The task-driven personal teaching model of Medical Info rmation Retrieval was designed according to the individual differences in medical undergraduates and the characteristics and processes of task-driven teaching followed by an elaboration on its implementing methods, such as investigating the information literacy of medical undergraduates, teaching in classification of medical undergraduates, designing teaching task, completing teaching task, assessing infor-mation literacy of medical undergraduates and applying knowledge in medical undergraduates.

From the view of ergonomics study,the importance of optimized design for human-computer coordination work is presented. Through the analysis of probably reasons for the ergonomics accidents in the process of human-computer coordination work,the methods and realization of the optimized design are given out. Furthermore,the studies of human-computer systematization design in preventing the accidents are also discussed.

Objective: To explore the symptomatic level of personality disorders,family environment of college students, and the correlation between these two variables. Methods: PDQ-4+(Personality Diagnostic Questionnaire-4+) and AAQ3.1 were administrated to 320 college students by layered sample. Results: Significant correlation was found between several factors of personality disorders and family environment. The personality disorders group get significantly lower score in Intimacy factor and higher score in Conflicts factor of family environment than the normal group. Conclusion: There was significant correlation between symptomatic level of personality disorders and family environment.

Objective To investigate the diagnostic value of DSA for micro hepatocelluar carcinoma(MHCC)in patients with hepatic cirrhosis. Methods Three hundred and fourty cases of hepatic cirrhosis who were going to receive bone marrow stem cells transplantation via hepatic artery underwent hepatic arterial DSA. No definite evidence of hepatoma had been found during the former CT scan and ultrasound test in these patients. Multi-angle projection DSA was performed to display the characteristics of MHCC and super-selective TACE treatment was given in cases of the diagnosed MHCC. Results MHCC were found by DSA in 20 cases who were all of post-hepatitis B cirrhosis and with single-lesion of sized 0.4 - 1.0 cm. DSA showed the characteristics of nodular stains in early or middle arterial phase in angiography. 18 lesions were in the right lobe and 2 in the left lobe. AFP were negative in 16 cases and positive in 4 cases. Super-selective segmental TACE were performed with micro catheter system for the treatment. Conclusions DSA is more sensitive to detect MHCC in the patients with hepatic cirrhosis, comparing with regular contrasted CT scan or ultrasound.

Objective To evaluate interventional techniques for the treatment of visceral aneurysms. Methods A total of 11 aneurysms were found in 9 patients with visceral aneurysms who received interventional treatment. Of the 9 patients, single aneurysm at both superior mesenteric artery (SMA) and right colonic artery was seen in one, 2 aneurysms at same splenic artery in one, one aneurysm at splenic artery in 5, aneurysm at right gastric artery in one and pseudoaneurysm at hepatic artery in one. In 9 patients the transcatheter endovascular coil embolization was successfully carried out for 10 aneurysms, including splenic (n = 7), right colonic artery (n = 1), right gastric artery (n = 1) and hepatic pseudoaneurysm (n = 1). One stent-graft was used for the SMA aneurysm. Results Technical success was achieved in all cases without any serious complications. Conclusion Interventional embolization with coils can successfully occlude most visceral aneurysms, while stent-graft should be used when the aneurysm is difficult to be occluded with coil.

Objective To explore the feasibility and proper technique of subintimal racanalization in treating chronic aorto-iliac artery occlusion. Methods Subintimal racanalization via right brachial artery access was performed in a 57-years-old man with chronic total occlusion of aorto-iliac artery. Subintimal pathways were created with two hydrophilic guidwires (Teromo), which were inserted into the subintimal space from the occluded end of the abdominal aorta and got into the right and left external iliac arteries separately. Subintimal arterial flossing with antegrade-retrograde intervention was employed in left side to overcome the difficulty in reentering the true lumen. The exchange guidwires were conducted out of the femoral artery puncture sites on both sides in sequence, in this way the bilateral femoral pathways were established. Aorto-iliac artery balloon angioplasty and retrograde stent implantation, including one aortal and 5 iliac stents, were carried out by kissing technique from the femoral site. Results The aorto-iliac artery lumen was successfully reopened after the procedure. The internal lumen shape of the stents was satisfactory and the blood flow was unobstructed. The ischemic symptoms of the lower extremities disappeared completely. The ankle brachial index (ABI) rose from 0.32 to 0.96, and the condition remained stable in a follow-up period of 10 months. Conclusion Subintimal racanalization therapy is practical and safe for treating total aorto-iliac artery occlusion, especially for the patients with chronic arterial sclerosis.

Objective To establish an animal model of acute superior mesenteric artery embolization suitable for follow-up embolectomy study. Methods Via the femoral artery approach selective catheterization of the main branch of superior mesenteric artery with a 8 F-guiding catheter was performed in 8 hybrid dogs,which was followed by the injection of auto-clots prepared in vitro until the main branch of superior mesenteric artery was completely occluded,which was confirmed with angiography. Follow-up angiography of superior mesenteric artery was carried out 2,4,6 and 8 hours after the procedure to check the stability of the auto-clots and the embolization. Intraperitoneal explore through abdominal incision was performed and abnormal bowel was taken out for pathologic examination. Results The acute superior mesenteric artery embolization model was successfully established in all 8 dogs. Intestinal ischemia was found in all of the 8 dogs. Macropathologically and microscopically,the intestinal ischemic damage deteriorated gradually with time. Conclusion Interventional technique can successfully establish appropriate animal model of acute superior mesenteric artery embolization,which is suitable for the follow-up embolectomy study.

Objective To discuss the therapeutic efficacy of bidirectional subintimal angioplasty in the treatment of atherosclerotic occlusive of lower limbs.Methods Five patients with long segment of obstructed artery in lower limb were enrolled in the study.Of five patients,occlusion of the lower segment of abdominal aorta and bilateral iliac artery was seen in one,occlusion of iliac artery in 2 and occlusion of superficial femoral artery in the remaining two.Antegrade subintimal angioplasty procedure was unsuccessful in all five patients as the wire could not be placed into the true lumen,so retrograde subintimal angioplasty by puncturing the distal segment of the occlusive artery was employed.Through the newly created channel the retrograde guide wire was manipulated to be pulled out of vessel through the antegrade catheter.The subintimal tract was dilated with angioplasty balloon and the stent implantation was performed.Results Bidirectional subintimal angioplasty was successfully accomplished in all five patients,with a total of nine stents being implanted.Conclusion Bidirectional subintimal angioplasty is a safe and effective procedure for bringing the subintimal recanalization to success,this technique can be regarded as a remedial measure when unidirectional subintimal angioplasty ends up in failure.