CN1225030A - Combination of a capsule for brachytherapy and a guidewire - Google Patents
Combination of a capsule for brachytherapy and a guidewire Download PDFInfo
- Publication number
- CN1225030A CN1225030A CN 97196185 CN97196185A CN1225030A CN 1225030 A CN1225030 A CN 1225030A CN 97196185 CN97196185 CN 97196185 CN 97196185 A CN97196185 A CN 97196185A CN 1225030 A CN1225030 A CN 1225030A
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- guide wire
- capsule
- adapter
- combination
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Abstract
Combination of a capsule of radiation source for brachytherapy and a guidewire, wherein the capsule connected to the guidewire via a adapter which including cable or line with flexiblity larger than the guidewire.
Description
The capsule of the radioactive source that uses in the dress brachytherapy in the present invention relates to and the combination of guide wire.
This combination is known in practice, and at United States Patent (USP) the 4th, 861, is described in No. 520, and this patent is used for referencial use in this manual.
For the local radiotherapy of human body specific internal zone as the wall portion of tumor or blood vessel, as United States Patent (USP) the 4th, 861, No. 520 described, and the pin by a hollow, flexible pipe or conduit or analog can be delivered to the capsule that has radioactive source by area for treatment.For this purpose, adopt so-called " (afterloading) loaded in the back " technology usually.At first conduit or analog are put into body, the capsule that will be connected in the guide wire far-end is then delivered to area for treatment by remote control unit.
On the one hand, capsule and guide wire combination should have the flexible of height and should have certain rigid on the other hand so that can follow the curve of conduit or analog, push its far-end to thereby can pass conduit by guide wire.In order to use in the short treatment of interior blood vessel, conduit has 1.5mm or littler internal diameter usually.The length of capsule depends on the intensity that needs of the radioactive source that is placed in the capsule, but should be several times of diameter, for example in the scope of 5-7mm.Capsule itself and be not flexible with being connected of guide wire, therefore, the front portion of guide wire and capsule combination has quite low flexible.Therefore, capsule can not or be difficult to by the bending section in the strong curvature conduit, and this has certain probability.
The objective of the invention is to alleviate the problems referred to above, in general, is to make up in order to obtain a kind of capsule and guide wire, and it can be applied in many occasions in reliable mode, is included in the situation that will pass rapid crooked route in conduit or the analog.
For achieving the above object, combinations thereof is characterised in that: capsule is connected in guide wire by an adapter, and wherein, this adapter comprises flexible cable or line greater than guide wire.
The accompanying drawing of some embodiment of contrast describes the present invention in detail now.
Fig. 1 represents the sketch map according to first embodiment of combination of the present invention;
Fig. 2 represents the sketch map according to second embodiment of combination of the present invention.
Fig. 1 represents the sketch map of first embodiment of the combination of brachytherapy capsule 1 and guide wire 2.As shown in the figure, capsule comprises one or more radioactive sources, for example little iridium rod 3.Guide wire 2 comprises a cablet 4 in known manner, and this cablet near-end is provided with connecting piece 5 so that handle the guide wire that has capsule.Usually, cablet 4 has substantially the diameter identical with capsule 1.Cablet 4 is soft, solid, and therefore, it can be used for capsule was pushed away conduit or analog on the one hand, can follow the crooked route in conduit or the analog on the other hand again.The diameter of cablet can not be significantly less than the internal diameter of conduit or analog, this is that capsule is with respect to the just no longer clear qualification in the position of the near-end of conduit or analog like this owing to like this just do not have and make cablet be stuck in danger in the zigzag path in conduit or the analog.
In known combination, capsule for example is connected in the far-end of cablet by a connection piece 6 by laser weld.Therefore, the front end of guide wire constitutes a quite inflexible entity, thereby has limited capsule is followed rapid buckling curve in conduit or analog ability.According to the present invention, improved front end flexible of capsule and guide wire combination, this is owing to have the far-end that the capsule of its connector directly is not connected in cablet 4, but has than the cablet 4 wire adapter of high flexible more by one.The more high flexible of this needs can be obtained by line or the cable of using flexible more good material and/or the mode that gives the structure of better flexible line or cable.Above-mentioned adapter for example can partly be made of a short cable, and this weak point cable is partly with than the guide wire filament of more number more itself, but its diameter is identical with guide wire.This embodiment is illustrated among Fig. 1.One end of the adapter 8 among Fig. 1 for example connects with Laser Welding 9, axially with its end face against capsule 3 or be placed on connector 6 on the capsule, thereby longitudinal centre line is positioned on the mutual extended line substantially.The other end for example connects by Laser Welding 10 according to similar mode, makes its head surface be positioned at the far-end of guide wire.
According to a preferred embodiment of the present invention, guide wire and capsule make up the big flexible by using an adapter to obtain of far-end, and the diameter of this adapter is less than guide wire itself and capsule.Line that diameter is less or cable mean that naturally similar line or cable that diameter group is bigger have bigger flexible.Certainly can strengthen above-mentioned effect by the mode that adopts more flexible material and/or structure and/or give the combination of better flexible line or cable.Therefore, for example adapter can be made with more much thinner silk than guide wire itself.This embodiment is illustrated among Fig. 2.One end of the adapter 20 of tube reducing for example is connected in a suitable connector 22 by Laser Welding 21 from its head surface, and this connector is connected in capsule 1 again.At the other end, adapter 20 for example is connected in the far-end of guide wire with its head surface by Laser Welding 23.At two ends, the longitudinal centre line of adapter substantially respectively with the central lines of guide wire or connector and capsule.In illustrated example, also use a short shell 24, it is placed on being connected in guide wire and being welded on the end of guide wire of adapter.The internal diameter of this shell fits on the adapter shell cunning, and the external diameter of this shell equals the diameter of guide wire 2 substantially.
Adopt this shell, even after bending many times, can prevent that also the most external filament of adapter from getting loose from welding and termination.In the embodiment of a practicality, for example, the cable of the 0.9mm diameter that guide wire can be made by 1 * 19 filament constitutes, and the cable of the 0.72mm diameter that flexible bigger adapter then can be made by 7 * 7 filaments constitutes.Therefore, this shell for example can have ± length of 2mm.In the embodiment of a practicality, adapter can have for example length of 10-15cm, and the total length of combination can be about 2m.
It should be noted that according to the description of front, various modifications are conspicuous to those skilled in the art.This point also is applicable to size naturally, and these sizes just provide as an example, and in addition, the selection of the structure and material of cable also is like this.Such modification belongs in the scope of the invention.
Claims (5)
1. the capsule of the radioactive source of using in the interior dress brachytherapy and the combination of guide wire is characterized in that: capsule is connected in guide wire by an adapter, and wherein, adapter comprises flexible cable or line greater than guide wire.
2. combination according to claim 1 is characterized in that: the diameter of adapter is less than guide wire.
3. combination according to claim 1 and 2 is characterized in that: adapter and guide wire are welded to each other with its leading edge, and wherein, each longitudinal centre line is basic mutually to be overlapped.
4. according to claim 2 or 3 described combinations, it is characterized in that: the shell around adapter is placed on the end that is connected in guide wire of adapter, and this shell is welded on the guide wire with its head surface.
5. combination according to claim 4 is characterized in that: described shell and guide wire have essentially identical external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97196185 CN1225030A (en) | 1996-07-05 | 1997-07-04 | Combination of a capsule for brachytherapy and a guidewire |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1003528 | 1996-07-05 | ||
| CN 97196185 CN1225030A (en) | 1996-07-05 | 1997-07-04 | Combination of a capsule for brachytherapy and a guidewire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1225030A true CN1225030A (en) | 1999-08-04 |
Family
ID=5179620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97196185 Pending CN1225030A (en) | 1996-07-05 | 1997-07-04 | Combination of a capsule for brachytherapy and a guidewire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1225030A (en) |
-
1997
- 1997-07-04 CN CN 97196185 patent/CN1225030A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |