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1.
Hysterosalpingography was performed in 31 patients by means of a low-dose scanning-beam digital radiographic system. The technique permits adequate evaluation of gynecologic abnormalities while allowing significant reduction in radiation: 2.4-mR (6.1 X 10(-7) C/kg) exposure to the skin and 0.7-mrad (7 X 10(-6) Gy) mean dose to the ovaries per image obtained. Sixteen patients demonstrated readily recognizable and documented abnormalities, corroborated by laparoscopy, laparotomy, or other supportive evidence. 相似文献
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F. R. VOGELPOEL R. J. VAN KOOIJ E. R. TE VELDE J. VERHOEF 《International journal of andrology》1990,13(2):81-86
Isolated sperm from normo-, oligo- and astheno-spermic men were incubated for 20 h in medium supplemented with 8% heat-inactivated or untreated human serum, and in medium with heated or untreated serum deficient in complement factor C3. Before and after incubation, sperm motility was assessed by means of a computer-assisted semen analyser. The results did not show significant differences between the motility of sperm incubated in heated or untreated serum. It is concluded that heating of homologous serum is not necessary for preserving sperm motility and in some cases may even be disadvantageous. 相似文献
4.
Avascular necrosis after scaphoid fracture: a correlation of magnetic resonance imaging and histology 总被引:3,自引:0,他引:3
T E Trumble 《The Journal of hand surgery》1990,15(4):557-564
In this study 12 male patients with fractures of the middle third of the scaphoid had an magnetic resonance imaging study before open reduction and internal fixation in conjunction with bone grafting of the scaphoid. The patients' average age was 27 years (range, 17 to 37 years). At the time of surgery biopsy specimens were obtained from both the proximal and distal poles of the scaphoid. The length of time before surgery ranged from a minimum of 1 1/2 months in recently displaced fractures to a maximum of 10 years in established nonunions. Results of the biopsy showed that six patients had avascular necrosis noted in the proximal pole fragment. In three of these six patients avascular necrosis was confirmed by the absence of tetracycline labeling despite positive uptake noted in biopsy specimens from the bone graft site; the other three patients did not receive tetracycline labeling. Magnetic resonance imaging showed that all six of the patients with biopsy specimens of the proximal poles showing avascular necrosis demonstrated decreased signal intensity in the proximal pole fragment, whereas the plain radiographs demonstrated changes in the proximal pole in only three of the six patients. A decreased signal intensity from the proximal pole of the scaphoid may indicate a poor prognosis inasmuch as only three of the six patients had healing of the fracture even with bone grafting and internal fixation. 相似文献
5.
Image-directed percutaneous biopsies with a biopsy gun 总被引:3,自引:0,他引:3
Core tissue for histologic study is believed by many pathologists to be more diagnostic than material from needle aspiration. Recently, a biopsy "gun" has been introduced, which simplifies core biopsies. With this device, 182 biopsies of multiple anatomic sites were performed with ultrasonic, computed tomographic, and fluoroscopic guidance and 18-gauge needles. High-quality histopathologic specimens were obtained in 177 of the biopsies, and diagnostic target tissue was obtained in 167. Only three significant complications occurred: one bleeding complication that required transfusion and two cases of pneumothorax that necessitated placement of chest tubes. The biopsy gun eliminated the disjointed movements of conventional "skinny" needle biopsies, and none of the samples demonstrated significant "crush" artifact or obscuring blood, problems that are commonly associated with manual biopsy techniques. Patient discomfort was decreased with this system compared with that of manual biopsies, and the total procedure time was reduced. Because of these distinct advantages, the authors now use the biopsy gun exclusively for all percutaneous biopsies and recommend that other institutions consider the use of this biopsy method. 相似文献
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Pattisapu JV Trumble ER Taylor KR Howard PD Kovach TM 《Neurosurgery》1999,45(6):1361-6; discussion 1366-7
8.
Patients with severe early-onset Blount disease (Langenskiold III or greater) often have the radiographic appearance of depression of the medial tibial plateau and delayed ossification of the epiphysis, adjacent physis, and metaphysis. Schoenecker and other authors recommended elevation of the medial plateau of the tibia for correction of this deformity. The purpose of this study was to assess the nature of the medial proximal tibia in these severe cases. Eight girls and two boys (17 tibiae) with severe early-onset Blount disease had standing radiographs and magnetic resonance imaging (MRI) evaluation. Average patient age was 5.8 years (range, 3-8 years). Eleven knees in eight patients underwent arthrography at the time of surgical correction of deformity. No tibia had MRI or arthrographic evidence of medial tibial joint "depression." The "empty" radiographic space was occupied by cartilage-density material. A smooth dye contour without pooling parallel to the femoral condyles was noted arthrographically in all instances. These findings do not support the concept of routine joint elevation in the correction of severe deformity associated with early-onset Blount disease. 相似文献
9.
目的观察去甲硫氨酸全肠外营养对大鼠血清氨基酸谱等的影响.方法 Wistar大鼠24只,随机分为含甲硫氨酸(+MetTPN,n=12)和去甲硫氨酸全肠外营养2组(-MetTPN,n=12),分别给予相应的TPN支持.治疗7d后,每组随机抽取6只大鼠处死,检测血清FAA(HPLC法)、肝肾功能和全血常规,同时作心、肺、肝、肾组织病理学检查.两组其余大鼠继续原TPN治疗,观察生存期.结果 -MetTPN组大鼠血清游离Met、Cys明显降低,Asp、Glu、Ser等显著增高;大鼠体重下降;血清总蛋白和白蛋白水平下降;血常规和肾功能未见明显异常;组织学检查见肝细胞轻度肿胀,细胞核仁增粗,心肺肾未见明显异常;平均生存18d.对照组上述检查未见异常,除一只大鼠因导管并发症于TPN第16d死亡,其余大鼠全部存活.结论 -MetTPN一周可致大鼠血清游离Met、Cys明显降低和Asp、Glu、Ser等显著增高,及轻度肝功能改变;随着-MetTPN时间延长,出现严重的代谢紊乱和器官功能障碍导致死亡. 相似文献
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