US20180200012A1 - Extendable articulated probe device - Google Patents
Extendable articulated probe device Download PDFInfo
- Publication number
- US20180200012A1 US20180200012A1 US15/918,287 US201815918287A US2018200012A1 US 20180200012 A1 US20180200012 A1 US 20180200012A1 US 201815918287 A US201815918287 A US 201815918287A US 2018200012 A1 US2018200012 A1 US 2018200012A1
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- Prior art keywords
- overtube
- link
- linked
- steering
- holes
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-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/30—Surgical robots
-
- 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
- A61B1/005—Flexible endoscopes
- A61B1/0051—Flexible endoscopes with controlled bending of insertion part
- A61B1/0057—Constructional details of force transmission elements, e.g. control wires
-
- 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
- A61B1/008—Articulations
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/70—Manipulators specially adapted for use in surgery
- A61B34/71—Manipulators operated by drive cable mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/06—Programme-controlled manipulators characterised by multi-articulated arms
- B25J9/065—Snake robots
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/10—Programme-controlled manipulators characterised by positioning means for manipulator elements
- B25J9/104—Programme-controlled manipulators characterised by positioning means for manipulator elements with cables, chains or ribbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/10—Programme-controlled manipulators characterised by positioning means for manipulator elements
- B25J9/105—Programme-controlled manipulators characterised by positioning means for manipulator elements using eccentric means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00292—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
- A61B2017/003—Steerable
- A61B2017/00305—Constructional details of the flexible means
- A61B2017/00314—Separate linked members
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00292—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
- A61B2017/003—Steerable
- A61B2017/00318—Steering mechanisms
- A61B2017/00323—Cables or rods
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/30—Surgical robots
- A61B2034/301—Surgical robots for introducing or steering flexible instruments inserted into the body, e.g. catheters or endoscopes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/30—Surgical robots
- A61B2034/305—Details of wrist mechanisms at distal ends of robotic arms
- A61B2034/306—Wrists with multiple vertebrae
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/70—Manipulators specially adapted for use in surgery
- A61B34/71—Manipulators operated by drive cable mechanisms
- A61B2034/715—Cable tensioning mechanisms for removing slack
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/70—Manipulators specially adapted for use in surgery
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S901/00—Robots
- Y10S901/19—Drive system for arm
- Y10S901/21—Flaccid drive element
Definitions
- This application discloses an invention that is related, generally and in various embodiments, to a multi-linked robotic device, a continuum robot, or other highly articulated device.
- This device may be used to deliver a tool such as a camera, probe, scalpel or other tool to an area of interest inside a patient's body during a surgical procedure.
- a tool such as a camera, probe, scalpel or other tool
- a minimally complex articulated device is usually sufficient.
- a longer device may be necessary.
- a longer mechanism may require extra support along at least a portion of its length to counteract any increased loading.
- the device may need to accommodate additional tools needed to perform certain parts of a more complex procedure.
- the embodiments disclose an articulated probe device.
- the articulate probe device includes a first mechanism, a second mechanism, and at least one overtube mechanism.
- the first mechanism includes a first link positioned at a proximal area of the first mechanism, a plurality of intermediate links, wherein a first one of the intermediate links is moveably coupled to the first link, and a second link positioned at a distal area of the second mechanism which is moveably coupled to a second one of the intermediate links.
- the second mechanism includes a first link positioned at a proximal area of the second mechanism, a plurality of intermediate links, wherein a first one of the intermediate links is moveably coupled to the first link, and a second link positioned at a distal area of the second mechanism and which is moveably coupled to a second one of the intermediate links.
- the at least one overtube includes a first link positioned at a proximal area of the overtube mechanism, a plurality of intermediate links, wherein a first one of the intermediate links is moveably coupled to the first link, and a second link which is moveably coupled to a second one of the intermediate links and positioned at a proximal area of the overtube mechanism. Further, at least one of the first mechanism, second mechanism, and overtube mechanism is configured to be steerable and extendable beyond the other mechanisms.
- FIGS. 1 and 2 illustrate various embodiments of a steerable multi-linked device.
- FIG. 3 illustrates various embodiments of a core mechanism of the device of FIG. 1 .
- FIGS. 4 and 5 illustrate various embodiments of an intermediate link of the core mechanism.
- FIG. 6 illustrates various embodiments of a motion sequence of the device of FIG. 1 .
- FIG. 7 illustrates an exemplary cross-section of an overtube according to an embodiment.
- FIG. 8 illustrates an exemplary steerable multi-linked device having an overtube according to an embodiment.
- FIGS. 9A-9C illustrates exemplary cross-sections of a steerable multi-linked device having an overtube according to an embodiment.
- FIG. 10 illustrates exemplary steerable multi-linked devices having an overtube according to an embodiment.
- FIG. 11 illustrates an exemplary cross-section of a steerable multi-linked device according to an embodiment.
- FIG. 12 illustrates an exemplary tensioning cables and splice according to an embodiment.
- FIG. 13A-13J illustrate exemplary port and through-hole configurations are according to an embodiment.
- the invention described herein may be utilized to control movement of an articulated device, which in the figures and description herein is described as a steerable multi-linked device.
- a surgical probe may be an exemplary articulated device.
- a surgical probe may be used to perform surgical procedures, exploratory procedures and/or the like on humans and/or animals.
- the invention will be described in the context of its use with various embodiments of the steerable multi-linked device described herein.
- the invention may be utilized with other types of multi-linked devices as well as other types of devices such as, but not limited to, endoscopes, highly articulated devices and/or the like.
- FIG. 1 illustrates a representative embodiment of a highly articulated extendible probe device 10 .
- the device may be a steerable multi-linked device such as a snake-like robot, a continuum robot or the like.
- Various embodiments of the device 10 may be utilized for medical procedures (e.g., as a robotic bore, positioning device, ablation tool, camera or instrument support, or guidance system for minimally invasive procedures), for surveillance applications, for inspection applications, for search and rescue applications, etc.
- medical procedures e.g., as a robotic bore, positioning device, ablation tool, camera or instrument support, or guidance system for minimally invasive procedures
- surveillance applications for inspection applications, for search and rescue applications, etc.
- search and rescue applications etc.
- the utility of the device 10 will be described hereinbelow in the context of its applicability to medical procedures.
- the device 10 can be utilized in a variety of different applications.
- the device 10 comprises a first mechanism 12 and a second mechanism 14 .
- a mechanism may be a series of articulated links, a snake-like robot, a continuum robot or the like.
- the second mechanism 14 is structured and arranged to receive and surround the first mechanism 12 as shown in FIG. 2 .
- the first mechanism and second mechanism may be concentric.
- the first and second mechanisms 12 , 14 may be structured and arranged to have a relationship other than a concentric relationship.
- the second mechanism 14 may surround the first mechanism 12 , however, the first mechanism 12 may be arranged eccentrically with respect to the second mechanism 14 .
- the first and second mechanisms 12 , 14 may be structured and arranged to operate in a side-by-side arrangement, where the first mechanism 12 operates alongside the second mechanism 14 .
- additional and/or alternate configurations may be used within the scope of this disclosure.
- a gap or three-dimensional space 240 may be provided between the first and second mechanisms. This space will be described in more detail below.
- the first mechanism 12 may operate in either a rigid mode or a limp mode
- the second mechanism 14 may operate in either a rigid mode or a limp mode
- the first and second mechanisms 12 , 14 may operate independent of one another. At least one of the mechanism is rigid at all times during operation of the device 10 .
- Both the first mechanism 12 and the second mechanism 14 may be steerable mechanisms. Accordingly, it will be appreciated that the device 10 may be utilized to navigate a luminal space as well as any path within a three-dimensional intracavity space, void, or an otherwise unconstrained three dimensional volume. According to the representative embodiment, the device 10 may advance by alternating the operation of the first mechanism 12 and the second mechanism 14 between a limp mode and a rigid mode. Further, both mechanisms can both exist in the rigid mode at the same time.
- the device 10 may also comprise one or more cables.
- one or more of the cables 10 may be steering cables and/or tensioning cables.
- the device 10 may include three cables for steering disposed through the second mechanism and one cable for tensioning which is disposed through the first mechanism.
- the device 10 may include four steering cables. More, fewer, alternative and/or additional cables may be used within the scope of this disclosure.
- FIG. 3 illustrates various embodiments of either mechanism of the device. Shown in FIG. 3 is the first mechanism 12 of the device 10 .
- the first mechanism 12 is a multi-linked mechanism and includes a first end 24 and a second end 26 .
- the first end 24 may be considered the proximal end and the second end 26 may be considered the distal end.
- the first mechanism 12 may comprise a first link 28 , a second link 30 , and one or more intermediate links 32 between the first and second links 28 , 30 .
- the first link 28 may be considered the proximal link, and the second link 30 may be considered the distal link. Any link between the proximal link 28 and distal link 30 may be considered an intermediate link 32 .
- Exemplar link structures are shown in, for example, U.S. Patent Application Publication No. 200810039690.
- FIGS. 4 and 5 illustrate various views of an exemplary intermediate link 32 of the first mechanism 12 in an embodiment where the inner mechanism serves as the core.
- the intermediate link 32 is representative of the other intermediate links 32 .
- the intermediate link 32 includes a first end 58 and a second end 60 , and defines a longitudinal axis 62 that passes through the center of the first end 58 and the center of the second end 60 .
- Link 32 includes a passage 76 or through-hole which may be positioned along the longitudinal axis, or it may be positioned elsewhere in the link parallel to, or substantially parallel to, the longitudinal axis.
- the intermediate link 32 also comprises a first surface 68 that extends from the first end 58 of the intermediate link 32 to the second end 60 of the intermediate link 32 .
- the first surface 68 shown in FIG. 5 , may be considered the outer surface of the intermediate link 32 .
- the intermediate link 32 also defines one or more port portions, referred to herein as grooves.
- link 32 includes a first groove 70 parallel to the longitudinal axis 62 along the first surface 68 , a second groove 72 parallel to the longitudinal axis 62 along the first surface 68 , and a third groove 74 substantially aligned to the longitudinal axis 62 along the first surface 68 .
- Each of the first, second and third grooves 70 , 72 , 74 extend along the first surface 68 from the first end 58 of the intermediate link 32 toward the second end 60 of the intermediate link 32 .
- the first, second and third grooves 70 , 72 , 74 may be semi-tubular shaped and may be arranged in a radially symmetric manner around the longitudinal axis 62 on the first surface 68 of the intermediate link 32 as shown in FIGS. 4 and 5 .
- the size of each of the grooves 70 , 72 , 74 may be identical to one another or may be different from one another.
- the first and second grooves 70 , 72 are configured as segments of a cylinder having a diameter on the order of approximately 1.75 millimeters at the first end 58 of the intermediate link 32
- the third groove 74 is configured as a segment of a cylinder having a diameter on the order of approximately 2.50 millimeters at the first end 58 of the intermediate link 32 .
- the first, second and third grooves 70 , 72 , 74 are each configured to provide a portion of a port structure that receives and partially surrounds any of a variety of
- the intermediate link 32 also defines a through-hole or passage 76 extending from the first end 58 to the second end 60 and is parallel to the longitudinal axis.
- the through-hole or passage 76 may be of a size sufficient to allow one or more cables to pass there-through.
- FIG. 6 illustrates various steps of a motion sequence of the steerable multi-linked device 10 .
- the second mechanism 14 surrounds the first mechanism 12 as shown in step “a” of FIG. 6 , the longitudinal axes of the links 28 , 30 , 32 of the first mechanism 12 are substantially aligned with the respective longitudinal axes 134 , 164 , 212 of the links (e.g. link 126 ) of the second mechanism, and the second end 26 of the first mechanism 12 is at substantially the same position as the second end 122 of the second mechanism 14 .
- a tensioning cable passes through a through-hole of the first mechanism.
- the tensioning cable is pulled tight, thereby placing at least a portion of the first mechanism 12 in the rigid mode by placing a force on the distal link and at least a some intermediate links.
- the steering cables are not pulled tight, thereby placing the second mechanism 14 in the limp mode.
- the second mechanism 14 is then advanced so that its second link 126 is positioned approximately one link ahead of the second end 24 of the first mechanism 12 as shown in step “b” of FIG. 6 .
- the cables 16 , 18 , 20 may be utilized to orient the second link 126 to a particular orientation, where the longitudinal axis 134 of the first link 124 is no longer aligned with the longitudinal axes 164 of the intermediate links 128 of the second mechanism 14 or the longitudinal axis 90 of the second link 30 of the first mechanism 12 .
- the steering cables are pulled with appropriate forces in order to place the second mechanism 14 in the rigid mode, thereby preserving the position and orientation of the second mechanism 14 when the first mechanism is made limp.
- the pulling force of the tensioning cable is then released to place the first mechanism 12 in the limp mode.
- the first mechanism 12 is advanced so that its second link 30 is at substantially the same position as the second end 122 of the second mechanism 14 as shown in step “c” of FIG. 6 .
- the tensioning cable is pulled tight to place the first mechanism 12 back in the rigid mode, thereby preserving the position and orientation of the first mechanism 12 .
- the pulling forces of the steering cables are then released to place the second mechanism 14 back in the limp mode.
- the second mechanism 14 is advanced so that its second link 126 is once again positioned approximately one link ahead of the second end 26 of the first mechanism 12 as shown in step “d” of FIG. 6 .
- the steering cables are pulled with identical force in order to place the second mechanism 14 in the rigid mode, thereby preserving the position and orientation of the second mechanism 14 .
- the pulling force of the tensioning cable is then released to place the first mechanism 12 back in the limp mode.
- the first mechanism 12 is advanced so that its second link 30 is once again at substantially the same position as the second end 122 of the second mechanism 14 as shown in step “e” of FIG. 6 .
- the tensioning cable is pulled tight to place the first mechanism 12 back in the rigid mode, thereby preserving the position and orientation of the first mechanism
- the flexible, snake-like device 10 may include one or more overtubes.
- an overtube may include a series of links in a similar fashion to the second mechanism.
- an overtube may be a snake-like robot, a continuum robot or the like.
- An overtube may be fabricated from metal, plastic, fiber, reinforced fiber, any combination thereof and/or the like.
- an overtube may include one or more through-holes.
- a through-hole may extend along a length of the overtube.
- a through-hole may be substantially cylindrically shaped.
- a through-hole may be configured to surround and receive a cable.
- a through-hole 1800 may receive a steering cable 1805 .
- a steering cable may assist in controlling and guiding the movement of an overtube.
- an overtube 1820 may include one or more grooves, such as the grooves described above with respect to the intermediate link 32 .
- the grooves of an overtube may align with grooves on the outside of a second mechanism to form one or more ports such as port 1900 .
- a port may be a passageway that extends along a length of a device.
- an overtube may wholly contain one or more ports.
- ports may be configured to surround and receive one or more tools.
- overtube 1820 may include one or more through-holes 1800 .
- FIG. 7 illustrates an exemplary through-hole 1905 receiving a tensioning cable 1915 and an exemplary port 1900 receiving a tool 1910 .
- an overtube may surround both the first mechanism 12 and the second mechanism 14 .
- the second mechanism 1405 may surround the first mechanism 1415
- the overtube 1400 may surround the second mechanism 1405 .
- the first mechanism 12 may be positioned concentrically with respect to the second mechanism 14 .
- the first mechanism 1415 may be positioned eccentrically with respect to the second mechanism 1405 .
- the first mechanism 1415 may be located oft-center from the second mechanism 1405 .
- the second mechanism 1405 may be positioned concentrically with respect to the overtube 1400 .
- the second mechanism 1405 may be positioned eccentrically with respect to the overtube 1400 .
- the overtube may be fabricated from plastic, such as polysulfone and/or the like.
- the first mechanism 1415 and the second mechanism 1405 may be collectively considered an inner mechanism, and the overtube 1400 may be considered an outer mechanism.
- the device may operate in a first mode.
- the first mechanism 1415 and the second mechanism 1405 may operate substantially in unison and both mechanisms may alternate between a rigid and a limp state together.
- the operation of the first mechanism 1415 and second mechanism 1405 may be complimentary to the overtube 1400 .
- the first mechanism 1415 and the second mechanism 1405 may both be made limp while the overtube 1400 is made rigid.
- the first mechanism 1415 and the second mechanism 1405 may both be made rigid when the overtube 1400 is made limp.
- the all mechanism may be made rigid at the same time.
- first mechanism 1415 and second mechanism 1405 may advance into the overtube 1400 to a certain position.
- the first mechanism 1415 and the second mechanism 1405 may be made rigid, while the overtube 1400 may be made limp.
- the overtube 1400 may advance over the first mechanism 1415 and the second mechanism 1405 .
- This motion sequence is analogous to the motion sequence describe above and depicted in FIG. 6 .
- the device may operate in a second mode.
- the overtube 1400 may act as a steerable cannula that may be positioned with assistance from the first mechanism 1415 and the second mechanism 1405 .
- the overtube 1400 may be made rigid.
- the first mechanism 1415 and second mechanism 1405 may continue to advance, while the overtube 1400 may remain stationary.
- the overtube 1400 may provide additional length to the flexible, snake-like device 10 , allowing for more flexibility in its positioning and use.
- the overtube 1400 may also provide additional support to the first mechanism (contained within the second mechanism 1405 ) and the second mechanism 1405 .
- the radius of curvature associated with an overtube 1400 may, in some embodiments, be at least as large as the radius of curvature associated with the second mechanism 1405
- FIGS. 9A-9C illustrate exemplary cross-sections of an articulated device having an overtube according to an embodiment.
- a cross-section of an overtube 1400 is highlighted.
- an overtube 1400 may include one or more through-holes 1401 , 1402 , 1403 .
- Steering cables used to control the overtube 1400 may be received by the through-holes 1401 , 1402 , 1403 .
- a cross-section of a second mechanism 1405 is highlighted.
- a second mechanism 1405 may include one or more through-holes 1408 , 1409 , 1410 .
- Steering cables used to control movement of the second mechanism 1405 may be received by the through-holes 1408 , 1409 , 1410 .
- the second mechanism 1405 may include one or more ports 1406 , 1407 .
- a port may be a passageway that extends along the length of a device.
- a port may be formed by the alignment of one or more grooves of a first mechanism and one or more grooves or walls of a second mechanism. In an alternate embodiment shown in FIG.
- a port may be wholly formed in a first mechanism and/or a second mechanism.
- one or more through-holes may be configured to surround and receive one or more tensioning cables and at least one port may be configured to surround tools and/or the like.
- a cross-section of the first mechanism 1415 is highlighted.
- a first device 1415 may include a through-hole 1420 for delivery of a tool.
- an overtube may be used to deliver a plurality of flexible, snake-like devices 10 to a location as illustrated by FIG. 10 .
- FIG. 10 illustrates an overtube surrounding two devices 1500 , 1505 in a parallel configuration, additional devices and/or alternate configurations may be used within the scope of this disclosure.
- each device may be operated in a first mode; such as that described above. In an embodiment, each device may be operated in substantial unison with each of the other devices. For example, while in a limp state, a first device 1500 and a second device 1505 may advance into the overtube 1510 to a certain position. The first device 1500 and the second device 1505 may be made rigid, while the overtube 1510 may be made limp. The overtube 1510 may advance over the first device 1500 and the second device 1505 .
- the devices 1510 , 1505 and the overtube 1510 may operate in a second mode, similar to that described above.
- the overtube 1510 may act as a steerable cannula that may be positioned with assistance from the first device 1500 and the second device 1505 .
- the overtube 1510 may be made rigid.
- the first device 1500 and second device 1505 may continue to advance, while the overtube 1510 may remain stationary.
- the first device 1500 and the second device 1505 may be independently operated as they advance beyond the overtube 1310 .
- the overtube 1310 may provide additional length to the flexible, snake-like device 10 , providing for more flexibility in its positioning and use.
- the overtube 1510 may also provide additional support to the first device 1500 and the second device 1500 .
- FIG. 11 illustrates a cross-section of the device having n-overtubes which are nested concentrically within each other according to an embodiment.
- overtube a 1600 may surround at least a portion of overtube n ⁇ 1 1605 .
- Overtube n ⁇ 1 1605 may in turn surround at least a portion of overtube 4 1610 , and so on.
- a device may have a telescopic configuration.
- any of the overtubes may be steerable or non-steerable, and those which are steerable will have a plurality of associate steering cables.
- Non-steerable devices require only a tensioning cable in a through-hole, and no steering cable.
- the added support provided by additional overtubes may allow a device to reach lengths it otherwise would not be able to reach.
- a device may include one or more first mechanisms, one or more second mechanisms and/or one or more overtubes.
- the first mechanisms, second mechanisms and/or overtubes may be arranged in a nested, parallel and/or in any other configuration or combination of configurations.
- one or more first mechanisms, second mechanisms and/or overtubes may be arranged concentrically, eccentrically and/or the like.
- a first mechanism may be positioned concentrically relative to a second mechanism.
- a device may be positioned eccentrically relative to an overtube.
- FIG. 12 illustrates an tensioning cable 1700 having a first cable portion 1705 and a second cable portion 1720 spliced together.
- a hollow, braided cable 1700 may be used.
- the distal end of the braided cable 1700 may be opened to form a sleeve 1715 , and a shorter, separate section of the same type of cable may be inserted into the open weave of the sleeve 1715 as illustrated by FIG.
- An active section of cable 1720 and a passive section 1705 may be combined such that their longitudinal axes are substantially aligned.
- at least one running stitch 1710 may be run through both cables in the section where they overlap.
- the portion may be approximately 3-5 mm long.
- the stitch may secure the cables together.
- the increased diameter of the longer cable with the shorter cabled spliced into it may act as a force transmission point for the cable of the first mechanism on one of the intermediate links.
- the shorter section of cable may then hive one or more links strung onto it.
- three to five links may be strung onto the shorter section of cable.
- the passive links may be secured with a stopper knot terminating the distal most end at the second link. Because the links of the active portion of the first mechanism may be secured between the feeder and the splice point, the intermediate links that are strung on the shorter section beyond the splice point may not be subject to the same loads. As such, these intermediate links may not become rigid.
- an additional benefit of having the cable spliced may be increased cable strength.
- the cable may break close to the knot at approximately 60 Lbs.
- the cable may break far from the termination point at approximately 100 lbs.
- a first mechanism, a second mechanism and/or an overtube may have any number of ports, through-holes and/or the like.
- the ports and/or through-holes may be arranged such that they are radially symmetric, radially asymmetric and/or the like.
- ports and/or through-holes relative to the first mechanism 12 and/or the second mechanism 14 may vary.
- one or more ports may be placed concentrically or eccentrically on the device 10 .
- one or more ports may be fully contained within one or more mechanisms of the device 10 .
- one or more ports may be fully contained within the second mechanism 14 .
- one or more ports may be fully contained within the first mechanism 12 .
- one or more ports may be split between a plurality of mechanisms of the device 10 .
- one or more ports may be split between the first mechanism 12 and the second mechanism 14 .
- one or more ports may be exposed to the exterior of a mechanism of the device 10 .
- one or more ports may be exposed to the exterior of the second mechanism 14 . Additional and/or alternate port placements may be used within the scope of this disclosure.
- FIGS. 13A-13J Examples of different port and through-hole configurations are illustrated by FIGS. 13A-13J .
- FIG. 13A illustrates an exemplary second mechanism 14 having four through-holes 1700 , 1702 , 1704 , 1706 .
- the through-holes may be eccentrically arranged in a radially symmetric manner. Steering cables may be delivered through the through-holes.
- FIG. 13B illustrates an exemplary second mechanism 14 having three through-holes 1708 , 1710 , 1712 according to an embodiment. As illustrated by FIG. 13B , the through-holes 1708 , 1710 , 1712 may be arranged eccentrically in a radially symmetric manner inside the structure of the second mechanism 14 .
- FIG. 13C illustrates an exemplary second mechanism 14 having three ports 1714 , 1716 , 1718 contained in an outer wall 1720 of the second mechanism 14 .
- the second mechanism 14 may also include one or more through-holes such as those 1713 , 1715 , 1717 illustrated by FIG. 13C .
- the through-holes 1713 , 1715 , 1717 may be arranged eccentrically in a radially symmetric manner.
- the through-holes may be evenly spaced within the arrangement of the ports 1714 , 1716 , 1718 .
- FIG. 13D illustrates an exemplary second mechanism 14 having three ports 1722 , 1724 , 1726 located on the exterior of the second mechanism 14 .
- FIG. 13D also illustrates three through-holes 1764 , 1766 , 1768 .
- the three through-holes 1764 , 1766 , 1768 may support three steering cables.
- the through-holes 1764 , 1766 , 1768 may be arranged eccentrically in a radially symmetric fashion as illustrated by FIG. 13D .
- the triangle that is formed may include a center point of a cross-section of a mechanism.
- the triangle formed by the through-holes 1764 , 1766 , 1768 in FIG. 13 D include a center point 1770 of the second mechanism 14 .
- the through-holes may be arranged as vertices of an equilateral triangle. In an embodiment, there may exist an even number of through-holes, such that each through-hole may have a corresponding through-hole located on the diametric opposite of a mechanism. In an embodiment, each through-hole and diametrically opposite through hole may oppose each other.
- FIG. 13E illustrates an exemplary second mechanism 14 having two ports arranged eccentrically in a radially asymmetric manner 1728 , 1730 .
- the first mechanism 12 may be located eccentrically relative to the second mechanism 14 .
- the ports 1728 , 1730 may be located eccentrically relative to a first mechanism.
- the ports 1728 , 1730 may be completely contained in the second mechanism 14 . As such, no alignment/misalignment of the first mechanism and the second mechanism 14 may be necessary to define any plurality of ports 1728 , 1730 .
- the second mechanism 14 may include one or more through-holes 1727 , 1729 , 1731 .
- the through-holes 1764 , 1766 , 1768 may be spaced to form a triangle as illustrated by FIG. 12E .
- the through-holes 1764 , 1766 , 1768 may be wholly contained in the second mechanism 14 .
- FIG. 12F illustrates an exemplary first mechanism 12 having a single through-hole 1732 for, as an example, a tensioning cable.
- the exemplary first mechanism 12 illustrated by FIG. 12F may correspond to the second mechanism 12 illustrated by FIG. 13E . If the through-hole is positioned concentrically, it is non-steerable, but is lockable when tension is applied. If the through-hole is positioned eccentrically, the first mechanism may be steerable, but not lockable.
- FIG. 13G illustrates an exemplary first mechanism 12 having three through-holes 1734 , 1736 , 1738 for, as an example, three steering cables.
- the first mechanism 12 and/or the second mechanism 14 may be steered with the steering cables.
- the configuration depicted in FIG. 13G is both steerable and lockable.
- FIG. 13H illustrates exemplary ports 1740 , 1742 , 1744 defined by a first mechanism 12 and a second mechanism 14 . As illustrated by FIG. 12H , the ports 1740 , 1742 , 1744 may be located on an exterior portion of the first mechanism 12 and within the structure of the second mechanism 14 .
- FIG. 13I illustrates exemplary ports 1746 , 1748 , 1750 defined by a first mechanism 12 .
- the ports 1746 , 1748 , 1750 may be located on an exterior portion of the first mechanism 12 .
- the first mechanism may have a single through-hole 1747 for, as an example, a tensioning cable.
- FIG. 13J illustrates exemplary ports 1758 , 1760 , 1762 defined by a first mechanism 12 .
- the ports may be located on an exterior portion of the first mechanism 12 .
- the first mechanism 12 may also include one or more through-holes 1752 , 1754 , 1756 . Additional and/or alternate port and through-hole locations may be used within the scope of this disclosure.
- a device 10 having two through-holes eccentrically arranged in a radially symmetric manner for steering cables may be capable of defining a 2 D surface which is planar.
- a device 10 having two through-holes for steering cables may be capable of defining a 2 D surface which is non-planar if the through holes are radially asymmetric.
- a device 10 having an odd number of radially symmetrically or asymmetrically arranged steering cables may require a dedicated actuator for each cable.
- an actuator may be a device capable of providing a load, a force and/or the like.
- Exemplary actuators may include DC motors, stepper motors, EPAM devices, muscles. MicroElectricalMechanical systems (“MEMS”) devices and/or the like.
- FIG. 13B illustrates a device 10 having three through-holes, each of which may support a steering cable.
- each steering cable may require an actuator.
- a device 10 may have an even number of steering cables arranged in a radially symmetric manner.
- each of the steering cables may have a corresponding actuator.
- diametrically opposing pairs of cables may be actuated with a single common actuator.
- FIG. 13A illustrates a device 10 having four through-holes for four steering cables.
- a first steering cable associated with a first through-hole e.g., 1700
- a second steering cable associated with a second through-hole e.g., 1704
- the first steering cable and the second steering cable may be considered an opposing pair.
- the first steering cable may be considered a counterpart to the second steering cable.
- the first steering cable and the second steering cable may be loaded with a single actuator.
- the number of actuators needed to load n steering cables (where n is an even number) may be a number greater than or equal to n and less than or equal to
- each steering cable may have its own actuator or it may share an actuator with an opposing steering cable.
- An additional actuation element is necessary to simultaneously apply tension to all cables in order to lock the mechanism. In such an embodiment the total number of actuators necessary is
- one or more steering cables may be arranged to maximize workspace.
- the length of its counterpart steering cable may be made shorter by an equal amount.
- a first steering cable associated with a first through-hole e.g., 1700
- a second steering cable associated with a second through-hole e.g., 1704
- the first steering cable is made longer by x amount
- the second steering cable may be made shorter by x amount.
Abstract
An articulate probe device includes a first mechanism, a second mechanism, and an overtube mechanism. The first mechanism includes a proximal link which is movable coupled to a first intermediate link, a plurality or intermediate links, and a distal link which is moveably coupled to a second one of the intermediate links. The second mechanism includes a proximal link which is movable coupled to a first intermediate link, a plurality of intermediate links, and a distal link which is moveably coupled to a second one of the intermediate links. The overtube mechanism includes a proximal link which is movable coupled to a first intermediate link, a plurality of intermediate links, and a proximal link which is moveably coupled to a second one of the intermediate links. Further, at least one of the first mechanism, second mechanism, and overtube mechanism is steerable and extendable beyond the other mechanisms.
Description
- This application claims the benefit of the filing date of, and priority to, U.S. Provisional Patent Application No. 61/059,171 filed Jun. 5, 2008.
- This application discloses an invention that is related, generally and in various embodiments, to a multi-linked robotic device, a continuum robot, or other highly articulated device. This device may be used to deliver a tool such as a camera, probe, scalpel or other tool to an area of interest inside a patient's body during a surgical procedure. For minimally invasive procedures, such as cardiac ablation, a minimally complex articulated device is usually sufficient. However, for more complex procedures, a longer device may be necessary. A longer mechanism may require extra support along at least a portion of its length to counteract any increased loading. In addition, the device may need to accommodate additional tools needed to perform certain parts of a more complex procedure.
- Before the present methods are described, it is to be understood that this invention is not limited to the particular systems, methodologies or protocols described, as these may vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present disclosure which will be limited only by the appended claims.
- It must be noted that as used herein and in the appended claims, the singular forms “a.” “an,” and “the” include plural reference unless the context clearly dictates otherwise. Unless defined otherwise, all technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art. As used herein, the term “comprising” means “including, but not limited to.”
- In one general respect, the embodiments disclose an articulated probe device. The articulate probe device includes a first mechanism, a second mechanism, and at least one overtube mechanism. More specifically, the first mechanism includes a first link positioned at a proximal area of the first mechanism, a plurality of intermediate links, wherein a first one of the intermediate links is moveably coupled to the first link, and a second link positioned at a distal area of the second mechanism which is moveably coupled to a second one of the intermediate links. The second mechanism includes a first link positioned at a proximal area of the second mechanism, a plurality of intermediate links, wherein a first one of the intermediate links is moveably coupled to the first link, and a second link positioned at a distal area of the second mechanism and which is moveably coupled to a second one of the intermediate links. The at least one overtube includes a first link positioned at a proximal area of the overtube mechanism, a plurality of intermediate links, wherein a first one of the intermediate links is moveably coupled to the first link, and a second link which is moveably coupled to a second one of the intermediate links and positioned at a proximal area of the overtube mechanism. Further, at least one of the first mechanism, second mechanism, and overtube mechanism is configured to be steerable and extendable beyond the other mechanisms.
- Various embodiments of the invention are described herein by way of example in conjunction with the following figures.
-
FIGS. 1 and 2 illustrate various embodiments of a steerable multi-linked device. -
FIG. 3 illustrates various embodiments of a core mechanism of the device ofFIG. 1 . -
FIGS. 4 and 5 illustrate various embodiments of an intermediate link of the core mechanism. -
FIG. 6 illustrates various embodiments of a motion sequence of the device ofFIG. 1 . -
FIG. 7 illustrates an exemplary cross-section of an overtube according to an embodiment. -
FIG. 8 illustrates an exemplary steerable multi-linked device having an overtube according to an embodiment. -
FIGS. 9A-9C illustrates exemplary cross-sections of a steerable multi-linked device having an overtube according to an embodiment. -
FIG. 10 illustrates exemplary steerable multi-linked devices having an overtube according to an embodiment. -
FIG. 11 illustrates an exemplary cross-section of a steerable multi-linked device according to an embodiment. -
FIG. 12 illustrates an exemplary tensioning cables and splice according to an embodiment. -
FIG. 13A-13J illustrate exemplary port and through-hole configurations are according to an embodiment. - It is to be understood that at least some of the figures and descriptions of the invention have been simplified to focus on elements that are relevant for a clear understanding of the invention, while eliminating, for purposes of clarity, other elements that those of ordinary skill in the an will appreciate may also comprise a portion of the invention. However, because such elements are well known in the art, and because they do not necessarily facilitate a better understanding of the invention, a description of such elements is not provided herein.
- According to various embodiments, the invention described herein may be utilized to control movement of an articulated device, which in the figures and description herein is described as a steerable multi-linked device. In an embodiment, a surgical probe may be an exemplary articulated device. A surgical probe may be used to perform surgical procedures, exploratory procedures and/or the like on humans and/or animals. For ease of explanation purposes, the invention will be described in the context of its use with various embodiments of the steerable multi-linked device described herein. However, one skilled in the an will appreciate that the invention may be utilized with other types of multi-linked devices as well as other types of devices such as, but not limited to, endoscopes, highly articulated devices and/or the like.
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FIG. 1 illustrates a representative embodiment of a highly articulatedextendible probe device 10. The cross-section of such an embodiment is depicted inFIG. 1 . According to the representative embodiment, the device may be a steerable multi-linked device such as a snake-like robot, a continuum robot or the like. Various embodiments of thedevice 10 may be utilized for medical procedures (e.g., as a robotic bore, positioning device, ablation tool, camera or instrument support, or guidance system for minimally invasive procedures), for surveillance applications, for inspection applications, for search and rescue applications, etc. For purposes of clarity only, the utility of thedevice 10 will be described hereinbelow in the context of its applicability to medical procedures. However, a person skilled in the an will appreciate that thedevice 10 can be utilized in a variety of different applications. - The
device 10 comprises afirst mechanism 12 and asecond mechanism 14. According to the representative embodiment, a mechanism may be a series of articulated links, a snake-like robot, a continuum robot or the like. According to the representative embodiment, thesecond mechanism 14 is structured and arranged to receive and surround thefirst mechanism 12 as shown inFIG. 2 . Thus, the first mechanism and second mechanism may be concentric. According to other embodiments, the first andsecond mechanisms second mechanism 14 may surround thefirst mechanism 12, however, thefirst mechanism 12 may be arranged eccentrically with respect to thesecond mechanism 14. According to the representative embodiment, the first andsecond mechanisms first mechanism 12 operates alongside thesecond mechanism 14. According to the representative embodiment, additional and/or alternate configurations may be used within the scope of this disclosure. According to the representative embodiment, a gap or three-dimensional space 240 may be provided between the first and second mechanisms. This space will be described in more detail below. - As described in more detail hereinbelow, the
first mechanism 12 may operate in either a rigid mode or a limp mode, thesecond mechanism 14 may operate in either a rigid mode or a limp mode, and the first andsecond mechanisms device 10. Both thefirst mechanism 12 and thesecond mechanism 14 may be steerable mechanisms. Accordingly, it will be appreciated that thedevice 10 may be utilized to navigate a luminal space as well as any path within a three-dimensional intracavity space, void, or an otherwise unconstrained three dimensional volume. According to the representative embodiment, thedevice 10 may advance by alternating the operation of thefirst mechanism 12 and thesecond mechanism 14 between a limp mode and a rigid mode. Further, both mechanisms can both exist in the rigid mode at the same time. - According to the representative embodiment, the
device 10 may also comprise one or more cables. According to the representative embodiment, one or more of thecables 10 may be steering cables and/or tensioning cables. For example, thedevice 10 may include three cables for steering disposed through the second mechanism and one cable for tensioning which is disposed through the first mechanism. Alternatively, thedevice 10 may include four steering cables. More, fewer, alternative and/or additional cables may be used within the scope of this disclosure. -
FIG. 3 illustrates various embodiments of either mechanism of the device. Shown inFIG. 3 is thefirst mechanism 12 of thedevice 10. Thefirst mechanism 12 is a multi-linked mechanism and includes afirst end 24 and asecond end 26. Thefirst end 24 may be considered the proximal end and thesecond end 26 may be considered the distal end. Thefirst mechanism 12 may comprise afirst link 28, asecond link 30, and one or moreintermediate links 32 between the first andsecond links first link 28 may be considered the proximal link, and thesecond link 30 may be considered the distal link. Any link between theproximal link 28 anddistal link 30 may be considered anintermediate link 32. Exemplar link structures are shown in, for example, U.S. Patent Application Publication No. 200810039690. -
FIGS. 4 and 5 illustrate various views of an exemplaryintermediate link 32 of thefirst mechanism 12 in an embodiment where the inner mechanism serves as the core. Theintermediate link 32 is representative of the otherintermediate links 32. Theintermediate link 32 includes afirst end 58 and asecond end 60, and defines alongitudinal axis 62 that passes through the center of thefirst end 58 and the center of thesecond end 60.Link 32 includes apassage 76 or through-hole which may be positioned along the longitudinal axis, or it may be positioned elsewhere in the link parallel to, or substantially parallel to, the longitudinal axis. - As shown in
FIG. 4 , theintermediate link 32 also comprises afirst surface 68 that extends from thefirst end 58 of theintermediate link 32 to thesecond end 60 of theintermediate link 32. Thefirst surface 68, shown inFIG. 5 , may be considered the outer surface of theintermediate link 32. Theintermediate link 32 also defines one or more port portions, referred to herein as grooves. In the example shown, link 32 includes afirst groove 70 parallel to thelongitudinal axis 62 along thefirst surface 68, asecond groove 72 parallel to thelongitudinal axis 62 along thefirst surface 68, and athird groove 74 substantially aligned to thelongitudinal axis 62 along thefirst surface 68. Each of the first, second andthird grooves first surface 68 from thefirst end 58 of theintermediate link 32 toward thesecond end 60 of theintermediate link 32. The first, second andthird grooves longitudinal axis 62 on thefirst surface 68 of theintermediate link 32 as shown inFIGS. 4 and 5 . The size of each of thegrooves second grooves first end 58 of theintermediate link 32, and thethird groove 74 is configured as a segment of a cylinder having a diameter on the order of approximately 2.50 millimeters at thefirst end 58 of theintermediate link 32. The first, second andthird grooves - The
intermediate link 32 also defines a through-hole orpassage 76 extending from thefirst end 58 to thesecond end 60 and is parallel to the longitudinal axis. The through-hole orpassage 76 may be of a size sufficient to allow one or more cables to pass there-through. -
FIG. 6 illustrates various steps of a motion sequence of the steerablemulti-linked device 10. At the start of the sequence, thesecond mechanism 14 surrounds thefirst mechanism 12 as shown in step “a” ofFIG. 6 , the longitudinal axes of thelinks first mechanism 12 are substantially aligned with the respective longitudinal axes 134, 164, 212 of the links (e.g. link 126) of the second mechanism, and thesecond end 26 of thefirst mechanism 12 is at substantially the same position as the second end 122 of thesecond mechanism 14. A tensioning cable passes through a through-hole of the first mechanism. It is terminated on an actuation component at the proximal area or end of the first mechanism and at a next-to-last link at a distal end. The tensioning cable is pulled tight, thereby placing at least a portion of thefirst mechanism 12 in the rigid mode by placing a force on the distal link and at least a some intermediate links. The steering cables are not pulled tight, thereby placing thesecond mechanism 14 in the limp mode. - The
second mechanism 14 is then advanced so that itssecond link 126 is positioned approximately one link ahead of thesecond end 24 of thefirst mechanism 12 as shown in step “b” ofFIG. 6 . The cables 16, 18, 20 may be utilized to orient thesecond link 126 to a particular orientation, where the longitudinal axis 134 of the first link 124 is no longer aligned with the longitudinal axes 164 of the intermediate links 128 of thesecond mechanism 14 or the longitudinal axis 90 of thesecond link 30 of thefirst mechanism 12. After thesecond link 126 is in the desired position and orientation, the steering cables are pulled with appropriate forces in order to place thesecond mechanism 14 in the rigid mode, thereby preserving the position and orientation of thesecond mechanism 14 when the first mechanism is made limp. - The pulling force of the tensioning cable is then released to place the
first mechanism 12 in the limp mode. After thefirst mechanism 12 is placed in the limp mode, thefirst mechanism 12 is advanced so that itssecond link 30 is at substantially the same position as the second end 122 of thesecond mechanism 14 as shown in step “c” ofFIG. 6 . After thesecond link 30 of thefirst mechanism 12 is in the desired position, the tensioning cable is pulled tight to place thefirst mechanism 12 back in the rigid mode, thereby preserving the position and orientation of thefirst mechanism 12. - The pulling forces of the steering cables are then released to place the
second mechanism 14 back in the limp mode. After thesecond mechanism 14 is placed back in the limp mode, thesecond mechanism 14 is advanced so that itssecond link 126 is once again positioned approximately one link ahead of thesecond end 26 of thefirst mechanism 12 as shown in step “d” ofFIG. 6 . After thesecond link 126 is in the desired position and orientation, the steering cables are pulled with identical force in order to place thesecond mechanism 14 in the rigid mode, thereby preserving the position and orientation of thesecond mechanism 14. - The pulling force of the tensioning cable is then released to place the
first mechanism 12 back in the limp mode. After thefirst mechanism 12 is placed back in the limp mode, thefirst mechanism 12 is advanced so that itssecond link 30 is once again at substantially the same position as the second end 122 of thesecond mechanism 14 as shown in step “e” ofFIG. 6 . After thesecond link 30 of thefirst mechanism 12 is in the desired position and orientation, the tensioning cable is pulled tight to place thefirst mechanism 12 back in the rigid mode, thereby preserving the position and orientation of the first mechanism - In an embodiment, the flexible, snake-
like device 10 may include one or more overtubes. In an embodiment, an overtube may include a series of links in a similar fashion to the second mechanism. In an embodiment, an overtube may be a snake-like robot, a continuum robot or the like. An overtube may be fabricated from metal, plastic, fiber, reinforced fiber, any combination thereof and/or the like. - In an embodiment, an overtube may include one or more through-holes. A through-hole may extend along a length of the overtube. In an embodiment, a through-hole may be substantially cylindrically shaped. A through-hole may be configured to surround and receive a cable. For example, as illustrated by
FIG. 13 , a through-hole 1800 may receive a steering cable 1805. In an embodiment, a steering cable may assist in controlling and guiding the movement of an overtube. - In an embodiment, an
overtube 1820 may include one or more grooves, such as the grooves described above with respect to theintermediate link 32. The grooves of an overtube may align with grooves on the outside of a second mechanism to form one or more ports such asport 1900. A port may be a passageway that extends along a length of a device. In an embodiment, an overtube may wholly contain one or more ports. In an embodiment, ports may be configured to surround and receive one or more tools. Additionally, overtube 1820 may include one or more through-holes 1800. For example,FIG. 7 illustrates an exemplary through-hole 1905 receiving atensioning cable 1915 and anexemplary port 1900 receiving atool 1910. - In an embodiment, an overtube may surround both the
first mechanism 12 and thesecond mechanism 14. For example, as illustrated byFIGS. 9A-9C , thesecond mechanism 1405 may surround thefirst mechanism 1415, and theovertube 1400 may surround thesecond mechanism 1405. In an embodiment, as shown inFIG. 2 , thefirst mechanism 12 may be positioned concentrically with respect to thesecond mechanism 14. Alternatively, as shown inFIGS. 9A-9C , thefirst mechanism 1415 may be positioned eccentrically with respect to thesecond mechanism 1405. For example, thefirst mechanism 1415 may be located oft-center from thesecond mechanism 1405. In an embodiment, thesecond mechanism 1405 may be positioned concentrically with respect to theovertube 1400. Alternatively, thesecond mechanism 1405 may be positioned eccentrically with respect to theovertube 1400. In an embodiment, the overtube may be fabricated from plastic, such as polysulfone and/or the like. - In an embodiment, the
first mechanism 1415 and thesecond mechanism 1405 may be collectively considered an inner mechanism, and theovertube 1400 may be considered an outer mechanism. In an embodiment, the device may operate in a first mode. Thefirst mechanism 1415 and thesecond mechanism 1405 may operate substantially in unison and both mechanisms may alternate between a rigid and a limp state together. The operation of thefirst mechanism 1415 andsecond mechanism 1405 may be complimentary to theovertube 1400. For example, thefirst mechanism 1415 and thesecond mechanism 1405 may both be made limp while theovertube 1400 is made rigid. Alternatively, thefirst mechanism 1415 and thesecond mechanism 1405 may both be made rigid when theovertube 1400 is made limp. Still further, the all mechanism may be made rigid at the same time. - For example, while in a limp state, the
first mechanism 1415 andsecond mechanism 1405 may advance into theovertube 1400 to a certain position. Thefirst mechanism 1415 and thesecond mechanism 1405 may be made rigid, while theovertube 1400 may be made limp. Theovertube 1400 may advance over thefirst mechanism 1415 and thesecond mechanism 1405. This motion sequence is analogous to the motion sequence describe above and depicted inFIG. 6 . - In an embodiment, the device may operate in a second mode. In a second mode, the
overtube 1400 may act as a steerable cannula that may be positioned with assistance from thefirst mechanism 1415 and thesecond mechanism 1405. For example, after reaching a target location, theovertube 1400 may be made rigid. Thefirst mechanism 1415 andsecond mechanism 1405 may continue to advance, while theovertube 1400 may remain stationary. As illustrated inFIG. 8 , theovertube 1400 may provide additional length to the flexible, snake-like device 10, allowing for more flexibility in its positioning and use. Theovertube 1400 may also provide additional support to the first mechanism (contained within the second mechanism 1405) and thesecond mechanism 1405. As illustrated byFIG. 7 , the radius of curvature associated with anovertube 1400 may, in some embodiments, be at least as large as the radius of curvature associated with thesecond mechanism 1405 -
FIGS. 9A-9C illustrate exemplary cross-sections of an articulated device having an overtube according to an embodiment. InFIG. 9A , a cross-section of anovertube 1400 is highlighted. As illustrated byFIG. 9A , anovertube 1400 may include one or more through-holes overtube 1400 may be received by the through-holes - In
FIG. 9B , a cross-section of asecond mechanism 1405 is highlighted. As illustrated byFIG. 9B , asecond mechanism 1405 may include one or more through-holes second mechanism 1405 may be received by the through-holes second mechanism 1405 may include one ormore ports FIG. 9B , a port may be wholly formed in a first mechanism and/or a second mechanism. In an embodiment, one or more through-holes may be configured to surround and receive one or more tensioning cables and at least one port may be configured to surround tools and/or the like. - In
FIG. 9C , a cross-section of thefirst mechanism 1415 is highlighted. As illustrated byFIG. 9C , afirst device 1415 may include a through-hole 1420 for delivery of a tool. - In an embodiment, an overtube may be used to deliver a plurality of flexible, snake-
like devices 10 to a location as illustrated byFIG. 10 . AlthoughFIG. 10 illustrates an overtube surrounding twodevices - In an embodiment, each device may be operated in a first mode; such as that described above. In an embodiment, each device may be operated in substantial unison with each of the other devices. For example, while in a limp state, a
first device 1500 and asecond device 1505 may advance into theovertube 1510 to a certain position. Thefirst device 1500 and thesecond device 1505 may be made rigid, while theovertube 1510 may be made limp. Theovertube 1510 may advance over thefirst device 1500 and thesecond device 1505. - In an embodiment, the
devices overtube 1510 may operate in a second mode, similar to that described above. In an embodiment, theovertube 1510 may act as a steerable cannula that may be positioned with assistance from thefirst device 1500 and thesecond device 1505. For example, after reaching a target location, theovertube 1510 may be made rigid. Thefirst device 1500 andsecond device 1505 may continue to advance, while theovertube 1510 may remain stationary. Thefirst device 1500 and thesecond device 1505 may be independently operated as they advance beyond the overtube 1310. The overtube 1310 may provide additional length to the flexible, snake-like device 10, providing for more flexibility in its positioning and use. Theovertube 1510 may also provide additional support to thefirst device 1500 and thesecond device 1500. - In an embodiment, a plurality of overtubes arranged in a nested structure may be used in conjunction with one or more devices.
FIG. 11 illustrates a cross-section of the device having n-overtubes which are nested concentrically within each other according to an embodiment. As illustrated byFIG. 11 , overtube a 1600 may surround at least a portion of overtube n−1 1605. Overtube n−1 1605 may in turn surround at least a portion ofovertube 4 1610, and so on. As illustrated byFIG. 11 , with a nested arrangement, either concentrically or eccentrically, of n-overtubes, a device may have a telescopic configuration. Any of the overtubes may be steerable or non-steerable, and those which are steerable will have a plurality of associate steering cables. Non-steerable devices require only a tensioning cable in a through-hole, and no steering cable. In an embodiment, the added support provided by additional overtubes may allow a device to reach lengths it otherwise would not be able to reach. - In an embodiment, a device may include one or more first mechanisms, one or more second mechanisms and/or one or more overtubes. The first mechanisms, second mechanisms and/or overtubes may be arranged in a nested, parallel and/or in any other configuration or combination of configurations. In an embodiment, one or more first mechanisms, second mechanisms and/or overtubes may be arranged concentrically, eccentrically and/or the like. For example, a first mechanism may be positioned concentrically relative to a second mechanism. Similarly, a device may be positioned eccentrically relative to an overtube.
- In an embodiment, when a first mechanism is disposed eccentrically relative to a second mechanism, the first mechanism may “break out” of the channel through which it disposed during advancement when the device is highly curved. To resolve this problem, a passive section of inner links may be added to a distal end of the first mechanism.
FIG. 12 illustrates antensioning cable 1700 having afirst cable portion 1705 and asecond cable portion 1720 spliced together. For example, a hollow, braidedcable 1700 may be used. In an embodiment, the distal end of thebraided cable 1700 may be opened to form asleeve 1715, and a shorter, separate section of the same type of cable may be inserted into the open weave of thesleeve 1715 as illustrated byFIG. 12 . An active section ofcable 1720 and apassive section 1705 may be combined such that their longitudinal axes are substantially aligned. After a portion of the shorter segment is inserted into the open braid of the longer cable, at least onerunning stitch 1710 may be run through both cables in the section where they overlap. In an embodiment, the portion may be approximately 3-5 mm long. In an embodiment, the stitch may secure the cables together. - In an embodiment, the increased diameter of the longer cable with the shorter cabled spliced into it may act as a force transmission point for the cable of the first mechanism on one of the intermediate links. The shorter section of cable may then hive one or more links strung onto it. In an embodiment, three to five links may be strung onto the shorter section of cable. In an embodiment, the passive links may be secured with a stopper knot terminating the distal most end at the second link. Because the links of the active portion of the first mechanism may be secured between the feeder and the splice point, the intermediate links that are strung on the shorter section beyond the splice point may not be subject to the same loads. As such, these intermediate links may not become rigid.
- In an embodiment, an additional benefit of having the cable spliced may be increased cable strength. For example, with a 150 lb test cable, the cable may break close to the knot at approximately 60 Lbs. With a splice, however, the cable may break far from the termination point at approximately 100 lbs.
- In an embodiment, a first mechanism, a second mechanism and/or an overtube may have any number of ports, through-holes and/or the like. In an embodiment, the ports and/or through-holes may be arranged such that they are radially symmetric, radially asymmetric and/or the like.
- In an embodiment, placement of ports and/or through-holes relative to the
first mechanism 12 and/or thesecond mechanism 14 may vary. For example, one or more ports may be placed concentrically or eccentrically on thedevice 10. In addition, one or more ports may be fully contained within one or more mechanisms of thedevice 10. For example, one or more ports may be fully contained within thesecond mechanism 14. Similarly, one or more ports may be fully contained within thefirst mechanism 12. In an embodiment, one or more ports may be split between a plurality of mechanisms of thedevice 10. For example, one or more ports may be split between thefirst mechanism 12 and thesecond mechanism 14. In such an embodiment, when the internal grooves of the second mechanism are substantially aligned with the external grooves of the first mechanism, a number of larger ports equal to the number of grooves on the first/second mechanism will be shared by the two mechanisms. In another embodiment, when the internal grooves of the second mechanism are substantially misaligned with the external grooves of the first mechanism, a number of smaller ports equal to twice the number of grooves on the first/second mechanism will exist. In an embodiment, one or more ports may be exposed to the exterior of a mechanism of thedevice 10. For example, one or more ports may be exposed to the exterior of thesecond mechanism 14. Additional and/or alternate port placements may be used within the scope of this disclosure. - Examples of different port and through-hole configurations are illustrated by
FIGS. 13A-13J . For example,FIG. 13A illustrates an exemplarysecond mechanism 14 having four through-holes FIG. 13A , the through-holes may be eccentrically arranged in a radially symmetric manner. Steering cables may be delivered through the through-holes. -
FIG. 13B illustrates an exemplarysecond mechanism 14 having three through-holes FIG. 13B , the through-holes second mechanism 14. -
FIG. 13C illustrates an exemplarysecond mechanism 14 having threeports outer wall 1720 of thesecond mechanism 14. Thesecond mechanism 14 may also include one or more through-holes such as those 1713, 1715, 1717 illustrated byFIG. 13C . In an embodiment, the through-holes ports -
FIG. 13D illustrates an exemplarysecond mechanism 14 having threeports second mechanism 14.FIG. 13D also illustrates three through-holes holes holes FIG. 13D . In an embodiment, the triangle that is formed may include a center point of a cross-section of a mechanism. For example, the triangle formed by the through-holes second mechanism 14. In an embodiment, the through-holes may be arranged as vertices of an equilateral triangle. In an embodiment, there may exist an even number of through-holes, such that each through-hole may have a corresponding through-hole located on the diametric opposite of a mechanism. In an embodiment, each through-hole and diametrically opposite through hole may oppose each other. -
FIG. 13E illustrates an exemplarysecond mechanism 14 having two ports arranged eccentrically in a radiallyasymmetric manner FIG. 13E , thefirst mechanism 12 may be located eccentrically relative to thesecond mechanism 14. Theports FIG. 13E , theports second mechanism 14. As such, no alignment/misalignment of the first mechanism and thesecond mechanism 14 may be necessary to define any plurality ofports FIG. 13E , thesecond mechanism 14 may include one or more through-holes holes FIG. 12E . In an embodiment, the through-holes second mechanism 14. -
FIG. 12F illustrates an exemplaryfirst mechanism 12 having a single through-hole 1732 for, as an example, a tensioning cable. In an embodiment, the exemplaryfirst mechanism 12 illustrated byFIG. 12F may correspond to thesecond mechanism 12 illustrated byFIG. 13E . If the through-hole is positioned concentrically, it is non-steerable, but is lockable when tension is applied. If the through-hole is positioned eccentrically, the first mechanism may be steerable, but not lockable. -
FIG. 13G illustrates an exemplaryfirst mechanism 12 having three through-holes first mechanism 12 and/or thesecond mechanism 14 may be steered with the steering cables. In contrast to a single through-hole configuration fromFIG. 13F , the configuration depicted inFIG. 13G is both steerable and lockable. -
FIG. 13H illustratesexemplary ports first mechanism 12 and asecond mechanism 14. As illustrated byFIG. 12H , theports first mechanism 12 and within the structure of thesecond mechanism 14. -
FIG. 13I illustratesexemplary ports first mechanism 12. As illustrated byFIG. 12I , theports first mechanism 12. In an embodiment, the first mechanism may have a single through-hole 1747 for, as an example, a tensioning cable. -
FIG. 13J illustratesexemplary ports first mechanism 12. As illustrated byFIG. 13J , the ports may be located on an exterior portion of thefirst mechanism 12. Thefirst mechanism 12 may also include one or more through-holes - In an embodiment, a
device 10 having two through-holes eccentrically arranged in a radially symmetric manner for steering cables may be capable of defining a 2D surface which is planar. In contrast, adevice 10 having two through-holes for steering cables may be capable of defining a 2D surface which is non-planar if the through holes are radially asymmetric. In an embodiment, adevice 10 having an odd number of radially symmetrically or asymmetrically arranged steering cables may require a dedicated actuator for each cable. For example, if adevice 10 has n steering cables, where n is an odd number, or where n is an even number and the holes are arranged in a radially asymmetric fashion, n actuators may be necessary to load the n steering cables. In an embodiment, an actuator may be a device capable of providing a load, a force and/or the like. Exemplary actuators may include DC motors, stepper motors, EPAM devices, muscles. MicroElectricalMechanical systems (“MEMS”) devices and/or the like. - For example,
FIG. 13B illustrates adevice 10 having three through-holes, each of which may support a steering cable. As the device inFIG. 13B has an odd number of steering cables (i.e., 3), each steering cable may require an actuator. - In an embodiment, a
device 10 may have an even number of steering cables arranged in a radially symmetric manner. In an embodiment, each of the steering cables may have a corresponding actuator. Alternatively, diametrically opposing pairs of cables may be actuated with a single common actuator. For example,FIG. 13A illustrates adevice 10 having four through-holes for four steering cables. A first steering cable associated with a first through-hole (e.g., 1700) may be located opposite a second steering cable associated with a second through-hole (e.g., 1704). The first steering cable and the second steering cable may be considered an opposing pair. In an embodiment, the first steering cable may be considered a counterpart to the second steering cable. In an embodiment, the first steering cable and the second steering cable may be loaded with a single actuator. In an embodiment, the number of actuators needed to load n steering cables (where n is an even number) may be a number greater than or equal to n and less than or equal to -
- because each steering cable may have its own actuator or it may share an actuator with an opposing steering cable. An additional actuation element is necessary to simultaneously apply tension to all cables in order to lock the mechanism. In such an embodiment the total number of actuators necessary is
-
- In an embodiment, one or more steering cables may be arranged to maximize workspace. For
devices 10 having an even number of steering cables, as one steering cable is made longer from the steering process, the length of its counterpart steering cable may be made shorter by an equal amount. For example, referring toFIG. 13A , a first steering cable associated with a first through-hole (e.g., 1700) may be located opposite a second steering cable associated with a second through-hole (e.g., 1704). As the first steering cable is made longer by x amount, the second steering cable may be made shorter by x amount. - While several embodiments of the invention have been described herein by way of example, those skilled in the art will appreciate that various modifications, alterations, and adaptations to the described embodiments may be realized without departing from the spirit and scope of the invention defined by the appended claims.
Claims (15)
1.-45. (canceled)
46. An articulated probe device, comprising:
a first multi-linked mechanism that comprises a passage that extends from a proximal end of the first multi-linked mechanism toward a distal end of the first multi-linked mechanism along a longitudinal axis of the first multi-linked mechanism;
a second multi-linked mechanism that concentrically surrounds at least a portion of the first multi-linked mechanism;
one or more steering cables; and
an overtube mechanism that concentrically surrounds at least a portion of the first multi-linked mechanism and a portion of the second multi-linked mechanism, the overtube mechanism comprising:
a first link positioned at a proximal area of the overtube mechanism,
a plurality of intermediate links, wherein a first one of the intermediate links is movably coupled to the first link,
a second link which is moveably coupled to a second one of the intermediate links and positioned at a distal area of the overtube mechanism, and
one or more through-holes that extend along a length of the overtube mechanism, wherein the through-holes are configured to surround at least a portion of the steering cables.
47. The articulated probe device of claim 46 , wherein at least one of the first multi-linked mechanism, the second multi-linked mechanism, and the overtube mechanism is configured to be steerable and extendable beyond the other mechanisms.
48. The articulated probe of claim 46 , wherein at least one of the steering cables is configured to be terminated at a first end on the second link of the overtube mechanism and at an end of an actuation component at the proximate area of the overtube mechanism.
49. The articulated probe of claim 48 , wherein the steering cable transmits force to the second link of the overtube mechanism.
50. The articulated probe of claim 46 , wherein the steering cables transmit forces to at least one of the intermediate links of the overtube mechanism so that the overtube mechanism exists in a limp mode when the steering cables are slack, and so that at least a portion of the overtube mechanism exists in a rigid mode when all the steering cables are under equal tension.
51. The articulated probe of claim 46 , wherein the through holes are eccentrically arranged in a radially symmetric pattern.
52. The articulated probe of claim 46 , wherein the overtube mechanism is configured to advance over the first multi-linked mechanism and the second multi-linked mechanism when the first multi-linked mechanism operates in a rigid mode.
53. The articulated probe of claim 46 , wherein a radius of curvature of the overtube mechanism is at least as large as a radius of curvature of the second multi-linked mechanism.
54. The articulated probe of claim 46 , further comprising a second overtube mechanism configured to surround at least a portion of the overtube mechanism.
55. The articulated probe of claim 46 , wherein each steering cable is associated with an actuator that is configured to provide a force to the steering cable.
56. The articulated probe of claim 46 , wherein the first multi-linked mechanism comprises a through-hole through which is disposed a second steering cable, wherein:
a first end of the second steering cable is configured to be terminated on an actuation component at a proximal area of the first multi-linked mechanism, and
a second end of the second steering cable is configured to be terminated at a link of the first multi-linked mechanism so that the second steering cable transmits force to the link of the first multi-linked mechanism.
57. The articulated probe of claim 46 , wherein the second multi-linked mechanism comprises:
at least two through-holes; and
a plurality of second steering cables, wherein each second steering cable is positioned to correspond to and pass through one of the through-holes of the second multi-linked mechanism.
58. The articulated probe of claim 46 , wherein:
the first multi-linked mechanism comprises one or more second through-holes,
the second multi-linked mechanism comprises one or more third through-holes.
59. The articulated probe of claim 58 , further comprising:
one or more second steering cables; and
one or more third steering cables,
wherein the one or more second through-holes are configured to surround at least a portion of the one or more second steering cables,
wherein the one or more third through-holes are configured to surround at least a portion of the one or more third steering cables.
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US20170100198A1 (en) | 2017-04-13 |
CA2726983C (en) | 2018-02-06 |
EP2296526A4 (en) | 2013-09-11 |
US20180200011A1 (en) | 2018-07-19 |
AU2009255959A1 (en) | 2009-12-10 |
EP2296526A1 (en) | 2011-03-23 |
CA2726983A1 (en) | 2009-12-10 |
US8945096B2 (en) | 2015-02-03 |
EP2296526B1 (en) | 2017-12-06 |
ES2658968T3 (en) | 2018-03-13 |
US20110184241A1 (en) | 2011-07-28 |
US20160167223A1 (en) | 2016-06-16 |
AU2009255959B2 (en) | 2013-11-28 |
US9505125B2 (en) | 2016-11-29 |
WO2009149421A1 (en) | 2009-12-10 |
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