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Method for enhancing ultrasound visibility of hyperechoic materials
专利权人:
发明人:
Frederick A. Ahari,John S. Fisher
申请号:
US13911708
公开号:
US09636189B2
申请日:
2013.06.06
申请国别(地区):
US
年份:
2017
代理人:
摘要:
A hydrogel plug is placed under stress during its curing stage, in one embodiment, by application of an externally applied force. The stress may also be induced during or after the dehydration process. The direction of the externally applied force increases the length, width, depth, or radial extent of the plug. The elastic limit of the plug is exceeded when the external force is applied so that the plug substantially retains its stressed size and shape when the externally applied force is removed. When the stretched or otherwise deformed dehydrated plug is hydrated, it substantially returns to the configuration it had prior to its dehydration and prior to the application of the externally applied force.
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