CN209220388U - A kind of embolism spring ring conveying device - Google Patents
A kind of embolism spring ring conveying device Download PDFInfo
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- CN209220388U CN209220388U CN201821516633.8U CN201821516633U CN209220388U CN 209220388 U CN209220388 U CN 209220388U CN 201821516633 U CN201821516633 U CN 201821516633U CN 209220388 U CN209220388 U CN 209220388U
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- China
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- push rod
- spring ring
- embolism
- conveying device
- embolism spring
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Abstract
A kind of embolism spring ring conveying device, it includes importing sheath (1) and push rod (2), the distal end insertion of push rod (2) imports in sheath (1), its distal end is connected with embolism spring ring (3), it is characterized in that being equipped with baffle ring (8) on described push rod (2) distal end, baffle ring (8) is equipped with clear opening (10) close to the side of push rod, the proximal end of embolism spring ring (3) is connected with release ball (11), the release ball is located in the clear opening (10) and realizes the positioning in baffle ring (8) by escape wire (9), the proximal end of escape wire (9), which passes through push rod (2) and is fixed on push rod, to be located in importing sheath outside；The push rod is close, and distal portion, baffle ring (8), release ball (11) and escape wire (9) constitute embolism spring ring relieving mechanism (4).The utility model has securely and reliably, and positioning accuracy is high, frees the features such as convenient and efficient.
Description
Technical field
The utility model relates to a kind of medical instrument, especially a kind of hemangioma cure instrument is specifically a kind of
In the predetermined position of people's body vessel placement embolism spring ring with the embolism spring ring conveying device for freeing structure.
Background technique
For many years, the flexible sheath that imports is used for always the various medical instruments of intravascular placement in human body.Such medical treatment
Instrument includes expanded spheres, developer solution, liquid medicine and various types of locking devices such as ball and embolism spring ring.Such as beauty
State's patent 5,108,407 and United States Patent (USP) 5,122,136, these patents, which disclose this device based on importing sheath, to be used to
It places embolism spring ring and treats aneurysm to the predetermined position of human vas, or in specific position sealing blood vessels.
Embolism spring ring, which is placed on the mode in blood vessel, can be spiral way, and random coil mode or spring ring are again
The of this sort spring ring mode such as secondary winding spring circle.Such as United States Patent (USP) 5,334,210 and United States Patent (USP) 5,382,259
Disclose different spring ring configurations.Embolism spring ring is usually by radip-opaque, and the spy with good biocompatibility
Different metal material, such as the composition of alloy of platinum, gold, tungsten, NiTi or these metals.In general, several embolism spring rings are placed on one
A scheduled position promotes thrombosis to block blood to flow through blood vessel or artery tumor in a specified pattern.
In general, currently, spring ring ways of relief has, hydrolysis is de-, electrolysis is de-, hot melt is freed and machinery frees four kinds of masters
The mode wanted.De- hydrolysis is that after filling solvent into conveying lever, the purpose of release spring circle is realized with dissolution characteristics, it exists
The unstable problem of ways of relief and the easy increase vascular pressure of injection solvent, if solvent insufficient infusion does not reach bullet again
The position that spring coil is freed, it is difficult to which realization is freed.De- electrolysis is that spring ring passes through together with electric welding between seal wire.It is welded cold
But welding portion can be uneven after, is easy to produce relatively high voltage, and spring ring is caused to power on the time freed from importing sheath not
It is easy to control, is electrolysed the de- time from 30 seconds to a few minutes etc..Hot melt is freed, and needs to introduce electric current, electric wire and electrode etc.,
It is that thermo-fuse is fused when heat reaches a certain level to realize that spring ring is freed by electric energy production heat.Hot melt
When can generate smoke event, lead to the intracorporal local damage of people, increase the pain of patient.Machinery frees current main stream approach
It is section cascaded, that is, increases by a movable connecting rod, movable connecting rod end is spherical characteristic, and movable connecting rod head end is with spring ring
Connection, escape wire are to be put into conveying together with movable connecting rod assembling to import sheath, and spring ring solution is realized by withdrawing escape wire
It is de-.
In the past, embolism spring ring is placed on the distal end for importing sheath.When the distal end for importing sheath is properly positioned, spring
Circle can release the end for importing sheath by push rod, in desired position release spring circle.This placement embolism spring
The process of circle is carried out under perspective, can monitor the movement of spring ring by the vascular of body in this way, and by spring
Circle is placed on desired position.
United States Patent (USP) 5,263,964 is disclosed another method and is related to being led using glue or welding spring ring to be connected to
On silk, and seal wire be placed on it is flexible import it is intrathecal, for spring ring to be navigated to the pre-selected locations in blood vessel.Once spring
Circle is in required position, and spring ring is held in place by importing sheath, and seal wire is drawn out, so that spring ring be made to be detached from seal wire
And it is discharged from importing in sheath.
It is in the distal end for importing sheath with one that United States Patent (USP) 5,350,397, which discloses the localization method of another spring ring,
Connector, for maintaining a ball.The diameter of this ball is typically larger than the outer diameter of spring ring, is placed on and imports sheath distal
In the inner cavity of connector, it then will import sheath and be moved in blood vessel, so that spring ring is placed on desired position.Once reaching
The position, in end, ball is released connector for by the proximate promotion by importing sheath by the push rod with piston, with
Just in desired locations release spring circle.
It is using heat-fusible that United States Patent (USP) 5,108,407, which discloses and places another method of embolism spring ring in the blood vessels,
Spring ring is maintained at the distal end for importing sheath by the bonding freed.This system transmits laser energy by using fiber optic cables, with
Apply heat to abutting edge, so as to from import sheath end release spring circle.
It includes an importing sheath, importing sheath tool that United States Patent (USP) 6,113,622, which discloses another spring ring conveying device,
Have through the lumen and remote spring circle for importing sheath whole length, for keeping spring ring so that spring ring is located in pre-determined bit
It sets.The distal tip for importing sheath is made of a kind of special material, it is characterised in that when the lumen for importing sheath is pressurized, distal tip
Hold radial dilatation in predetermined position release spring circle.
United States Patent (USP) 5,925,059 discloses another spring ring conveying device joined relieving mechanism on spring ring.
Interlocking end on spring ring has similar interlocking mechanism in push bar assembly.The control silk extended through locking mechanism is by bullet
Spring coil is fixed in push bar assembly.Push bar assembly and spring ring are initially positioned in the lumen for importing sheath.When spring ring quilt
When release importing sheath end is placed, control line is retracted, and spring ring is detached from from push bar assembly.
Another spring ring conveying device of United States Patent (USP) 2002/0165569 includes being releasably attached to push bar assembly
Distal end and the embolization device that is held in position with connector screw thread or fiber.Fiber, which passes through, can be activated to cut off connector fibre
The cutting assembly of dimension.Once connector fiber is cut off, embolization device is released.
United States Patent (USP) 2004/0034363 discloses another spring ring conveying device and combines one with stretch-proof group
The embolization device of part.Stretch-proof component is distally connected to embolism spring ring, stretch-proof component proximally by bonding agent or company
It is connected to the connection fiber of push bar assembly, is releasably attached in push bar assembly, and can be discharged by applying heat.
It includes a push silk and a rigidity that United States Patent (USP) 6,203,547, which discloses another spring ring conveying device,
Waveform end, it is connected on embolism spring ring and is placed in the inner cavity for importing sheath.Before spring ring is by importing sheath
Into until reaching the predetermined position in blood vessel, push silk is retracted at this time, and embolism spring ring is released.
United States Patent (USP) 11/143,052 discloses another for placing the further of stretch-proof embolization device or spring ring
Embolism spring ring conveying device includes that conveying imports sheath and flexible push bar assembly.Embolization device is kept by an interlocking mechanism,
The mechanism includes a release component, which passes through the hole in fastener.Engagement of loops on fastener and embolization device.
When release component is exited from hole, stretch-proof embolization device is released.
Utility model content
The purpose of this utility model is the problem inconvenient for existing all kinds of hemangioma embolism spring ring positioning releases, if
A kind of presumptive area that embolization device can be placed in human vas is counted, and realizes accurate positioning, frees quick embolism
Spring ring conveying device.
The technical solution of the utility model is:
A kind of embolism spring ring conveying device, it includes importing sheath 1 and push rod 2, and the distal end insertion of push rod 2 imports sheath
It is connected in 1 and with embolism spring ring 3, it is characterized in that the push rod 2, which is located on the distal end imported in sheath 1, is equipped with baffle ring 8,
Baffle ring 8 is equipped with clear opening 10 close to the side of push rod, and the proximal end of embolism spring ring 3 is connected with release ball 11, the release ball position
The positioning in baffle ring 8 is realized in the clear opening 10 and through escape wire 9, and the proximal end of escape wire 9 passes through push rod 2 and fixes
It is located in push rod and imports in the proximal end outside sheath；Push boom end, baffle ring 8, release ball 11 and the escape wire 9 constitutes bolt
Fill in spring ring relieving mechanism 4.
The label spring ring 5 of development is installed in the push rod 2.
The push rod 2 is located at the part imported outside sheath 1 and is equipped with several circle snap slots 12.
Limit plunger 7 is installed in the push rod 2, being equipped on escape wire 9 prevents escape wire with what limit plunger 7 matched
The position-limit mechanism excessively released.
The position-limit mechanism is the retention bead on 9 surface of escape wire, and the outer diameter of the retention bead is greater than in limit plunger 7
Through-hole.
The position-limit mechanism is welded by the dislocation of two escape wires, wherein an escape wire passes through after limit plunger 7 again
Across baffle ring 8, the end and limit plunger end face of another escape wire offset to limit the length that another escape wire is pierced by baffle ring.
The escape wire is the product that one of carbon steel, stainless steel, NiTi and its mixture are fabricated.
The escape wire surface is equipped with the PTFE coating for reducing friction or escape wire (9) outer surface is cased with a reduction
The PTFE plastic tube of friction.
The utility model has the beneficial effects that
The utility model has securely and reliably, and positioning accuracy is high, frees the features such as convenient and efficient.
The utility model can be performed the operation using minimally invasive intervention without operation of opening cranium and be sent by internal blood vessel
Bleeding part is blocked up to lesion, achievees the purpose that cure the sickness to save the patient.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the conveying device that the utility model is.
Fig. 2 is the structural schematic diagram before the embolism spring ring release of the release structure of the utility model.
Fig. 3 is the structural schematic diagram after the embolism spring ring release of the release structure of the utility model.
Fig. 4 is the push rod PI(polyimides of the utility model) structural schematic diagram of material area.
Fig. 5 is the structural schematic diagram of the snap slot of the utility model.
Fig. 6 is the snap slot operation of breakage schematic diagram of the utility model.
The escape wire and limit plunger that Fig. 7 is the utility model are with complete one of structural schematic diagram.
The escape wire and limit plunger that Fig. 8 is the utility model are with full second structural representation.
In figure: 1 is imports sheath, and 2 be push rod, and 3 be embolism spring ring, and 4 be relieving mechanism, and 5 be label spring ring (development
Point), 6 be heat-shrink tube, and 7 be limit plunger, and 8 be baffle ring, and 9 be escape wire, and 10 be clear opening, and 11 be release ball, and 12 be snap slot.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and examples.
As shown in figures 1 to 6.
A kind of embolism spring ring conveying device, it includes importing sheath 1 and push rod 2, as shown in Figure 1.It is installed in push rod 2
Have the label spring ring 5 of development, push rod 2 is located at the part imported outside sheath 1 and is equipped with several circle snap slot 12(such as Fig. 5), folding
The state that fractures of fault trough 12 is as shown in Figure 6.The distal end insertion of push rod 2 imports in sheath 1 and is connected with embolism spring ring 3, described
Push rod 2 be located on the distal end imported in sheath 1 baffle ring 8 be installed, baffle ring 8 is equipped with clear opening 10 close to the side of push rod
(such as Fig. 3), the proximal end of embolism spring ring 3 are connected with release ball 11(such as Fig. 2,3), which is located in the clear opening 10 and leads to
It crosses escape wire 9 and realizes the positioning in baffle ring 8, the proximal end of escape wire 9, which passes through push rod 2 and is fixed on push rod, is located at importing sheath
In outside；Push boom end, baffle ring 8, release ball 11 and the escape wire 9 constitutes embolism spring ring relieving mechanism 4.It is described
Push rod 2 in limit plunger 7 is installed, the limit for preventing escape wire from excessively releasing that matches with limit plunger 7 is equipped on escape wire 9
Position mechanism, the position-limit mechanism are the retention bead on 9 surface of Fig. 7 escape wire, and the outer diameter of the retention bead is greater than in limit plunger 7
Through-hole.The position-limit mechanism can be also welded to be shown in Fig. 8 by two escape wire dislocation, wherein an escape wire is worn
It is then passed through baffle ring 8 after crossing limit plunger 7, the end of another escape wire is offseted with limit plunger end face to limit another escape wire and wear
The length of baffle ring out.Escape wire can be fabricated by one of carbon steel, stainless steel, NiTi and its mixture.Freeing silk table
Face is equipped with the PTFE coating for reducing friction or escape wire (9) outer surface is cased with the PTFE plastic tube for reducing friction.
Details are as follows:
Fig. 1 shows a kind of example with the unique embolism spring ring conveying device for freeing structure of the utility model.It is defeated
Sending device includes the elongated submissive of the push rod 2 being connect by relieving mechanism 4 with embolism spring ring 3 and restraint release mechanism 4
Importing sheath 1.Embolism spring ring 3 can be transported to scheduled target area by human vas path by conveying device.
Relieving mechanism 4 includes the relieving mechanism first part of escape wire and the relieving mechanism second part of ball.Such as Fig. 1 institute
Show, push rod includes escape wire 9, and embolism spring ring 3 includes ball.2 distal end of ball and push rod of 3 proximal end of embolism spring ring
Escape wire is constrained in push rod 2, connects.In a kind of example, 2 length of push rod is 1800 millimeters.2 distal diameter of push rod
It is 0.01 inch.2 material of push rod can be 304 stainless steels.4 first part of relieving mechanism, i.e. 2 distal end escape wire of push rod, 9 end
Portion's semi-round ball utilizes laser hot melt molding.4 second part of relieving mechanism, i.e. 3 proximal end of embolism spring ring discharge ball using laser heat
It is melt into type.3 proximal end of embolism spring ring release ball is limited in the side of baffle ring 8 under the extruding of escape wire 9, realizes embolism bullet
The connection (such as Fig. 2) of spring coil 3 and push rod, when escape wire 9 is pulled out from baffle ring 8, the constraint release of release ball 11 discharges ball
The through-hole that can be easily threaded through on baffle ring 8, which achieves the separation of embolism spring ring 3 and push rod, complete release (such as Fig. 3
It is shown).
In Fig. 1 example, label spring ring (development point) 5 is placed in the specific region of 2 distal end of push rod.One layer smooth
PTFE(polytetrafluoroethylene (PTFE)) heat-shrink tube wraps up the distal end of push rod 2, including marks spring ring (development point) 5.
It is elongated hollow pipe that Fig. 1 display, which imports sheath 1, and cladding material is PP(polypropylene), inner layer material is that HDPE(is highly dense
Spend polyethylene).The length for importing sheath is 1300 millimeters.Proximal end operates entire transportation system using both hands, is conducive to clinical manipulation,
So that embolism spring ring 3 in place and release be easier to manipulate.
Before Fig. 2 shows that embolism spring ring 3 discharges, conveying device is located at the example in microtubular.Microtubular passes through patient's
Blood vessel is transported to needs by the lesion (such as aneurysm) of embolism.Routine operation needs guiding wire and guiding catheter to be inserted into.
Under Photo condition, relative distance between the development point and the development point of conveying device by observing microtubular, to judge to convey
The position of device.
Fig. 4 shows that the utility model uses unique using PI(polyimides) material as push rod component part, lead to
Cross using PI(polyimides) material increases the flexibility of push rod, the operation being more advantageous in surgical procedure.
When the distal end of microtubular and the utility model conveying device have been correctly positioned at target, embolism spring ring is
It can prepare to discharge.Push rod pushes forward relative to importing sheath promotes embolism spring ring to discharge.After reaching predetermined position, lead to
The snap slot that the Fig. 5 that fractures is shown is crossed, after snap slot region is broken off, is pulled such as Fig. 6, and according to by direction distally proximally
Proximal end plug, after extracting escape wire out by proximal end plug dragging, relieving mechanism second part is due to squeezing constraint release, embolism spring
Circle will automatically disengage (Fig. 3) with push rod and importing sheath.Fundamentally, it for importing sheath with respect to push rod, is kept fixed, passes through
Both hands operation push club shaft drives push rod to push forward.By change develop circle (push rod) and development enclose (microtubular) it
Between distance, it is easy to control push rod distal end enter predetermined lesion target at distance.
Conveying device is recalled from microtubular using both hands, above procedure conveying is repeated and discharges more embolism springs
Circle.
That is, the push rod group for importing sheath and push spring circle being passed through to curved importing sheath of elongated flexible
Part.Embolism spring ring is transported in blood vessel by the entire conveying device in addition to embolism spring ring, and push rod, which is located at, imports sheath
In, embolism spring ring is flexibly connected with push rod by relieving mechanism, and the push rod includes proximal part and distal portions, far
End part includes relieving mechanism first part, and the second part of relieving mechanism is connected with embolism spring ring, the relieving mechanism the
A part of constrain in push rod before the release of embolism spring ring between each other with the relieving mechanism second part is connected, and pushes away
Sending bar is the auxiliary constraint portions of relieving mechanism, and push rod pushes relieving mechanism to be detached from and imports sheath, in release embolism spring ring
In the process, the embolism spring ring containing relieving mechanism second part (is pushed away with relieving mechanism first part and auxiliary constraint portions
Send bar) it is detached from, the relieving mechanism first part leaves in situ during embolism spring ring discharges but does not change shape；Institute
There is a developing mark in the distal end for stating push rod, and the distal inner surface of the push rod has a label spring ring, it can make
Push rod along when importing sheath and pushing ahead, the entrance aneurysm for preventing push rod and embolism spring ring excessive discharges simultaneously
The structure of first part, mechanism can effectively avoid puncture aneurysm；The relieving mechanism second part is arranged in embolism spring ring
Proximal end, when the push rod drives the relieving mechanism first part to leave push rod distal end, the second part of relieving mechanism
It is detached from the constraint of push rod, the embolism spring ring of distal direction is discharged；The second part end of the relieving mechanism is sphere,
Spheroid form is circular；The distal end of the push rod is covered with one layer of smooth PTFE(polytetrafluoroethylene (PTFE)) to increase push rod
Push greasy property in the blood vessels, the distal portions length of push rod are PI(polyimides) material composition, have good
It is flexible.PI(polyimides) material modification and compound kind have excellent creep resistant or plastic deformation characteristic, be comprehensive
One of optimal high-molecular organic material of performance.For high temperature resistant up to 400 DEG C or more, long-term use temperature range is -200 ~ 300
DEG C, no sharp melting point is corrosion-resistant, and flame resistant does not absorb water, high mechanical strength.Due to higher intensity and low extensibility, can make
At thin-wall pipes.It is often used as the conveyer sheath tube material of minimally invasive interventional medicine engineering instrument.It can maximally reduce
The sectional area of conveyer reduces operation wound.The distal end of the push rod is equipped with constraint inner cavity and releases before the release of embolism spring ring
The first part of laying mechanism and second part are constrained in the constraint inner cavity of the push rod；The push rod proximal end with it is stainless
Steel pipe is by being welded together, and stainless steel tube is with escape wire by being welded together；The relieving mechanism first
Divide and move to the near end out push rod distal end, makes the relieving mechanism second part and the relieving mechanism first part and push rod
It is detached from.
The operate with method of the utility model is as follows:
1. entire conveying device, by haemostatic valve, microtubular enters human body, it is transported to target area.
2. left hand pinches push club shaft when reaching target area, the right hand pinches the heat-shrink tube that fractures of push club shaft
Region.
3. the right hand, which gently fractures, pushes club shaft, opposite direction, which fractures, again pushes club shaft to ensure that push club shaft is complete
It fractures and disconnected from each other.
4. the right hand pinches the push club shaft proximal end to fracture and carries out draw out operation, embolism spring ring discharges completely.
Certainly, the utility model creation is not limited to above embodiment, and those skilled in the art are not disobeying
Equivalent deformation or replacement can be also made under the premise of back the spirit of the present invention, these equivalent variation or replacement are all contained in this
Apply in claim limited range.
The parts not involved in the utility model is the same as those in the prior art or can be realized by using the prior art.
Claims (8)
1. a kind of embolism spring ring conveying device, it includes importing sheath (1) and push rod (2), and the distal end insertion of push rod (2) is led
Enter in sheath (1), distal end is connected with embolism spring ring (3), it is characterized in that being equipped with baffle ring on described push rod (2) distal end
(8), baffle ring (8) is equipped with clear opening (10) close to the distal end side of push rod, and the proximal end of embolism spring ring (3) is connected with release ball
(11), which is located in the clear opening (10) and realizes the positioning in baffle ring (8), escape wire (9) by escape wire (9)
Proximal end pass through push rod (2) and be fixed on push rod be located at import sheath outside proximal end in；The push rod is close, distal end
Portion, baffle ring (8), release ball (11) and escape wire (9) constitute embolism spring ring relieving mechanism (4).
2. embolism spring ring conveying device according to claim 1, it is characterized in that being equipped in the push rod (2) aobvious
The label spring ring (5) of shadow.
3. embolism spring ring conveying device according to claim 1, it is characterized in that the push rod (2), which is located at, imports sheath
(1) proximal end outside is equipped with several circle snap slots (12).
4. embolism spring ring conveying device according to claim 1, it is characterized in that installation is limited in the push rod (2)
Position plug (7) is equipped with the position-limit mechanism for preventing escape wire from excessively releasing to match with limit plunger (7) on escape wire (9).
5. embolism spring ring conveying device according to claim 4, it is characterized in that the position-limit mechanism is escape wire (9)
The retention bead on surface, the outer diameter of the retention bead are greater than the through-hole on limit plunger (7).
6. embolism spring ring conveying device according to claim 5, it is characterized in that the position-limit mechanism is freed by two
Silk dislocation is welded, wherein an escape wire is then passed through baffle ring (8), the end of another escape wire after passing through limit plunger (7)
It is offseted with limit plunger end face to limit the length that another escape wire is pierced by baffle ring.
7. embolism spring ring conveying device according to claim 1, it is characterized in that the escape wire be carbon steel, it is stainless
The product that one of steel, NiTi and its mixture are fabricated.
8. embolism spring ring conveying device according to claim 1 is reduced it is characterized in that the escape wire surface is equipped with
The PTFE coating of friction, or it is characterized in that described escape wire (9) outer surface is cased with the PTFE plastic tube for reducing friction.
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| CN201821516633.8U CN209220388U (en) | 2018-09-17 | 2018-09-17 | A kind of embolism spring ring conveying device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821516633.8U CN209220388U (en) | 2018-09-17 | 2018-09-17 | A kind of embolism spring ring conveying device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109044469A (en) * | 2018-09-17 | 2018-12-21 | 南京思脉德医疗科技有限公司 | A kind of embolism spring ring conveying device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109044469A (en) * | 2018-09-17 | 2018-12-21 | 南京思脉德医疗科技有限公司 | A kind of embolism spring ring conveying device |
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