CN201356648Y - Saline perfusion RF ablation catheter - Google Patents
Saline perfusion RF ablation catheter Download PDFInfo
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- CN201356648Y CN201356648Y CNU2009200684091U CN200920068409U CN201356648Y CN 201356648 Y CN201356648 Y CN 201356648Y CN U2009200684091 U CNU2009200684091 U CN U2009200684091U CN 200920068409 U CN200920068409 U CN 200920068409U CN 201356648 Y CN201356648 Y CN 201356648Y
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- perfusion
- saline
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- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 title claims abstract description 135
- 239000011780 sodium chloride Substances 0.000 title claims abstract description 132
- 230000010412 perfusion Effects 0.000 title claims abstract description 124
- 238000007674 radiofrequency ablation Methods 0.000 title abstract 3
- 238000002679 ablation Methods 0.000 claims abstract description 69
- 150000003839 salts Chemical class 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 102000010637 Aquaporins Human genes 0.000 claims description 4
- 108010063290 Aquaporins Proteins 0.000 claims description 4
- 238000001816 cooling Methods 0.000 abstract description 6
- 210000004165 myocardium Anatomy 0.000 abstract description 3
- 210000001519 tissue Anatomy 0.000 abstract 2
- 230000000747 cardiac effect Effects 0.000 description 12
- 230000003387 muscular Effects 0.000 description 12
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002107 myocardial effect Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 108050006915 Aquaporin 7 Proteins 0.000 description 1
- 102100029406 Aquaporin-7 Human genes 0.000 description 1
- 206010049447 Tachyarrhythmia Diseases 0.000 description 1
- 208000001871 Tachycardia Diseases 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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Abstract
An improved saline perfusion RF ablation catheter comprises a catheter body (3), a saline channel pipe (7), an ablation electrode (2), a first group of saline perfusion holes (1) formed on the distal end of the ablation electrode (2) and at least one second group of saline perfusion holes (4), wherein the second group of saline perfusion holes are farther from the distal end of ablation electrode (2) than the first group of the saline perfusion holes (1). Accordingly, even if the side surface of the saline perfusion RF ablation catheter keeps contact with cardiac muscle tissue, the catheter can obviate the occurrence of nonuniform cooling of the saline due to longer size of the ablation electrode, thereby obviating incrustation of the cardiac muscle tissue caused by local overheat.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments, particularly relates to a kind of improved perfusion of saline radio-frequency (RF) ablation conduit.
Background technology
The radio-frequency (RF) ablation conduit is a kind of of electrophysiologicalcatheter catheter, is mainly used in operation on heart.
In operation, its percutaneous puncture and being admitted in the heart is positioned at the ablating electrode of distal end of catheter and the dispersing electrode at patient back this moment and constitutes the loop.The radio-frequency (RF) energy of radio-frequency (RF) ablation instrument emission is delivered to the cardiac muscular tissue that closely reclines with it by ablating electrode, its dehydration is solidified lose the conductivity function, thereby realize treatment tachy-arrhythmia purpose.
This Therapeutic Method had both been avoided patient's the hardship of opening breast, again can radical curing of disease, also can not cause any severe complication, and therefore obtained extensive use at home and abroad clinically.
Yet there is a major defect in traditional radio-frequency (RF) ablation conduit.In order to reach darker depth of ablation, can use higher ablation energy clinically, tend to cause cardiac muscular tissue's hot-spot like this and cause incrustation, thereby influenced the effectiveness and the safety of operation.
For this reason, be US 6,171 at publication number, in 275 the United States Patent (USP), a kind of " electrophysiologicalcatheter catheter (Irrigated split tip electrode catheter) that has perfusing hole at far-end " proposed.By being arranged on the perfusion of saline hole of ablating electrode far-end, a certain amount of normal saline of perfusion in the ablation procedure of operation.Saline can cool off ablating electrode and myocardial tissue surface when flowing out by the opening on the ablating electrode, so just can avoid the surface incrustation when guaranteeing depth of ablation, thereby improves the effectiveness and the safety of operation.
Shown in the accompanying drawing 8 is exactly the perfusion of saline radio-frequency (RF) ablation conduit of prior art, and what number in the figure 23 was represented is existing ablation catheter.At the far-end of the ablating electrode 22 of this radio-frequency (RF) ablation conduit 23, the perfusion of saline hole 21 that quantity does not wait along circle distribution, in order in ablation procedure, to pour into normal saline.In this article, for convenience of description, perfusion of saline radio-frequency (RF) ablation conduit is made far-end away from the end note of handgrip, its end note that handgrip is installed is made near-end.
But still there is defective in such structure.As shown in Figure 9, in ablative surgery, ablating electrode 22 might be close to myocardium inwall with its side.In this case, when cardiac muscular tissue was melted, radio-frequency (RF) energy was transmitted into the B zone and its thermal dehydration is solidified by ablating electrode 22.But because perfusion of saline hole 21 is positioned at the far-end of ablating electrode 22, therefore dabbling saline can only be washed into the far-end a-quadrant of ablating electrode and the cardiac muscular tissue that closely reclines with the a-quadrant, and can not cool off to whole ablating electrode 2 and with whole cardiac muscular tissues that it closely reclines.Especially when ablating electrode 22 longer dimensions, the cardiac muscular tissue that closely reclines away from the part of ablating electrode 22 far-ends, the C zone shown in Fig. 9 just is very easy to hot-spot occur and causes incrustation.
Summary of the invention
The purpose of this utility model is to overcome the above-mentioned defective of perfusion of saline radio-frequency (RF) ablation conduit.Even when perfusion of saline radio-frequency (RF) ablation conduit touch cardiac muscular tissue with its side, can not make that the refrigerative effect of flush saline is inhomogeneous because of the longer dimension of ablating electrode yet, thereby avoid causing cardiac muscular tissue's incrustation because of hot-spot.
To achieve these goals, according to an aspect of the present utility model, a kind of improved perfusion of saline radio-frequency (RF) ablation conduit is provided, first group of perfusion of saline hole that it has pipe shaft, salt water passage pipe, ablating electrode and is positioned at the ablating electrode far-end, wherein an end of the salt water passage pipe in first group of perfusion of saline hole and the pipe shaft communicates.The difference of itself and traditional perfusion of saline radio-frequency (RF) ablation conduit is that also comprise second group of perfusion of saline hole at least, it is than the far-end of first group of perfusion of saline hole away from ablating electrode.
Preferably, this utility model provides a kind of improved perfusion of saline radio-frequency (RF) ablation conduit, and wherein, second group of perfusion of saline hole is positioned on the ablating electrode, perhaps is positioned at the scope of pipe shaft far-end apart from ablating electrode 0-5mm.
Preferably, this utility model provides a kind of improved perfusion of saline radio-frequency (RF) ablation conduit, and wherein, the closer to the ablating electrode far-end, far away more apart from the salt aquaporin on the circumferential section of conduit, then the aperture in perfusion of saline hole is more little along the length direction of conduit; Length direction along conduit is got over away from the ablating electrode far-end, and near more apart from the salt aquaporin on the circumferential section of conduit, then the aperture in perfusion of saline hole is big more.Can guarantee the discharge pressure basically identical in all perfusion of saline holes like this, guarantee each Kong Junke water outlet.
Preferably, this utility model provides a kind of improved perfusion of saline radio-frequency (RF) ablation conduit, and wherein, the aperture of fill orifice is 0.1-1.0mm.Preferably, the aperture is 0.2-0.4mm.
Preferably, this utility model provides a kind of improved perfusion of saline radio-frequency (RF) ablation conduit, and wherein, along the length direction of radio-frequency (RF) ablation conduit, the spacing of second group of perfusion of saline pitch-row from first group of perfusion of saline hole is 0.5-5mm.Preferably, spacing is 0.5-3mm.
Preferably, this utility model provides a kind of improved perfusion of saline radio-frequency (RF) ablation conduit, and wherein, along the circumferencial direction of radio-frequency (RF) ablation conduit, the spacing in perfusion of saline hole is 0.1-3mm.Preferably, spacing is 0.2-2mm.
According on the other hand of the present utility model, a kind of improved perfusion of saline radio-frequency (RF) ablation conduit is provided, it has pipe shaft, salt water passage pipe, ablating electrode and is positioned at perfusion of saline hole on the ablating electrode, and an end of the salt water passage pipe in first group of perfusion of saline hole and the pipe shaft communicates.Wherein, in the scope of pipe shaft far-end, and/or on ablating electrode, also be provided with a plurality of length direction and equally distributed second group of perfusion of saline hole of circumferencial direction along conduit apart from ablating electrode 0-5mm.
When carrying out the radio-frequency (RF) ablation operation, cooling can be realized washing away to whole ablating electrode in the perfusion of saline hole of improved perfusion of saline radio-frequency (RF) ablation conduit, thereby eliminated the risk of hot-spot incrustation, guaranteed the depth of ablation of ablating electrode, improved the effectiveness and the safety of operation.
Description of drawings
Fig. 1 is the overall structure sketch map according to the perfusion of saline radio-frequency (RF) ablation conduit of an embodiment of the present utility model.
Fig. 2 is the far-end partial enlarged view of perfusion of saline radio-frequency (RF) ablation conduit shown in Figure 1.
Fig. 3 is the sketch map of perfusion of saline radio-frequency (RF) ablation conduit when melting shown in Figure 1.
Fig. 4 is the far-end partial enlarged view according to the perfusion of saline radio-frequency (RF) ablation conduit of second embodiment of the present utility model.
Fig. 5 is the far-end partial enlarged view according to the perfusion of saline radio-frequency (RF) ablation conduit of the 3rd embodiment of the present utility model.
Fig. 6 is the far-end partial enlarged view according to the perfusion of saline radio-frequency (RF) ablation conduit of the 4th embodiment of the present utility model.
Fig. 7 is the far-end partial enlarged view according to the perfusion of saline radio-frequency (RF) ablation conduit of the 5th embodiment of the present utility model.
Fig. 8 is the far-end partial enlarged view of existing perfusion of saline radio-frequency (RF) ablation conduit.
Fig. 9 is the sketch map of perfusion of saline radio-frequency (RF) ablation conduit when melting shown in Figure 8.
The specific embodiment
Below in conjunction with accompanying drawing preferred implementation of the present utility model is specifically described.
Fig. 1 is the overall structure sketch map according to the perfusion of saline radio-frequency (RF) ablation conduit of an aspect embodiment of the present utility model.
As shown in Figure 1, perfusion of saline radio-frequency (RF) ablation conduit 10 comprises pipe shaft 3, control handgrip 6, ring electrode 5, saline ingress interface 8, salt water passage pipe 7, ablating electrode 2, first group of perfusion of saline hole 1 and second group of perfusion of saline hole 4.
Wherein, pipe shaft 3 generally is to be made by the braided wires reinforced pipe (WireBraid Reinforced Tubing) of tinsel enhancing macromolecular material, ablating electrode 2 is installed on its far-end, links to each other, in order to the emission radio-frequency (RF) energy with electric lead (not shown) in the pipe shaft 3.Ablating electrode 2 its distal portions are provided with first group of perfusion of saline hole 1, and its part away from far-end is provided with second group of perfusion of saline hole 4.These two groups of perfusion of saline holes 1,4 all link to each other with the salt water passage pipe 7 that is positioned at pipe shaft 3 inside, and separate a segment distance at length direction along conduit, so that when radio-frequency (RF) ablation conduit 10 touch cardiac muscular tissue with its side, can cool off to whole ablating electrode 2 and with whole cardiac muscular tissues that ablating electrode 2 closely reclines.In addition, also the part of pipe shaft 3 close ablating electrodes 2 is provided with some ring electrodes 5.
In the proximal end of pipe shaft 3, control handgrip 6 links to each other with pipe shaft 3 and is fixing, is used for advance and retreat and rotation at operation control radio-frequency (RF) ablation conduit 10.Salt water passage pipe 7 is stretched out control handgrip 6, and is connected with standard Luer interface 8 at the end of salt water passage pipe 7, so that link to each other with the perfusion of saline pump.Like this in radio-frequency (RF) ablation operation, the normal saline of the setting flow that is poured into by the perfusion of saline pump can flow out from the perfusion of saline perforate 1,4 at ablating electrode 2 two ends.
Can be expressly understood present embodiment more with reference to Fig. 2.
Fig. 2 is the far-end partial enlarged view of perfusion of saline radio-frequency (RF) ablation conduit shown in Figure 1.In Fig. 2, can be clear that the two groups of perfusion of saline holes 1,4 that are positioned at ablating electrode 2 two ends.Particularly, ablating electrode 2 length are 4.0mm, and diameter is 2.3mm, and the two groups of perfusion of saline holes 1,4 on the ablating electrode 2 respectively have along equally distributed 6 holes of circumference, and the distance between two groups of perfusion of saline holes is 2.0mm.
Wherein, the aperture in first group of perfusion of saline hole 1 is 0.3mm, and the aperture in second group of perfusion of saline hole 4 is 0.35mm.Why different the diameter in each hole is, be for the consideration that adjusts water resistance, thereby the pressure of guaranteeing each perfusion of saline hole are in a basic balance, to realize washing away preferably cooling effect.Particularly, along the length direction of conduit, first group of perfusion of saline hole 1 is farther from the perfusion of saline pump than second group of perfusion of saline hole 4, thereby first group of perfusion of saline hole 1 have the diameter littler than second group of perfusion of saline hole 4, to reduce the resistance in exit.
In addition, though in the present embodiment each perfusion of saline hole in each group is made as and has identical diameter, but depart from salt aquaporin 7 under the situation at pipe shaft 3 centers, also the diameter in each perfusion of saline hole in each group can be made as difference, with the pressure in each perfusion of saline hole of further balance.
Fig. 3 is the sketch map of perfusion of saline radio-frequency (RF) ablation conduit when melting shown in Figure 1.In Fig. 3, can most clearly see, adopt the perfusion of saline radio-frequency (RF) ablation conduit of present embodiment, second group of newly-increased perfusion of saline perforate 4 can be washed away cooling to the near-end of ablating electrode 2 and with the cardiac muscular tissue D zone that it closely reclines, thereby eliminated the dead angle area C among Fig. 9.
Fig. 4 has shown the far-end partial enlarged view according to the perfusion of saline radio-frequency (RF) ablation conduit of second embodiment of the present utility model.In this embodiment, the length of ablating electrode 2 is 4.0mm, and diameter is 2.3mm.Second group of perfusion of saline hole 4 no longer is positioned on the ablating electrode 2, but is positioned near on the pipe shaft 3 of ablating electrode 2, is 2.0mm apart from the distance of ablating electrode 2, and the distance in first group of perfusion of saline hole 1 of distance is 4.8mm.
In this position, 4 the dabbling saline in second group of perfusion of saline hole also can wash away cooling to the near-end of ablating electrode 2 and with the region of myocardial tissue that it closely reclines, thereby eliminate dead angle area.In addition, because salt water passage pipe 7 avoided pyritous ablating electrode 2, thereby avoided Yin Gaowen and the ruckbildung that produces.
Wherein, the aperture in first group of perfusion of saline hole 1 is 0.3mm, and the aperture in second group of perfusion of saline hole 4 is 0.38mm, is along equally distributed 6 holes of circumference.Such aperture is to determine for the consideration of balance saline fill orifice pressure too.
If the size of ablating electrode 2 is longer, for example reach 8mm or longer, so also can design more perfusion of saline hole, to realize cooling, shown in Fig. 5-7 to whole ablating electrode.Fig. 5-7 has shown that respectively wherein the length of ablating electrode 2 is 8.0mm according to the far-end partial enlarged view of the perfusion of saline radio-frequency (RF) ablation conduit of the 3rd, the 4th and the 5th embodiment of the present utility model, and diameter is 2.6mm.
As shown in Figure 5, in the 3rd embodiment, except first group of perfusion of saline hole 1 being positioned at ablating electrode 2 two ends and second group of perfusion of saline hole 4, also have the 3rd group of perfusion of saline hole 9 at the middle part of ablating electrode 2, its distance with first group of perfusion of saline hole 1 and second group of perfusion of saline hole 4 equates, is 2.5mm; The diameter in three groups of perfusion of saline holes 1,9,4 is followed successively by 0.30mm, 0.34mm and 0.38mm, is along equally distributed 6 holes of circumference.By such structure, the incrustation that hot-spot causes in can effectively avoiding performing the operation.
As shown in Figure 6, according to another aspect of the present invention, in the 4th embodiment, second group of perfusion of saline hole 11 is at the length direction and the circumferencial direction uniform distribution of ablating electrode 2 upper edge conduits.Like this dabbling saline can wash away more equably ablating electrode 2 the surface and with its cardiac muscular tissue that closely reclines.
As shown in Figure 7, in the 5th embodiment, also have three groups of perfusion of saline holes 1,4,9.But different with the 3rd embodiment shown in Figure 5 is that second group of perfusion of saline hole 4 is positioned near on the pipe shaft 3 of ablating electrode 2.
Note that protection scope of the present invention is not limited to the described scope of preferred implementation.Those skilled in the art can carry out variations and modifications to preferred implementation, but in the protection domain that these variations and modification still are included in claims to be limited.
Claims (10)
1. improved perfusion of saline radio-frequency (RF) ablation conduit, this radio-frequency (RF) ablation conduit has pipe shaft (3), salt water passage pipe (7), ablating electrode (2) and is positioned at first group of perfusion of saline hole (1) of the far-end of ablating electrode (2), one end of the described salt water passage pipe (7) in described first group of perfusion of saline hole (1) and the described pipe shaft (3) communicates, it is characterized in that, described radio-frequency (RF) ablation conduit also comprises second group of perfusion of saline hole (4) at least, and it is than the far-end of described first group of perfusion of saline hole (1) away from described ablating electrode (2).
2. perfusion of saline radio-frequency (RF) ablation conduit as claimed in claim 1 is characterized in that described second group of perfusion of saline hole (4) is positioned on the described ablating electrode (2), perhaps is positioned at the scope of pipe shaft (3) far-end apart from ablating electrode 0-5mm.
3. perfusion of saline radio-frequency (RF) ablation conduit as claimed in claim 1 or 2, it is characterized in that, along the length direction of conduit the closer to ablating electrode (2) far-end, far away more apart from salt aquaporin (7) on the circumferential section of conduit, then the aperture of perfusion of saline hole (1,4) is more little, get over away from ablating electrode (2) far-end along the length direction of conduit, near more apart from salt aquaporin (7) on the circumferential section of conduit, then the aperture of perfusion of saline hole (1,4) is big more, thereby the discharge pressure of guaranteeing the perfusion of saline hole is consistent, and guarantees each Kong Junke water outlet.
4. perfusion of saline radio-frequency (RF) ablation conduit as claimed in claim 3 is characterized in that, aperture, described perfusion of saline hole (1,4) is 0.1-1.0mm.
5. perfusion of saline radio-frequency (RF) ablation conduit as claimed in claim 4 is characterized in that, the aperture of described perfusion of saline hole (1,4) is 0.2-0.4mm.
6. perfusion of saline radio-frequency (RF) ablation conduit as claimed in claim 3 is characterized in that, along the length direction of described radio-frequency (RF) ablation conduit, the spacing in the described first group of perfusion of saline hole of distance, described second group of perfusion of saline hole (4) (1) is 0.5-5mm.
7. perfusion of saline radio-frequency (RF) ablation conduit as claimed in claim 6 is characterized in that, along the length direction of described radio-frequency (RF) ablation conduit, the spacing in the described first group of perfusion of saline hole of distance, described second group of perfusion of saline hole (4) (1) is 0.5-3mm.
8. perfusion of saline radio-frequency (RF) ablation conduit as claimed in claim 3 is characterized in that, along the circumferencial direction of described radio-frequency (RF) ablation conduit, the spacing of described perfusion of saline hole (1,4) is 0.1-3mm.
9. perfusion of saline radio-frequency (RF) ablation conduit as claimed in claim 8 is characterized in that, along the circumferencial direction of described radio-frequency (RF) ablation conduit, the spacing of described perfusion of saline hole (1,4) is 0.2-2mm.
10. improved perfusion of saline radio-frequency (RF) ablation conduit, this radio-frequency (RF) ablation conduit has pipe shaft (3), salt water passage pipe (7), ablating electrode (2) and be positioned at first group of perfusion of saline hole (1) of the far-end of ablating electrode (2), one end of the described salt water passage pipe (7) in described first group of perfusion of saline hole (1) and the described pipe shaft (3) communicates, it is characterized in that, in described pipe shaft (3) the far-end distance scope of described ablating electrode 0-5mm, and/or on described ablating electrode (2), also be provided with a plurality of length direction and equally distributed second group of perfusion of saline hole of circumferencial direction (11) along conduit.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2009200684091U CN201356648Y (en) | 2009-03-04 | 2009-03-04 | Saline perfusion RF ablation catheter |
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| CNU2009200684091U CN201356648Y (en) | 2009-03-04 | 2009-03-04 | Saline perfusion RF ablation catheter |
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| CN102688090A (en) * | 2012-04-29 | 2012-09-26 | 殷跃辉 | Bidirectionally controllable saline-perfusion renal artery radiofrequency ablation catheter |
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