澳大利亚专利AU2013201544A1 Implantable devices including a film providing folding characteristics

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专利摘要:
IMPLANTABLE DEVICES INCLUDING A FILM PROVIDING FOLDING CHARACTERISTICS The present disclosure relates to implantable medical devices (100) which include a film (110) which includes predetermined folding characteristics via predetermined thicknesses (TI, T2, T3) along different areas (101, 102, 103) of the impant (100). 100, 101 10J2 1 o103j 1 00a T 1 102 T21T3
公开号:AU2013201544A1
申请号:U2013201544
申请日:2013-03-11
公开日:2013-10-17
发明作者:Daniel Broom；Amin Elachchabi；Joshua Stopek
申请人:Covidien LP；
IPC主号:A61F2-02

专利说明:
S&F Ref: P065110 AUSTRALIA PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT Name and Address Covidien LP, of 15 Hampshire Street, Mansfield, of Applicant: Massachusetts, 02048, United States of America Actual Inventor(s): Amin Elachchabi Joshua Stopek Daniel Broom Address for Service: Spruson & Ferguson St Martins Tower Level 35 31 Market Street Sydney NSW 2000 (CCN 3710000177) Invention Title: Implantable devices including a film providing folding characteristics The following statement is a full description of this invention, including the best method of performing it known to me/us: 5845c(7213621_1) 1 IMPLANTABLE DEVICES INCLUDING A FILM PROVIDING FOLDING CHARACTERISTICS CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of and priority to U.S. Patent Application No. 61/617,827, filed March 30, 2012, and 13/780,113, filed February 28, 2013, the entire disclosure of which is incorporated by reference herein. FIELD [0002] The present disclosure relates generally to implantable medical devices, and more particularly, to implantable medical devices which include at least one foldable film which includes predetermined folding characteristics. BACKGROUND [0003] Implantable medical devices may be used during both laparoscopic and open surgery for repair of many types of tissue defects and injuries. Some non-limiting examples of such devices include sutures, staples, mesh, films, and the like. Some non-limiting examples of such tissue defects or injuries include hernias, prolapses, fistulas, stomas, and the like. [0004] During surgery, at least one small surgical incision may be made in the tissue to create access into the body. In some instances, the incision may be filled with a surgical device, such as catheter, cannula, trocar and the like, which maintains access into the body. In each instance, the opening in the tissue and/or the opening in the surgical device may not be large enough to allow for the passage of an implantable medical device in its normal configuration. For example, a surgical mesh may be configured to have a width or length which is larger than the diameter of the incision created in the skin to provide access to the herniated tissue. In such instances the mesh may be altered from its original configuration to a smaller configuration so that it may be sufficiently small to pass through the incision. [0005] Upon passing through the smaller incisional opening in a smaller configuration, the implant may need to be returned to its original larger configuration before being properly secured in the tissue. Since, the site of implantation may be small, and in some instances access 2 may be limited, returning the implant to its original larger configuration may be difficult and/or time consuming. Thus, it would be beneficial to provide an implant which includes a film having predetermined folding characteristics which can be easily folded and easily returns to its original unfolded configuration upon implantation. OBJECT [0006] It is the object of the present invention to substantially overcome or ameliorate one or more of the disadvantages of the prior art, or at least provide a useful alternative. SUMMARY [0007] Accordingly, the present disclosure relates to implantable medical devices which include at least one foldable film which includes predetermined folding characteristics. The foldable films described herein may include at least a first area having a first thickness, and a second area having a second thickness different from the first thickness. The first thickness may be the same as or different than the third thickness. In embodiments, the films further include a third area having a third thickness, wherein the second area is positioned between the first and third areas of the film and the second thickness of the second area is less than the first thickness and the third thickness. [0008] In embodiments, the implantable medical devices described herein may include a foldable film which includes a first area having a first thickness and a second area having a second thickness which is less than the first thickness of the first area, wherein the first and second areas alternate along the length of the device. In embodiments, the first and second areas extend along the outer edge of the device. It is envisioned that the films may be fold along the thinner second areas. [0009] In embodiments, the implantable medical devices further include at least one reinforcement member. In addition, the devices described herein may optionally include a slit, aperture, and/or therapeutic agent. [0010] In still other embodiments, the foldable films may be a single layer of different thicknesses. In yet other embodiments, the foldable films may include multiple polymeric layers.
3 [0011] Methods of forming such devices are also disclosed. BRIEF DESCRIPTION OF THE DRAWINGS [0012] The foregoing features and advantages of the disclosure will become more apparent from the reading of the following description in connection with the accompanying drawings, in which: [0013] Fig. 1 A is a top view of an implantable medical device according to at least one embodiment described in the present disclosure; [0014] Figs. I B and IC are a side view of an implantable medical device according to the embodiment shown in Fig. IA; [0015] Fig. 2A is a top view of an implantable medical device according to at least one embodiment described in the present disclosure; [0016] Figs. 2B and 2C are a side view of an implantable medical device according to the embodiment shown in Fig. 2A; [0017] Fig. 3A is a perspective view of an implantable medical device according to at least one embodiment described in the present disclosure; [0018] Figs. 3B and 3C are a side view of an implantable medical device according to the embodiment shown in Fig. 3A; [0019] Fig. 4A is a top view of an implantable medical device according to at least one embodiment described in the present disclosure; [0020] Figs. 4B and 4C are a side view of an implantable medical device according to the embodiment shown in Fig. 4A; [0021] Fig. 5A is a top view of an implantable medical device according to at least one embodiment described in the present disclosure; [0022] Figs. 5B and 5C are a side view of an implantable medical device according to the 4 embodiment shown in Fig. 5A; [0023] Fig. 6A is a top view of an implantable medical device according to at least one embodiment described in the present disclosure; [0024] Figs. 6B and 6C are a side view of an implantable medical device according to the embodiment shown in Fig. 6A; [0025] Fig. 7 is a diagram showing the weave of three sheets forming a reinforcement member according to at least one of the embodiments described in the present disclosure; and [0026] Fig. 8 is a diagrammatic side view of a device permitting the formation of grip members on a reinforcement member according to at least one of the embodiments described in the present disclosure. DETAILED DESCRIPTION [0027] The present disclosure relates to implantable medical devices which include a foldable film having predetermined folding characteristics. The films ability to fold may be determined by changes in thickness along the length of the device. [0028] The foldable films include at least a first area having a first thickness, and a second area having a second thickness different from the first thickness. In embodiments, the films further include a third area having a third thickness, wherein the second area is positioned between the first and third areas of the film and the second thickness of the second area is less than the first thickness and the third thickness. [0029] In embodiments, the films described herein may preferentially fold along the areas which are thinner than the other thicker areas of the implant. It is envisioned that by arranging the thickness of the film at various locations, the films described herein may be made to directionally or preferentially fold into a predetermined configuration. For example, in some embodiments, the films described herein may be folded into a stacked configuration (Fig. IC) which may be useful for passing the folded implant through an opening in the tissue and/or an opening in a surgical device, such as a cannula, catheter, trocar and the like, wherein the opening in the tissue and/or device is smaller than the unfolded configuration of the implant.
5 [0030] Without intending to limit the present disclosure, the difference in thicknesses between the first and second areas of the film is sufficient to allow the implant to fold along the thinner areas of the film. In embodiments, the thickness of the first area and the thickness of the second area may be at a ratio ranging from about 1.5:1 to about 30:1, and in embodiments, from about 2:1 to about 20:1, and still in other embodiments from about 3:1 to about 10:1. [003 1] By implantable, the medical devices described herein may be positioned, for any duration of time, at a location within a body, such as within a portion of the abdominal cavity. Furthermore, the terms "implantation" and "implanted" refer to the positioning, for any duration of time, of a medical device at a location within a body, such as within a portion of the abdominal cavity. [0032] The medical devices described herein include at least one foldable film which may be made from any biocompatible material. Suitable biocompatible materials include bioabsorbable and non-bioabsorbable materials, each of which may comprise synthetic or natural materials. Suitable materials are within the purview of those skilled in the art. [0033] The medical device may further consist of at least one optional ingredient. Some examples of suitable optional ingredients include emulsifiers, viscosity enhancers, dyes, pigments, fragrances, pH modifiers, wetting agents, plasticizers, antioxidants, and the like. The optional ingredients may represent up to about 10% of the mesh and/or film by weight. [0034] In some embodiments, the film may include at least one plasticizer, i.e., glycerol, PEG, etc. For instance, in some embodiments, the film may include collagen, and at least one of PEG and glycerol. [0035] The films described herein may be formed by any suitable method known to those skilled in the art. In certain embodiments, a solution may be formed which includes the suitable polymeric material and any optional ingredients. The solution may be cast, bulk sheet stock, sprayed using an ultrasonic sprayer, extruded, molded and the like, to form the films described herein. Suitable solvents include, without limitation, methylene chloride, chloroform, N methylpyrrolidone, tetrahydrofuran, dimethylformamide, methanol, ethanol, hexanes, acetone, water and combinations thereof.
6 [0036] In certain embodiments, the medical device and in particular, a film portion of the medical device may be created using a spraying technique, such as ultrasonic spraying. Spraying films may result in a unique ability to include a high therapeutic payload of a therapeutic agent. For example, the medical device as described herein may be fabricated by passing a first polymer solution and optionally a second solution containing a therapeutic agent through an ultrasonic spray nozzle to form droplets. The droplets may be mixed while falling towards or being deposited onto an inert substrate, such as silicone sheet, or a portion of a reinforcement member, such as a mesh, to form a film. [0037] In some embodiments, the films include a single layer containing a polymer and a therapeutic agent. In other embodiments, the films include a first layer containing a polymer and a second layer containing a therapeutic agent. In still other embodiments, the films include a tri-layer structure wherein a second layer containing a therapeutic agent is positioned between a first layer containing a polymer and a third layer containing the same or different polymer. [0038] Medical devices of the present disclosure may further comprise a therapeutic agent. The term "therapeutic agent", as used herein, is used in its broadest sense and includes any substance or mixture of substances that provides a beneficial, therapeutic, pharmacological, and/or prophylactic effect. The agent may be a drug which provides a pharmacological effect. The term "drug" is meant to include any agent capable of rendering a therapeutic effect, such as, anti adhesives, antimicrobials, analgesics, antipyretics, anesthetics (e.g. local and systemic), antiepileptics, antihistamines, anti-inflammatories, cardiovascular drugs, diagnostic agents, sympathomimetics, cholinomimetics, antimuscarinics, antispasmodics, hormones, growth factors, muscle relaxants, adrenergic neuron blockers, antineoplastics, immunogenic agents, immunosuppressants, gastrointestinal drugs, diuretics, steroids, lipids, lipopolysaccharides, polysaccharides, platelet activating drugs, clotting factors, and enzymes. It is also intended that combinations of agents may be used. [00391 Other therapeutic agents, which may be included as a drug include: anti-fertility agents; parasympathomimetic agents; psychotherapeutic agents; tranquilizers; decongestants; sedative hypnotics; sulfonamides; sympathomimetic agents; vaccines; vitamins; antimalarials; anti-migraine agents; anti-parkinson agents such as L-dopa; anti-spasmodics; anticholinergic agents (e.g., oxybutynin); antitussives; bronchodilators; cardiovascular agents, such as coronary vasodilators and nitroglycerin; alkaloids; analgesics; narcotics such as codeine, dihydrocodeinone, meperidine, morphine and the like; non-narcotics, such as salicylates, aspirin, 7 acetaminophen, d-propoxyphene and the like; opioid receptor antagonists, such as naltrexone and naloxone; anti-cancer agents; anti-convulsants; anti-emetics; antihistamines; anti inflammatory agents, such as hormonal agents, hydrocortisone, prednisolone, prednisone, non hormonal agents, allopurinol, indomethacin, phenylbutazone and the like; prostaglandins and cytotoxic drugs; chemotherapeutics; estrogens; antibacterials; antibiotics; anti-fungals; anti virals; anticoagulants; anticonvulsants; antidepressants; and immunological agents. [0040] Other examples of suitable agents, which may be included in the films described herein include, for example, viruses and cells; peptides, polypeptides and proteins, as well as analogs, muteins, and active fragments thereof; immunoglobulins; antibodies; cytokines (e.g., lymphokines, monokines, chemokines); blood clotting factors; hemopoietic factors; interleukins (e.g., IL-2, IL-3, IL-4, IL-6); interferons (e.g., p-IFN, a-IFN and y-IFN); erythropoietin; nucleases; tumor necrosis factor; colony stimulating factors (e.g., GCSF, GM-CSF, MCSF); insulin; anti-tumor agents and tumor suppressors; blood proteins such as fibrin, thrombin, fibrinogen, synthetic thrombin, synthetic fibrin, synthetic fibrinogen; gonadotropins (e.g., FSH, LH, CG, etc.); hormones and hormone analogs (e.g., growth hormone); vaccines (e.g., tumoral, bacterial and viral antigens); somatostatin; antigens; blood coagulation factors; growth factors (e.g., nerve growth factor, insulin-like growth factor); bone morphogenic proteins; TGF-B; protein inhibitors; protein antagonists; protein agonists; nucleic acids such as antisense molecules, DNA, RNA, and RNAi; oligonucleotides; polynucleotides; and ribozymes. [0041] Some specific non-limiting examples of water-soluble drugs that may be used in the present foldable films include, lidocaine, bupivicaine, tetracaine, procaine, dibucaine, sirolimus, taxol, chlorhexidine, polyhexamethylene, thiamylal sodium, thiopental sodium, ketamine, flurazepam, amobarbital sodium, phenobarbital, bromovalerylurea, choral hydrate, phenytoin, ethotoin, trimethadione, primidone, ethosuximide, carbamazepine, valproate, acetaminophen, phenacetin, aspirin, sodium salicylate, aminopyrine, antipyrine, sulpyrine, mepirizole, tiaramide, perixazole, diclofenac, anfenac, buprenorphine, butorphanol, eptazocine, dimenhydrinate, difenidol, dl-isoprenaline, chlorpromazine, levomepromazine, thioridazine, fluphenazine, thiothixene, flupenthixol, floropipamide, moperone, carpipramine, clocapramine, imipramine, desipramine, maprotiline, chlordiazepoxide, clorazepate, meprobamate, hydroxyzine, saflazine, ethyl aminobenzoate, chlorphenesin carbamate, methocarbamol, acetylcholine, neostigmine, atropine, scopolamine, papaverine, biperiden, trihexyphenidyl, amantadine, piroheptine, profenamine, levodopa, mazaticol, diphenhydramine, carbinoxamine, chlorpheniramine, 8 clemastine, aminophylline, choline, theophylline, caffeine, sodium benzoate, isoproterenol, dopamine, dobutamine, propranolol, alprenolol, bupranolol, timolol, metoprolol, procainamide, quinidine, ajmaline, verapamil, aprindine, hydrochlorothiazide, acetazolamide, isosorbide, ethacrynic acid, captopril, enalapril, delapril, alacepril, hydralazine, hexamethonium, clonidine, bunitrolol, guanethidine, bethanidine, phenylephrine, methoxamine, diltiazem, nicorandil, nicametate, nicotinic-alcohol tartrate, tolazoline, nicardipine, ifenprodil, piperidinocarbamate, cinepazide, thiapride, dimorpholamine, levallorphan, naloxone, hydrocortisone, dexamethasone, prednisolone, norethisterone, clomiphene, tetracycline, methyl salicylate, isothipendyl, crotamiton, salicylic acid, nystatin, econazole, cloconazole, vitamin BI , cycothiamine, vitamin B2, vitamin B3, vitamin B5, vitamin B6, vitamin B7, vitamin B9, vitamin B12, vitamin C, nicotinic acid, folic acid, nicotinamide, calcium pantothenate, pantothenol, panthetin, biotin, ascorbic acid, tranexamic acid, ethamsylate, protamine, colchicine, allopurinol, tolazamide, glymidine, glybuzole, metoformin, buformin, orotic acid, azathioprine, lactulose, nitrogen mustard, cyclophophamide, thio-TEPA, nimustine, thioinosine, fluorouracil, tegafur, vinblastine, vincristine, vindesine, mitomycin C, daunorubicin, aclarubicin, procarbazine, cisplatin, methotrexate, benzylpenicillin, amoxicillin, penicillin, oxycillin, methicillin, carbenicillin, ampicillin, cefalexin, cefazolin, erythromycin, kitasamycin, chloramphenicol, thiamphenicol, minocycline, lincomycin, clindamycin, streptomycin, kanamycin, fradiomycin, gentamycin, spectinomycin, neomycin, vanomycin, tetracycline, ciprofloxacin, sulfanilic acid, cycloserine, sulfisomidine, isoniazid, ethambutol, acyclovir, gancyclovir, vidabarine, azidothymidine, dideoxyinosine, dideoxycytosine, morphine, codeine, oxycodone, hydrocodone, cocaine, pethidine, fentanyl, polymeric forms of any of the above drugs and any combinations thereof. [0042] In some embodiments, the therapeutic agent may include an anesthetic, i.e., bupivicaine, lidocaine, benzocaine, and the like. [0043] Although the above therapeutic agents have been provided for the purposes of illustration, it should be understood that the present disclosure is not so limited. In particular, although certain therapeutic agents are specifically referred to above, the present disclosure should be understood to include analogues, derivatives and conjugates of such agents.
9 [0044] The therapeutic agent may be combined with any portion of the medical device, including the film and/or the reinforcement member. In some embodiments, the therapeutic agent may be included in the foldable film to provide sustained release of the therapeutic agent following implantation. [0045] The implantable medical devices described herein may also include at least one reinforcement member. Some non-limiting examples of suitable reinforcement members include staple fibers and surgical mesh. The surgical mesh described herein may include porous fabrics made from intertwined filaments. The filaments may extend horizontally and vertically in a manner which produces sections where the filaments cross-over one another creating points of common intersection. The surgical mesh may be woven, non-woven, knitted or braided. In some embodiments, the filaments may form two-dimensional or three-dimensional meshes. Some examples of two-dimensional and/or three-dimensional mesh substrates may be found in U.S. Patent No. 7,021,086, U.S. Patent No. 6,596,002, and U.S. Patent No. 7,331,199, the entire contents of which are incorporated by reference herein. [0046] Suitable meshes for use in the present disclosure include, for example, a collagen composite mesh such as PARIETEXTM Composite Mesh (commercially available from Tyco Healthcare Group LG, d/b/a Covidien). PARIETEXTM Composite Mesh is a 3-dimensional polyester weave with a resorbable collagen film bonded on one side. Another suitable mesh includes Parietex ProgripTM self-fixating mesh (also commercially available from Covidien). Parietex Progrip TM is a polyester mesh which includes poly lactic acid (PLA) grip members. Other suitable meshes include those sold under the names PARIETENE@, PARIETEXTM,
SURGIPRO
TM (all commercially available from Covidien); PROLENE TM (commercially available from Ethicon, Inc.); MARLEX@, DULEX@, 3D MAX@ mesh, PERFIX@ plug, VENTRALEX@, and KUGEL@ patch (all commercially available from C.R. Bard, Inc.); PROLITE TM, PROLITE ULTRA TM (all commercially available from Atrium Medical); COMPOSIX@, SEPRAMESH@, and VISILEX@ (all commercially available from Davol, Inc.); and DUALMESH®, MYCROMESH®, and INFINIT® mesh (all commercially available from W.L. Gore). Additionally, meshes within the scope and context of this disclosure may include biologic materials such as allografts (i.e., AlloDerm@ Regenerative Tissue Matrix from Lifecell), autografts, and xenografts (i.e., PERMACOLTM, from Covidien). In alternate embodiments, processed/purified tissues may also be employed.
10 [0047] In certain preferred embodiments, ParietexTM Composite Mesh or ParietexTM Pro-grip may be utilized in accordance with the present invention. [0048] The reinforcement members may be monofilaments or multi-filaments and, in embodiments, a plurality of multi-filaments may be combined to form yams. It is envisioned that the reinforcement members may be configured to any suitable size and/or shape. The filaments may comprise core/sheath constructs. [0049] In certain embodiments, the reinforcement member may be a surgical mesh knitted on a warp knitting machine, of the tricot or Raschel type, with at least three sheets or warps of yam and as many guide bars. [0050] A rear bar may be threaded, one guide full and one guide empty, with first mono- or multi-filaments 10 of a biocompatible polymer as represented as a solid line in FIG. 7. An intermediate bar is threaded, one guide full, three guides empty, with second mono- or multi-filaments 11 of a biocompatible polymer as represented as a broken line in FIG. 7. The intermediate bar works in such a way as to obtain a zigzag openwork pattern between the columns of meshes. Finally, a front bar is threaded, one guide full, one guide empty, and works in a chain stitch with third mono- or multi-filaments 12 a biocompatible polymer as represented by a thin line in FIG. 7. The third filament 12, i.e., a chain stitch, imprisons first filament 10 and maintains the length of the mesh while contributing to the formation of the mesh with the intermediate sheet formed by the second filament 11. The different filaments may form yams and may be worked according to the following chart: Warp -> Rear bar I Intermediate bar I Front bar III Raschel -> Front bar I Intermediate bar II Rear bar III 7 3 1 7 2 0 3 4 0 4 5 0 1 0 0 4 2 3 3 0 4 5 11 [0051] The rear bar places the first filament or yam in partial weft under the chain stitch and "thrown" onto the needle not forming a chain stitch. For this reason, at the next row, the needle not forming a chain stitch not being supplied permits escape of the filament which forms a loop 14a projecting from the front face of the mesh. [0052] The threading-one guide full, three guides empty-in the intermediate bar, associated with the displacement, makes it possible to form a light ground texture, stable in width, and open-worked to permit good tissue integration. [0053] The mesh 14 thus obtained may be provided with loops 14a (FIG. 8) which may be perpendicular to one of the mesh surfaces. Loops 14a may also include a rigidity and hold at a right angle which may be obtained by the rigidity or nerve of the filaments employed. This rigidity may be necessary for the subsequent formation of grip members which ensure a grip function to at least a portion of the implantable medical device. [0054] On leaving the loom, mesh 14 may be subjected to a thermosetting operation which stabilizes the mesh length and width. The mesh may then be subjected to a phase of formation of the grip members consisting, as is shown in FIG. 8, in passing the mesh over a cylinder 13 containing an electrical heating resistor. Mesh 14 is pressed flat on cylinder 13 by two pairs of rollers, upstream 15a, 15b and downstream 16a, 16b, respectively, which are vertically displaceable for controlling this pressing force. [0055] This control as well as that of the temperature of the resistor placed in cylinder 13 and of the speed of movement of mesh 14 across cylinder 13 make it possible to melt the head of each of loops 14a so that each loop 14a forms two grip members 17. [0056] Each grip member 17 thus may have a substantially rectilinear body protruding perpendicularly with respect to mesh 14 and, at the free end of this body, a head 17a of greater width than that of the body. Head 17a has a generally spheroidal shape or a mushroom shape. Grip member 17 gives mesh 14 the ability to attach to tissue when implanted. In addition, grip members 17 may attach to other portions of mesh 14 when folded or rolled. The grip members may be positioned along any portion of the mesh and in any quantity and/or configuration. For example, in some embodiments, the grip members may be positioned on the same portion of the mesh as the film. In other embodiments, the grip members may be positioned on a different portion of the mesh which does not include the film.
12 [0057] Any biocompatible material may be used to form the reinforcement members described herein. For example, the reinforcement members may be made from non-bioabsorbable materials, bioabsorbable materials and combinations thereof. Suitable materials are within the purview of those skilled in the art. [0058] The reinforcement member and the foldable film may be combined using any suitable method known to those skilled in the art. For example, the reinforcement member may be staple fibers which are combined in a mold with the polymeric film material prior to forming the foldable films. [0059] In some embodiments, the reinforcement member is a mesh material and the foldable film may be cast directly on a portion of the mesh surface. In other embodiments, the film may be spray coated directly on a portion of the mesh. It is envisioned that the thicker areas of the foldable film may be sprayed for a longer duration of time and/or at a higher volume than the thinner areas of the foldable film. In still other embodiments, the film may be formed before being connected to the mesh. In additional embodiments, the foldable film may be positioned within a mold which creates the thicker and thinner portions of the foldable film described herein. Prior to the complete formation of the film, the reinforcement member may be placed in contact with the gelling film material. In some instances the reinforcement member may be completely embedded in the film. In other instances, only a portion of the reinforcement member may be in contact with the foldable film. For example, the outer surface of the reinforcement member, i.e., a mesh, may be placed on top of the gelling film layer without the gelling film layer penetrating into the pores of the mesh. [0060] Turning now to Figs. IA-IC, implantable medical device 100 is illustrated including foldable film 110 including first area 101 having first thickness TI, second area 102 having second thickness T2, and third area 103 having third thickness T3, wherein second area 102 is positioned between first area 101 and third area 103 of the film 110. Second thickness T2 of second area 102 is less than first thickness TI and third thickness T3. Although depicted as being generally the same, the first and third thicknesses may be the same or different, as needed to provide the implant with folding characteristics.
13 [0061] In the folded configuration, first area 101 and third area 103 may be placed adjacent to each other with second area 102 extending between first area 101 and third area 103. It is envisioned that since second area 102 is thinner than first and third areas 101, 103, second area 102 may bend or flex to allow the first and third areas 101, 103 to be folded on top of one another (Fig. IC). However, in some embodiments, second area 102 may be made from a different material than first and third areas 101, 103 which is more flexible than the materials of first and third areas 101, 103. [0062] In Figs. 2A-2C, implantable medical device is illustrated including foldable film 200 including first area 201 having first thickness Tl' and second area 202 having second thickness T2' wherein first and second areas 201, 202 extend around outer edge 207 of film 200a in an alternating manner. Film 200a further include aperture 205 which as shown may be generally centrally located, and slit 204 which extends between a portion of outer edge 207 and aperture 205 to allow tissues, organs, implants and the like to be positioned therein. As shown, first areas 201 and second areas 202 are not positioned around film 200 in a symmetrical pattern. As shown in Fig. 2C, folded film 200 positions first area 201 adjacent second area 202. Thus, in some embodiments, the overall thickness of the folded film is equal to the sum of the first thickness of the first area and the second thickness of the second area. It is envisioned that the dimensions of the first and second areas may be configured to create a snug fit between the first areas and the second areas when the film is folded, thereby temporarily locking the film in a folded configuration. [0063] In some embodiments, the alternating pattern of first and second areas may be symmetrical so when folded the first areas are positioned adjacent to additional first areas (Fig. 5B). [0064] In Figs. 3A-3C, implantable medical device includes foldable film 300 and at least one reinforcement member 306. Reinforcement member 306 is shown as a surgical mesh or textile attached to first, second and third areas 301, 302, 303 of film 300a. In some embodiments, the mesh may be stiffer than at least a portion of the film and may provide tension to the film to return to a generally planar configuration (Figs. 3A-3B) from the folded configuration (Fig. 3C).
14 [0065] As illustrated in Figs. 4A-4C, in some embodiments, reinforcement member 406 may be positioned within second area 402 of foldable film 400. In some embodiments, the addition of reinforcement members 406 may enhance the structural integrity of second area 402 to withstand the repeated folding and unfolding of the implant. [0066] In other embodiments, such as those shown in Figs. 5A-5C, implantable medical device includes multilaminar foldable film 500 which includes reinforcement member 506 positioned within at least one of the multiple layers 501 a-501c of first area 501 which is thicker than second area 502. As shown, reinforcement members 506a-d may be positioned within different layers 50 1 a-c in each of the different first areas 501. [0067] In still other embodiments, such as those depicted in Figs. 6A-6C, implantable medical device includes foldable film 600 which includes reinforcement member 606 extending between first area 601 and third area 603 and spanning second area 602. As shown in Fig. 6C, reinforcement member 606, i.e., surgical mesh, may be positioned between first, second and third areas 601, 602, 603 in the folded configuration. In some embodiments, the mesh may be stiffer than at least a portion of the film and may provide tension to the film to return the film to its original generally planar configuration (Figs. 6A-6B) from the folded configuration (Fig. 6C). [0068] Although shown in a generally planar configuration, the implantable medical devices described herein may not be limited to planar configurations only and may represent non-planar configurations as well. In embodiments, the reinforcement member may assist the implant to return to its original non-planar configuration. [0069] Although shown previously as generally circular, square and/or rectangular in shape, the implants described herein including the film and/or the reinforcement member may be of any shape. [0070] The implants described herein may be useful in many endoscopic, laparoscopic, arthroscopic, endoluminal, transluminal, and/or open surgical procedures. Some examples include hernia repair, repair of vaginal prolapse, ligament repair, tendon repair, and the like. Although the polymeric films described herein may be made from any biocompatible materials, in certain procedures, the film layers may be made from anti-adhesive materials. For example, when implanting the medical devices described herein into tissue near Cooper's ligament, it 15 might be useful to have the flexibility to wrap around or surround the ligament, or any other sensitive tissue such as the spermatic cord, tendons, intestinal tissue, etc. [0071] It will be understood that various modifications may be made to the embodiments disclosed herein. For example, the medical devices described herein may be sterilized and packaged into using any suitable sterilization process, i.e., gamma radiation, and any suitable medical device package, i.e., an injectable medical device package. In other examples, the implants described herein may include more than one film, reinforcement member, aperture, slot, and/or therapeutic agent. Thus, those skilled in the art will envision other modifications within the scope and spirit of the present disclosure.

权利要求:
Claims (24)
[1] 1. An implantable medical device comprising: a foldable film including a first area having a first thickness, a second area having a second thickness, and a third area having a third thickness, wherein the second area is positioned between the first and third areas of the film and the second thickness of the second area is less than the first thickness and the third thickness.
[2] 2. The implantable medical device of claim 1, wherein the first thickness and the third thickness are the same.
[3] 3. The implantable medical device of claim 1, wherein the foldable film comprises a multilaminar film.
[4] 4. The implantable medical device of claim 1, further comprising a reinforcement member.
[5] 5. The implantable medical device of claim 4, wherein the reinforcement member is at least one fiber.
[6] 6. The implantable medical device of claim 4, wherein the reinforcement member is a mesh.
[7] 7. The implantable medical device of claim 4, wherein the reinforcement member is positioned within the first area of the film.
[8] 8. The implantable medical device of claim 4, wherein the reinforcement member is positioned within the second area of the film.
[9] 9. The implantable medical device of claim 4, wherein the reinforcement member is positioned within the third area of the film.
[10] 10. The implantable medical device of claim 4, wherein the reinforcement member extends from the first area of the film to the third area of the film spanning the second area of the film. 17
[11] 11. An implantable medical device comprising: a foldable film including a first area having a first thickness and a second area having a second thickness which is less than the first thickness of the first area, wherein the first and second areas alternate along the length of the device.
[12] 12. The implantable medical device of claim 11, wherein the first thickness and the second thickness are at a ratio ranging from about 2:1 to 20:1.
[13] 13. The implantable medical device of claim 11, wherein the foldable film comprises a multilaminar film.
[14] 14. The implantable medical device of claim 13, further comprising a reinforcement member.
[15] 15. The implantable medical device of claim 14, wherein the reinforcement member comprises a staple fiber.
[16] 16. The implantable medical device of claim 14, wherein the reinforcement member comprises a mesh.
[17] 17. The implantable medical device of claim 14, wherein the reinforcement member is positioned within the first area of the multilaminar film.
[18] 18. The implantable medical device of claim 14, wherein the reinforcement member is positioned within different layers of the second area of the multilaminar film.
[19] 19. The implantable medical device of claim 11, wherein the first areas fold into the second areas of the foldable film.
[20] 20. The implantable medical device of claim 16, wherein the mesh further comprises at least grip member.
[21] 21. The implantable medical device of claim 11, wherein the film further comprises at least one therapeutic agent. 18
[22] 22. An implantable medical device comprising: a foldable film including a first area having a first thickness, a second area having a second thickness, and a third area having a third thickness, wherein the second area is positioned between the first and third areas of the film and the second thickness of the second area is less than at least one of the first thickness and the third thickness.
[23] 23. The implantable medical device of claim 22, wherein the first thickness is greater than the third thickness.
[24] 24. The implantable medical device of claim 22, where the first thickness is less than the third thickness. Covidien LP Patent Attorneys for the Applicant/Nominated Person SPRUSON & FERGUSON

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法律状态:
2016-08-18| MK1| Application lapsed section 142(2)(a) - no request for examination in relevant period|

优先权:

申请号 | 申请日 | 专利标题

US201261617827P| true| 2012-03-30|2012-03-30||

US61/617,827||2012-03-30||

US13/780,113|US10206769B2|2012-03-30|2013-02-28|Implantable devices including a film providing folding characteristics|

US13/780,113||2013-02-28||

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