CN108992221B - Support conveying system - Google Patents
Support conveying system Download PDFInfo
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- CN108992221B CN108992221B CN201811047144.7A CN201811047144A CN108992221B CN 108992221 B CN108992221 B CN 108992221B CN 201811047144 A CN201811047144 A CN 201811047144A CN 108992221 B CN108992221 B CN 108992221B
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- stent
- tube
- outer sleeve
- diameter
- handle
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- 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
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- 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
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The invention discloses a stent conveying system, which comprises an outer sleeve component, an inner sleeve component and a clamping ring, wherein the outer sleeve component comprises an outer sleeve body and an outer sleeve tip connected to the front end of the outer sleeve body, the outer diameter of the outer sleeve tip is reduced in a step shape from back to front, the inner sleeve component comprises a pushing pipe sleeved in the outer sleeve body, a stent placing pipe connected to the front end of the pushing pipe and an inner sleeve tip arranged at the front end of the stent placing pipe, and the outer diameter of the pushing pipe is larger than the outer diameter of the stent placing pipe; according to the invention, the outer sleeve tip is arranged at the front end of the outer sleeve body, the outer diameter of the outer sleeve tip is reduced in a step shape from back to front, and is matched with the support accommodating tube of the support auxiliary leading-in device, so that the support can be quickly and conveniently transferred from the support accommodating tube to the support placing tube, can be placed immediately after use, and is very convenient to use; in addition, the invention reduces the clearance between the push pipe and the outer sleeve body, increases the driving force of the push pipe and has high practical value.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a stent conveying system.
Background
At present, commercial or universal esophagus stent release pusher is generally combined by parts such as an adjusting handle, a fixing handle, a handle, an outer tube, an inner tube, a thin tube, a stent cavity, a compression stent, a guide head and the like. A certain gap is reserved between the outer tube and the inner tube of the pusher so as to ensure that the outer tube and the inner tube can slide relatively, the support is placed in a cavity formed by the outer tube and the thin tube (called a support cavity), the length of the support cavity can be adjusted to meet the requirements of supports with different lengths by mutual movement of the inner tube and the thin tube, and when the outer tube is drawn back, the thin tube and the compressed support between the outer tube are gradually released and opened.
For example, chinese patent document No. CN200520070630.2 discloses a tectorial membrane stent conveyor, which mainly comprises an outer sleeve and an inner core, wherein the outer sleeve is sleeved outside the inner core, the inner core is formed by connecting a guide head, a shaft core tube and a conveying rod, the front end of the shaft core tube is connected with the guide head, the rear end of the shaft core tube is connected with the conveying rod, a stent placing section is arranged at the rear part of the guide head of the shaft core tube, the length of the stent placing section is greater than the diameter of an esophageal stent and slightly smaller than the shaft core tube, a stent is placed on the shaft core tube, and the outer sleeve presses the stent on the shaft core tube. When the conveyor enters the narrow section of the tube cavity for positioning, the conveyor slowly exits the outer sleeve, the stent is unfolded and separated from the shaft core tube, and the guide head retreats to the outer sleeve and exits the tube cavity together with the outer sleeve. The invention can conveniently enter the lumen, reduce the difficulty of releasing the stent, improve the accuracy of stent delivery, help the patient to prolong the life cycle and improve the quality of life.
For example, chinese patent application No. CN 201310010362.4 discloses an esophageal stent delivery device, which comprises an outer sheath tube, a core tube, a push tube, a guide head, a developing marker ring, an opaque marker ring, a front handle, a rear handle and a safety lock sleeve, and is characterized in that a compression sleeve and a tension sleeve are provided, a positioning hole and a restoration hole are sequentially provided between a perforation of the outer sheath tube at the center of the front handle and a locking threaded hole, a clamping groove is provided along an axial circumferential array at the rear end of the inner wall of the positioning hole, the compression sleeve is formed by fixedly connecting an annular top platform, a large tensioning cylinder sleeve body and a small positioning cylinder sleeve body along the same axis, a tapered positioning hole is provided at the outer end of the inner hole of the annular top platform, the tension sleeve is formed by a cylindrical fixed sleeve body and a tapered platform body at the front end of the cylindrical fixed sleeve body, a tension through groove is provided along the axial circumferential array at one end of the tapered platform, one end of the tensioning sleeve is sleeved with the safety lock sleeve through the fixed sleeve body, the other end of the tensioning sleeve corresponds to the pressing sleeve, the pressing sleeve is sleeved at the rear end of the outer sheath tube and is fixed on the front handle, and the tensioning sleeve has the advantages of novel structure, quickness in operation, accuracy in judgment, small withdrawal resistance, short operation time, small pain of a patient and the like.
Also for example, chinese patent application No. CN 201539751.2 discloses a controllable esophageal stent release pusher, which comprises an esophageal stent release pusher, wherein the esophageal stent release pusher comprises an adjusting handle, a fixing handle, a handle, an outer tube, an inner tube, a thin tube, a guide head, a stent cavity, and a stent; the outer tube is provided with scale marks; the bracket cavity consists of an inner tube far end, a seeker near end and an outer tube, a bracket is arranged in the bracket cavity, a thin tube is arranged at the bracket cavity near end, and the thin tube is communicated with the seeker; the tubule is equipped with the hole, and the support is equipped with the coil, and regulation handle fixed connection silk thread, silk thread pass the hole and cup joint with the coil. The invention can controllably and accurately release the esophageal stent to the narrow part of the esophagus, and the stent can be released and recovered freely, thereby greatly improving the success rate and the accuracy of the release of the esophageal stent and reducing the occurrence of complications.
However, the above stent conveyors all need to place the stent in the stent cavity in advance, and once the stent is placed in the stent conveyor, the stent cannot be taken out and placed immediately, so that the stent is always placed in the stent conveyor if long-distance transportation or long-time waiting is needed, and the expansion and expansion force of the stent is affected by long-time placement, so that the natural tension is not easily and quickly recovered, and the effect of the operation is affected.
Disclosure of Invention
The invention discloses a stent delivery system, comprising:
the outer sleeve component comprises 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, wherein an axial through hole with the same diameter as the inner diameter of the outer sleeve body is formed in the outer sleeve handle, and the outer diameter of the outer sleeve tip is reduced in a step shape from back to front;
the inner sleeve assembly comprises a pushing pipe sleeved in the outer sleeve body, an inner sleeve handle fixed at the rear end of the pushing pipe, a support placing pipe connected to the front end of the pushing pipe and an inner sleeve tip arranged at the front end of the support placing pipe, the outer diameter of the pushing pipe is matched with the inner diameter of the outer sleeve body to provide axial pushing force, the outer diameter of the pushing pipe is larger than the outer diameter of the support placing pipe, an axial through hole with the same diameter as the inner diameter of the support placing pipe is arranged in the inner sleeve tip, the outer diameter of the rear end of the inner sleeve is embedded with the outer diameter of the front end of the outer sleeve tip, and the outer diameter of the inner;
and the clamping ring is fixed on the outer wall of the pushing pipe between the outer sleeve handle and the inner sleeve handle.
Preferably, the outer sleeve body comprises a front bracket coating pipe and a rear outer sleeve coating pipe, the length of the bracket coating pipe is not less than that of the bracket placing pipe in the inner sleeve assembly, and the bracket coating pipe is sleeved outside the bracket placing pipe to coat the built-in bracket.
Further, the inner diameter of the bracket cladding pipe is larger than that of the outer sleeve cladding pipe.
Preferably, the coat handle comprises a holding part and an anti-slip part, the holding part and the anti-slip part are detachably connected into a whole, and the connection mode is in a threaded connection or a clamping connection or the integrated forming of the holding part and the anti-slip part.
Further, the antiskid part is provided with a plurality of bulges along the periphery, and the bulges are linear or curved, or the periphery surface of the antiskid part is provided with a plurality of convex points.
Preferably, the front and rear ends of the outer handle are hemispherical.
Further, the support placing pipe of the inner sleeve pipe assembly is connected with the pushing pipe through a connecting piece, the connecting piece comprises a small-diameter portion, a large-diameter portion and a pushing platform, the small-diameter portion is inserted into the support placing pipe, the large-diameter portion is inserted into the pushing pipe, the pushing platform is located between the small-diameter portion and the large-diameter portion, a through hole is formed in the pushing platform, and the inner diameter of the through hole is smaller than the inner diameters of the small.
Preferably, the inner sleeve handle comprises a sphere part and a handle part, the rear end of the sphere part is hemispherical, and the outer diameter of the handle part is gradually reduced from back to front.
Furthermore, the pushing tube and the bracket placing tube are provided with an instrument channel and a water inlet channel, and the pushing tube parts of the outer sleeve tube handle and the inner sleeve tube handle are provided with water inlet joints.
Preferably, the periphery of the front end of the pushing pipe is provided with a developing ring.
In summary, the stent delivery system according to the present invention is characterized in that the front end of the outer casing body is provided with an outer casing tip, the outer diameter of the outer casing tip decreases from back to front in a step shape, so as to be convenient for matching with a stent accommodating tube of the stent auxiliary lead-in device, when in use, the end portion of the stent accommodating tube head is sleeved at the front end of the outer casing tip with a thinner outer diameter, the front surface of the head end of the stent accommodating tube abuts against the step surface of the outer casing tip, and provides a thrust to the tube body with a thicker outer diameter of the outer casing tip, so that the outer casing tube retreats along the axial direction, and the exposed stent accommodating tube enters the stent accommodating tube along the trend, so that the stent is transferred from the stent accommodating tube to the stent accommodating tube, and the stent does not need to be placed on; in addition, the outer diameter of the pushing pipe is larger than that of the support placing pipe, so that the gap between the pushing pipe and the outer sleeve body can be reduced, the pushing force of the pushing pipe is increased, and the pushing pipe has high practical value.
In order to make the aforementioned and other objects of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
The invention will now be described with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the overall construction of a stent delivery system as disclosed in various embodiments of the present invention;
FIG. 2 is a cross-sectional view of the distal end of the outer cannula disclosed in various embodiments of the present invention;
fig. 3 is a schematic overall structure view of the outer casing body according to the second embodiment of the present invention;
FIG. 4 is a schematic overall view of another stent delivery system disclosed in various embodiments of the present invention;
fig. 5-1 is an overall structural view of a connecting member disclosed in the third embodiment of the present invention;
fig. 5-2 is a cross-sectional view of a connector disclosed in the third embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
The present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein but are to be construed as broadly and completely disclosing the present invention and providing those skilled in the art with a full range of functionality. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
First embodiment
As shown in fig. 1, a first embodiment of the present invention discloses a stent delivery system 100, which comprises an outer cannula assembly 1, wherein the outer cannula assembly 1 comprises an outer cannula body 11, an outer cannula handle 12 fixed at the rear end of the outer cannula body, and an outer cannula tip 13 connected to the front end of the outer cannula body, an axial through hole having the same diameter as the inner diameter of the outer cannula body is arranged in the outer cannula handle 12, and the outer diameter of the outer cannula tip 13 is reduced in a step shape from back to front; the inner sleeve component 2 comprises a pushing pipe 21 which is sleeved in the outer sleeve body 11, an inner sleeve handle 22 fixed at the rear end of the pushing pipe 21, a support placing pipe 23 connected to the front end of the pushing pipe 21 and an inner sleeve tip 24 (not marked in figure 1) arranged at the front end of the support placing pipe 23, wherein the outer diameter of the pushing pipe 21 is matched with the inner diameter of the outer sleeve body 11 to provide axial pushing force, the outer diameter of the pushing pipe 21 is larger than that of the support placing pipe 23, an axial through hole with the same diameter as the inner diameter of the support placing pipe 23 is arranged in the inner sleeve tip 24, the outer diameter of the rear end of the inner sleeve component is embedded with the outer diameter of the front end of the outer sleeve tip 13, and the outer; and the clamping ring 3 is fixed on the outer wall of the push pipe between the outer sleeve handle 12 and the inner sleeve handle 22.
In the first embodiment of the present invention, the outer diameter of the tip 13 of the outer sheath is reduced from back to front in a step shape, which is convenient to match with the stent accommodating tube of the stent auxiliary guiding device, as shown in fig. 2, when in use, the tip of the stent accommodating tube is partially sleeved on the front end 131 with a thinner outer diameter of the tip of the outer sheath, the front surface of the head end of the stent accommodating tube abuts on the step surface 130 of the tip of the outer sheath, and provides a pushing force to the tube body 132 with a thicker outer diameter of the tip of the outer sheath, so that the outer sheath 11 is retracted along the axial direction, the exposed stent accommodating tube 23 enters the stent accommodating tube, and the stent placed in the stent accommodating tube can be transferred from the stent accommodating tube to the stent accommodating tube 23, so that the stent does not need to be placed on the stent conveyor for a long time in.
Specifically, the connection between the outer cannula tip 13 and the outer cannula body 11 is by means of bonding, screwing, or by means of snap-fit connection by means of interference fit, and is not limited to the embodiments illustrated in the present application.
In the preferred embodiment, as shown in fig. 1, the sheath handle 12 may include a gripping portion and an anti-slip portion, the gripping portion may be designed as an arc-shaped cylinder with a slightly concave middle portion, which conforms to a hand gripping curve and is convenient for an operator to grip the handle for operation; the anti-slip portion may be an anti-slip structure disposed along the outer periphery of the outer handle 12, and the anti-slip structure may be a plurality of linear protrusions, or various designs capable of increasing the friction coefficient, such as a plurality of curved protrusions, a plurality of convex points, and the like. Further, the grip portion and the anti-slip portion of the sheath handle 12 of the present embodiment may be detachably connected as a whole, for example, connected as a whole by screwing, clamping, etc., or may be integrally formed as a handle, and designed according to actual needs and processing costs, etc.
Furthermore, the front end and the rear end of the outer sleeve handle 12 are hemispherical, and the design ensures that the transition curve between each part of the outer sleeve handle 12 is smooth and smooth, so that the hand can not be stabbed when the outer sleeve handle is held conveniently, the damage to the hand is avoided, and the practical value is very high.
In the preferred embodiment, the inner handle 22 may include a spherical portion at the rear end and a handle connected to the front of the spherical portion, the rear end of the spherical portion is hemispherical, and similar to the outer handle, the hemispherical design makes the transition curve between each portion of the inner handle 22 smooth and smooth, so that the hand is not stabbed when the inner handle is held, the hand is prevented from being damaged, and the practical value is high. In addition, the outer diameter of the handle part is gradually reduced from back to front, so that the stress intensity between the handle of the inner sleeve and the push pipe can be increased, and the appearance is attractive.
Preferably, the pushing tube 21 and the stent placing tube 23 connected to the pushing tube are provided with an axial instrument channel and a water inlet channel inside, and correspondingly, as shown in fig. 4, a water inlet joint 20 connected to the water inlet channel is provided on the outer wall of the pushing tube 21 between the outer sheath handle 12 and the inner sheath handle 22, the instrument channel can be used for inserting a guide wire and the like into a diseased part, and the water inlet joint can be connected to an external water pump to inject water and pump water through the water inlet channel. The inner cannula assembly 2 of this embodiment may also be provided with more axial passages for simultaneous insertion of two instruments for surgical operation, or may be provided with separate and independent inlet and outlet passages for separate water injection and pumping.
More preferably, the periphery of the front end of the pushing tube 21 of the present embodiment may be provided with a developing ring 25, and the developing ring 25 displaces along with the pushing and pulling of the pushing tube 21, and can perform developing positioning in cooperation with X-ray, so as to help medical staff to determine the moving position of the stent in the body lumen in real time.
In the stent delivery system disclosed by the embodiment, the design of the tip 13 of the outer sleeve is favorable for being matched with the stent accommodating tube of the stent auxiliary leading-in device, the stent does not need to be placed on the stent conveyor for a long time in advance, and can be placed immediately, so that the use is very convenient.
Second embodiment
As shown in fig. 1, a second embodiment of the present invention discloses a stent delivery system 100, which comprises an outer cannula assembly 1, wherein the outer cannula assembly 1 comprises an outer cannula body 11, an outer cannula handle 12 fixed at the rear end of the outer cannula body, and an outer cannula tip 13 connected to the front end of the outer cannula body, an axial through hole having the same diameter as the inner diameter of the outer cannula body is arranged in the outer cannula handle 12, and the outer diameter of the outer cannula tip 13 is reduced in a step shape from back to front; the inner sleeve component 2 comprises a pushing pipe 21 which is sleeved in the outer sleeve body 11, an inner sleeve handle 22 fixed at the rear end of the pushing pipe 21, a support placing pipe 23 connected to the front end of the pushing pipe 21 and an inner sleeve tip 24 arranged at the front end of the support placing pipe 23, wherein the outer diameter of the pushing pipe 21 is matched with the inner diameter of the outer sleeve body 11 to provide axial pushing force, the outer diameter of the pushing pipe 21 is larger than the outer diameter of the support placing pipe 23, an axial through hole with the same diameter as the inner diameter of the support placing pipe 23 is arranged in the inner sleeve tip 24, the outer diameter of the rear end of the inner sleeve component is embedded with the outer diameter of the front end of the outer sleeve tip 13, and the; and the clamping ring 3 is fixed on the outer wall of the push pipe between the outer sleeve handle 12 and the inner sleeve handle 22.
This embodiment is a modification of the first embodiment, and differs from the first embodiment in that the inside diameter of the bracket coating tube 11a is larger than the inside diameter of the outer jacket coating tube 11b in this embodiment, and as shown in fig. 3, this design has the beneficial effects of: on one hand, the cavity space formed between the stent coating tube 11a and the stent placing tube 13 is sufficient, and the self-expanding stent is accommodated without being excessively compressed to damage the expansion force; on the other hand, the clearance between outer cover cladding pipe 11b and propelling movement pipe 21 diminishes, is favorable to increasing the driving force of propelling movement pipe 21 for the push-and-pull of body is more convenient laborsaving.
In the preferred embodiment, as shown in fig. 1, the sheath handle 12 may include a gripping portion and an anti-slip portion, the gripping portion may be designed as an arc-shaped cylinder with a slightly concave middle portion, which conforms to a hand gripping curve and is convenient for an operator to grip the handle for operation; the anti-slip portion may be an anti-slip structure disposed along the outer periphery of the outer handle 12, and the anti-slip structure may be a plurality of linear protrusions, or various designs capable of increasing the friction coefficient, such as a plurality of curved protrusions, a plurality of convex points, and the like. Further, the grip portion 12a and the anti-slip portion 12b of the sheath handle 12 of the present embodiment may be detachably connected to each other, for example, by screwing, clipping, etc., or may be integrally formed, and designed according to actual needs and processing costs.
Furthermore, the front end and the rear end of the outer sleeve handle 12 are hemispherical, and the design ensures that the transition curve between each part of the outer sleeve handle 12 is smooth and smooth, so that the hand can not be stabbed when the outer sleeve handle is held conveniently, the damage to the hand is avoided, and the practical value is very high.
In the preferred embodiment, the inner handle 22 may include a body portion at the rear end of the ball and a handle portion connected to the front end of the ball, the rear end of the ball is hemispherical, similar to the outer handle, the hemispherical design makes the transition curve between each portion of the inner handle 22 smooth and smooth, the hand is not stabbed when the inner handle is held, the hand is not damaged, and the practical value is high. In addition, the outer diameter of the handle part is gradually reduced from back to front, so that the stress intensity between the handle of the inner sleeve and the push pipe can be increased, and the appearance is attractive.
Preferably, the pushing tube 21 and the stent placing tube 23 connected to the pushing tube are provided with an axial instrument channel and a water inlet channel inside, and correspondingly, as shown in fig. 4, a water inlet joint 20 connected to the water inlet channel is provided on the outer wall of the pushing tube 21 between the outer sheath handle 12 and the inner sheath handle 22, the instrument channel can be used for inserting a guide wire and the like into a diseased part, and the water inlet joint can be connected to an external water pump to inject water and pump water through the water inlet channel. The inner cannula assembly 2 of this embodiment may also be provided with more axial passages for simultaneous insertion of two instruments for surgical operation, or may be provided with separate and independent inlet and outlet passages for separate water injection and pumping.
More preferably, the periphery of the front end of the pushing tube 21 of the present embodiment may be provided with a developing ring 25, and the developing ring 25 displaces along with the pushing and pulling of the pushing tube 21, and can perform developing positioning in cooperation with X-ray, so as to help medical staff to determine the moving position of the stent in the body lumen in real time.
Third embodiment
The third embodiment of the invention discloses a stent conveying system 100, as shown in fig. 1, which comprises an outer sleeve component 1, wherein the outer sleeve component 1 comprises an outer sleeve body 11, an outer sleeve handle 12 fixed at the rear end of the outer sleeve body and an outer sleeve tip 13 connected to the front end of the outer sleeve body, an axial through hole with the same diameter as the inner diameter of the outer sleeve body is arranged in the outer sleeve handle 12, and the outer diameter of the outer sleeve tip 13 is reduced in a step shape from back to front; the inner sleeve component 2 comprises a pushing pipe 21 which is sleeved in the outer sleeve body 11, an inner sleeve handle 22 fixed at the rear end of the pushing pipe 21, a support placing pipe 23 connected to the front end of the pushing pipe 21 and an inner sleeve tip 24 arranged at the front end of the support placing pipe 23, wherein the outer diameter of the pushing pipe 21 is matched with the inner diameter of the outer sleeve body 11 to provide axial pushing force, the outer diameter of the pushing pipe 21 is larger than the outer diameter of the support placing pipe 23, an axial through hole with the same diameter as the inner diameter of the support placing pipe 23 is arranged in the inner sleeve tip 24, the outer diameter of the rear end of the inner sleeve component is embedded with the outer diameter of the front end of the outer sleeve tip 13, and the; and the clamping ring 3 is fixed on the outer wall of the push pipe between the outer sleeve handle 12 and the inner sleeve handle 22.
The present embodiment is different from the previous embodiments in that, as shown in fig. 1, 5-1 and 5-2, in the present embodiment, the support placing tube 23 and the pushing tube 21 of the inner tube assembly 2 are connected by a connector 26, the connector 26 includes a small diameter portion 26a for inserting the support placing tube, a large diameter portion 26b for inserting the pushing tube and a pushing platform 26c located therebetween, a through hole is provided in the pushing platform 26c, the through hole connects the small diameter portion 26a and the large diameter portion 26b, and the inner diameter of the through hole is smaller than the inner diameters of the small diameter portion and the large diameter portion. When in use, the stent placing tube 23 is embedded in the small diameter part 26a and abuts against the front surface of the pushing platform 26c, the pushing tube 21 is embedded in the large diameter part 26b and abuts against the rear surface of the pushing platform 26c, the through hole of the pushing platform 26c communicates the stent placing tube 23 with the lumen of the pushing tube 21, preferably, the through holes of the pushing tube 21, the pushing platform 26c and the stent placing tube 23 have the same inner diameter, so that a smooth transition inner cavity is formed, and an instrument channel or a water inlet channel can be formed.
In the preferred embodiment, as shown in fig. 1, the sheath handle 12 may include a gripping portion and an anti-slip portion, the gripping portion may be designed as an arc-shaped cylinder with a slightly concave middle portion, which conforms to a hand gripping curve and is convenient for an operator to grip the handle for operation; the anti-slip portion may be an anti-slip structure disposed along the outer periphery of the outer handle 12, and the anti-slip structure may be a plurality of linear protrusions, or various designs capable of increasing the friction coefficient, such as a plurality of curved protrusions, a plurality of convex points, and the like. Further, the grip portion and the anti-slip portion of the sheath handle 12 of the present embodiment may be detachably connected as a whole, for example, connected as a whole by screwing, clamping, etc., or may be integrally formed as a handle, and designed according to actual needs and processing costs, etc.
Furthermore, the front end and the rear end of the outer sleeve handle 12 are hemispherical, and the design ensures that the transition curve between each part of the outer sleeve handle 12 is smooth and smooth, so that the hand can not be stabbed when the outer sleeve handle is held conveniently, the damage to the hand is avoided, and the practical value is very high.
In the preferred embodiment, the inner handle 22 may include a spherical portion at the rear end and a handle connected to the front of the spherical portion, the rear end of the spherical portion is hemispherical, and similar to the outer handle, the hemispherical design makes the transition curve between each portion of the inner handle 22 smooth and smooth, so that the hand is not stabbed when the inner handle is held, the hand is prevented from being damaged, and the practical value is high. In addition, the outer diameter of the handle part is gradually reduced from back to front, so that the stress intensity between the handle of the inner sleeve and the push pipe can be increased, and the appearance is attractive.
Preferably, the pushing tube 21 and the stent placing tube 23 connected to the pushing tube are provided with an axial instrument channel and a water inlet channel inside, and correspondingly, as shown in fig. 4, a water inlet joint 20 connected to the water inlet channel is provided on the outer wall of the pushing tube 21 between the outer sheath handle 12 and the inner sheath handle 22, the instrument channel can be used for inserting a guide wire and the like into a diseased part, and the water inlet joint can be connected to an external water pump to inject water and pump water through the water inlet channel. The inner cannula assembly 2 of this embodiment may also be provided with more axial passages for simultaneous insertion of two instruments for surgical operation, or may be provided with separate and independent inlet and outlet passages for separate water injection and pumping.
More preferably, the periphery of the front end of the pushing tube 21 of the present embodiment may be provided with a developing ring 25, and the developing ring 25 displaces along with the pushing and pulling of the pushing tube 21, and can perform developing positioning in cooperation with X-ray, so as to help medical staff to determine the moving position of the stent in the body lumen in real time.
Further, the outer peripheral wall of the connecting piece 26 is provided with a concave ring 26d, and the developing ring 25 can be embedded into the concave ring 26d, so that the position of the developing ring is fixed, the developing ring cannot fall off due to repeated push-pull friction between the outer sleeve body and the inner sleeve pushing tube, and the risk of damage to the instrument is reduced.
The connecting piece of this embodiment places the union coupling with the pushing tube that the external diameter is thicker and the support that the external diameter is thinner together, has not only increased the steadiness of connecting, and smooth transition between the inner wall of its inside inner chamber that forms, and no step fluctuation each other for the guide wire can be smoothly impeld along the inner chamber and do not have the separation, can not take place crooked deformation, has increased the convenience of operation, has reduced apparatus or human damage.
In summary, the stent delivery system according to the present invention is characterized in that the front end of the outer casing body is provided with an outer casing tip, the outer diameter of the outer casing tip decreases from back to front in a step shape, so as to be convenient for matching with a stent accommodating tube of the stent auxiliary lead-in device, when in use, the end portion of the stent accommodating tube head is sleeved at the front end of the outer casing tip with a thinner outer diameter, the front surface of the head end of the stent accommodating tube abuts against the step surface of the outer casing tip, and provides a thrust to the tube body with a thicker outer diameter of the outer casing tip, so that the outer casing tube retreats along the axial direction, and the exposed stent accommodating tube enters the stent accommodating tube along the trend, so that the stent is transferred from the stent accommodating tube to the stent accommodating tube, and the stent does not need to be placed on; in addition, the outer diameter of the pushing pipe is larger than that of the support placing pipe, so that the clearance between the pushing pipe and the outer sleeve body can be reduced, the pushing force of the pushing pipe is increased, and the pushing pipe has high practical value.
Furthermore, the above-described embodiments of the present invention are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes be made by those skilled in the art without departing from the spirit and technical spirit of the present invention, and be covered by the claims of the present invention.
Claims (10)
1. A stent delivery system, comprising:
the outer sleeve component comprises 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, wherein an axial through hole with the same diameter as the inner diameter of the outer sleeve body is formed in the outer sleeve handle, and the outer diameter of the outer sleeve tip is reduced in a step shape from back to front;
the inner sleeve assembly comprises a pushing pipe sleeved in the outer sleeve body, an inner sleeve handle fixed at the rear end of the pushing pipe, a support placing pipe connected to the front end of the pushing pipe and an inner sleeve tip arranged at the front end of the support placing pipe, the outer diameter of the pushing pipe is matched with the inner diameter of the outer sleeve to provide axial pushing force, the outer diameter of the pushing pipe is larger than that of the support placing pipe, an axial through hole with the same diameter as the inner diameter of the support placing pipe is arranged in the inner sleeve tip, the outer diameter of the rear end of the inner sleeve is embedded with the outer diameter of the front end of the outer sleeve, and the outer diameter of the inner sleeve is gradually reduced from the rear end to the front end;
and the clamping ring is fixed on the outer wall of the pushing pipe between the outer sleeve handle and the inner sleeve handle.
2. The stent delivery system of claim 1, wherein the outer sheath body comprises a forward stent sheath tube and a rearward sheath tube, the stent sheath tube having a length no less than a length of the stent placement tube in the inner sheath assembly for sheathing an inner stent by fitting over an outer side of the stent placement tube.
3. The stent delivery system of claim 2, wherein the stent cladding tube has an inner diameter greater than an inner diameter of the outer jacket cladding tube.
4. The stent delivery system of claim 1, wherein the sheath handle comprises a gripping portion and a non-slip portion, and the gripping portion and the non-slip portion are detachably connected into a whole in a screwing or clamping manner or are integrally formed.
5. The stent delivery system according to claim 4, wherein the non-slip portion is provided along an outer circumference thereof with a plurality of protrusions, the protrusions being linear or curved, or an outer circumferential surface of the non-slip portion is provided with a plurality of protrusions.
6. The stent delivery system of claim 1, wherein the sheath handle is hemispherical at the front and rear ends.
7. The stent delivery system according to claim 1, wherein the stent placement tube of the inner cannula assembly and the pusher tube are connected by a connector, the connector comprising a small diameter portion for receiving the stent placement tube, a large diameter portion for receiving the pusher tube, and a pusher table therebetween, the pusher table having a through hole therein, the through hole having an inner diameter smaller than the inner diameters of the small diameter portion and the large diameter portion.
8. The stent delivery system of claim 1, wherein the inner sheath handle comprises a spherical portion and a shank portion, the spherical portion having a hemispherical rear end, the shank portion having an outer diameter that decreases from the rear to the front.
9. The stent delivery system of any one of claims 1-8, wherein the pusher tube and the stent deployment tube have an instrument channel and a water inlet channel, and the pusher tube portions of the outer cannula handle and the inner cannula handle are provided with water inlet fittings.
10. The stent delivery system of any one of claims 1-8, wherein the pusher tube has a developer ring disposed about the circumference of the front end thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811047144.7A CN108992221B (en) | 2018-09-09 | 2018-09-09 | Support conveying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811047144.7A CN108992221B (en) | 2018-09-09 | 2018-09-09 | Support conveying system |
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| CN108992221A CN108992221A (en) | 2018-12-14 |
| CN108992221B true CN108992221B (en) | 2019-12-20 |
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| CN201811047144.7A Active CN108992221B (en) | 2018-09-09 | 2018-09-09 | Support conveying system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211934438U (en) * | 2019-12-27 | 2020-11-17 | 先健科技(深圳)有限公司 | Conveyor and lumen instrument conveying system |
| CN111449814A (en) * | 2020-05-15 | 2020-07-28 | 常州贺利氏微创医疗器械有限公司 | Auxiliary placement device for stent and using method thereof |
| CN118217067A (en) * | 2022-12-21 | 2024-06-21 | 神途医疗科技(上海)有限公司 | Braided stent and stent system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006124549A1 (en) * | 2005-05-12 | 2006-11-23 | Ev3, Inc. | Implant delivery system with interlocked rx port orientation |
| CN102028570A (en) * | 2009-09-30 | 2011-04-27 | 吴雄 | Non-vessel stent conveyor capable of developing under surveillance of X rays |
| CN102038565B (en) * | 2010-12-17 | 2013-08-14 | 北京有色金属研究总院 | Great vascular stent delivery system |
| CN204709092U (en) * | 2015-04-23 | 2015-10-21 | 有研亿金新材料有限公司 | Aortic stents induction system |
| CN206612865U (en) * | 2016-12-01 | 2017-11-07 | 有研医疗器械（北京）有限公司 | It is a kind of to stablize recyclable esophageal stents induction system |
| CN209019073U (en) * | 2018-09-09 | 2019-06-25 | 上海医立泰生物科技有限公司 | A kind of stent delivery system |
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| CN108992221A (en) | 2018-12-14 |
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