发明申请
- 专利标题: Optical guidance system for invasive catheter placement
- 专利标题(中): 用于侵入性导管放置的光学引导系统
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申请号: US10482190申请日: 2002-06-19
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公开(公告)号: US20050070788A1公开(公告)日: 2005-03-31
- 发明人: David Wilson , Gregory Schears
- 申请人: David Wilson , Gregory Schears
- 国际申请: PCT/US02/19314 WO 20020619
- 主分类号: G01V8/16
- IPC分类号: G01V8/16 ; A61B5/06 ; A61J15/00 ; A61M25/00 ; A61M25/01 ; A61B5/05
摘要:
Light from a small laser diode is inserted in a distal end of a catheter and passed through an optical fiber that is either included in the lumen or incorporated into the wall of an invasive catheter tube during manufacture. The light is selected to be of a wavelength that is minimally absorbed by tissue, preferably in the range from about 620 nm to 1100 nm. 780 nm is preferably used as this is where the tissue absorption is near a minimum. The light passes out the end of the fiber (at the proximal end of the catheter) and through the tissue to the outside of the patient's skin where it is measured. The light pattern is observed by night vision goggles that filter out other frequencies of light. The detected light permits location of the end of the fiber, the positional accuracy depending on the thickness of tissue between the fiber tip and the exterior of the body. The method is highly accurate for small children and for catheters within a few centimeters of the skin surface of adults.
公开/授权文献
- US07273056B2 Optical guidance system for invasive catheter placement 公开/授权日:2007-09-25