CN210056171U

CN210056171U - Puncture device

Info

Publication number: CN210056171U
Application number: CN201822166086.1U
Authority: CN
Inventors: 李安宁; 刘鹏; 邱礼彪
Original assignee: Lifetech Scientific Shenzhen Co Ltd
Current assignee: Shenzhen Advanced Medical Services Co ltd
Priority date: 2018-12-21
Filing date: 2018-12-21
Publication date: 2020-02-14
Anticipated expiration: 2028-12-21

Abstract

The utility model discloses a puncture device, which comprises a puncture component and a bending regulating component, wherein the bending regulating component comprises a hollow catheter body and a traction piece, the catheter body comprises a bending regulating section, the bending regulating section is the distal end part of the catheter body, a plurality of cutting grooves are arranged on the bending regulating section, and at least part of the traction piece is arranged on one side, close to the cutting grooves, of the inner wall of the bending regulating section; the puncture assembly comprises a puncture part and a lead, the puncture part is arranged at the far end of the catheter body, the lead is arranged along the length direction of the catheter, the far end of the lead is connected with the near end of the puncture part, and the near end of the lead is connected with the control mechanism. The utility model provides a puncture device fixes a position inaccurate problem when having solved among the prior art puncture, simultaneously through the structure that changes the puncture subassembly, has avoided a series of operation risks that sharp-pointed puncture needle brought among the prior art. Utilize the utility model discloses a when piercing depth punctured, puncture position was accurate, greatly reduced the risk of thrombosis, still can avoid puncture assembly scratch tissue simultaneously.

Description

Puncture device

Technical Field

The utility model relates to an intervene medical treatment field, concretely relates to piercing depth.

Background

In some medical clinics, such as left atrial appendage occlusion, atrial fibrillation ablation, mitral valve replacement, etc., it is often necessary to deliver medical devices into the left atrium, and access to the left atrium via the blood vessels connected to the left atrium, and because the curving complexity of the blood vessel paths is high, it is almost difficult to deliver the devices to the left atrium via the blood vessels along the blood vessels. Thus, the most common method of accessing the left atrium is to advance medical devices into the right atrium via a venipuncture intervention and into the left atrium via an interatrial puncture.

Conventional interatrial septum puncture needles are comprised of a stainless steel tube with a single curved distal end. The bending degree of the bending structure is fixed and unadjustable, and the positioning of the puncture position by a doctor during puncture is difficult to control, especially the position of the oval fossa is difficult to position. Therefore, when puncturing is performed on other interatrial septum tissues positioned outside the fossa ovalis, the tissues at the position of the interatrial septum are thicker, the puncturing process is more difficult, and a larger pushing force is needed to puncture into the left atrium, which most possibly causes the puncturing needle to puncture the left atrium wall, so that the pericardium is stuffed or the aorta, serious complications and other harm to the patient are caused, or the interatrial septum tissues are thicker, so that the interatrial septum cannot penetrate through the interatrial septum, and the operation is terminated. In addition, the tip of the traditional puncture needle is easy to scratch the inner wall of the sheath tube to generate fragments or scratch the inner wall of tissues in the conveying process, so that thrombus is caused, and the harm is brought to patients.

SUMMERY OF THE UTILITY MODEL

The utility model provides a puncture device, which comprises a puncture mechanism and a control mechanism, wherein the control mechanism is arranged at the near end of the puncture mechanism and is used for controlling the puncture mechanism to puncture; the bending adjusting assembly comprises a hollow catheter body and a traction piece, the catheter body comprises a bending adjusting section, the bending adjusting section is the distal end portion of the catheter body, a plurality of cutting grooves are formed in the bending adjusting section, the cutting grooves are communicated with the inner cavity of the catheter body, the traction piece is at least partially arranged on one side, close to the cutting grooves, of the inner wall of the bending adjusting section, and the proximal end of the traction piece is connected with the control mechanism; the puncture assembly comprises a puncture part and a lead, the puncture part is arranged at the far end of the catheter body, the lead is arranged along the length direction of the catheter, the far end of the lead is connected with the near end of the puncture part, and the near end of the lead is connected with the control mechanism.

In one embodiment, the plurality of cuts are arranged from dense to sparse or uniformly arranged from the distal end to the proximal end.

In one embodiment, the pulling member passes through one of the plurality of cutting slots closest to the distal end of the bend adjustment section and/or one of the plurality of cutting slots closest to the proximal end of the bend adjustment section.

In one embodiment, the bend-adjusting section is provided with a first through hole between the distal-most cutting slot and the distal end of the catheter body, and the distal end of the pulling member passes through the first through hole.

In one embodiment, the proximal end of the catheter body cavity close to the bend adjusting section is further provided with a fixing part, and the fixing part connects the traction piece with the proximal end of the bend adjusting section.

In one embodiment, the fixing part is a hollow tube, the fixing part is connected with the catheter body, and the fixing part is provided with a small hole through which the traction piece passes.

In one embodiment, a thin tube is arranged on one side of the inner wall of the catheter body, which is close to the cutting groove, and the distal end of the traction piece penetrates through the interior of the thin tube and then is connected with the puncture part.

In one embodiment, the slot is parallel to the circumference of the catheter body or the slot is at an acute angle to the circumference of the catheter body.

In one embodiment, the pulling member is the wire.

In one embodiment, the bend-adjusting section is provided with a thin film body, and the thin film body is provided with an opening which is communicated with the inside of the catheter body.

The utility model provides a puncture device, including transferring the curved subassembly, set the structure of transferring the curved with catheter body distal end to the inaccurate problem in location when solving among the prior art puncture, through the structure that changes puncture subassembly, a series of operation risks that sharp-pointed pjncture needle brought have been avoided among the prior art simultaneously. Utilize the utility model discloses a when piercing depth punctured, puncture position was accurate, greatly reduced the risk of thrombosis, still can avoid puncture assembly scratch tissue simultaneously.

Drawings

Fig. 1 is a schematic view of an overall structure of a puncture device according to a first embodiment of the present invention, including a puncture portion and a bending section;

FIG. 2 is a schematic view of the curved puncture device shown in FIG. 1;

FIG. 3 is a schematic view of the puncturing part of the puncturing device shown in FIG. 1;

FIG. 4 is a schematic view of a bending section of the puncturing device shown in FIG. 1;

fig. 5 is a schematic structural view of a bending section of the puncturing device according to another embodiment of the present invention;

FIG. 6 is a schematic view of the configuration of the distal portion of the puncturing device shown in FIG. 1;

FIG. 7 is a schematic view of the configuration of the distal portion of the puncturing device shown in FIG. 1;

fig. 8 is a schematic structural view of a distal end portion of a puncture device according to a second embodiment of the present invention;

fig. 9 is a schematic view of a distal end portion of a puncture device according to a third embodiment of the present invention, including a fixing portion;

FIG. 10 is a cross-sectional view of the lancing device of FIG. 9 with the anchor portion positioned therein;

fig. 11 is a schematic structural view of a distal end portion of a puncture device according to a fourth embodiment of the present invention;

Detailed Description

For better understanding of the technical solutions and advantages of the present invention, the following description is made in conjunction with the accompanying drawings for illustrating the present invention, and the following detailed description is only a part of the preferred embodiments of the present invention, which is not a limitation of the present invention.

In the field of interventional medicine, the end closer to the operator is defined as "proximal" and the end further from the operator as "distal".

The utility model discloses a puncture device mainly includes puncture mechanism and control mechanism. The puncture mechanism comprises a bending adjusting section, and the bending adjusting section can be bent at a certain angle according to requirements. The control mechanism is used for controlling the puncture mechanism to bend and puncture the puncture mechanism. In addition, a wire in the puncture mechanism can be connected with an external radio frequency power supply through a control mechanism, so that the puncture part in the puncture mechanism is electrified and forms a loop with a negative plate outside the body, the puncture part obtains high-temperature energy, and then tissue puncture is realized by utilizing high heat.

Example one

As shown in FIG. 1, the puncturing device 100 of the present embodiment comprises a puncturing mechanism 10 and a control mechanism 20, wherein the control mechanism 20 is disposed at a proximal end of the puncturing mechanism 10 for an operator to hold and control the puncturing mechanism 10 to perform bending and puncturing, the puncturing mechanism 10 comprises a puncturing assembly (not numbered) for puncturing tissue and a bending adjustment assembly (not numbered) for bending a distal end portion of the puncturing device 100 to accurately position a puncturing position, FIG. 2 shows a bending adjustment structure of the distal end portion of the puncturing device 100, wherein the bending adjustment angle α is 0-90 degrees, and the catheter body 13 is made of a metal material such as a nickel titanium tube.

Specifically, referring to both fig. 1 and 6, the bend adjustment assembly includes a hollow catheter body 13 and a pull member 15. The distal end of the catheter body 13 is a bend adjusting section 12. The bend adjusting section 12 is provided with a plurality of cutting grooves 14. As shown in FIG. 1, the plurality of cutting grooves 14 are communicated with the inner cavity of the catheter body 13, and the plurality of cutting grooves 14 are arranged from close to open from the far end to the near end, namely from the far end to the near end, and sequentially define the distance between two connected cutting grooves 14 as D1 and D2 … … Dn, wherein D1 < D2 < … … < Dn. The denser the cutting grooves 14 are, the higher the flexibility is, the easier the bending is; the more sparse the cutting grooves 14 are, the better the support performance is. Therefore, the cutting grooves 14 are arranged from close to loose from the far end to the near end on the catheter body 13, so that the far end part of the bending adjusting section 12 can be flexibly bent, the puncture position is more accurately positioned, the position easy to puncture can be positioned, and the supporting performance and the force transmission performance during pushing the near end of the bending adjusting section 12 are ensured. In order to ensure that the peripheral tissues are not damaged after the bending of the bending adjusting section 12, the length range of the bending adjusting section 12 can be 10-50 mm, and preferably 20-30 mm.

It will be appreciated that in other embodiments, where the positioning accuracy of the puncture location is less critical, such as during puncture at other parts of the atrial septum, the notches of the turning section may also be arranged uniformly, i.e. with equal distances between the notches.

In this embodiment, each slit 14 is parallel to the circumferential direction of the catheter body 13, i.e., after the catheter body 13 is expanded in the axial direction, the longitudinal extension direction of the slit 14 is parallel to the circumferential line of the catheter body 13. It will be appreciated that in other embodiments, the slot 14a of the bend-adjusting section 12a may be shaped as shown in fig. 5, wherein a plurality of slots 14a are spirally distributed around the central axis of the catheter body, and the slots 14a are at an acute angle with respect to the circumferential direction of the catheter body, i.e. the angle between the longitudinal extension direction of the slots 14a and the circumferential line of the catheter body is acute after the catheter body is axially deployed. The catheter with the shape of the cutting groove has better continuity and better elasticity because of the whole body in the length direction, and is more beneficial to bending.

The puncture set includes a puncture portion 11 and a lead wire (not shown). The puncture section 11 is provided at the distal end of the catheter body 13. The conducting wire can conduct electricity, the far end of the conducting wire is connected with the puncture part 11, the near end of the conducting wire is connected with the control mechanism 20, and the conducting wire can be connected with an external radio frequency power supply through the control mechanism 20. It is understood that the wire may be disposed within the catheter, outside the catheter, or partially within and partially outside the catheter.

The puncturing part 11 of the present embodiment is constructed as shown in fig. 3, the puncturing part 11 includes a partial sphere 112 and a hollow cylinder 111, a proximal plane of the partial sphere 112 is connected to a distal end of the cylinder 111, and a diameter of the proximal plane of the partial sphere 112 is larger than an outer diameter of the cylinder 111. The cylinder 111 can be housed within the lumen of the distal end portion of the catheter body 13 and cannot fall out of the lumen of the catheter body 13. The proximal plane of the partial sphere 112 abuts the distal end surface of the catheter body 13, so that a smooth transition is formed between the outer surface of the catheter body 13 and the distal spherical surface of the partial sphere 112. Thereby preventing the tissue from being scratched by the distal end of the puncturing part 11 or between the puncturing part 11 and the catheter body 13. The cylinder 111 has a lumen 113, and the distal end of the lead can extend into the lumen 113 and be fixed to the inner wall of the cylinder 111 by welding. It should be understood that the piercing portion 11 and the wire are made of electrically conductive materials, which may be the same or different.

FIG. 6 shows a cross-sectional configuration of the distal portion of the lancing device 100, and for ease of reading, other features, such as a guidewire, are omitted from the view that are also located on the distal portion of the catheter body. Two first through holes 18 are arranged on the bending adjusting section 12. The first through hole 18 is provided between the distal end surface of the catheter body 13 and the most distal incision 14. The utility model discloses do not restrict two first through-holes 18's relative position, as long as the two all be in the pipe body 13 the distal end terminal surface with be located between the grooving 14 of most distal end can, preferably two first through-holes 18 circumference intervals set up. The pulling member 15 has a linear structure and a distal end portion after being folded in half, i.e., the pulling member 15 is folded in two from a strand. And, the distal end portion of the pulling member 15 passes through the two first through holes 18. I.e. the distal part of the pulling member 15 wraps around part of the wall of the catheter body 13 between the two first through holes 18, one strand of the pulling member 15 passes through one of the two first through holes 18 and the other strand passes through the other first through hole 18, i.e. the distal part of the pulling member 15 is located outside the catheter body 13 and the rest is located inside the catheter body 13. The portion of the inner cavity of the catheter body 13 near the proximal end of the bending adjustment section 12 is further provided with a fixing portion, the fixing portion enables the traction piece 15 to be connected with the proximal end of the bending adjustment section 12, so that when the distal end of the catheter body 13 is bent through the control mechanism 20, the traction piece 15 cannot deflect, the fixing portion limits force to be concentrated on one side where the cutting groove is located, and the bending adjustment section 12 is bent towards the side where the cutting groove is located. In this embodiment, the fixing portions are two second through holes 19, and the second through holes 19 are located near the proximal ends of the most proximal slots 14. And the relative positional relationship of the second through holes 19 is not limited as the relative positional relationship of the first through holes, it is preferable that two second through holes 19 are axially spaced in this embodiment. Both of the pulling members 15 pass through one of the second through holes 19 closer to the distal end, pass through the other second through hole 19 after bypassing the outer wall of the catheter body 13, and are connected to the control mechanism 20.

It will be appreciated that in other embodiments, the two first through holes and the two second through holes may be two slots located at the distal end and two slots located at the proximal end of the bending section, respectively, and the pulling member may be passed through the four slots in the above-described manner.

As shown in fig. 7, in order to facilitate the observation of whether the puncture is successful or not by injecting the contrast medium after the puncture operation, the curved section 12 of the puncture device 100 of the present embodiment is further provided with a thin film body 30 on the outer periphery. The thin film body 30 covers the bending section 12, and the thin film body 30 is further provided with an opening at the distal end thereof, which is located opposite to the notch 14 or the first through hole 18, so that the contrast agent injected from the proximal end of the puncture device 100 into the catheter body 13 can flow out through the opening of the thin film body 30. It will be appreciated that in other embodiments, where the success of the puncture is directly observed by the imaging device, the periphery of the bend may also be free of the membrane body, since the injection of contrast fluid is no longer required.

The utility model discloses a piercing depth can puncture the tissue with external radio frequency power switch-on back. Specifically, after the distal end part of the puncture device reaches the vicinity of the target puncture position, the traction piece is moved towards the proximal end by operating the control mechanism, so that the distal end part of the bending adjusting section is driven to bend towards one side where the cutting groove is positioned; when the puncture part at the far end of the catheter body reaches a target puncture position, the puncture part is enabled to be abutted against the surface of the tissue, the bending form of the bending section is kept, the external radio frequency power supply is connected through the control structure, the energy is transmitted to the puncture part through the lead, and the puncture part utilizes high heat to gasify the surrounding tissue to realize puncture. In order to ensure successful puncture, contrast fluid can be injected into the catheter body through the proximal end of the puncture device, and whether the puncture is successful or not can be observed through urban and rural equipment.

The utility model discloses do not describe in detail about how control mechanism controls the mode that pulls the piece and make it move towards the near-end, if drive the piece that pulls through rotating the knob, as long as can guarantee to make through operation control structure pull the piece towards the near-end removal can.

Therefore, utilize the utility model discloses a when piercing depth punctured, because of set up the accent curved mechanism, can carry out the accent of different angles to piercing depth's distal end and bend for before the puncture fix a position more accurate greatly reduced thrombus formation's risk, still can avoid puncture assembly scratch tissue simultaneously.

Example two

The puncture device of the present embodiment has substantially the same structure as the puncture device 100 of the first embodiment, and differs only in the arrangement of the pulling member 25. In this embodiment, a thin tube 27 is also disposed in the lumen of the catheter body, as shown in fig. 8. The thin tube 27 is made of soft material, and is specifically arranged on one side of the catheter body close to the cutting groove 24, and the length of the thin tube is equivalent to that of the bending adjusting section 22. The distal end of the pulling member 25 is connected to the puncturing part 21 after passing through the lumen of the tubule 27. The traction piece of the embodiment is integrally positioned in the catheter body, no bending section exists, and the reliability and the stability are higher when the bending adjusting operation is carried out.

The operation of the puncturing device of this embodiment is the same as the puncturing device 100 of the first embodiment, and will not be described herein again.

EXAMPLE III

The puncturing device of the present embodiment has a structure substantially the same as that of the puncturing device 100 of the first embodiment, and the distal end of the pulling member 35 is disposed in the same manner as in the first embodiment, except for the structure of the fixing portion and the proximal end of the pulling member 35. As shown in fig. 9 and 10, in the present embodiment, the fixing portion 39 is a section of hollow tube material near the proximal end of the bending adjustment section 32. The fixing portion 39 is connected with the catheter body, and the fixing portion 39 can be fixed relative to the catheter body in a welding or interference fit mode, so that the fixing portion 39 is not loosened, and the reliability of bending operation is further guaranteed. The fixing portion 39 has an inner cavity 392 for passing a wire or a liquid. The fixing portion 39 is further provided with a small hole 391 axially penetrating the fixing portion 39 on the side close to the inner wall of the catheter body, and the small hole 291 and the cutting groove 34 are located on the same side of the catheter body. The pulling member 35 passes through the aperture 391. In this embodiment, the aperture 391 is the space between an axially recessed surface on the outer surface of the anchor portion 39 and the inner wall of the catheter body. It will be appreciated that in other embodiments the aperture may be an axial through hole opening in the wall of the anchor portion. It will also be appreciated that in other embodiments, the small hole is formed by the inner wall of the catheter body, i.e., the portion of the catheter body near the proximal end of the deflectable segment is a double lumen construction. When the material of the bending adjusting section is different from the rest part of the catheter body, the fixing part of the embodiment can also play a role in connecting the bending adjusting section and the rest part of the catheter body.

Example four

The puncture device of the present embodiment has substantially the same structure as the puncture device 100 of the first embodiment, and differs only in the structure of the bend adjusting section 42. In the present embodiment, as shown in fig. 11, the bending adjustment section 42 is a metal slice with an arc-shaped cross section, and the distal end has a rounded arc-shaped structure. The distal end of the bend-adjusting section 42 is further provided with two first through holes 48 for the distal end of a pulling member (not shown) to pass through. In this embodiment, the distal end of the bending adjusting section 42 is the puncturing part, which greatly simplifies the structure of the puncturing device and facilitates the processing.

It can be understood that if the utility model discloses a when puncture portion, accent curved section and pull the piece and all adopt the metal material that can electrically conduct to make, can omit the wire, pull the effect that the piece can play the wire simultaneously. In this case, if a part of the pulling member is located on the outer wall of the catheter body, insulation treatment should be performed even if injection of a contrast medium is not required.

It is understood that the foregoing detailed description is only a partial preferred embodiment, and not intended to limit the present invention, and that those skilled in the art can easily replace part of the structure according to actual requirements, and that insubstantial changes in the structure without departing from the spirit of the present invention are covered by the following claims.

Claims

1. A puncture device comprises a puncture mechanism and a control mechanism, wherein the control mechanism is arranged at the near end of the puncture mechanism and is used for controlling the puncture mechanism to puncture; the bending adjusting assembly comprises a hollow catheter body and a traction piece, the catheter body comprises a bending adjusting section, the bending adjusting section is the distal end portion of the catheter body, a plurality of cutting grooves are formed in the bending adjusting section, the cutting grooves are communicated with the inner cavity of the catheter body, the traction piece is at least partially arranged on one side, close to the cutting grooves, of the inner wall of the bending adjusting section, and the proximal end of the traction piece is connected with the control mechanism; the puncture assembly comprises a puncture part and a lead, the puncture part is arranged at the far end of the catheter body, the lead is arranged along the length direction of the catheter, the far end of the lead is connected with the near end of the puncture part, and the near end of the lead is connected with the control mechanism.

2. The lancing device of claim 1, wherein the plurality of cutaways are arranged from dense to sparse or uniformly arranged from the distal end to the proximal end.

3. The lancing device of claim 1, wherein the pull member passes through a slot of the plurality of slots that is closest to the distal end of the bend adjustment section and/or a slot of the plurality of slots that is closest to the proximal end of the bend adjustment section.

4. The lancing device of claim 1, wherein the bend section defines a first throughbore between the distal-most notch and the distal end of the catheter body, and the distal portion of the retractor extends through the first throughbore.

5. The puncture device according to claim 4, wherein the catheter body lumen is further provided with a fixing portion near the proximal end of the bending adjustment section, and the fixing portion connects the traction member with the proximal end of the bending adjustment section.

6. The lancing device of claim 5, wherein the anchor portion is a hollow tube, the anchor portion is attached to the catheter body, and the anchor portion has an aperture through which the retractor extends.

7. The puncture device according to claim 1, wherein a thin tube is provided on a side of the inner wall of the catheter body adjacent to the incision, and a distal end of the traction member is connected to the puncture portion after passing through the interior of the thin tube.

8. The lancing device of any one of claims 1 to 7, wherein the notch is parallel to the catheter body circumference or the notch is at an acute angle to the catheter body circumference.

9. The lancing device of any one of claims 1 to 7, wherein the pull member is the lead.

10. The lancing device of any one of claims 1 to 7, wherein the bend adjustment section is provided with a membrane body provided with an opening communicating with the interior of the catheter body.