CN118236113B

CN118236113B - Spring coil system

Info

Publication number: CN118236113B
Application number: CN202410683203.9A
Authority: CN
Inventors: 荆洪娟; 付平; 宋维康; 黄嘉平
Original assignee: Hangzhou Yike Medical Technology Co ltd
Current assignee: Hangzhou Yike Medical Technology Co ltd
Priority date: 2024-05-30
Filing date: 2024-05-30
Publication date: 2024-07-30
Anticipated expiration: 2044-05-30
Also published as: CN118236113A

Abstract

The invention discloses a spring ring system, which comprises a push pipe, a release core wire, a release head and a spring ring connected with the release head, wherein the release core wire limits the release head in the push pipe, the push pipe comprises a guide section, a force transmission section and a control section, the guide section comprises a guide pipe and a spring group wound outside the guide pipe, the control section comprises a control pipe, the force transmission section comprises an inner lining pipe, an outer lining pipe and a supporting member nested between the inner lining pipe and the outer lining pipe, the hardness of the supporting member is greater than that of the inner lining pipe, the supporting member connects the guide pipe and the control pipe, the cross section of the supporting member is arc-shaped, so that a contact area exists between the inner lining pipe and the outer lining pipe, and only the inner lining pipe is partially supported, thereby realizing perfect balance of flexibility and rigidity while ensuring inherent flexibility of the inner lining pipe, and excellent trafficability and good operability of the force transmission section when traversing complex vascular paths.

Description

Spring coil system

Technical Field

The invention relates to the technical field of medical instruments, in particular to a spring ring system.

Background

Chinese patent No. CN110974332a discloses a mechanical release spring ring system, in which the distal end of the push rod is skillfully divided into two sections, and an elastic portion is connected at the boundary, which gives the distal end of the push rod greater flexibility. By this segmented design in combination with the resilient element, while significantly enhancing the flexibility of the distal end, it also presents new challenges: the device not only improves the complexity of the manufacturing process, but also can cause the rigidity of the whole push rod to be weakened, particularly the elastic region is excessively soft, which brings trouble to accurate control, particularly in the occasion of placing the spring ring with extremely high precision, the positioning deviation can be caused, and meanwhile, the difficulty of mechanical release is increased. In addition, excessive softness can also cause unsmooth thrust conduction, and operators need extra effort and time to push the push rod, thereby affecting the operation process; moreover, a distal end that is too flexible is prone to deformation or deflection under blood flow impact or vessel wall compression, posing a potential threat to operational stability and safety. Therefore, the core of the design of the distal end of the pushing rod is to balance flexibility and rigidity, ensure the stability and the accurate control of operation while adapting to the tortuosity of blood vessels.

Disclosure of Invention

The invention aims to solve the technical problem of providing a spring ring system aiming at the defects in the prior art.

According to the invention, there is provided a spring ring system comprising a push tube, a trip wire, a trip head and a spring ring connected with the trip head, the trip wire restraining the trip head in the push tube, the push tube comprising a guide section, a force transmission section and a manipulation section, the guide section comprising a guide tube and a spring group wound outside the guide tube, the manipulation section comprising a manipulation tube, the force transmission section comprising an inner liner tube, an outer liner tube and a support member nested between the inner liner tube and the outer liner tube, the support member having a hardness greater than that of the inner liner tube, the support member connecting the guide tube and the manipulation tube and having an arc-shaped cross section such that there is a contact area between the inner liner tube and the outer liner tube.

Further, the guide tube, the supporting member and the control tube are integrally formed into a tube body structure, the circumference of the tube body structure is provided with a notch, and the tube body structure corresponding to the notch forms the supporting member.

Further, the outer lining pipe extends towards the direction of the guide pipe and the control pipe at two ends respectively, so that the partial areas of the guide pipe and the control pipe are covered.

Further, the lining pipe is a spring pipe, a part of the spring pipe is inwards sunken to form an annular limiting groove, the release core wire is provided with an action protrusion with the size larger than that of the annular limiting groove, and the annular limiting groove can be propped open when the action protrusion extrudes the annular limiting groove.

Further, a supporting ring is arranged between the outer lining pipe and the inner lining pipe, and the supporting ring is arranged corresponding to the annular limiting groove to support the annular limiting groove.

Further, the action protrusion is formed in a shape of small at both ends and large in the middle.

Further, the longitudinal section of the action protrusion is elliptical.

Further, two action bulges are arranged, an action groove matched with the annular limiting groove is formed between the two action bulges, when the action groove is matched with the annular limiting groove, the annular limiting groove is not propped open by the action bulges, and the two action bulges are respectively positioned at two sides of the annular limiting groove.

Further, the action protrusion is formed into a shape with large ends and small middle, and an action groove matched with the annular limiting groove is formed in the middle of the action protrusion, and when the action groove is matched with the annular limiting groove, the annular limiting groove is not supported by the action protrusion.

Further, the longitudinal section of the action protrusion is concave.

Compared with the prior art, the force transmission section of the invention constructs a structure which can efficiently conduct force and also has flexibility and rigidity by integrating the inner lining pipe, the outer lining pipe and the supporting member between the inner lining pipe and the outer lining pipe. The support component adopts an arc-shaped cross section, directly connects the guide section and the control section, only carries out local support on the lining pipe, and realizes perfect balance of flexibility and rigidity while ensuring inherent flexibility of the lining pipe, thus ensuring excellent trafficability and good operability of the force transmission section when traversing a complex vascular path.

Drawings

The invention will be more fully understood and its attendant advantages and features will be more readily understood by reference to the following detailed description, taken in conjunction with the accompanying drawings.

Fig. 1 is a schematic overall structure of a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken at A-A in FIG. 1.

Fig. 3 is a schematic sectional view of the force transmission section T2 in fig. 1.

Fig. 4 is a schematic view of the construction of the liner tube and support member of fig. 3.

Fig. 5 is a schematic sectional view of the guide section T1 in fig. 1.

Fig. 6 is a schematic view of the structure of an elastic tube and a core-releasing wire in the second embodiment of the present invention.

Fig. 7 is a schematic view of the structure of the elastic tube in fig. 6.

Fig. 8 is a schematic structural view of an elastic tube in a third embodiment of the present invention.

Fig. 9 is a schematic view of the structure of an elastic tube and a core-releasing wire in the fourth embodiment of the present invention.

Fig. 10 is a schematic view of the structure of an elastic tube and a core-releasing wire in the fifth embodiment of the present invention.

In the accompanying drawings: the novel automatic feeding device comprises a pushing pipe 1, a core wire releasing pipe 2, a releasing head 3, a spring ring 4, a guide pipe 5, a spring set 6, a control pipe 7, an inner lining pipe 8, an outer lining pipe 9, a supporting member 10, a positioning groove 11, an annular limiting groove 12, an action protrusion 13, a supporting ring 14 and an action groove 15.

It should be noted that the drawings are for illustrating the invention and are not to be construed as limiting the invention. Note that the drawings representing structures may not be drawn to scale. Also, in the drawings, the same or similar elements are denoted by the same or similar reference numerals.

Detailed Description

In order that the invention may be more readily understood, a detailed description of the invention is provided below along with specific embodiments and accompanying figures.

The terms "proximal" and "distal" in the sense of the present invention should be understood as meaning, viewed from the direction of the attending physician, the term "proximal" referring to the end proximal to the attending physician, i.e. corresponding to the "left end" referred to with reference to the accompanying drawings, and the term "distal" referring to the end distal to the attending physician, i.e. corresponding to the "right end" referred to with reference to the accompanying drawings. Similarly, "proximal segment" refers to a segment or a particular region proximal to the attending physician, and "distal segment" refers to a segment or a particular region distal to the attending physician.

Embodiment one: as shown in fig. 1 to 5, the spring coil system of the present embodiment includes a push tube 1, a trip core wire 2, a trip head 3, and a spring coil 4 connected to the trip head 3. The release core wire 2 limits the release head 3 in the pushing tube 1, and the release core wire 2 is pulled out to be separated from the release head 3, so that the release of the spring ring 4 can be realized. The push tube 1 has a hollow cavity inside, and the push tube 1 is an elongated tube, which is aimed at ensuring that the spring coil can reach the target position safely and accurately, while reducing damage to tissue surrounding the blood vessel. Push tube 1 subdivision is three sections, specifically includes direction section T1, force transfer section T2 and controls section T3, direction section T1, force transfer section T2, control section T3 and set up from the distal end to the proximal end in proper order, direction section T1 includes direction pipe 5 and twines at the outside spring group 6 of direction pipe 5, spring group 6 has the development function, when playing the development effect, still avoided the damage to perivascular tissue, control section T3 includes controls pipe 7, force transfer section T2 includes liner tube 8, outer liner tube 9 and the support member 10 of nested between liner tube 8, outer liner tube 9, support member 10's hardness is greater than liner tube 8, support member 10 links to each other direction pipe 5, control pipe 7 and the cross section is the arc for there is the contact area between liner tube 8 and outer liner tube 9. The force transmission section T2 of the present embodiment constructs a structure that can efficiently transmit force while achieving both flexibility and rigidity by integrating the inner liner tube 8, the outer liner tube 9, and the support member 10 therebetween. The support member 10 adopts an arc-shaped cross section, directly connects the guide section 5 and the control section 7, and only partially supports the inner liner tube 8, and realizes perfect balance of flexibility and rigidity while ensuring inherent flexibility of the inner liner tube 8, so that excellent trafficability and good operability of the force transmission section T2 when traversing a complex vascular path are ensured.

The distal end lateral wall of push tube 1 is provided with the constant head tank 11 of intercommunication cavity, constant head tank 11 is located guide tube 5, and trip head 3 is globular and the diameter is greater than the width of constant head tank 11, and trip core wire 2 stretches to the distal end of cavity after passing inside lining pipe 8 from the proximal end of cavity to extrude trip head 3 makes it support into constant head tank 11, and trip head 3 part card is in constant head tank 11 like this, has ensured trip head 3 and constant head tank 11 cooperate in order to be restricted in the cavity to form the spacing to spring coil 4. In the operation process, a doctor delivers the spring ring 4 to the position of the aneurysm through the push tube 1, when the spring ring 4 reaches a preset position, the doctor slowly withdraws the release core wire 2 immediately, so that the release head 3 is separated from the positioning groove 11, release and unfolding of the released spring ring 4 in the aneurysm are realized, a stable embolism structure is formed, blood flow is blocked from entering the aneurysm, rupture risk is reduced, thrombosis is promoted, and finally the purpose of treating the aneurysm is achieved.

The guide tube 5, the support member 10 and the control tube 7 are integrally formed into a tube body structure, so that the tube body structure is convenient to manufacture, the circumference of the tube body structure is provided with a notch, and the tube body structure corresponding to the notch forms the support member 10. The outer lining pipe 9 is sleeved at the supporting member 10 on the pipe body structure so as to cover the incision and the lining pipe 8 exposed above the incision, so that the blood vessel is prevented from being punctured, the two ends of the outer lining pipe 9 extend towards the direction of the guide pipe 5 and the control pipe 7 respectively to form the coverage of partial areas of the guide pipe 5 and the control pipe 7, and the design not only provides stable support for the lining pipe 8 so as to ensure the structural strength of the lining pipe 8 in the use process, but also does not influence the elastic characteristics of the lining pipe 8. The inner liner 8 is adapted to the slit, i.e. the support member 10, i.e. the proximal end of the inner liner 8 is arranged in abutment with the proximal end of the slit, and the distal end of the inner liner 8 is arranged in abutment with the distal end of the slit. The proximal end of the slit is a chamfer, the chamfer is approximately a V-shaped chamfer, the proximal end of the liner tube 8 is straight, and a space is provided between the end face of the proximal end of the liner tube 8 and the proximal end of the chamfer of the slit, so that the proximal end of the liner tube 8 does not at least completely cover the chamfer, thereby further improving the flexibility of the distal end section of the push tube 1. The distal end of the slit is a straight cut surface, and the distal end of the inner liner tube 8 is a straight cylinder and covers the straight cut surface, so as to ensure that the control force to the push tube 1 can be smoothly transmitted to the distal end of the push tube 1. Of course, the proximal end of the liner tube 8 may also be tapered and cover the chamfer so that the reduced diameter section of the liner tube 8 fits exactly into the chamfer.

The inner liner tube 8 is a spring tube having better flexibility to adapt to the complex path and dynamic environment of the blood vessel, generally refers to a type of tubular structure with special shape memory characteristics, and is mainly made of a material with excellent biocompatibility, such as stainless steel, nickel titanium alloy or a material coated with special coating, to adapt to the specific requirements in medical implantation or interventional operation. In any cross section of the lining pipe 8, the overall length of the lining pipe 8 is L, and the length of the lining pipe 8 in contact with the supporting members 10 is L1, so that 1/6.ltoreq.L1/L.ltoreq.1/2 is satisfied, and the supporting of the lining pipe 8 by the corresponding supporting members 10 at the cut is ensured to be local supporting. Here, referring to fig. 2, L is the circumference of the cross section of the liner tube 8, and L1 is the arc length of the liner tube 8 in contact with the support member 10. This ratio ensures that the support member 10 does not excessively nor inadequately support the liner tube 8, precisely maintaining the flexibility of the distal end. In particular, for the present embodiment, L1/L takes a value of 1/6, which aims to achieve minimum intervention in the liner tube 8 and to maximally release its inherent elastic potential, so that the force transmission section T2, i.e. the distal section of the push tube 1, has a higher flexibility, facilitating the shuttling in tortuous vessels. Of course, this ratio is not fixed and can be adjusted to 1/5, 1/4, 1/3 or 1/2 depending on the specific requirements, as long as 1/6.ltoreq.L1/L.ltoreq.1/2 is satisfied. If L1/L is less than 1/6, the support provided by the support member 10 to the liner tube 8 will appear to be inadequate, resulting in excessive distal softness, affecting the stability and accuracy of the surgical procedure. Conversely, if L1/L exceeds 1/2, the force transmission section T2, i.e., the distal end section of the push tube 1, may lose the necessary flexibility due to excessive rigidity, and is also disadvantageous for smooth operation. Thus, careful control of this ratio is critical to ensure that the coil pushing device is flexible enough to accommodate the vascular structure while maintaining operational stability.

Embodiment two: unlike the first embodiment, as shown in fig. 6 and 7, the partial area of the liner tube 8 of this embodiment is recessed inward to form the annular limiting groove 12, and the release core wire 2 is provided with an action protrusion 13 with a size larger than that of the annular limiting groove 12, and the annular limiting groove 12 can be opened when the action protrusion 13 presses the annular limiting groove 12. Like this, action protruding 13 has formed limit structure with annular spacing groove 12, can prevent the maloperation and draw off in advance and break away core silk 2 to a certain extent, just need increase initial effort moreover, just can prop up annular spacing groove 12 through action protruding 13, have not influence to follow-up operation action, do not increase the operation degree of difficulty. The annular limiting groove 12 is approximately formed into a shape with two large ends and a small middle, and correspondingly, the action protrusion 13 is designed into a shape with two small ends and a large middle, for example, the longitudinal section of the action protrusion 13 is elliptical, and the complementation of the two morphologies ensures that the action protrusion 13 can be accurately embedded into and effectively prop open the annular limiting groove 12 in the pressing process so as to pass through the annular limiting groove 12, and meanwhile, the design also ensures that after the necessary force is applied for the first time, the subsequent operation is not hindered, and the smoothness and the high efficiency of the operation process are maintained.

Other structures of this embodiment are identical to those of the embodiment, and are not described herein.

Embodiment III: unlike the second embodiment, as shown in fig. 8, a supporting ring 14 is disposed between the lining pipe 8 and the outer lining pipe 9 in this embodiment, the supporting ring 14 is disposed corresponding to the annular limiting groove 12 to support the annular limiting groove 12, the outer wall of the supporting ring 14 is in a standard cylindrical shape, and the inner wall is designed into a special shape with two large ends and a small middle, so that the structural stability and the molding quality of the annular limiting groove 12 are ensured, and the annular limiting groove 12 is effectively prevented from being deformed unexpectedly too early or too fast due to stress, thereby avoiding the situation that the acting protrusion 13 easily passes through the annular limiting groove 12.

Other structures of this embodiment are the same as those of the second embodiment, and will not be described here again.

Embodiment four: unlike the third embodiment, as shown in fig. 9, the action protrusion 13 of the present embodiment is formed in a shape with both ends large and middle small, the middle of the action protrusion 13 is formed with an action groove 15 coupled with the annular limiting groove 12, the longitudinal section of the action protrusion 13 is concave-shaped to form the annular limiting groove 12, and the annular limiting groove 12 is not supported by the action protrusion 13 when the action groove 15 is coupled with the annular limiting groove 12. That is, when the acting groove 15 is mated with the annular limiting groove 12, the annular limiting groove 12 is restored to an undeployed state, i.e., left intact, because the both ends of the acting protrusion 13 are disposed right on the opposite sides of the annular limiting groove 12. Before the operation, the action protrusion 13 is located in the distal direction of the annular limiting groove 12, and when the releasing wire 2 is operated to release the spring ring 4, the proximal end of the action protrusion 13 applies pressure to the annular limiting groove 12 and then passes through the annular limiting groove 12. At this time, the proximal and distal ends of the action projections 13 are positioned right on both sides of the annular limiting groove 12, forming a fitted state of the action groove 15 and the annular limiting groove 12. However, this is not enough, and it is necessary to let the distal end of the action protrusion 13 also apply pressure to the annular limiting groove 12 and pass through the annular limiting groove 12, so that the operation of releasing the core wire 2 is actually completed.

Thus, this embodiment greatly improves the ability to prevent operational errors by such double-layer engagement of the proximal and distal ends of the action projections 13 with the annular limiting groove 12, ensuring the safety and precise control of the spring ring 4 release process.

Other structures of this embodiment are the same as those of the third embodiment, and will not be described here again. It will be appreciated that the present embodiment can also still maintain the shape of the action protrusion 13 with both small ends and large middle in the third embodiment, and the action groove 15 is provided in the middle of the action protrusion 13, which can achieve similar technical effects. It will be appreciated that the support ring 14 may not be provided in this embodiment.

Fifth embodiment: unlike the third embodiment, as shown in fig. 10, the number of the action protrusions 13 in the present embodiment is two, and an action groove 15 that is matched with the annular limit groove 12 is formed between the two action protrusions 13, and when the action groove 15 is matched with the annular limit groove 12, the annular limit groove 12 is not opened by the action protrusions 13, and the two action protrusions 13 are respectively located at two sides of the annular limit groove 12. That is, when the action groove 15 is mated with the annular limiting groove 12, the annular limiting groove 12 is restored to an unexpanded state because the two action protrusions 13 are skillfully arranged on opposite sides of the annular limiting groove 12.

In the initial state, the two action protrusions 13 are located in the distal end direction of the annular limiting groove 12, in the process of operating the release core wire 2 to release the spring ring 4, the action protrusions 13 contacting the annular limiting groove 12 firstly can press the annular limiting groove 12 and pass through the annular limiting groove 12, and when the process occurs, the two action protrusions 13 are located on two sides of the annular limiting groove 12 exactly, so that the matching state of the action groove 15 and the annular limiting groove 12 is formed. However, this does not mean that the uncoupling is completed, since it is also necessary for the second action projection 13 to subsequently exert pressure on the annular limiting groove 12 and likewise pass through the annular limiting groove 12, which does indeed complete the extraction action of the uncoupling filament 2. Therefore, the double-layer limiting mechanism formed by the two acting protrusions 13 and the annular limiting groove 12 remarkably enhances the capability of preventing misoperation, and ensures high safety and accurate control of the spring ring releasing process. It will be appreciated that the support ring 14 may not be provided in this embodiment. Other structures of this embodiment are the same as those of the third embodiment, and will not be described here again.

It will be appreciated that although the invention has been described above in terms of preferred embodiments, the above embodiments are not intended to limit the invention. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art without departing from the scope of the technology, or the technology can be modified to be equivalent. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. The spring ring system comprises a push pipe (1), a release core wire (2), a release head (3) and a spring ring (4) connected with the release head (3), wherein the release core wire (2) limits the release head (3) in the push pipe (1), the spring ring system is characterized in that the push pipe (1) comprises a guide section, a force transmission section and a control section, the guide section comprises a guide pipe (5) and a spring group (6) wound outside the guide pipe (5), the control section comprises a control pipe (7), the force transmission section comprises an inner liner pipe (8), an outer liner pipe (9) and a supporting member (10) nested between the inner liner pipe (8) and the outer liner pipe (9), the hardness of the supporting member (10) is larger than that of the inner liner pipe (8), the supporting member (10) is used for connecting the guide pipe (5) and the control pipe (7) and the cross section is arc-shaped, so that a contact area exists between the inner liner pipe (8) and the outer liner pipe (9), the total length L of the inner liner pipe (8) is equal to or less than or equal to 1/1 and less than or equal to L/1.

2. The spring ring system according to claim 1, characterized in that the guide tube (5), the support member (10) and the handling tube (7) are integrally formed as a tube structure, the tube structure being provided with cut-outs on its circumference, the tube structure corresponding to the cut-outs forming the support member (10).

3. The spring coil system as claimed in claim 1, characterized in that the outer lining tube (9) extends at both ends in the direction of the guide tube (5) and the handling tube (7), respectively, forming a covering of the partial areas of the guide tube (5) and the handling tube (7).

4. The spring ring system according to claim 1, wherein the inner liner tube (8) is a spring tube, a part of the spring tube is recessed inwards to form an annular limiting groove (12), an action protrusion (13) with a size larger than that of the annular limiting groove (12) is arranged on the release core wire (2), and the annular limiting groove (12) can be opened when the action protrusion (13) extrudes the annular limiting groove (12).

5. The spring ring system according to claim 4, characterized in that a support ring (14) is arranged between the outer liner tube (9) and the inner liner tube (8), the support ring pair (14) being arranged with an annular limiting groove (12) for supporting the annular limiting groove (12).

6. The spring ring system according to claim 4, characterized in that the active projection (13) is formed in a shape with small ends and large middle.

7. The spring ring system according to claim 6, characterized in that the longitudinal section of the active projection (13) is oval.

8. The spring ring system according to claim 6, wherein the two action protrusions (13) are provided, an action groove (15) matched with the annular limiting groove (12) is formed between the two action protrusions (13), and when the action groove (15) is matched with the annular limiting groove (13), the annular limiting groove (13) is not supported by the action protrusions (13), and the two action protrusions (13) are respectively positioned at two sides of the annular limiting groove (12).

9. The spring ring system according to claim 4, wherein the action protrusion (13) is formed in a shape of which both ends are large and the middle is small, and an action groove (15) which is coupled with the annular limit groove (12) is formed in the middle of the action protrusion (13), and the annular limit groove (12) is not spread by the action protrusion (13) when the action groove (15) is coupled with the annular limit groove (12).

10. Spring ring system according to claim 9, characterized in that the longitudinal section of the active protuberance (13) is concave.