Fluid jet surgical instruments

• US 6,375,635 B1
• Filed: 05/18/1999
• Issued: 04/23/2002
• Est. Priority Date: 05/18/1999
• Status: Expired due to Term

• Current Assignee: HydroCision, Inc.
• Original Assignee: HydroCision, Inc.
• Inventors: Moutafis, Timothy E., Staid, Kevin, Freeman, Donald C. Jr.
• Primary Examiner(s): Kennedy, Sharon
• Assistant Examiner(s): WILLIAMS, CATHERINE SERKE
• Application Number:
  US09/313,679
• Time in Patent Office: 1,071 Days
• Field of Search: 604/22, 604/19, 604/27, 604/35, 604/39, 604/40, 604/42-43, 604/93.01, 604/149-150, 606/167, 606/159, 606/170, 606/128
• US Class Current: 604/43
• CPC Class Codes: A61B 17/3203 Fluid jet cutting instruments
• CPC Class Codes: A61B 17/32037 for removing obstructions from inner organs or blood vessels, e.g. for atherectomy
• CPC Class Codes: A61B 2017/2926 Details of heads or jaws
• CPC Class Codes: A61B 2017/32032 using cavitation of the fluid

Abstract

The invention provides a variety of surgical instruments for forming a liquid jet, which are useful for performing a wide variety of surgical procedures. In some embodiments, the invention provides surgical liquid jet instruments having a pressure lumen and an evacuation lumen, where the pressure lumen includes at least one nozzle for forming a liquid jet and where the evacuation lumen includes a jet-receiving opening for receiving the liquid jet when the instrument is in operation. In some embodiments, the pressure lumen and the evacuation lumen of the surgical liquid jet instruments are constructed and positionable relative to each other so that the liquid comprising the liquid jet, and any tissue or material entrained by the liquid jet can be evacuated through the evacuation lumen without the need for an external source of suction. The invention also provides a variety of surgical liquid jet instruments that are constructed and configured specifically for use in a surrounding liquid environment or a surrounding gaseous environment. The invention also provides a variety of surgical liquid jet instruments that are rotatably deployable from an undeployed position, for insertion into the body of a patient, to a deployed position, in which there is a separation distance between the liquid jet nozzle and the jet-receiving opening that defines a liquid jet path length. The invention also provides surgical methods utilizing the inventive surgical liquid jet instruments, and methods for forming components of thesurgical liquid jet instruments.

Claims

1. A device comprising:

a surgical instrument having a distal end adapted to perform a surgical procedure on a patient and a proximal end adapted to be controllable by an operator, the instrument including;

a pressure lumen having sufficient burst strength to conduct a high pressure liquid towards the distal end of the instrument, the pressure lumen including at least one nozzle providing a jet opening;

an evacuation lumen, including a jet-receiving opening having a cross-sectional area and locatable opposite the jet opening at a predetermined distance therefrom to receive a liquid jet when the instrument is in operation; and

a sheath surrounding at least a portion of the pressure lumen and the evacuation lumen;

the nozzle being shaped to form a liquid jet as a liquid at high pressure flows therethrough, the liquid jet creating an entrainment region of moving liquid such that essentially all of the moving liquid in the entrainment region is directed into the jet-receiving opening when the instrument is in operation;

the cross-sectional area of the jet-receiving opening and the predetermined distance being selected so that the entrainment region occupies between 50% and 100% of the cross-sectional area of the jet-receiving opening when the instrument is in operation; and

at least one of the pressure lumen and the evacuation lumen being movable relative to the other, where the movement comprises a rotational movement that causes a change in the predetermined distance, which change causes a corresponding change in the length of the liquid jet when the instrument is in operation.

2. A device as in claim 1, wherein the rotational movement comprises rotation of a lumen about an axis that is at least one of parallel and co-linear to a longitudinal axis of the lumen, the longitudinal axis of the lumen being essentially parallel to a longitudinal axis of the sheath.

3. A device comprising:

a surgical instrument having a distal end adapted to perform a surgical procedure on a patient and a proximal end including a body, the body having a grasping region shaped and positionable to be held by a hand of an operator, the instrument including;

a pressure lumen having sufficient burst strength to conduct a high pressure liquid towards the distal end of the instrument, the pressure lumen including at least one nozzle providing a jet opening; and

an evacuation lumen, supported by the body, including a jet-receiving opening locatable opposite the jet opening, at a predetermined distance therefrom, to receive a liquid jet when the instrument is in operation;

the distal end of the surgical instrument having a predetermined contour and size selected to facilitate insertion of the distal end of the surgical instrument into a confined region of a body defining a surgical operating space for a specific surgical procedure; and

at least a portion of at least one of the pressure lumen and the evacuation lumen being rotatably movable, relative to the other, from an undeployed configuration, for insertion of the distal end of the surgical instrument into the confined region, to a deployed configuration providing a desired separation distance between the jet opening and the jet-receiving opening when the instrument is in operation.

4. A device as in claim 3, wherein at least a portion of at least one of the pressure lumen and the evacuation lumen is rotatably movable about an axis at least one of parallel and co-linear to their longitudinal axis, the longitudinal axis of the rotatably movable lumen being essentially parallel to a longitudinal axis of the body of the instrument.

5. A device comprising:

a surgical instrument having a distal end adapted to perform a surgical procedure on a patient and a proximal end including a body, the body having a grasping region shaped and positionable to be held by a hand of an operator, the instrument including;

a pressure lumen having sufficient burst strength to conduct a high pressure liquid towards the distal end of the instrument, the pressure lumen including at least one nozzle providing a jet opening; and

an evacuation lumen supported by the body including a jet-receiving opening locatable opposite the jet opening to receive a liquid jet when the instrument is in operation,

at least a portion of at least one of the pressure lumen the evacuation lumen being rotatably movable relative to the other for adjustment of a length of the liquid jet when the instrument is in operation.

6. A device as in claim 5, wherein a rotational movement of at least one lumen comprises rotation of the lumen about an axis that is at least one of parallel and co-linear to a longitudinal axis of the lumen, the longitudinal axis of the lumen being essentially parallel to a longitudinal axis of the body of the surgical instrument.

7. A device as in claim 6, wherein the rotational movement of at least one lumen is controllable by manipulating at least one actuating element located on the body of the instrument.

8. A device as in claim 7, wherein the actuating element comprises at least one of a rotatable knob, a rotatable sleeve, a slidable sleeve, and a slidable lever.

9. A device as in claim 7, wherein the actuating element is positionable to enable an operator to hold the body of the instrument in one of at least two different hand/grasping region orientations with a single hand, and to control the rotational movement of at least one lumen in either of the at least two hand/grasping region orientations.

10. A device as in claim 6, wherein one lumen is essentially immobile with respect to the body of the instrument and the other lumen is movable with respect to the body of the instrument.

11. A device as in claim 10, wherein the pressure lumen is essentially immobile with respect to the body of the instrument and the evacuation lumen is movable with respect to the body of the instrument.

12. A device as in claim 10, wherein the lumen that is movable with respect to the body of the instrument includes a region that is at least one of flexible and twistable within the body of the instrument.

13. A device as in claim 10, wherein the body of the instrument includes a component that is rotatably mounted therein to which component is fixably attached the lumen that is movable with respect to the body of the instrument such that a rotational movement of the component causes a rotational movement of the lumen.

14. A device as in claim 13, wherein the rotational movement of the component that is rotatably mounted within the body of the instrument is controllable by manipulating an actuating element located on the body of the instrument, and wherein a degree of rotation of the component is constrained between at least two endpoints defining an extent of the degree of rotation, with a first endpoint corresponding to an essentially zero separation distance between the jet opening and the jet-receiving opening and a second endpoint corresponding to a predetermined maximum separation distance between the jet opening and the jet-receiving opening.

15. A device as in claim 6, wherein the component that is rotatably mounted within the body of the instrument includes at least one of a slot and groove thereon and wherein at least one of the body of the instrument and an actuating element includes a pin, the at least one of a slot and groove having a longitudinal axis that is non-parallel with respect to the longitudinal axis of the body of the instrument, and the rotational movement of the component being effected by slidably moving the pin within at least one of the slot and groove.

16. A device as in claim 6, wherein an axis defining a direction of at least a central region of the liquid jet and a longitudinal axis of the body of the surgical instrument are non-parallel to each other when the instrument is in operation.

17. A device as in claim 16, wherein an angle between the axis defining a direction of at least a central region of the liquid jet and the longitudinal axis of the body of the surgical instrument is between about 45 and about 115 degrees when the instrument is in operation.

18. A device as in claim 17, wherein an angle between the axis defining a direction of at least a central region of the liquid jet and the longitudinal axis of the body of the surgical instrument is between about 80 and about 100 degrees when the instrument is in operation.

19. A device as in claim 18, wherein an angle between the axis defining a direction of at least a central region of the liquid jet and the longitudinal axis of the body of the surgical instrument is about 90 degrees when the instrument is in operation.

20. A device as in claim 5, wherein the evacuation lumen is shaped and positionable to enable evacuation of essentially all of the liquid, comprising the liquid jet, from the jet-receiving opening to a proximal end of the evacuation lumen without the need for an external source of suction.

21. A device comprising:

a surgical instrument having a distal end adapted to perform a surgical procedure on a patient and a proximal end including a body, the body having a grasping region shaped and positionable to be held by a hand of an operator, the instrument including;

a pressure lumen comprising a tubular conduit having sufficient burst strength to conduct a high pressure liquid towards the distal end of the instrument, the pressure lumen having a distal end including at least one nozzle providing a jet opening; and

an evacuation lumen supported by the body including a jet-receiving opening locatable opposite the jet opening to receive a liquid jet when the instrument is in operation, with

the distal end of the pressure lumen being shaped to enable the jet opening to be positionable adjacent to a surface to be ablated or debrided such that a liquid jet emanating from the jet opening is separated from the surface by a distance essentially equal to a wall thickness, at the jet opening, of the tubular conduit, and the nozzle comprising a necked region of the conduit having a cross-sectional area less than a cross-sectional area of the tubular conduit outside of and proximal to the necked region, the necked region having an axial centerline that is offset from the axial centerline of the tubular conduit outside of the necked region by a distance of about an internal radius of the tubular conduit outside of the necked region minus an internal radius of the necked region.