CN104068918B - Catheter with atherosclerotic plaque cutting and sucking function - Google Patents
Catheter with atherosclerotic plaque cutting and sucking function Download PDFInfo
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- CN104068918B CN104068918B CN201410334459.5A CN201410334459A CN104068918B CN 104068918 B CN104068918 B CN 104068918B CN 201410334459 A CN201410334459 A CN 201410334459A CN 104068918 B CN104068918 B CN 104068918B
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- seal wire
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- conduit
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00831—Material properties
- A61B2017/00942—Material properties hydrophilic
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22079—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with suction of debris
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B2017/320052—Guides for cutting instruments
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
- A61B2017/320741—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions for stripping the intima or the internal plaque from a blood vessel, e.g. for endarterectomy
Abstract
The invention discloses a catheter with an atherosclerotic plaque cutting and sucking function. Guide wires or an inflatable balloon system or a support system can penetrate through stenosis and bending positions in occlusion conveniently. According to the catheter, the near end of a catheter body is connected with a connector, the far end of the catheter body is connected with a guide cutting device, and a guide block is arranged at the far end of the guide cutting device. The guide block is connected with the far end of the control guide wire and the far end of the cutting guide wire, the near end of the cutting guide wire is connected with the far end of the catheter body, and the near end of the control guide wire is connected with an adjusting knob used for adjusting and controlling the guide wires to make axial movement. The adjusting knob is connected to the near end of the connector. Compared with the prior art, the adjusting knob at the near end of the connector can be adjusted, thrombi at a diseased region can be cut off, a suction instrument at the Luer end can be operated, the cut thrombi can be sucked out, the guide wires or the inflatable balloon system or the support system can penetrate through the stenosis and bending positions in occlusion more conveniently.
Description
Technical field
The present invention relates to a kind of medical apparatus and instruments, particularly a kind of conduit for coronary artery disease Surgery.
Background technology
Coronary atherosclerotic heart disease refers to coronary artery generation atherosclerotic lesion and causes lumen of vessels stenosis or occlusion, causes myocardial ischemia, anoxia or downright bad and heart disease that is that cause, is referred to as " coronary heart disease ".For the operative treatment of this disease, mainly based on percutaneous coronary intervention (pci) PCI.In the enforcement of percutaneous coronary intervention (pci) operation, Normal practice uses to guide seal wire from the vascular site on the subcutaneous heart pushing to generation blockage pathology via arteries, and then make guide seal wire through whole blockage pathology, again by guiding seal wire as transmission path, corresponding dilating sacculus system or mounting system etc. are sent to Occlusion position, finally carry out sacculus pressurising blood vessel dilating or strut support, in diseased region, place rebuilds out new tunnel, thus reach and make cardiac muscle regain blood supply, the object of normal work again.But in this operation process, the case that diseased region place congestion situations is comparatively serious can be run into, as obstruction place severe stenosis or complications, even entirely shut CTO etc., causes dilating sacculus system or mounting system, even guides the situation that seal wire all cannot pass through.Under these circumstances; operation implementer can adopt other modes as anchoring techniques usually; reverse by technology etc.; help to guide seal wire, dilating sacculus system or mounting system to send to Occlusion position; complete operative treatment, or also may occur because apparatus cannot be long and cause situation about stopping of performing the operation by, operating time.In such cases, all also exist and use that operating theater instruments is more, may cause the problems such as complication risk is higher, operating time is longer occur in more loaded down with trivial details, the art of operation.
Summary of the invention
The object of this invention is to provide a kind of conduit with cutting atherosclerotic plaque and pumping function, the technical problem that solve makes guide seal wire, dilating sacculus system or mounting system can pass narrow in Occlusion, bending position more easily.
The present invention is by the following technical solutions: a kind of conduit with cutting atherosclerotic plaque and pumping function, be provided with the catheter main body of tubulose, catheter body proximal ends is connected with adapter, described catheter main body far-end is connected with guiding cutter sweep, the far-end of guiding cutter sweep is provided with guiding block, the far-end of guiding block connection control seal wire and 2 ~ 6 cutting seal wires, the near-end of cutting seal wire is connected with catheter main body far-end, the near-end controlling seal wire is connected with the adjusting knob that regulable control seal wire moves axially, and adjusting knob is connected to the near-end of adapter.
The cross section external dimensions of guiding block of the present invention is 0.45 ~ 0.70mm, and cross sectional shape is circular, oval, trapezoidal or square.
The cross section external dimensions of cutting seal wire of the present invention is 0.10 ~ 0.20mm, and length is 8 ~ 20mm, and cross sectional shape is circular, oval, trapezoidal or square, adopts Nitinol or stainless steel silk, and in free state, cutting seal wire linearly.
Far-end pipe shaft is connected with between catheter main body of the present invention and guiding cutter sweep, distal tube is as conical pipe, and the external diameter of near-end is consistent with the external diameter of catheter main body, and far-end is small end, small end end is angular cut, and the face that angular cut cut channel is formed is plane, curved surface or cambered surface; Described far-end pipe shaft is bonded by materials at two layers, and skin is outer tube, adopts the macromolecule polymer material being applicable to intervention apparatus, and internal layer is the outer ripply Nitinol of pipe or stainless steel tube, and the pitch of waves is changed to 0.5mm to small end by 2mm along large end.
Distal tube body length of the present invention is 300mm, and distal outer diameter is 0.79 ~ 1.00mm, and outer tube thickness is 0.03 ~ 0.10mm.
Catheter main body external diameter of the present invention is 1.0 ~ 1.4mm, and be separated into small one and large one two inner chambers in catheter main body vertically, less inner chamber is guidewire lumen, and internal diameter is 0.26 ~ 0.36mm.
Described far-end pipe shaft or far-end pipe shaft and catheter main body surface-coated have hydrophilic coating, hydrophilic coating is end table double-decker, primer is polyesters macromolecular material, polyethers macromolecule or polyesters macromolecule and the high molecular block thing of polyethers, and skin-material adopts macromolecular material or natural polymer and derivant thereof; Described polyesters macromolecular material is polyurethane or Merlon, described polyethers macromolecular material is polyether polyol or EU, described macromolecular material is more than one of polyvinyl pyrrolidone, polyethylene glycol oxide, polypropylene oxide and poly N-vinyl lactams, and described natural polymer and derivant thereof are chitin, chitosan or agarose; Described skin depth is 0.005-0.035mm, and underlayer thickness is 0.005-0.035mm; Described hydrophilic coating region is that the distal end of far-end pipe shaft (4) starts proximally to extend, and length is 50-500mm.
Described adapter is y type luer connector, y type luer connector is provided with supervisor, supervisor middle part is connected with arm and forms y type structure, angle between arm and supervisor's near-end one section is acute angle, arm is Rule end, and the far-end of supervisor is coaxially connected with catheter main body, and the near-end of supervisor is threaded ends, the outer peripheral edge of threaded ends is external screw thread, internal chamber wall has two symmetrical, proximally initial gathering sills distally extended vertically.
The blocking cap that described adjusting knob is connected with knob cap near-end by the slide block of the column arranged in knob cap, knob cap forms; Described knob cap distal portions is screw, formed with the external screw thread of threaded ends and be threaded, knob cap proximal part is the through hole be communicated with screw, is provided with the snap ring that a circle protrudes in through hole, the proximal part outer peripheral edge of knob cap is external screw thread, is formed be threaded with the female thread of blocking cap; Described slide block has eccentric through-hole vertically, in the outer rim of slide block, in axial direction be provided with two symmetrically arranged, outwardly guide rails, the interior formation of gathering sill embedding threaded ends inner chamber is slidably connected, on the close end excircle of slide block, have the annular groove of annular, the snap ring of knob cap embeds wherein to be formed and is slidably connected.
Described control guidewire proximal is connected with the far-end of slide block.
The present invention compared with prior art, distal end of catheter is connected with guiding cutter sweep, regulate the adjusting knob at adapter near-end, the thrombosis of diseased region can be cut down, the suction apparatus of operation Rule end, the thrombosis sucking-off that just can will cut down, is not using under more operating theater instruments, more shirtsleeve operation, make guide seal wire, dilating sacculus system or mounting system more easily through narrow in Occlusion, bending position, percutaneous coronary intervention (pci) operation can be completed smoothly.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is the structural representation of embodiment of the present invention y type luer connector.
Fig. 3 is the structural representation of embodiment of the present invention adjusting knob.
Fig. 4 is the A enlarged drawing of Fig. 3.
Fig. 5 is the sectional view that embodiment of the present invention y type luer connector and adjusting knob coordinate.
Fig. 6 is the sectional view of embodiment of the present invention catheter main body.
Fig. 7 is the structural representation of embodiment of the present invention far-end pipe shaft.
Fig. 8 is the partial sectional view of embodiment of the present invention catheter main body and the docking of far-end pipe shaft.
Fig. 9 is the structural representation of embodiment of the present invention guiding cutter sweep.
Figure 10 is the photo of embodiment of the present invention guiding cutter sweep in free state.
Figure 11 is the photo that embodiment of the present invention guiding cutter sweep cutting seal wire opens.
Figure 12 is embodiment of the present invention guiding cutter sweep cutting photo.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Figure 1, the conduit (conduit) of band cutting atherosclerotic plaque of the present invention and pumping function, length is 1000 ~ 1500mm.Conduit is provided with y type luer connector 1, y type luer connector 1 and is provided with a supervisor, and supervisor middle part is connected with an arm and forms y type structure, and the angle between arm and supervisor's near-end one section is acute angle.The far-end of y type luer connector 1 supervisor is coaxially connected with catheter main body 3, and the far-end of catheter main body 3 is connected with far-end pipe shaft 4, and the far-end of far-end pipe shaft 4 is connected with guiding cutter sweep 5.Outside the far-end and catheter main body 3 junction of y type luer connector 1 supervisor, be equipped with conduit reinforcement 6, be connected with adjusting knob 2 at the near-end of y type luer connector 1 supervisor.
As shown in Figure 2, the far-end of y type luer connector 1 supervisor is conduit assembling end 7, and the near-end of supervisor is threaded ends 8, and arm is Rule end 9, the inner chamber intercommunication of conduit assembling end 7, threaded ends 8 and Rule end 9.Y type luer connector 1 adopts rigid material.The endoporus that the near-end of catheter main body 3 puts in conduit assembling end 7 is formed and connects, and it is consistent that external diameter and the conduit of catheter main body 3 near-end assemble end 7 internal diameter.The outer peripheral edge of conduit assembling end 7 is provided with annular protrusion, for conduit reinforcement 6 be nested be assemblied in catheter main body 3 assemble end 7 junction with conduit time, snap in the ring-shaped depression draw-in groove of conduit reinforcement 6 inwall.The outer peripheral edge of threaded ends 8 is processed with external screw thread, and pitch is 0.5 ~ 2mm, and long threaded portion is 12 ~ 18mm, is formed be threaded with the female thread of adjusting knob 2.The internal chamber wall of threaded ends 8 has two symmetrical, proximally initial straight gathering sills distally extended vertically, gathering sill length is 12 ~ 18mm.This gathering sill is used for matching with the slide block 11 of adjusting knob 2.Rule end 9 is 6% luer lock joint of standard, meets the female Luer of GBT 1962.2-2001 standard and ISO 594-2 1998 standard, can be used for connecting other apparatuses.
As shown in Figure 3, the blocking cap 19 that adjusting knob 2 is connected with knob cap 10 near-end by the slide block 11 of the column arranged in knob cap 10, knob cap 10 forms, and knob cap 10, slide block 11 and blocking cap 19 are coaxially arranged.Knob cap 10 distal portions is screw, and its female thread pitch is 0.5 ~ 2mm, and long threaded portion is 12 ~ 18mm, is formed be threaded with the external screw thread of y type luer connector 1 threaded ends 8.When knob cap 10 opposite thread link 8 rotates, its distance moved axially is 4 ~ 6mm, the control seal wire 18 being connected to slide block 11 far-end can be regulated in catheter main body 3 to move axially 4 ~ 6mm through slide block 11.Knob cap 10 proximal part is the through hole be communicated with screw, is provided with the snap ring that a circle is projecting inward to the center of circle in through hole, embeds in the annular groove of slide block 11 outer peripheral edge when loading in knob cap 10 for slide block 11.The proximal part outer peripheral edge of knob cap 10 is external screw thread, and pitch is 0.5 ~ 2mm, and long threaded portion is 5mm, is formed be threaded with the female thread of blocking cap 19.Knob cap 10 adopts the macromolecule polymer material being applicable to coronary artery disease intervention apparatus.Slide block 11 has the eccentric through-hole of internal diameter 1.5 ~ 2.0mm vertically, and eccentric through-hole is communicated with the suction chamber 13 of the double lumen tube of catheter main body 3, so that other seal wires pass through.In the outer rim of slide block 11, be in axial direction provided with two symmetrically arranged, outwardly guide rails, formed in the gathering sill embedding threaded ends 8 inner chamber during for being connected with y type luer connector 1 and be slidably connected.As shown in Figure 4, have the annular groove of annular on the close end excircle of slide block 11, when loading in knob cap 10 for slide block 11, the snap ring of knob cap 10 embeds wherein, and snap ring and annular groove are formed and be slidably connected, and mutually can freely rotate.The distal end of slide block 11 is connected with the near-end controlling seal wire 18.Slide block 11 adopts the macromolecule polymer material being applicable to coronary artery disease intervention apparatus.Blocking cap 19 is hat shape, and near-end is closed, and distal portions is screw, and the pitch of screw female thread is consistent with the external screw thread of knob cap 10, is 0.5 ~ 2mm, and long threaded portion is 4mm, adopts the macromolecule polymer material being applicable to coronary artery disease intervention apparatus.The external diameter controlling seal wire 18 is 0.20 ~ 0.30mm, adopts nitinol alloy wire.
As shown in Figure 5, after the female thread of the knob cap 10 of adjusting knob 2 is threaded with the external screw thread of y type luer connector 1 threaded ends 8, adjusting knob 2 is coaxial with the supervisor of y type luer connector 1, the knob cap 10 of rotation of adjustment knob 2, can make knob cap 10 move along its axis direction relative to the supervisor of y type luer connector 1 is forward and backward.Guide rail due to slide block 11 embeds in the gathering sill of external screw thread link 8 inner chamber, slide block 11 can not rotate with knob cap 10, the snap ring of knob cap 10 is embedded in the annular groove of slide block 11 simultaneously, therefore slide block 11 is only with knob cap 10 forward and backward movement vertically, slide block 11 is forward and backward movement vertically, drives the forward and backward movement of control seal wire 18 be connected with its far-end.
As shown in Figure 6, catheter main body 3 is double lumen, and the external diameter of catheter main body 3 is 1.0 ~ 1.4mm (3 ~ 4Fr).Be separated into small one and large one two inner chambers in catheter main body 3 vertically, less inner chamber is guidewire lumen 12, and control seal wire 18 thus inner chamber passes, and the internal diameter of guidewire lumen 12 is 0.26 ~ 0.36mm; Larger inner chamber is suction chamber 13, for aspirating the thrombosis that comes off, through guiding seal wire.Catheter main body 3 adopts the macromolecule polymer material being applicable to coronary artery disease intervention apparatus, by prior art precision extrusion molding process, and an extrusion molding.Prior art precision extrusion molding process extrudes multi-lumen tube, and plastic grain enters the circular passage of tube core mouth intermode through extruder, is aided with compressed air and pressurizes to corresponding channel interior, become multi-lumen tube finally by die extrusion.
As shown in Figure 7, far-end pipe shaft 4 profile is conical pipe, and length is 300mm, and near-end is large end, and the external diameter of near-end is consistent with the external diameter of catheter main body 3, and is connected with catheter main body 3.Far-end is small end, and distal outer diameter is 0.79 ~ 1.00mm.Small end end is angular cut, and the face that angular cut is formed and far-end pipe shaft 4 axis out of plumb, the face that angular cut cut channel is formed is plane, curved surface or cambered surface.When far-end pipe shaft 4 is admitted to far-end, angular cut play the guiding role.Far-end pipe shaft 4 is bonded by materials at two layers, and skin is outer tube 14, and outer tube 14 adopts the macromolecule polymer material being applicable to coronary artery disease intervention apparatus, and thickness is 0.03 ~ 0.10mm.Internal layer is pipe ripply metal tube 15 in addition, adopt Nitinol or stainless steel tube, outer ripple is cut into along metal tube outer peripheral edge with laser, the pitch of waves is changed to 0.5mm to small end by 2mm along large end, can be even variation, can be also changed in stages, makes metal tube 15 proximally arrive far-end by firmly to soft gradual change, near-end has certain intensity, and far-end has good compliance.
As shown in Figure 8, catheter main body 3 is connected in the mode of docking with overlap joint with far-end pipe shaft 4.The metal tube 15 of far-end pipe shaft 4 near-end docks with catheter main body 3 far-end, outer tube 14 from metal tube 15 greatly end stretch out 10mm, entangle catheter main body 3, after bonding or welding, form the syndeton of docking and overlap joint.
Far-end pipe shaft 4 or far-end pipe shaft 4 have hydrophilic coating with catheter main body 3 surface-coated, and this hydrophilic coating is end table double-decker, and primer is polyesters macromolecular material, polyethers macromolecule or polyesters macromolecule and the high molecular block thing of polyethers.Polyesters macromolecular material is polyurethane or Merlon.Polyethers macromolecular material is polyether polyol or EU.Skin-material adopts macromolecular material or natural polymer and derivant thereof.Macromolecular material is more than one of polyvinyl pyrrolidone, polyethylene glycol oxide, polypropylene oxide and poly N-vinyl lactams, and natural polymer and derivant thereof are chitin, chitosan or agarose.Top layer lubricate, thickness is 0.005-0.035mm, and bottom plays fixing top layer, and thickness is 0.005-0.035mm.Hydrophilic coating region is that the distal end of far-end pipe shaft 4 starts proximally to extend, and length is 50-500mm.
As shown in Figure 9, guiding cutter sweep 5, by guiding block 17, control seal wire 18 and 2 ~ 6 cutting seal wires 20 form, and cutting seal wire 20 the best is 2.Guiding block 17 is positioned at far-end, there is the effect guiding whole conduit to enter artery stenosis blood vessel, guiding block 17 is 0.45 ~ 0.70mm with the cross section largest outer dimension of the axes normal of conduit, cross sectional shape is circular, oval, trapezoidal or square, outer surface is round and smooth without corner angle, adopt nylon tube, Nitinol or rustless steel, available laser cutting or grinding process processing and fabricating.Control seal wire 18 through far-end pipe shaft 4, the guidewire lumen 12 of catheter main body 3 and the supervisor of y type luer connector 1, near-end with on adjusting knob 2 the far-end of slide block 11 is connected, far-end is connected to the center of guiding block 17 near-end, and connected mode is for boning or welding.Cutting seal wire 20, the largest outer dimension in cross section is 0.10 ~ 0.20mm, and length is 8 ~ 20mm, and cross sectional shape is circular, oval, trapezoidal or square, adopts Nitinol or stainless steel silk.Cutting seal wire 20 is symmetricly set on and controls outside seal wire 18, and far-end is connected with the near-end of guiding block 17, and near-end is connected to the inside pipe wall of the small end end of far-end pipe shaft 4, and connected mode is bonding or welding.
In free state, cutting seal wire 20 is linearly.When guiding block 17 proximally moves, Distance Shortened between cutting seal wire 20 two ends is controlled in 7.5 ~ 7.8mm, cutting seal wire 20 is outwardly curved, arc outermost end is 0.8 ~ 1.3mm with controlling seal wire 18 towards the distance of outer surface cut seal wire 20, makes cutting seal wire 20 form the radian cut preferably.When cutting seal wire 20 is 2, because the external diameter controlling seal wire 18 is 0.20 ~ 0.30mm, two symmetrically arranged cutting seal wires 20 outwardly after external diameter be 1.8 ~ 2.9mm (0.8 × 2+0.2=1.8,1.3 × 2+0.3=2.9), form symmetrical cutting edge.When guiding block 17 distally moves, cutting seal wire 20 is tightened up linearly.When distally pushing conduit, cutting seal wire 20 linearly; During cutting, cutting seal wire 20 is curved.
If the far-end one section of catheter main body 3 is made into single chamber, middle part and near-end are double lumen, and catheter main body 3 proximally arrives far-end by firmly to soft gradual change, also without far-end pipe shaft 4, directly guiding cutter sweep 5 can be connected to the far-end of catheter main body 3.
During operation, when conduit is pushed to diseased region inaccessible in coronary artery, continue to push guiding block 17 through diseased region, after the control seal wire 18 of guiding cutter sweep 5 and two cutting seal wires 20 are directed to target (diseased region) position by guiding block 17, operative doctor is rotated counterclockwise the adjustment knob 2 on y type luer connector 1, the slide block 11 of its inside is proximally moved, slide block 11 pulls control seal wire 18 proximally to move, the guiding block 17 on the guiding cutter sweep 5 of far-end is driven proximally to move, two of being arranged on outside control seal wire 18 are cut, and seal wire 20 is curved outwards to be opened, form two cutting edges opened.At near-end rotary guide pipe, two cutting seal wires 20 also follow rotation, the thrombosis on target location can be cut down.Then, blocked by the through hole on adjustment knob 2 with blocking cap 19, the suction apparatus being connected to Rule end 9 of y type luer connector 1 by operation, as the syringe of 30ml, makes to produce vacuum in conduit, just can by the thrombosis that cuts down via suction chamber 13 sucking-off.By this operate in Ink vessel transfusing target lesion position carry out once or repeatedly after, a passage can be re-established at this diseased region of Ink vessel transfusing, be conducive to guide seal wire, expandable stent system is pushed to diseased region by pressurising dilating sacculus.
In the present embodiment, the catheter length of band cutting atherosclerotic plaque and pumping function is 1500mm, control seal wire 18 axial maximum moving distance 6mm in catheter main body 3, the guiding block 17 of guiding cutter sweep 5 is 0.70mm with the cross section external dimensions of the axes normal of conduit, cross sectional shape is circular, adopt nylon tube, controlling seal wire 18 external diameter is 0.30mm, adopts Nitinol.Two cutting seal wires 20, cross section external dimensions is 0.13mm, and length is 20mm, and cross sectional shape is circular, adopts 304 rustless steels (0Cr18Ni9).As shown in Figure 10, in free state, cutting seal wire 20 is linearly.As shown in figure 11, seal wire 20 is curved outwards opens for the cutting of adjustment knob 2, two, forms two cutting edges opened.As shown in figure 12, guiding cutter sweep 5 is carried out simulating cut experiment on HUOLONG sarcocarp, sarcocarp obviously sees cutting vestige, illustrate that guiding cutter sweep 5 can effectively cut, syringe will in conduit, suction, can by the sarcocarp that cuts down via suction chamber 13 sucking-off for after vacuum state.The conduit cutting atherosclerotic plaque and pumping function by above-mentioned description of test band of the present invention may be used for cutting and the suction of human body atherosclerotic plaque.
Conduit of the present invention is used in the treatment operation of comparatively serious obstruction place, severe stenosis, complications or CTO symptom of entirely shutting, there is following advantage: 1, under prior art conditions, when in the face of case as above, with needs adopt anchoring techniques or seal wire reverse by compared with technology, conduit of the present invention can reduce use apparatus, simplifies the instrumentation in operation process.2, owing to decreasing use apparatus, simplify instrumentation, operating time can be made greatly to shorten, also avoid complication odds, shorten the time that patient exposes under ray.3, diseased region cannot may be passed through because of apparatus compared to prior art, and cause performing the operation situation about stopping, conduit of the present invention sets up new tunnel at blockage pathology place, ensure that the apparatuses such as seal wire, dilating sacculus system or mounting system can more easily pass the advantage of diseased region, significantly can improve the success rate of operation.It is easier that conduit of the present invention is that the intervene operation of coronary artery severe stenosis or total occlusion provides an operation, uses equipment less, and effectively can reduce the insertion type apparatus of operation risk.
Conduit of the present invention, the atherosclerotic plaque of diseased region can effectively be excised by the guiding cutter sweep of far-end, builds the passage being beneficial to other apparatuses and passing through in pathological changes stenosis.Distal tube body contour is taper, and far-end is angular cut, is more conducive to conduit and enters, arrives some and occur the blood vessel that the size of disease states is less.Catheter main body is double cavity structure, and a chamber is the guidewire lumen controlling guiding cutter sweep, and another chamber is carry out coming off pathological changes speckle suction or transmit the suction chamber of other apparatuses, when double cavity structure ensures that apparatus operates in art, is not mutually interfered.Distal tube body structure is double layer material, and the outer macromolecule polymer material for soft applicable coronary artery disease intervention apparatus, makes far-end pipe shaft have good compliance, ensures that blood vessel does not damage by it; Internal layer is pipe in addition ripply metal tube, ensures that far-end pipe shaft has good intensity, good turns round control property and propelling movement property.The hydrophilic coating of far-end pipe shaft surface-coated, effectively can strengthen the handling capacity of conduit section far away, more easily makes conduit arrive diseased region, also effectively reduces the injury to blood vessel simultaneously.
It is easier that the present invention is that the intervene operation of coronary artery severe stenosis or total occlusion provides an operation, uses equipment less, and effectively can reduce the intervention apparatus of operation risk.
Claims (8)
1. the conduit with cutting atherosclerotic plaque and pumping function, be provided with the catheter main body (3) of tubulose, catheter main body (3) near-end is connected with adapter, it is characterized in that: described catheter main body (3) far-end is connected with guiding cutter sweep (5), the far-end of guiding cutter sweep (5) is provided with guiding block (17), the far-end of guiding block (17) connection control seal wire (18) and 2 ~ 6 cuttings seal wire (20), the near-end of cutting seal wire (20) is connected with catheter main body (3) far-end, the near-end controlling seal wire (18) is connected with the adjusting knob (2) that regulable control seal wire (18) moves axially, adjusting knob (2) is connected to the near-end of adapter,
The blocking cap (19) that described adjusting knob (2) is connected with knob cap (10) near-end by the slide block (11) of the column arranged in knob cap (10), knob cap (10) forms; Described knob cap (10) distal portions is screw, formed with the external screw thread of threaded ends (8) and be threaded, knob cap (10) proximal part is the through hole be communicated with screw, the snap ring that a circle protrudes is provided with in through hole, the proximal part outer peripheral edge of knob cap (10) is external screw thread, is formed be threaded with the female thread of blocking cap (19); Described slide block (11) has eccentric through-hole vertically, in the outer rim of slide block (11), in axial direction be provided with two symmetrically arranged, outwardly guide rails, the interior formation of gathering sill embedding threaded ends (8) inner chamber is slidably connected, on the close end excircle of slide block (11), have the annular groove of annular, the snap ring of knob cap (10) embeds wherein to be formed and is slidably connected;
Described adapter is y type luer connector (1), y type luer connector (1) is provided with supervisor, supervisor middle part is connected with arm and forms y type structure, angle between arm and supervisor's near-end one section is acute angle, arm is Rule end (9), the far-end of supervisor is coaxially connected with catheter main body (3), the near-end of supervisor is threaded ends (8), the outer peripheral edge of threaded ends (8) is external screw thread, internal chamber wall has two symmetrical, proximally initial gathering sills distally extended vertically.
2. the conduit of band cutting atherosclerotic plaque according to claim 1 and pumping function, it is characterized in that: the cross section external dimensions of described guiding block (17) is 0.45 ~ 0.70mm, cross sectional shape is circular, oval, trapezoidal or square.
3. the conduit of band cutting atherosclerotic plaque according to claim 1 and pumping function, it is characterized in that: the cross section external dimensions of described cutting seal wire (20) is 0.10 ~ 0.20mm, length is 8 ~ 20mm, cross sectional shape is circular, oval, trapezoidal or square, adopt Nitinol or stainless steel silk, in free state, cutting seal wire (20) linearly.
4. the conduit of band cutting atherosclerotic plaque according to claim 1 and pumping function, it is characterized in that: between described catheter main body (3) and guiding cutter sweep (5), be connected with far-end pipe shaft (4), far-end pipe shaft (4) is conical pipe, the external diameter of near-end is consistent with the external diameter of catheter main body (3), far-end is small end, small end end is angular cut, and the face that angular cut cut channel is formed is plane, curved surface or cambered surface; Described far-end pipe shaft (4) is bonded by materials at two layers, skin is outer tube (14), adopt the macromolecule polymer material being applicable to intervention apparatus, internal layer is the outer ripply Nitinol of pipe or stainless steel tube (15), and the pitch of waves is changed to 0.5mm to small end by 2mm along large end.
5. the conduit of band cutting atherosclerotic plaque according to claim 4 and pumping function, it is characterized in that: described far-end pipe shaft (4) length is 300mm, distal outer diameter is 0.79 ~ 1.00mm, and outer tube (14) thickness is 0.03 ~ 0.10mm.
6. the conduit of band cutting atherosclerotic plaque according to claim 5 and pumping function, it is characterized in that: described catheter main body (3) external diameter is 1.0 ~ 1.4mm, small one and large one two inner chambers are separated into vertically in catheter main body (3), less inner chamber is guidewire lumen (12), and internal diameter is 0.26 ~ 0.36mm.
7. the conduit of band cutting atherosclerotic plaque according to claim 6 and pumping function, it is characterized in that: described far-end pipe shaft (4) or far-end pipe shaft (4) have hydrophilic coating with catheter main body (3) surface-coated, hydrophilic coating is end table double-decker, primer is polyesters macromolecular material, polyethers macromolecule or polyesters macromolecule and the high molecular block thing of polyethers, and skin-material adopts macromolecular material or natural polymer and derivant thereof; Described polyesters macromolecular material is polyurethane or Merlon, described polyethers macromolecular material is polyether polyol or EU, described macromolecular material is more than one of polyvinyl pyrrolidone, polyethylene glycol oxide, polypropylene oxide and poly N-vinyl lactams, and described natural polymer and derivant thereof are chitin, chitosan or agarose; Described skin depth is 0.005-0.035mm, and underlayer thickness is 0.005-0.035mm; Described hydrophilic coating region is that the distal end of far-end pipe shaft (4) starts proximally to extend, and length is 50-500mm.
8. the conduit of band cutting atherosclerotic plaque according to claim 1 and pumping function, is characterized in that: described control seal wire (18) near-end is connected with the far-end of slide block (11).
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| DE102015114044A1 (en) * | 2015-08-25 | 2017-03-02 | Acandis Gmbh & Co. Kg | Medical aspiration system |
| US10531890B2 (en) * | 2016-12-30 | 2020-01-14 | C.R. Bard, Inc. | Scoring balloon with translating scoring wires |
| CN106955138B (en) * | 2017-03-09 | 2023-07-07 | 徐白生 | Multifunctional zebra guide wire |
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| US5318576A (en) * | 1992-12-16 | 1994-06-07 | Plassche Jr Walter M | Endovascular surgery systems |
| US5556408A (en) * | 1995-04-27 | 1996-09-17 | Interventional Technologies Inc. | Expandable and compressible atherectomy cutter |
| CN102056556A (en) * | 2008-06-05 | 2011-05-11 | 心血管系统公司 | Abrasive nose cone with expandable cutting and sanding region for rotational atherectomy device |
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| US20080172066A9 (en) * | 2005-07-29 | 2008-07-17 | Galdonik Jason A | Embolectomy procedures with a device comprising a polymer and devices with polymer matrices and supports |
| CN103930156B (en) * | 2011-09-13 | 2017-06-23 | 约翰·P·皮戈特 | Catheter in blood vessel with inflatable cut portion |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5318576A (en) * | 1992-12-16 | 1994-06-07 | Plassche Jr Walter M | Endovascular surgery systems |
| US5556408A (en) * | 1995-04-27 | 1996-09-17 | Interventional Technologies Inc. | Expandable and compressible atherectomy cutter |
| CN102056556A (en) * | 2008-06-05 | 2011-05-11 | 心血管系统公司 | Abrasive nose cone with expandable cutting and sanding region for rotational atherectomy device |
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