|Número de publicación||US20050215859 A1|
|Tipo de publicación||Solicitud|
|Número de solicitud||US 11/132,464|
|Fecha de publicación||29 Sep 2005|
|Fecha de presentación||18 May 2005|
|Fecha de prioridad||8 Nov 2002|
|También publicado como||CA2503265A1, CA2503265C, DE60326480D1, EP1558124A1, EP1558124B1, US6899672, US20040092794, WO2004043242A1|
|Número de publicación||11132464, 132464, US 2005/0215859 A1, US 2005/215859 A1, US 20050215859 A1, US 20050215859A1, US 2005215859 A1, US 2005215859A1, US-A1-20050215859, US-A1-2005215859, US2005/0215859A1, US2005/215859A1, US20050215859 A1, US20050215859A1, US2005215859 A1, US2005215859A1|
|Inventores||Yem Chin, Louis Barbato, Michael Banik|
|Cesionario original||Scimed Life Systems, Inc.|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citas de patentes (21), Citada por (10), Clasificaciones (22), Eventos legales (2)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
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:
An endoscopic imaging system 10, in accordance with one embodiment of the present invention includes an endoscopic sheath 12 that emits light from its distal end 14 onto a tissue sample of interest. Light reflected from the tissue is received by an imaging device 16 at the distal end of the endoscopic sheath 12. Signals from the imaging device 16 are received by a computer and image processor 20 that is coupled to the endoscopic sheath 12. The computer and image processor 20 produces an image of the tissue that is shown to a physician on a display 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 a deflection device 70 that fits within a lumen of the endoscopic sheath 12. The deflection device 70 includes a steering mechanism, such as a number of pull wires or the like, that allow a distal end 62 of the deflection device 70 to be manipulated in a desired direction. Once the distal end 14 of the endoscopic sheath 12 has been positioned in the desired direction, the deflection device 70 is removed from the lumen in the endoscopic sheath 12. The distal end 14 of the sheath 12 has a shape retaining mechanism that retains its position even with the deflection device 70 removed.
The distal region 30 of the endoscopic sheath 12 has a flexibility that is generally more flexible than the proximal end 28. The proximal end may have a braid 34 or other stiffening member embedded within the walls of the sheath. The stiffening member does not extend all the way to the distal region 30 of the sheath and therefore the distal region 30 is more flexible than the proximal end.
In one embodiment, the distal tip 74 of the deflection device 70 is more flexible than a proximal region of the catheter 72 thereby restricting the effect of the steering mechanism to the distal tip 74. Upon the insertion of the deflection device 70 within the working channel 36 of the endoscopic sheath 12, as shown in
As indicated above, the distal region 30 of the endoscopic sheath 12 has a shape retaining mechanism that is flexible enough to be moved by the deflection device 70 and allows the distal tip 14 of the endoscopic sheath to retain its shape once the deflection device is removed from the working channel 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 as wires 76 can be embedded within the distal region 30 as shown in
By allowing the endoscopic sheath 12 to be oriented in a desired direction with a removable deflection device, the sheath 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.
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|Clasificación de EE.UU.||600/146, 600/179|
|Clasificación internacional||A61B1/012, A61B1/005, A61B1/04|
|Clasificación cooperativa||A61B1/0676, A61B1/00105, A61B1/0638, A61B1/012, A61B1/0607, A61B1/0055, A61B1/00071, A61B1/06, A61B1/0684, A61B1/0051|
|Clasificación europea||A61B1/005B, A61B1/06, A61B1/06R6, A61B1/06B, A61B1/06R4, A61B1/00E6, A61B1/00E4|
|4 Jun 2007||AS||Assignment|
Owner name: SCIMED LIFE SYSTEMS, INC., MINNESOTA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHIN, YEM;BARBATO, LOUIS J.;BANIK, MICHAEL S.;REEL/FRAME:019379/0404
Effective date: 20021025
|13 Abr 2010||AS||Assignment|
Owner name: BOSTON SCIENTIFIC SCIMED, INC.,MINNESOTA
Free format text: CHANGE OF NAME;ASSIGNOR:SCIMED LIFE SYSTEMS, INC.;REEL/FRAME:024223/0563
Effective date: 20041222