WO2021067024A1 - Instruments médicaux permettant d'effectuer des interventions à effraction minimale - Google Patents

Instruments médicaux permettant d'effectuer des interventions à effraction minimale Download PDF

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Publication number
WO2021067024A1
WO2021067024A1 PCT/US2020/050480 US2020050480W WO2021067024A1 WO 2021067024 A1 WO2021067024 A1 WO 2021067024A1 US 2020050480 W US2020050480 W US 2020050480W WO 2021067024 A1 WO2021067024 A1 WO 2021067024A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
handle
articulating portion
articulation
end effector
Prior art date
Application number
PCT/US2020/050480
Other languages
English (en)
Inventor
Amos Cruz
Jonathan O'keefe
Niklas Helmick
Jonathan E. Wilson
Original Assignee
Lumendi Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US16/678,688 external-priority patent/US11504104B2/en
Application filed by Lumendi Ltd. filed Critical Lumendi Ltd.
Priority to EP20871823.9A priority Critical patent/EP4041104A4/fr
Publication of WO2021067024A1 publication Critical patent/WO2021067024A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A61B17/2909—Handles
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/320016—Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/3201—Scissors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • 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
    • 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
    • A61B2017/00309—Cut-outs or slits
    • 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
    • A61B2017/00327—Cables or rods with actuating members moving in opposite directions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/0042—Surgical instruments, devices or methods, e.g. tourniquets with special provisions for gripping
    • A61B2017/00424—Surgical instruments, devices or methods, e.g. tourniquets with special provisions for gripping ergonomic, e.g. fitting in fist
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/0046—Surgical instruments, devices or methods, e.g. tourniquets with a releasable handle; with handle and operating part separable
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00477—Coupling
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A61B2017/2901—Details of shaft
    • A61B2017/2905—Details of shaft flexible
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A61B2017/2901—Details of shaft
    • A61B2017/2908—Multiple segments connected by articulations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A61B17/2909—Handles
    • A61B2017/2925—Pistol grips
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A61B2017/2926—Details of heads or jaws
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A61B2017/2926—Details of heads or jaws
    • A61B2017/2927—Details of heads or jaws the angular position of the head being adjustable with respect to the shaft
    • A61B2017/2929—Details of heads or jaws the angular position of the head being adjustable with respect to the shaft with a head rotatable about the longitudinal axis of the shaft
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
    • A61B2018/00601—Cutting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00636—Sensing and controlling the application of energy
    • A61B2018/00696—Controlled or regulated parameters
    • A61B2018/00702—Power or energy
    • 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
    • A61B34/74—Manipulators with manual electric input means
    • A61B2034/742—Joysticks
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/50—Supports for surgical instruments, e.g. articulated arms
    • A61B90/57—Accessory clamps
    • A61B2090/571—Accessory clamps for clamping a support arm to a bed or other supports
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/50—Supports for surgical instruments, e.g. articulated arms

Definitions

  • This invention relates to medical instruments in general, and more particularly to medical instruments for performing minimally-invasive procedures.
  • Minimally-invasive medical procedures have become commonplace.
  • access to an internal site is effected through one or more small portals (e.g., a natural body orifice, a small incision in the skin, etc.).
  • a scope e.g., a colonoscope, an arthroscope, an endoscope, etc.
  • a scope is inserted through a portal so as to provide visualization of the internal site, and then one or more medical instruments are inserted, either through the same portal (e.g., via an internal channel in the scope) or through another portal, so that the medical instruments can be used to carry out a procedure at the internal site under the visualization provided by the scope.
  • the internal site may be difficult to reach due to anatomical constraints, equipment limitations, etc.
  • a medical instrument may be advanced to the internal site through an internal channel of a scope, or for a medical instrument to be advanced to the internal site alongside the scope, and then bent (e.g., along a short radius) so as to enter the visual field of the scope, so that the desired procedure is carried out under the visualization provided by the scope.
  • the path along which the medical instrument needs to be advanced may be tortuous (e.g., endoluminally within the colon).
  • the medical instrument it is necessary for the medical instrument to be highly flexible, capable of articulating with a range of different motions, and configured for precise control, while being operated (e.g., along a tortuous path) from only the handle end (i.e., the proximal end) of the medical instrument. In practice, this is extremely difficult to achieve.
  • the present invention is intended to provide a novel medical instrument capable of such function.
  • the present invention comprises a novel medical instrument for performing minimally-invasive procedures.
  • the novel medical instrument is highly flexible, capable of articulating with a range of different motions, and configured for precise control, while being operated (e.g., along a tortuous path) from only the handle end of the medical instrument.
  • the novel medical instrument generally comprises a handle and a shaft extending distally from the handle.
  • the shaft generally comprises an elongated, flexible proximal portion and a distal articulating portion which is mounted to the distal end of the flexible proximal portion.
  • An end effector is mounted to the distal end of the distal articulating portion.
  • the end effector may take many different forms (e.g., graspers, injection needles, scissors, hot snares, monopolar probes, hemostasis clips, bipolar forceps, suction tubes, single-fire or multi-fire closure devices such as staplers and tackers, dissector forceps, retrieval baskets, monopolar scissors, light sources, cameras, etc.).
  • the handle may take any one of many different forms (e.g., a pistol grip, a shaft grip, etc.).
  • the handle is shown in the figures as a pistol grip.
  • the flexible proximal portion of the shaft is configured to be a highly flexible element capable of extending a significant length (e.g., 95 cm - 140 cm) along a tortuous path
  • the distal articulating portion of the shaft is configured to be capable of universal articulation relative to the distal end of the flexible proximal portion of the shaft
  • the end effector is configured to be selectively rotated relative to the distal end of the distal articulating portion and may be selectively actuated, with all functions able to be carried out by a single hand of a user via the handle.
  • substantially the entire shaft of the medical instrument is flexible, with the portion of the shaft proximal to a transition point (i.e., the flexible proximal portion) being passively flexible (e.g., able to follow a tortuous path), and the portion of the shaft distal to the transition point (i.e., the distal articulating portion) being actively flexible (e.g., able to be universally articulated to a desired configuration).
  • novel medical instrument is capable of at least the following motions:
  • Motion 1 longitudinal movement of the end effector by longitudinal movement of the handle (sometimes hereinafter referred to as a “longitudinal motion function”);
  • Motion 2 rotational movement of the end effector by rotational movement of the handle (sometimes hereinafter referred to as a “torquing motion function”);
  • Motion 4 rotational movement of the end effector relative to the distal end of the distal articulating portion of the shaft by rotating the end effector relative to the shaft
  • Motion 5 - actuation of the end effector, e.g., selectively moving elements of the end effector relative to one another so as to carry out a medical procedure, e.g., opening and closing the jaws of a grasper-type end effector (sometimes hereinafter referred to as a “jaw open/close function”).
  • apparatus for performing a minimally-invasive procedure comprising: a tool comprising: a shaft having a distal end and a proximal end; a handle attached to the proximal end of the shaft; and an end effector attached to the distal end of the shaft; wherein the shaft comprises a flexible portion extending distally from the proximal end of the shaft, and an articulating portion extending proximally from the distal end of the shaft, and wherein the articulating portion comprises a flexible spine; wherein a plurality of articulation cables extend through the shaft from the handle to the flexible spine, each of the plurality of articulation cables having an articulation cable housing disposed about the articulation cable such that when tension is applied to at least one of the plurality of articulation cables, the flexible spine bends, with the articulation cable housings providing a counterforce to the flexible spine; wherein a rotatable element extends through the shaft from the handle to the end effect
  • a method for performing a minimally-invasive procedure comprising: obtaining apparatus for performing a minimally-invasive procedure, the apparatus comprising: a tool comprising: a shaft having a distal end and a proximal end; a handle attached to the proximal end of the shaft; and an end effector attached to the distal end of the shaft; wherein the shaft comprises a flexible portion extending distally from the proximal end of the shaft, and an articulating portion extending proximally from the distal end of the shaft, and wherein the articulating portion comprises a flexible spine; wherein a plurality of articulation cables extend through the shaft from the handle to the flexible spine, each of the plurality of articulation cables having an articulation cable housing disposed about the articulation cable such that when tension is applied to at least one of the plurality of articulation cables, the flexible spine bends, with the articulation cable housings providing a counterforce to the flexible spine; where
  • apparatus for performing a minimally-invasive procedure comprising: a tool comprising: a shaft having a distal end and a proximal end; a handle attached to the proximal end of the shaft; and an end effector attached to the distal end of the shaft; wherein the shaft comprises a flexible portion extending distally from the proximal end of the shaft, and an articulating portion extending proximally from the distal end of the shaft, and wherein the articulating portion comprises a flexible spine; wherein a plurality of articulation cables extend through the shaft from the handle to the flexible spine, such that when tension is applied to at least one of the plurality of articulation cables, the flexible spine bends; wherein a rotatable element extends through the shaft from the handle to the end effector, such that when the rotatable element is rotated, the end effector rotates, wherein the rotatable element comprises a hollow tubular structure extending distally from
  • a method for performing a minimally-invasive procedure comprising: obtaining apparatus for performing a minimally-invasive procedure, the apparatus comprising: a tool comprising: a shaft having a distal end and a proximal end; a handle attached to the proximal end of the shaft; and an end effector attached to the distal end of the shaft; wherein the shaft comprises a flexible portion extending distally from the proximal end of the shaft, and an articulating portion extending proximally from the distal end of the shaft, and wherein the articulating portion comprises a flexible spine; wherein a plurality of articulation cables extend through the shaft from the handle to the flexible spine, such that when tension is applied to at least one of the plurality of articulation cables, the flexible spine bends; wherein a rotatable element extends through the shaft from the handle to the end effector, such that when the rotatable element is rotated, the end effector rotates, where
  • apparatus for performing a minimally-invasive procedure comprising: a tool comprising: a shaft having a distal end and a proximal end; a handle attached to the proximal end of the shaft; and an end effector attached to the distal end of the shaft; wherein the shaft comprises a flexible portion extending distally from the proximal end of the shaft, and an articulating portion extending proximally from the distal end of the shaft, and wherein the articulating portion comprises a flexible spine; wherein a plurality of articulation cables extend through the shaft from the handle to the flexible spine, such that when tension is applied to at least one of the plurality of articulation cables, the flexible spine bends; wherein a rotatable element extends through the shaft from the handle to the end effector, such that when the rotatable element is rotated, the end effector rotates; wherein an actuation element extends through the shaft from the handle to the end effector,
  • a method for performing a minimally-invasive procedure comprising: obtaining apparatus for performing a minimally-invasive procedure, the apparatus comprising: a tool comprising: a shaft having a distal end and a proximal end; a handle attached to the proximal end of the shaft; and an end effector attached to the distal end of the shaft; wherein the shaft comprises a flexible portion extending distally from the proximal end of the shaft, and an articulating portion extending proximally from the distal end of the shaft, and wherein the articulating portion comprises a flexible spine; wherein a plurality of articulation cables extend through the shaft from the handle to the flexible spine, such that when tension is applied to at least one of the plurality of articulation cables, the flexible spine bends; wherein a rotatable element extends through the shaft from the handle to the end effector, such that when the rotatable element is rotated, the end effector rotates; where
  • apparatus for performing a minimally-invasive procedure comprising: a tool comprising: a shaft having a distal end and a proximal end; a handle attached to the proximal end of the shaft; and an end effector attached to the distal end of the shaft; wherein the shaft comprises a flexible portion extending distally from the proximal end of the shaft, and an articulating portion extending proximally from the distal end of the shaft, and wherein the articulating portion comprises a flexible spine; wherein a plurality of articulation cables extend through the shaft from the handle to the flexible spine, such that when tension is applied to at least one of the plurality of articulation cables, the flexible spine bends; wherein a rotatable element extends through the shaft from the handle to the end effector, such that when the rotatable element is rotated, the end effector rotates; wherein an actuation element extends through the shaft from the handle to the end effector,
  • a method for performing a minimally-invasive procedure comprising: obtaining apparatus for performing a minimally-invasive procedure, the apparatus comprising: a tool comprising: a shaft having a distal end and a proximal end; a handle attached to the proximal end of the shaft; and an end effector attached to the distal end of the shaft; wherein the shaft comprises a flexible portion extending distally from the proximal end of the shaft, and an articulating portion extending proximally from the distal end of the shaft, and wherein the articulating portion comprises a flexible spine; wherein a plurality of articulation cables extend through the shaft from the handle to the flexible spine, such that when tension is applied to at least one of the plurality of articulation cables, the flexible spine bends; wherein a rotatable element extends through the shaft from the handle to the end effector, such that when the rotatable element is rotated, the end effector rotates; where
  • apparatus for performing a minimally-invasive procedure comprising: a tool comprising: a shaft having a distal end and a proximal end; a handle attached to the proximal end of the shaft; and an end effector attached to the distal end of the shaft; wherein the shaft comprises a flexible portion extending distally from the proximal end of the shaft, and an articulating portion extending proximally from the distal end of the shaft, and wherein the articulating portion comprises a flexible spine; wherein a plurality of articulation cables extend through the shaft from the handle to the flexible spine, such that when tension is applied to at least one of the plurality of articulation cables, the flexible spine bends; wherein a rotatable element extends through the shaft from the handle to the end effector, such that when the rotatable element is rotated, the end effector rotates; and wherein an actuation element extends through the shaft from the handle to the end effector
  • a method for performing a minimally-invasive procedure comprising: obtaining apparatus for performing a minimally-invasive procedure, the apparatus comprising: a tool comprising: a shaft having a distal end and a proximal end; a handle attached to the proximal end of the shaft; and an end effector attached to the distal end of the shaft; wherein the shaft comprises a flexible portion extending distally from the proximal end of the shaft, and an articulating portion extending proximally from the distal end of the shaft, and wherein the articulating portion comprises a flexible spine; wherein a plurality of articulation cables extend through the shaft from the handle to the flexible spine, such that when tension is applied to at least one of the plurality of articulation cables, the flexible spine bends; wherein a rotatable element extends through the shaft from the handle to the end effector, such that when the rotatable element is rotated, the end effector rotates; and
  • apparatus for performing a minimally-invasive procedure comprising: a tool comprising: a shaft having a distal end and a proximal end; a handle attached to the proximal end of the shaft; and an end effector attached to the distal end of the shaft; wherein the shaft comprises a flexible portion extending distally from the proximal end of the shaft, and an articulating portion extending proximally from the distal end of the shaft, and wherein the articulating portion comprises a flexible spine; wherein a plurality of articulation cables extend through the shaft from the handle to the flexible spine, such that when tension is applied to at least one of the plurality of articulation cables, the flexible spine bends; wherein a rotatable element extends through the shaft from the handle to the end effector, such that when the rotatable element is rotated, the end effector rotates; and wherein an actuation element extends through the shaft from the handle to the end effector
  • a method for performing a minimally-invasive procedure comprising: obtaining apparatus for performing a minimally-invasive procedure, the apparatus comprising: a tool comprising: a shaft having a distal end and a proximal end; a handle attached to the proximal end of the shaft; and an end effector attached to the distal end of the shaft; wherein the shaft comprises a flexible portion extending distally from the proximal end of the shaft, and an articulating portion extending proximally from the distal end of the shaft, and wherein the articulating portion comprises a flexible spine; wherein a plurality of articulation cables extend through the shaft from the handle to the flexible spine, such that when tension is applied to at least one of the plurality of articulation cables, the flexible spine bends; wherein a rotatable element extends through the shaft from the handle to the end effector, such that when the rotatable element is rotated, the end effector rotates; and
  • apparatus for performing a minimally-invasive procedure comprising: a shaft having a distal end and a proximal end; a handle attached to the proximal end of the shaft; and an end effector attached to the distal end of the shaft; wherein the shaft comprises a flexible portion, a first articulating portion and a second articulating portion, wherein the flexible portion extends distally from the handle, the first articulating portion extends distally from the flexible portion, and the second articulating portion extends distally from the first articulating portion; wherein at least one articulation cable extends from the handle to the first articulating portion, such that when tension is applied to the at least one articulation cable, the first articulating portion deflects; wherein a plurality of articulation cables extend from the handle to the second articulating portion, such that when tension is applied to at least one of the plurality of articulation cables, the second articulating portion deflects.
  • a method for performing a minimally-invasive procedure comprising: providing apparatus for performing a minimally-invasive procedure, the apparatus comprising: a shaft having a distal end and a proximal end; a handle attached to the proximal end of the shaft; and an end effector attached to the distal end of the shaft; wherein the shaft comprises a flexible portion, a first articulating portion and a second articulating portion, wherein the flexible portion extends distally from the handle, the first articulating portion extends distally from the flexible portion, and the second articulating portion extends distally from the first articulating portion; wherein at least one articulation cable extends from the handle to the first articulating portion, such that when tension is applied to the at least one articulation cable, the first articulating portion deflects; wherein a plurality of articulation cables extend from the handle to the second articulating portion, such that when tension is applied to at least one of the pluralit
  • Fig. 1 is a schematic view showing a novel medical instrument formed in accordance with the present invention
  • Fig. 1A is a schematic view showing the handle and proximal end of the shaft of the novel medical instrument shown in Fig. 1;
  • Fig. IB is a schematic view showing the distal end of the shaft and the end effector of the novel medical instrument shown in Fig. 1;
  • FIGs. 2-23 are schematic views showing further details of the shaft and the end effector of the novel medical instrument shown in Fig. 1;
  • Figs. 24-46B are schematic views showing further details of the handle and the proximal end of the shaft of the novel medical instrument shown in Fig. 1;
  • Figs. 47-55 are schematic views showing a novel tool support which may be used in conjunction with the novel medical instrument shown in Fig. 1;
  • Figs. 56-58F are schematic views showing another novel medical instrument formed in accordance with the present invention
  • Figs. 59-62 are schematic views showing another form of end effector for the novel medical instrument of the present invention.
  • Figs. 63-66 are schematic views showing another novel medical instrument formed in accordance with the present invention.
  • Figs. 67-72 are schematic views showing another novel medical instrument formed in accordance with the present invention.
  • Figs. 73 and 74 are schematic views showing another novel medical instrument formed in accordance with the present invention
  • Figs. 75 and 76 are schematic views showing another novel medical instrument formed in accordance with the present invention
  • Figs. 77-80 are schematic views showing another novel medical instrument formed in accordance with the present invention.
  • Figs. 81-83, 83A and 84-87 are schematic views showing another novel medical instrument formed in accordance with the present invention.
  • the present invention comprises a novel medical instrument for performing minimally-invasive procedures.
  • the novel medical instrument is highly flexible, capable of articulating with a range of different motions, and configured for precise control, while being operated (e.g., along a tortuous path) from only the handle end of the medical instrument.
  • Novel medical instrument 5 formed in accordance with the present invention.
  • Novel medical instrument 5 generally comprises a handle 10 and a shaft 15 extending distally from handle 10.
  • Shaft 15 generally comprises an elongated, flexible proximal portion 20 and a distal articulating portion 25 which is mounted to the distal end of flexible proximal portion 20.
  • An end effector 30 is mounted to the distal end of distal articulating portion 25.
  • End effector 30 may take many different forms (e.g., graspers, injection needles, scissors, hot snares, monopolar probes, hemostasis clips, bipolar forceps, suction tubes, single-fire or multi-fire closure devices such as staplers and tackers, dissector forceps, retrieval baskets, monopolar scissors, light sources, cameras, etc.).
  • grasper e.g., graspers, injection needles, scissors, hot snares, monopolar probes, hemostasis clips, bipolar forceps, suction tubes, single-fire or multi-fire closure devices such as staplers and tackers, dissector forceps, retrieval baskets, monopolar scissors, light sources, cameras, etc.
  • end effector 30 is shown in the figures as a grasper.
  • Handle 10 may take any one of many different forms (e.g., a pistol grip, a shaft grip, etc.).
  • handle 10 is shown in the figures as a pistol grip.
  • flexible proximal portion 20 of shaft 15 is configured to be a highly flexible element capable of extending a significant length (e.g., 95 cm - 140 cm) along a tortuous path
  • distal articulating portion 25 of shaft 15 is configured to be capable of universal articulation relative to the distal end of flexible proximal portion 20 of shaft 15
  • end effector 30 is configured to be selectively rotated relative to the distal end of distal articulating portion 25 and may be selectively actuated, with all functions able to be carried out by a single hand of a user via handle 10.
  • substantially the entire shaft 15 of medical instrument 5 is flexible, with the portion of shaft 15 proximal to a transition point 32 (i.e., flexible proximal portion 20) being passively flexible (e.g., able to follow a tortuous path), and the portion of shaft 15 distal to transition point 32 (i.e., distal articulating portion 25) being actively flexible (e.g., able to be universally articulated to a desired configuration).
  • novel medical instrument 5 is capable of at least the following motions:
  • Motion 1 - longitudinal movement of end effector 30 by longitudinal movement of handle 10 (sometimes referred to herein as a “longitudinal motion function”);
  • Motion 2 - rotational movement of end effector 30 by rotational movement of handle 10 (sometimes referred to herein as a “torquing motion function”);
  • Motion 3 - articulating movement of end effector 30 relative to handle 10 by articulating distal articulating portion 25 of shaft 15 relative to the distal end of flexible proximal portion 20 of shaft 15 (sometimes referred to herein as a “universal articulation function”);
  • Motion 4 rotational movement of end effector 30 relative to the distal end of distal articulating portion 25 of shaft 15 by rotating end effector 30 relative to shaft 15 (sometimes referred to herein as a “roticulation function”);
  • Motion 5 - actuation of end effector 30, e.g., selectively moving elements of end effector 30 relative to one another so as to carry out a medical procedure, e.g., opening and closing the jaws of a grasper-type end effector (sometimes referred to herein as a “jaw open/close function”).
  • a medical procedure e.g., opening and closing the jaws of a grasper-type end effector (sometimes referred to herein as a “jaw open/close function”).
  • flexible proximal portion 20 of shaft 15 generally comprises an elongated flexible outer coil 35 (Figs. 2 and 3) having a distal end 40, a proximal end 45 and a lumen 50 extending therebetween.
  • Distal articulating portion 25 of shaft 15 is mounted to distal end 40 of outer coil 35 via intervening elements (see below).
  • Proximal end 45 of outer coil 35 is secured to a shaft adapter 55 which is, in turn, secured to handle 10 (see below).
  • Means for selectively articulating distal articulating portion 25 relative to the distal end of flexible proximal portion 20 (i.e., relative to distal end 40 of outer coil 35), means for selectively rotating end effector 30 relative to distal articulating portion 25, and means for selectively actuating end effector 30 extend through lumen 50 of outer coil 35, as will hereinafter be discussed in further detail.
  • a rigid tube 60 (Figs. 1A and 4) is provided at the proximal end of flexible proximal portion 20 (i.e., disposed about the proximal end 45 of outer coil 35 and secured to shaft adapter 55), whereby to provide a region of increased rigidity for mounting novel medical instrument 5 to a tool support (e.g., a table-mounted tool support) as will hereinafter be discussed in further detail.
  • rigid tube 60 may comprise a fillet 65 (Fig. 4) at the distal end of rigid tube 60 which provides a smooth transition between the outer surface of rigid tube 60 and the outer surface of the portion of flexible proximal portion 20 located distal to rigid tube 60.
  • distal articulating portion 25 is configured to selectively articulate relative to the distal end of flexible proximal portion 20.
  • distal articulating portion 25 generally comprises a distal articulation link assembly 70, a proximal articulation link assembly 75 and a flex spine 80 extending between distal articulation link assembly 70 and proximal articulation link assembly 75.
  • Proximal articulation link assembly 75 is configured to be mounted to the distal end of flexible proximal portion 20 of shaft 15 and to provide a counterforce surface to enable selective articulation of distal articulation link assembly 70 and flex spine 80, as will hereinafter be discussed in further detail.
  • proximal articulation link assembly 75 is disposed at the distal end 40 of outer coil 35 of flexible proximal portion 20.
  • the distal end of proximal articulation link assembly 75 provides a counterforce surface to enable selective flexing of distal articulation link assembly 70 and flex spine 80 relative to the distal end of flexible proximal portion 20 of shaft 15 (i.e., in order to effect universal articulation of distal articulating portion 25).
  • proximal articulation link assembly 75 (Fig. 6) comprises a body 85 having a pair of distally-extending fingers 90 which are configured to engage flex spine 80 (Fig. 5) as will hereinafter be discussed in further detail.
  • a plurality of bores 95 (Fig. 6), disposed about a central bore 100 (Fig. 18), are formed in body 85 and sized to receive a plurality of articulation cables (see below).
  • bores 95 may comprise counterbores (not shown) disposed at their proximal ends for receiving articulation cable housings as will hereinafter be discussed.
  • Central bore 100 (Fig. 18) may comprise a counterbore 102 (Figs. 6 and 18) disposed at its distal end for facilitating mounting of distal articulating link assembly 70 to body 85, as will hereinafter be discussed.
  • Body 85 of proximal articulation link assembly 75 bears against a plurality of articulation cable housings 235 (see below) which, in turn, bear against handle 10 in order for proximal articulation link assembly 75 to provide a counterforce surface for selective flexing of distal articulating portion 25 of shaft 15, as will hereinafter be discussed.
  • outer coil 35 is secured to body 85 of proximal articulation link assembly 75, but provides substantially no counterforce to body 85 - the counterforce to body 85 is provided by the articulation cable housings.
  • distal articulation link assembly 70 generally comprises a body 105 (Fig. 7) having a central opening 110 passing therethrough, and a short laser-cut hypotube 115 extending proximally therefrom.
  • Short laser-cut hypotube 115 comprises a distal end 120, a proximal end 125 and a lumen 130 extending therebetween.
  • Short laser-cut hypotube 115 is configured to be highly flexible, but with sufficient column strength, so as to permit selective articulation of body 105 relative to proximal articulation link assembly 75 when proximal end 125 of short laser-cut hypotube 115 bears against body 85 (Fig.
  • Proximal end 125 of short laser-cut hypotube 115 is mounted to body 85 of proximal articulation link assembly 75 (e.g., via welding).
  • Distal end 120 of short laser-cut hypotube 115 is mounted to body 105 (e.g., via welding), with lumen 130 of short laser-cut hypotube 115 being aligned with central opening 110 of body 105 when distal articulation link assembly 70 is in its relaxed (i.e., unbiased) condition.
  • Body 105 also comprises a pair of distal seats 135 (only one of which is shown in Fig. 7) for mounting one or more articulation cables to body 105, as will hereinafter be discussed in further detail.
  • Body 105 also comprises two proximally-extending fingers 137 for mating with flex spine 80 (Fig. 5), as will hereinafter be discussed in further detail.
  • flex spine 80 generally comprises a flexible body 140 having a distal end 141 and a proximal end 142.
  • a plurality of axially- aligned openings 145, and a central bore 150, extend between distal end 141 and proximal end 142. Openings 145 are sized to each receive an articulation cable therein as will hereinafter be discussed.
  • Central bore 150 is sized to receive short laser-cut hypotube 115 (Fig. 7) of distal articulation link assembly 70.
  • Proximal end 142 of flex spine 80 comprises proximal seats 155 for seating the aforementioned distally-extending fingers 90 (Fig.
  • flex spine 80 when flex spine 80 is mounted in this fashion, flex spine 80 is fixed against rotation relative to either distal articulation link assembly 70 or proximal articulation link assembly 75.
  • Rotatable Housing Assembly 165 Looking next at Figs. 5 and 8-12, the distal end of distal articulating portion 25 comprises a rotatable housing assembly 165 (Fig. 9) for rotatably mounting end effector 30 to distal articulation link assembly 70, as will hereinafter be discussed. More particularly, rotatable housing assembly 165 generally comprises a collar 170, a long laser-cut hypotube 180 having a distal end 185, a proximal end 190 and a lumen 195 extending therebetween. Rotatable housing assembly 165 also comprises a rotation connector 200 (Figs.
  • Rotation connector 200 and end effector mount 210 are rotatably mounted to body 105 of distal articulation link assembly 70 (Figs. 5 and 7) via collar 170 (Fig. 5). More particularly, rotation connector 200 (Fig. 9) is rotatably mounted to collar 170 and is able to rotate relative to collar 170. End effector mount 210 is mounted to rotation connector 200 and engages a distal shoulder 215 (Fig. 10) of rotation connector 200. Collar 170 is fixedly mounted to body 105 of distal articulation link assembly 75 (Fig. 7). Thus, end effector mount 210 (Fig.
  • End effector 30 may take many different forms (e.g., graspers, injection needles, scissors, hot snares, monopolar probes, hemostasis clips, bipolar forceps, suction tubes, single-fire or multi-fire closure devices such as staplers and tackers, dissector forceps, retrieval baskets, monopolar scissors, light sources, cameras, etc.). For clarity of illustration, end effector 30 is shown in the figures as a grasper.
  • end effector 30 is mounted to end effector mount 210. More particularly, in one preferred form of the invention, end effector 30 comprises a grasper having two opposed jaws 216, 217 which are pivotally mounted to end effector mount 210 via a pin 217A which passes through holes 217B in jaws 216, 217 and through holes
  • a clevis 218 is mounted to jaws 216, 217 via a pin 218A disposed in slots 218B formed in the proximal portions of jaws 216, 217 such that reciprocal movement of a pull wire mounted to clevis 218 (see below) causes the opposing jaws 216, 217 of the grasper to open and close relative to one another, as will hereinafter be discussed.
  • shaft 15 also comprises (i) means for selectively articulating distal articulating portion 25 (Fig. 2) relative to flexible proximal portion 20, (ii) means for selectively rotating rotatable housing assembly 165
  • shaft 15 generally comprises (i) four articulation cables 220 for selectively articulating distal articulating portion 25 relative to the distal end of flexible proximal portion 20,
  • an HHS coil 225 e.g., a hollow helical strand of the sort sold by Fort Wayne Metals of Fort Wayne, IN
  • a pull wire 230 for selectively actuating end effector 30.
  • articulation cables 220 run from handle 10 to distal seats 135 (Figs. 15 and 16) of distal articulation link assembly 70, with articulation cables 220 extending through bores 95 of body 85 (Fig. 6), through openings 145 of flex spine 80 (Fig. 5) to distal seats 135 of body 105 (Fig. 16).
  • Articulation cables 220 are preferably each slidably disposed within an articulation cable housing 235 (Fig. 13).
  • the distal ends 240 of articulation cable housings 235 are mounted to body 85 (Fig. 15) of proximal articulation link assembly 75 (i.e., via thread adjusters 330, as will hereinafter be discussed).
  • Articulation cable housings 235 bear against body 85 of proximal articulation link assembly 75 and provide a counterforce to body 85 for articulation of distal articulating portion 25 of shaft 15 relative to flexible proximal portion 25 of shaft 15. Articulation cable housings 235 also separate articulation cables 220 from one another and from HHS coil 225, and help ensure smooth sliding movement of articulation cables 220 within flexible proximal portion 20 of shaft 15 (i.e., over the distance between handle 10 and proximal articulation link assembly 75, which may be substantial in length (e.g., 95 cm - 140 cm) and follow a tortuous path when medical instrument 5 is disposed in a patient).
  • each bore 95 may comprise a counterbore (not shown) sized to receive the distal end 240 of a given articulation cable housing 235.
  • articulation cables 220 are attached (e.g., via welding, crimping, etc.) to distal seats 135 of body 105 of distal articulation link assembly 70.
  • two of the articulation cables 220 may be provided by a single length of cable, with that single length of cable having a tube 245 (Fig. 16) crimped thereto and with tube 245 being welded (or otherwise affixed) to a distal seat 135.
  • distal articulation link assembly 70 can be articulated laterally, whereby to articulate distal articulating portion 25 of shaft 15. Furthermore, by providing at least three articulation cables 220, with the three or more articulation cables being positioned about the perimeter of body 105, substantially universal articulation of distal articulation link assembly 70 can be achieved, whereby to provide substantially universal articulation for distal articulating portion 25 of shaft 15.
  • HHS coil 225 comprises a distal end 250 (Fig. 17), a proximal end 255 (Fig. 26) and a lumen 260 (Fig. 13) extending therebetween.
  • HHS coil 225 is preferably disposed within a flexible, friction-reducing sleeve 267 (Fig. 13). More particularly, HHS coil 225 preferably comprises a plurality of filars which are wound and swaged together so as to together form a hollow tubular structure.
  • HHS coil 225 may comprise a hollow helical strand of the sort sold by Fort Wayne Metals of Fort Wayne, IN.
  • HHS coil 225 comprises 10 filars which are wound and swaged together into a singular flexible structure. Distal end 250 (Fig. 17) of HHS coil 225 is mounted to long laser-cut hypotube 180 (Fig. 17) of rotatable housing assembly 165 (Fig. 9) via a sleeve (or crimp) 265 (Fig. 17), such that long laser-cut hypotube 180 (and hence end effector mount 210 carrying end effector 30) rotate when HHS coil 225 rotates.
  • end effector 30 can be adjusted by selectively rotating HHS coil 225, whereby to rotate long laser-cut hypotube 180 and hence end effector mount 210, to which end effector 30 is secured.
  • HHS coil 225 and long laser- cut hypotube 180 to transmit torque down shaft 15, any build-up of torqueing spring energy within the shaft is minimized, even when shaft 15 follows a tortuous path and distal articulating portion 25 has been articulated relative to the longitudinal axis of shaft 15.
  • pull wire 230 is provided for selectively actuating end effector 30.
  • the distal end of pull wire 230 (Fig. 19) is secured to clevis 218 of end effector 30, with clevis 218 being slidably mounted to jaws 216, 217 of end effector 30, and with jaws 216, 217 being pinned to end effector mount 210, such that reciprocal movement of pull wire 230 causes the opposing jaws 216, 217 of end effector 30 to open and close relative to one another.
  • body 85 (Fig. 18) of proximal articulation link assembly 75 (Fig. 6) is mounted to distal end 40 (Fig. 2) of flexible outer coil 35, with distal ends 240 (Fig. 15) of articulation cable housings 235 being mounted to body 85 of proximal articulation link assembly 75, and with articulation cables 220 passing through bores 95 (Fig. 6) formed in body 85.
  • Distal articulation link assembly 70 (Fig. 7) is mounted to proximal articulation link assembly 75 by mounting proximal end 125 of short laser-cut hypotube 115 in counterbore 102 (Fig. 6) of body 85.
  • Flexible body 140 (Fig. 5) of flex spine 80 is “sandwiched” between body 105 (Fig. 7) of distal articulation link assembly 70 and body 85 (Fig. 6) of proximal link assembly 75, with distally-extending fingers 90 of body 85 being disposed in proximal seats 155 (Fig. 5) of flex spine 80 and with proximally-extending fingers 137 of body 105 being disposed in distal seats 160 of flex spine 80.
  • Short laser-cut hypotube 115 (Fig. 7) of distal articulation link assembly 70 passes through central bore 150 (Fig. 5) of flexible body 140 of flex spine 80.
  • Long laser-cut hypotube 180 (Figs. 9, 10 and 17) of rotatable housing assembly 165 extends proximally through short laser-cut hypotube 115 (Fig. 18) such that the proximal end 190 (Fig. 17) of long laser-cut hypotube 180 passes through body 85 of proximal articulation link assembly 75 (i.e., by passing through counterbore 102 and central bore 100 of body 85) and is secured to HHS coil 225 (Fig. 17), e.g., via sleeve 265.
  • Rotation connector 200 (Figs. 9 and 10) is mounted to the distal end of long laser-cut hypotube 180. Rotation connector 200 is also mounted to end effector mount 210. End effector 30 is mounted to end effector mount 210.
  • Pull wire 230 extends distally through lumen 260 of HHS coil 225 (Figs. 13 and 14) and distally through lumen 195 (Fig. 9) of long laser-cut hypotube 180, exiting rotation connector 200.
  • the distal end of pull wire 230 is connected to end effector 30.
  • reciprocal movement of a pull wire 230 causes the opposing jaws 216, 217 (Fig. 8) of the grasper to open and close relative to one another.
  • Flexible proximal portion 20 of shaft 15 is preferably covered with a protective sleeve or outer covering (e.g., Pebax ® ) 270 (Figs. 18, 20 and 21), with the proximal end of protective sleeve or outer covering 270 being secured (e.g., bonded) to rigid tube 60 and with the distal end of protective sleeve or outer covering 270 being secured (e.g., bonded) to body 85 of proximal articulation link assembly 75, and distal articulating portion 25 of shaft 15 is preferably covered with a protective sleeve or outer covering 275 (Figs.
  • a protective sleeve or outer covering e.g., Pebax ®
  • proximal end of protective sleeve or outer covering 275 being secured to body 85 of proximal articulation link assembly 75 and with the distal end of protective sleeve or outer covering 275 extending up to and over the proximal portion of end effector 30, whereby to protect shaft 15 and permit easy insertion of shaft 15 into the body of a patient via a natural body orifice, a cannula, the lumen of another surgical instrument, etc.
  • the proximal end of shaft 15 is mounted to handle 10 (Fig. 1) such that articulation cables 220, HHS coil 225 and pull wire 230 may be selectively actuated using handle 10, as will hereinafter be discussed in further detail.
  • handle 10 generally comprises an internal cavity 280, an articulation control assembly 285 for selectively moving articulation cables 220 (and hence selectively articulating distal articulating portion 25 of shaft 15), a push rod lock assembly 290 for selectively locking articulation control assembly 285 in a desired position (and hence locking distal articulating portion 25 of shaft 15 in a selected position), a roticulation control assembly 295 for selectively rotating HHS coil 225 (and hence selectively rotating end effector 30), and a trigger assembly 300 for selectively actuating pull wire 230 (and hence selectively actuating end effector 30).
  • articulation control assembly 285 generally comprises a ball plate 305 (Fig. 28) fixedly mounted within internal cavity 280 of handle 10, a thumbstick ball assembly 310 configured to be selectively pivoted relative to ball plate 305, and a thumbstick 315 configured to be engaged by the thumb of a user.
  • Ball plate 305 comprises a plurality of threaded openings 320 (Fig. 28) and a center opening 325 for receiving pushrod lock assembly 290, as will hereinafter be discussed in further detail.
  • Threaded openings 320 are configured to receive a plurality of threaded adjusters 330 (Figs. 29 and 30) which are, in turn, mounted to the proximal ends (Figs. 21 and 30) of each articulation cable housing 235.
  • articulation cable housings 235 bear against ball plate 305 (which is, in turn, fixedly mounted to handle 10), such that articulation cable housings 235 can provide a counterforce to body 85 of proximal articulation link assembly 75 when articulation cables 220 are pulled proximally.
  • Each threaded adjuster 330 comprises a central lumen passing therethrough, such that an articulation cable 220 (Fig. 30) may pass through the threaded adjuster (and hence, through threaded openings 320 of ball plate 305) to be mounted to thumbstick ball assembly 310, as will hereinafter be discussed.
  • An enlargement 335 (Fig. 30)
  • Ball plate 305 also comprises a proximally-facing concave recess 340 (Fig. 29) for providing clearance to thumbstick ball assembly 310 which is pivotally seated within a seat 342 disposed within internal cavity 280 of handle 10, as will hereinafter be discussed in further detail.
  • Thumbstick ball assembly 310 comprises a hemispherical distal ball 345 (Fig. 32) and a hemispherical proximal ball 350.
  • Hemispherical distal ball 345 preferably has a maximum diameter (i.e., the diameter at its proximal end) which is greater than the maximum diameter of hemispherical distal ball 345 (i.e., the diameter at its distal end), whereby to provide a proximal circumferential seat 355 (Fig. 31) about the proximal end of hemispherical distal ball 345.
  • a plurality of openings (or grooves) 360 (Fig.
  • articulation cables 220 may be passed through openings (or grooves) 360 in proximal circumferential seat 355 as enlargements 335 seat on proximal circumferential seat 355.
  • articulation cables 220 may be selectively moved by selectively pivoting hemispherical distal ball 345 within its seat 342 inside internal cavity 280 of handle 10 (i.e., by selectively pivoting thumbstick 315, as will hereinafter be discussed in further detail).
  • Thumbstick 315 comprises a threaded stem 362 (Fig. 33) and a thumb seat 363.
  • the distal end of threaded stem 362 secures hemispherical proximal ball 350 to hemispherical distal ball 345.
  • Thumb seat 363 is secured to the proximal end of threaded stem 362.
  • thumbstick 315 can be used to selectively move hemispherical distal ball 345, whereby to selectively move articulation cables 220, whereby to selectively articulate distal articulating portion 25 of shaft 15 relative to flexible proximal portion 20 of shaft 15.
  • pushrod lock assembly 290 generally comprises an actuation lever 365 (Fig. 33), a cam 370 mounted to actuation lever 365, and a pushrod lock assembly plate 375 having a pushrod 380 mounted thereto and extending proximally therefrom.
  • Pushrod 380 is preferably disposed within a sleeve 385.
  • a spring 390 (Fig. 35) is disposed over sleeve 385 so as to bias pushrod lock assembly plate
  • Pushrod 380 is slidably disposed in center opening 325 (Fig. 28) of ball plate 305 and extends proximally therefrom toward thumbstick ball assembly 310 (Fig. 33).
  • Actuation lever 365 and cam 370 are rotatably mounted within cavity 280 of handle 10, with cam 370 contacting pushrod lock assembly plate 375 such that movement of actuation lever 365 cams pushrod lock assembly plate 375 (and hence pushrod 380) proximally against the power of spring 390, whereby to cause the free end of pushrod 380 to engage hemispherical distal ball 345, thereby locking thumbstick ball assembly 310 against movement.
  • pushrod lock assembly 290 can be used to selectively lock thumbstick ball assembly 310 in a desired position, whereby to selectively lock distal articulating portion 25 of shaft 15 in a desired (e.g., articulated) configuration.
  • roticulation control assembly 295 generally comprises a roticulation knob 395 (Figs. 37 and 38) having a keyway 400 (Fig.
  • Roticulation key 405 comprises a distal end 406, a proximal end 407 and a lumen 408 extending therebetween.
  • HHS coil 225 is received within lumen 408 of roticulation key 405 and is secured to roticulation key 405 such that rotation of roticulation key 405 effects rotation of HHS coil 225.
  • HHS coil 225 is secured to long laser-cut hypotube 180, and long laser-cut hypotube 180 is secured to end effector mount 210, such that rotation of HHS coil 225 causes rotation of long laser-cut hypotube 180 which causes rotation of end effector mount 210 (and hence rotation of end effector 30).
  • Distal end 406 of rotaticulation key 405 is received in key way 400 of roticulation knob 395 such that roticulation key 405 is engaged by roticulation knob 395 and rotates when roticulation knob 395 rotates.
  • rotation of roticulation knob 395 causes rotation of roticulation key 405 which causes rotation of HHS coil 225 and hence rotation of end effector 30.
  • keyway 400 of roticulation knob 395 comprises a non-circular cross-sectional profile which matches the non-circular cross-sectional profile of distal end 406 of roticulation key 405.
  • Roticulation knob 395 is rotatably mounted within cavity 280 of handle 10 such that a portion of roticulation knob 395 protrudes out of handle 10 (Fig. 37), whereby to permit roticulation knob 395 to be selectively rotated by a user.
  • Pull wire 230 (Fig. 40), which is disposed within HHS coil 225, extends through roticulation key 405 and is selectively actuated using trigger assembly 300 (Fig. 25), as will hereinafter be discussed.
  • Proximal end 407 of roticulation key 405 extends out of roticulation knob 395 (Fig. 39).
  • proximal end 407 (Fig. 38) of roticulation key 405 comprises a plurality of teeth 409 for releasably engaging a ball nose spring plunger 410 (Fig. 41).
  • Ball nose spring plunger 410 is mounted within cavity 280 of handle 10 such that ball nose spring plunger 410 releasably engages teeth 409 disposed on proximal end 407 of roticulation key 405.
  • ball nose spring plunger 410 By virtue of the engagement between ball nose spring plunger 410 and roticulation key 405, roticulation key 405 (and hence HHS coil 225 which is mounted to roticulation key 405) are prevented from “spontaneously” rotating absent deliberate rotation of roticulation knob 395.
  • ball nose spring plunger 410 prevents accumulated spring tension (e.g., spring tension which can build up when rotating HHS coil 225 using roticulation knob 395) from “unraveling” HHS coil 225 and thereby causing unintentional rotation of HHS coil 225 (and hence unintentional rotation of end effector 30).
  • trigger assembly 300 generally comprises a trigger 415 pivotally mounted to handle 10, a sled 420 (Fig. 43) movably disposed within cavity 280 of handle 10, and one or more lever arms 425 which connect trigger 415 to sled 420 such that when trigger 415 is actuated (i.e., pulled), sled 420 moves proximally within cavity 280 of handle 10, whereby to move pull wire 230 proximally, whereby to actuate end effector 30, as will hereinafter be discussed in further detail.
  • sled 420 comprises a cavity 430 (Fig. 45), a distal bushing 435 (Fig. 46) disposed within cavity 430, a proximal bushing 440 disposed within cavity 430, and a spring 445 disposed between distal bushing 435 and proximal bushing 440.
  • An inner support tube 450 is secured to pull wire 230 (e.g., by a crimp sleeve 451 disposed at the proximal end of inner support tube 450).
  • An outer support tube 452 is disposed over the distal portion of inner support tube 450, with inner support tube 450 able to slide freely within outer support tube 452.
  • Outer support tube 452 also comprises an outer support tube collar 453 which is sized to be mounted within a seat 454 (Fig. 46B) formed in internal cavity 280 of handle 10.
  • a spring 455 (Fig. 42) is disposed in the proximal end of handle 10 so as to bias sled 420 distally.
  • proximal bushing 440 and crimp sleeve 451 also move proximally, whereby to move pull wire 230 proximally and thereby actuate end effector 30.
  • proximal bushing 440 and spring 445 act as a force limiter, with spring 445 yielding when the force on pull wire 230 exceeds a given level, whereby to cease applying a proximal force to pull wire 230.
  • spring 445 will compress, thereby allowing proximal bushing 440 and crimp sleeve 451 (and hence inner support tube 450 and pull wire 230) to remain stationary as sled 420 moves proximally. In this way trigger 415 can be pulled through a “full stroke” without the danger of breaking pull wire 230.
  • end effector 30 is reduced (e.g., where end effector 30 comprises a grasper, the jaws of the grasper are closed); shaft 15 is straightened; handle 10 is longitudinally advanced so as to longitudinally advance the distal end of medical instrument 5 through a portal and into the body (e.g., along a tortuous path); handle 10 is longitudinally advanced and/or rotated, and/or distal articulating portion 25 of shaft 15 is bent and/or end effector 30 is roticulated, so that end effector 30 appropriately addresses the target tissue at the internal site; end effector 30 is used to perform the desired procedure (e.g., where end effector 30 comprises a surgical grasper the jaws of the grasper are opened and closed to grasp tissue) at the internal site; and the distal end of medical instrument 5 is withdrawn from the body, e.g., handle 10 is longitudinally withdrawn through the portal (during which the handle may also be rotated, and/or dis
  • novel medical instrument 5 is capable of at least the following motions:
  • Motion 1 - longitudinal movement of end effector 30 by longitudinal movement of handle 10 (sometimes referred to herein as a “longitudinal motion function”);
  • Motion 2 rotational movement of end effector 30 by rotational movement of handle 10
  • Motion 3 - articulating movement of end effector 30 relative to handle 10 by articulating distal articulating portion 25 of shaft 15 relative to the distal end of flexible proximal portion 20 of shaft 15 (sometimes referred to herein as a “universal articulation function”);
  • Motion 5 - actuation of end effector 30, e.g., selectively moving elements of end effector 30 relative to one another so as to carry out a medical procedure, e.g., opening and closing the jaws of a grasper-type end effector (sometimes referred to herein as a “jaw open/close function”).
  • a medical procedure e.g., opening and closing the jaws of a grasper-type end effector (sometimes referred to herein as a “jaw open/close function”).
  • the medical instrument may be modified so as to provide less (or more) than the five aforementioned motions, e.g., the roticulation function may be eliminated, an additional rotational function such as selective rotation of shaft 15 may be added, etc.
  • Tool support 460 which may be used to support medical instrument 5.
  • Tool support 460 generally comprises a clamp 465 for mounting tool support 460 to a surgical table 466, an adjustable base 470 for mounting one or more medical instmment(s) 5 to tool support 460, and an adjustable arm 475 (Fig. 48) for adjustably mounting base 470 to clamp 465.
  • One or more instrument adapters 480 (Fig. 49) are mounted to base 470, whereby to permit mounting of one or more medical instmment(s) 5 to tool support 460 (i.e., by providing a support for handle 10 and/or rigid tube 60 at the proximal end of shaft 15), as will hereinafter be discussed in further detail.
  • Adjustable arm 475 preferably comprises one or more segments 490 (Fig.
  • instrument adapters 480 each comprise a mount 495 and a tube 500.
  • Mount 495 is pivotally mounted to base 470 (Fig. 49).
  • Tube 500 has a lumen 505 sized to receive the proximal end of shaft 15 of medical instrument 5 (i.e., rigid tube 60 located at the proximal end of shaft 15).
  • medical instrument 5 i.e., rigid tube 60 located at the proximal end of shaft 15.
  • lumen 505 may comprise a septum 515 for fluidically sealing tube 500 (and hence fluidically sealing tool chamber 485), and/or tube 500 may comprise an end cap 520 for fluidically sealing tube 500 (and hence, for fluidically sealing tool chamber 485).
  • base 470 of tool support 460 may comprise a plurality of pivots and/or arms, may be shaped in the form of an arc, and/or may comprise other geometries, etc., in order to accommodate the needs and/or preferences of the surgeon.
  • novel medical instrument 5 comprises a shaft 15 having a flexible proximal portion 20, a distal articulating portion 25 which can be selectively articulated relative to the distal end of flexible proximal portion 20, and an end effector 30 which can be selectively rotated relative to the distal end of distal articulating portion 25.
  • longitudinal movement of handle 10 can be used to move shaft 15 distally and proximally, whereby to move end effector 30 distally and proximally; rotational movement of handle 10 can be used to rotate shaft 15, whereby to rotate end effector 30; articulation control assembly 285 (Fig.
  • roticulation control assembly 295 can be used to rotate end effector 30
  • trigger assembly 300 can be used to actuate end effector 30.
  • a novel rotatable shaft adapter mechanism 525 may be provided between shaft 15 and handle 10, whereby to allow shaft 15 (i.e., both flexible proximal portion 20 and distal articulating portion 25) to be selectively rotated relative to handle 10.
  • rotatable shaft adapter mechanism 525 is mounted to the proximal end of shaft 15 (i.e., mounted to the proximal end of flexible proximal portion 20) and connects shaft 15 to handle 10. It should be appreciated that, in this form of the invention, rotatable shaft adapter mechanism 525 replaces the aforementioned shaft adapter 55 (where the aforementioned shaft adapter 55 was fixedly secured to handle 10 and fixedly secured to the proximal end of outer coil 35, and where rigid tube 60 was fixedly secured to shaft adapter 55). More particularly, in this form of the invention, shaft 15 is rotatably mounted to the distal end of handle 10 and selectively locked/unlocked from rotation via rotatable shaft adapter mechanism 525, as will hereinafter be discussed in further detail.
  • rigid tube 60 of shaft 15 comprises a flange 530 disposed around the proximalmost end of rigid tube 60.
  • Flange 530 is received within a corresponding groove 535 formed in the distal end of handle 10 (i.e., formed within cavity 280 of handle 10 near the distalmost end of handle 10), whereby to rotatably mount rigid tube 60 of shaft 15 to handle 10.
  • the proximal end of outer coil 35 is fixedly secured to rigid tube 60 (and the distal end of outer coil 35 is secured to body 85 of proximal articulation link assembly 75).
  • the outer circumference of the distalmost end of handle 10 comprises a plurality of keyways 540 (Fig.
  • keyways 540 and projections 542 may be reversed from the foregoing, i.e., keyways 540 may be formed on rotatable shaft adapter mechanism 525 and projections 542 may be formed on the distalmost end of handle 10.
  • Rotatable shaft adapter mechanism 525 generally comprises a shaft rotation knob 545 having a lumen 550 extending therethrough.
  • Lumen 550 comprises a distal end 555, a proximal end 560 and an annular shoulder 565 disposed therebetween.
  • a spring 570 is disposed within distal end 555 of lumen 550, extending between annular shoulder 565 and the proximal end 575 of a retaining cap 580 (Figs. 58, 58 A, 58B, 58C and 58D) which is mounted circumferentially about the outer perimeter of shaft 15, whereby to bias shaft rotation knob 545 proximally, so that projections 542 of shaft adapter mechanism
  • retaining cap 580 comprises a pair of flats 585 which key to corresponding flats 590 formed on the outer surface of rigid tube 60 of shaft 15.
  • One or more spring fingers 591 engage a groove 592 on the outer surface of rigid tube 60, whereby to lock retaining cap 580 to rigid tube 60.
  • Retaining cap 580 also comprises a plurality of key features 593 sized to be received in corresponding keyways 594 of shaft rotation knob 545.
  • rotation knob 545 is able to slide longitudinally (distally or proximally) relative to rigid tube 60 of shaft 15, however, rotation knob 545 is locked against rotation relative to rigid tube 60 (and hence, relative to shaft 15). Therefore, rotation knob 545 can be moved longitudinally without causing longitudinal motion of rigid tube 60 and shaft 15, but rotation of rotation knob 545 will be transferred to rigid tube 60 (and to shaft 15 as will hereinafter be discussed).
  • Shaft rotation knob 545 is connected to rigid tube 60 of shaft 15 (e.g., via projections, a friction fit, etc.) so that shaft rotation knob 545 is longitudinally movable relative to rigid tube 60 but rotationally fixed to rigid tube 60.
  • the proximal end of protective sleeve or outer covering (e.g., Pebax ® ) 270 is secured (e.g., bonded) to rigid tube 60 and the distal end of protective sleeve or outer covering 270 is secured (e.g., bonded) to body 85 of proximal articulation link assembly 75.
  • protective sleeve or outer covering 270 is capable of transmitting torque between rigid tube 60 and body 85 of proximal articulation link assembly 75.
  • spring 570 normally biases shaft rotation knob 545 proximally, whereby to cause projections 542 to engage keyways 540 and lock shaft 15 against rotation relative to handle 10.
  • shaft rotation knob 545 is moved distally, against the power of spring 570, projections 542 disengage from keyways 540, thereby allowing shaft rotation knob 545 to be selectively rotated relative to handle 10, whereby to selectively rotate rigid tube 60 relative to handle 10, whereby to selectively rotate protective sleeve or outer covering 270 relative to handle 10, whereby to selectively rotate body 85 of proximal articulation link assembly 75, whereby to selectively rotate distal articulating portion 25 of shaft 15 relative to handle 10.
  • shaft rotation knob 545 When shaft 15 has been rotated to the desired position relative to handle 10, shaft rotation knob 545 is released and shaft rotation knob 545 moves proximally under the power of spring 570 such that projections 542 re-engage key ways 540, thereby locking shaft 15 against further rotation relative to handle 10.
  • rigid tube 60 is rotatable relative to handle 10 but longitudinally fixed relative to handle 10;
  • shaft rotation knob 545 is connected to rigid tube 60 such that shaft rotation knob 545 can be moved longitudinally relative to rigid tube 60 but not rotationally relative to rigid tube 60, such that shaft rotation knob 545 can be selectively locked to, or unlocked from, handle 10 so as to permit shaft rotation knob 545 to selectively rotate rigid tube 60;
  • protective sleeve or outer covering 270 transmits torque between rigid tube 60 and body 85 of proximal articulation link assembly 75, such that rotation of rigid tube 60 causes rotation of body 85 of proximal articulation link assembly 75, whereby to rotate distal articulating portion 25 of shaft 15 relative to handle 10.
  • rigid tube 60 of shaft 15 preferably comprises a groove 595 extending partially circumferentially about the outer surface of shaft 15. Groove 595 is disposed just distal to the proximal end of shaft 15 and extends partially, but not entirely, around the circumference of shaft 15. A corresponding boss 596 is formed on the distal end of handle 10 and received within groove 595. As a result of this construction, shaft 15 can be rotated only until boss 596 reaches one end of groove 595. In a preferred form of the present invention, groove 580 is sized so that shaft 15 can be rotated up to 350 degrees.
  • medical instrument 5 comprising a handle, an elongated flexible shaft and an end effector disposed at the distal end of the shaft configured for performing a medical procedure. It should be appreciated that medical instrument 5 may be modified in a variety of ways in order to support different types of end effectors, to facilitate single - handed use of medical instrument 5, to enhance the functionality of medical instrument 5, etc.
  • end effector 30 comprises a surgical grasper having two opposed jaws 216, 217 (Fig.
  • end effector 30 comprises scissors 600 having opposing blades 605, 610.
  • Blades 605, 610 comprise sharp edges that contact one another in order to facilitate cutting (e.g., of tissue, suture, etc.) when blades 605, 610 are brought together (i.e., closed).
  • a beveled washer 615 (Figs. 61 and 62) is disposed between one of the blades 605, 610 and the inner wall of end effector mount 210.
  • Beveled washer 615 is preferably disposed over the pin 217A which pivotally mounts blades 605, 610 to end effector mount 210. By mounting beveled washer 615 in this manner, blades 605, 610 are kept in tight engagement as they are brought together (i.e., closed), whereby to facilitate clean cutting (e.g., of tissue, of suture, etc.).
  • shaft 15 is rotatably mounted to the distal end of handle 10 and can be selectively rotated using rotatable shaft adapter mechanism 525 (Figs. 56-58 and 58A-58F).
  • rotatable shaft adapter mechanism 525 Figs. 56-58 and 58A-58F.
  • the proximal end of shaft 15 is rotationally mounted to the distal end of handle 10 (e.g., by means of the aforementioned flange 530 (Fig.
  • rotatable shaft adapter mechanism 525 is moved distally (i.e., pushed distally by the user against the power of spring 570) in order to “unlock” shaft 15 (i.e., to allow shaft rotation knob 545, and hence shaft 15, to rotate).
  • a user can then rotate shaft 15 as desired (i.e., by rotating rotatable shaft adapter mechanism 525, and hence rotating shaft 15).
  • shaft adapter mechanism 525 is released and automatically moves proximally (i.e., under the power of spring 570) so as to “lock” shaft 15 against further rotation. This action typically requires that the user use one hand to push rotatable shaft adapter mechanism 525 distally (and thereafter rotate shaft 15) while the user uses their other hand to keep handle 10 stationary.
  • shaft 15 is kept stationary (e.g., via friction between the outer surface of shaft 15 and the interior of a tool channel (e.g., tool channel 485 (Fig. 48), the lumen of a tool channel provided in another medical instrument such as an endoscope, etc.), handle 10 is selectively rotationally de-coupled from shaft 15, and handle 10 is selectively rotated by a user to a desired rotational position using a single hand. Handle 10 is then rotationally re-coupled to shaft 15 and then rotated by the user (whereby to also rotate shaft 15).
  • a tool channel e.g., tool channel 485 (Fig. 48), the lumen of a tool channel provided in another medical instrument such as an endoscope, etc.
  • Shaft rotation finger slide assembly 625 generally comprises a finger slide mechanism 630 which is slidably disposed within handle 10, and a shaft collar 635 which is fixedly mounted to the proximal end of shaft 15 (e.g., fixedly mounted to rigid tube 60).
  • Finger slide mechanism 630 comprises a saddle 640 having a pair of projections 645 extending through corresponding slots (not shown) formed in the side wall of handle 10. A pair of finger slides 647 are secured to projections 645.
  • a post 650 extends distally from saddle 640 and is configured to selectively lock shaft collar 635 against rotation, as will hereinafter be discussed in further detail.
  • a spring 655 biases saddle 640 (and hence post 650) distally, such that post 650 engages shaft collar 635 when finger slide mechanism 630 is in its resting state, as will hereinafter be discussed in further detail.
  • Shaft collar 635 is fixedly mounted to the proximal end of shaft 15 (e.g., to rigid tube 60).
  • Shaft collar 635 comprises a distal end 660, a proximal end 665 and a lumen 670 extending therebetween.
  • a plurality of teeth 675 are disposed about the inside perimeter of lumen 670 at proximal end 665 of shaft collar 635, with teeth 675 being spaced such that post 650 of finger slide mechanism 630 can be received within the gap between a pair of adjacent teeth 675, whereby to lock shaft collar 635 (and hence shaft 15) against rotation, as will hereinafter be discussed in further detail.
  • shaft 15 When a user desires to rotate shaft 15, the user moves finger slides 647 proximally, whereby to move projections 645 proximally, whereby to move saddle 640 proximally against the power of spring 655. As this occurs, post 650 is also moved proximally, whereby to disengage post 650 from teeth 675 of shaft collar 635 (and thereby rotationally de-couple handle 10 from shaft 15). While holding projections 645 proximally, the user can then rotate handle 10 as desired relative to shaft 15. Shaft 15 does not rotate as handle 10 is rotated (i.e., shaft 15 is maintained stationary by virtue of friction between the outer surface of shaft 15 and the interior of the lumen that shaft 15 is disposed in, e.g., tool channel 485).
  • a user desires to rotate shaft 15 clockwise 90 degrees
  • the user can rotationally de-couple shaft 15 from handle 10 in the manner discussed above, rotate handle 10 counterclockwise 90 degrees (e.g., rotate the grip of handle 10 from the “6 o’clock” position to the “3 o’clock” position), re-couple shaft 15 to handle 10 in the manner discussed above, and then rotate handle 10 (and hence shaft 15) clockwise 90 degrees (e.g., rotate the grip of handle 10 from the “3 o’clock” position to the “6 o’clock” position).
  • articulation control assembly 285 comprises thumbstick ball assembly 310, which is configured to selectively pull one or more of four articulation cables 220 proximally, whereby to allow selective universal articulation of distal articulating portion 25 of shaft 15 relative to flexible proximal portion 20 of shaft 15 via movement of thumbstick ball assembly 310.
  • thumbstick ball assembly 310 which is configured to selectively pull one or more of four articulation cables 220 proximally, whereby to allow selective universal articulation of distal articulating portion 25 of shaft 15 relative to flexible proximal portion 20 of shaft 15 via movement of thumbstick ball assembly 310.
  • thumbstick ball assembly 310 which is configured to selectively pull one or more of four articulation cables 220 proximally, whereby to allow selective universal articulation of distal articulating portion 25 of shaft 15 relative to flexible proximal portion 20 of shaft 15 via movement of thumbstick ball assembly 310.
  • an articulation control assembly 680 which is similar to the articulation control assembly 285 discussed above, but which is configured to provide single-plane articulation, as will hereinafter be discussed in further detail.
  • articulation control assembly 680 comprises a rocker 685 pivotally mounted within internal cavity 280 of handle 10.
  • Rocker 685 may be pivotally mounted within internal cavity 280 via an appropriately-formed seat disposed within internal cavity 280 of handle 10 or by other means (e.g., a pivot pin).
  • a thumb lever 690 is mounted to rocker 685 and extends proximally through a slot 695 formed in the housing of handle 10 (Fig. 69).
  • a wedge-shaped thumb rest 700 is preferably mounted to the free end of thumb lever 690.
  • two articulation cables 220 (not shown) are mounted to rocker 685 (e.g., by mounting the proximal ends of articulation cables 220 within diametrically-opposed slots 705 formed on rocker 685).
  • pull wire 230 is disposed within lumen 260 of HHS coil 225 and is able to slide freely relative to HHS coil 225 in order to selectively actuate end effector 30 (i.e., when a user pulls trigger 415 of handle 10, whereby to move pull wire 230 proximally).
  • HHS coil 225 can sometimes longitudinally compress (i.e., longitudinally shorten) while pull wire 230 does not longitudinally compress (i.e., longitudinally shorten).
  • pull wire 230 needs to be moved a further distance proximally in order to actuate end effector 30.
  • further proximal movement of pull wire 230 may not be possible if trigger 415 has reached the end of its “throw” (i.e., if trigger 415 cannot be pulled further).
  • a flat wound coil 710 which is wound around HHS coil 225.
  • Flat wound coil 710 is welded to distal end 250 of HHS coil 225 and is welded to proximal end 255 of HHS coil 225.
  • Coil 710 rotates with HHS coil 225 and provides support to HHS coil 225, whereby to minimize longitudinal compression of HHS coil 225.
  • HHS coil 225 does not compress longitudinally (i.e., HHS coil 225 does not shorten) when shaft 15 is disposed along a tortuous path.
  • end effector 30 may be pivotally mounted within end effector mount 210 via a pin 217A passing through the end effector and jaws 216, 217 of the grasper.
  • end effector 30 comprises scissors. More particularly, in this form of the invention, end effector 30 comprises a first blade 715 having a distal end 720 and a proximal end 725, and a second blade 730 having a distal end 735 and a proximal end 740. First blade 715 and second blade 730 are pivotally mounted to one another and to end effector mount 210 via a pin 745.
  • first blade 715 and second blade 730 are opened (i.e., to receive tissue, suture, etc. that is to be cut), proximal end 725 of first blade 715, and proximal end 740 of second blade 730, project laterally out of end effector mount 210 (Fig. 73). It has been found that proximal ends 725, 740 can present a sharp surface which can damage surrounding equipment and/or the anatomy when end effector 30 is used in a surgical procedure, particularly when end effector 30 is rotated at a surgical site while blades 715, 730 are in their opened position. To eliminate this issue, a cover 750 may be provided which covers the proximal portion of end effector mount 210.
  • cover 750 is formed out of an electrically-insulating material so that cover 750 also provides electrical insulation. This can be advantageous where end effector 30 comprises monopolar scissors, etc.
  • trigger 415 (Fig. 25) is pivotally mounted to handle 10 and may be selectively pulled by a user in order to selectively actuate end effector 30.
  • trigger 415 is shown in Fig. 25 as a traditional “pistol type” trigger
  • handle 10 is shown as comprising a traditional “pistol type” grip.
  • additional stabilization elements on handle 10 e.g., to facilitate single-handed use of medical instrument 5
  • to provide a trigger having a longer throw i.e., an increased arc of movement
  • a handle 10 comprises a “pinky” stabilizer ring 755 for receiving the “pinky” finger of a user and a “shepard’s hook”-type trigger 760 for providing greater leverage and superior ergonomics to a user.
  • This construction facilitates a better single-handed grip of handle 10 by a user and also allows a user to easily move trigger 415 proximally or distally (e.g., to pull or push pull wire 230 in order to selectively close/open the jaws of a grasper, etc.)
  • an electrical connection port e.g., a “banana jack” 765 disposed on the proximal end of the grip of handle 10 for connection to an external power supply (not shown), and a wire 770 (Fig. 79) disposed within internal cavity 280 of handle 10 for routing electrical power from electrical connection port 765 to a flat conductive spring 775 disposed within handle 10 (Fig. 80).
  • Flat conductive spring 775 contacts the plurality of teeth 409 disposed on roticulation key 405, whereby to make electrical contact with roticulation key 405 and hence HHS coil 225 and/or pull wire 230 via roticulation key 405.
  • ball nose spring plunger 410 is preferably omitted (i.e., it is replaced by flat conductive spring 775).
  • roticulation key 405 (and teeth 409 of roticulation key 405) are formed out of an electrically-conductive material (e.g., metal), as is long laser-cut hypotube 180, rotation connector 200 and end effector mount 210.
  • electrical power can pass from an external power supply (not shown) to electrical connection port 765, along wire 770 to flat conductive spring 775, from conductive spring 775 to roticulation key 405, and then to HHS coil 225 (and also to pull wire 230), along HHS coil 225 (and pull wire 230) through flexible proximal portion 20 of shaft 15, through sleeve (or crimp) 265 to long laser-cut hypotube 180, along long laser-cut hypotube 180 (and pull wire 230) through distal articulating portion 25 of shaft 15, to rotation connector 200 and end effector mount 210, and from end effector mount 210 to end effector 30.
  • monopolar power can be supplied to end effector 30.
  • novel medical instrument 5 generally comprises a shaft 15 having a flexible proximal portion 20, a distal articulating portion 25 configured to be selectively articulated relative to the distal end of flexible proximal portion 20, and an end effector 30 configured to be selectively rotated relative to the distal end of distal articulating portion 25.
  • longitudinal movement of handle 10 can be used to selectively move shaft 15 distally or proximally, whereby to move end effector 30 distally or proximally; rotational movement of handle 10 can be used to rotate shaft 15 (and hence, to also rotate end effector 30); articulation control assembly 285 (Fig.
  • roticulation control assembly 295 can be used to selectively rotate end effector 30 relative to distal articulating portion 25 of shaft 15
  • trigger assembly 300 can be used to selectively actuate end effector 30. It should be appreciated that, in this form of the invention, flexible proximal portion 20 of shaft 15 rotates as a unit together with handle 10.
  • novel medical instrument 5 may further comprise a rotatable shaft adapter mechanism 525 actuated with a rotation knob 545 (Figs. 56-58) which can be selectively rotated so as to allow shaft 15 (i.e., both flexible proximal portion 20 and distal articulating portion 25) to be selectively rotated relative to handle 10.
  • shaft 15 of novel medical instrument is constrained by the anatomy and is forced to deflect along the outer curve of the bend in the colon (or other anatomical structure), thereby making it difficult for end effector 30 to be aligned with, and grasp tissue disposed along, the corresponding inner curve of the bend in the colon (or other anatomical structure).
  • end effector 30 there is a need for a medical instrument that permits a greater degree of articulation and hence greater options for addressing the anatomy with end effector 30.
  • novel medical instrument 5 further comprises an intermediate articulating portion 800 disposed between the distal end of flexible proximal portion 20 and the proximal end of distal articulating portion 25.
  • Intermediate articulating portion 800 can be articulated in a single plane (e.g., in a manner analogous to the human “elbow” joint) in order to provide another degree of articulation to the distal articulating end portion of medical instrument 5, as will hereinafter be discussed in further detail.
  • This additional degree of articulation is sometimes hereinafter referred to as a “gross articulation function”.
  • novel medical instrument 5 is capable of at least the following motions:
  • Motion 1 - longitudinal movement of end effector 30 by longitudinal movement of handle 10 (sometimes referred to herein as a “longitudinal motion function”);
  • Motion 2 - rotational movement of end effector 30 by rotational movement of handle 10 (sometimes referred to herein as a “torquing motion function”);
  • Motion 5 - actuation of end effector 30, e.g., selectively moving elements of end effector 30 relative to one another so as to carry out a medical procedure, e.g., opening and closing the jaws of a grasper-type end effector (sometimes referred to herein as a “jaw open/close function”);
  • Motion 6 rotation of shaft 15 independently of handle 10, e.g., selectively rotating rotation knob 545 of rotatable shaft adapter mechanism 525 to allow shaft 15 (and hence flexible proximal portion 20, intermediate articulating portion 800 and distal articulating portion 25) to be selectively rotated relative to handle 10; and Motion 7 - articulating movement of distal articulating portion 25 and end effector 30 relative to flexible proximal portion 20 of shaft 15 by articulating intermediate articulating portion 800 of shaft 15 relative to the distal end of flexible proximal portion 20 of shaft 15 (sometimes referred to herein as a “gross articulation function”).
  • novel medical instrument 5 comprises (i) the four aforementioned articulation cables 220 for selectively articulating distal articulating portion 25 relative to the distal end of flexible proximal portion 20,
  • intermediate articulating portion 800 generally comprises a flex spine 810 (e.g., a laser-cut hypotube) having a proximal end 815, a distal end 820, and a central cavity 825 disposed therebetween.
  • Proximal end 815 of intermediate articulating portion 800 is mounted (e.g., welded, crimping, etc.) to distal end 40 of flexible outer coil 35, and distal end 820 of intermediate articulating portion 800 is mounted (e.g., welded, crimping, etc.) to proximal articulation link assembly 75.
  • Gross articulation cable 805 runs from distal end 820 of flex spine 810 to handle 10.
  • the distal end of gross articulation cable 805 comprises a crimp (not shown), which is welded to the distal end of gross articulation cable 805, which is, in turn, mounted to (e.g. welded to) the inside surface of flex spine 810 proximate distal end 820 of flex spine 810.
  • the proximal end of gross articulation cable 805 is attached to a control assembly within handle 10, as will be discussed in further detail below.
  • the portion of gross articulation cable 805 which extends between distal end 820 of flex spine 810 and proximal end 815 of flex spine 810 is slidably disposed within a gross articulation cable conduit 830 which is disposed within cavity 825 of flex spine 810.
  • the portion of gross articulation cable 805 which extends from distal end 40 of flexible outer coil 35, through flexible proximal portion 20 and through shaft 15 to handle 10 is slidably disposed within an articulation cable housing 235.
  • Gross articulation cable conduit 830 is welded to proximal end 815 of flex spine 810, and articulation cable housing 235 is welded to flexible outer coil 35 of shaft 15, but gross articulation cable conduit 830 is not connected to articulation cable housing 235.
  • Gross articulation cable conduit 830 and articulation cable housing 235 separate gross articulation cable 805 from articulation cables 220/articulation cable housings 235, and from HHS coil 225/torque liner 267, whereby to ensure smooth sliding movement of gross articulation cable 805 within intermediate articulating portion 800, flexible proximal portion 20 and shaft 15 (i.e., over the distance between distal end 820 of flex spine 810 and handle 10, which may be substantial in length (e.g., 95 cm - 140 cm) and which often follows a tortuous path when medical instrument 5 is disposed in a patient).
  • Gross articulation cable conduit 830 is constructed so as to be more compressible than articulation cable housing 235 so as to ensure that flex spine 810 can deflect to a desired angle.
  • gross articulation cable conduit 830 comprises a coiled spring such that proximal movement of gross articulation cable 805 causes flex spine 810 to articulate relative to distal end 40 of flexible outer coil 35 while allowing gross articulation cable conduit 830 to compress along its longitudinal dimension.
  • intermediate articulating portion 800 can only be articulated in a single plane.
  • additional gross articulation cables 805 may be provided if articulation in additional planes is desired, as will be apparent to one skilled in the art in view of the present disclosure.
  • Figs. 81 and 84-87 a preferred mechanism for selectively moving gross articulation cable 805 is shown.
  • handle 10 generally comprises an internal cavity 280, an articulation control assembly 285 for selectively moving articulation cables 220 (and hence selectively articulating distal articulating portion 25 of shaft 15), a push rod lock assembly 290 for selectively locking articulation control assembly 285 in a desired position (and hence locking distal articulating portion 25 of shaft 15 in a selected position), a roticulation control assembly 295 for selectively rotating HHS coil 225 (and hence selectively rotating end effector 30), a trigger assembly 300 for selectively actuating pull wire 230 (and hence selectively actuating end effector 30), and a rotatable shaft adapter mechanism 525 for selectively rotating shaft 15 (i.e., flexible proximal portion 20, intermediate articulating portion 800 and distal articulating portion 25) relative to handle 10.
  • a push rod lock assembly 290 for selectively locking articulation control assembly 285 in a desired position (and hence locking distal articulating portion 25 of shaft 15 in a selected position)
  • handle 10 is also provided with a gross articulation control assembly 835 for selectively moving gross articulation cable 805 proximally or distally (and hence selectively articulating flex spine 810 of intermediate articulating portion 800 of shaft 15 relative to flexible proximal portion 20 of shaft 15).
  • Gross articulation control assembly 835 generally comprises a spindle housing 840 fixedly mounted within internal cavity 280 of handle 10, a spindle 845 configured to be selectively rotated within spindle housing 840, and a knob 850 configured to be engaged by a user.
  • Cable housing 235 for gross articulation cable 805 preferably terminates at the proximal end of shaft 15, however, if desired, cable housing 235 for gross articulation cable 805 may extend into internal cavity 280 of handle 10 and terminate at the outer wall of spindle housing 840.
  • knob 850 when knob 850 is rotated in a first direction, the proximal end of gross articulation cable 805 is pulled proximally, whereby to selectively articulate flex spine 810 of intermediate articulating portion 800 of shaft 15 from a straight configuration to an articulated configuration (relative to flexible proximal portion 20 of shaft 15), and when knob 850 is rotated in a second, opposite direction, the tension on the proximal end of gross articulation cable 805 is relaxed and allowed to move distally, whereby to enable flex spine 810 of intermediate articulating portion 800 of shaft 15 to return to its straight, non-articulated configuration.
  • flex spine 810 of intermediate articulating portion 800 can be configured to automatically return to its straight (i.e., non-articulated) configuration when knob 850 is released by a user.
  • flex spine 810 may be formed out of a resilient flexible material that is biased towards assuming a straight configuration.
  • releasing knob 850 of gross articulation control assembly 835 permits gross articulation cable 805 to move distally (i.e., under the power of the biasing force provided by the resilient nature of flex spine 810), whereby to permit flex spine 810 to return to its straight (i.e., non- articulated) configuration.
  • an additional gross articulation cable 805A (not shown) may be provided, wherein the distal end of the additional gross articulation cable 805A is mounted (e.g., diametrically opposed to gross articulation cable 805) to the inner surface of flex spine 810 proximate distal end 820 of flex spine 810, whereby to help facilitate returning flex spine 810 (and hence intermediate articulating portion 800) to its straight (i.e., non-articulated) configuration and/or articulating flex spine 810 in a second, opposite direction.
  • the additional gross articulation cable 805A may be provided, wherein the distal end of the additional gross articulation cable 805A is mounted (e.g., diametrically opposed to gross articulation cable 805) to the inner surface of flex spine 810 proximate distal end 820 of flex spine 810, whereby to help facilitate returning flex spine 810 (and hence intermediate articulating portion 800) to its straight (i.e., non-articulated) configuration and
  • knob 850 of gross articulation control assembly 835 so as to articulate flex spine 810 of intermediate articulating portion 800 typically requires the use of two hands (i.e., one hand to grip handle 10, and the other hand to rotate knob 850).
  • knob 850 could be replaced with a lever (not shown) or other actuation means, so as to enable one-handed articulation of flex spine 810 of intermediate articulating portion 800.
  • the profile of end effector 30 is first reduced (e.g., where end effector 30 comprises a grasper, the jaws of the grasper are closed); shaft 15 is straightened; handle 10 is longitudinally advanced so as to longitudinally advance the distal end of medical instrument 5 through a portal and into the body (e.g., along a tortuous path); handle 10 is longitudinally advanced and/or rotated, and/or distal articulating portion 25 of shaft 15 is articulated, and/or intermediate articulating portion 800 is articulated, and/or end effector 30 is reticulated so that end effector 30 appropriately addresses the target tissue at the intemal site; end effector 30 is used to perform the desired procedure (e.g., where end effector 30 comprises a surgical grasper, the jaws of the grasper are opened and/or closed to grasp tissue and/or perform a surgical procedure) at the internal site; and the distal end of medical instrument 5 is withdrawn from the body, e
  • the medical instrument may be modified so as to provide less (or more) than the seven aforementioned motions, e.g., the roticulation function may be eliminated, an additional rotational function such as selective rotation of shaft 15 may be added, etc.

Abstract

Appareil permettant d'effectuer une intervention à effraction minimale, l'appareil comprenant : un arbre ayant une extrémité distale et une extrémité proximale ; une poignée fixée à l'extrémité proximale de l'arbre ; et un effecteur d'extrémité fixé à l'extrémité distale de l'arbre ; l'arbre comprenant une partie flexible, une première partie d'articulation et une seconde partie d'articulation, la partie flexible s'étendant de manière distale à partir de la poignée, la première partie d'articulation s'étendant de manière distale à partir de la partie flexible, et la seconde partie d'articulation s'étendant de manière distale à partir de la première partie d'articulation ; au moins un câble d'articulation s'étendant de la poignée à la première partie d'articulation, de telle sorte que, lorsqu'une tension est appliquée au ou aux câbles d'articulation, la première partie d'articulation fléchit ; une pluralité de câbles d'articulation s'étendant de la poignée à la seconde partie d'articulation, de telle sorte que, lorsqu'une tension est appliquée à au moins l'un de la pluralité de câbles d'articulation, la seconde partie d'articulation fléchit.
PCT/US2020/050480 2019-09-30 2020-09-11 Instruments médicaux permettant d'effectuer des interventions à effraction minimale WO2021067024A1 (fr)

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US62/908,033 2019-09-30
US16/678,688 US11504104B2 (en) 2015-10-20 2019-11-08 Medical instruments for performing minimally-invasive procedures
US16/678,688 2019-11-08

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