WO2013002286A1 - イントロデューサー用シース - Google Patents
イントロデューサー用シース Download PDFInfo
- Publication number
- WO2013002286A1 WO2013002286A1 PCT/JP2012/066433 JP2012066433W WO2013002286A1 WO 2013002286 A1 WO2013002286 A1 WO 2013002286A1 JP 2012066433 W JP2012066433 W JP 2012066433W WO 2013002286 A1 WO2013002286 A1 WO 2013002286A1
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- WO
- WIPO (PCT)
- Prior art keywords
- sheath
- introducer
- main body
- distal end
- tip
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/06—Body-piercing guide needles or the like
- A61M25/0662—Guide tubes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/06—Body-piercing guide needles or the like
- A61M25/0662—Guide tubes
- A61M2025/0687—Guide tubes having means for atraumatic insertion in the body or protection of the tip of the sheath during insertion, e.g. special designs of dilators, needles or sheaths
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M29/00—Dilators with or without means for introducing media, e.g. remedies
Definitions
- the present invention relates to an introducer sheath.
- Such treatment methods include the method of administering a drug directly to the affected area using the longness of the catheter, and the use of a catheter with a balloon that is expanded by pressurization attached to the tip to push the stenosis in the living body lumen.
- a method of expanding and opening a method of scraping and opening the affected part using a catheter with a cutter attached to the tip, and a method of closing the aneurysm, bleeding site or feeding blood vessel using a catheter.
- a treatment method in which a stent having a tube shape having a meshed side surface is embedded in a living body lumen using a catheter, and the like. is there. Furthermore, there is an aspiration of a liquid that is excessive for the body.
- the introducer sheath When performing treatment / inspection using a catheter, the introducer sheath is generally introduced into the puncture site formed on the arm or leg using a catheter introducer, and the inside of the introducer sheath A catheter or the like is percutaneously inserted into a lesion such as a blood vessel through the cavity.
- TRI Trans Radial intervention
- TFI Trans Femoral intervention
- the introducer sheath is formed from a sheath tube that is a tubular member having a hollow portion through which a long body such as a catheter can be inserted (see Patent Document 1).
- the introducer sheath includes a distal end portion that becomes the distal end side when introduced into the puncture site, and a main body portion that is located on the proximal end side of the distal end portion.
- a uniform phase of the present invention for achieving the above object is an introducer sheath which is formed from a tubular member having a hollow portion through which a long body can be inserted, and which includes a tip portion and a main body portion.
- the introducer sheath is a sheath whose tip is harder than the main body.
- an introducer sheath which is formed of a tubular member having a hollow portion through which a long body can be inserted, and which includes a tip portion and a main body portion.
- the main body portion is formed of a polymer composition containing a crystalline polymer and suppressing a degree of crystallization of the crystalline polymer.
- the tip portion by making the tip portion harder than the main body portion, even when the thickness is reduced, the tip portion can be prevented from being turned over when the introducer sheath is introduced into the puncture site.
- the crushing strength in the axial direction of the tip portion is larger than the crushing strength in the axial direction of the main body portion. In this case, even when the distal end portion is harder than the main body portion and the wall thickness is reduced, turning up of the distal end portion can be suppressed when the introducer sheath is introduced into the puncture site.
- the crystallinity of the tip is greater than the crystallinity of the main body. In this case, even when the distal end portion is harder than the main body portion and the wall thickness is reduced, turning up of the distal end portion can be suppressed when the introducer sheath is introduced into the puncture site.
- the outer diameter of the tip portion is formed to be gradually smaller toward the tip side and the angle with the axial direction is less than 15 degrees. In this case, by making the tip angle of the tip portion sharp, it is possible to make it difficult to turn over when the skin is expanded by the dilator and then inserted into the skin hole.
- the thickness on the base end side in the main body portion is larger than the thickness on the front end side in the main body portion. In this case, by providing a configuration with a firmness, the main body portion is less likely to be broken and kink can be prevented.
- the tubular member can be formed of a single layer made of one material, and the tip can be harder than the main body.
- the tubular member includes a first layer formed from a first material and a second layer formed from a second material softer than the first material, and the first member at the tip portion
- the thickness of the layer is larger than the thickness of the first layer in the main body
- the thickness of the second layer at the tip is smaller than the thickness of the second layer in the main body.
- a thin introducer sheath By securing rigidity at the distal end portion, even a thin introducer sheath can suppress the turning of the distal end portion and improve the insertability into the skin and blood vessels. Moreover, device flexibility, such as a catheter, can be improved by ensuring flexibility in the main body. The main body portion is difficult to break, easily spreads even if it is broken, and easily returns to its original shape even if the sheath kinks after puncturing.
- the tubular member is formed of a mixture of a first material and a second material that is softer than the first material, and is formed in the mixture from the distal end side of the distal end portion toward the proximal end side of the main body portion. It is preferable that the content rate of the first material is reduced and the content rate of the second material is increased. In this case, by changing the content ratios of the first and second materials for each portion along the longitudinal direction of the introducer sheath, a continuous change from rigidity to flexibility from the distal end portion toward the main body portion or It is possible to have an inclination. It is also possible to give a step change or inclination from rigidity to flexibility.
- the distal end of the distal end may be formed only from the first material, and the proximal end of the main body may be formed from only the second material.
- the rigidity of the main body can be ensured by the rigidity of the crystalline polymer itself, and the flexibility of the main body can be ensured by suppressing the degree of crystallization of the crystalline polymer. Therefore, even if the wall thickness is reduced, an introducer sheath that ensures the flexibility of the main body can be obtained.
- the crystalline polymer is polyetheretherketone.
- the polyether ether ketone since the polyether ether ketone has an extremely high rigidity, an introducer sheath that ensures the flexibility of the main body can be obtained even if the wall thickness is reduced.
- the wall thickness of the tubular member is preferably 0.01 to 0.20 mm. In this case, even if the wall thickness is reduced, an introducer sheath that ensures the flexibility of the main body can be obtained.
- FIG. 1 is a plan view showing an introducer assembly to which an introducer sheath according to an embodiment of the present invention is applied.
- FIG. 2 is an exploded plan view showing the introducer sheath and dilator of the introducer assembly.
- FIG. 3 is a view showing a state in which the catheter is inserted through the introducer sheath introduced into the puncture site.
- FIG. 4 is a view showing a state where the introducer sheath is introduced into the puncture site.
- 5A and 5D are cross-sectional views showing a relatively thick introducer sheath
- FIGS. 5B and 5C are cross-sectional views showing a relatively thin introducer sheath. is there.
- FIG. 6A is a cross-sectional view showing the introducer sheath according to the embodiment
- FIG. 6B is a schematic view showing the magnitude relationship between the hardness of the distal end portion and the hardness of the main body portion in the introducer sheath
- 6C is a schematic diagram showing the magnitude relationship between the crushing strength in the axial direction of the tip portion and the crushing strength in the axial direction of the main body portion
- FIG. 6D shows the crystallinity of the tip portion and the main body. It is a schematic diagram which shows the magnitude relationship with the crystallinity degree of a part.
- FIG. 7 is a schematic view showing a method for measuring the crushing strength in the axial direction of the distal end portion of the introducer sheath.
- FIG. 7 is a schematic view showing a method for measuring the crushing strength in the axial direction of the distal end portion of the introducer sheath.
- FIG. 8 is a cross-sectional view showing the sheath tip.
- FIG. 9 is a cross-sectional view showing an introducer sheath with improved kink resistance of the main body.
- FIG. 10 is a cross-sectional view showing a material that forms a sheath tube and is formed of a plurality of layers formed from different materials.
- FIGS. 11A and 11B are schematic diagrams showing the contents of the first and second materials in the mixture, which are the materials forming the sheath tube.
- the introducer assembly 10 is a device for securing an access route into a living body lumen.
- proximal end side the proximal operation unit side of the device
- distal end side the side inserted into the living body lumen
- FIG. 1 is a plan view showing an introducer assembly 10 to which an introducer sheath 20 according to an embodiment of the present invention is applied.
- FIG. 2 shows an introducer sheath 20 and a dilator 30 of the introducer assembly 10.
- 3 is an exploded plan view
- FIG. 3 is a diagram showing a state where the catheter 70 is inserted through the introducer sheath 20 introduced into the puncture site
- FIG. 4 is a diagram showing the introducer sheath 20 at the puncture site. It is a figure which shows the state introduced.
- the introducer assembly 10 generally includes an introducer sheath 20 and a dilator 30.
- the introducer sheath 20 includes a sheath tube 21, a sheath hub 22 attached to the proximal end side of the sheath tube 21, and a hemostasis valve 23 attached to the proximal end side of the sheath hub 22.
- the dilator 30 includes a dilator tube 31 and a dilator hub 32 attached to the proximal end side of the dilator tube 31.
- introducer assembly 10 after introducing introducer sheath 20 to the puncture site, dilator 30 is removed, and a long body such as catheter 70 is passed through the lumen of introducer sheath 20. The skin is inserted into a lesion such as a blood vessel.
- introducer assembly 10 will be described in detail.
- the introducer sheath 20 is placed in a living body lumen, and is inserted into a living body lumen by inserting a long body such as a catheter 70, a guide wire, or an embolus into the inside thereof. is there.
- the sheath tube 21 is percutaneously introduced into the body lumen.
- the constituent material of the sheath tube 21 will be described later.
- a side port 24 that communicates with the inside of the sheath tube 21 is formed in the sheath hub 22.
- One end of a flexible tube 25 made of polyvinyl chloride, for example, is liquid-tightly connected to the side port 24.
- a three-way cock 26 is attached to the other end of the tube 25.
- a liquid such as physiological saline is injected from the port of the three-way cock 26 into the introducer sheath 20 through the tube 25.
- the constituent material of the sheath hub 22 is not particularly limited, but a hard material such as a hard resin is suitable.
- a hard material such as a hard resin
- Specific examples of the hard resin include polyolefin such as polyethylene and polypropylene, polyamide, polycarbonate, polystyrene, and the like.
- the hemostasis valve 23 is formed of an elastic member having a substantially elliptical film shape (disc shape), and is fixed to the sheath hub 22 in a liquid-tight manner.
- the constituent material of the hemostasis valve 23 is not particularly limited, and examples thereof include silicone rubber, latex rubber, butyl rubber, and isoprene rubber which are elastic members.
- the dilator 30 is used to prevent the sheath tube 21 from being broken or to enlarge the skin perforation when the introducer sheath 20 is inserted into the blood vessel.
- the dilator tube 31 is inserted into the sheath tube 21. As shown in FIG. 1, the tip 33 of the dilator tube 31 protrudes from the tip of the sheath tube 21.
- Examples of the constituent material of the dilator tube 31 include polyolefin (eg, polyethylene, polypropylene, polybutene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer, or a mixture of two or more of these), polyolefin Elastomer, cross-linked polyolefin, polyvinyl chloride, polyamide, polyamide elastomer, polyester, polyester elastomer, polyurethane, polyurethane elastomer, fluororesin, polycarbonate, polystyrene, polyacetal, polyimide, polyetherimide, and other polymer materials or mixtures thereof Can be used.
- polyolefin eg, polyethylene, polypropylene, polybutene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer, or a mixture of two or more of these
- the dilator hub 32 is detachably held with respect to the sheath hub 22.
- the constituent material of the dilator hub 32 is not particularly limited, but a hard material such as a hard resin is suitable.
- a hard material such as a hard resin
- Specific examples of the hard resin include polyolefin such as polyethylene and polypropylene, polyamide, polycarbonate, polystyrene, and the like.
- the distal side 20a is required to be stiff in order to improve the insertability into the skin, while the proximal side 20b is In order to improve insertability, flexibility is required. Further, the base end side 20b is required to be flexible from the viewpoint of being difficult to break and easily spreading even if it is broken and easily returning to its original shape even if the sheath is kinked after puncturing.
- the outer diameter dimension ⁇ 3 is set to be the same while the inner diameter dimension ⁇ 1 is kept the same.
- the size can be reduced by 1 Fr ( ⁇ 2> ⁇ 3).
- the inner diameter dimension is kept the same as the outer diameter dimension ⁇ 2.
- ⁇ 4 becomes large ( ⁇ 4> ⁇ 1), and a long body having a larger outer diameter can be inserted.
- the size can be reduced by 1 Fr ( ⁇ 2> ⁇ 3).
- the inner diameter dimension is kept the same as the outer diameter dimension ⁇ 2.
- ⁇ 4 becomes large ( ⁇ 4> ⁇ 1), and a long body having a larger outer diameter can be inserted.
- the application range is expanded as follows. Since the outer diameter of the sheath (7Fr size) inserted through the 7Fr size device was larger than the radial diameter of the radial artery (about 2.9 ⁇ 0.6 mm), the TRI procedure was performed using a device such as the 7Fr size catheter 70. could not do.
- the outer diameter can be reduced by 1 Fr while maintaining the same inner diameter (6 Fr size). This makes it possible to perform a TRI procedure using a 7Fr size device.
- a device having an outer diameter of 7Fr can be inserted into a sheath having an outer diameter of 6Fr. In this specification, such a combination of device size and sheath size is expressed as “7 in 6”.
- the combination of device size and sheath size is not limited to “7 in 6”, and can be applied to all Fr.
- “11in10”, “10in9”, “9in8”, “8in7”, “7in6”, “6in5”, “5in4”, “4in3”, “3in2” are reduced by 1Fr. can do.
- the outer diameter of the sheath is, for example, about ⁇ 1.39 mm.
- the insertion mark of the human body is reduced and the hemostasis time is shortened. This shortens the time spent in the hospital, which reduces the physical burden on the hospital as well as the physical burden on the patient.
- the outer diameter can be reduced by 1 Fr while keeping the inner diameter the same.
- the tip cannot be used as a sheath due to turning or buckling.
- the waist strength and rigidity are lost, and it quickly kinks.
- the sheath tip is turned over, when the introducer sheath is introduced into the puncture site, the sheath tip is thin, so the sheath tip material may stretch and roll outside the sheath tip. Can be mentioned.
- buckling of the sheath tip refers to a phenomenon in which when the introducer sheath is introduced into the puncture site, longitudinal pressure is applied to the sheath tip, causing the sheath to deform laterally. The case where the sheath bends in the shape of a bellows.
- the introducer sheath 20 according to the present embodiment that solves the above-described problems when the wall thickness is reduced will be described in detail.
- FIG. 6A is a cross-sectional view showing the introducer sheath 20
- FIG. 6B is a schematic view showing the magnitude relationship between the hardness of the distal end portion 50 and the hardness of the main body portion 60 in the introducer sheath 20
- FIG. 6C is a schematic diagram showing the magnitude relationship between the crushing strength in the axial direction of the tip 50 and the crushing strength in the axial direction of the main body 60
- FIG. 6D shows the crystallization of the tip 50.
- FIG. 6 is a schematic diagram showing the magnitude relationship between the degree and the crystallinity of the main body 60.
- the introducer sheath 20 is generally formed from a sheath tube 21 (corresponding to a tubular member) having a hollow portion 21a through which a long body such as a catheter 70 can be inserted. And a sheath tip 50 (corresponding to the tip) and a sheath body 60 (corresponding to the body).
- the sheath tip 50 and the sheath body 60 are integrally formed by integral molding or the like, and are preferably not joined by adhesion, fusion, or the like.
- the sheath distal end portion 50 has a tapered portion 51 that is tapered and a straight portion 52 that extends substantially parallel to the axis.
- the sheath tip 50 is formed to be harder than the sheath body 60 (see FIG. 6B).
- the sheath distal end portion 50 By making the sheath distal end portion 50 harder than the sheath main body portion 60, the sheath distal end portion 50 can be prevented from being turned up when the introducer sheath 20 is introduced into the puncture site even if the thickness is reduced. .
- the sheath tip 50 being harder than the sheath body 60 specifically means that the crushing strength in the axial direction of the sheath tip 50 is greater than the crushing strength in the axial direction of the sheath body 60. (See FIG. 6C).
- the mechanical characteristics of the sheath tip 50 and the sheath body 60 are different, but it is preferable that the characteristics gradually shift at the boundary. It is preferable that the hardness gradually changes at the boundary between the sheath tip 50 and the sheath body 60. It is preferable that the crushing strength in the axial direction gradually changes at the boundary between the sheath tip 50 and the sheath body 60. It is preferable that the crystallinity gradually changes at the boundary between the sheath tip 50 and the sheath body 60. As a result, it is possible to eliminate a sudden change in mechanical properties at the boundary, and to suppress kinks when the introducer sheath 20 is introduced into the puncture site.
- the constituent material of the sheath tube 21 is not limited to the polymer composition containing the crystalline polymer, and a normal material can be applied.
- the constituent material of the sheath tube 21 include polyolefin (for example, polyethylene, polypropylene, polybutene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer, or a mixture of two or more thereof), polyolefin elastomer, and the like.
- Polyolefin cross-linked products polyvinyl chloride, polyamide, polyamide elastomer, polyester, polyester elastomer, polyurethane, polyurethane elastomer, fluororesin, polycarbonate, polystyrene, polyacetal, polyimide, polyetherimide and other polymer materials or mixtures thereof Can be used.
- An ethylene tetrafluoroethylene copolymer (ETFE) can be suitably used.
- FIG. 7 is a schematic diagram showing a method for measuring the axial crushing strength of the sheath tip 50.
- the processed product 71 at the distal end of the sheath is cut to 7 cm, and vertically fixed to the autograph manufactured by Shimadzu Corporation with a chuck.
- a metal core equivalent to the inner diameter of the sheath or a dilator cut is inserted into the sheath tube. Leave a gap of about 15 mm from the sheath tip.
- the urethane sheet 72 is placed under the fixed sheath tip processed product 71 and pressed vertically at a speed of 5 mm / min to measure the strength when the tip is crushed.
- the atmosphere in the laboratory was room temperature (RT (Room Temperature) of about 23 ° C.) and relative humidity (RH (Relativistic Humidity) of about 50%).
- RT Room Temperature
- RH Relativistic Humidity
- the sheath tip 50 being harder than the sheath body 60 means that the crystallinity of the sheath tip 50 is greater than the crystallinity of the sheath body 60 (FIG. 6 ( See D)).
- the amorphous tube is formed as follows.
- the first molding method when a polymer composition containing a crystalline polymer is extruded, it is rapidly cooled in a die to form an amorphous tube.
- the cylinder molding temperature is from the melting point of the polymer to the melting point of the polymer plus about 150 ° C., and the die temperature is from 50 to 300 ° C.
- a polymer composition containing a crystalline polymer is extruded and then rapidly cooled in a water tank to form an amorphous tube.
- the cylinder molding temperature is from the melting point of the polymer to the melting point of the polymer plus about 150 ° C., the die temperature is 100 to 300 ° C., and the water bath temperature is 0 to 80 ° C.
- PEEK polyether ether ketone
- Tg glass transition point
- Tm melting point
- the annealing is usually performed at a temperature several tens of degrees lower than the melting point Tm.
- first molding method molding is performed at a temperature several tens of degrees higher than the glass transition point Tg. This reduces the crystallinity.
- second molding method even if the molding is performed at a temperature several tens of degrees lower than the melting point Tm, the crystallinity is lowered by quenching the molded tube by placing it in a water tank.
- a mold having a recess having an inner surface shape that matches the taper shape of the sheath tip 50 is used.
- the mold is heated by a high frequency power source.
- the tip of the sheath tube 21 is pushed into the recess of the mold.
- the inner shape of the recess is transferred to the distal end of the sheath tube 21, and a tapered portion 51 whose outer surface is tapered is formed at the sheath distal end portion 50.
- the crystallinity at the sheath distal end 50 to which heat and pressure are applied is higher than the crystallinity at the sheath main body 60.
- the sheath material is PEEK (polyetheretherketone)
- the mold temperature is preferably a glass transition point Tg or higher and a melting point Tm plus 150 ° C. or lower.
- the crystallinity of the crystalline polymer can be measured by, for example, X-ray diffraction, thermal analysis, density method, infrared method, nuclear magnetic resonance absorption method and the like.
- the molecular structure includes at least a crystalline region, and a crystalline region and an amorphous region may be mixed.
- the resin generally used for the introducer sheath is mainly a fluorine-based resin such as ethylenetetrafluoroethylene copolymer (ETFE) or FEP, or a general-purpose resin such as PE.
- ETFE ethylenetetrafluoroethylene copolymer
- PE general-purpose resin
- engineer plastic or super engineering plastic that is not generally used for the sheath material is used.
- PEEK Polyetheretherketone
- PEK Polyetherketone
- PEKK Polyetherketoneketone
- PEEKK Polyether
- PPS polyphenylene sulfide
- PES polyethersulfone
- PSF polysulfone
- PI polyimide
- PEI polyetherimide
- PAR amorphous polyarylate
- fibrous reinforcing materials for example, glass fibers, carbon fibers, whiskers, mica, aramid fibers, acrylic fibers, polyester fibers, etc.
- fibrous reinforcing materials for example, glass fibers, carbon fibers, whiskers, mica, aramid fibers, acrylic fibers, polyester fibers, etc.
- FRP fluorescence-activated polymer
- FRTP GFRP
- GFRTP GFRTP
- CFRP CFRTP
- CFRTP CFRTP
- BFRP BFRTP
- KFRP KFRTP
- KFRTP a compound in which PTFE, ETFE or the like is compatible with these super engineering plastics is also useful.
- engineer plastics such as nylon (polyamide), polycarbonate, polyacetal, polyphenylene ether, polybutylene terephthalate, and the like can be given.
- FIG. 8 is a cross-sectional view showing the sheath tip 50.
- the introducer sheath 20 is formed such that the outer diameter ⁇ a of the sheath tip 50 gradually decreases toward the tip.
- the angle ⁇ formed by the sheath tip 50 with respect to the axial direction is preferably less than 15 degrees. More preferably, it is 5 degrees.
- distal end angle of the sheath distal end portion 50 By making the distal end angle of the sheath distal end portion 50 sharp, it is possible to make it difficult to turn over when inserted into the skin hole after the skin is expanded by the dilator 30.
- the angle of the sheath tip 50 is more preferably 10 degrees or less.
- the wall thickness is about 70 ⁇ m, insertion into the skin is difficult when the sheath tip angle is 15 degrees, but when it is 5 degrees, insertion into the skin becomes easy.
- FIG. 9 is a cross-sectional view showing the introducer sheath 20 in which the kink resistance of the sheath body 60 is improved.
- the thickness t2 on the proximal end side of the sheath main body 60 is larger than the thickness t1 on the distal end side of the sheath main body 60.
- the thickness t2 on the proximal end side in the sheath main body 60 is made larger than the thickness t1 on the distal end side in the sheath main body 60 to give the stiffness. With such a configuration, the sheath body 60 is less likely to be broken and kink can be prevented.
- drawing of molten resin or correction by a mold can be cited.
- the present invention may be applied to a tube made of a multilayer material.
- the sheath tube 21 is formed of a single layer made of one material, and the sheath tip 50 can be made harder than the sheath body 60 by any of the measures described above.
- FIG. 10 is a cross-sectional view showing a material that forms the sheath tube 21 and is formed of a plurality of layers formed of different materials.
- a material 80 forming the sheath tube 21 includes a first layer 81 formed of a first material and a second layer formed of a second material softer than the first material. Layer 82.
- the thickness of the first layer 81 at the sheath tip 50 is larger than the thickness of the first layer 81 at the sheath body 60, and the thickness of the second layer 82 at the sheath tip 50 is the first thickness at the sheath body 60.
- the thickness of the second layer 82 is smaller.
- the material forming the sheath tube 21 has a three-layer structure of outer layer / intermediate layer / inner layer, and each of the first material is a rigid material / second material is a flexible material / first material. It is formed from a rigid material / that is a material.
- each layer along the longitudinal direction of the introducer sheath By changing the thickness of each layer along the longitudinal direction of the introducer sheath 20, it is possible to make the rigid material rich on the distal end side and the flexible material rich on the proximal end side. In other words, the ratio of the rigid material on the distal end side in the thickness direction is larger than that on the proximal end side. Accordingly, it is possible to give a stepwise change or inclination from rigidity to flexibility from the sheath distal end portion 50 toward the proximal end side of the sheath main body portion 60. It is also possible to have a continuous change or inclination from rigidity to flexibility.
- the sheath distal end portion 50 by securing rigidity at the sheath distal end portion 50, even if the sheath 20 for the introducer is thin, the sheath distal end portion 50 is prevented from being turned over, and the skin or blood vessel can be prevented. It is possible to improve the insertion property. Further, by ensuring the flexibility toward the proximal end portion in the sheath main body portion 60, it is possible to improve the device passability of the catheter 70 and the like. The sheath main body 60 is not easily broken, and is easily spread even if it is broken. Therefore, even if the sheath kinks after puncturing, there is an advantage that it easily returns to the original shape (kink restoring property).
- FIG. 11 (A) and 11 (B) are schematic diagrams showing the contents of the first and second materials in the mixture, which are the materials forming the sheath tube 21.
- FIG. 11 (A) and 11 (B) are schematic diagrams showing the contents of the first and second materials in the mixture, which are the materials forming the sheath tube 21.
- the material 85 forming the sheath tube 21 is a mixture of a first material and a second material that is softer than the first material.
- the sheath tube 21 is a single-layer tube formed from this mixture.
- the content rate 86 of the 1st material in a mixture falls from the front end side in the sheath front-end
- the end on the distal end side of the sheath distal end portion 50 is formed only from a rigid material that is the first material, and the end on the proximal end side of the sheath main body portion 60 is composed only of the flexible material that is the second material. Is formed.
- the distal end side is made rich in the rigid material and the proximal end side is made rich in the flexible material. can do. Accordingly, it is possible to have a continuous change or inclination from rigidity to flexibility from the sheath distal end portion 50 toward the proximal end side of the sheath main body portion 60. It is also possible to give a step change or inclination from rigidity to flexibility.
- the rigid material rich indicates a state where the content of the rigid material is high
- the flexible material rich indicates a state where the content of the flexible material is high.
- FIG. 11A The way of changing from a rigid material rich to a flexible material rich changes through a form in which the ratio of both gradually changes (see FIG. 11A) and a state 88 in which both resins are compatible.
- FIG. 11B There are several forms (see FIG. 11B).
- the content ratio 86 of the first material in the mixture decreases from the distal end side of the sheath distal end portion 50 toward the proximal end side of the sheath main body portion 60, and the second The material content 87 is increased.
- the first material in the material 85 extends from the distal end of the sheath distal end portion 50 toward the proximal end of the sheath main body portion 60 as shown in FIG.
- the thickness of the member 86 made of this material decreases, and the thickness of the member 87 made of the second material in the material 85 increases.
- the material 85 is configured from the distal end of the sheath distal end portion 50 toward the proximal end of the sheath main body portion 60 as shown in FIG.
- the content ratio 86 of the first material of the mixture decreases, and the content ratio 87 of the second material of the mixture constituting the material 85 increases.
- the content ratio 86 of the first material in the mixture decreases from the distal end side of the sheath distal end portion 50 toward the proximal end side of the sheath main body portion 60, and both resins are compatible.
- the content ratio 87 of the second material increases. That is, as shown in FIG. 11B, the thickness of the member 86 made of the first material in the material 85 decreases from the distal end of the sheath distal end portion 50 to the proximal end of the sheath main body portion 60, and the material 85 The thickness of the member 87 made of the second material is increased, and at the boundary surface between the member 86 made of the first material and the member 87 made of the second material, both members are in a fixed state. A layer having a thickness is formed.
- the content ratios 86 and 87 can be adjusted by an extrusion technique.
- a sheath tube forming material by securing rigidity at the sheath distal end portion 50, even if the sheath 20 for the introducer is thin, curling of the sheath distal end portion 50 is suppressed, and the skin or blood vessel can be prevented. It is possible to improve the insertability. In addition, by ensuring flexibility toward the proximal end portion in the sheath main body portion 60, it is possible to improve the device passability of the catheter 70 and the like. The sheath main body 60 is not easily broken and easily spread even if it is broken. Therefore, even if the sheath kinks after puncturing, there is an advantage that it easily returns to the original shape (kink restoring property).
- the following configuration can also be employed.
- the introducer sheath 20 is formed from a sheath tube 21 (corresponding to a tubular member) having a hollow portion 21a through which a long body such as a catheter 70 can be inserted, and includes a sheath distal end portion 50 and a sheath main body portion 60.
- the sheath body 60 is formed of a polymer composition that includes a crystalline polymer and suppresses the degree of crystallization of the crystalline polymer.
- the rigidity of the sheath body 60 can be ensured by securing the rigidity of the sheath body 60 by the rigidity of the crystalline polymer itself and suppressing the degree of crystallization of the crystalline polymer. Therefore, it is possible to obtain the introducer sheath 20 that ensures the flexibility of the sheath body 60 while reducing the thickness of the sheath body 60.
- the first molding method or the second molding method described above including the rapid cooling process may be applied. Moreover, it may replace with a rapid cooling process or you may make it add the chemical
- the degree of crystallization that is suppressed by the crystalline polymer varies depending on the tube diameter, wall thickness, length, etc., so it is not uniquely determined, and the optimum degree of crystallization is selected by trial and error. . Therefore, it is not necessary to specify the degree of suppressed crystallization using the crystallinity.
- Polyether ether ketone PEEK
- PEEK Polyether ether ketone
- the wall thickness of the sheath tube 21 is 0.01 to 0.20 mm, preferably 0.03 to 0.15 mm.
- the inner diameter of the sheath tube 21 is 0.10 to 5.00 mm.
- the introducer sheath 20 of the present invention has been described based on the illustrated embodiment, but the present invention is not limited to this.
- FIG. 10 shows a form having a three-layer structure as the material 80 for forming the sheath tube 21, but it may have a two-layer structure or a four-layer or five-layer structure.
- distal end side end portion of the sheath distal end portion 50 is formed only from the rigid material that is the first material
- proximal end side end portion of the sheath main body portion 60 is formed only from the flexible material that is the second material.
- An example is shown (FIG. 11), but the first and second materials may be included at each end.
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- Pulmonology (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
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Abstract
Description
イントロデューサー組立体10は、生体管腔内へのアクセスルートを確保するためのデバイスである。なお、以下の説明において、デバイスの手元操作部側を「基端側」、生体管腔内へ挿通される側を「先端側」と称す。
20 イントロデューサー用シース、
21 シースチューブ(管状部材)、
21a 中空部、
30 ダイレーター、
50 シース先端部(先端部)、
60 シース本体部(本体部)、
81 第1の層、
82 第2の層、
86 第1の材料の含有率、
87 第2の材料の含有率、
φa シース先端部の外径。
Claims (12)
- 長尺体を挿通自在な中空部を備える管状部材から形成され、先端部と本体部とを備えるイントロデューサー用シースであって、前記先端部が前記本体部よりも硬いイントロデューサー用シース。
- 前記先端部の軸方向の押し潰し強度が、前記本体部の軸方向の押し潰し強度よりも大きい請求項1に記載のイントロデューサー用シース。
- 前記先端部の結晶化度が、前記本体部の結晶化度よりも大きい請求項1または請求項2に記載のイントロデューサー用シース。
- 前記先端部の外径が先端側に向かって漸次小さく形成され、軸方向との角度が15度未満である請求項1~請求項3の何れか1つに記載のイントロデューサー用シース。
- 前記本体部における基端側の肉厚が、前記本体部における先端側の肉厚よりも大きい請求項1~請求項4の何れか1つに記載のイントロデューサー用シース。
- 前記管状部材が、一の材料から形成された単層である請求項1~請求項5の何れか1つに記載のイントロデューサー用シース。
- 前記管状部材は、第1の材料から形成された第1の層と、第1の材料よりも柔らかい第2の材料から形成された第2の層とを含み、前記先端部における前記第1の層の厚みが前記本体部における前記第1の層の厚みよりも大きく、前記先端部における前記第2の層の厚みが前記本体部における前記第2の層の厚みよりも小さい請求項1~請求項5の何れか1つに記載のイントロデューサー用シース。
- 前記管状部材は、第1の材料と、第1の材料よりも柔らかい第2の材料との混合物によって形成され、前記先端部における先端側から前記本体部における基端側に向かって前記混合物中の前記第1の材料の含有率が低下し、かつ、前記第2の材料の含有率が増加する請求項1~請求項5の何れか1つに記載のイントロデューサー用シース。
- 前記先端部における先端側の端部は第1の材料のみから形成され、前記本体部における基端側の端部は第2の材料のみから形成されている請求項8に記載のイントロデューサー用シース。
- 長尺体を挿通自在な中空部を備える管状部材から形成され、先端部と本体部とを備えるイントロデューサー用シースであって、前記本体部が、結晶性ポリマーを含み結晶性ポリマーの結晶化の程度を抑制したポリマー組成物から形成されてなるイントロデューサー用シース。
- 前記結晶性ポリマーが、ポリエーテルエーテルケトンである請求項10に記載のイントロデューサー用シース。
- 前記管状部材の肉厚が、0.01~0.20mmである請求項10または請求項11に記載のイントロデューサー用シース。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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CN201280032057.9A CN103648572B (zh) | 2011-06-29 | 2012-06-27 | 插管器用鞘 |
EP12805274.3A EP2727622B1 (en) | 2011-06-29 | 2012-06-27 | Sheath for introducer |
JP2013522913A JP6007175B2 (ja) | 2011-06-29 | 2012-06-27 | イントロデューサー用シース |
AU2012276660A AU2012276660B2 (en) | 2011-06-29 | 2012-06-27 | Sheath for introducer |
US14/139,075 US10086172B2 (en) | 2011-06-29 | 2013-12-23 | Introducer sheath |
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JP2011144697 | 2011-06-29 | ||
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US14/139,075 Continuation US10086172B2 (en) | 2011-06-29 | 2013-12-23 | Introducer sheath |
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WO2013002286A1 true WO2013002286A1 (ja) | 2013-01-03 |
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US (1) | US10086172B2 (ja) |
EP (1) | EP2727622B1 (ja) |
JP (1) | JP6007175B2 (ja) |
CN (1) | CN103648572B (ja) |
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WO (1) | WO2013002286A1 (ja) |
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Also Published As
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JP6007175B2 (ja) | 2016-10-12 |
US10086172B2 (en) | 2018-10-02 |
EP2727622A1 (en) | 2014-05-07 |
CN103648572B (zh) | 2016-04-27 |
JPWO2013002286A1 (ja) | 2015-02-23 |
EP2727622B1 (en) | 2019-06-12 |
US20140114290A1 (en) | 2014-04-24 |
AU2012276660B2 (en) | 2016-08-11 |
CN103648572A (zh) | 2014-03-19 |
AU2012276660A1 (en) | 2014-01-09 |
EP2727622A4 (en) | 2015-08-12 |
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