US20050215859A1 - Endoscopic imaging system including removable deflection device - Google Patents
Endoscopic imaging system including removable deflection device Download PDFInfo
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- US20050215859A1 US20050215859A1 US11/132,464 US13246405A US2005215859A1 US 20050215859 A1 US20050215859 A1 US 20050215859A1 US 13246405 A US13246405 A US 13246405A US 2005215859 A1 US2005215859 A1 US 2005215859A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/005—Flexible endoscopes
- A61B1/0051—Flexible endoscopes with controlled bending of insertion part
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00105—Constructional details of the endoscope body characterised by modular construction
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/0607—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements for annular illumination
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/0661—Endoscope light sources
- A61B1/0684—Endoscope light sources using light emitting diodes [LED]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/005—Flexible endoscopes
- A61B1/0051—Flexible endoscopes with controlled bending of insertion part
- A61B1/0055—Constructional details of insertion parts, e.g. vertebral elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/0638—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements providing two or more wavelengths
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/0661—Endoscope light sources
- A61B1/0676—Endoscope light sources at distal tip of an endoscope
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Biophysics (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Radiology & Medical Imaging (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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- Microelectronics & Electronic Packaging (AREA)
- Endoscopes (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
Abstract
A steerable endoscopic sheath has a proximal end, a distal end and a working channel lumen disposed therein. A plurality of solid state light emitting devices such as light emitting diodes are positioned near the distal end of the sheath and are selectively energized to illuminate internal body tissues. An imaging device such as a photo diode or CCD array creates an image from light reflected from the tissue. The distal tip of the endoscopic sheath is selectively moveable with a deflection device that is insertable into the sheath. The deflection device includes a tip deflection mechanism that allows a user to move the tip of the deflection device. With the deflection device inserted in the sheath, movement of the distal tip causes a corresponding movement in the distal tip of the sheath. The distal tip of the sheath has a shape retaining mechanism that allows it to retain the shape imparted by the deflection device once the deflection device is removed from the sheath.
Description
- This application is a continuation of U.S. application Ser. No. 10/291,889, filed Nov. 8, 2002, entitled ENDOSCOPIC IMAGING SYSTEM INCLUDING REMOVABLE DEFLECTION DEVICE, the disclosure of which is hereby expressly incorporated by reference and the priority from the filing date of which is hereby claimed under 35 U.S.C. § 120.
- The present invention relates to medical devices and in particular to imaging endoscopes.
- Most minimally invasive surgical procedures performed in the GI tract or other internal body cavities are accomplished with the aid of an endoscope. A typical endoscope has an illumination channel and an imaging channel both of which are made of a bundle of optical fibers. The illumination channel is coupled to a light source to illuminate an internal body cavity of a patient and the imaging channel transmits an image created by a lens at the distal end of the scope to a connected camera unit or display device. Most endoscopes also have a working channel through which an elongated treatment/surgical device may be passed. The treatment device usually has a handle or control at its proximal end that is manipulated by a physician to perform some surgical procedure.
- While endoscopes are a proven technology, most are generally costly to manufacture. In addition, the optical fibers in the endoscope are subject to breakage during handling or sterilization procedures and are costly to repair. In order to limit breakage of the optical fibers, most endoscopes are relatively stiff. Such stiffness is usually achieved by making the working channel relatively small compared to the diameter of the scope. However, a small working channel limits the size of the medical device that can be inserted into the channel. Alternatively, if the working channel is made larger, the thickness of the endoscope is increased, thereby reducing the number of locations to which the scope can be routed.
- Given these shortcomings, there is a need for an endoscope that does not rely on optical fibers for transmitting light into or images out of a body cavity. In addition, the endoscope should be able to be made with a relatively small diameter without unduly narrowing the size of the working channel.
- To address these and other concerns, the present invention is an endoscopic sheath having a flexible illumination and imaging mechanism. The illumination mechanism preferably includes a number of solid state light emitters such as light emitting diodes to illuminate a body cavity. The imaging mechanism includes a photo-detector or solid state camera chip, positioned at the distal end of the sheath, that produces an image of the tissue in the body cavity.
- The endoscopic sheath has a distal end that is selectively positionable in the cavity by a removable deflection device. In one embodiment, the deflection device is a catheter having a steering mechanism such as one or more steering wires that extend along its length. The deflection device is inserted into the endoscopic sheath and the steering mechanism adjusted to move its distal tip. Movement of the tip of the deflection device creates a corresponding movement at the distal end of the endoscopic sheath. In one embodiment, the distal end of the endoscopic sheath has a shape retaining mechanism that maintains its desired position when the deflection device is removed.
- The foregoing aspects and many of the attendant advantages of this invention will become more readily appreciated as the same become better understood by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein:
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FIG. 1 shows an endoscopic imaging system in accordance with one embodiment of the present invention; -
FIG. 2 illustrates one embodiment of an endoscopic sheath in accordance with the present invention; -
FIG. 3 illustrates one embodiment of a deflection device for positioning the endoscopic sheath; -
FIG. 4 illustrates a number of lumens in the endoscopic sheath; -
FIG. 5 illustrates the deflection device within the endoscopic sheath; and -
FIGS. 6 and 7 illustrate different embodiments of a shape retaining mechanism in the endoscopic sheath. - An
endoscopic imaging system 10, in accordance with one embodiment of the present invention includes anendoscopic sheath 12 that emits light from itsdistal end 14 onto a tissue sample of interest. Light reflected from the tissue is received by animaging device 16 at the distal end of theendoscopic sheath 12. Signals from theimaging device 16 are received by a computer andimage processor 20 that is coupled to theendoscopic sheath 12. The computer andimage processor 20 produces an image of the tissue that is shown to a physician on adisplay terminal 22. - As will be explained in further detail below, the
distal end 14 of the endoscopic sheath may be oriented in a desired direction by adeflection device 70 that fits within a lumen of theendoscopic sheath 12. Thedeflection device 70 includes a steering mechanism, such as a number of pull wires or the like, that allow adistal end 62 of thedeflection device 70 to be manipulated in a desired direction. Once thedistal end 14 of theendoscopic sheath 12 has been positioned in the desired direction, thedeflection device 70 is removed from the lumen in theendoscopic sheath 12. Thedistal end 14 of thesheath 12 has a shape retaining mechanism that retains its position even with thedeflection device 70 removed. -
FIG. 2 shows theendoscopic sheath 12 in accordance with one embodiment of the present invention in greater detail. Thesheath 12 comprises an elongated tube having aproximal end 28, adistal region 30 that terminates at thedistal end 14, and at least one lumen extending from the proximal end to the distal end that defines a workingchannel 36. Disposed at thedistal end 14 of theendoscopic sheath 12 are a number of solidstate light sources 38 such as light emitting diodes (LED's). Each LED includes a pair of flexible wires (not shown) that terminate at aconnector 40 at theproximal end 28 of theendoscopic sheath 12. Thelight sources 38 may be clear LED's or colored LED's such as red, green and blue. White light images can be created by illuminating the clear LED's and recording an image. Alternatively, red, green and blue images can be created by sequential illumination of the tissue with the red, green and blue LED's and combining the colored images in the computer andimage processor 20 or on thedisplay 22. Light reflected from the internal body cavity is received by theimaging device 16 such as a photo-diode, solid state camera including a CCD array or other image sensor. Electronic signals representative of the illuminated tissue are carried to the computer andimage processor 20 shown inFIG. 1 via wires that terminate at theconnector 40 at theproximal end 28 of the endoscope. Aflushing port 42 at the proximal end of the endoscopic sheath allows liquids to be delivered through the sheath in order to clear theimage sensor 16 and generally flush the workingchannel 36. -
FIG. 4 shows thedistal tip 14 of theendoscopic sheath 12. The tip has a number of solidstate light sources 38 disposed about the workingchannel 36. In addition, the sheath may include a flushingport lumen 52 through which saline or other liquids/gasses can be delivered. Theflushing port lumen 52 may be designed such that a portion of the liquid/gas delivered clears the surface of theimaging device 16. - The
distal region 30 of theendoscopic sheath 12 has a flexibility that is generally more flexible than theproximal end 28. The proximal end may have abraid 34 or other stiffening member embedded within the walls of the sheath. The stiffening member does not extend all the way to thedistal region 30 of the sheath and therefore thedistal region 30 is more flexible than the proximal end. -
FIG. 3 shows one embodiment of adeflection device 70 that is inserted within a lumen of theendoscopic sheath 12 in order to position the distal tip of the sheath in the desired direction. In one embodiment of the invention, the deflection device is inserted into the workingchannel 36. However, other lumens could be provided in the endoscopic sheath specifically for receiving the deflection device. Thedeflection device 70 comprises anelongate catheter 72 having aflexible tip 74 that includes a steering mechanism such as a number of pull wires (not shown) to direct theflexible tip 74. Each pull wire is preferably positioned along an edge of thecatheter 72 and has a proximal end secured to awheel 80 within a handle at the proximal end of the deflection device. By rotating thewheel 80, two opposing pull wires are simultaneously compressed and extended on either side of the catheter thereby bending thedistal tip 74 in a desired direction within a plane. In addition, thewheel 80 can be moved within aslot 82 within the handle in order to compress and extend another pair of pull wires, so that the tip moves back and forth in another plane. Although the present embodiment of the invention uses pull wires as a steering mechanism, it will be appreciated that other techniques such as fluid/air inflatable bladders, magnetic forces, electromechanical actuators, etc. could be used to bend the tip of thedeflection device 70 in the desired direction. - In one embodiment, the
distal tip 74 of thedeflection device 70 is more flexible than a proximal region of thecatheter 72 thereby restricting the effect of the steering mechanism to thedistal tip 74. Upon the insertion of thedeflection device 70 within the workingchannel 36 of theendoscopic sheath 12, as shown inFIG. 5 , movement of thedistal tip 74 causes a corresponding movement in thedistal tip 14 of the endoscopic sheath. Once thedistal tip 14 of the sheath is oriented in the desired direction, thedeflection device 70 is withdrawn from the lumen and thedistal tip 14 of the sheath retains its desired position so that the physician can access and view a desired region of the patient's body. - As indicated above, the
distal region 30 of theendoscopic sheath 12 has a shape retaining mechanism that is flexible enough to be moved by thedeflection device 70 and allows thedistal tip 14 of the endoscopic sheath to retain its shape once the deflection device is removed from the workingchannel 36. - The shape retaining mechanism can be made by selecting shape retaining materials for the manufacture of the
distal region 30 of the sheath. Alternatively, shape retaining mechanisms such aswires 76 can be embedded within thedistal region 30 as shown inFIG. 6 . Thewires 76 are bent by thedeflection device 70, but retain their shape when thedeflection device 70 is removed. Alternatively, abraided stent 78 with a shape retaining ability can be incorporated into thedistal region 30 of the sheath as shown inFIG. 7 to maintain its shape once thedeflection device 70 is removed. - By allowing the
endoscopic sheath 12 to be oriented in a desired direction with a removable deflection device, thesheath 12 can be made thinner than conventional endoscopes because no steering wires need be incorporated into the device. In addition, the size of the working channel can be increased relative to the size of the sheath because the sheath doesn't need to be as stiff in order to prevent breakage of optical fibers. - While the preferred embodiment of the invention has been illustrated and described, it will be appreciated that various changes can be made therein without departing from the scope of the invention. Therefore, the scope of the invention is to be determined from the following claims and equivalents thereof.
Claims (14)
1. An imaging endoscope, comprising:
an endoscopic sheath having a proximal end, a distal end and a working channel disposed therein that extends from the proximal end to the distal end;
at least one solid state light source disposed at the distal end of the sheath to illuminate internal body tissues;
an image sensor disposed at the distal end of the sheath;
a deflection device for selectively positioning the distal end of the sheath, the deflection device including:
an elongate shaft having a proximal and a distal end and a steering mechanism for moving the distal end;
wherein the elongate shaft fits within the working channel of the endoscope and engages the distal end of the sheath such that when the distal end of the deflection device is moved, the distal end of the sheath is also moved.
2. The imaging endoscope of claim 1 , wherein the steering mechanism in the deflection device includes one or more pull wires.
3. The imaging endoscope of claim 1 , wherein the distal end of the endoscopic sheath is more flexible than the proximal end.
4. The imaging endoscope of claim 3 , wherein the proximal end of the endoscopic sheath includes a reinforcing braid.
5. The imaging endoscope of claim 1 , wherein the image sensor includes a photo-detector.
6. The imaging endoscope of claim 1 , wherein the image sensor includes a CCD array.
7. The imaging endoscope of claim 1 , wherein the distal end of the endoscopic sheath has a shape retaining mechanism.
8. The imaging endoscope of claim 7 , wherein the shape retaining mechanism is a bendable metallic member.
9. A system for imaging internal body tissue, comprising:
a disposable endoscopic sheath having a proximal end, a distal end, a working channel extending from the proximal end to the distal end, a number of light emitting diodes at the distal end that are selectively activated to illuminate the body tissue and an image sensor for producing an image of the body tissue; and
a deflection catheter having a proximal end, a distal end and one or more pull wires that move the distal end, the deflection catheter being selectively inserted into the working channel of the sheath to move the distal tip of the endoscope.
10. The system of claim 9 , wherein the sheath includes a shape retaining mechanism at its distal end.
11. A disposable imaging endoscope, comprising:
an endoscopic sheath having a proximal end, a distal end and at least one lumen extending from the proximal end to the distal end;
a plurality of light emitting diodes at the distal end of the sheath that are selectively activated to illuminate internal body tissue;
an image sensor disposed at the distal end of the sheath that transmits electrical signals representative of an image of a tissue sample;
the distal end of the sheath further including a shape retaining mechanism that is movable by a deflection device that is insertable into the lumen, said shape retaining mechanism retaining the shape of the distal end of the sheath after the deflection device is removed from the lumen.
12. The disposable imaging endoscope of claim 11 , wherein the shape retaining mechanism includes one or more wires disposed adjacent the distal tip of the sheath.
13. The disposable imaging endoscope of claim 11 , wherein the shape retaining mechanism is a flexible stent adjacent the distal end of the sheath.
14. A method of capturing images from an internal body cavity of a patient, comprising:
inserting an endoscope into the patient, the endoscope having a proximal end, a distal end, a working channel, a plurality of light emitting diodes that produce light at the distal end of the endoscope and an image sensor for producing an image of the internal body cavity;
selectively positioning the distal end of the endoscope by inserting a deflection catheter into the endoscope and moving a distal tip of the deflection catheter to move the distal end of the endoscope; and
withdrawing the deflection catheter from the endoscope.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/132,464 US20050215859A1 (en) | 2002-11-08 | 2005-05-18 | Endoscopic imaging system including removable deflection device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/291,889 US6899672B2 (en) | 2002-11-08 | 2002-11-08 | Endoscopic imaging system including removable deflection device |
US11/132,464 US20050215859A1 (en) | 2002-11-08 | 2005-05-18 | Endoscopic imaging system including removable deflection device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/291,889 Continuation US6899672B2 (en) | 2002-11-08 | 2002-11-08 | Endoscopic imaging system including removable deflection device |
Publications (1)
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US20050215859A1 true US20050215859A1 (en) | 2005-09-29 |
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US10/291,889 Expired - Lifetime US6899672B2 (en) | 2002-11-08 | 2002-11-08 | Endoscopic imaging system including removable deflection device |
US11/132,464 Abandoned US20050215859A1 (en) | 2002-11-08 | 2005-05-18 | Endoscopic imaging system including removable deflection device |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US10/291,889 Expired - Lifetime US6899672B2 (en) | 2002-11-08 | 2002-11-08 | Endoscopic imaging system including removable deflection device |
Country Status (7)
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US (2) | US6899672B2 (en) |
EP (1) | EP1558124B1 (en) |
JP (1) | JP4691361B2 (en) |
AU (1) | AU2003288940B2 (en) |
CA (1) | CA2503265C (en) |
DE (1) | DE60326480D1 (en) |
WO (1) | WO2004043242A1 (en) |
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US20050256375A1 (en) * | 2004-05-13 | 2005-11-17 | Scimed Life Systems, Inc. | Handle for steerable catheter |
US20050283048A1 (en) * | 2001-10-19 | 2005-12-22 | Visionscope, Llc | Portable imaging system employing a miniature endoscope |
US20070167681A1 (en) * | 2001-10-19 | 2007-07-19 | Gill Thomas J | Portable imaging system employing a miniature endoscope |
US20080064925A1 (en) * | 2001-10-19 | 2008-03-13 | Gill Thomas J | Portable imaging system employing a miniature endoscope |
US20100256446A1 (en) * | 2007-05-11 | 2010-10-07 | Board Of Regents, The University Of Texas System | Medical scope carrier and scope as system and method |
US7942814B2 (en) | 2001-10-19 | 2011-05-17 | Visionscope Technologies Llc | Miniature endoscope with imaging fiber system |
US20110134293A1 (en) * | 2008-08-19 | 2011-06-09 | Rohm Co., Tld | Camera |
US20120057010A1 (en) * | 2010-09-08 | 2012-03-08 | Olympus Corporation | Endoscope apparatus |
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US9307893B2 (en) | 2011-12-29 | 2016-04-12 | Cook Medical Technologies Llc | Space-optimized visualization catheter with camera train holder in a catheter with off-centered lumens |
CN106714653A (en) * | 2015-08-20 | 2017-05-24 | 奥林巴斯株式会社 | Medical sheath and medical device |
US9668643B2 (en) | 2011-12-29 | 2017-06-06 | Cook Medical Technologies Llc | Space-optimized visualization catheter with oblong shape |
US10244927B2 (en) | 2011-12-29 | 2019-04-02 | Cook Medical Technologies Llc | Space-optimized visualization catheter with camera train holder |
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Also Published As
Publication number | Publication date |
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EP1558124A1 (en) | 2005-08-03 |
JP2006505348A (en) | 2006-02-16 |
WO2004043242A1 (en) | 2004-05-27 |
JP4691361B2 (en) | 2011-06-01 |
EP1558124B1 (en) | 2009-03-04 |
US20040092794A1 (en) | 2004-05-13 |
AU2003288940A1 (en) | 2004-06-03 |
DE60326480D1 (en) | 2009-04-16 |
AU2003288940B2 (en) | 2008-06-26 |
CA2503265A1 (en) | 2004-05-27 |
US6899672B2 (en) | 2005-05-31 |
CA2503265C (en) | 2008-07-08 |
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