Spray applicator

CA 02678428 2009-09-11

SPRAY APPLICATOR

BACKGROUND

Technical Field

[0002] The present disclosure relates to spray applicators and methods of mixing two or more components. More particularly, the present disclosure relates to a spray assembly for mixing and applying a bioadhesive.

Background of Related Art

[0003] Polymers and other synthetic materials are currently being developed for use in internal and external wound closure. “Bioadhesives” are known in the art, as are various methods for applying the bioadhesive. Bioadhesives offer many significant advantages over conventional wound closure methods, i.e., using sutures, staples, clips or other suitable mechanical fasteners. Bioadhesives are faster and simpler to apply and have a tendency to promote quicker wound healing with less scarring.

[0004] Most bioadhesives are composed of components that have a tendency to immediately activate and in some instances, rapidly polymerize when combined with one another. Because of this immediate activation and/or rapid polymerization of the bioadhesive, the components comprising the bioadhesive may not be combined until immediately prior to application.

CA 02678428 2009-09-11

[0005] The increased use of endoscopic surgery for even some of the most complex procedures has presented a need for an applicator configured to apply a bioadhesive through an endoscopic port.

SUMMARY

[0006] Provided is a spray assembly for dispensing a mixture. The spray assembly includes a connector configured for operable engagement with a first and a second source of component and a source of pressurized fluid, a tip operably connected to the connector, the tip including an opening and defining a mixing chamber between the distal end of the elongated member and the opening of the tip, and an insert member configured to be received in the mixing chamber, the insert member including a plurality of radially extending slots on at least one end of the insert, the plurality of radially extending slots being configured to mix the first and second components prior to the combination exiting the opening in the tip. The spray assembly may further include an elongated member extending between the connector and the tip, the elongated member having at least a first lumen configured for fluid communication with the first source of component, a second lumen configured for fluid communication with the second source of component, and a third lumen configured for fluid communication with the source of pressurized fluid. The spray assembly may further include a first and a second source of component. The insert member of the spray assembly may include three slots.

[0007] An alternate embodiment of a spray assembly for dispensing a mixture is also provided. The spray assembly includes a connector configured for operable engagement with a first and a second source of component and a source of pressurized fluid, and a tip operably connected to the connector, the tip including an opening and defining a mixing chamber between the distal end of the elongated member and the opening of the tip, the distal end of the mixing

CA 02678428 2009-09-11 chamber including a plurality of radially extending slots formed about the opening, the plurality of radially extending slots being configured to mix the first and second components prior to the combination exiting the opening in the tip. The spray assembly may further include an elongated member extending between the connector and the tip, the elongated member having at least a first lumen configured for fluid communication with the first source of component, a second lumen configured for fluid communication with the second source of component, and a third lumen configured for fluid communication with the source of pressurized fluid,

BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and, together with a general description of the disclosure given above, and the detailed description of the embodiment(s) given below, serve to explain the principles of the disclosure, wherein:

[0009] FIG. 1 is an exploded perspective view of a spray assembly according to the present disclosure;

[0010] FIG. 2 is an enlarged perspective view of the insert and applicator tip of the spray assembly of FIG. 1;

[0011]

[0012]

[0013]

[0014]

[0015]

[0016]

FIG. 3 is a top view of the spray assembly of FIG. 1;

FIG. 4 is a side view of the spray assembly of FIGS. 1 and 3;

FIG. 5 is a cross-sectional end view taken along line 5-5 of FIG. 3;

FIG. 6 is a cross-sectional end view taken along line 6-6 of FIG. 3;

FIG. 7 is a cross-sectional end view taken along line 7-7 of FIG. 3;

FIG. 8 is a cross-sectional end view taken along line 8-8 of FIG. 3;

CA 02678428 2009-09-11

[0017]

[0018]

FIG. 9 is a cross-sectional end view taken along line 9-9 of FIG. 3;

FIG. 10 is a cross-sectional side view of the distal end of the spray assembly of

FIGS. 1 and 3;

[0019]

[0020]

FIG. 11 is a distal end view of the spray assembly of FIGS. 1 and 3;

FIG. 12 is an enlarged cross-sectional side view of the distal end of the applicator tip of FIG. 11;

[0021] FIGS. 13A-D are side view (FIG. 13A), distal end view (FIG. 13B), proximal end view (FIG. 13C), and cross-sectional top view taken along line 13D-13D of FIG. 13A (FIG.

13D) of the insert of FIG. 2;

[0022] FIG. 14 is an alternate embodiment of a spray assembly according to the present disclosure;

[0023] FIG. 15 is an enlarged cross-sectional side view of the distal end of an alternate embodiment of an applicator tip according to the present disclosure; and

[0024] FIG. 16 is an enlarged cross-sectional end view of the applicator tip of FIG. 14 taken along line 16-16 OF FIG. 15.

DETAILED DESCRIPTION

[0025] As shown below in FIGS. 1 and 2, an embodiment of a spray assembly, i.e., a laparoscopic spray assembly, in accordance with the present disclosure is shown generally as spray assembly 10. Spray assembly 10 includes a Y-connector 20, an elongated body portion 30 extending distally from Y-connector 20, and an applicator tip 70 mounted on a distal end of elongated body portion 30. Spray assembly 10 further includes an insert member 80 received between a distal end of elongated body portion 30 and a distal end of applicator tip 70.

CA 02678428 2009-09-11

[0026] Referring now to FIGS. 3 and 4, Y-connector 20 defines a substantially Y-shaped member 21 including first and second proximal extensions 22, 24, an air supply port 26, and a collar 28. Although shown in a substantially planar arrangement, first and second proximal extensions 22, 24 and air supply port 26 may be arranged in any manner. Each of first and second proximal extensions 22, 24 includes a tab 22a, 24a, respectively, for operable engagement with a bayonet coupling (not shown) found on standard syringes. It is envisioned, however, that first and second extensions 22, 24 may configured for coupling with any source of fluid in any manner. First and second proximal extensions 22, 24 may further include component check valves 22b, 24b or other means for selectively regulating the flow from first and second proximal extensions 22, 24 and prevent backflow. First and second component channels 23, 25 extend between first and second proximal extensions 22, 24 and collar 28. An air channel 27 extends between air supply port 26 and collar 28. First and second component channels 23, 25 and/or air channel 27 may be configured to include anti-backflow mechanisms. As will be discussed in further detail below, collar 28 maintains first and second component channels 23, 25 and air supply port 26 in fluid communication with a first and second component lumen 43, 45 and an air lumen 47 (FIG. 6), respectively, formed in inner multi-lumen shaft 40 of elongated body portion 30.

[0027] With reference to FIGS. 5-9, elongated body portion 30 of spray assembly 10 includes an inner multi-lumen shaft 40, an outer sleeve 50 (FIG. 6) surrounding inner shaft 40 and a transition member 60 extending distally from outer sleeve 50 about inner shaft 40. In one embodiment, outer sleeve 50 is rigid while inner multi-lumen shaft 40 and transition member 60 are flexible. Inner shaft 40 and outer sleeve 50 are securely affixed to Y-connector 20 and include a vent lumen 46 (FIG. 6) therebetween. Outer sleeve 50 includes a proximal vent or

CA 02678428 2009-09-11 opening 52a (FIG. 3) and a plurality of distal vents or openings 52b (FIG. 4). Proximal and distal vents 52a, 52b may be of any number, size, configuration and arrangement. Distal vents 52b are in fluid communication with proximal vent 52a via vent lumen 46.

[0028] As discussed above, proximal end 40a of inner shaft 40 engages Y-connector 20 such that first and second component lumen 43, 45 and air lumen 47 align with first and second component channels 23, 25 and air lumen 27 (FIG. 5), respectively. In one embodiment, collar of Y-connector 20 is molded directly around the proximal end of elongated body portion 30. Alternatively, elongated body portion 30 may be selectively engagable with collar 28 such that elongated body portion 30 and collar 28 may be separated and one of the two replaced. In yet another embodiment, elongated body portion 30 may be securely affixed to collar 28 using adhesive, sonic welding or other suitable method. Inner shaft 40 may further includes a wire or other formable material 48 configured to maintain elongated body portion 30 distal of outer sleeve 50 in a desired straight, bent or flexed condition. A proximal end of transition member is received within vent lumen 46 between outer sleeve 50 and inner shaft 40.

[0029] Transition member 60 extends from outer sleeve 50 about inner shaft 40 and may be of any length. Transition member 60 may include a flexible material, thereby permitting inner shaft 40 to be bent and formed. In an alternate embodiment, transition member 60 may be integrally formed with inner shaft 40. In this manner, the portion of inner shaft extending beyond the distal end of outer sleeve 50 would have a larger diameter than the portion of inner shaft 40 within outer sleeve 50. A distal end 60b of transition member 60 may include a groove, threading or other configuration to selectively receive a applicator tip 70.

CA 02678428 2009-09-11

[0030] Turning now to FIGS. 8-12, applicator tip 70 is a tubular member having an open proximal end 70a and a substantially closed distal end 70b. Applicator tip 70 defines an engagement portion 72, a mixing chamber 74 and an outlet 76. Engagement portion 72 is configured to selectively engage distal end 60b of transition member 60. Engagement portion 72 may include grooves, tabs or other configurations corresponding to tabs, grooves and other configurations formed on the distal end of transition member 60. Engagement portion 72 may otherwise be configured to more securely engage the distal end of transition member 60.

[0031] Mixing chamber 74 is an annular cavity in fluid communication with first and second component lumen 43, 45 and air lumen 47 (FIG. 5) of inner shaft 40. Mixing chamber 74 includes a proximal end 74a and outlet 76 on a distal end 74b. Mixing chamber 74 is sized to receive insert 80 immediately adjacent to or flush against distal end 74b. Outlet 76 is formed in distal end 70b of applicator tip 70. Outlet 76 is configured to atomize the combined first and second components. With reference to FIG. 12, in one embodiment, outlet 76, described distally from mixing chamber 74, includes a first annular portion 76a, a first tapered portion 76b, a second annular portion 76c, a second tapered portion 76d and a recessed portion 76e.

Alternative configurations for atomizing a solution are known and have been envisioned for use with spray assembly 10.

[0032] Turning now to FIGS. 13A-13D, insert 80 is defined by a substantially annular body 81 having proximal and distal ends 80a, 80b. Proximal and distal ends 80a, 80b are substantial mirror images of one another. Proximal and distal ends 80a, 80b each define substantially annular recesses 81a, 81b, respectively. In one embodiment, each of proximal and distal ends 80a, 80b further includes a set of slots 82a, 82b. Slots 82a, 82b are included in both proximal and distal ends 80a, 80b in order to simplify the assembly process of spray assembly

CA 02678428 2015-09-25

10. It is envisioned, however, that only one end of insert 80 may include slots. Slots 82a, 82b are equally spaced about respective proximal and distal ends 80a, 80b. Although shown including three slots 82a, 82b, an insert 80 including two or more slots has been envisioned.

Each of slots 82a, 82b defines an opening angling outwardly between a line tangent to recesses 81a, 81b, respectively, and a degrees counter-clockwise from the tangent line. In one embodiment, a is equal to twenty degrees (20°). Slots 82a formed on proximal end 80a are radial offset from slots 82b formed on distal end 80b. Insert 80 includes three spacers 84 equally spaced about and extending longitudinally along annular body 81. As will be discussed in further detail below, spacers 84 align and maintain insert 80 within mixing chamber 74. It is envisioned that insert 80 may include more or less than three spacers 84.

[0033] With reference back to FIG. 10, applicator tip 70 of applicator assembly 10 is shown in an assembled condition. Insert 80 is received immediately adjacent to, or flush against, the distal end of mixing chamber 74 of applicator tip 70. Spacers 84 formed on annular body 81 maintain insert 80 radially centered within distal end 74b of mixing chamber 74. Distal end 60b of transition member 60 is received within engagement portion 72 of applicator tip 70. Mixing chamber 74 is sized such that distal end 60b of transition member 60 and distal end 40b of inner shaft 40 abut insert 80.

[0034] In operation, first and second sources of component (not shown) are connected with first and second proximal extensions 22,24, respectively, formed in Y-connector 20. The first and second components are ejected into first and second component channels 23, 25, respectively, and travel through first and second component lumen 43, 45, respectively formed in inner shaft 40. Air or other gaseous fluid is provided to spray assembly 10 through air supply port 26. In one embodiment, the gas supplied through air supply port 26 is a combination of

CA 02678428 2015-09-25 oxygen (O2) and carbon dioxide (CO2); however, the use of other gases, alone or in combination, is envisioned. The air flows into air channel 27 and through air lumen 47 formed in inner shaft 40. The first and second components and the air provided through Y-connector 20 exit first and second lumen 43,45 and air lumen 47, respectively, at distal end 40b (FIG. 3) of inner shaft 40.

[0035] The first and second components and the air exiting inner shaft 40 encounter proximal end 80a of insert 80. The components and air initially meet as the components and air are forced around insert 80 through the space created by spacers 84 between mixing chamber 74 and annular body 81. When the component/gas combination reaches distal end 80b of insert 80, the combination is further mixed by the turbulent or swirling motion created by slots 82b as the mixture enters recess 81b. The swirling fluid is then ejected from applicator tip 70 through outlet 76 in the form of a cone spray. In the event that distal end 80b of insert 80 is not flush against the distal end of chamber 74, the mixture would not swirl through slots 82b thereby resulting in a jet-like spray through outlet 76. Insert 80 is forced against and maintained flush with the distal end of mixing chamber 74 because of the contact between spacers 84 on annular body 81 and mixing chamber 74. The force of the components and air against insert 80 also maintains insert 80 flush against the distal end of applicator tip 70.

[0036] With reference to FIG. 14, in an alternate embodiment of applicator tip 70, mixing chamber 74 is sized such that insert 80 is longitudinally spaced from distal end 30b of elongated body member 30, thereby forming a cavity for the initial mixing of first and second components prior to encountering insert 80. In one embodiment, applicator tip 70 includes a lip or ridge 72a, to prevent engagement of elongated body portion 30 with insert 80. The first and second components and gas are first combined within proximal end 74a of mixing chamber 74 as the first and second components exit distal end 40b of inner shaft 40. The combined first and second

CA 02678428 2015-09-25 components form a mixture that next encounters proximal end 80a of insert 80. The mixture is forced around insert 80 through the space created by spacers 84 between mixing chamber 74 and annular body 81. When the mixture reaches distal end 80b of insert 80, the mixture is further mixed and swirled by slots 82b as the mixture enters recess 81b. The swirling fluid is then ejected from applicator tip 70 through outlet 76 in the form of a cone spray. As discussed above, in the event that distal end 80b of insert 80 is not flush against distal end 74b of chamber 74, the mixture would not swirl through slots 82b thereby resulting in a jet-like spray. Insert 80 is maintained flush against distal end of mixing chamber 74 by the force of the first and second component and gas flowing against proximal end 80a thereof. Insert 80 is also forced against and maintained flush with distal end of mixing chamber 74 because of contact between spacers 84 on annular body 81 and mixing chamber 74.

[0037] Turning now to FIGS. 15 and 16, distal end 74b of mixing chamber 74 of applicator tip 70 may alternately be configured to include radially extending slots 82c formed about opening 76. Slots 82c are similar in form and function to slots 82a, 82b formed in proximal and distal ends 80a, 80b, respectively of insert 80. As with slots 82a, 82b described hereinabove, slots 82c may be of any number size, configuration or orientation. In a spray assembly utilizing mixing chamber 74 having slots 82c, insert 90 replaces insert 80. Insert 90 is configured to be retained within mixing chamber 74 in a manner similar to insert 80, however, insert 90 does not include slots 82a, 82b. Applicator tip 70, may alternatively be configured to direct the first and second components into slots 82c without insert 90.

[0038J Although the illustrative embodiments of the present disclosure have been described herein with reference to the accompanying drawings, it is to be understood that the disclosure is not limited to those precise embodiments, and that various other changes and

CA 02678428 2015-09-25 modifications may be effected therein by one skilled in the art. For example, it is envisioned that the spray assembly of the present disclosure may be configured to mix and dispense a mixture including more than two components. It is further envisioned that the spray assembly may be configured for connection with more than one gas supply source. The scope of the claims should not be limited by the preferred embodiments set forth herein, but should be given the broadest interpretation consistent with the description as a whole.