Alexander Slocum,Erik Bassett,Jeffrey M. Karp,Robert S. Langer,Omid C. Farokhzad
申请号：
US12525931
公开号：
US08920388B2
申请日:
2008.02.07
申请国别(地区):
US
年份:
2014
代理人:
摘要：
An apparatus provides feedback regarding the material in which tip of the apparatus is located as the tip is advance into matter of varying resistances. The apparatus responds to a change in pressure, force, or other parameter such that when the tip reaches matter of a certain resistance, a change in the parameter is sensed. The apparatus provides a driving force to a penetrating medical device, such as a needle, when the apparatus tip encounters material of high resistance. When the apparatus tip encounters a low resistance material, no further driving force is applied to the apparatus. An inner core may be advanced into the low resistance material for deployment of a gas or a liquid as desired.
