ABSTRACT
Objective To develop a tracking monitor for patient vital signs after CT and MRI enhanced scanning so as to execute auto alarm in case of patient discomfort and allergic reactions.Methods The monitor composed of a sub machine,a principal machine and a large-screen display used ultra-low power digital blood oxygen plate LPDSPO2V1.4 and fingertip sensor to acquire data on blood oxygen saturation and heart rate,the acquired data were transmitted to the principal machine with NRF24L01 wireless transmission module, and then the principal machine executed data auto analysis, storage, auto alarm for out-of-limit data and sent the data to the display.Results The monitor could be used for checking blood oxygen saturation and heart rate as well as implement early warning against allergic reactions.One-year trials proved that there were no death in case 87 cases of minor allergic reactions and 3 severe ones occurred.Conclusion The monitor proves its safety and efficiency by decreasing the incidence rate of severe reactions after CT and MRI enhanced scanning,and thus is worthy promoting clinically.
ABSTRACT
<p><b>OBJECTIVE</b>To assess the clinical value of three-dimensional contrast-enhanced magnetic resonance angiography (3D-CE-MRA) in the diagnosis of mesenteric arteriosclerosis.</p><p><b>METHODS</b>3D-CE-MRA of the mesenteric arteries was performed in 21 patients with 23 healthy subjects as the control. After 3D image reconstruction and maxi intense projection, and the abnormalities of the mesenteric arteries were observed and analyzed. The diameter and number of the arterial branches were compared between the patients and the control subjects.</p><p><b>RESULTS</b>All the 21 patients suffered arteriosclerosis in the arteries other than the mesenteric arteries. On 3D-CE-MRA, mesenteric arteriosclerosis was characterized by thinning of the arterial trunk, luminal stenosis, irregular arterial margins and homo- or heterogeneous thickening of vascular walls. Multiple filling defects were found in the mesenteric artery lumens with reduced second order branches, which showed rigid lining with dashed line appearance or disappeared in some cases. The inferior mesenteric arteries were seen in only 2 patients. The diameters of superior and inferior mesenteric arteries were 3.8-/+0.32 mm and 1.20-/+0.12 mm in the patients, significantly smaller than those of in the control subjects (6.51-/+1.01 mm and 2.90-/+0.90 mm, respectively, P<0.01). The number of the mesenteric artery branch of the patients was also significantly reduced as compared with that in the control subjects (P<0.05). In som cases, the intestinal enhancement was attenuated with the intestinal contraction, dilatation and lowering of the intestinal tension.</p><p><b>CONCLUSION</b>3D-CE-MRA can clearly display mesenteric arteriosclerosis and secondary intestinal changes, and provides a useful means for the diagnosis and assisting the therapy of mesenteric arteriosclerosis.</p>