A kind of retrievable vena cava filterTechnical field
The utility model patent is related to a kind of cardiovascular system medical instrument, specifically a kind of recyclable filter chamber venous systemSwim thrombus in system, prevents pulmonary embolism, the Caval vein thrombus filter that pulmonary infarction occurs.
Background technology
The recyclable venous filter of lantern-shaped chamber or net shape retrievable vena cava filter, product occurred currently on the market existsAll it is the support using a cross bar as product in vena cave blood vessel, this pattern has good supporting role, but there are one notGood item is：Since the cross bar of supporting role is longer（More than 10mm）, cross bar both ends have a V-arrangement bifurcated, product plantingAfter entering human vas, inside the cross bar and V-arrangement bifurcated that vascellum endometrial hyperplasia tissue plays a supportive role package.As product is plantedThe angle of incidence more increases, and vein blood vessel inner wall hyperplasia tissue encapsulation is more, when Product recycling recycling resistance will extend with Implantation Time andBecome bigger, so that recycling becomes difficult, or even tearing venous patient vascular wall, major accident is caused, so such lantern-shaped is recyclableVena cava filter or net shape retrievable vena cava filter are being implanted into patient body under the premise of ensuring Clinical practice safetyTime it is all very short, be usually no more than 2 weeks.
Invention content
In order to keep product longer in the time being implanted into patient body, Product recycling is more smooth, also to make product in patient bodyInterior holding balance does not tilt, and the technical solution of the utility model is：A kind of retrievable vena cava filter is provided, the product oneEnd is the fixed hangnail net of band, plays fixed and filtering thrombus；Six supporting rods of other end band, play a supportive role, product fallsThorn and six support legs form dual balanced structure up and down, prevent product from tilting.
The utility model is filtered by recycling hook, Connection Release nut, connection curved bar, fixed hangnail, transiting rod, diamond shapeNet, connecting tube, lower support bar composition.
Recycling hook, connection curved bar, fixed hangnail, transiting rod, diamond shape filter screen, connecting tube, lower support bar are by NiTiCompo pipe is integrally formed through laser engraving, and Connection Release nut is process by nickel-titanium alloy material or stainless steel material.
The built-in Connection Release nut of the utility model recycling hook, is followed by 6 connection curved bars, and connection curved bar is S-shaped curvedSong, 6 connection curved bars are connected in 360 degree of equidistant arrangements with recycling hook.
Curved bar one end and recycling hook connection are connected, another termination fixes hangnail, and each connection curved bar is followed by a fixation and fallsThe longitudinal axis of thorn, fixed hangnail and product arranges after product expansion in 15 degree~an angle of 90 degrees degree.
This product contains 6 transiting rods, and transiting rod one end is connected with fixed hangnail, and the other end is connected with diamond shape filter screen.It crossesThe length for crossing bar is 2mm~10mm.Transiting rod is arranged with the product longitudinal axis in 15 degree~90 degree after product expansion.
This product contains 6 diamond shape filter screens, and at a circle in 360 degree, diamond shape filters arranged end 6 diamond shape filter screens two-by-twoNet one end is connected with transiting rod, and the other end is connected with connecting tube.4 sides of diamond shape filter screen are linear or S-shaped is bent.
Connection length of tube is 0.5mm~15mm.
This product contains 6 lower support bars, the S-shaped bending of lower support bar, 6 360 degree of lower support bar one end decilesArrangement is connect with connecting tube, and the other end is linearly rod-shaped, and the length of straight line pole is 1mm~30mm.
The effective benefit of the utility model is：Product transiting rod is in 15 degree~90 degree with the product longitudinal axis after product expansion,Implantation human body after do not connect with vascular wall inner membrance slightly, vascellum endometrial hyperplasia tissue can only climb cover the fixation hangnail contacted with vascular wall andLower support bar cannot climb in the v-shaped structure for covering and being formed to transiting rod and diamond shape filter screen junction, and when such Product recycling canIt is substantially reduced the recycling resistance of product, greatly prolongs Implantation Time of the product in human body.Hangnail is fixed under in another product topPortion's supporting rod, lower support structure in formation, can fully ensure that the balance of product in the blood vessels, prevent product from being washed away and people in bloodProduct tilts caused by body movement, anti-tampon filtering failure.
Description of the drawings
FIG. 1 is a schematic structural view of the utility model.
Fig. 2 is structural schematic diagram of the utility model fixation hangnail in lower support bar.
Specific implementation mode
Below according to attached drawing is illustrated, the utility model is described in further detail：
As described in Figure 1, the utility model is by recycling hook 1, Connection Release nut 2, connection curved bar 3, fixed hangnail 4, mistakeBar 5, diamond shape filter screen 6, connecting tube 7, lower support bar 8 is crossed to form.
A Connection Release nut 2 built in the utility model recycling hook 1, is followed by 6 connection curved bars 3, and connection curved bar 3 is in SShape is bent.6 connection curved bars 3 are connected with 360 degree of equidistant arrangements with recycling hook tail end 1.
Connection 3 one end of curved bar is connect with recycling hook 1, and another termination one fixes hangnail 4, and each connection curved bar 3 is followed by oneThe longitudinal axis of fixed hangnail 4, fixed hangnail 4 and product arranges after product expansion in 15 degree~an angle of 90 degrees degree.
This product contains 6 transiting rods 5, and 5 one end of transiting rod is connected with fixed hangnail 4, the other end and 6 phase of diamond shape filter screenEven.The length of transiting rod 5 is 2mm~10mm.Transiting rod 5 is arranged with the product longitudinal axis in 15 degree~90 degree after product expansion.
This product containing 6 diamond shape filter screens, 6,6 diamond shape filter screens 6 two-by-two arranged end at one circle be in 360 degree, diamond shape mistake6 one end of strainer is connected with transiting rod 5, and the other end is connected with connecting tube 7.4 sides of diamond shape filter screen are linear or S-shapedBending.
The length of connecting tube 7 is 0.5mm~15mm.
This product contains 6 lower support bars 8, the 8 S-shaped bending of lower support bar, 6 360 degree of 8 one end of lower support bar etc.Arrangement is divided to be connect with connecting tube 7, the other end is linearly rod-shaped, and the length of straight line pole is 1mm~30mm.
As described in Figure 2, it is another example of the utility model, which is that product fixes hangnail in lower support bar, connectionCurved bar is directly connected with transiting rod, between without fixed hangnail, remaining structure of product is same as Example 1.
The above, only the utility model representative instance, are not used in limitation the utility model, all in the utility modelOn the basis of improve and extension example both be within the protection scope of the present invention.