WO2020047876A1 - 一种支架输送系统 - Google Patents

一种支架输送系统 Download PDF

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Publication number
WO2020047876A1
WO2020047876A1 PCT/CN2018/104737 CN2018104737W WO2020047876A1 WO 2020047876 A1 WO2020047876 A1 WO 2020047876A1 CN 2018104737 W CN2018104737 W CN 2018104737W WO 2020047876 A1 WO2020047876 A1 WO 2020047876A1
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WO
WIPO (PCT)
Prior art keywords
tube
stent
diameter
handle
delivery system
Prior art date
Application number
PCT/CN2018/104737
Other languages
English (en)
French (fr)
Inventor
郑忠伟
严航
Original Assignee
上海医立泰生物科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 上海医立泰生物科技有限公司 filed Critical 上海医立泰生物科技有限公司
Priority to EP18932500.4A priority Critical patent/EP3777783A4/en
Priority to US16/980,565 priority patent/US11684499B2/en
Priority to JP2020541651A priority patent/JP7015495B2/ja
Priority to PCT/CN2018/104737 priority patent/WO2020047876A1/zh
Publication of WO2020047876A1 publication Critical patent/WO2020047876A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
    • A61F2/9517—Instruments specially adapted for placement or removal of stents or stent-grafts handle assemblies therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
    • A61F2/962—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
    • A61F2/966—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
    • A61F2/962—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
    • A61F2/966—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
    • A61F2002/9665—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod with additional retaining means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0039—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in diameter

Definitions

  • the invention relates to the field of medical equipment, in particular to a stent delivery system.
  • commercial or general esophageal stent release pushers generally include a combination of components such as an adjustment handle, a fixed handle, a handle, an outer tube, an inner tube, a thin tube, a stent cavity, a compression stent, and a guide.
  • the stent is placed in the cavity formed by the outer tube and the thin tube (called the stent cavity), and the inner tube and the thin tube move with each other.
  • the length of the stent cavity can be adjusted to meet the needs of different lengths of stent.
  • the compression bracket between the thin and outer tube is gradually released and opened.
  • Chinese Patent Application No. CN200520070630.2 discloses a covered stent conveyor.
  • the conveyor is mainly composed of an outer sleeve and an inner core.
  • the outer sleeve is sheathed outside the inner core, and the inner core is composed of a guide and a shaft core.
  • the tube and the conveying rod are connected, the front end of the axial tube is connected to the guide head, and the rear end of the axial tube is connected to the conveying rod.
  • a bracket is placed on the axial core tube, and the outer sleeve presses the bracket on the axial core tube.
  • the utility model can conveniently enter the lumen, reduce the difficulty of stent release, improve the accuracy of stent delivery, and can help patients to extend the survival period and improve the quality of life.
  • FIG. 201310010362.4 discloses an esophageal stent conveyor, including an outer sheath tube, a core tube, a push tube, a guide head, a development identification ring, a radiopaque marker ring, a front handle, a rear handle and a safety lock.
  • the sleeve is characterized in that it is provided with a compression sleeve and a tension sleeve.
  • a positioning hole and a recovery hole are sequentially arranged between the perforation of the outer sheath tube at the center of the front handle and the locking screw hole.
  • the rear end portion of the inner wall of the positioning hole is arrayed along the axial circumference.
  • a clamping groove is provided.
  • the compression sleeve is fixedly connected by a ring top, a large cylindrical sleeve body and a positioning small cylindrical sleeve along the same axis.
  • the inner end of the ring top is provided with a tapered positioning hole.
  • the tensioning sleeve is composed of a cylindrical fixing sleeve body and a tapered table body at the front end of the cylindrical fixing sleeve body.
  • the tensioning sleeve is provided with tensioning through grooves along an axial circumferential array along one end of the tapered table body, and the compression sleeve And the tension sleeve are respectively sleeved on the push tube, one end of the tension sleeve is connected with the safety lock sleeve through the fixed sleeve body, and the other end corresponds to the compression sleeve, the compression sleeve is at the rear end of the outer sheath tube and is fixed in front On the handle, it has novel structure, fast operation and accurate judgment. Withdrawing resistance, short operation time, little pain and so on.
  • the Chinese patent document of application number CN201539751.2 discloses a controllable esophageal stent release pusher, which includes an esophageal stent release pusher, which includes an adjustment handle, a fixed handle, a handle, an outer tube, an inner tube Tube, thin tube, guide, stent cavity, stent; the outer tube is provided with a scale; the stent cavity is composed of the inner tube distal end, the proximal end of the guide head and the outer tube.
  • the stent cavity is provided with a stent and the proximal end of the stent cavity
  • a thin tube is provided, and the thin tube is communicated with the seeker; the thin tube is provided with a hole, the bracket is provided with a coil, and the adjusting handle is fixedly connected with the silk thread, and the silk thread is sleeved with the coil through the hole.
  • the utility model can controllably and accurately release the esophageal stent to the narrow place of the esophagus, and the stent can be released and recovered freely, which greatly improves the success rate and accuracy of the esophageal stent release, and reduces the occurrence of complications.
  • the above stent conveyors need to place the stent in the cavity of the stent in advance. Once placed, the stent is no longer easily removed and cannot be used immediately. In this way, if long-term transportation or long waiting is required, the stent It has been placed in the stent conveyor for a long time, and the expansion and expansion force of the stent will be affected for a long time, and it will not be easy to quickly restore the natural tension, which will affect the effect of the operation.
  • the invention discloses a stent delivery system, including:
  • the outer sleeve assembly includes an outer sleeve body, an outer sleeve handle fixed at the rear end of the outer sleeve body, and an outer sleeve tip connected to the front end of the outer sleeve body.
  • An outer through hole is provided with an axial through hole having the same diameter as the inner diameter of the outer sleeve body. The outer diameter of the tube tip decreases stepwise from back to front;
  • the inner sleeve assembly includes a pushing tube sleeved in the outer sleeve body, an inner sleeve handle fixed at the rear end of the pushing tube, a bracket placing tube connected to the front end of the pushing tube, and an inner sleeve tip provided at the front end of the bracket placing tube.
  • the outer diameter of the tube is adapted to the inner diameter of the outer tube to provide an axial pushing force.
  • the outer diameter of the pushing tube is larger than the outer diameter of the stent placement tube.
  • An axial through hole with the same diameter as the inner diameter of the stent placement tube is provided in the tip of the inner sleeve.
  • the outer diameter of the rear end is fitted with the outer diameter of the front end of the outer tube tip, and the outer diameter gradually decreases from the rear end to the front end;
  • the retaining ring is fixed on the outer wall of the pushing tube between the outer sleeve handle and the inner sleeve handle.
  • the outer sleeve body includes a front bracket cover tube and a rear outer jacket cover tube, and the length of the bracket cover tube is not less than the length of the bracket placement tube in the inner sleeve assembly, which is used for sheathing the bracket placement tube.
  • the outside of the tube covers the built-in stent.
  • the inner diameter of the stent-covered tube is larger than the inner diameter of the outer-covered tube.
  • the outer cover handle includes a gripping portion and a non-slip portion, and the gripping portion and the non-slip portion are detachably connected as a whole, and the connection method is screwing or snapping or the gripping portion and the non-slip portion are integrally formed.
  • the non-slip portion is provided with a plurality of protrusions along its outer periphery, and the protrusions are linear or curved, or the outer surface of the non-slip portion is provided with multiple protrusions.
  • the front and back ends of the outer handle are hemispherical.
  • bracket placing tube and the pushing tube of the inner casing assembly are connected through a connecting member, and the connecting member includes a thin diameter portion of the inserted bracket placing tube, a thick diameter portion of the inserted pushing tube, and a pushing member located between the two.
  • a through hole is provided in the pushing table. The inner diameter of the through hole is smaller than the inner diameter of the small diameter portion and the large diameter portion.
  • the inner sleeve handle includes a sphere portion and a handle portion, the rear end of the sphere portion is hemispherical, and the outer diameter of the handle portion gradually decreases from back to front.
  • the push tube and the stent placement tube have an instrument channel and a water inlet channel, and the push tube portion of the outer tube handle and the inner sleeve handle is provided with a water inlet connector.
  • a developing ring is provided on the outer periphery of the front end of the pushing tube.
  • the stent delivery system of the present invention is provided with an outer tube tip at the front end of the outer tube body, and the outer diameter of the outer tube tip decreases stepwise from back to front, which is convenient for the stent receiving tube of the stent auxiliary introduction device.
  • the stent receiving tube head end part is sleeved on the front end of the outer tube tip with a small outer diameter.
  • the front surface of the head end of the stent receiving tube abuts on the stepped surface of the outer tube tip,
  • the thicker outer diameter of the tube body provides thrust to make the outer tube recede along the axial direction, and the exposed stent placement tube enters the stent receiving tube, thereby transferring the stent from the stent receiving tube to the stent placing tube without lengthening in advance.
  • the stent is placed on the stent conveyor in time, which can be used immediately, which is very convenient to use.
  • the outer diameter of the push tube of the present invention is larger than the outer diameter of the stent placement tube, which can reduce the distance between the push tube and the outer casing. The gap increases the driving force of the pushing tube.
  • the present invention has high practical value.
  • FIG. 1 is a schematic diagram of the overall structure of a stent delivery system disclosed in each embodiment of the present invention
  • FIG. 2 is a cross-sectional view of a tip of an outer sleeve disclosed in various embodiments of the present invention
  • FIG. 3 is a schematic diagram of the overall structure of an outer sleeve body disclosed in Embodiment 2 of the present invention.
  • FIG. 4 is a schematic diagram of the overall structure of another stent delivery system disclosed in each embodiment of the present invention.
  • FIG. 5-1 is a schematic diagram of an overall structure of a connector disclosed in Embodiment 3 of the present invention.
  • 5-2 is a cross-sectional view of the connecting member disclosed in the third embodiment of the present invention.
  • a first embodiment of the present invention discloses a stent delivery system 100 including an outer sleeve assembly 1, the outer sleeve assembly 1 includes an outer sleeve body 11, an outer sleeve handle 12 fixed to a rear end of the outer sleeve body, and Outer casing tip 13 at the front end of the outer casing body, an axial through hole having the same diameter as the inner diameter of the outer casing body is provided in the outer casing handle 12, and the outer diameter of the outer casing tip 13 decreases stepwise from back to front; the inner casing assembly 2.
  • Tube tip 24 (not shown in Figure 1), the outer diameter of the push tube 21 is adapted to the inner diameter of the outer sleeve body 11 to provide an axial pushing force.
  • the outer diameter of the push tube 21 is larger than the outer diameter of the stent placement tube 23, and the inner sleeve tip
  • An axial through hole having the same diameter as the inner diameter of the stent placement tube 23 is provided in 24, and the outer diameter of the rear end is fitted with the outer diameter of the front end of the outer tube tip 13 and the outer diameter gradually decreases from the rear end to the front end;
  • the outer diameter of the outer tube tip 13 is reduced stepwise from back to front, which is convenient to cooperate with the stent receiving tube of the stent auxiliary introduction device.
  • the stent receiving tube head is used during use.
  • the end portion is sleeved on the front end 131 with a thin outer diameter at the tip of the outer sleeve.
  • the front surface of the head end of the holder receiving tube abuts on the stepped surface 130 of the outer sleeve tip, and the outer diameter of the outer sleeve tip is thicker.
  • the 132 provides thrust to make the outer sleeve body 11 recede in the axial direction, and the exposed stent placement tube 23 enters the stent accommodation tube, and the stent already placed in the stent accommodation tube can be transferred from the stent accommodation tube to the stent placement tube 23 Therefore, it is not necessary to place the stent on the stent conveyor for a long time in advance, and it can be used immediately, which is very convenient to use.
  • connection manner of the outer tube tip 13 and the outer tube body 11 is bonding or screwing, or engaging connection through interference fit, etc., and is not limited to the methods listed in this embodiment.
  • the outer cover handle 12 may include a gripping portion and a non-slip portion, and the gripping portion may be designed as an arc-shaped cylinder with a slight depression in the middle, which conforms to the grip curve of a human hand and is convenient for the operator to hold.
  • the anti-slip part may be a non-slip structure provided along the outer periphery of the outer cover handle 12, and the non-slip structure may be a plurality of linear protrusions, or various designs that can increase the coefficient of friction, such as a plurality of curved types Bumps, bumps, etc.
  • grip part and the anti-slip part of the outer cover handle 12 of this embodiment may be detachably connected as a whole, such as by screwing, snapping, etc., or may be an integrally formed handle, according to the actual situation Need to design and processing costs.
  • the front end and the rear end of the outer cover handle 12 are hemispherical. This design makes the transition curve between the various parts of the outer cover handle 12 smooth and smooth, which is convenient to hold and does not injure people's hands while avoiding damage to the hands. Practical value Very high.
  • the inner sleeve handle 22 may include a sphere portion at the rear end and a shank portion connected in front of the sphere portion.
  • the rear end of the sphere portion is hemispherical, similar to the outer sleeve handle described above.
  • the hemispherical design makes the inner sleeve handle
  • the transition curve between the various parts of 22 is smooth and smooth, which is convenient to hold and does not injure people's hands while avoiding damage to the hands. It has high practical value.
  • the outer diameter of the handle gradually decreases from back to front, which can increase the stress intensity between the inner sleeve handle and the push tube, and has a beautiful appearance.
  • an axial instrument channel and a water inlet channel are provided inside the pushing tube 21 and the stent placing tube 23 communicating therewith.
  • the pushing tube between the outer sleeve handle 12 and the inner sleeve handle 22 The outer wall of 21 is provided with a water inlet connector 20 which communicates with the water inlet channel.
  • the instrument channel can be used to insert a guide wire or the like to the patient's site.
  • the water inlet connector can be connected to an external pump to inject and pump water through the water inlet channel.
  • the inner sleeve assembly 2 of this embodiment may also be provided with more axial channels for simultaneous insertion of two instruments for surgical operations, or may be provided with separate independent water inlet channels and water outlet channels to inject water separately. And pumping.
  • a developing ring 25 can be provided on the outer periphery of the front end of the pushing tube 21 of this embodiment.
  • the developing ring 25 is displaced as the pushing tube 21 is pushed and pulled, and can be coordinated with X-rays for development positioning, thereby helping medical staff to judge in real time.
  • the design of the outer tube tip 13 is beneficial to cooperate with the stent receiving tube of the stent auxiliary introduction device, and it is not necessary to place the stent on the stent conveyor for a long time in advance, and it can be used immediately. It is very convenient to use.
  • a second embodiment of the present invention discloses a stent delivery system 100 including an outer sleeve assembly 1.
  • the outer sleeve assembly 1 includes an outer sleeve body 11, an outer sleeve handle 12 fixed to a rear end of the outer sleeve body, and Outer casing tip 13 at the front end of the outer casing body, an axial through hole having the same diameter as the inner diameter of the outer casing body is provided in the outer casing handle 12, and the outer diameter of the outer casing tip 13 decreases stepwise from back to front; the inner casing assembly 2.
  • the outer diameter of the push tube 21 and the outer diameter of the push tube 21 are adapted to provide an axial pushing force.
  • the outer diameter of the push tube 21 is larger than the outer diameter of the stent placement tube 23.
  • the inner sleeve tip 24 is provided with the stent placement.
  • the inner diameter of the tube 23 is equal to the axial through hole.
  • the outer diameter of the rear end is fitted with the outer diameter of the front end of the outer tube tip 13 and the outer diameter gradually decreases from the rear end to the front end.
  • the retaining ring 3 is fixed to the outer cover.
  • This embodiment is a modification of the first embodiment.
  • the difference between this preferred embodiment and the first embodiment is that in this embodiment, the inner diameter of the stent-covered tube 11a is larger than the inner diameter of the outer-covered tube 11b, as shown in FIG.
  • the beneficial effects of this design are: on the one hand, the cavity space formed between the stent covering tube 11a and the stent placing tube 13 is sufficient, and the expansion force of the self-expanding stent need not be excessively compressed to accommodate its expansion force; On the one hand, the gap between the outer sheathing tube 11b and the pushing tube 21 becomes smaller, which is conducive to increasing the pushing force of the pushing tube 21, making the pushing and pulling of the pipe body more convenient and labor-saving.
  • the outer cover handle 12 may include a gripping portion and a non-slip portion, and the gripping portion may be designed as an arc-shaped cylinder with a slight depression in the middle, which conforms to the grip curve of a human hand and is convenient for the operator to hold.
  • the anti-slip part may be a non-slip structure provided along the outer periphery of the outer cover handle 12, and the non-slip structure may be a plurality of linear protrusions, or various designs that can increase the coefficient of friction, such as a plurality of curved types Bumps, bumps, etc.
  • gripping portion 12a and the non-slip portion 12b of the outer cover handle 12 of this embodiment may be detachably connected as a whole, such as by screwing, snapping, etc., or may be an integrally formed handle. Design according to actual needs and processing costs.
  • the front end and the rear end of the outer cover handle 12 are hemispherical. This design makes the transition curve between the various parts of the outer cover handle 12 smooth and smooth, which is convenient to hold and does not injure people's hands while avoiding damage to the hands. Practical value Very high.
  • the inner sleeve handle 22 may include a body portion at the rear end of the ball and a handle portion connected in front of the ball portion.
  • the rear end of the ball portion is semi-spherical, similar to the outer sleeve handle described above.
  • the hemispherical design makes the inner sleeve
  • the transition curve between the various parts of the handle 22 is smooth and smooth, which is convenient to hold and does not injure people's hands, avoids causing damage to the hands, and has high practical value.
  • the outer diameter of the handle gradually decreases from back to front, which can increase the stress intensity between the inner sleeve handle and the push tube, and has a beautiful appearance.
  • an axial instrument channel and a water inlet channel are provided inside the pushing tube 21 and the stent placing tube 23 communicating therewith.
  • the pushing tube between the outer sleeve handle 12 and the inner sleeve handle 22 The outer wall of 21 is provided with a water inlet connector 20 which communicates with the water inlet channel.
  • the instrument channel can be used to insert a guide wire or the like to the patient's site.
  • the water inlet connector can be connected to an external pump to inject and pump water through the water inlet channel.
  • the inner sleeve assembly 2 of this embodiment may also be provided with more axial channels for simultaneous insertion of two instruments for surgical operations, or may be provided with separate independent water inlet channels and water outlet channels to inject water separately. And pumping.
  • a developing ring 25 can be provided on the outer periphery of the front end of the pushing tube 21 of this embodiment.
  • the developing ring 25 is displaced as the pushing tube 21 is pushed and pulled, and can be coordinated with X-rays for development positioning, thereby helping medical staff to judge in real time.
  • the third embodiment of the present invention discloses a stent delivery system 100.
  • the stent delivery system 100 includes an outer sleeve assembly 1.
  • the outer sleeve assembly 1 includes an outer sleeve body 11, an outer sleeve handle 12 fixed to a rear end of the outer sleeve body, and Outer casing tip 13 at the front end of the outer casing body, an axial through hole having the same diameter as the inner diameter of the outer casing body is provided in the outer casing handle 12, and the outer diameter of the outer casing tip 13 decreases stepwise from back to front; the inner casing assembly 2.
  • the outer diameter of the push tube 21 and the outer diameter of the push tube 21 are adapted to provide an axial pushing force.
  • the outer diameter of the push tube 21 is larger than the outer diameter of the stent placement tube 23.
  • the inner sleeve tip 24 is provided with the stent placement.
  • the inner diameter of the tube 23 is equal to the axial through hole.
  • the outer diameter of the rear end is fitted with the outer diameter of the front end of the outer tube tip 13 and the outer diameter gradually decreases from the rear end to the front end.
  • the retaining ring 3 is fixed to the outer cover.
  • This embodiment is different from the previous embodiment in that, as shown in FIG. 1, FIG. 5-1, and FIG. 5-2, in this embodiment, the bracket placing tube 23 and the pushing tube 21 of the inner sleeve assembly 2 are connected by The connecting piece 26 is connected with the connecting piece 26, which includes a small-diameter portion 26a for inserting the bracket placing tube, a large-diameter portion 26b for inserting the pushing tube, and a pushing table 26c located between the two.
  • the pushing table 26c has a through hole therein. The through-hole communicates the small-diameter portion 26a and the large-diameter portion 26b, and the inner diameter of the through-hole is smaller than the inner diameter of the small-diameter portion and the large-diameter portion.
  • the bracket placing tube 23 is embedded in the small diameter portion 26a and abuts on the front surface of the pushing table 26c, and the pushing tube 21 is embedded in the large diameter portion 26b and abuts on the rear surface of the pushing table 26c.
  • the through hole of the pushing table 26c holds the bracket
  • the lumen of the placing tube 23 and the pushing tube 21 communicate with each other.
  • the inner diameters of the through holes of the pushing tube 21, the pushing table 26c, and the stent placing tube 23 are equal, so as to form a smooth transition lumen, which can constitute an instrument channel. Or water inlet channel.
  • the outer cover handle 12 may include a gripping portion and a non-slip portion, and the gripping portion may be designed as an arc-shaped cylinder with a slight depression in the middle, which conforms to the grip curve of a human hand and is convenient for the operator to hold.
  • the anti-slip part may be a non-slip structure provided along the outer periphery of the outer cover handle 12, and the non-slip structure may be a plurality of linear protrusions, or various designs that can increase the coefficient of friction, such as a plurality of curved types Bumps, bumps, etc.
  • grip part and the anti-slip part of the outer cover handle 12 of this embodiment may be detachably connected as a whole, such as by screwing, snapping, etc., or may be an integrally formed handle, according to the actual situation Need to design and processing costs.
  • the front end and the rear end of the outer cover handle 12 are hemispherical. This design makes the transition curve between the various parts of the outer cover handle 12 smooth and smooth, which is convenient to hold and does not injure people's hands while avoiding damage to the hands. Practical value Very high.
  • the inner sleeve handle 22 may include a sphere portion at the rear end and a shank portion connected in front of the sphere portion.
  • the rear end of the sphere portion is hemispherical, similar to the outer sleeve handle described above.
  • the hemispherical design makes the inner sleeve handle
  • the transition curve between the various parts of 22 is smooth and smooth, which is convenient to hold and does not injure people's hands while avoiding damage to the hands. It has high practical value.
  • the outer diameter of the handle gradually decreases from back to front, which can increase the stress intensity between the inner sleeve handle and the push tube, and has a beautiful appearance.
  • an axial instrument channel and a water inlet channel are provided inside the pushing tube 21 and the stent placing tube 23 communicating therewith.
  • the pushing tube between the outer sleeve handle 12 and the inner sleeve handle 22 The outer wall of 21 is provided with a water inlet connector 20 which communicates with the water inlet channel.
  • the instrument channel can be used to insert a guide wire or the like to the patient's site.
  • the water inlet connector can be connected to an external pump to inject and pump water through the water inlet channel.
  • the inner sleeve assembly 2 of this embodiment may also be provided with more axial channels for simultaneous insertion of two instruments for surgical operations, or may be provided with separate independent water inlet channels and water outlet channels to inject water separately. And pumping.
  • a developing ring 25 can be provided on the outer periphery of the front end of the pushing tube 21 of this embodiment.
  • the developing ring 25 is displaced as the pushing tube 21 is pushed and pulled, and can be coordinated with X-rays for development positioning, thereby helping medical staff to judge in real time.
  • a concave ring 26d is provided on the outer peripheral wall of the connecting member 26, and the developing ring 25 can be embedded in the concave ring 26d, so that the position of the developing ring is fixed, and it will not be caused by repeated push-pull friction between the outer sleeve body and the inner sleeve pushing tube. Falling off reduces the risk of instrument damage.
  • the connecting member of this embodiment connects the pushing tube with a relatively large outer diameter and the placing tube with a relatively small outer diameter, which not only increases the stability of the connection, but also smoothly transitions between the inner walls of the inner cavity formed inside, There is no step ups and downs between each other, so that the guide wire can be smoothly pushed along the inner cavity without obstruction, no bending deformation will occur, the convenience of surgical operation is increased, and the injury of the instrument or the human body is reduced.
  • the stent delivery system of the present invention is provided with an outer tube tip at the front end of the outer tube body, and the outer diameter of the outer tube tip decreases stepwise from back to front, which is convenient for the stent receiving tube of the stent auxiliary introduction device.
  • the stent receiving tube head end part is sleeved on the front end of the outer tube tip with a small outer diameter.
  • the front surface of the head end of the stent receiving tube abuts on the stepped surface of the outer tube tip,
  • the thicker outer diameter of the tube body provides thrust to make the outer tube recede along the axial direction, and the exposed stent placement tube enters the stent receiving tube, thereby transferring the stent from the stent receiving tube to the stent placing tube without lengthening in advance.
  • the stent is placed on the stent conveyor in time, which can be used immediately, which is very convenient to use.
  • the outer diameter of the push tube of the present invention is larger than the outer diameter of the stent placement tube, which can reduce the distance between the push tube and the outer casing. The clearance of the tube increases the pushing force of the push tube, which has high practical value.

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Abstract

一种支架输送系统（100），包括外套管组件（1）、内套管组件（2）和卡位环（3），外套管组件（1）包括外套管体（11）和连接于外套管体（11）前端的外套管尖端（13），外套管尖端（13）的外径自后向前呈台阶状减小，内套管组件（2）包括内套于外套管体（11）中的推送管（21）、连接于推送管（21）前端的支架放置管（23）和设置于支架放置管（23）前端的内套管尖端（24），推送管（21）的外径大于支架放置管（23）的外径；在外套管体（11）的前端设置有外套管尖端（13），外套管尖端（13）的外径自后向前呈台阶状减小，与支架辅助导入装置的支架容纳管相配合，能够快速方便地将支架自支架容纳管中转移到支架放置管（23）上，可即用即放，使用十分方便；另外，减小了推送管（21）与外套管体（11）之间的间隙，增加了推送管（21）的推动力，具有很高的实用价值。

Description

一种支架输送系统 技术领域
本发明涉及医疗器械领域，特别是涉及一种支架输送系统。
背景技术
目前商用或通用的食道支架释放推送器，一般由调节柄、固定柄、手柄、外管、内管、细管、支架腔、压缩支架及导引头等零部件组合。推送器外管和内管间有一定的间隙，以保证二者可作相对滑动，支架放置于外管与细管形成的腔中(称为支架腔)，通过内管和细管的相互移动，可调节支架腔的长度以适应不同长度的支架需要，将外管回抽时，其细和与外管之间的压缩支架逐渐释放张开。
例如申请号为CN200520070630.2的中国专利文件公开了一种覆膜支架输送器，该输送器主要由外套管和内芯构成，外套管外套于内芯外，内芯由导引头、轴芯管、输送杆连接组成，轴心管前端连接导引头，轴心管后端连接输送杆，轴芯管的导引头后部设置有支架放置段，支架放置段的长度大于食管支架管径，且略小于轴心管，轴芯管上放置支架，外套管将支架压在轴芯管上。当输送器进入管腔狭窄段定位后，缓慢退出外套管，支架被展开并脱离轴芯管，导引头后退至外套管并与之一同退出管腔。本实用新型可以方便地进入管腔，降低支架释放难度，提高支架输送的准确性，可帮助患者延长生存期，改善生活质量。
再例如申请号CN 201310010362.4的中国专利文件公开了一种食道支架输送器，包括外鞘管、芯管、推管、导向头、显影标识环、不透射标记环、前把手、后把手和安全锁套，其特征在于设有压紧套和张紧套，前把手中心的外鞘管穿孔和锁紧螺纹孔之间依次设有定位孔和复原孔，定位孔内壁后端部沿轴向圆周阵列设有卡紧槽，压紧套是由环形顶台、张紧大圆柱套体和定位小圆柱套体沿同一轴线固定连接而成，环形顶台的内孔外端设有锥形定位孔，所述张紧套是由圆柱形固定套体以及圆柱形固定套体前端的锥形台体构成，张紧套沿锥形台体一端沿轴向圆周阵列设有张紧通槽，压紧套和张紧套分别套在推管上，张紧套一端经固定套体与安全锁套相套接，另一端与压紧套相对应，压紧套套在外鞘管后端并将其固定在前把手上，具有结构新颖、操作快捷、判断准确、回抽阻力小、手术时间短、患者痛苦小等优点。
又例如申请号CN 201539751.2的中国专利文件公开了一种可控型食道支架释放推送器，包括食道支架释放推送器，所述食道支架释放推送器包括调节柄、固定柄、手柄、外管、内管、细管、导引头、支架腔、支架；外管设有刻度线；支架腔由内管远端、导引头近端和外管构成，支架腔内设有支架，支架腔近端设有细管，细管与导引头连通；细管设有孔，支架设有线圈，调节柄固定连接丝线，丝线穿过孔与线圈套接。本实用新型能可控的地、准确地的将食道支架释放到食道狭窄处，支架释放、回收自如，大大地提高食道支架释放成功率、精确度，并减少并发症的发生。
然而，以上支架输送器均需要将支架提前放置于支架腔中，一旦放入便不再轻易取出，无法即用即放，如此一来，若需要经过长距离的运输或者长时间的等待，支架便一直被放置在支架输送器中，长时间的放置会使得支架的膨胀扩张力受到影响，不易快速恢复自然张力，从而影响手术的效果。
发明内容
本发明公开了一种支架输送系统，包括：
外套管组件，包括外套管体、固定于外套管体后端的外套手柄和连接于外套管体前端的外套管尖端，外套手柄内设置有与外套管体的内径等径的轴向通孔，外套管尖端的外径自后向前呈台阶状减小；
内套管组件，包括内套于外套管体中的推送管、固定于推送管后端的内套手柄、连接于推送管前端的支架放置管和设置于支架放置管前端的内套管尖端，推送管外径与外套管体内径相适应来提供轴向推动力，推送管的外径大于支架放置管的外径，内套管尖端内设置有与支架放置管的内径等径的轴向通孔，其后端外径与外套管尖端的前端外径相嵌合，且其外径自后端至前端逐渐减小；
卡位环，固定于外套手柄和内套手柄之间的推送管外壁上。
优选地，外套管体包括前部的支架包覆管和后部的外套包覆管，支架包覆管的长度不小于内套管组件中的支架放置管的长度，用于套设于支架放置管外侧来包覆内置支架。
进一步地，支架包覆管的内径大于外套包覆管的内径。
优选地，外套手柄包括握持部和防滑部，握持部和防滑部可拆卸地连接为一体，其连接方式为螺接或者卡接或者握持部和防滑部一体成型。
进一步地，防滑部沿其外周设有多条凸起，凸起为直线型或曲线型，或者防滑部外周表面设有多个凸点。
优选地，外套手柄的前后两端呈半球状。
进一步地，内套管组件的支架放置管和推送管通过连接件相连接，连接件包括插接支架放置管的细径部、插接推送管的粗径部和位于这两者之间的推送台，推送台内设通孔，通孔的内径小于细径部和粗径部的内径。
优选地，内套手柄包括球体部和柄部，球体部后端呈半球状，柄部的外径自后向前逐渐减小。
进一步地，推送管和支架放置管具有器械通道和进水通道，外套管手柄和内套管手柄的推送管部分设有进水接头。
优选地，推送管前端外周设有显影环。
综上所述，本发明涉及的支架输送系统，在外套管体的前端设置有外套管尖端，外套管尖端的外径自后向前呈台阶状减小，方便与支架辅助导入装置的支架容纳管相配合，使用时将支架容纳管头端部分套设于外套管尖端的外径较细的前端，支架容纳管的头端前表面抵接于外套管尖端的台阶面上，对外套管尖端的外径较粗的管体部提供推力，使得外套管沿着轴向后退，露出的支架放置管顺势进入支架容纳管中，从而将支架自支架容纳管中转移到支架放置管上，无需提前长时间的将支架置于支架输送器上，可即用即放，使用起来十分方便；另外，本发明推送管的外径大于支架放置管的外径，能够减小推送管与外套管体之间的间隙，增加推送管的推动力，综上，本发明具有很高的实用价值。
为让本发明的上述内容能更明显易懂，下文特举优选实施例，并结合附图，作详细说明如下。
附图说明
下面将结合附图介绍本发明。
图1为本发明各实施例中公开的一种支架输送系统的整体结构示意图；
图2为本发明各实施例中公开的外套管先端的剖面图；
图3为本发明实施例二中公开的外套管体的整体结构示意图；
图4为本发明各实施例中公开的另一支架输送系统的整体结构示意图；
图5-1为本发明实施例三中公开的连接件的整体结构示意图；
图5-2为本发明实施例三中公开的连接件的剖面图。
具体实施方式
以下由特定的具体实施例说明本发明的实施方式，本领域技术人员可由本说明书所揭示的内容轻易地了解本发明的其他优点及功效。
现在参考附图介绍本发明的示例性实施方式，本发明可以用许多不同的形式来实施，并且不局限于此处描述的实施例，提供这些实施例是为了详尽且完全地公开本发明，并且向所属技术领域的技术人员充分传达本发明的范围。对于表示在附图中的示例性实施方式中的术语并不是对本发明的限定。在附图中，相同的单元/元件使用相同的附图标记。
除非另有说明，此处使用的术语(包括科技术语)对所属技术领域的技术人员具有通常的理解含义。另外，可以理解的是，以通常使用的词典限定的术语，应当被理解为与其相关领域的语境具有一致的含义，而不应该被理解为理想化的或过于正式的意义。
第一实施例
如图1所示，本发明第一实施例公开了一种支架输送系统100，包括外套管组件1，外套管组件1包括外套管体11、固定于外套管体后端的外套手柄12和连接于外套管体前端的外套管尖端13，外套手柄12内设置有与外套管体的内径等径的轴向通孔，外套管尖端13的外径自后向前呈台阶状减小；内套管组件2，包括内套于外套管体11中的推送管21、固定于推送管21后端的内套手柄22、连接于推送管21前端的支架放置管23和设置于支架放置管23前端的内套管尖端24(图1未标出)，推送管21外径与外套管体11内径相适应来提供轴向推动力，推送管21的外径大于支架放置管23的外径，内套管尖端24内设置有与支架放置管23的内径等径的轴向通孔，其后端外径与外套管尖端13的前端外径相嵌合，且其外径自后端至前端逐渐减小；卡位环3，固定于外套手柄12和内套手柄22之间的推送管外壁上。
本发明第一实施例中，外套管尖端13的外径自后向前呈台阶状减小，方便与支架辅助导入装置的支架容纳管相配合，如图2所示，使用时将支架容纳管头端部分套设于外套管尖端的外径较细的前端131，支架容纳管的头端前表面抵接于外套管尖端的台阶面130上，对外套管尖端的外径较粗的管体部132提供推力，使得外套管体11沿着轴向后退，露出的支架放置管23顺势进入支架容纳管中，已置于支架容纳管中的支架便能够自支架 容纳管中转移到支架放置管23上，从而无需提前长时间的将支架置于支架输送器上，可即用即放，使用起来十分方便。
具体地，外套管尖端13与外套管体11的连接方式为粘接或者螺接，或者通过过盈配合等方式进行卡合连接，不仅仅限于本实施例中所列举的方式。
在本优选实施例中，如图1所示，外套手柄12可以包括握持部和防滑部，握持部可设计为中部略微凹陷的弧形柱体，符合人手握持曲线，便于操作者握持手柄进行操作；防滑部可以是沿外套手柄12的外周所设的防滑结构，该防滑结构可以为多条直线型的凸起，或者为能增加摩擦系数的各种设计，如多条曲线型的凸起、多个凸点等。进一步地，本实施例的外套手柄12的握持部和防滑部可以是可拆卸地连接为一体，如通过螺接、卡接等方式连接为一体，也可以是整体一体成型的手柄，根据实际需要和加工成本等进行设计。
更进一步地，外套手柄12的前端和后端呈半球状，该设计使得外套手柄12各部分之间过渡曲线光滑平顺，便于握持的同时不会戳伤人手，避免对人手造成损伤，实用价值很高。
本优选实施例中，内套手柄22可以包括后端的球体部和连接在球体部前方的柄部，球体部的后端呈半球状，与上述外套手柄相似，该半球状的设计使得内套手柄22的各部分之间的过渡曲线光滑平顺，便于握持的同时不会戳伤人手，避免对人手造成损伤，实用价值很高。另外，柄部的外径自后向前逐渐减小，可增加内套手柄和推送管之间的应力强度，且外形美观。
优选地，推送管21和与其相通的支架放置管23内部设有轴向的器械通道和进水通道，相应地，如图4所示，在外套手柄12和内套手柄22之间的推送管21的外壁上设有与进水通道相连通的进水接头20，器械通道可供导引丝等插入至病患部位，进水接头可连接外部的水泵通过进水通道注水和抽水。本实施例的内套管组件2还可以设有更多个轴向通道，以供同时插入两个器械进行手术操作，或者可以设有相隔离的独立的进水通道和出水通道，以分别注水和抽水。
更为优选地，本实施例的推送管21的前端外周可设有显影环25，显影环25随着推送管21的推拉而发生位移，能够配合X光进行显影定位，从而帮助医护人员实时判断支架在人体腔道中的移动位置。
本实施例所公开的支架输送系统，外套管尖端13的设计有利于与支架辅助导入装置的支架容纳管相配合，无需提前长时间的将支架置于支架输送器上，可即用即放，使用起来十分方便。
第二实施例
如图1所示，本发明第二实施例公开了一种支架输送系统100，包括外套管组件1，外套管组件1包括外套管体11、固定于外套管体后端的外套手柄12和连接于外套管体前端的外套管尖端13，外套手柄12内设置有与外套管体的内径等径的轴向通孔，外套管尖端13的外径自后向前呈台阶状减小；内套管组件2，包括内套于外套管体11中的推送管21、固定于推送管21后端的内套手柄22、连接于推送管21前端的支架放置管23和设置于支架放置管23前端的内套管尖端24，推送管21外径与外套管体11内径相适应来提供轴向推动力，推送管21的外径大于支架放置管23的外径，内套管尖端24内设置有与支架放置管23的内径等径的轴向通孔，其后端外径与外套管尖端13的前端外径相嵌合，且其外径自后端至前端逐渐减小；卡位环3，固定于外套手柄12和内套手柄22之间的推送管外壁上。
本实施例是第一实施例的变形例，本优选实施例与第一实施例的不同之处在于，本实施例中，支架包覆管11a的内径大于外套包覆管11b的内径，如图3所示，该设计的有益效果在于：一方面，支架包覆管11a和支架放置管13之间形成的腔体空间充足，自膨式支架容纳时不必过度压缩而损伤其膨胀力；另一方面，外套包覆管11b和推送管21之间的间隙变小，有利于增加推送管21的推动力，使得管体的推拉更为便捷省力。
在本优选实施例中，如图1所示，外套手柄12可以包括握持部和防滑部，握持部可设计为中部略微凹陷的弧形柱体，符合人手握持曲线，便于操作者握持手柄进行操作；防滑部可以是沿外套手柄12的外周所设的防滑结构，该防滑结构可以为多条直线型的凸起，或者为能增加摩擦系数的各种设计，如多条曲线型的凸起、多个凸点等。进一步地，本实施例的外套手柄12的握持部12a和防滑部12b可以是可拆卸地连接为一体，如通过螺接、卡接等方式连接为一体，也可以是整体一体成型的手柄，根据实际需要和加工成本等进行设计。
更进一步地，外套手柄12的前端和后端呈半球状，该设计使得外套手柄12各部分之间过渡曲线光滑平顺，便于握持的同时不会戳伤人手，避免对人手造成损伤，实用价值很高。
本优选实施例中，内套手柄22可以包括球后端的体部和连接在球体部前方的柄部，球体部的后端呈半球状，与上述外套手柄相似，该半球状的设计使得内套手柄22的各部分之间的过渡曲线光滑平顺，便于握持的同时不会戳伤人手，避免对人手造成损伤，实用 价值很高。另外，柄部的外径自后向前逐渐减小，可增加内套手柄和推送管之间的应力强度，且外形美观。
优选地，推送管21和与其相通的支架放置管23内部设有轴向的器械通道和进水通道，相应地，如图4所示，在外套手柄12和内套手柄22之间的推送管21的外壁上设有与进水通道相连通的进水接头20，器械通道可供导引丝等插入至病患部位，进水接头可连接外部的水泵通过进水通道注水和抽水。本实施例的内套管组件2还可以设有更多个轴向通道，以供同时插入两个器械进行手术操作，或者可以设有相隔离的独立的进水通道和出水通道，以分别注水和抽水。
更为优选地，本实施例的推送管21的前端外周可设有显影环25，显影环25随着推送管21的推拉而发生位移，能够配合X光进行显影定位，从而帮助医护人员实时判断支架在人体腔道中的移动位置。
第三实施例
本发明第三实施例公开了一种支架输送系统100，如图1所示，包括外套管组件1，外套管组件1包括外套管体11、固定于外套管体后端的外套手柄12和连接于外套管体前端的外套管尖端13，外套手柄12内设置有与外套管体的内径等径的轴向通孔，外套管尖端13的外径自后向前呈台阶状减小；内套管组件2，包括内套于外套管体11中的推送管21、固定于推送管21后端的内套手柄22、连接于推送管21前端的支架放置管23和设置于支架放置管23前端的内套管尖端24，推送管21外径与外套管体11内径相适应来提供轴向推动力，推送管21的外径大于支架放置管23的外径，内套管尖端24内设置有与支架放置管23的内径等径的轴向通孔，其后端外径与外套管尖端13的前端外径相嵌合，且其外径自后端至前端逐渐减小；卡位环3，固定于外套手柄12和内套手柄22之间的推送管外壁上。
本实施与前述实施例的不同之处在于，如图1、图5-1和图5-2所示，本实施例中，内套管组件2的支架放置管23和推送管21是通过连接件26相连接的，连接件26包括插接支架放置管的细径部26a、插接推送管的粗径部26b和位于这两者之间的推送台26c，推送台26c内设通孔，通孔将细径部26a和粗径部26b进行连通，且通孔的内径小于细径部和粗径部的内径。使用时，支架放置管23嵌入细径部26a并抵接在推送台26c的前表面，推送管21嵌入粗径部26b并抵接在推送台26c的后表面，推送台26c的通孔将支架 放置管23和推送管21的管腔相连通，优选地，推送管21、推送台26c的通孔和支架放置管23这三者的内径相等，从而形成平滑过渡的内腔，可构成器械通道或进水通道。
在本优选实施例中，如图1所示，外套手柄12可以包括握持部和防滑部，握持部可设计为中部略微凹陷的弧形柱体，符合人手握持曲线，便于操作者握持手柄进行操作；防滑部可以是沿外套手柄12的外周所设的防滑结构，该防滑结构可以为多条直线型的凸起，或者为能增加摩擦系数的各种设计，如多条曲线型的凸起、多个凸点等。进一步地，本实施例的外套手柄12的握持部和防滑部可以是可拆卸地连接为一体，如通过螺接、卡接等方式连接为一体，也可以是整体一体成型的手柄，根据实际需要和加工成本等进行设计。
更进一步地，外套手柄12的前端和后端呈半球状，该设计使得外套手柄12各部分之间过渡曲线光滑平顺，便于握持的同时不会戳伤人手，避免对人手造成损伤，实用价值很高。
本优选实施例中，内套手柄22可以包括后端的球体部和连接在球体部前方的柄部，球体部的后端呈半球状，与上述外套手柄相似，该半球状的设计使得内套手柄22的各部分之间的过渡曲线光滑平顺，便于握持的同时不会戳伤人手，避免对人手造成损伤，实用价值很高。另外，柄部的外径自后向前逐渐减小，可增加内套手柄和推送管之间的应力强度，且外形美观。
优选地，推送管21和与其相通的支架放置管23内部设有轴向的器械通道和进水通道，相应地，如图4所示，在外套手柄12和内套手柄22之间的推送管21的外壁上设有与进水通道相连通的进水接头20，器械通道可供导引丝等插入至病患部位，进水接头可连接外部的水泵通过进水通道注水和抽水。本实施例的内套管组件2还可以设有更多个轴向通道，以供同时插入两个器械进行手术操作，或者可以设有相隔离的独立的进水通道和出水通道，以分别注水和抽水。
更为优选地，本实施例的推送管21的前端外周可设有显影环25，显影环25随着推送管21的推拉而发生位移，能够配合X光进行显影定位，从而帮助医护人员实时判断支架在人体腔道中的移动位置。
进一步地，连接件26的外周壁上设有凹环26d，显影环25可嵌入凹环26d中，使得显影环的位置固定，不会由于外套管体和内套推送管之间的反复推拉摩擦而脱落，减小了器械损坏的风险。
本实施例的连接件将外径较粗的推送管和外径较细的支架放置管连接在一起，不仅增加了连接的稳固性，且其内部所形成的内腔的内壁之间平滑过渡，相互之间无台阶起伏， 使得导引丝可顺利地沿着内腔推进而无阻隔，不会发生弯曲形变，增加了手术操作的便利性，减小了器械或人体损伤。
综上所述，本发明涉及的支架输送系统，在外套管体的前端设置有外套管尖端，外套管尖端的外径自后向前呈台阶状减小，方便与支架辅助导入装置的支架容纳管相配合，使用时将支架容纳管头端部分套设于外套管尖端的外径较细的前端，支架容纳管的头端前表面抵接于外套管尖端的台阶面上，对外套管尖端的外径较粗的管体部提供推力，使得外套管沿着轴向后退，露出的支架放置管顺势进入支架容纳管中，从而将支架自支架容纳管中转移到支架放置管上，无需提前长时间的将支架置于支架输送器上，可即用即放，使用起来十分方便；另外，本发明推送管的外径大于支架放置管的外径，能够减小推送管与外套管体之间的间隙，增加推送管的推动力，具有很高的实用价值。
此外，本发明上述实施例仅例示性说明本发明的原理及其功效，而非用于限制本发明。任何本领域技术人员皆可在不违背本发明的精神及范畴下，对上述实施例进行修饰或改变。因此，本领域技术人员在未脱离本发明所揭示的精神与技术思想下所完成的一切等效修饰或改变，仍应由本发明的权利要求所涵盖。

Claims (10)

  1. 一种支架输送系统，其特征在于，包括：
    外套管组件，包括外套管体、固定于所述外套管体后端的外套手柄和连接于所述外套管体前端的外套管尖端，所述外套手柄内设置有与所述外套管体的内径等径的轴向通孔，所述外套管尖端的外径自后向前呈台阶状减小；
    内套管组件，包括内套于所述外套管体中的推送管、固定于所述推送管后端的内套手柄、连接于所述推送管前端的支架放置管和设置于所述支架放置管前端的内套管尖端，所述推送管外径与所述外套管体内径相适应来提供轴向推动力，所述推送管的外径大于支架放置管的外径，所述内套管尖端内设置有与所述支架放置管的内径等径的轴向通孔，其后端外径与所述外套管的前端外径相嵌合，且其外径自后端至前端逐渐减小；
    卡位环，固定于所述外套手柄和内套手柄之间的所述推送管外壁上。
  2. 如权利要求1所述的支架输送系统，其特征在于，所述外套管体包括前部的支架包覆管和后部的外套包覆管，所述支架包覆管的长度不小于所述内套管组件中的支架放置管的长度，用于套设于所述支架放置管外侧来包覆内置支架。
  3. 如权利要求2所述的支架输送系统，其特征在于，所述支架包覆管的内径大于所述外套包覆管的内径。
  4. 如权利要求1所述的支架输送系统，其特征在于，所述外套手柄包括握持部和防滑部，所述握持部和所述防滑部可拆卸地连接为一体，其连接方式为螺接或者卡接或者所述握持部和所述防滑部一体成型。
  5. 如权利要求4所述的支架输送系统，其特征在于，所述防滑部沿其外周设有多条凸起，所述凸起为直线型或曲线型，或者所述防滑部外周表面设有多个凸点。
  6. 如权利要求1所述的支架输送系统，其特征在于，所述外套手柄的前后两端呈半球状。
  7. 如权利要求1所述的支架输送系统，其特征在于，所述内套管组件的支架放置管和所述推送管通过连接件相连接，所述连接件包括插接所述支架放置管的细径部、插接所述推送管的粗径部和位于这两者之间的推送台，所述推送台内设通孔，所述通孔的内径小于所述细径部和所述粗径部的内径。
  8. 如权利要求1所述的支架输送系统，其特征在于，所述内套手柄包括球体部和柄部，所述球体部后端呈半球状，所述柄部的外径自后向前逐渐减小。
  9. 如权利要求1-8中任一所述的支架输送系统，其特征在于，所述推送管和所述支架放置管具有器械通道和进水通道，所述外套管手柄和所述内套管手柄的所述推送管部分设有进水接头。
  10. 如权利要求1-8中任一所述的支架输送系统，其特征在于，所述推送管前端外周设有显影环。
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