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Lateral view of the left common carotid angiogram 3 months after stenting shows mild restenosis in the proximal external carotid artery (black arrow). the internal carotid artery (white arrow) is more atretic. the ascending pharyngeal artery (black arrowhead) is more evident due to augmented blood flow in the external carotid artery. the occipital artery (white arrowhead) is slightly stenotic.
Source publication
Collateral networks between the external carotid artery and internal carotid arteries become crucial for cerebral perfusion after occlusion of internal carotid arteries. We report the first case of a patient who received percutaneous transluminal angioplasty and stenting in a collateral vessel between the external and internal carotid artery for tr...
Context in source publication
Context 1
... extracranial anastomosis between the cervical ICa and eCa are embryonically derived from proatlan- tal type II, proatlantal type I and hypoglossal kept active partial thromboplastin time at at least two times above the normal value. Percu- taneous transluminal angioplasty was per- formed with a Maverick catheter (Boston Sci- entific Fremont, Ca, uSa) sized at 2.5×20 mm, following which a carotid Wallstent (Boston Scientific Fremont, Ca, uSa) sized at 7×40 mm was placed into the left external carotid ar- tery, with control angiography showing excel- lent results (Figure 3). the patient tolerated the procedure well, and his symptoms resolved within one week. ...
Citations
As a typical brittle material, Potassium Dihydrogen Phosphate (KDP) crystal exhibits anisotropic mechanical property during processing. The most general method to produce smooth and crack-free KDP surface is single point diamond fly-cutting (SPDF). In processing KDP by SPDF, cutting direction has great influence on the cutting force and the quality of the machined surface. Thus, selecting an optimal cutting direction is of great significance in decreasing the cutting force and improving the surface quality. In this paper, influence of cutting direction on the brittle ductile transition (BDT) depth and cutting force in machining KDP crystal has been investigated. Cutting experiments are carried out on the (001), Doubler and Tripler plane of KDP crystal to find out the change law of cutting force and BDT depth related to cutting direction. Theoretical models for calculating the cutting force and conditions for achieving crack-free surface in cutting by circular edge cutter have also been established. The predicted results coincide well with the experiment results, which have proved the validity of the proposed models. The experimental results in this study can provide guidelines for optimizing the processing parameters in fly-cutting of KDP crystal, and the theoretical models can be extended to study the cutting mechanism of other brittle materials.
