CN216319398U - Adjustable bent conduit and adjustable bending device - Google Patents
Adjustable bent conduit and adjustable bending device Download PDFInfo
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- CN216319398U CN216319398U CN202121944970.9U CN202121944970U CN216319398U CN 216319398 U CN216319398 U CN 216319398U CN 202121944970 U CN202121944970 U CN 202121944970U CN 216319398 U CN216319398 U CN 216319398U
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Abstract
The utility model discloses an adjustable bending catheter and an adjustable bending device, wherein the adjustable bending catheter comprises an adjustable bending sheath tube and at least one bending wire; the adjustable bent sheath tube comprises a Tip head section, a bent section and a main body section which are sequentially connected in the axial direction, and a reinforcing layer for limiting the bending of the main body section is arranged in the main body section; the bending adjusting wire extends along the axial direction of the bending adjusting sheath tube and is arranged in the bendable section and the main body section; the first end of the bend adjusting wire is fixed on the end part of the bendable section close to the Tip head section, and the opposite second end penetrates out of the main body section. According to the adjustable bending catheter, the reinforcing layer is arranged in the main body section of the adjustable bending sheath catheter, so that the strength of the main body section is improved, the phenomenon of back arching along with the bending of the bendable section is avoided, the bending angle adjusting accuracy of the adjustable bending sheath catheter is ensured, and the catheter can smoothly reach a specified target position or smoothly convey an instrument to a target position.
Description
Technical Field
The utility model relates to the technical field of medical equipment, in particular to a bending-adjustable catheter and a bending-adjustable device.
Background
The interventional operation has less damage to human body and short operation time, so that the interventional operation is a medical technology which is rapidly developed and popularized in recent years. The catheter is used as an auxiliary instrument for interventional operation and is mainly used for establishing a channel between a human blood vessel and the outside so as to convey a diagnosis and/or treatment instrument. In order to adapt to individual differences of human physiological anatomical structures, the adjustable bending catheter is widely applied. The adjustable bending catheter is characterized in that an adjustable bending section is arranged at the far end of a catheter body of the catheter, and a handle of the catheter is controlled to drive a bending adjusting wire connected with the adjustable bending section to move along the axial direction, so that the far end of the catheter body is bent into different angles. When the bending angle accords with the specific physiological structural characteristics of the human body lumen, the control handle is stopped, the far end of the tube body is aligned with the entrance of the target lumen (such as a certain blood vessel), and then the diagnosis and/or treatment instrument is conveyed into the target lumen through the tube body.
Most of the existing bendable catheters are lined with a PTFE (polytetrafluoroethylene) tube, a fixing ring is sleeved at the near end (Tip end) of the PTFE tube, a bending adjusting wire is welded on the fixing ring and then penetrates into a traction cavity to be connected to a slide block of a handle at the far end, and a woven mesh tube is sleeved on the outer layer of the traction cavity, and then a Pebax layer is hot-melted to serve as the outermost layer.
The problems commonly existing in the prior adjustable bent catheter are as follows: in the bending adjusting process, the bending adjusting wire A is directly welded with the fixing ring and is easy to break, so that the bending adjusting function of the product is failed; B. the main body section of the catheter has the phenomenon of extrados, and the extrados is more obvious along with the larger bending angle, so that the bending angle is misaligned, the bending stroke loss is overlarge, the bending force is overlarge, and the like, so that the catheter is difficult to reach a specified target position, or an instrument cannot be smoothly conveyed to a target position, and even blood vessels and organs are damaged in severe cases.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an arch back resistant adjustable bending conduit and an adjustable bending device with the adjustable bending conduit.
The technical scheme adopted by the utility model for solving the technical problems is as follows: providing an adjustable bending catheter, which comprises an adjustable bending sheath and at least one adjustable bending wire;
the adjustable bent sheath tube comprises a Tip head section, a bent section and a main body section which are sequentially connected in the axial direction, and a reinforcing layer for limiting the bending of the main body section is arranged in the main body section;
the bending adjusting wire extends along the axial direction of the bending adjusting sheath tube and is arranged in the bendable section and the main body section; the first end of the bend adjusting wire is fixed on the end part of the bendable section close to the Tip head section, and the opposite second end penetrates out of the main body section.
Preferably, the reinforcing layer is formed by spirally winding at least one group of metal wires or polymer material wires along the circumferential direction; or the reinforcing layer is a hollow reinforcing pipe.
Preferably, the adjustable bent sheath tube comprises a lining tube, a reinforcing mesh tube and an outer layer tube which are sequentially coated outside the lining tube in the radial direction; the reinforcing layer is positioned between the lining pipe and the reinforcing mesh pipe or between the reinforcing mesh pipe and the outer layer pipe in the main body section;
a developing ring is arranged in the Tip head section and is positioned between the lining pipe and the reinforcing mesh pipe; a fixing ring is arranged in the end part of the bendable section close to the Tip head section, and the fixing ring is positioned between the lining pipe and the reinforcing mesh pipe; the bend adjusting wire is positioned between the lining pipe and the reinforcing net pipe, and the first end of the bend adjusting wire is fixed on the fixing ring.
Preferably, the first end part of the bend adjusting wire is bent to form a hook part and is hooked on the fixing ring;
the annular wall of the fixing ring is provided with a notch matched with the hook part.
Preferably, the adjustable bending sheath tube further comprises at least one threading tube; the threading tube extends along the axial direction of the adjustable bending sheath tube and is attached to the inner lining tube of the bendable section and the main body section, one end of the threading tube is abutted against the fixing ring, and the other opposite end of the threading tube penetrates out of the main body section; the bending adjusting wire is arranged in the wire penetrating pipe in a penetrating mode.
Preferably, the inner diameter of the threading tube is 0.10-0.80mm, and the wall thickness is 0.01-0.50 mm; the outer diameter of the bend adjusting wire is 0.05-0.80 mm.
Preferably, the wire threading pipe comprises a first wire threading pipe section and a second wire threading pipe section which are connected in the axial direction; the first wire-passing pipe section is attached to the inner lining pipe of the bendable section, and the second wire-passing pipe section is attached to the inner lining pipe of the main body section and penetrates out of the main body section;
the first wire-passing pipe section is a PTFE pipe; the second wire-passing pipe section is a PI pipe or a PEEK pipe.
Preferably, the adjustable bending sheath further comprises a transition section connected between the bendable section and the main body section in the axial direction.
The utility model also provides an adjustable bending device, which comprises any one of the adjustable bending catheter and the adjusting handle; and the second end of the bending adjusting wire of the bending adjustable catheter is connected to the adjusting handle.
Preferably, the adjusting handle comprises a handle body, an adjusting knob arranged on the handle body and a traction sliding block arranged in the handle body; the second end of the bending adjusting wire is connected to the traction sliding block;
the adjusting knob is provided with an internal thread, and the traction sliding block is provided with an external thread matched with the internal thread; the regulating and controlling rotation drives the traction sliding block to move axially when rotating relative to the handle body, and the bending adjusting wire is pulled while the traction sliding block moves axially.
The adjustable bending catheter is used for establishing a channel between a human blood vessel and the outside so as to convey a diagnosis and/or treatment instrument; the reinforcing layer is arranged in the main body section of the bendable sheathing canal, so that the strength of the main body section is improved, the phenomenon of an arch back cannot occur along with the bending of the bendable section, the bending angle adjusting precision of the bendable sheathing canal is ensured, and the catheter is further ensured to smoothly reach an appointed target position or smoothly convey an instrument to a target position.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic structural diagram of an adjustable bending conduit of an adjustable bending apparatus according to an embodiment of the present invention in an unbent state;
FIG. 2 is a schematic structural diagram of an adjustable bending conduit of an adjustable bending apparatus according to an embodiment of the present invention in a bending state;
FIG. 3 is a schematic structural view of an adjustable bend conduit according to an embodiment of the present invention;
FIG. 4 is a schematic view of the internal structure of the bendable sheath of the bendable catheter shown in FIG. 3;
FIG. 5 is a schematic view of a radial cross-section of a first embodiment of a reinforcement layer in the tunable bend conduit of the present invention;
FIG. 6 is a schematic view of a radial cross-section of a second embodiment of a reinforcement layer in the steerable catheter of the present invention;
fig. 7 is a schematic view of a radial cross-section of a third embodiment of a reinforcement layer in the steerable catheter of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, an adjustable bending apparatus according to an embodiment of the present invention includes an adjustable bending catheter and a control handle 200, wherein the adjustable bending catheter includes an adjustable bending sheath 100 and at least one bending wire 300. The adjustable bending sheath 100 is inserted into and connected to the control handle 200 at one end, and the bending adjusting wire 300 is connected between the adjustable bending sheath 100 and the control handle 200, so that the bending adjusting wire 300 is pulled by operating the control handle 200, and the adjustable bending sheath 100 is pulled by the bending adjusting wire 300 to be bent.
The adjustable bending sheath 100 may comprise a Tip head segment 10, a bendable segment 20 and a main body segment 40 connected in sequence in the axial direction. The bending adjusting wire 300 extends along the axial direction of the bending adjusting sheath 100 and is arranged in the bendable section 20 and the main body section 40; the first end of the bending wire 300 is fixed on the end of the bendable section 20 near the Tip head section, and the opposite second end penetrates out of the main body section 40 and is connected with the adjusting handle 200. The bending-adjustable sheath 100 is deformed and bent by the bendable section 20 under the action of the traction force of the bending-adjusting wire 300 to form a desired bending-adjusting angle.
In order to avoid the problem of extrados of the main body segment 40, in the present invention, as shown in fig. 3 and 4, a reinforcing layer 50 for limiting the bending of the main body segment 40 is provided in the main body segment 40. The reinforcing layer 50 is disposed along the circumferential direction of the main body segment 40 to form a hoop wrap, and the length of the reinforcing layer 50 extends along the axial direction of the main body segment 40.
The reinforcing layer 50 may be made of metal such as stainless steel, high temperature resistant polymer material, or the like.
In an alternative embodiment, the reinforcing layer 50 is formed by at least one set of metal wires or polymer material wires spirally wound in a circumferential direction, preferably stainless steel wires; the diameter of the metal wire or polymer material wire may be 0.05-1.00 mm. For the reinforcing layer 50 formed by spirally winding a plurality of groups of metal wires or polymer material wires, the groups can be uniformly distributed at intervals along the circumferential direction of the main body section 40, and the included angle between the spirally winding angle and the axial direction of the main body section 40 is 30-60 degrees.
In another alternative embodiment, the reinforcement layer 50 is a hollow tube, and the tube may have a wall thickness of 0.05 to 1.00 mm. The hollow forms on the reinforcing pipe can be flexibly arranged according to actual conditions, for example, but not limited to, mesh hollows, hollows formed by porous interval distribution and the like.
With reference to fig. 3 and 4, the adjustable bending sheath tube 100 includes a lining tube 101, a reinforcing mesh tube 102 and an outer layer tube 103 sequentially covering the lining tube 101 in the radial direction, that is, the Tip head section 10, the bendable section 20 and the main body section 40 sequentially include the lining tube 101, the reinforcing mesh tube 102 and the outer layer tube 103 from inside to outside in the radial direction.
Wherein, Tip head section 10 is used as the distal end of adjustable bent sheath 100, and developing ring 104 is arranged therein to perform the developing function. The developing ring 104 is mainly sleeved on the lining pipe 101 in the Tip head section 10 and is positioned between the lining pipe 101 and the reinforcing mesh pipe 102.
The end of the bendable section 20 near the Tip head section 10 is provided with a fixing ring 105 for fixing a first end of the bend adjusting wire 300. The retaining ring 105 is primarily fitted over the inner liner 101 within the bendable section 20, between the inner liner 101 and the reinforcing mesh tube 102. The bending adjusting wire 300 is attached to the inner lining tube 101 of the bendable section 20 and the main body section 40 along the axial direction of the bending adjusting sheath 100, and its first end is fixed to the fixing ring 105.
The first end of the bend adjusting wire 300 may be attached to the fixing ring 105 by spot welding. In order to improve the connection strength between the two and improve the tensile strength, in this embodiment, the first end of the bending adjusting wire 300 is bent to form a hook 301, and is hooked on the fixing ring 105 in a hooking manner, so that the bending adjusting wire 300 can bear a larger bending adjusting force than a spot welding manner.
For example, for the spot welding connection mode between the bend adjusting wire 300 and the fixing ring 105, the mean value of the breaking force at the welding point is 30.2N; for the hooking mode between the bending adjusting wire 300 and the fixing ring 105, the mean value of the breaking force at the hooking position is 71.8N, which is obviously superior to the spot welding connection mode.
In order to prevent the bending adjusting wire 300 from moving along the circumferential direction of the fixing ring 105 after being hooked, the ring wall of the fixing ring 105 is provided with a notch 106 matched with the hook 301, and thus the hook 301 of the bending adjusting wire 300 is hooked in the notch 106 for positioning.
The wrapping of the reinforcing mesh tube 102 around the outer circumference of the liner 101 also wraps the tuning wire 300 such that the tuning wire 300 is positioned between the liner 101 and the reinforcing mesh tube 102. The outer tube 103 is wrapped around the reinforcing mesh tube 102 as the outermost layer. The reinforcing mesh tube 10 is usually a metal woven mesh tube, and the inner lining tube 101 and the outer layer tube 103 can be adhered together through hot melting, and meanwhile, the reinforcing mesh tube 10 is also covered between the two.
In the main body segment 40, the reinforcing layer 50 may be sleeved on the outer periphery of the lining pipe 101, between the lining pipe 101 and the reinforcing mesh pipe 102, or between the reinforcing mesh pipe 102 and the outer layer pipe 103. Preferably, in order to ensure that the reinforcing layer 50 is covered by a structural layer with a certain thickness outside the reinforcing layer 50 and ensure the flatness of the outer periphery of the adjustable bending sheath 100, the reinforcing layer 50 is preferably arranged between the lining pipe 101 and the reinforcing mesh pipe 102, so that the outer periphery of the reinforcing layer 50 has the structural layer formed by the lining pipe 101 and the reinforcing mesh pipe 102.
When the reinforcing layer 50 is a spiral cylinder, it can be formed by spirally winding a metal wire or a high-temperature-resistant polymer material wire along the circumferential direction of the lining pipe 101, or be pre-spirally wound to form a spiral cylinder and then be sleeved on the lining pipe 101; when the reinforcing layer 50 is a reinforcing pipe, it is prepared in advance and sleeved on the liner pipe 101.
As shown in fig. 5, in the first embodiment of the reinforcing layer 50, two sets of metal wires or high temperature resistant polymer material wires are spirally wound along the circumferential direction of the lining tube 101; each group of metal wires (or polymer material wires) comprises two metal wires (or polymer material wires). The ends of the two groups of metal wires or high-temperature-resistant polymer material wires are opposite in the circumferential direction of the liner pipe 101; the thread rings formed by the two groups of metal wires or the high-temperature resistant polymer material wires are parallel.
As shown in fig. 6, in the second embodiment of the reinforcing layer 50, four sets of metal wires or high temperature-resistant polymer material wires are spirally wound along the circumferential direction of the lining tube 101; each group of metal wires (or polymer material wires) comprises two metal wires (or polymer material wires). The ends of the four groups of metal wires or high temperature resistant polymer material wires are uniformly distributed at intervals in the circumferential direction of the liner pipe 101, and the included angle of the two adjacent groups of ends in the circumferential direction is 90 degrees; the thread rings formed by the four groups of metal wires or high-temperature-resistant polymer material wires are parallel.
As shown in fig. 7, in the third embodiment of the reinforcing layer 50, eight groups of metal wires or high temperature resistant polymer material wires are spirally wound along the circumferential direction of the inner lining tube 101; each group of metal wires (or polymer material wires) comprises two metal wires (or polymer material wires). The ends of eight groups of metal wires or high temperature resistant polymer material wires are uniformly distributed at intervals in the circumferential direction of the liner tube 101, and the included angle of the ends of two adjacent groups in the circumferential direction is 45 degrees; the eight groups of metal wires or high-temperature-resistant polymer material wires form thread rings which are parallel.
In combination with the three embodiments of the reinforcement layer 50 described above, the strength of the reinforcement layer 50 increases as the number of metal wires or high temperature resistant polymer material wire sets increases. Further, since the inner lining pipe 101 and the outer layer pipe 103 are usually connected by hot melt adhesion, in order to ensure a sufficient adhesion area between the inner lining pipe 101 and the outer layer pipe 103 in the main body section 40, the number of the metal wires or the high temperature resistant polymer material wires in the reinforcing layer 50 is not too large, preferably at most eight, so that enough hollow areas are formed between the spiral cylinders for adhesion between the inner lining pipe 101 and the outer layer pipe 103.
The reinforcing layer 50 is preferably formed by spirally winding a stainless steel wire or by a hollow stainless steel tube, and has a rough outer surface, so that the reinforcing layer can be well fused with the outer tube 103 (adopting a Pebax tube) of the main body section 40, so that the outer tube 103 has a strong pulling force, and the outer tube 103 of the main body section 40 is prevented from being deformed to bend the arch back.
The adjustable bending sheath 100 further comprises at least one threading tube 60; the threading tube 60 is attached to the inner lining tube 101 of the bendable section 20 and the main body section 40 along the axial extension of the adjustable bending sheath 100, one end of the threading tube 60 is abutted to the fixing ring 105, and the other opposite end is passed out of the main body section 40. The bending adjusting wire 300 is inserted into the wire passing tube 60, and the hook 301 on the first end of the bending adjusting wire passes through the wire passing tube 60 and then is matched with the notch 106 on the fixing ring 105. The length of the threading tube 60 that passes out of the body section 40 is less than the length of the second end of the bending wire 300 that passes out of the body section 40.
The number of the threading tubes 60 corresponds to the number of the bending adjusting wires 300, and each threading tube 60 is internally provided with one bending adjusting wire 300. Alternatively, the inner diameter of the threading tube 60 may be 0.10-0.80mm, with a wall thickness of 0.01-0.50 mm; the outer diameter of the bend adjusting wire 300 may be 0.05-0.80mm to facilitate axial movement within the wire feed tube 60.
Further, the adjustable bending sheath 100 further includes a transition section 30 connected between the bendable section 20 and the main body section 40 in the axial direction. It will be appreciated that the wire feed tube 60 and the bend adjusting wire 300 pass through the bendable section 20, the transition section 30 and the main body section 40 in sequence as they extend axially along the bend adjusting sheath 100, while being attached to the inner liner tube 101 of the bendable section 20, the transition section 30 and the main body section 40.
In the adjustable bending sheath pipe 100, a Tip head section 10, a bendable section 20 and a transition section 30 which are connected in sequence form a bending adjusting section of the adjustable bending sheath pipe 100, and the adjustable bending sheath pipe can be bent to have a required bending adjusting angle; in contrast, the main body section 40 is a straight pipe section of the adjustable bending sheath 100, and does not cause problems such as extrados and the like along with bending of the adjustable bending section.
In addition, in terms of material, the inner liner 101 of the bending-adjustable sheath 100 is preferably a PTFE (polytetrafluoroethylene) tube, and the entire inner liner 101 of the bending-adjustable sheath 100 is integrally configured.
In terms of the material of the outer tube 103, the bend-adjusting section needs to be bent, the outer tube 103 located at the bend-adjusting section is made of a thermoplastic polymer material with soft quality, a lower melting point and better biocompatibility, and can be preferably made of 35D Pebax, the melting point of which is 144 ℃, and the biocompatibility of which is good, so that the outer tube is a common thermoplastic material for medical catheters. The main body section 40 needs to reduce bending as much as possible, the outer layer tube 103 located in the main body section 40 is made of a thermoplastic polymer material with hardness, a lower melting point and better biocompatibility, a Pebax material with hardness of 72D can be preferably selected, the melting point is 176 ℃, the biocompatibility is good, the Pebax material is a common thermoplastic material for medical catheters, and the hardness of the main body section 40 is greatly increased.
The hardness requirements of the bending adjusting section and the main body section 40 in the corresponding bending adjustable sheath tube 100 are different, and the wire penetrating tube 60 is correspondingly made of materials with different hardness. Specifically, the threading tube 60 may include a first threading tube segment and a second threading tube segment that are axially joined; the first wire-threading section is attached to the inner lining tube 101 of the bendable section 20, and the second wire-threading section is attached to the inner lining tube 101 of the main section 40 and passes through the main section 40.
The first wire-threading pipe section is made of a high polymer material which is soft, high in melting point and biocompatible, preferably a PTFE pipe, and the melting point of the PTFE pipe is 327 ℃. When the inner lining pipe 101 and the outer layer pipe 103 are hot-melt adhered at high temperature (such as 180 ℃, or increased and decreased according to actual conditions), the PTFE pipe is heated and does not soften, so that the inner cavity space is not lost, because the temperature is far lower than the melting point of the PTFE pipe. In addition, the inner surface of the PTFE pipe is smooth, the friction coefficient is low, and the friction with the bending adjusting wire 300 is small, so that the bending adjusting resistance is reduced, and the bending adjusting is facilitated.
The second wire-passing pipe section is made of a high polymer material which is hard, high in melting point and biocompatible, and preferably a PI (polyimide) pipe or a PEEK (polyether ether ketone) pipe. For PI tubes, the melting point is 334 ℃; similarly, when the liner pipe 101 and the outer layer pipe 103 are thermally fused and adhered to each other, the PTFE pipe is heated and does not soften, which leads to the loss of the inner cavity space. In addition, the PI pipe has self-lubricating property, so that the friction coefficient of the inner surface is low, and the friction with the bending adjusting wire 300 is small, thereby reducing the bending adjusting resistance, being beneficial to bending adjustment and simultaneously strengthening the main body section 40.
As also shown in fig. 1-4, the adjustment handle 200 may include a handle body 201, an adjustment knob 202 disposed on the handle body 201, and a traction slider 203 disposed within the handle body 201. The part of the threading tube 60, which penetrates out of the main body section 40, is accommodated in the handle body 201, and the second end of the bending wire 300, which penetrates out of the main body section 40, is also accommodated in the handle body 201. And, the second end of the bending wire 300 is connected with the traction slider 203.
The regulation knob 202 is provided with an internal thread, the traction sliding block 203 is provided with an external thread matched with the internal thread, and the traction sliding block 203 is movably connected with the regulation knob 202 through thread matching. The adjusting knob 202 is rotatable relative to the handle body 201, when the adjusting knob 201 rotates relative to the handle body 201, the pulling slider 203 is driven to move along the axial direction of the sheath tube 100, the pulling slider 203 pulls the bending adjusting wire 300 while moving along the axial direction, and the bendable section 20 of the sheath tube 100 is pulled by the bending adjusting wire 300 to be bent.
The adjustable bending catheter is used for establishing a channel between a human blood vessel and the outside so as to convey a diagnosis and/or treatment instrument. In use, an operator rotates the control knob 202 of the control handle 200 to bend the bendable section 20 of the bendable sheath 100 to form an angle with the main body section 40 to align with a target lumen access (e.g., a blood vessel), and then stops the rotation to deliver diagnostic and/or therapeutic instruments through the tube into the target lumen.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An adjustable bending catheter is characterized by comprising an adjustable bending sheath and at least one bending wire;
the adjustable bent sheath tube comprises a Tip head section, a bent section and a main body section which are sequentially connected in the axial direction, and a reinforcing layer for limiting the bending of the main body section is arranged in the main body section;
the bending adjusting wire extends along the axial direction of the bending adjusting sheath tube and is arranged in the bendable section and the main body section; the first end of the bend adjusting wire is fixed on the end part of the bendable section close to the Tip head section, and the opposite second end penetrates out of the main body section.
2. The adjustable bending catheter according to claim 1, wherein the reinforcing layer is formed by spirally winding at least one group of metal wires or polymer material wires along the circumferential direction; or the reinforcing layer is a hollow reinforcing pipe.
3. The adjustable bending catheter according to claim 1, wherein the adjustable bending sheath tube comprises an inner lining tube, a reinforcing mesh tube and an outer layer tube which are sequentially coated outside the inner lining tube in the radial direction; the reinforcing layer is positioned between the lining pipe and the reinforcing mesh pipe or between the reinforcing mesh pipe and the outer layer pipe in the main body section;
a developing ring is arranged in the Tip head section and is positioned between the lining pipe and the reinforcing mesh pipe; a fixing ring is arranged in the end part of the bendable section close to the Tip head section, and the fixing ring is positioned between the lining pipe and the reinforcing mesh pipe; the bend adjusting wire is positioned between the lining pipe and the reinforcing net pipe, and the first end of the bend adjusting wire is fixed on the fixing ring.
4. The adjustable bend catheter according to claim 3, wherein the first end of the adjustable bend wire is bent to form a hook and hooked on the fixing ring;
the annular wall of the fixing ring is provided with a notch matched with the hook part.
5. The adjustable bend catheter of claim 3, wherein the adjustable bend sheath further comprises at least one threading tube; the threading tube extends along the axial direction of the adjustable bending sheath tube and is attached to the inner lining tube of the bendable section and the main body section, one end of the threading tube is abutted against the fixing ring, and the other opposite end of the threading tube penetrates out of the main body section; the bending adjusting wire is arranged in the wire penetrating pipe in a penetrating mode.
6. The adjustable bend catheter according to claim 5, wherein the inner diameter of the threading tube is 0.10-0.80mm, and the wall thickness is 0.01-0.50 mm; the outer diameter of the bend adjusting wire is 0.05-0.80 mm.
7. The adjustable bend catheter of claim 5, wherein the wire feed tube comprises first and second wire feed tube segments joined axially; the first wire-passing pipe section is attached to the inner lining pipe of the bendable section, and the second wire-passing pipe section is attached to the inner lining pipe of the main body section and penetrates out of the main body section;
the first wire-passing pipe section is a PTFE pipe; the second wire-passing pipe section is a PI pipe or a PEEK pipe.
8. The adjustable bend catheter of claim 1, wherein the adjustable bend sheath further comprises a transition segment axially connected between the bendable segment and the main body segment.
9. An adjustable bending device, which is characterized by comprising the adjustable bending catheter and a regulating handle of any one of claims 1-8; and the second end of the bending adjusting wire of the bending adjustable catheter is connected to the adjusting handle.
10. The adjustable bending device according to claim 9, wherein the adjustment handle comprises a handle body, an adjustment knob disposed on the handle body, a traction slider disposed within the handle body; the second end of the bending adjusting wire is connected to the traction sliding block;
the adjusting knob is provided with an internal thread, and the traction sliding block is provided with an external thread matched with the internal thread; the adjusting knob drives the traction sliding block to move axially when rotating relative to the handle body, and the bending adjusting wire is pulled while the traction sliding block moves axially.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121944970.9U CN216319398U (en) | 2021-08-18 | 2021-08-18 | Adjustable bent conduit and adjustable bending device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121944970.9U CN216319398U (en) | 2021-08-18 | 2021-08-18 | Adjustable bent conduit and adjustable bending device |
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| CN216319398U true CN216319398U (en) | 2022-04-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117244153A (en) * | 2023-11-15 | 2023-12-19 | 上海翊科聚合物科技有限公司 | Three-dimensional adjustable bent catheter and preparation method thereof |
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2021
- 2021-08-18 CN CN202121944970.9U patent/CN216319398U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117244153A (en) * | 2023-11-15 | 2023-12-19 | 上海翊科聚合物科技有限公司 | Three-dimensional adjustable bent catheter and preparation method thereof |
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