# US 7,407,507 B2 · Balloon catheter suited to kissing techniques > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,407,507 B2 - Document ID: US7407507B2 - Status: Granted - Kind: B2 - Application number: 10/868,937 - Filed: 2004-06-17 - Published: 2004-12-23 - Granted: 2008-08-05 - Earliest claimed: 2003-06-18 - Assignees: Nipro Corporation - Inventors: Yasushi Maeda; Masao Horie - Web page: https://patentgrep.com/patent/US7407507B2 ## CPC - A61M 25/1027: {Making of balloon catheters} - A61L 29/085: {Macromolecular materials} - A61L 29/14: Materials characterised by their function or physical properties {, e.g. lubricating compositions} - A61M 25/10: Balloon catheters ({A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02;} inflatable balloons for placing stents or stent-grafts A61F2/958 {; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00}) - A61M 2025/1088: {having special surface characteristics depending on material properties or added substances, e.g. for reducing friction} - 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)} - A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K) ## Abstract A balloon catheter which is good in cross ability and is also good in gripping property so as not to cause slipping during kissing technique includes a tubular body having a balloon 3provided in a distal section 12 of a shaft 1, the shaft 1 being flexible in the distal section 12 and stiff on its proximal side, whereby gripping property and cross ability are adjusted with good balance. Specifically, the gripping property is adjusted to 3.2 N to 6.0 N, and the cross ability is adjusted so that its initial value is not higher than 0.65 N and its middle value is 0.40 N. ## Claims ### Claim 1 A balloon catheter suited to kissing techniques which comprises a tubular body having a balloon provided on a flexible distal section of a shaft, the balloon comprising a most distal end portion, a distal tapered portion, a balloon straight portion, a proximal tapered portion and a most proximal end portion, the shaft comprising a flexible distal section, a transient section and a stiff proximal section, wherein the balloon catheter has (1) a gripping property of 3.2 N to 6.0 N, which is obtained when a balloon having a length of 20 mm and a folding diameter of 0.70 to 0.90 mm is fitted into a polyurethane tube having a diameter of 2.4 mm and a length of 10 mm and the balloon is expanded to a diameter of 2.5 mm and pulled toward a proximal side of said tube at a speed of 250 mm/min in a water bath of 37° C.; and (2) a cross ability of not higher than 0.65 N for the most distal end portion and of not higher than 0.40 N for the straight portion, which values are obtained when a balloon having a length of 20 mm and a folding diameter of 0.70 to 0.90 mm which is expanded to a diameter of 2.5 mm is pushed and inserted into a hole having a diameter of 0.4 mm in a polyurethane film having a thickness of 1 mm at a speed of 500 mm/min in a water bath of 37° C. ### Claim 2 (depends on 1) The balloon catheter according to claim 1, wherein the gripping property is 4.0 N to 6.0 N and the cross ability is not higher than 0.50 N for the most distal end portion and not higher than 0.39 N for the straight portion. ### Claim 3 (depends on 1) The balloon catheter according to claim 1, wherein the balloon straight portion is not lubricated or has a silicone coating formed by applying a 0.5% or less silicone solution thereon. ### Claim 4 (depends on 1) The balloon catheter according to claim 1, wherein the most distal end portion, the distal tapered portion and the balloon straight portion are not lubricated. ### Claim 5 (depends on 1) The balloon catheter according to claim 1, wherein the most distal end portion and the distal tapered portion are lubricated while the balloon straight portion is not lubricated. ### Claim 6 (depends on 1) The balloon catheter according to claim 1, wherein the most distal end and the distal tapered portion have a polyvinylpyrrolidone coating while the balloon straight portion is not lubricated. ### Claim 7 (depends on 1) The balloon catheter according to claim 1, wherein the most distal end portion and the distal tapered portion have a silicone coating formed by applying a 5% or less silicone solution thereon while the balloon straight portion is not lubricated. ### Claim 8 (depends on 1) The balloon catheter according to claim 1, wherein the most distal end portion, the distal tapered portion and the balloon straight portion are lubricated, and the most distal end portion and the distal tapered portion have a silicone coating formed by applying a 5% or less silicone solution thereon and the balloon straight portion has a silicone coating formed by applying a 0.5% or less silicone solution thereon. ### Claim 9 (depends on 1) The balloon catheter according lb claim 1, wherein the most distal end portion, the distal tapered portion and the balloon straight portion are lubricated, and the most distal end portion and the distal tapered portion have a polyvinylpyrrolidone coating formed by applying a polyvinyl solution thereon and the balloon straight portion has a silicone coating formed by applying a 0.5% or less silicone solution thereon. ### Claim 10 (depends on 1) The balloon catheter according to claim 1, wherein the most distal end portion and the distal tapered portion are not lubricated while the balloon straight portion has a silicone coating formed by applying a 0.5% or less silicone solution thereon. ### Claim 11 (depends on 1) The balloon catheter according to claim 1, wherein the balloon is made of a polyamide elastomer. ### Claim 12 (depends on 11) The balloon catheter according to claim 11, wherein the polyamide elastomer is a polyamide/polyether block copolymer consisting of two or more hard segments of polyamide and two or more soft segments of poiyether. ### Claim 13 (depends on 12) The balloon catheter according to claim 12, wherein the polyamide hard segments in the polyamide/polyether block copolymer is a polyamide consisting of C6 or more higher carboxylic acids and C6 or more higher organic diamines, or C6 or more higher aliphatic ω-amino acids, and the polyether soft segments consisting of C2 to C10 diols. ### Claim 14 (depends on 11) The balloon catheter according to claim 11, wherein the polyamide/polyether block copolymer has a Shore D hardness of 60 or more, arid the polyamide hard segments comprise 50% to 95% by weight of the polyamide/polyether block copolymer. ### Claim 15 (depends on 1) The balloon catheter according to claim 1, wherein the shaft comprises, as the flexible distal section, double tubes composed of an inner tube inside an outer tube made of synthetic polymer, and, as the stiff proximal section a single tube made of metallic material, polyimide or polyetherketone and connected with said outer tube.