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排序方式: 共有283条查询结果,搜索用时 15 毫秒
91.
Joachim Steller 《Archives of toxicology》1955,15(3):150-154
Zusammenfassung Aus einem Gerichtsgutachten wird ein Fall mitgeteilt, bei dem infolge Überdosierung des Corbasil bei der Anaesthesie zur Tonsillektomie der Tod eintrat.Bisher ist unseres Wissens kein Todesfall durch Corbasilüberdosierung bekanntgeworden. 相似文献
92.
Daniel Steller Nele Herbst Ralph Pries David Juhl Samer G. Hakim 《Journal of cranio-maxillo-facial surgery》2019,47(2):365-372
The aim of this study was to investigate the influence of different incubation methods on the growth factor content of lysates of platelet-rich fibrin (PRF), advanced-platelet-rich fibrin (A-PRF) and platelet-rich plasma (PRP) products. A comparison of related studies suggests that the method of sample preparation has a significant influence on growth factor content. There are few reports on the comparison of non-Ca2+-activated PRP, Ca2+-activated PRP, A-PRF, and PRF, along with a lack of information on the release of PDGF-BB, TGF-β1, and VEGF among the different incubation methods.The lysate preparation was made of non-Ca2+-activated PRP, Ca2+-activated PRP, PRF, and A-PRF, using a room-temperature, 37 °C, or freeze–thaw–freeze incubation method. Afterwards the VEGF, PDGF-BB, and TGF-β1 content was investigated by running ELISA tests.Growth factor levels were significantly increased in the non-Ca2+-activated PRP with freeze–thaw–freeze incubation, and in the PRF preparation there was a significant disadvantage to using room temperature incubation for releasing growth factors.In conclusion, the freeze–thaw–freeze method is sufficient for releasing growth factors, and calcium activation is not necessary. Finally, the study demonstrates the possibility of preparing PRP products from platelet concentrates, so that preoperative blood sampling might not be required. 相似文献
93.
Steller EJ van Leeuwen MS van Hillegersberg R Schipper ME Rinkes IH Molenaar IQ 《World journal of radiology》2012,4(2):53-57
A 59-year-old woman presented with the clinical symptoms and radiologic investigations of a liver lesion suspect of metastasis. However, postoperative histopathology revealed a primary hepatic lymphoma (PHL). The case of a patient with a solitary PHL, which was treated by resection and subsequent chemotherapy, will be discussed with a short overview of the literature. 相似文献
94.
V Fulop B B Feinberg M A Steller D J Anderson R S Berkowitz 《Gynecologic oncology》1992,47(3):311-316
Complete molar pregnancy tissue is an allograft to the mother because all molar chromosomes are of paternal origin. Interactions between molar tissue and the maternal immune system may be important in the natural history of complete molar pregnancy. Molar villous fluid (MVF) has previously been demonstrated to suppress both mitogen and interleukin-2-induced T lymphocyte proliferation. The current study was undertaken to evaluate the potential effect of MVF on the cytotoxic activity of mononuclear cells (MNC) and lymphokine-activated mononuclear cells (LA-MNC). Sera and molar villous fluid were obtained from four women at the time of molar evacuation. K-562 erythroblastoid cells were used as target cells for MNC-mediated lysis, and JEG-3 choriocarcinoma cells were used as targets for LA-MNC-mediated lysis in a 51Cr release assay. Relative to patient sera, all MVF tested significantly inhibited both MNC and LA-MNC lysis of target cells (48.3 and 91% mean inhibition, respectively; P < 0.05). This study provides additional evidence that molar gestational tissue produces factor(s) that suppress maternal immunologic responses. Potential therapies may become available to reduce or eliminate the immunosuppressive effects of molar gestations resulting in a more favorable clinical outcome in patients with complete molar pregnancy and postmolar gestational trophoblastic tumors. 相似文献
95.
Neurophysiologic assessment of the anal sphincters 总被引:24,自引:24,他引:0
Steven D. Wexner M.D. Floriano Marchetti M.D. Virgilio D. Salanga M.D. Christobal Corredor R.EEG.EP. David G. Jagelman M.D. 《Diseases of the colon and rectum》1991,34(7):606-612
One hundred twenty consecutive patients with either fecal incontinence (60 patients), chronic constipation (41 patients), or idiopathic intractable pelvic pain (19 patients) were prospectively assessed. Patients underwent concentric needle electromyography (EMG), bilateral pudendal nerve terminal motor latency evaluation, anorectal manometry, and cinedefecography. The most common EMG finding in patients with fecal incontinence was decreased recruitment of motor units with squeezing and polyphasic motor unit potentials; these are consistent with an injury pattern. The most common EMG finding in the constipated patients was paradoxical puborectalis contraction. This latter abnormality was also a frequent finding in patients with rectal pain, as was prolongation of pudendal nerve latency. Paradoxical puborectalis contraction was diagnosed more frequently with EMG than with cinedefecography. Inter-examination correlation was best in the incontinent group between EMG and manometry. Cinedefecography had poor correlation with EMG in all patient groups but was valuable in the detection of additional pathology such as rectoanal intussusception and anterior rectocele. Electromyography including pudendal nerve terminal motor latency assessment is a valuable adjunct in the evaluation of disorders of evacuation. The information it yields is complementary to that offered by more routine physiologic examinations. 相似文献
96.
A sudden increase in factor VIII inhibitor development in multitransfused hemophilia A patients in The Netherlands. Dutch Hemophilia Study Group 总被引:2,自引:2,他引:0
Rosendaal FR; Nieuwenhuis HK; van den Berg HM; Heijboer H; Mauser- Bunschoten EP; van der Meer J; Smit C; Strengers PF; Briet E 《Blood》1993,81(8):2180-2186
The development of antibodies to factor VIII (inhibitors) in response to clotting-factor concentrates administration in hemophilia is common during the first few years of treatment but rare in multitransfused patients. We have investigated the possible association of a recently introduced factor VIII concentrate (Factor VIII CPS-P) in The Netherlands with the occurrence of inhibitors. To this effect, we conducted two studies. First, we performed a national multicenter study in which clinical information and inhibitor test results were obtained for 447 hemophilia A patients over the period 1988 through 1991. Secondly, for a baseline comparison we estimated the frequency of inhibitor development in a closely followed cohort of 144 patients, from 1984 through 1989. Before the introduction of Factor VIII CPS-P, the incidence of new inhibitors was 4.4/1,000 patient-years in the national study from March 1988 through May 1990, and 3.9/1,000 patient- years in the cohort followed from 1984 through 1989. These figures are similar to the incidence of new inhibitors that was found in a large cohort of patients in the United States followed in the 1970s. In the period that the new concentrate Factor VIII CPS-P was on the market, from June 1990 through November 1991, 11 clinically relevant inhibitors were detected, which yielded an incidence over this interval of 20.1/1,000 patient-years, a 4.5-fold increase compared with the previous interval (C195: 1.4 to 14.3). Nine of these 11 patients had in their lifetime received over 250 infusions with factor VIII preparations. whereas all of the inhibitors detected in the previous time interval, and all of the 24 inhibitor patients described in the US study, had received less than 250 infusions in their lifetime. All patients who developed inhibitors after June 1990 had been exposed to Factor VIII CPS-P, whereas only 75% of the patients who did not develop an inhibitor had been exposed to this product. In a prospective extension of the study, with a second inhibitor measurement after 3 months, we found that one additional inhibitor had developed during 52.5 patient-years of Factor VIII CPS-P use. In conclusion, there has been a sudden increase in the frequency of inhibitor patients, for a large part among multitransfused patients. It seems more than likely that this increase is associated with the introduction of a new factor VIII concentrate in The Netherlands.(ABSTRACT TRUNCATED AT 400 WORDS) 相似文献
97.
98.
Human heart: tagging with MR imaging--a method for noninvasive assessment of myocardial motion 总被引:30,自引:0,他引:30
Specified regions of the myocardium can be labeled in magnetic resonance (MR) imaging to serve as markers during contraction. The technique is based on locally perturbing the magnetization of the myocardium with selective radio-frequency (RF) saturation of multiple, thin tag planes during diastole followed by conventional, orthogonal-plane imaging during systole. The technique was implemented on a 0.38-T imager and tested on phantoms and volunteers. In humans, tags could be seen 60-450 msec after RF saturation, thus permitting sampling of the entire contractile phase of the cardiac cycle. Tagged regions appear as hypointense stripes, and their patterns of displacement reflect intervening cardiac motion. In addition to simple translation and rotation, complex motions such as cardiac twist can be demonstrated. The effects of RF pulse angle, relaxation times, and heart rate on depiction of the tagged region are discussed. 相似文献
99.
100.
N Yagi M Leblanc K Sakai EJ Wright EP Paganini 《American journal of kidney diseases》1998,32(6):1023-1030
Hypothermia is reported to increase intensive care unit (ICU) mortality. The heat loss that occurs during continuous renal replacement therapy (CRRT) favors the development of hypothermia. In an effort to assess the influence of CRRT on body temperature, we reviewed the records of 72 consecutive ICU patients treated with CRRT and further prospectively studied the temperature in the inlet and outlet lines for blood and dialysate of 27 other patients at various flow settings during continuous venovenous hemodialysis (CVVHD). Among the 72 retrospective cases, 36 episodes of hypothermia (core body temperature <35.5 degrees C) occurred and persisted for a mean of 2.6+/-1.8 days. It was more frequent during venovenous than arteriovenous modalities (31 of 67 v5 of 20, respectively); no patients developed hypothermia during arteriovenous slow continuous ultrafiltration (AVSCUS), whereas 48% of the patients undergoing CVVHD became hypothermic, occurring earlier in the therapy course (days 2 to 4). Mean arterial pressure (MAP) tended to increase after CRRT initiation, but absolute changes were not statistically significant. In the prospective arm, the CVVHD circuit temperatures were directly measured. Whereas no attempt was made to change body temperature, stepwise changes in blood (Qb) and dialysate flow rate (Qd) produced venous circuit temperature changes: the higher the Qb, the smaller the arteriovenous temperature differences independent of changes in Qd (P < 0.001). Also, venous circuit temperature varied directly with Qd at fixed Qb (P < 0.001). This relationship also held for temperature conversion to lost energy units per minute. Using room temperature dialysate, CRRT may significantly lower patients' core temperatures. Although the clinical significance of this effect is not clear at this point, energy loss during CVVHD may be important in hemodynamic stability or patient prognosis. 相似文献