In this in vitro study, we investigated the antitumor effect of bortezomib (Velcade®) in squamous cell carcinoma of the head and neck (SCCHN) cell lines and examined the interaction of the drug with docetaxel (TAX) and cisplatin (CDDP).Methods
Dose escalation studies were performed with eight squamous cell carcinoma cell lines using bortezomib alone or in combination with TAX or CDDP. Growth inhibitory and proapoptotic effects were measured quantitatively using cytohistology and western blot analysis.Results
Bortezomib alone showed a significant antiproliferative activity in all SCCHN cell lines (P = 0.012), and the activity was further enhanced by the addition of TAX or CDDP (P ≤ 0.036). When the combination of bortezomib and CDDP was used, the dose of the latter could be reduced to yield the same antiproliferative effect as the cytotoxic drug alone (P < 0.012).Conclusions
Our results indicate that bortezomib increases the cytotoxic activity of TAX and CDDP in SCCHN cell lines. In vivo and in the clinical setting, the addition of bortezomib may allow to reduce the doses of TAX or CDDP to decrease the systemic toxicity of these drugs.47.
Virginie Lambert Delphine Ladarre Feriel Fortas Philippe Durand Pierre Hervé Emmanuel Gonzales Florent Guérin Laurent Savale Valérie A. McLin Oanez Ackermann Stéphanie Franchi-Abella 《Archives of Cardiovascular Diseases》2021,114(3):221-231
Central illustration. Time of occurrence and outcome of cardiovascular disorders in patients (pts) with congenital portosystemic shunt (CPSS). Patients with normal anatomy and those with congenital heart disease (CHD) were distinguished. Heart failure (HF) was the main symptom in both the prenatal and neonatal periods, whereas portopulmonary hypertension (PPH) and hepatopulmonary syndrome (HPS) represented the major concerns beyond the first months of life. CV: cardiovascular; NAS: no additional symptoms; PH: pulmonary hypertension; RD: respiratory distress. aFetal diagnosis of CPSS. bNeonatal diagnosis of CPSS. cDiagnosis of CPSS > 1 month of age 相似文献
48.
Marc H. V. Van Regenmortel Hans-Wolfgang Ackermann Charles H. Calisher Ralf G. Dietzgen Marian C. Horzinek Gunther M. Keil Brian W. J. Mahy Giovanni P. Martelli Frederick A. Murphy Craig Pringle Bert K. Rima Tim Skern H.-J. Vetten Scott C. Weaver 《Archives of virology》2013,158(5):1115-1119
The Executive Committee of the International Committee on Taxonomy of Viruses (ICTV) has recently decided to modify the current definition of virus species (Code of Virus Classification and Nomenclature Rule 3.21) and will soon ask the full ICTV membership (189 voting members) to ratify the proposed controversial change. In this discussion paper, 14 senior virologists, including six Life members of the ICTV, compare the present and proposed new definition and recommend that the existing definition of virus species should be retained. Since the pros and cons of the proposal posted on the ICTV website are not widely consulted, the arguments are summarized here in order to reach a wider audience. 相似文献
49.
Righesso L. A. R. Terekhov M. Götz H. Ackermann M. Emrich T. Schreiber L. M. Müller W. E. G. Jung J. Rojas J. P. Al-Nawas B. 《Clinical oral investigations》2021,25(10):5843-5854
Clinical Oral Investigations - Micro-computed tomography (μ-CT) and histology, the current gold standard methods for assessing the formation of new bone and blood vessels, are invasive and/or... 相似文献
50.
Arnt V. Kristen Katrin Ackermann Sebastian Buss Lorenz Lehmann Philipp A. Schnabel Armin Haunstetter Hugo A. Katus Stefan E. Hardt 《Cardiovascular pathology》2013,22(4):280-286
SummaryThe detailed molecular mechanisms following activation of apoptosis in ischemia-reperfusion injury are unknown. This study using different transgenic mouse models provided first evidence that apoptosis in myocardial ischemia-reperfusion injury is rather linked to the mitochondrial pathway than to death receptor pathway.IntroductionThere is a wealth of evidence for activation of apoptosis in ischemia-reperfusion injury. However, the understanding of detailed molecular mechanism is lacking.MethodsThe extent of myocardial infarction after ligation of the left anterior descending artery in mice carrying different transgenes for inhibition of either the intrinsic or the extrinsic or a combination of both apoptotic cascades was evaluated. The extent of myocardial damage was assessed by echocardiographic determination of left ventricular (LV) ejection fraction, LV hemodynamics, troponin T, and histology. The rate of apoptosis was analyzed by terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) and caspase-3 staining.ResultsHighest perioperative rate of death was observed in the dominant-negative form of a truncated Fas-associated death domain (FADD-DN) group. Infarction size by 2,3,5-triphenyltetrazolium chloride (TTC) staining was smaller in the Bcl-2, but not in the other groups as compared to wild-type mice. This was accompanied by lower troponin T values in Bcl-2 transgenic mice as compared to the all other groups. Troponin T correlated well with macroscopic extent of myocardial infarction by TTC staining. A lower decline of LV ejection fraction was seen in the Bcl-2 as compared to wild-type or FADD-DN mice. A smaller number of TUNEL- and caspase-3-positive myocyte nuclei were observed in the Bcl-2 and FADD-DN group as compared to wild-type mice.ConclusionsWe provide first evidence for protective effects on the myocardium in a transgenic mouse model of myocardial ischemia-reperfusion due to inhibition of the Bcl-2, but not the FADD pathway despite that reduced apoptotic cells were observed in both groups as compared to wild-type mice. 相似文献