Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS20090088789 A1
Publication typeApplication
Application numberUS 11/863,839
Publication date2 Apr 2009
Filing date28 Sep 2007
Priority date28 Sep 2007
Also published asUS9421056, US20160045240, US20160331362
Publication number11863839, 863839, US 2009/0088789 A1, US 2009/088789 A1, US 20090088789 A1, US 20090088789A1, US 2009088789 A1, US 2009088789A1, US-A1-20090088789, US-A1-2009088789, US2009/0088789A1, US2009/088789A1, US20090088789 A1, US20090088789A1, US2009088789 A1, US2009088789A1
InventorsMichael J. O'Neil, Michael A. Slivka, Anwar Upal, John Riley Hawkins, Michael A. Fisher
Original AssigneeO'neil Michael J, Slivka Michael A, Anwar Upal, John Riley Hawkins, Fisher Michael A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Balloon With Shape Control For Spinal Procedures
US 20090088789 A1
Abstract
In intervertebral operative spinal procedures, using separate or pre-attached spreader blocks to control the directional growth of a distracting balloon.
Images(22)
Previous page
Next page
Claims(20)
1. A distractor comprising:
a) a spreader block having a height defined by first and second surfaces, a width defined by third and fourth surfaces, and a slot extending between the first and second surfaces,
b) a first arm having a proximal portion hinged at the proximal end portion of the spreader block on the third surface thereof and a distal portion,
c) an uninflated balloon extending from the slot and attached to the distal portion of the first arm.
2. The distractor of claim 1 further comprising:
d) a second arm having a proximal portion hinged at the proximal end portion of the spreader block on the fourth surface thereof and a distal portion.
3. The distractor of claim 2 wherein uninflated balloon is attached to the distal portion of the second arm.
4. The distractor of claim 1 wherein the balloon forms a shape when inflated that runs substantially transverse to the spreader block.
5. The distractor of claim 4 wherein the shape is a banana shape.
6. A distractor comprising:
a) a spreader block having a height defined by first and second surfaces, a width defined by third and fourth surfaces, and a slot extending between the first and second surfaces, and
b) an uninflated balloon having a proximal portion within the slot and a distal portion extending outside the slot.
7. The distractor of claim 6 wherein the balloon forms a shape when inflated that runs substantially transverse to the spreader block.
8. The distractor of claim 7 wherein the shape is a banana shape.
9. A distractor comprising:
i) a proximal cannulated handle having a throughbore, and
ii) a distal portion attached to the handle comprising:
a rotatable spreader block having a height defined by first and second surfaces and a width defined by third and fourth surfaces, and
an uninflated balloon having an open end attached to the throughbore.
10. The distractor of claim 9 wherien one of the first and second surfaces of the spreader block is recessed to form a pocket in which the uninflated balloon resides.
11. A method of treating a disc, comprising the steps of:
a) providing an insertion instrument comprising a proximal handle and a distal rotatable spreader block having a height defined by first and second surfaces and a width defined by third and fourth surfaces,
b) inserting the spreader block into the disc space so that the first and second surfaces thereof contact the opposed vertebral body endplates,
c) rotating the spreader block in the disc space so that the third and fourth surfaces thereof contact the opposed vertebral body endplates,
d) inserting an uninflated balloon into the disc space adjacent the spreader block,
e) inflating the balloon so that the balloon contacts one of the first and second surfaces of the spreader block.
12. The method of claim 11 wherein the distal spreader block has a curved distal end portion.
13. The method of claim 11 wherein the distal spreader block has a slot extending between the first and second surfaces thereof.
14. The method of claim 13 wherein the uninflated balloon resides within the slot.
15. The method of claim 11, further comprising the steps of:
f) providing a second insertion instrument comprising a proximal handle and a distal rotatable spreader block having a height defined by first and second surfaces and a width defined by third and fourth surfaces,
g) inserting the spreader block of the second insertion instrument into the disc space so that the first and second surfaces thereof contact the opposed vertebral body endplates.
16. The method of claim 15, further comprising the steps of:
h) rotating the spreader block of the second insertion instrument in the disc space so that the third and fourth surfaces thereof contact the opposed vertebral body endplates.
17. The method of claim 16, further comprising the steps of:
i) inflating the balloon so that the balloon contacts each spreader block.
18. A method of treating a disc, comprising the steps of:
a) providing a pair of co-axial outer and inner cannulae, wherein the inner cannula has a distal portion comprising a delivery hole and comprises a shape memory material,
b) inserting the co-axial outer and inner cannulae into the disc space,
c) moving the outer cannula relative to the inner cannula to expose the inner cannula, thereby causing the distal portion of the inner shape memory cannula to revert to a memorized annular shape having an inner surface including the delivery hole,
d) delivering an uninflated balloon to the disc space through the delivery hole of the inner cannula,
e) inflating the balloon to substantially contact the inner surface of the memorized annular shape, and
f) retracting the inner cannula.
19. The method of claim 18 wherein the step of moving the outer cannula relative to the inner cannula to expose the inner cannula comprises retracting the outer cannula.
20. A intervertebral distractor instrument comprising a proximal handle and a distal spreader block having a curved distal end portion.
Description
    BACKGROUND OF THE INVENTION
  • [0001]
    The natural intervertebral disc contains a jelly-like nucleus pulposus surrounded by a fibrous annulus fibrosus. Under an axial load, the nucleus pulposus compresses and radially transfers that load to the annulus fibrosus. The laminated nature of the annulus fibrosus provides it with a high tensile strength and so allows it to expand radially in response to this transferred load.
  • [0002]
    In a healthy intervertebral disc, cells within the nucleus pulposus produce an extracellular matrix (ECM) containing a high percentage of proteoglycans. These proteoglycans contain sulfated functional groups that retain water, thereby providing the nucleus pulposus with its cushioning qualities. These nucleus pulposus cells may also secrete small amounts of cytokines as well as matrix metalloproteinases (MMPs). The cytokines help regulate the metabolism of the nucleus pulposus cells.
  • [0003]
    In some instances of disc degeneration disease (DDD), gradual degeneration of the intervertebral disc is caused by mechanical instabilities in other portions of the spine. In these instances, increased or unconventional loads and pressures on the nucleus pulposus cause the cells to emit larger than normal amounts of the above-mentioned cytokines. In other instances of DDD, genetic factors or apoptosis can also cause the cells within the nucleus pulposus to emit toxic amounts of these cytokines and MMPs. In some instances, the pumping action of the disc may malfunction (due to, for example, a decrease in the proteoglycan concentration within the nucleus pulposus), thereby retarding the flow of nutrients into the disc as well as the flow of waste products out of the disc. This reduced capacity to eliminate waste may result in the accumulation of high levels of toxins which leads to nerve irritation and pain.
  • [0004]
    As DDD progresses, the toxic levels of the cytokines present in the nucleus pulposus begin to degrade the extracellular matrix. In particular, the MPPs (as mediated by the cytokines) begin cleaving the water-retaining portions of the proteoglycans, thereby reducing its water-retaining capabilities. This degradation leads to a less flexible nucleus pulposus, and so changes the loading pattern within the disc, thereby possibly causing delamination of the annulus fibrosus. These changes cause more mechanical instability, thereby causing the cells to emit even more cytokines, and thereby typically upregulating MMPs. As this destructive cascade continues and DDD further progresses, the disc begins to bulge (“a herniated disc”), and then ultimately ruptures, causing the nucleus pulposus to contact the spinal cord and produce pain.
  • [0005]
    Conventional technology for treating such pain includes the replacing the degenerating disc with either a fusion cage or a motion disc. The literature related to such treatments details the use of both spreader blocks and intra-discal balloons within the intradiscal space. Various spreader blocks are frequently utilized to loosen disc tissue, expand/regain disc height, and encourage vertebral body endplate vascularity. General in-situ balloon art also includes stand alone implants and balloons reinforced with bands, fabrics or scaffolds to enable directional growth.
  • [0006]
    U.S. Pat. No. 6,632,235 (Weikel) discloses a balloon for insertion into the disk space and inflated to distract the vertebrae. The controlled inflation of the balloon may ensure optimum distraction of the vertebrae and facilitate maximum implant height and neural foraminal decompression. If the balloon is to serve as a distraction instrument, a bone or synthetic allograft along with cancellous bone graft or filler material may then be implanted into contralateral disc space. Once the implant and other materials are in the desired position, the balloon may be deflated and removed from the disk space and a second implant of the same height may be inserted into that space. If the balloon is to serve as a spacer for intervertebral body fusion, the balloon may be inflated with a filler material that sets to form an synthetic allograft implant in vivo. Once the implant has been adequately formed, the balloon may be lysed and removed from the disk space. In another example, the inflated balloon is left intact and is separated from the catheter to remain within the disk space as a scaffold for new bone growth. As previously described, a balloon implant also may be resorbed by physiological conditions and expelled from the patient or transformed and remodeled into new bone growth.
  • [0007]
    U.S. Pat. No. 6,332,894 (Stalcup) discloses an orthopaedic implant for implanting between adjacent vertebrae and a spine, includes a generally annular bag; and a hardened polymer with the bag. The method of fusing adjacent vertebrae in a spine includes the steps of forming an access hole in an annulus of a disc between the adjacent vertebrae; removing the nucleus within the disc to form a cavity surrounded by the annulus; placing a generally annular bag within the cavity; filling the bag with a polymer; injecting bone particles into the cavity surrounded by the annular bag; and hardening the polymer.
  • [0008]
    US Published Patent Application 2006/0264945 (Edidin) discloses a scaffold configured to be disposed in a bone. The scaffold is configured to move from a first configuration to a second configuration. The scaffold in the second configuration is expanded from the first configuration. A selectively-expandable actuator is configured to be removably disposed within the scaffold. The selectively-expandable actuator is configured to move at least a portion of the scaffold to the second configuration when the selectively-expandable actuator is moved to an expanded configuration. A shape of the selectively-expandable actuator is substantially the same as a shape of the scaffold when the selectively-expandable actuator and the scaffold are in the second configuration. The selectively-expandable actuator configured to be removed from the scaffold when in a collapsed configuration. The scaffold is configured to remain substantially in the second configuration after the scaffold has been expanded by the actuator.
  • [0009]
    US Published Patent Application US2005/0070900 (Serhan) discloses an intervertebral fusion device includes a body having a proximal portion along a major axis of the body and a distal portion along the major axis, and supporting means at the distal portion. The supporting means supports vertebrae in a distracted position while the vertebrae fuse. At least one of the body and the supporting means has a height distinct from a width, whereby the body or supporting means can distract vertebrae, between which the body or the supporting means has been placed, by rotation of the body or the supporting means about the major axis. A method of fusing vertebrae includes the steps of inserting between two vertebrae an intervertebral fusion device and rotating the body or the supporting means, whereby the vertebrae are supported in a distracted position while the vertebrae fuse. US2004/0073213 (Serhan) discloses a device for distracting two vertebral bodies and delivering a flowable material into the disc space, comprising a body having a proximal portion and a distal portion, the distal portion having a shape adapted to distract, the body also having a longitudinal bore defining a first outlet port in the distal portion, and a first injection port in the proximal portion.
  • [0010]
    US Published patent applications US2005/0070900 and US2004/0073213 disclose fluid dispensing through a spreader block. These applications require the balloon(s) to be in direct fluid communication with the spreader.
  • SUMMARY OF THE INVENTION
  • [0011]
    The general concept of the present invention relates to devices and methods for minimally invasive disc space distraction and implantation to address degenerative disc disease (DDD), HNP, stenosis, or other conditions of a functional spinal unit.
  • [0012]
    This present invention uses separate or pre-attached spreader blocks to control the directional growth of the distracting balloon. Preferably, fluid communication to the balloons is not achieved through the block. In addition, spreader block material, geometry and surgical placement options are disclosed to ensure directional expansion including vertical growth for increasing disc space height.
  • [0013]
    Spreader blocks and a balloon of the present invention are used together as either disc distraction instruments and/or implants. Spreader blocks of varying sizes and shapes are employed to contain balloon expansion in various planes. The balloon containment embodiments that are disclosed herein assist in ensuring directional expansion to accomplish vertical growth for increasing disc space height. The various combinations of balloon and spreader blocks concepts can be divided into (a) non-attached and (b) pre-attached or conjoined embodiments.
  • Unattached Spreader Blocks and Balloons:
  • [0014]
    In some embodiments, the spreader blocks and balloon are not physically joined together and so are independent.
  • [0015]
    Spreader Block (see FIGS. 1 a-3 b).
  • [0016]
    In one example thereof, a single spreader block and a single independent balloon are initially placed within the disc space. The spreader block is rotated to loosen the annulus fibrosus and regain some of the collapsed disc height. The balloon is then inflated, thereby filling the cleared disc cavity defined by the spreader block and the natural annulus and further distracting the disc to regain even more disc height. The spreader block both limits radial expansion of the balloon and thereby encourages vertical balloon expansion.
  • [0017]
    Multiple Spreader Blocks:
  • [0018]
    In other examples wherein the spreader blocks and balloon are independent (i.e., not physically joined together), multiple spreader blocks can be employed to control balloon expansion in multiple directions. See FIGS. 4 a-6 b. Various spreader block geometries can be used to control balloon expansion towards desired directions or into desired locations. For example, in some embodiments (FIGS. 7 a-10 b), a curved spreader (which is not rotated) is employed to direct balloon expansion away from the anterior and lateral portions of the annulus fibrosus. In other embodiments (FIGS. 11 a & 12 b), a slotted spreader block directs balloon expansion to a relatively narrow vertical support beam, thereby significantly limiting balloon expansion in the axial plane and enabling increased balloon expansion in the cranial/caudal plane.
  • [0019]
    Shape Memory Spreader:
  • [0020]
    In some embodiments, a shape memory insert is provided as a means for containing the expansion of the balloon in the radial plane while allowing free expansion in the cephalad-caudal directions. See FIGS 13 a-f. The shape memory insert can create a curved barrier, or it can lock upon itself, thereby forming a full ring as the sleeve is retracted (or the shape memory insert advanced). In other embodiments, the shape memory insert may be left free to act as a spring allowing some expansion of the balloon in the coronal/saggital plane.
  • [0021]
    In some shape memory embodiments, there is provided a method of using a shape memory balloon containment instrument in a disc space, comprising the steps of:
      • a) inserting an instrument comprising an insert and a sleeve into disc space,
      • b) moving the sleeve relative to the insert to expose the insert, and thereby allowing the insert to curve, contact, connect and/or lock upon itself,
      • c) inserting a cannula and a balloon contained therein through a guide channel in the insert,
      • d) expanding the balloon,
      • e) retracting the insert through the sleeve, and
      • f) removing the sleeve while allowing the expanded balloon to remain behind.
  • Integrated Spreaders and Balloons:
  • [0028]
    In another embodiment, the spreader block may further possess a means of balloon delivery and expansion. In this case, the balloon and spreader block(s) are provided in an integrated (attached) state and inserted into the disc space as an assembly. Such integrated assemblies can be adapted to carry out to several of the previous concepts. For instance, the spreader block can have a pocket or recess to contain the balloon (see FIG. 14 a-b and 15 a-b). Alternatively (as seen in FIG. 16 a-19 b), the spreader block functions as an inserter/spacer to enable balloon expansion and a combination of spreader and balloon geometry controls direction of balloon expansion. In these integrated embodiments, after its expansion, the balloon can be disconnected from the spreader with which it is integrated by cutting or twisting, typically at predetermined break-off locations.
  • [0029]
    In an alternative embodiment, the balloon is contained within a sectioned spreader block. The spreader block is inserted into a cleared, collapsed disc space, and rotated to regain disc height. Then the balloon is filled. As the balloon fills, it deploys outwards from the spreader block. Sections of the spreader block that are temporarily attached to the balloon deploy with the balloon. The function of these deployed sections is to control the expansion of the balloon—if the deployable spreader block sections are hinged to the base of the spreader block, they only allow the balloon to deploy into an arcuate shape (as depicted in FIGS. 20 a-21 b. Also, the deployed spreader block sections could help prevent the expanding balloon from assuming a circular cross-section, thereby achieving a long, tall, arcuate balloon (rather than a curved hot dog shape). In these embodiments, the balloon could be operated under high pressure (to cause additional disc space distraction) or low pressure (requiring the spreader block to perform the mechanical work). In this alternative embodiment, the final implant would be the filled, cured, deployed balloon strut in a generally arcuate shape.
  • [0030]
    In another alternative embodiment, the device includes joined balloon ends with a filler mechanism in the middle. Upon filling, this balloon would assume a crescent shape with the narrow ends of the crescent being attached by a “tether” of unfilled balloon material. This embodiment would provide an arcuate, filled balloon but constructed from multiple circular devices. Thus, a high-pressure balloon is constructed that deploys through a spreader block, distracts the disc space, and forms a self-stable implant strut.
  • [0031]
    In both the independent and intergrated balloon/spreader embodiments, the balloon can be used as an instrument or as an implant. When utilized as an instrument, the balloon is filled with a fluid (such as a gas, liquid or semi-solid (saline, contrast agent, radiopaque gel, etc.,) to confirm the disc space cavity volume via monitoring the injectate volume and shape via intra-operative imaging. In some embodiments, the injectate can then be evacuated from the balloon and an implant inserted in the disc space. In others, the same balloon (or a new balloon) can be filled with an implant-grade material that encourages fusion (bone cements, osteoinductive cements, bone particles, bone substitutes, growth factors, BMP, etc. . . . ) or maintains motion (viscous gels, cureable elastomers, hydrogels, etc. . . . ).
  • DESCRIPTION OF THE FIGURES
  • [0032]
    FIGS. 1 a-3 b disclose the use of a single spreader block and balloon within the disc space.
  • [0033]
    FIGS. 4 a-6 b disclose the use of two spreader blocks and a balloon within the disc space to limit radial expansion of the balloon.
  • [0034]
    FIGS. 7 a-8 b disclose the use of a single curved spreader block and balloon within the disc space.
  • [0035]
    FIGS. 9 a-10 b disclose the use of a curved spreader block, a straight spreader block and a balloon within the disc space to limit radial expansion of the balloon.
  • [0036]
    FIGS. 11 a-12 b disclose the use of a single slotted spreader block and balloon within the disc space.
  • [0037]
    FIG. 13 a-f discloses an embodiment utilizing a shape memory structure.
  • [0038]
    FIG. 14 a-15 b discloses an integrated distractor, wherein the balloon and spreader are attached.
  • [0039]
    FIG. 16 a-17 b discloses an integrated distractor, wherein the balloon resides within a slot in the spreader.
  • [0040]
    FIG. 18 a-19 b discloses an integrated distractor, wherein the balloon resides within a slot in the non-rotating distractor.
  • [0041]
    FIG. 20 a-21 b discloses an integrated distractor having deployable spreader block portions.
  • DETAILED DESCRIPTION OF THE INVENTION
  • [0042]
    Generally, in independent (or “unattached”) embodiments, there is generally provided:
      • a) a spreader insertion instrument comprising a proximal handle and a distal spreader block having a distal end portion, a height defined by first and second surfaces, and a width defined by third and fourth surfaces, and
      • b) an inflatable device comprising i) a proximal cannula having a proximal end and a distal end, and ii) a distal balloon having a proximal opening attached to the distal end of the cannula.
  • [0045]
    A first function of the spreader insertion instrument is to provide an initial distraction of the disc space. Typically, the width of the spreader block is greater than its height (i.e., the distance between its third and fourth surfaces exceeds the distance between its first and second surfaces). Accordingly, when the spreader block is inserted into the disc space (so that its first and second surfaces contact the endplates) and then rotated 90 degrees (so that its third and fourth surfaces contact the natural endplates), the distance between the endplates is increased and distraction is achieved.
  • [0046]
    The primary function of the balloon is to achieve a further distraction of the disc space. This is accomplished by inserting the balloon into the disc space and inflating the balloon. The inflated balloon pushes against the opposed endplates and enables distraction of the disc space. However, because many conventional balloons are not equipped with a directional bias, the typical balloon expands according to its path of least resistance. Since the opposing endplates present significant resistance to balloon expansion, conventional balloon expansion occurs substantially in the radial direction, that is, parallel to the endplates, thereby lessening its potential to desirably distract of the disc space.
  • [0047]
    Therefore, a second function of the spreader is to constrain the directional expansion of the balloon. Simply, the spreader provides a blocking function that prevents too much radial expansion of the balloon and directs expansion to occur in the vertical direction, which provides the desired distraction.
  • [0048]
    In one embodiment of the present invention, and now referring to FIGS. 1 a-3 b, there is provided a method of treating a disc, comprising the steps of:
      • a) providing an insertion instrument 1 comprising a proximal handle 2 and a distal rotatable spreader block 3 having a height H defined by first 4 and second 5 surfaces and a width W defined by third 6 and fourth 7 surfaces,
      • b) inserting the spreader block into the disc space so that the first and second surfaces thereof contact the opposed vertebral body endplates,
      • c) rotating the spreader block in the disc space so that the third and fourth surfaces thereof contact the opposed vertebral body endplates,
      • d) inserting an uninflated balloon 8 into the disc space adjacent the spreader block,
      • e) inflating the balloon so that the balloon contacts one of the first and second surfaces of the spreader block.
  • [0054]
    The method disclosed in FIGS. 1 a-3 b allows the surgeon to sequentially achieve the desired distraction by using an independent balloon and spreader block. The block directs expansion of the balloon in a preferred direction. When the desired distraction is achieved, an intervertebral implant may be inserted into the distracted disc space. After the implant is firmly implanted, the balloon and spreader block may be removed.
  • [0055]
    In another embodiment of the present invention, and now referring to FIGS. 4 a-6 b, there is provided a method of treating a disc, comprising the steps of:
      • a) providing first 1 and second 11 insertion instruments, each instrument comprising a proximal handle 2,12 and a distal rotatable spreader blocks 3,13, each block having a height defined by first 4,14 and second 5,15 surfaces and a width defined by third 6,16 and fourth 7,17 surfaces,
      • b) inserting each spreader block into the disc space so that the first and second surfaces thereof contact the opposed vertebral body endplates,
      • c) rotating each spreader block in the disc space so that the third and fourth surfaces thereof contact the opposed vertebral body endplates,
      • d) inserting an uninflated balloon 18 into the disc space between the spreader blocks,
      • e) inflating the balloon so that the balloon contacts one of the first and second surfaces of each spreader block.
  • [0061]
    The method disclosed in FIGS. 4 a-6 b allows the surgeon to sequentially achieve the desired distraction using an independent balloon and two spreader blocks, wherein the inner surfaces of the opposed spreader blocks define the extremities of radial expansion of the balloon. Thus, the surgeon can control a substantial portion of the footprint made by the balloon in the disc space through the use of a pair of spreader blocks.
  • [0062]
    In another embodiment of the present invention, and now referring to FIGS. 7 a-8 b, there is provided a method of treating a disc, comprising the steps of:
      • a) providing an insertion instrument 21 comprising a proximal handle 22 and a distal spreader block 23 having a curved distal end portion 30, a height defined by first 24 and second 25 surfaces and a width defined by third 26 and fourth 27 surfaces,
      • b) inserting the spreader block into the disc space so that the first and second surfaces thereof contact the opposed vertebral body endplates,
      • c) inserting an uninflated balloon 28 into the disc space adjacent the spreader block,
      • d) inflating the balloon so that the balloon contacts the distal end portion of one of the first and second surfaces of the spreader block.
  • [0067]
    The method disclosed in FIGS. 7 a-8 b is similar to that of FIGS. 1 a-3 b in that each allows the surgeon to sequentially achieve the desired distraction using an independent balloon and spreader block. However, in FIGS. 7 a-8 b, the distal end of the spreader block is curved, thereby constraining the radial expansion of the spreader block.
  • [0068]
    In another embodiment of the present invention, and now referring to FIGS. 9 a-10 b, there is provided a method of treating a disc, comprising the steps of:
      • a) providing a first insertion instrument 21 comprising a proximal handle 22 and a distal spreader block 23 having a curved distal end portion 30, a height defined by first 24 and second 25 surfaces and a width defined by third 26 and fourth 27 surfaces,
      • b) providing a second insertion instrument 31 comprising a proximal handle 32 and a distal spreader block 33 having a distal end portion 40, a height defined by first and second surfaces and a width defined by third 36 and fourth 37 surfaces,
      • c) inserting each spreader block into the disc space so that the distal end portions are substantially in contact, and the first and second surfaces thereof contact the opposed vertebral body endplates,
      • d) inserting an uninflated balloon 28 into the disc space between the spreader blocks,
      • e) inflating the balloon so that the balloon contacts the distal end portion of each spreader block.
  • [0074]
    The method disclosed in FIGS. 9 a-10 b is similar to that of FIGS. 4 a-6 b in that each allows the surgeon to sequentially achieve the desired distraction using an independent balloon and two spreader blocks. It is also similar to that of FIGS. 7 a-8 b, in that the distal end of one spreader block is curved, thereby constraining the radial expansion of the spreader block. Therefore, in this embodiment, the surgeon can control an even greater portion of the footprint made by the balloon in the disc space through the use of a pair of spreader blocks.
  • [0075]
    In another embodiment of the present invention, and now referring to FIGS. 11 a-12 b, there is provided a method of treating a disc, comprising the steps of:
      • a) providing an insertion device 41 comprising i) a spreader block 42 having a height defined by first 43 and second 44 surfaces, a width defined by third 45 and fourth 46 surfaces, and a slot 47 extending between the first and second surfaces, and ii) an uninflated balloon 48 within the slot;
      • b) inserting the spreader block into the disc space so that the first and second surfaces thereof contact the opposed vertebral body endplates, and
      • c) inflating the balloon so that the balloon substantially contacts one of the first and second surfaces of each spreader block.
  • [0079]
    In this embodiment, the spreader block has a through-slot extending in the vertical direction. The block is inserted into the disc space so that the slot contacts the opposing endplates. Expansion of the balloon occurs through the slot and so occurs substantially in the vertical direction, thereby forcing the endplates apart and creating distraction.
  • [0080]
    In another embodiment of the present invention, and now referring to FIGS. 13 a-13 f, there is provided a method of treating a disc, comprising the steps of:
      • a) providing a pair of co-axial outer 51 and inner 52 cannulae, wherein the inner cannula has a distal portion 53 comprising a delivery hole and comprises a shape memory material,
      • b) inserting the co-axial outer and inner cannulae into the disc space,
      • c) moving the outer cannula relative to the inner cannula to expose the inner cannula (for example, retracting the outer cannula), thereby causing the distal portion of the inner shape memory cannula to revert to a memorized annular shape having an inner surface including the delivery hole,
      • d) delivering an uninflated balloon 54 to the disc space through the delivery hole of the inner cannula, and
      • e) inflating the balloon to substantially contact the inner surface of the memorized annular shape, and
      • f) retracting the inner cannula.
  • [0087]
    In this embodiment, a shape memory insert is provided as a means for containing the expansion of the balloon in the radial plane while allowing free expansion in the cephalad-caudal directions. Once, the balloon shape has been created within the shape memory structure, the balloon may be filled with a curable substance that fixes the shape of the balloon. The shape memory structure may then be withdrawn.
  • [0088]
    In another embodiment of the present invention, and now referring to FIGS. 14 a-15 b, there is provided a method of treating a disc, comprising the steps of:
      • a) providing an distractor comprising:
        • i) a proximal cannulated handle 61 having a throughbore, and
        • ii) a distal portion 70 attached to the handle comprising a rotatable spreader block 62 having a height defined by first 63 and second 64 surfaces and a width defined by third 65 and fourth 66 surfaces, and an uninflated balloon 68 having an open end 69 attached to the throughbore and adjacent one of the first and second surfaces of the spreader block,
      • b) inserting the distractor into the disc space so that the first and second surfaces thereof contact the opposed vertebral body endplates,
      • c) rotating the spreader block in the disc space so that the third and fourth surfaces thereof contact the opposed vertebral body endplates,
      • d) inflating the balloon so that the balloon contacts the opposed vertebral body endplates and is directionally biased by one of the first and second surfaces of the spreader block
        This method provides for use of an integrated distractor, wherein the balloon and spreader are attached.
  • [0095]
    Also in accordance with the present invention, and still referring to FIGS. 14 a-15 b, there is provided a distractor comprising:
      • i) a proximal cannulated handle having a throughbore, and
      • ii) a distal portion attached to the handle comprising:
        • a rotatable spreader block having a height defined by first and second surfaces and a width defined by third and fourth surfaces, and
        • an uninflated balloon having an open end attached to the throughbore.
  • [0100]
    In some embodiments, the one of the first and second surfaces of the spreader block is recessed to form a pocket in which the uninflated balloon resides. The pocket protects the uninflated balloon during its insertion into the disc space.
  • [0101]
    In some embodiments, the distractor of FIGS. 14 a-15 b is the distal end portion of an instrument and is used to distract and clear the disc space. It is then removed from the disc space.
  • [0102]
    In some embodiments, the distractor of FIGS. 14 a-15 b is the distal end portion of an implant and may be filled with a strut material to support the disc space during fusion.
  • [0103]
    In another embodiment of the present invention, and now referring to FIGS. 16 a-17 b, there is provided a method of treating a disc, comprising the steps of:
      • a) providing an insertion device comprising i) a spreader block 80 having a height defined by first 71 and second 72 surfaces, a width defined by third 73 and fourth 74 surfaces, and a slot extending between the third and fourth surfaces, wherein the height is less than the width, and ii) an uninflated balloon 75 having a proximal portion 77 within the slot and a distal portion 76 extending outside the slot;
      • b) inserting the spreader block into the disc space so that the first and second surfaces thereof contact the opposed vertebral body endplates,
      • c) rotating the spreader block in the disc space so that the third and fourth surfaces thereof contact the opposed vertebral body endplates, and
      • d) inflating the balloon as the third and fourth surfaces of the spreader block contact the opposed vertebral body endplates.
        This method provides for use of an integrated distractor, wherein the balloon resides within a slot in the distractor.
  • [0108]
    Also in accordance with the present invention, and still referring to FIGS. 16 a-17 b, there is provided a distractor comprising:
      • i) a spreader block having a height defined by first and second surfaces, a width defined by third and fourth surfaces, and a slot extending between the third and fourth surfaces, wherein the height is less than the width, and
      • ii) an uninflated balloon having a proximal portion within the slot and a distal portion extending outside the slot;
        In some embodiments, the distal portion of the balloon forms a shape when inflated that runs substantially transverse to the spreader block. Preferably, such a shape is a banana shape.
  • [0111]
    In some embodiments, the distractor of FIGS. 16 a-17 b is the distal end portion of an instrument and is used to distract and clear the disc space. It is then removed from the disc space.
  • [0112]
    In some embodiments, the distractor of FIGS. 16 a-17 b is the distal end portion of an implant and may be filled with a strut material to support the disc space during fusion.
  • [0113]
    In another embodiment of the present invention, and now referring to FIGS. 18 a-19 b, there is provided a method of treating a disc, comprising the steps of:
      • a) providing an insertion device 81 comprising i) a spreader block 82 having a height defined by first 83 and second 84 surfaces, a width defined by third 85 and fourth 86 surfaces, and a slot 87 extending between the first and second surfaces, and ii) an uninflated balloon 88 having a proximal portion 89 within the slot and a distal portion 90 extending outside the slot;
      • b) inserting the spreader block into the disc space so that the first and second surfaces thereof contact the opposed vertebral body endplates,
      • c) inflating the balloon as the first and second surfaces of the spreader block contact the opposed vertebral body endplates.
  • [0117]
    FIG. 18 a-19 b discloses an integrated distractor, wherein the balloon resides within a slot in the non-rotating distractor.
  • [0118]
    Also in accordance with the present invention, and still referring to FIGS. 18 a-19 b, there is provided a distractor comprising:
      • i) a spreader block having a height defined by first and second surfaces, a width defined by third and fourth surfaces, and a slot extending between the first and second surfaces, and
      • ii) an uninflated balloon having a proximal portion within the slot and a distal portion extending outside the slot.
  • [0121]
    In some embodiments, the distal portion of the balloon forms a shape when inflated that runs substantially transverse to the spreader block. Preferably, such a shape is a banana shape.
  • [0122]
    In some embodiments, the distractor of FIGS. 18 a-19 b is the distal end portion of an instrument and is used to distract and clear the disc space. It is then removed from the disc space.
  • [0123]
    In some embodiments, the distractor of FIGS. 18 a-19 b is the distal end portion of an implant and may be filled with a strut material to support the disc space during fusion.
  • [0124]
    In another embodiment of the present invention, and now referring to FIGS. 20 a-21 b, there is provided a method of treating a disc, comprising the steps of:
      • a) providing a distractor comprising i) a spreader block 91 having a height defined by first 92 and second 93 surfaces, a width defined by third 94 and fourth 95 surfaces, and a slot 96 extending between the first and second surfaces, ii) a first deployable arm 97 having a proximal portion 98 hinged at a proximal end portion 111 of the spreader block on the third surface thereof and a distal portion 99, iii) a second deployable arm 101 having a proximal portion 102 hinged at the proximal end portion of the spreader block on the fourth surface thereof and a distal portion 103, and iv) an uninflated balloon 105 extending from the slot and attached to the distal portions of each deployable arm;
      • b) inserting the spreader block into the disc space so that the first and second surfaces thereof contact the opposed vertebral body endplates,
      • c) inflating the balloon as the first and second surfaces of the spreader block contact the opposed vertebral body endplates.
  • [0128]
    In this embodiment, the balloon is contained within a sectioned spreader block having deployable spreader block portions.
  • [0129]
    Also in accordance with the present invention, and still referring to FIGS. 20 a-21 b, there is provided a distractor comprising:
      • i) a spreader block having a height defined by first and second surfaces, a width defined by third and fourth surfaces, and a slot extending between the first and second surfaces,
      • ii) at least one arm having a proximal portion hinged at the proximal end portion of the spreader block on the third surface thereof and a distal portion,
      • iii) an uninflated balloon extending from the slot and attached to the distal portions of the deployable arm.
  • [0133]
    In some embodiments, the balloon forms a shape when inflated that runs substantially transverse to the spreader block. Preferably, such a shape is a banana shape.
  • [0134]
    In some embodiments, the distractor of FIGS. 20 a-21 b is the distal end portion of an instrument and is used to distract and clear the disc space. It is then removed from the disc space.
  • [0135]
    In some embodiments, the distractor of FIGS. 20 a-21 b is the distal end portion of an implant and may be filled with a strut material to support the disc space during fusion.
  • [0136]
    The device may be made of materials typically selected for use in surgical instruments. Preferably, the entire device is sterile.
  • [0137]
    When placed in-situ (and in some instances, after curing), the flowable material that fills the balloon preferably replaces as least a portion of the natural function of the nucleus fibrosis. Accordingly, in preferred embodiments, the flowable material is a nucleus pulposus replacement. The flowable materials are preferably selected from the group consisting of liquids, gels (such as hydrogels, such as PVA-based hydrogels), and solid materials that are sufficiently morselized to flow under pressure. Typically, the liquid flowable material cures in-situ. The flowable material may cure in-situ to create a stiff material (such as polyurethane), or a relatively pliant material (such as silicone).
  • [0138]
    In other embodiments, the balloon may also be filled in accordance with the methods and materials recited in US Published Patent Application 2004/0230309, filed Feb. 13, 2004 entitled “In-situ formed intervertebral fusion device and method”, the specification of which is incorporated by reference in its entirety.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US5163949 *17 Jul 199117 Nov 1992Bonutti Peter MFluid operated retractors
US6030406 *5 Oct 199829 Feb 2000Origin Medsystems, Inc.Method and apparatus for tissue dissection
US6248110 *9 Jun 199719 Jun 2001Kyphon, Inc.Systems and methods for treating fractured or diseased bone using expandable bodies
US6254598 *20 Jan 19993 Jul 2001Curon Medical, Inc.Sphincter treatment apparatus
US6332894 *7 Mar 200025 Dec 2001Zimmer, Inc.Polymer filled spinal fusion cage
US6547776 *3 Jan 200015 Apr 2003Curon Medical, Inc.Systems and methods for treating tissue in the crura
US6607544 *19 Oct 199919 Aug 2003Kyphon Inc.Expandable preformed structures for deployment in interior body regions
US6632235 *20 Jul 200114 Oct 2003Synthes (U.S.A.)Inflatable device and method for reducing fractures in bone and in treating the spine
US6706069 *13 Sep 200116 Mar 2004J. Lee BergerSpinal grooved director with built in balloon
US7452351 *16 Apr 200418 Nov 2008Kyphon SarlSpinal diagnostic methods and apparatus
US7632294 *22 Jun 200415 Dec 2009Promethean Surgical Devices, LlcDevices and methods for spine repair
US7824431 *28 Apr 20082 Nov 2010Providence Medical Technology, Inc.Cervical distraction method
US8133279 *9 Jan 200713 Mar 2012Warsaw Orthopedic, Inc.Methods for treating an annulus defect of an intervertebral disc
US9126023 *25 Feb 20118 Sep 2015Gmedelaware 2 LlcBalloon expandable cement director and related methods
US9149612 *22 Sep 20146 Oct 2015West Coast Catheter, Inc.Flexible high-pressure balloons
US20030028251 *30 Jul 20016 Feb 2003Mathews Hallett H.Methods and devices for interbody spinal stabilization
US20030220649 *13 Feb 200327 Nov 2003Qi-Bin BaoIntervertebral disc prosthesis
US20040073213 *9 Oct 200215 Apr 2004Hassan SerhanDevice for distracting vertebrae and delivering a flowable material into a disc space
US20040102774 *20 Nov 200327 May 2004Trieu Hai H.Systems and techniques for intravertebral spinal stabilization with expandable devices
US20040230309 *13 Feb 200418 Nov 2004Depuy Spine, Inc.In-situ formed intervertebral fusion device and method
US20050070900 *30 Sep 200331 Mar 2005Depuy Acromed, Inc.Vertebral fusion device and method for using same
US20050090846 *27 May 200428 Apr 2005Wesley PedersenValvuloplasty devices and methods
US20050090852 *18 May 200428 Apr 2005Kyphon Inc.Insertion devices and method of use
US20050288678 *30 Aug 200529 Dec 2005Kyphon Inc.Vertebral body having an altered native cancellous bone volume and related treatment methods
US20060264945 *18 May 200523 Nov 2006Edidin Avram ASelectively-expandable bone scaffold
US20070010846 *17 Oct 200511 Jan 2007Leung Andrea YMethod of manufacturing an expandable member with substantially uniform profile
US20070010848 *11 Jul 200511 Jan 2007Andrea LeungSystems and methods for providing cavities in interior body regions
US20070083225 *21 Apr 200612 Apr 2007Ncontact Surgical, Inc.Diaphragm entry for posterior surgical access
US20070173785 *24 Jan 200626 Jul 2007Boston Scientific Scimed, Inc.Flow-inflated diffusion therapeutic delivery
US20100010530 *16 Jul 200714 Jan 2010Ams Research CorporationBalloon Dilation for Implantable Prosthesis
US20100274188 *11 May 201028 Oct 2010Acclarent, Inc.Method and System for Treating Target Tissue Within the Eustachian Tube
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US886471127 Jan 201021 Oct 2014Warsaw Orthopedic, Inc.Drug dispensing balloon for treating disc disease or pain
US9421056 *28 Oct 201523 Aug 2016DePuy Synthes Products, Inc.Balloon with shape control for spinal procedures
US959206317 Jun 201114 Mar 2017DePuy Synthes Products, Inc.Universal trial for lateral cages
US976367817 Jun 201119 Sep 2017DePuy Synthes Products, Inc.Multi-segment lateral cage adapted to flex substantially in the coronal plane
US980163925 Sep 201431 Oct 2017DePuy Synthes Products, Inc.Lateral spondylolisthesis reduction cage
US980164022 Oct 201531 Oct 2017DePuy Synthes Products, Inc.Lateral spondylolisthesis reduction cage
US20110184349 *27 Jan 201028 Jul 2011Warsaw Orthopedic, Inc.Drug dispensing balloon for treating disc disease or pain
US20110213402 *10 May 20111 Sep 2011Kyphon SarlLow-compliance expandable medical device
US20160045240 *28 Oct 201518 Feb 2016DePuy Synthes Products, Inc.Balloon With Shape Control For Spinal Procedures
US20160175565 *23 Dec 201523 Jun 2016C.R. Bard, Inc.Inflatable medical device and related sheath
WO2011083474A3 *6 Jan 201129 Sep 2011Bioprotect Ltd.Controlled tissue dissection systems and methods
Classifications
U.S. Classification606/192
International ClassificationA61M29/00
Cooperative ClassificationA61B2017/0225, A61B2017/00557, A61B17/8805, A61B17/025, A61B2017/0256, A61M2025/1063, A61M25/1002, A61M29/02, A61F2/442
European ClassificationA61M29/02
Legal Events
DateCodeEventDescription
25 Jan 2008ASAssignment
Owner name: DEPUY SPINE, INC., MASSACHUSETTS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:O NEIL, MICHAEL J;SLIVKA, MICHAEL A;UPAL, ANWAY;AND OTHERS;REEL/FRAME:020414/0294;SIGNING DATES FROM 20071120 TO 20071127
6 May 2013ASAssignment
Owner name: DEPUY SPINE, LLC, MASSACHUSETTS
Free format text: CHANGE OF NAME;ASSIGNOR:DEPUY SPINE, INC.;REEL/FRAME:030352/0673
Effective date: 20121230
Owner name: HAND INNOVATIONS LLC, FLORIDA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DEPUY SPINE, LLC;REEL/FRAME:030352/0709
Effective date: 20121230
Owner name: DEPUY SYNTHES PRODUCTS, LLC, MASSACHUSETTS
Free format text: CHANGE OF NAME;ASSIGNOR:HAND INNOVATIONS LLC;REEL/FRAME:030352/0722
Effective date: 20121231
24 Feb 2015ASAssignment
Owner name: DEPUY SYNTHES PRODUCTS, INC., MASSACHUSETTS
Free format text: CHANGE OF NAME;ASSIGNOR:DEPUY SYNTHES PRODUCTS, LLC;REEL/FRAME:035074/0647
Effective date: 20141219