Source: https://patents.google.com/patent/US20120265079A1/en
Timestamp: 2019-02-18 10:51:47
Document Index: 190847350

Matched Legal Cases: ['art 19', 'art 20', 'art 19', 'art 20', 'art 19', 'art 19', 'art 19', 'art 19', 'art 20', 'art 19', 'art 20', 'art 19', 'art 19', 'art.\n32']

US20120265079A1 - Sensor guide wire - Google Patents
US20120265079A1
US20120265079A1 US13/262,132 US201013262132A US2012265079A1 US 20120265079 A1 US20120265079 A1 US 20120265079A1 US 201013262132 A US201013262132 A US 201013262132A US 2012265079 A1 US2012265079 A1 US 2012265079A1
US13/262,132
2009-03-31 Priority to US20274309P priority Critical
2010-03-30 Application filed by St Jude Medical Systems AB filed Critical St Jude Medical Systems AB
2010-03-30 Priority to PCT/EP2010/054242 priority patent/WO2011120565A1/en
2010-03-30 Priority to US13/262,132 priority patent/US20120265079A1/en
2011-10-20 Assigned to ST. JUDE MEDICAL SYSTEMS AB reassignment ST. JUDE MEDICAL SYSTEMS AB ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HILMERSSON, MATS
2012-10-18 Publication of US20120265079A1 publication Critical patent/US20120265079A1/en
The present invention relates to a sensor guide wire (17) for intravascular measurements of physiological variables in a living body, having a proximal region (8), a distal sensor region (9) and a tip region (10). The sensor guide wire (17) further comprises a core wire member (11), a sensor element (14), which has a sensor portion (15), for measuring the physiological variable and to generate a sensor signal in response to said variable and a jacket (13), accommodating at least a part of said sensor element (14). The sensor portion (15), is sensitive to one or many of the physiological variables, pressure, temperature, and flow The core wire member (11) comprises two separate parts, a first core wire part (19) and a second core wire part (20), wherein a distal end (21) of said first core wire part (19) is attached to said jacket (13) proximally said sensor portion (15) and a proximal end (22) of said second core wire part (20) is attached to said jacket (13) distally to said sensor portion (15).
Throughout the application the word distal refers to the part located furthest away in respect of the operator, and the word proximal refers to the part located closest in respect of the operator.
FIG. 1 illustrates a sensor guide wire 7 according to the prior art. The sensor guide wire 7 comprises a core wire 1, a hollow tube 2, a hollow jacket 3, a sensor element 4 with a sensor portion 5, and a coil 6. The core wire 1 is at least partly disposed inside the hollow tube 2 and extends through the jacket 3 and into the coil 6. The sensor element 4, comprising the sensor portion 5, is mounted on the core wire 1 within the jacket 3, and is connected to an electronic unit (not shown in the figure) via one or several electrical leads (not shown in the figure).
In FIG. 2 is disclosed, a sensor guide wire 17 for intravascular measurements of physiological variables in a living body, having a proximal region 8, a distal sensor region 9 and a tip region 10, according to the present invention. The sensor guide wire 17 comprises a core wire member 11, a sensor element 14, which has a sensor portion 15, for measuring the physiological variable and to generate a sensor signal in response of said variable, and a jacket 13, accommodating at least a part of said sensor element 14. The sensor portion 15 is sensitive to one or many of the physiological variables, pressure, temperature, and flow. At least one signal transmitting microcable 18 is connected to said sensor element 14, and running along the sensor guide wire 17.
Furthermore, the sensor guide wire 17 comprises a coil 16 arranged in the tip region 10 and a hollow tube 12, as shown in FIG. 3, at least partly enclosing said signal transmitting microcable 18, in the proximal region 8. According to the present invention, the jacket 13 is provided with an aperture 23 in the sensor region 9, at the site, i.e the longitudinal section, where the sensor portion 15 is arranged, through which surrounding media may act on the sensor portion 15.
The core wire member 11 comprises two spatially separated parts, a first core wire part 19 and a second core wire part 20, as illustrated in FIG. 4. A distal end 21 of said first core wire part 19 is attached to said jacket 13 proximally said sensor portion 15 and a proximal end 22 of said second core wire part 20 is attached to said jacket 13 distally to said sensor portion 15. Thus, according to the embodiment shown in FIG. 4, the first core wire part 19 of the core wire is ended proximally the sensor portion 15 of the sensor element 14 and accordingly, there is no core wire at the site where the sensor portion 15 is arranged, i.e. in the longitudinal section of the sensor guide wire 17 where the sensor portion 15 is arranged.
As an obvious construction variation, the distal end 21 of the first core wire part 19 is attached to the jacket 13 proximally the entire sensor element 14.
A sensor guide wire 17 comprising a core wire member 11 having separate parts in the sensor region 9 is advantageous since no extra machining or wire shaping of the core wire member 11, at the site where the sensor element 14 is mounted, is needed.
The sensor is mounted in a cantilevering fashion such that an end comprising the sensor portion of the sensor does not contact any structure other than its mount. This prevents forces (bending artefacts) from being exerted on the sensor, which could otherwise interfere with measurements. Thus, the entire mounting structure provides a free space surrounding the distal part of the sensor element 14, this free space allowing air or blood or other e.g. pressure exerting media to enter the interior and to act on the sensor, which in its turn delivers a signal representative of the exerted pressure, the flow, and/or the temperature.
The length of the cantilevered portion 25 of the sensor element 14 (see FIG. 4) is between 0.1 to 2 mm, and preferably between 0.2 to 0.8 mm. The cantilevered portion 25 of the sensor element 14 is the part from where the first core wire part 19 of the core wire is ended to the distal end of the sensor element 14. As also shown in FIG. 4, the proximal end of the sensor element 14 in this embodiment protrudes proximally from the jacket 13. This embodiment facilitates the mounting of the hollow tube 12, since the hollow tube 12 (see FIG. 3) then may be threaded onto the proximal end of the sensor element 14, when being attached to the jacket 13.
FIG. 5 illustrates the sensor guide wire 17 according to the present invention, where the coil 16 and the hollow tube 12 have been omitted in order to be able to clearly illustrate the present invention. The distal end 21 of said first core wire part 19 is attached to said jacket 13 proximally said sensor portion 15, and the proximal end 22 of said second core wire part 20 is attached to said jacket 13 distally to said sensor portion 15. The jacket 13 thereby connects the proximal region 8 of the sensor guide wire 17 and the tip region 10.
As discussed above, by using the jacket 13 to connect the proximal region 8 and the tip region 10 has several advantages, for example, the sensor guide wire becomes less expensive to manufacture and quicker to assemble, and in addition it reduces the potential risk that bending artefacts of the core wire may influence the measurements.
In FIG. 6, a side view of the first and second core wire parts (19, 20) attached to the jacket 13, is disclosed.
In a preferred embodiment of the present invention, said distal and proximal ends (21, 22) of said first and second core wire parts (19, 20) are attached to said jacket 13 by means of welding.
According to another preferred embodiment of the present invention, said distal and proximal ends (21, 22) of said first and second core wire parts (19, 20) are attached to said jacket 13 by means of soldering.
According to yet another preferred embodiment of the present invention, said distal and proximal ends (21, 22) of said first and second core wire parts (19, 20) are attached to said jacket 13 by means of gluing. However, other suitable techniques may also be used in order attach the proximal and distal ends (21, 22) to the jacket 13. For example, the jacket 13 may be provided with a plurality of throughgoing holes, through which said distal and proximal ends (21, 22) of said first and second core wire parts (19, 20) and said jacket 13 is welded or soldered together.
FIG. 7, which illustrates a cross section in the longitudinal direction of the sensor guide wire, shows that the distal end 21 of said first core wire part 19 may partly be inserted into the jacket 13 and fastened to the inner side 24 of the jacket 13. The cross-sectional dimension of the distal end 21 is in this embodiment less than the inner diameter of the jacket 13 in order to give space for the sensor element 14.
As illustrated in FIGS. 8 and 10, the outer diameter of said proximal end 22 of said second core wire part 20 is adapted to the inner diameter of the jacket 13, so that the proximal end may partly be inserted into the jacket 13 and attached to the inner side 24 of the jacket 13 by welding, gluing or any other suitable technique. Alternatively, or in combination with welding, soldering, or gluing, said proximal end 22 may be attached to said jacket 13 by frictional engagement when inserted into said jacket 13.
As illustrated in FIG. 9, according to a preferred embodiment of the present invention, which shows a cross-section A-A of the sensor region 9 of the sensor guide wire 17 shown in FIG. 6, the jacket 13 is hollow and cylindrical and has a circular cross-section. The distal end 21 of said first core wire part 19 is attached to the inner side 24 of the hollow jacket 13 and the sensor element 14 is attached to the first core wire part 19, as may also be seen in FIG. 10.
19. Sensor guide wire for intravascular measurements of physiological variables in a living body, which sensor guide wire has a proximal region, a distal sensor region and a tip region, the sensor guide wire comprises:
a core wire member;
a sensor element, which has a sensor portion for measuring the physiological variable and to generate a sensor signal in response to said variable;
a jacket, which is cylindrical and has a circular cross-section, accommodating at least a part of said sensor element;
wherein said core wire member comprises two spatially separated parts, a first core wire part and a second core wire part,
characterized in that a distal end of said first core wire part is attached to said jacket proximally said sensor portion and a proximal end of said second core wire part is attached to said jacket distally to said sensor portion, and that said first core wire part extends at least partially along the proximal region, and wherein said distal end of said first core wire part is ended proximally said sensor portion, and that said second core wire part extends at least partially along the tip region, and wherein said proximal end of said second core wire part is ended distally to said sensor portion, and that an outer diameter of said proximal end of said second core wire part is adapted to an inner diameter of said jacket, and that said proximal end is partly inserted into said jacket and attached to an inner side of said jacket.
20. Sensor guide wire according to claim 19, wherein no core wire member is provided in the longitudinal section of the sensor guide wire where said sensor portion is arranged.
21. Sensor guide wire according to claim 19, wherein said sensor portion is sensitive to one or many of the physiological variables, pressure, temperature, and flow.
22. Sensor guide wire according to claim 19, wherein said sensor element is provided with a cantilevered portion.
23. Sensor guide wire according to claim 22, wherein said cantilevered portion is between 0.1 to 2 mm, and preferably between 0.2 to 0.8 mm.
24. Sensor guide wire according to claim 19, wherein said jacket is hollow.
25. Sensor guide wire according to claim 19, wherein a cross-sectional dimension of said distal end is less than an inner diameter of said jacket.
26. Sensor guide wire according to claim 19, wherein said distal end of said first core wire part is partly inserted into said jacket and attached to an inner side of said jacket.
27. Sensor guide wire according to claim 19, wherein a cross-sectional dimension of said proximal end is less than said inner diameter of said jacket.
28. Sensor guide wire according to claim 19, wherein said jacket is provided with an aperture in said sensor region, in the longitudinal section of the sensor guide wire where said sensor portion is arranged.
29. Sensor guide wire according to claim 19, wherein said distal and proximal ends of said first and second core wire parts are attached to said jacket by means of welding.
30. Sensor guide wire according to claim 19, wherein said distal and proximal ends of said first and second core wire parts are attached to said jacket by means of gluing.
31. Sensor guide wire according to claim 19, wherein said sensor element is attached to said first core wire part.
32. Sensor guide wire according to claim 19, wherein at least one signal transmitting microcable is connected to said sensor element, and running along the sensor guide wire.
US13/262,132 2009-03-31 2010-03-30 Sensor guide wire Pending US20120265079A1 (en)
US20274309P true 2009-03-31 2009-03-31
PCT/EP2010/054242 WO2011120565A1 (en) 2009-03-31 2010-03-30 Sensor guide wire
US13/262,132 US20120265079A1 (en) 2009-03-31 2010-03-30 Sensor guide wire
US20120265079A1 true US20120265079A1 (en) 2012-10-18
ID=42144857
US13/262,132 Pending US20120265079A1 (en) 2009-03-31 2010-03-30 Sensor guide wire
US (1) US20120265079A1 (en)
EP (1) EP2413787B1 (en)
JP (1) JP5676564B2 (en)
AU (1) AU2010350050B2 (en)
CR (1) CR20110568A (en)
WO (1) WO2011120565A1 (en)
2010-03-30 AU AU2010350050A patent/AU2010350050B2/en active Active
2010-03-30 US US13/262,132 patent/US20120265079A1/en active Pending
2010-03-30 WO PCT/EP2010/054242 patent/WO2011120565A1/en active Application Filing
2010-03-30 EP EP10712933.0A patent/EP2413787B1/en active Active
2010-03-30 JP JP2012507663A patent/JP5676564B2/en active Active
2011-10-31 CR CR20110568A patent/CR20110568A/en unknown
JP5676564B2 (en) 2015-02-25
AU2010350050A1 (en) 2011-11-10
WO2011120565A1 (en) 2011-10-06
JP2012521865A (en) 2012-09-20
EP2413787A1 (en) 2012-02-08
EP2413787B1 (en) 2017-07-26
CR20110568A (en) 2012-03-12
AU2010350050B2 (en) 2014-06-26
USRE35648E (en) 1997-11-04 Sensor guide construction and use thereof
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HILMERSSON, MATS;REEL/FRAME:027094/0683