Medical device guidance from an anatomical reference
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IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61F-004/00
출원번호
UP-0680288
(2003-10-08)
등록번호
US-7758587
(2010-08-09)
발명자
/ 주소
Freyman, Toby
Mickley, Timothy J.
출원인 / 주소
Boston Scientific Scimed, Inc.
대리인 / 주소
Crompton, Seager & Tufte, LLC
인용정보
피인용 횟수 :
0인용 특허 :
12
초록▼
A system and method for simply and reliably determining the location and orientation of a medical device within a patient's body. A medical device, such as a catheter, has bending indicators on or imbedded in its wall, and passes through an anatomical reference of known orientation relative to a tar
A system and method for simply and reliably determining the location and orientation of a medical device within a patient's body. A medical device, such as a catheter, has bending indicators on or imbedded in its wall, and passes through an anatomical reference of known orientation relative to a target site within the patient. Information from the tube bending indicators permits determination of the orientation of a feature, such as an orifice, at the distal end of the medical device relative to the anatomical reference. From the known orientation of the anatomical reference, and information on the location and orientation of the distal end of the medical device obtained from fluoroscopic imaging from a single direction, the physician may reliably determine the orientation of the distal feature relative to the target site, eliminating the need for imaging from multiple directions.
대표청구항▼
What is claimed is: 1. An apparatus for determining the orientation of a medical device within a patient's body, comprising: a catheter having a tube wall defining a lumen therethrough, wherein the catheter is radiopaque under x-ray fluoroscopy; and a plurality of tube wall bending indicators locat
What is claimed is: 1. An apparatus for determining the orientation of a medical device within a patient's body, comprising: a catheter having a tube wall defining a lumen therethrough, wherein the catheter is radiopaque under x-ray fluoroscopy; and a plurality of tube wall bending indicators located at least on or within the catheter wall at a reference portion of the catheter to become curved where the catheter passes through an anatomical reference when the distal end of the catheter is at a target site within the patient's body; wherein the plurality of tube wall bending indicators provide an indication of tube wall bending to indicate the orientation of the reference portion of the catheter relative to the anatomical reference; wherein the tube wall bending indicators comprises: a plurality of strain gauges for providing said indication of tube wall bending by changing an electrical resistance in accordance with an amount of tube wall bending within the vicinity of each strain gauge. 2. The apparatus of claim 1, wherein the catheter further comprises: a distal outlet in communication with the lumen, and wherein the tube wall bending indicators provide an indication of the orientation of the catheter distal outlet. 3. The apparatus of claim 1, further comprising an orientation display to display an indication of the orientation of the reference portion of the catheter relative to the anatomical reference based on the electrical resistance change of the strain gauges. 4. The apparatus of claim 3, further comprising signal wires linking each of the plurality of strain gauges to the orientation display, and wherein the electrical resistance changes in the strain gauges are transmitted to the orientation display via the signal wires. 5. The apparatus of claim 1, wherein the tube wall bending indicators comprise: a plurality of rods movably embedded in the catheter wall, wherein each of the rods extends from a proximal end of the catheter to at least the reference portion of the catheter that becomes curved when the catheter is placed at the target site, the rods to provide said indication of tube wall bending by changing an amount of protrusion relative to the proximal end of the catheter in accordance with an amount of tube wall bending in the vicinity of each rod. 6. The apparatus of claim 1, wherein the strain gauges are located within the catheter wall. 7. The apparatus of claim 1, wherein bending of the tube wall imparts tensile or compressive stress on one or more of the bending indicators. 8. The apparatus of claim 1, wherein the bending indicators comprise: a plurality of rods longitudinally disposed within the tube wall, wherein each of the rods are free to move longitudinally relative to the tube wall, and wherein each of the rods extends from a proximal end of the catheter to at least the reference portion of the catheter. 9. The apparatus of claim 8, wherein the distal ends of the rods are fixed to the tube wall. 10. The apparatus of claim 8, wherein each of the rods protrudes from the proximal end of the catheter, and wherein the amount of protrusion of each rod varies according to the amount of tube wall bending in the vicinity of each rod. 11. The apparatus of claim 8, further comprising a panel at a proximal portion of the catheter, wherein the proximal ends of the rods emerge from the face of the panel. 12. The apparatus of claim 11, wherein the panel is located on the proximal end of the catheter. 13. The apparatus of claim 11, further comprising a side tube connected to a proximal portion of the catheter, wherein the rods are routed through the side tube, and wherein the panel is located on the side tube. 14. The apparatus of claim 11, wherein all the rods extend from the face of the panel approximately the same distance when the catheter is in an unbended configuration.
Moberg Sheldon B. (Kagel Canyon CA) Causey ; III James D. (Simi Valley CA), Implantable leads incorporating cardiac wall acceleration sensors and method of fabrication.
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