# US 2019/0314604 A1 · Catheter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0314604 A1 - Document ID: US20190314604A1 - Status: Published application - Kind: A1 - Application number: 16/454,524 - Filed: 2019-06-27 - Published: 2019-10-17 - Earliest claimed: 2015-05-29 - Assignees: Covidien LP - Applicants: Covidien LP - Inventors: Brad Jackson; Rick Williams; John Nguyen; Anthony Huynh - Web page: https://patentgrep.com/patent/US20190314604A1 ## CPC - A61M 25/0053: {having a variable stiffness along the longitudinal axis, e.g. by varying the pitch of the coil or braid} - A61M 25/0012: {with embedded structures, e.g. coils, braids, meshes, strands or radiopaque coils} - A61M 25/0045: {multi-layered, e.g. coated (coating materials A61L29/08)} - B29C 53/00: Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor (B29C61/10 takes precedence) - B29C 63/00: Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor (B29C73/00 takes precedence; by blowing B29C49/00; by thermoforming B29C51/00) - A61B 2017/22079: {with suction of debris} - A61M 25/09: Guide wires - A61M 2025/0042: {Microcatheters, cannula or the like having outside diameters around 1 mm or less} - A61M 2025/0046: {Coatings for improving slidability} - A61M 2025/0057: {Catheters delivering medicament other than through a conventional lumen, e.g. porous walls or hydrogel coatings} - A61M 2025/0059: {having means for preventing the catheter, sheath or lumens from collapsing due to outer forces, e.g. compressing forces, or caused by twisting or kinking} - A61M 2210/0687: Skull, cranium - A61M 2210/12: Blood circulatory system - B29C 63/42: using tubular layers or sheathings - B29K 2027/18: PTFE, i.e. polytetrafluoroethylene {, e.g. ePTFE, i.e. expanded polytetrafluoroethylene} - B29K 2075/00: Use of {PU, i.e.} polyureas or polyurethanes {or derivatives thereof}, as moulding material - B29L 2031/7542: {Catheters} - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS - B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES ## Abstract In some examples, a catheter comprises an inner liner, an outer jacket, and a structural support member positioned between at least a portion of the inner liner and the outer jacket. The inner liner, the outer jacket, and the structural support member define a catheter body that comprises a proximal portion having a first outer diameter, a distal portion having a second outer diameter less than the first outer diameter, the distal portion including a distal end of the catheter body, and a medial portion positioned between the proximal portion and the distal portion, the medial portion tapering from the first outer diameter to the second outer diameter. ## Claims ### Claim 1 A catheter comprising: an inner liner defining an inner lumen; an outer jacket; a structural support member positioned between at least a portion of the inner liner and the outer jacket and defining a plurality of spaces between portions of the structural support member; and a support layer comprising an adhesive, the support layer mechanically connecting the structural support member to the inner liner, wherein the support layer is positioned in the plurality of spaces, and wherein the structural support member and the inner liner are not adhered to the outer jacket with adhesive. ### Claim 2 (depends on 1) The catheter of claim 1, wherein the structural support member comprises a coil defining a plurality of turns, the plurality of turns comprising a first turn and a second turn, a first surface of the first turn of the coil and a second surface of the second turn of the coil defining a space of the plurality of spaces, wherein the support layer is positioned in the space defined by the first surface and the second surface such that the support layer extends from the first surface to the second surface. ### Claim 3 (depends on 1) The catheter of claim 1, wherein the structural support member comprises a braid. ### Claim 4 (depends on 1) The catheter of claim 1, wherein the support layer extends between the inner liner and the outer jacket within the plurality of spaces. ### Claim 5 (depends on 1) The catheter of claim 1, wherein the adhesive is a thermoset adhesive. ### Claim 6 (depends on 5) The catheter of claim 5, wherein the thermoset adhesive comprises a urethane adhesive. ### Claim 7 (depends on 1) The catheter of claim 1, wherein only one structural support member is positioned between the outer jacket and the inner liner. ### Claim 8 (depends on 7) The catheter of claim 7, wherein the inner liner, the outer jacket, and the structural support member define an elongated body, and wherein the structural support member is a single coil that progressively changes in pitch as it extends distally through the elongated body, the single coil being devoid of any joints. ### Claim 9 (depends on 7) The catheter of claim 7, wherein the inner liner, the outer jacket, and the structural support member define an elongated body, and wherein the structural support member is a single coil that progressively changes in pitch as it extends distally through the elongated body, and wherein a first pitch of the single coil in a proximal portion of the elongated body is about 0.00225 inches (about 0.057 mm), a second pitch of the single coil in a medial portion of the elongated body is about 0.00250 inches (about 0.064 mm), a third pitch of the single coil in a distal portion of the elongated body is 0.0030 inches (about 0.076 mm), and a fourth pitch of the single coil in a distal portion of the elongated body is 0.0070 inches (about 0.18 mm). ### Claim 10 (depends on 1) The catheter of claim 1, wherein the outer jacket comprises a plurality of outer jacket sections having different durometers. ### Claim 11 (depends on 1) The catheter of claim 1, wherein the outer jacket comprises a heat-shrinkable material, the outer jacket being heat shrunk over the support layer and the structural support member. ### Claim 12 (depends on 1) The catheter of claim 1, wherein no material is present between at least a portion of the structural support member and the outer jacket. ### Claim 13 (depends on 1) The catheter of claim 1, wherein the support layer is not positioned between the structural support member and the outer jacket. ### Claim 14 (depends on 1) The catheter of claim 1, wherein the inner liner, the outer jacket, and the structural support member define an elongated body, and wherein the outer jacket comprises: a first section decreasing in durometer along a length of the first section in a direction towards a distal end of the elongated body; and a second section more distal than the first section and including the distal end of the elongated body, the second section having a higher durometer than a distal portion of the first section, wherein the second section and the inner liner define a distal opening of the elongated body. ### Claim 15 (depends on 14) The catheter of claim 14, wherein the structural support member extends along the first section of the outer jacket and does not extend along the second section. ### Claim 16 (depends on 14) The catheter of claim 14, wherein a distal tip of the elongated body including the distal end of the elongated body consists essentially of the inner liner and the outer jacket. ### Claim 17 (depends on 14) The catheter of claim 14, further comprising a radiopaque marker coupled to the elongated body, wherein the elongated body distal to the radiopaque marker consists essentially of the inner liner and the outer jacket. ### Claim 18 (depends on 14) The catheter of claim 14, wherein the inner liner extends distally of a proximal end of the second section. ### Claim 19 A catheter comprising: an inner liner defining an inner lumen; an outer jacket; a structural support member positioned between at least a portion of the inner liner and the outer jacket and comprising a coil defining a plurality of turns, the plurality of turns comprising a first turn and a second turn; and a support layer comprising an adhesive, wherein the support layer mechanically connects the structural support member to the inner liner and is positioned in a space defined by a first surface of the first turn of the coil and a second surface of the second turn of the coil such that the support layer extends from the first surface to the second surface, and wherein the structural support member and the inner liner are not adhered to the outer jacket with adhesive. ### Claim 20 (depends on 19) The catheter of claim 19, wherein the adhesive is a thermoset adhesive. ### Claim 21 (depends on 19) The catheter of claim 19, wherein the inner liner, the outer jacket, the coil member, and the support layer define an elongated body, and wherein the outer jacket comprises: a first section decreasing in durometer along a length of the first section in a direction towards a distal end of the elongated body; and a second section more distal than the first section and including the distal end of the elongated body, the second section having a higher durometer than a distal portion of the first section, wherein the second section and the inner liner define a distal opening of the elongated body. ### Claim 22 (depends on 21) The catheter of claim 21, wherein the structural support member extends along the first section of the outer jacket and does not extend along the second section. ### Claim 23 (depends on 21) The catheter of claim 21, further comprising a radiopaque marker coupled to the elongated body, wherein the elongated body distal to the radiopaque marker consists essentially of the inner liner and the outer jacket. ### Claim 24 A catheter comprising: an inner liner; an outer jacket; a coil member positioned between at least a portion of the inner liner and the outer jacket, the coil member defining a plurality of turns comprising a first turn and a second turn; and an adhesive adhering the coil member to the inner liner, wherein the adhesive is positioned in a space defined by a first surface of the first turn of the coil member and a second surface of the second turn of the coil member such that the adhesive extends from the first surface to the second surface, and wherein the coil member and the inner liner are not adhered to the outer jacket with adhesive.