SURGICAL ACCESS DEVICE WITH FIXATION MECHANISM AND ILLUMINATION MECHANISM

Abstract

A surgical access device including a cannula body, a fixation mechanism, and an illumination mechanism is disclosed. The fixation mechanism includes a collar, a sleeve, an expandable member, and a distal ring. The illumination mechanism includes at least one light disposed on the expandable member, and a switch. Distal translation of the collar relative to an elongated portion of the cannula body causes the expandable member to move from a first position defining a first gap between a mid-portion of the expandable member and the elongated portion of the cannula body, to a second position defining a second gap between the mid-portion of the expandable member and the elongated portion of the cannula body, the second gap being greater than the first gap.

Claims

1. (canceled)

2. A fixation mechanism for use with a surgical access device, the fixation mechanism comprising: a collar disposed about a longitudinal axis and configured to at least partially surround a portion of the surgical access device; an expandable member disposed in mechanical cooperation with the collar; and at least one light disposed on the expandable member and positioned distally of a longitudinal mid-point of the expandable member, wherein distal translation of the collar relative to a distal end of the expandable member causes the expandable member to move from a first position defining a first gap between the longitudinal mid-point of the expandable member and the longitudinal axis, to a second position defining a second gap between the longitudinal mid-point of the expandable member and the longitudinal axis, the second gap greater than the first gap.

3. The fixation mechanism according to claim 2, wherein the at least one light includes at least four lights.

4. The fixation mechanism according to claim 2, wherein the expandable member defines a plurality of diamond-shaped openings.

5. The fixation mechanism according to claim 4, wherein the least one light includes at least two lights, and each light of the at least two lights is disposed distally of a widest portion of one diamond-shaped opening of the plurality of diamond-shaped openings.

6. The fixation mechanism according to claim 2, further including a biasing element and at least a portion of the biasing element is disposed proximally of the collar.

7. The fixation mechanism according to claim 6, wherein the biasing element is configured to bias the collar distally.

8. The fixation mechanism according to claim 2, further including a sleeve extending distally from the collar.

9. The fixation mechanism according to claim 8, wherein the sleeve is disposed in mechanical cooperation with the expandable member.

10. A fixation mechanism for use with a surgical access device, the fixation mechanism comprising: an expandable member configured to radially surround a portion of an elongated portion of the surgical access device, the elongated portion defining a longitudinal axis, the expandable member movable from a first position defining a first gap between a longitudinal mid-point of the expandable member and the elongated portion, to a second position defining a second gap between the longitudinal mid-point of the expandable member and the elongated portion, the second gap is greater than the first gap; and a first light disposed on the expandable member, wherein the first light is movable from a first position where the first light faces a first direction to a second position where the first light faces a second direction and movement of the expandable member from the first position to the second position causes the first light to move from the first position to the second position.

11. The fixation mechanism according to claim 10, wherein the first position of the first light orients the first light perpendicular to the longitudinal axis.

12. The fixation mechanism according to claim 11, wherein the second position of the first light orients the first light parallel to the longitudinal axis.

13. The fixation mechanism according to claim 10, wherein the first light is disposed distally of the longitudinal mid-point of the expandable member.

14. The fixation mechanism according to claim 10, wherein the second position of the first light orients the first light distally.

15. The fixation mechanism according to claim 10, wherein the expandable member defines a plurality of diamond-shaped openings.

16. The fixation mechanism according to claim 15, further including a second light, wherein the first light and the second light are disposed distally of a widest portion of at least one diamond-shaped opening of the plurality of diamond-shaped openings.

17. The fixation mechanism according to claim 10, further including a collar disposed in mechanical cooperation with the expandable member and configured for longitudinal translation relative to the elongated portion of the surgical access device.

18. The fixation mechanism according to claim 17, further including a switch disposed on the collar and in electrical communication with the first light.

19. A fixation mechanism for use with a surgical access device, the fixation mechanism comprising: a collar at least partially surrounding a portion of an elongated portion of the surgical access device, the elongated portion defining a longitudinal axis, the collar being longitudinally translatable relative to the elongated portion; a sleeve extending distally from the collar; an expandable member extending distally from the sleeve and including a first light; a distal ring engaged with a distal portion of the expandable member; and a switch disposed on the collar and in electrical communication with the first light, wherein distal translation of the collar relative to the distal ring causes the expandable member to move from a first position defining a first gap between a longitudinal mid-point of the expandable member and the longitudinal axis, to a second position defining a second gap between the longitudinal mid-point of the expandable member and the longitudinal axis, the second gap greater than the first gap.

20. The fixation mechanism according to claim 19, wherein the first light is disposed distally of the longitudinal mid-point of the expandable member.

21. The fixation mechanism according to claim 19, wherein the second position of the expandable member orients the first light distally.

Description

DESCRIPTION OF THE DRAWINGS

[0024] Various aspects of the present disclosure are illustrated herein with reference to the accompanying drawings, wherein:

[0025] FIG. 1 is a perspective view of a surgical access device illustrating a fixation assembly in a deployed configuration in accordance with a first aspect of the present disclosure;

[0026] FIG. 2 is an assembly view of the surgical access device of FIG. 1;

[0027] FIG. 3 is a perspective view of the surgical access device of FIG. 1 illustrating the fixation assembly within tissue in an undeployed configuration;

[0028] FIG. 4 is a longitudinal cross-sectional view of a portion of the surgical access device taken along section line 4-4 in FIG. 3;

[0029] FIG. 5 is a longitudinal cross-sectional view of a portion of the surgical access device taken along section line 5-5 in FIG. 3;

[0030] FIG. 6 is a side view of the surgical access device of FIG. 1 illustrating the fixation assembly within tissue in a deployed configuration and with an illumination mechanism providing illumination;

[0031] FIG. 7 is longitudinal cross-section view of the area of detail indicated in FIG. 6;

[0032] FIG. 8 is a side view of a surgical access device illustrating a fixation assembly in an undeployed configuration in accordance with a second aspect of the present disclosure;

[0033] FIG. 9 is an assembly view of the surgical access device of FIG. 8; and

[0034] FIG. 10 is a side view of the surgical access device of FIG. 8 illustrating the fixation assembly within tissue in a deployed configuration and with an illumination mechanism providing illumination.

DETAILED DESCRIPTION

[0035] Aspects of the presently disclosed surgical access device will now be described in detail with reference to the drawings wherein like numerals designate identical or corresponding elements in each of the several views. As is common in the art, the term “proximal” refers to that part or component closer to the user or operator, i.e. surgeon or physician, while the term “distal” refers to that part or component farther away from the user. As used herein, the terms “parallel” and “perpendicular” are understood to include relative configurations that are substantially parallel and substantially perpendicular up to about + or −10 degrees from true parallel and true perpendicular, respectively, for example.

[0036] Generally, the surgical access device or cannula, often part of a trocar assembly, may be employed during surgery (e.g., laparoscopic surgery) and may, in various aspects, provide for the sealed access of laparoscopic surgical instruments into an insufflated body cavity, such as the abdominal cavity. The cannula is usable with an obturator insertable therethrough. The cannula and obturator are separate components but are capable of being selectively connected together. For example, the obturator may be inserted into and through the cannula until the handle of the obturator engages, e.g., selectively locks into, a proximal housing of the cannula. In this initial configuration, the trocar assembly is employed to tunnel through an anatomical structure, e.g., the abdominal wall, either by making a new passage through the structure or by passing through an existing opening through the structure. Once the trocar assembly has tunneled through the anatomical structure, the obturator is removed, leaving the cannula in place in the structure, e.g., in the incision created by the trocar assembly. The proximal housing of the cannula may include seals or valves that prevent the escape of insufflation gases from the body cavity, while also allowing surgical instruments to be inserted into the body cavity.

[0037] FIGS. 1-7 illustrate a surgical access device according to a first aspect of the present disclosure. With initial reference to FIGS. 1 and 2, the surgical access device 10 includes a cannula body 100, a fixation mechanism 200, and an illumination mechanism 300. The cannula body 100 includes a proximal housing 120 at its proximal end and includes an elongated portion 140 extending distally from the proximal housing 120. The elongated portion 140 defines a channel 150 (FIG. 2) extending therethrough, and defines a longitudinal axis “A-A.” An obturator (not shown) is insertable through the channel 150 and is engageable with the proximal housing 120, for instance.

[0038] The fixation mechanism 200 is positionable around the elongated portion 140 of the cannula body 100 such that such that the fixation mechanism 200 radially surrounds a portion of the elongated portion 140. More particularly, portions of the fixation mechanism 200 are longitudinally translatable relative to the elongated portion 140 between a first position, where a proximal part 211 of a collar 210 of the fixation mechanism 200 is farther away from a distal tip 141 of the elongated portion 140 and where a mid-portion 222 of an expandable member 220 of the fixation mechanism 200 is closer to the longitudinal axis “A-A” (FIGS. 2-5), and a second position, where the proximal part 211 of the collar 210 is closer to the distal tip 141 of the elongated portion 140 and where the mid-portion 222 of the expandable member 220 is farther away from the longitudinal axis “A-A” (FIGS. 1, 6 and 7).

[0039] The expandable member 220 defines a plurality of diamond-like openings 221 around its perimeter (FIGS. 2 and 3). The openings 221 are configured such that narrow portions 221a thereof are located at a proximal end 224 and a distal end 226 of the expandable member 220, and a wide portion 221b of each opening 221 is located at or near the mid-portion 222 of the expandable member 220. This configuration allows or facilitates the expandable member 220 to effectively bend or fold (and unfold) at or near its mid-portion 222 as the fixation mechanism 200 transitions between its first position and its second position. In aspects, the expandable member 220 includes a perforation or crease at or near the mid-portion 222 to further facilitate bending and/or folding.

[0040] In various aspects, the expandable member 220 is made of rubber or plastic. Such a rubber or plastic expandable member 220 is able to retain its shape (in both the first position and the second position) without the need for the expandable member 220 to be filled with fluid (e.g., liquid or gas), for instance.

[0041] Referring to FIGS. 1 and 2, the engagement between the fixation mechanism 200 and the cannula body 100 is shown. The fixation mechanism 200 includes the collar 210, a sleeve 215 extending distally from the collar 210, a proximal ring 216 disposed at a distal end of the sleeve 215, the expandable member 220, and a distal ring 225. The proximal end 224 of the expandable member 220 is engaged with (e.g., affixed to) the proximal ring 216, and the distal end 226 of the expandable member 220 is engaged with (e.g., affixed to) the distal ring 225.

[0042] The collar 210, the sleeve 215, and the proximal ring 216 are longitudinally translatable relative to the elongated portion 140 of the cannula body 100 and are rotatable about the longitudinal axis “A-A” relative to the elongated portion 140. The expandable member 220 and the distal ring 225 are also rotatable about the longitudinal axis “A-A” relative to the elongated portion 140. A lip 141a of the distal tip 141 of the elongated portion 140 restricts distal movement of the distal ring 225 relative to the elongated portion 140. As discussed in further detail below, distal movement of the proximal end 224 of the expandable member 220 relative to the elongated portion 140 causes the mid-portion 222 of the expandable member 220 to move away from the longitudinal axis “A-A.”

[0043] With reference to FIGS. 1-3, further details of the collar 210 of the fixation mechanism 200 are shown. The collar 210 is a ring-like structure that radially surrounds a portion of the elongated portion 140 of the cannula body 100. The collar 210 includes a body 212, a pair of arms 214 extending radially outward from the body 212, and a pair of cam surfaces 211. The arms 214 are configured to be grasped by a user to facilitate rotating the collar 210 about the longitudinal axis “A-A,” and to facilitate translating the collar 210 longitudinally in a direction parallel to the longitudinal axis “A-A.”

[0044] Each cam surface of the pair of cam surfaces 211 of the collar 210 is configured to slidingly engage a respective pin 142 extending radially outward from the elongated portion 140 of the cannula body 100. Each cam surface of the pair of cam surfaces 211 includes a proximal portion 211a, a distal portion 211b, and a connecting portion 211c, which interconnects the proximal portion 211a and the distal portion 211b (FIG. 2). Rotation and distal translation of the collar 210 relative to the elongated portion 140 causes the pair of cam surfaces 211 to move relative to the pins 142 from a first position where each pin 142 is within the distal portion 211b of each cam surface 211 (FIG. 3), which corresponds to the expandable member 220 being in the first, non-expanded position, to a second position (i.e., collapsed position) where each pin 142 is within the proximal portion 211a of each cam surface 211 (FIG. 1), which corresponds to the expandable member 220 being in the second, expanded position.

[0045] Further, the collar 210 is biased proximally into the first position (FIG. 3) (e.g., by the material properties of the expandable member 220), such that the distal portion 211b of the cam surface 211 is urged into the pin 142 of the elongated portion 140 of the cannula body 100, thereby restricting proximal movement of the collar 210 relative to the elongated portion 140. When the collar 210 is in the second position (FIG. 1), the proximal portion 211a of the cam surface 211, which includes a valley or detent, is urged into the pin 142 of the elongated portion 140 thereby restricting proximal movement of the collar 210 relative to the elongated portion 140. The connecting portion 211c of the cam surface 211 guides the movement of the collar 210 relative to the pin 142 between the first and second positions of the collar 210.

[0046] The collar 210 is fixedly engaged with the sleeve 215, such that rotational and longitudinal movement of the collar 210 relative to the elongated portion 140 translates to a corresponding rotational and longitudinal movement of the sleeve 215. Additionally, the proximal ring 216 is fixedly engaged with the sleeve 215 such that rotational and longitudinal movement of the sleeve 215 translates to a corresponding rotational and longitudinal movement of the proximal ring 216.

[0047] With particular reference to FIGS. 4, 5, and 7, the expandable member 220 is sandwiched between the proximal ring 216 and the distal ring 225. As noted above, the distal ring 225 is fixed from moving distally relative to the elongated portion 140 of the cannula body 100 due to its engagement with the lip 141a of the distal tip 141 of the elongated portion 140. Accordingly, as the proximal ring 216 is moved distally, the expandable member 220 becomes longitudinally compressed such that the expandable member 220 moves from its first position (FIGS. 4 and 5) where the mid-portion 222 of the expandable member 220 is in contact with, close to, or adjacent the elongated portion 140, to its second position (FIG. 7) where the mid-portion 222 of the expandable member 220 is farther away from the elongated portion 140.

[0048] Referring to FIGS. 1-3, 6, and 7 various details of the illumination mechanism 300 are shown. Illumination mechanism 300 includes a plurality of lights 310 (e.g., light-emitting diodes (LEDs)) disposed on the expandable member 220, and a switch 320. In the illustrated embodiment, the switch 320 is disposed on one of the arms 214 of the collar 210. In further aspects, the switch 320 may be disposed on a different portion of the surgical access device 10 (e.g., the proximal housing 120). Additionally, a battery (not explicitly shown) may be housed at least partially within one of the arms 214, and/or at least one wire may extend between the switch 320 and the lights 310. For instance, the at least one wire way may extend between the sleeve 215 and the elongated portion 140 of the cannula body (e.g., within a groove of the sleeve 215).

[0049] As shown in FIGS. 1-5, for example, the lights 310 are disposed distally of the mid-portion 222 of the expandable member 220 and are configured to selectively emit light. The switch 320 allows a user to turn on or off the lights 310, as desired. When the expandable member 220 is in its first position (FIGS. 2-5), the lights 310 face sideways, generally perpendicularly to the longitudinal axis “A-A.”

[0050] With particular reference to FIGS. 1, 6 and 7, when the expandable member 220 is in its second position, the lights 310 face distally. Thus, as the expandable member 220 moves between its first position and its second position, the lights 310 correspondingly move between a first position where the lights 310 face sideways, and a second position where the lights 310 face distally. Additionally, when the lights 310 are in the first position, the lights 310 are spaced a first distance from the longitudinal axis “A-A,” and when the lights 310 are in the second position, the lights 310 are spaced a second distance from the longitudinal axis “A-A”; the second distance is greater than the first distance.

[0051] Referring now to FIGS. 1 and 3-7, an anchor 400 is shown. The anchor 400 is positionable around the elongated portion 140 of the cannula body 100 such that the anchor 400 radially surrounds a portion of the elongated portion 140. The anchor 400 can either have a frictional engagement with the elongated portion 140 such that the anchor 400 can be pushed/pulled to move between longitudinal positions, or the anchor 400 can be rotationally engaged with the elongated portion 140 (e.g., a threaded connection) such that the anchor 400 can be rotated about the longitudinal axis “A-A” relative to the elongated portion 140 to move between longitudinal positions. The anchor 400 may also be fixed from longitudinal and/or rotational movement relative to the elongated portion 140.

[0052] In use, when the fixation mechanism 200 is in its first position (FIGS. 2-5), corresponding to the collar 210, the expandable member 220, and the lights 310 being in their first positions, the distal tip 141 of the elongated portion 140 of the cannula body 100 is inserted through an incision in tissue. Engagement between the anchor 400 and a proximal wall of the tissue “T” prevents additional insertion of the cannula body 100.

[0053] To transition the fixation mechanism 200 and the lights 310 to their second position (FIGS. 1, 6 and 7), a user rotates the collar 210 in the general direction of arrow “B” (FIG. 6) relative to the elongated portion 140 of the cannula body 100, and (e.g., simultaneously) pushes the collar 210 distally in the general direction of arrow “C” (FIGS. 6 and 7). This movement of the collar 210 relative to the elongated portion 140 causes the pins 142 of the elongated portion 140 to move along the respective cam surfaces 211 of the collar 210, from the distal portion 211b, along the connecting portion 211c, and into the proximal portion 211a of the cam surfaces 211 such that the pins 142 are nestled in the detents. The distal movement of the collar 210 also causes the sleeve 215 and proximal ring 216 to move distally relative to the elongated portion 140 and relative to the distal ring 225. Further, as discussed above, this distal movement causes the mid-portion 222 of the expandable member 220 to move in the general direction of arrow “D” (FIG. 6), away from the elongated portion 140. In this position, the surgical access device 10 can be moved proximally relatively to the tissue such that the expandable member 220 engages a distal portion of the tissue wall “T.”

[0054] The lights 310 may be switched on or off by a user via the switch 320 at any stage during use. It may be helpful to have the lights 310 in the on position when the expandable member 220 is in its second, expanded position (FIGS. 1, 6 and 7) and after the distal tip 141 of the elongated portion 140 of the cannula body 100 is with tissue, for instance, to help a user more clearly view the target tissue, as shown in FIGS. 6 and 7.

[0055] Next, in aspects where the anchor 400 is longitudinally movable relative the elongated portion 140 of the cannula body 100, the anchor 400 is moved distally such that the anchor 400 contacts a proximal portion of the tissue wall, thereby sandwiching the tissue wall between the anchor 400 and the expandable member 220, and fixing the longitudinal position of the cannula body 100 relative to the tissue wall.

[0056] FIGS. 8-10 illustrate a second aspect of a fixation mechanism 2000 for use with the surgical access device 10 according to the present disclosure. The fixation mechanism 2000 is positionable around the elongated portion 140 of the cannula body 100 such that such that the fixation mechanism 2000 radially surrounds a portion of the elongated portion 140. More particularly, portions of the fixation mechanism 2000 are longitudinally translatable along the elongated portion 140 between a first position where a proximal part 2110 of a collar 2100 of the fixation mechanism 2000 is farther away from the distal tip 141 of the elongated portion 140 and where a mid-portion 2220 of an expandable member 2200 of the fixation mechanism 2000 is closer to the longitudinal axis “A-A” (FIG. 8), and a second position, where the proximal part 2110 of the collar 2100 is closer to the distal tip 141 of the elongated portion 140 and where the mid-portion 2220 of the expandable member 2200 is farther away from the longitudinal axis “A-A” (FIG. 10). Additionally, the illumination mechanism 300 (including the plurality of lights 310 and the switch 320) and the anchor 400 are usable with the fixation mechanism 2000 in the same or similar manner the illumination mechanism 300 are the anchor 400 are usable with the fixation mechanism 2000, as discussed above with regard to the fixation mechanism 200.

[0057] Various aspects of the fixation mechanism 2000 are the same or similar to those of the fixation mechanism 200, discussed above. Accordingly, only the main differences will be discussed in detail herein.

[0058] With continued reference to FIGS. 8-10, the fixation mechanism 2000 includes the collar 2100, a sleeve 2150 extending distally from the collar 2100, a proximal ring 2160 disposed at a distal end of the sleeve 2150, the expandable member 2200, a distal ring 2250, and a biasing element 2300. A proximal end 2240 of the expandable member 2200 is engaged with (e.g., affixed to) the proximal ring 2160, and a distal end 2260 of the expandable member 2200 is engaged with (e.g., affixed to) the distal ring 2250.

[0059] The collar 2100, the sleeve 2105, and the proximal ring 2160 are longitudinally translatable relative to the elongated portion 140 of the cannula body 100. The lip 141a (FIG. 9) of the distal tip 141 of the elongated portion 140 restricts distal movement of the distal ring 2250 relative to the elongated portion 140. Similar to the fixation mechanism 200 discussed above, distal movement of the proximal end 2240 of the expandable member 2200 relative to the elongated portion 140 causes the mid-portion 2220 of the expandable member 2200 to move away from the longitudinal axis “A-A.”

[0060] The biasing element 2300 (e.g., a compression spring) radially surrounds the elongated portion 140 of the cannula body 100, and is positioned between a distal portion of the proximal housing 120 and a proximal portion of the collar 2100 of the fixation mechanism 2000. The biasing element 2300 biases the collar 2100 distally relative to the elongated portion 140, in the general direction of arrow “D” in FIG. 10, such that the expandable member 2200 is biased towards its second position (FIG. 10). To overcome the bias of the biasing element 2300, a user pulls arms 2140 of the collar 2100 proximally relative to the elongated portion 140, in the general direction of arrow “E” in FIG. 8, such that the expandable member 2200 moves towards its first position (FIG. 8).

[0061] In use, when the fixation mechanism 2000 is in its first position (FIG. 8), corresponding to the expandable member 2200, and the lights 310 being in their first positions, and the biasing element 2300 being in the compressed orientation (e.g., a user is pulling the arms 2140 of the collar 2100 proximally), the distal tip 141 of the elongated portion 140 of the cannula body 100 is inserted through an incision in tissue. Engagement between the anchor 400 and a proximal wall of the tissue prevents additional insertion of the cannula body 100.

[0062] To transition the fixation mechanism 2000 and the lights 310 to their second position (FIG. 10), the user releases the proximal force exerted on the arms 2140, thereby allowing the biasing element 2300 to expand distally into its second orientation, which moves the collar 2100 distally. This distal movement of the collar 2100 relative to the elongated portion 140 causes the sleeve 2150 and proximal ring 2160 to move distally relative to the elongated portion 1400 and relative to the distal ring 2250. Further, as discussed above, this distal movement causes the mid-portion 2220 of the expandable member 2200 to move away from the elongated portion 140. In this position, the surgical access device 10 can be moved proximally relatively to the tissue “T” such that the expandable member 2200 engages a distal portion of the tissue wall (FIG. 10).

[0063] The lights 310 may be switched on or off by a user via the switch 320 at any stage during use. It may be helpful to have the lights 310 in the on position when the expandable member 2200 is in its second, expanded position and after the distal tip 141 of the elongated portion 140 of the cannula body 100 is with tissue, for instance, to help a user more clearly view the target tissue, as shown in FIG. 10.

[0064] Next, in aspects where the anchor 400 is longitudinally movable relative the elongated portion 140 of the cannula body 100, the anchor 400 is moved distally such that the anchor 400 contacts a proximal portion of the tissue wall “T,” thereby sandwiching the tissue wall “T” between the anchor 400 and the expandable member 2200, and fixing the longitudinal position of the cannula body 100 relative to the tissue wall “T.”

[0065] While the above description contains many specifics, these specifics should not be construed as limitations on the scope of the present disclosure, but merely as illustrations of various aspects thereof. Therefore, the above description should not be construed as limiting, but merely as exemplifications of various aspects. Those skilled in the art will envision other modifications within the scope and spirit of the claims appended hereto.