CN210784867U - Head end self-expanding telescopic extension catheter - Google Patents
Head end self-expanding telescopic extension catheter Download PDFInfo
- Publication number
- CN210784867U CN210784867U CN201921244093.7U CN201921244093U CN210784867U CN 210784867 U CN210784867 U CN 210784867U CN 201921244093 U CN201921244093 U CN 201921244093U CN 210784867 U CN210784867 U CN 210784867U
- Authority
- CN
- China
- Prior art keywords
- head end
- pipe
- expanding
- self
- catheter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The utility model belongs to PCI surgical equipment field discloses a scalable extension pipe of head end self-expanding formula specifically is a pipe of taking out the thrombus that takes off and carries support and block up the blood vessel in the PCI art, and the setting is in guiding the pipe, including the collector tube, the one end fixedly connected with connecting pipe of collector tube, the other end of collector tube is the head end, and the head end is self-expanding elasticity tubular structure, and the collector tube is connected to the one end of connecting pipe, other end connection handle. The utility model discloses simple structure, the design is novel, can effectual parcel live the support and the thrombus of off-loading to pull back in pointing the guide tube, the success rate is high, requires lowly to the art person, can prevent again that the support girder steel from causing to cut to rub and damage to the head end inner wall of guiding the guide tube.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to PCI surgical equipment, specifically be a pipe of taking out operation to the thrombus of off-loading support and jam blood vessel in coronary artery intervention treatment.
Background
Percutaneous Coronary Intervention (PCI) refers to a treatment method for improving myocardial blood perfusion by dredging a narrow or even occluded coronary artery lumen through a cardiac catheter technique, wherein a catheter is a guide catheter, and the coronary artery lumen is treated by pushing and pulling a stent, a balloon, a guide wire and the like through the guide catheter. In order to prevent restenosis of a coronary artery lumen, a stent is placed in the coronary artery lumen, so that an interventional treatment scheme aiming at coronary heart disease, namely coronary stent placement, is an important means for coronary heart disease treatment at present, and only 2018 shows that the total cases of coronary heart disease interventional treatment in mainland China reach more than 92 ten thousands of cases.
At present, stents placed in coronary artery are pre-loaded on a balloon, the stents are released by expanding the balloon when reaching a predetermined position, sometimes the stents are displaced relative to the balloon loaded with the stents before being delivered to the predetermined position, namely, the stents are unloaded, the unloading rate of the stents is internationally reported to be 0.5%, the reason of the unloading is that ① pushes the stents too hard to be clamped in lesions and fall off the balloon when the lesions with serious calcification are caused by tortuosity, ② has poor coaxiality of a guide catheter and a coronary artery mouth, the proximal end edge of the stent scrapes the head end of the guide catheter to partially or completely fall off the balloon, ③ has poor adhesion with the stent, meets resistance in the pushing process, and the stents are unloaded from the balloon, once the stents are slightly larger, the recovery is difficult, even the stents need to be taken out by surgical operation, and serious complications such as vascular wall damage, intravascular thrombosis and even death of patients are caused.
The method comprises the steps of ① balloon retraction method, balloon feeding along an original guide wire to a small balloon, balloon retraction after expansion at the distal end of a stent is theoretically feasible but has low success rate, sometimes the stent is seriously deformed, ② double-guide-wire winding method, balloon feeding outside the stent wall, rotating two guide wires outside the stent body to wind the small balloon, generally the balloon feeding along the original guide wire to release the stent in situ, expanding the stent after expansion if necessary, the method is convenient, the stent is actually released at a position not needing the stent, the number of stents placed in a patient is increased, a stent placed at a distal end of a target position through the stent is required to be placed, the number of stents placed at the target position is increased, the stent is required to be placed through a target position, the stent is increased through a high-guide-wire insertion guide catheter, the catheter is required to be placed into a target position, the catheter is increased, the number of stents are required to be placed into the target position through a high-guide catheter, the catheter is increased, the patients are guided by a high-puncture method, the high-stent is required for a high-stent implantation guide catheter, and the patients are not required to be placed through a high-puncture method, the high-puncture method is required for a high-puncture method, the patients are required for inserting and the patients, the patients are increased.
In addition, 80-90% of clinical acute myocardial infarction is due to thrombosis, which blocks the coronary artery supplying blood to the myocardium, therefore, if the coronary artery interventional therapy is carried out, the thrombosis blocking the coronary artery can be pumped out, so that the blood vessel is recovered to be unobstructed, more myocardium can be saved, the implantation of cardiovascular stents is reduced, and sometimes, the stents do not need to be implanted at all. The suction efficiency is related to the area of a lumen at the head end of the suction catheter, and the maximum area of the lumen head end of the coronary artery thrombus suction catheter used clinically at present is only 0.93mm2The suction efficiency is low, the large thrombus can not be sucked out, and the clinical requirement can not be met.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, provide a head end from scalable extension pipe of formula of expanding.
In order to solve the technical problem, the utility model provides a technical scheme does:
the utility model discloses a head-end self-expanding telescopic extension catheter which is arranged in a finger guide catheter, and comprises a recovery catheter, wherein one end of the recovery catheter is fixedly connected with a connecting tube, the other end of the recovery catheter is a head end, and the head end is a self-expanding elastic tubular structure; one end of the connecting pipe is connected with the recovery pipe, and the other end of the connecting pipe is connected with the handle.
In the utility model, the self-expanding elastic tubular structure of the head end is a composite elastic hose with a net-shaped framework, the net-shaped framework is formed by weaving thin metal wires, and when the head end is positioned in the finger guide tube, the pipe diameters of the head end are consistent; the net-shaped framework is positioned in the pipe wall of the head end hose, and the inner wall and the outer wall of the head end are both planes.
Furthermore, the net-shaped framework is in a rhombic grid shape along the axial direction of the head end, and the net-shaped framework is folded into a Z-shaped spring shape along the radial direction of the head end.
Furthermore, the thin metal wire is an elastic metal wire, the inclined state of the net-shaped framework woven by the thin metal wire is an expanded state, and the inclined state of the head end is an expanded state after the head end extends out of the guide catheter.
The utility model discloses in, the length of recovery tube is 25cm, and the recovery tube external diameter that shrink state income was in the guide pipe is 1.7mm, and the internal diameter is 1.47mm, and wall thickness 115 mu m, the length of head end are 1cm, the connecting tube length is 120 cm.
Furthermore, the head end is in an expanded state after extending out of the guide catheter, the outer diameter of the expanded state is 3mm, the wall thickness is 100 mu m, the inner diameter is 2.8mm, and the working area is 6.15mm2。
Furthermore, when the head end is in an expanded state, the part connected with the recovery pipe on the head end is in a structure with gradually changed thickness, the outer diameter is smoothly changed, and the guide pipe is convenient to pull back the recovery pipe and the head end of the recovery pipe.
The utility model discloses in, the formula elasticity tubular structure that expands certainly of head end can be replaced by from expanding network structure, is woven by thin metal wire and forms, and the inclination state of head end is for stretching out the enlarged state after guiding the pipe, and thin metal wire is the elastic metal wire.
In the present invention, the thin metal wire at the head end is a thin steel wire or a thin nitinol wire.
The utility model discloses in, the recovery tube adopts the outer layer of polyethylene plastics, steel wire to weave the three-layer composite tube body structure of middle level, Polytetrafluoroethylene (PTFE) undercoating except that the head end.
In the utility model, the diamond grid woven by the thin metal wires at the head end can be more connected with the overall structure and improve the stability compared with the square grid woven by the metal wires along the axial direction or the metal wires along the axial direction and the metal wires along the circumferential direction, so that the whole net shape is more integrally coordinated during deformation; the netted skeleton of head end is along the Z type spring form that the radial folding formed of recovery tube, stores elastic potential energy in netted skeleton, and when the shrink form income of head end indicated in the guide tube, Z type spring compression energy storage, after the head end stretched out and guides the pipe, Z type spring released elastic potential energy, struts the head end hose, realizes the effect that the head end is from expanding.
The utility model discloses in, the scalable extension pipe of head end self-expanding uses in the PCI operation, walks in guiding the pipe, and the internal diameter that current 6F guided the pipe is 1.78mm, and the recovery tube is 40 μm with the clearance that guides between the pipe for the recovery tube can be around or rotatory free activity in guiding the pipe under the promotion of connecting pipe. The head end is of a self-expanding structure and is in a contraction state when being positioned in the guide tube, the head end is self-expanded after extending out of the guide tube, the inner diameter of the unfolding part is 2.8mm, and the working area is 6.15mm2The opening of (2), the head end can be with its natural income in the head end after the inflation after contacting the off-loading support this moment, hold the off-loading support, can wrap up the support that off-loads when preceding recovery pipe, pull back and retrieve the pipe, can pull back the support that off-loads together in step, retrieve and indicate the intraductal back of pipe, the head end is the natural shrink under the injecing of guide pipe, and further extrude the support that has retrieved, can firm seizure and retrieve the off-loading support, high efficiency, can prevent again that the deformation girder steel of off-loading support from damaging patient's blood vessel and guide the pipe.
The utility model discloses in, the head end is used in the PCI operation from scalable extension pipe of formula of expanding, is applicable to the extraction to endovascular thrombus equally, and it is similar to retrieve the off-loading support working process, and the head end of recovery tube contacts behind debris such as endovascular thrombus, can wrap up the thrombus in the head end after expanding with its natural income, can wrap up the thrombus when preceding recovery tube, is guiding the tail end of pipe and extracts with the negative pressure, and the head end of recovery tube is inhaled the thrombus and is guided in the pipe to reach the treatment purpose of taking out the thrombus, sometimes also can make things convenient for the support on next step to put into the operation.
Compared with the prior art, the utility model has simple structure and novel conception, can effectively wrap off-loaded stent and thrombus to be pulled back into the finger guide tube, and has high success rate; the steel beam can be coated outside the bracket to isolate the bracket from the guide conduit, so that the head end and the inner wall of the guide conduit are prevented from being scratched and damaged by the steel beam of the bracket; the operation process is simple, the difficulty is low, the requirement on an operator is not high, repeated operation can be performed when the operator is unsuccessful once, the repeated operation has no influence on a patient, and the success rate of the operation is effectively improved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of the head end of the present invention in a contracted state;
fig. 3 is a schematic view of the head end of the present invention in an expanded state;
fig. 4 is a schematic diagram of a head end according to another embodiment of the present invention.
In the figure: a recovery tube 1, a connecting tube 2, a head end 3, a handle 4 and a guide catheter 5.
Detailed Description
The invention will be further described with reference to the drawings and specific preferred embodiments without limiting the scope of the invention.
The first embodiment is as follows:
a head end self-expanding telescopic extension catheter is shown in figures 1-3 and comprises a recovery tube 1 and a connecting tube 2, one end of the recovery tube 1 is fixedly connected with one end of the connecting tube 2, the other end of the recovery tube 1 is a head end 3, the head end 3 is a composite elastic hose with a net-shaped framework, the net-shaped framework is formed by weaving thin metal wires, when the head end 3 is positioned in a guide catheter 5, the pipe diameter of the head end 3 is consistent, the net-shaped framework is positioned in the pipe wall of the hose of the head end 3, the inner wall and the outer wall of the head end 3 are both planes, the net-shaped framework is in a rhombic grid shape along the axial direction of the head end 3, the net-shaped framework is radially folded into a Z-shaped spring shape along the head end 3, the thin metal wires are elastic metal wires, the inclined state of the net-shaped framework woven by the thin metal wires is an expanded state, the inclined state of, when the recovery tube is accommodated in the guide tube 5, the recovery tube is in a contracted state, and when the head end 3 is in an expanded state, the part of the head end 3 connected with the recovery tube 1 is in a structure with gradually changed thickness, and the outer diameter is smoothly changed; the other end of the connecting pipe 2 is connected with a handle 4.
In the utility model, the length of the recovery tube is 25cm, the outer diameter of the recovery tube which is contained in the guide catheter in a contraction state is 1.7mm, the inner diameter is 1.47mm, the wall thickness is 115 mu m, the length of the head end is 1cm, and the length of the connecting tube is 120 cm; the head end is expanded after extending out of the guide catheter, the outer diameter is 3mm, the wall thickness is 100 mu m, the inner diameter is 2.8mm, the length of the head end is shortened to 0.5cm, and the working area is 6.15mm2。
Example two:
the head end self-expanding telescopic extension catheter, a recovery tube 1, a connecting tube 2 and an embodiment are consistent, a head end 3 is a composite elastic hose with a net-shaped framework, the net-shaped framework is woven by thin metal wires, when the head end 3 is positioned in a guide catheter 5, the pipe diameter of the head end 3 is consistent, the net-shaped framework is positioned in the pipe wall of the hose of the head end 3, the inner wall and the outer wall of the head end 3 are both planes, the net-shaped framework is in a rhombic grid shape along the axial direction of the head end 3, the net-shaped framework is folded into a Z-shaped spring shape along the radial direction of the head end 3, the thin metal wires are elastic metal wires, the inclined state of the net-shaped framework woven by the thin metal wires is an expanded state, the inclined state of the head end 3 is an expanded state after extending out of the guide catheter 5, the weaving density of the thin metal wires at the opening of the head end 3 is sparser than the connection, when the head end 3 is in an expanded state, the part of the head end 3 connected with the recovery pipe 1 is set to be in a structure with gradually changed thickness, and the outer diameter is changed smoothly; the other end of the connecting pipe 2 is connected with a handle 4.
Example three:
a head end self-expanding telescopic extension catheter is shown in figure 4, a recovery tube 1 and a connecting tube 2 are consistent with the embodiment, a head end 3 is a composite elastic hose with a net-shaped framework, the net-shaped framework is formed by weaving thin metal wires, when the head end 3 is positioned in a guide catheter 5, the pipe diameters of the head end 3 are consistent, the net-shaped framework is positioned in the pipe wall of the hose of the head end 3, the inner wall and the outer wall of the head end 3 are both planes, the net-shaped framework is in a rhombic grid shape along the axial direction of the head end 3, the net-shaped framework is folded into a Z-shaped spring shape along the radial direction of the head end 3, the thin metal wires are elastic metal wires, the inclined state of the net-shaped framework woven by the thin metal wires is an expanded state, the inclined state of the head end 3 is an expanded state after extending out of the guide catheter 5, the head end 3 extends out of the guide catheter 5 and then self-expands, the, the part of the head end 3 connected with the recovery pipe 1 is set to be of a structure with gradually changed thickness and diameter, and the outer diameter is changed smoothly.
Example four:
the head end is from scalable extension pipe of formula of expanding, recovery tube 1, connecting pipe 2 and embodiment one by one, head end 3 is the netted elastic construction of formula of expanding certainly that thin wire weaves, head end 3's inclination state is the inflation state after stretching out guide pipe 5, thin wire is elastic metal wire, receive and restraint and energy storage after the pressurized, head end 3 stretches out guide pipe 5 after from expanding, when the income is in guide pipe 5 is the shrink state, when head end 3 inflation state, the part that is connected with recovery tube 1 on the head end 3 sets up to the structure of thickness gradual change, the external diameter smooth change.
In the present invention, the thin metal wire at the head end is a thin steel wire or a thin nitinol wire.
The utility model discloses in, the recovery tube adopts the outer layer of polyethylene plastics, steel wire to weave the three-layer composite body structure of middle level, polytetrafluoroethylene undercoating except that the head end.
When the utility model is applied to the recovery of the unloaded coronary artery stent in the PCI operation, the head end 3 is firstly contracted, the recovery tube 1 is sent into the guide catheter 5 and is pushed forwards until the head end 3 extends out of the front end of the guide catheter 5, and the pushing is continued after the head end 3 naturally expands, so that the head end 3 is wrapped on the unloaded stent; and then the recovery pipe 1 is pulled back, the head end 3 clamps the deformed steel beam of the unloading support and recovers the deformed steel beam into the guide conduit 5 together, at the moment, the self-expanding structure of the head end 3 is compressed, and the compressed head end 3 extrudes the deformed steel beam of the support, so that the deformed steel beam of the support and the guide conduit 5 are prevented from being scratched, then the recovery pipe 1 is pulled back, and the support is pulled out of the guide conduit, so that the recovery of the unloading support is finished. The utility model discloses when being applied to in the PCI operation to the extraction of thrombus in the blood vessel, it is similar with retrieving to take off and carry the support working process, can be with its natural income in head end 3 after the debris such as thrombus in the blood vessel are contacted to head end 3 of recovery tube 1, can wrap up the thrombus when preceding recovery tube 1, tail end with the negative pressure extraction at guide pipe 5, the head end of recovery tube 1 inhales the thrombus to guide pipe 5 in, and further extrude the thrombus of having retrieved, in order to reach the treatment purpose of taking out the thrombus, sometimes also can make things convenient for support on next step to put into the operation.
Therefore, the head end self-expanding telescopic extension catheter has simple structure and novel conception, can effectively wrap the off-load bracket to be pulled back into the finger guide tube, and has high success rate; the steel beam can be coated outside the bracket to isolate the bracket from the guide conduit, so that the head end and the inner wall of the guide conduit are prevented from being scratched and damaged by the steel beam of the bracket; the operation process is simple, the difficulty is low, the requirement on an operator is not high, repeated operation can be performed when the operator is unsuccessful once, the repeated operation has no influence on a patient, and the success rate of the operation is effectively improved.
Claims (8)
1. Scalable extension pipe of head end self-expanding, its characterized in that: the device is arranged in the guide catheter and comprises a recovery tube, one end of the recovery tube is fixedly connected with a connecting tube, the other end of the recovery tube is a head end, and the head end is of a self-expanding elastic tubular structure; one end of the connecting pipe is connected with the recovery pipe, and the other end of the connecting pipe is connected with the handle.
2. The tip self-expanding telescopic extension catheter of claim 1, wherein: the self-expanding elastic tubular structure of the head end is a composite elastic hose with a net-shaped framework, the net-shaped framework is formed by weaving fine metal wires, and when the head end is positioned in the finger guide tube, the pipe diameters of the head end are consistent; the net-shaped framework is positioned in the pipe wall of the head end hose, and the inner wall and the outer wall of the head end are both planes.
3. The tip self-expanding telescopic extension catheter of claim 2, wherein: the net-shaped framework is in a rhombic grid shape along the axial direction of the head end, and the net-shaped framework is folded into a Z-shaped spring shape along the radial direction of the head end.
4. The tip self-expanding telescopic extension catheter of claim 3, wherein: the thin metal wire is an elastic metal wire, the inclined state of the reticular framework woven by the thin metal wire is an expanded state, and the inclined state of the head end is the expanded state after the guiding catheter is extended out.
5. The tip self-expanding telescopic extension catheter of claim 1, wherein: the length of the recovery pipe is 25cm, the outer diameter of the recovery pipe which is contained in the guide catheter in a contraction state is 1.7mm, the inner diameter is 1.47mm, the wall thickness is 115 mu m, the length of the head end is 1cm, and the length of the connecting pipe is 120 cm.
6. The tip self-expanding telescopic extension catheter of claim 4, wherein: the head end is in an expanded state after extending out of the guide catheter, the outer diameter of the expanded state is 3mm, the wall thickness is 100 mu m, the inner diameter is 2.8mm, and the working area is 6.15mm2。
7. The tip self-expanding telescopic extension catheter of claim 4, wherein: when the head end is in an expanded state, the part connected with the recovery pipe on the head end is set to be in a structure with gradually changed thickness, and the outer diameter is changed smoothly.
8. The tip self-expanding telescopic extension catheter of claim 1, wherein: the head end is of a self-expanding net structure and is formed by weaving fine metal wires, the inclined state of the head end is an expanded state after the head end extends out of the guide catheter, and the fine metal wires are elastic metal wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921244093.7U CN210784867U (en) | 2019-08-02 | 2019-08-02 | Head end self-expanding telescopic extension catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921244093.7U CN210784867U (en) | 2019-08-02 | 2019-08-02 | Head end self-expanding telescopic extension catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210784867U true CN210784867U (en) | 2020-06-19 |
Family
ID=71234122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921244093.7U Active CN210784867U (en) | 2019-08-02 | 2019-08-02 | Head end self-expanding telescopic extension catheter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210784867U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110269731A (en) * | 2019-08-02 | 2019-09-24 | 韩战营 | The telescopically extendable conduit of head end self-inflated |
-
2019
- 2019-08-02 CN CN201921244093.7U patent/CN210784867U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110269731A (en) * | 2019-08-02 | 2019-09-24 | 韩战营 | The telescopically extendable conduit of head end self-inflated |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10588655B2 (en) | Methods and apparatus for treating embolism | |
| CN106618676B (en) | Intravascular thrombus taking-out device | |
| EP3381408B1 (en) | Assembly for distal embolic protection | |
| CN105943214B (en) | For the overturning conveying device and method of prosthese | |
| CN213963546U (en) | Double-layer embolectomy support | |
| CN211325322U (en) | Interlayer crevasse plugging system | |
| CN208910390U (en) | Take pin device and intervention medical system | |
| JPH08509406A (en) | Vascular prosthesis | |
| CN113208690A (en) | Thrombectomy support system with near-end protection and far-end protection functions | |
| CN210784867U (en) | Head end self-expanding telescopic extension catheter | |
| CN115500897A (en) | Sectional type bolt taking device | |
| JP2023171437A5 (en) | ||
| CN109452992B (en) | Ostomy appliance | |
| CN116138843B (en) | Bolt taking device with adjustable bolt taking support | |
| CN110269731A (en) | The telescopically extendable conduit of head end self-inflated | |
| CN207168608U (en) | Recoverable arteries filter | |
| CN116138844A (en) | Thrombus taking device capable of capturing various types of thrombus | |
| CN211749877U (en) | Thrombectomy support device with near-end protection and far-end protection functions | |
| CN210749389U (en) | Intravascular capture device | |
| CN109464229B (en) | Biliary tract spiral particle stent and stent conveying catheter set | |
| CN219763478U (en) | Get thing support, get thing device and get thing system | |
| CN204995616U (en) | That can take out covers net support | |
| CN107303206B (en) | Heart volume reduction implant capable of being inserted through apex of heart | |
| CN105662654A (en) | Coronary artery protecting device | |
| CN116058923B (en) | Composite type thrombus taking support, thrombus taking device and thrombus taking system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |