CN110916768A

CN110916768A - High-efficient spiral shell rotary-cut bolt device

Info

Publication number: CN110916768A
Application number: CN201911200977.7A
Authority: CN
Inventors: 宋浩; 祝缓缓; 杨青林; 王泱; 朱幼宁
Original assignee: Kunshan Jintai Medical Technology Co Ltd
Current assignee: Kunshan Jintai Medical Technology Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-03-27

Abstract

The invention discloses a high-efficiency spiral-cut bolt device, which comprises: a guide catheter; a spiral cutting feed knife disposed inside the guide catheter; and the metal bolt cutting window is arranged on the outer surface of the guide catheter. The rotary cutting device of the device is simple and easy to operate; the metal thrombus cutting windows are arranged to cut thrombus at the same time; the shearing force of the catheter and the rotary cutting and conveying knife is used for cutting the thrombus, so that the inner wall of the blood vessel can be protected from being damaged. The thrombus suction efficiency is high, and the patency rate is high.

Description

High-efficient spiral shell rotary-cut bolt device

FIELD

The invention relates to the technical field of medical instruments, in particular to a high-efficiency spiral-cut bolt device.

Background

Thromboembolism can occur at any age and is a serious life-threatening health. One in every four deaths worldwide is associated with thrombosis. Embolisms are classified into arterial and venous thrombi. The arterial thrombus is mainly cardiovascular and cerebrovascular diseases and peripheral vascular diseases; venous thrombosis is primarily Venous Thromboembolism (VTE), including Deep Vein Thrombosis (DVT) and Pulmonary Embolism (PE). The treatment of peripheral vascular thrombotic disease has progressed from surgical procedures to intravascular interventions, with mechanical thrombectomy becoming an important treatment. The guidelines for antithrombotic treatment and prevention of thrombosis (ACCP-9) promulgated by the american academy of thoracic physicians (ACCP) and the guidelines for diagnosis and treatment of deep vein thrombosis (third edition) promulgated by the society of surgery, angiosurgery (CSC), of the chinese medical society, mention that mechanical thrombectomy can be used to remove thrombi and prevent complications. But the thrombectomy efficiency of the current mechanical thrombus intervention and removal is not high, the operation time is prolonged, and the intervention consumable structure is complex, so that the efficient thrombus removal is a huge challenge of the current intervention thrombus removal.

SUMMARY

The present disclosure relates to a high-efficient spiral shell rotary-cut bolt device, it includes:

a guide catheter;

a spiral cutting feed knife disposed inside the guide catheter; and

and the metal cutting bolt window is arranged on the outer surface of the guide catheter.

Brief description of the drawings

Figure 1 illustrates a block diagram view of a high efficiency helical bolt device according to certain embodiments of the present disclosure.

Detailed description of the invention

In the following description, certain specific details are included to provide a thorough understanding of various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth.

Unless otherwise required by the disclosure, throughout the specification and the appended claims, the words "comprise", "comprising", and "have" are to be construed in an open, inclusive sense, i.e., "including but not limited to".

Reference throughout the specification to "one embodiment," "an embodiment," "in another embodiment," or "in certain embodiments" means that a particular reference element, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" or "in another embodiment" or "in certain embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment, and furthermore, particular elements, structures, or features may be combined in any suitable manner in one or more embodiments.

Definition of

In the present disclosure, the term "guide catheter" is a medical interventional device that achieves directional thrombus cutting by moving the guide catheter.

In the present disclosure, the term "helical cutting transport blade" has a helical shape, enabling thrombus cutting and transport of the cut thrombus.

In the present disclosure, the term "metal thrombectomy window" is used for the aspiration of thrombi.

In the present disclosure, the term "stainless steel" is short for stainless acid-resistant steel, and steel grade resistant to weak corrosive media such as air, steam, water, etc. or having stainless property is referred to as stainless steel; steel grades that are resistant to corrosion by chemically aggressive media (chemical attacks such as acids, bases, salts, etc.) are called acid-resistant steels.

In the present disclosure, the term "316L stainless steel" is a molybdenum-containing stainless steel grade that has superior corrosion resistance, heat resistance, and mechanical properties.

In the present disclosure, in the term "nylon woven composite material", the term "nylon" also referred to as "polyamide fiber (cotton)" is a generic term for a thermoplastic resin having a repeating amide group in a molecular main chain. The term "nylon woven composite" is a regular close packing of fabrics, influenced by the woven structure of the composite, such that the nylon is present in the composite in a higher volume content.

Detailed Description

a guide catheter;

a spiral cutting feed knife disposed inside the guide catheter; and

In certain embodiments, the guide catheter is cylindrical.

In certain embodiments, the guide catheter is 1 to 5mm in diameter.

In certain embodiments, the guide catheter is 2 to 2.8mm in diameter.

In certain embodiments, the guide catheter has a working length of 50 to 200 cm.

In certain embodiments, the guide catheter has a working length of 90 to 120cm

In certain embodiments, the guiding catheter has a conical shape at one end.

In certain embodiments, the guide catheter is hollow.

In certain embodiments, the spiral cutting conveyor has a conveying surface and a blade.

In certain embodiments, the blades continue to fragment and expel the incoming clot/thrombus along the transport surface under operating conditions.

In certain embodiments, the conveying surface extends in a radial direction helically along its longitudinal axis.

In certain embodiments, the axis of the helical cutting blade coincides with the axis of the guiding catheter.

In certain embodiments, the helical cutting transport knife has a diameter less than the diameter of the guiding catheter.

Wherein, the thrombus is cut by the shearing force of the guide catheter and the spiral cutting conveying knife, so that the inner wall of the blood vessel can be protected from being damaged.

In certain embodiments, the metal bolt-cutting window is cylindrical.

In certain embodiments, the metal cutting plug window diameter is greater than the guiding catheter diameter.

In certain embodiments, the metal shear-pin window is hollow.

In certain embodiments, the metal peg cutting windows are equally spaced on the outer surface of the guiding catheter.

In certain embodiments, the equidistant distance is from 10 to 20 mm.

In certain embodiments, the catheter is empty at the metal embolectomy window.

In certain embodiments, the metal bolt cutting window is provided with at least one bolt removal hole.

In certain embodiments, the metal tapping window has 2 to 3 tapping holes.

Wherein, with at least one tap hole, the size of the single tap hole is sufficient to smoothly suck in the thrombus, but considering the robustness of the tap head, it is preferable to have 2 to 3 tap holes.

In certain embodiments, the peg holes are circular, oval, rectangular, or triangular.

In certain embodiments, the peg hole is circular.

In certain embodiments, the draw pin hole is 1 to 1.5mm in diameter.

Wherein the diameter of the embolectomy hole is not particularly limited, but if the embolectomy hole is too large, the firmness of the embolectomy head is affected, and the ability to guide the catheter through the curved vessel is deteriorated; if the diameter of the bolt taking hole is too small, the thrombus with larger size is difficult to enter the metal bolt cutting window, and the functions of crushing and sucking the bolt cannot be better realized.

In certain embodiments, the plug holes are symmetrically distributed on the outer surface of the metal bolt cutting window.

Wherein, the bolt taking holes are uniformly distributed, so that the thrombus can enter the metal bolt cutting window, and the thrombus can be better cut; meanwhile, the stress of the conduit can be ensured to be uniform under the working state.

In certain embodiments, the spiral cutting blade is 316L stainless steel.

In certain embodiments, the metal shear pin window is made of stainless steel.

In some embodiments, the catheter material is a nylon braided composite material.

Example 1

As shown in fig. 1, a structure of a high-efficiency spiral cutting bolt device includes: a guide catheter 1, a spiral cutting conveying knife 2 and a metal bolt cutting window 3.

A spiral cutting conveying knife 2 arranged at the inner side of the guide catheter 1, and a metal bolt cutting window 3 arranged at the outer surface of the guide catheter 1.

In the rotary cutting process, when the guide catheter 1 is guided by the guide wire to puncture and deliver the spiral cutting device into a target lesion blood vessel, the guide catheter 1 extrudes thrombus plaques, thrombus can be extruded to the metal thrombus cutting windows 3, the guide catheter 1 is provided with a plurality of metal thrombus cutting windows 3, the thrombus plaques extruded to the metal thrombus cutting windows 3 are cut by the shearing action of the catheter wall of the guide catheter 1 and the spiral cutting delivery knife 2, and the cut thrombus rotates to the outside of the body along with the spiral cutting delivery knife 2 after rotary cutting.

In conclusion, the high-efficiency spiral-cut thrombus device provided by the invention can absorb fresh and old thrombus in a blood vessel cavity, so that cut scraps are conveyed out of the body along the spiral-cut conveying cutter, and the blockage of a distal tiny blood vessel is avoided. Compared with catheter thrombolysis, the method is more convenient, safer and more effective; the operation wound is small, the postoperative recovery is fast, the bleeding is less, the unobstructed rate is high, and in the process of thrombus excision, the thrombus enters the catheter through the metal thrombus cutting window by the extrusion of the catheter, the blood vessel wall can not be injured, and the injury to the blood vessel at the pathological change position can be avoided; bolt window is cut through designing a plurality of metals, can cut the bolt with high efficiency.

From the foregoing it will be appreciated that, although specific embodiments of the disclosure have been described herein for purposes of illustration, various modifications or improvements may be made by those skilled in the art without departing from the spirit and scope of the disclosure, and that such modifications or improvements are intended to be within the scope of the appended claims.

Claims

1. A high efficiency helical rotary bolt device comprising:

a guide catheter;

a spiral cutting feed knife disposed inside the guide catheter; and

2. A high efficiency helical atherectomy device according to claim 1, wherein the guide catheter is cylindrical, and the guide catheter has a diameter of 1 to 5mm, preferably 2 to 2.8 mm; the guide catheter has a working length of 50 to 200cm, preferably 90 to 120 cm; one end of the guide catheter is conical, and preferably, the guide catheter is hollow.

3. A high efficiency spiral atherectomy device according to claim 1 or 2, wherein the spiral cutting blade has a cutting surface and a cutting blade, the cutting surface extending helically in a radial direction along its longitudinal axis, preferably wherein the axis of the spiral cutting blade coincides with the axis of the guiding catheter, and more preferably wherein the diameter of the spiral cutting blade is smaller than the diameter of the guiding catheter.

4. A high efficiency corkscrew device according to anyone of the claims 1 to 3, wherein said metal cutting plug window is cylindrical, preferably said metal cutting plug window has a larger diameter than said guiding catheter, more preferably said metal cutting plug window is hollow; preferably, the metal cutting windows are arranged on the outer surface of the guiding catheter at equal intervals, more preferably at equal intervals of 10 to 20 mm.

5. A high efficiency atherectomy device according to claim 4, wherein the catheter at the metal cutting window is hollow.

6. A high efficiency rotational atherectomy device according to claim 4 or 5, wherein the metal bolt cutting window has at least one bolt hole, preferably 2 to 3 bolt holes.

7. A high efficiency rotational atherectomy device according to any of claims 4 to 6, wherein the tap hole is circular, oval, rectangular or triangular, preferably circular, more preferably the tap hole has a diameter of 1 to 1.5 mm; preferably, the bolt taking holes are symmetrically distributed on the outer surface of the metal bolt cutting window.

8. A high efficiency helical spline device as claimed in any one of claims 1 to 7, wherein: the material of the spiral cutting conveying cutter is 316L stainless steel, the material of the metal cutting bolt window is stainless steel, and the material of the conduit is nylon woven composite material.