CN113662704B

CN113662704B - Vena cava filter catcher

Info

Publication number: CN113662704B
Application number: CN202111237757.9A
Authority: CN
Inventors: 付学森; 孙丽娜; 付钰锟; 温良飞
Original assignee: Shenzhen Maipuqi Medical Technology Co ltd
Current assignee: Shenzhen Maipuqi Medical Technology Co ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2022-02-15
Anticipated expiration: 2041-10-25
Also published as: CN113662704A

Abstract

The invention relates to the technical field of medical instruments and discloses a vena cava filter catcher, which comprises a recovery pipe, wherein a connecting pipe is sleeved inside the recovery pipe; according to the invention, the limiting mechanism is arranged in the connecting pipe, the limiting block is limited by the limiting mechanism, so that after the hook of the pulse filter is sleeved by the snare, the hook of the pulse filter can be locked at the bottom end of the connecting pipe, the hook of the pulse filter is locked, the situation that the hook of the pulse filter is separated from the snare due to looseness of medical staff during pulling can be avoided, the medical staff needs to operate the hook of the pulse filter for the second time, the operation time of a patient is shortened, the injury to the vein of the patient is reduced, the hook of the pulse filter is tightened, the operation of the hook of the pulse filter can be reduced, the medical staff does not need to operate the recovery pipe and the snare connecting rod by distraction, the operation difficulty is reduced, the use is simpler, more convenient and faster, and the practicability is extremely high.

Description

Vena cava filter catcher

Technical Field

The invention relates to the technical field of medical instruments, in particular to a vena cava filter catcher.

Background

The vena cava filter is a medical filter. Pulmonary artery embolism is an acute disease with high clinical morbidity and mortality, the number of symptomatic pulmonary artery embolism cases in the United states is 57-63 ten thousand each year, 20 ten thousand of the cases cause death, 3-20% of the cases still have secondary pulmonary artery embolism although systemic anticoagulation treatment can achieve some curative effect, and the anticoagulation treatment has 26% of complications, wherein 5-12% of the complications are fatal complications; some patients are unable to receive anticoagulant therapy, such as acute bleeding, peptic ulcers, primary or metastatic tumors (especially intracranial tumors), pregnancy, pre-surgical treatment, and the like.

Clinically, the risk of pulmonary embolism after filter implantation in a patient is reduced or eliminated with treatment, and medical personnel are required to use a pulse filter catcher to remove the pulse filter from the patient's vein.

However, when the capturing device of the pulse filter is used at present, after medical staff send the pulse filter into the body of a patient, the medical staff use the snare to loop the hook of the pulse filter and then pull the hook, because the grabber can not lock the hook of the grabbed pulse filter, when the medical staff operates, the need to control both the vena filter recovery tube and the snare connection rod, while operating both structures simultaneously undoubtedly increases the difficulty of vena filter recovery, and when medical staff pulls the trapper, the connecting rod of the snare cannot be loosened, once the connecting rod is loosened, the snare of the trapper and the hook of the pulse filter fall off, thereby causing the medical staff to carry out secondary nesting on the hook of the pulse filter, prolonging the operation time, but also increases the damage to the patient's vein, and for this reason a vena cava filter trap has been proposed to address this problem.

Disclosure of Invention

The invention aims to provide a vena cava filter catcher, which has the advantage of locking a vein filter hook and solves the problem that the vein filter hook cannot be locked when the existing vena cava filter catcher is used.

In order to achieve the purpose, the invention provides the following technical scheme: the vena cava filter catcher comprises a recovery tube, wherein a connecting tube is sleeved inside the recovery tube, a snare connecting rod is sleeved inside the connecting tube, the bottom of the snare connecting rod is bolted with a snare, the surface of the snare connecting rod is sleeved with two limiting mechanisms, the surface of the snare connecting rod is fixedly sleeved with a limiting block, the limiting mechanism comprises two limiting arc blocks, the surface of the limiting arc-shaped block is bolted with a connecting rod, one side of the connecting rod is bolted with a rotating block, one side of the rotating block is bolted with the inner wall of the connecting pipe, two grooves are respectively arranged inside the connecting pipe, the inner part of the groove is sleeved with the surface of the connecting rod, one side of the limiting arc-shaped block is bolted with a spring through a spring fixing piece, one end of the spring, which is far away from the limiting arc-shaped block, is bolted with the inside of the connecting pipe through a spring fixing piece.

Preferably, a limiting rod is arranged inside the groove, and one side of the limiting rod is bolted with the inside of the connecting pipe.

Preferably, one side of the limiting rod, which is close to the connecting rod, is in contact with the connecting rod.

Preferably, the surface of the snare is chamfered.

Preferably, the inner diameter of the bottom end of the connecting pipe is the same as the width of the pulse filter hook.

Preferably, the length between the limiting mechanism and the limiting block is the same as the straightening length of the snare.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention discloses a pulse filter, which is characterized in that a limiting mechanism is arranged in a connecting pipe, the limiting mechanism is utilized to limit a limiting block, after a hook of the pulse filter is sleeved by a snare, the snare connecting rod can be pulled to drive the limiting block to be clamped with the limiting mechanism, so that the snare can lock the hook of the pulse filter at the bottom end of the connecting pipe, the purpose of locking the hook of the pulse filter is realized, the hook of the pulse filter can be locked, the situation that the hook of the pulse filter and the snare are separated due to looseness when a medical worker pulls the pulse filter can be avoided, the medical worker can be prevented from operating the hook of the pulse filter for the second time, the operation time of a patient is shortened, the injury to the vein of the patient is reduced, the hook of the pulse filter can be tightened by the catcher, the operation of the medical worker on the hook of the pulse filter can be reduced, the medical worker does not need to distract and operate a recovery pipe and the snare connecting rod at the same time, the difficulty of the operation is greatly reduced, the operation is more convenient and faster, and the practicability is extremely strong.

Drawings

FIG. 1 is a schematic view of a vena cava filter capture apparatus of the present invention;

FIG. 2 is a cross-sectional view of a connecting tube according to the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a top view of a limiting arc block of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 2 at B according to the present invention.

In the figure: 1. a recovery pipe; 2. a connecting pipe; 3. a snare connection rod; 4. a snare; 5. a limiting mechanism; 51. limiting the arc-shaped block; 52. a connecting rod; 53. rotating the block; 6. a limiting block; 7. a groove; 8. a spring; 9. a limiting rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-5, the vena cava filter catcher comprises a recovery tube 1, a connecting tube 2 is sleeved inside the recovery tube 1 and used for limiting a hook of a vena cava filter through the arrangement of the connecting tube 2 and preventing the hook of the vena cava filter from entering the connecting tube 2, a snare connecting rod 3 is sleeved inside the connecting tube 2 and can drive a snare 4 and a limit block 6 to move up and down through the arrangement of the snare connecting rod 3, the snare 4 is bolted at the bottom of the snare connecting rod 3 and used for taking the hook of the vena cava filter through the arrangement of the snare 4, two limit mechanisms 5 are sleeved on the surface of the snare connecting rod 3 and used for limiting the limit block 6 through the arrangement of the limit mechanisms 5 and preventing the limit block 6 from moving down, the limit block 6 is fixedly sleeved on the surface of the snare connecting rod 3 and arranged through the limit block 6, the limiting mechanism 5 comprises two limiting arc-shaped blocks 51, the surfaces of the limiting arc-shaped blocks 51 are bolted with connecting rods 52, the connecting rods 52 are made of stainless steel, the stainless steel is divided into industrial stainless steel and medical stainless steel, the industrial stainless steel is short of stainless acid-resistant steel, and is called stainless steel by weak corrosion media such as air, steam and water or stainless steel types, and the stainless steel is divided into martensitic steel, ferritic steel, austenitic stainless steel, ferritic stainless steel, precipitation hardening stainless steel and the like according to the structure state, in addition, the stainless steel can be divided into chromium stainless steel, chromium-nickel stainless steel, chromium-manganese-nitrogen stainless steel and the like according to the components, and the medical stainless steel is made of (18-10), namely + 18% chromium + 10% nickel, so that the stainless steel is more durable and corrosion resistant, still leak metal ions, very close to the warning line, generally harmless but to be avoided by nickel allergy, this stainless steel is called 18-10 stainless steel, which is mainly used in the manufacture of medical instruments and tableware because of its durable and safe properties. Stainless steel can be classified into 4 and 3 series, 430(18-0), 304(18-8) and 316(18-10), 430 stainless steel (18-0) is chromium with iron content being more than 18% and has no nickel, oxidation caused by natural factors can be prevented, the stainless steel is called as stainless steel and is also called as 430 stainless steel, oxidation caused by chemical substances in air cannot be resisted, and after the 430 stainless steel is used for a period of time, oxidation (rusting) can still occur due to the unnatural factors. The 4 series stainless steel belongs to carbon-containing stainless steel, the hardness is higher than 2 series and 3 series, the corrosion resistance is lower than 3 series, the processing difficulty is large, the tensile is easy to break, the 304 stainless steel (18-8) is 18/8 stainless steel, products such as corrosion-resistant containers, tableware, furniture, railings and medical equipment, the 316 stainless steel has particularly good corrosion resistance, atmospheric corrosion resistance and high-temperature strength due to the addition of molybdenum, the stainless steel can be used under severe conditions, is mainly used for food industry, clock ornaments, pharmaceutical industry and surgical equipment, a molybdenum element is added to obtain a corrosion-resistant special structure, one side of the connecting rod 52 is bolted with the rotating block 53, one side of the rotating block 53 is bolted with the inner wall of the connecting pipe 2, two grooves 7 are respectively arranged in the connecting pipe 2, the inner parts of the grooves 7 are sleeved with the surface of the connecting rod 52, the connecting rod 52 can rotate through the arrangement of the grooves 7, thereby make stopper 6 can be smooth reachd the top of spacing arc 51, one side of spacing arc 51 has spring 8 through spring mounting bolt, the one end that spring 8 kept away from spacing arc 51 passes through spring mounting and the inside bolt of connecting pipe 2, through the setting of spring 8, played the effect of support to connecting rod 52, spring 8 also can drive connecting rod 52 and spacing arc 51 automatic re-setting and spacing to stopper 6 simultaneously, spring 8 is a mechanical part that utilizes elasticity to work, the part of making with elastic material takes place the deformation under the exogenic action, remove the exogenic action and resume the original state again, generally make with spring steel, the type of spring 8 is complicated various, divide according to the shape, mainly there are coil spring, volute spiral spring, leaf spring and abnormal shape spring, etc., spring 8 steerable mechanical motion, like the valve spring in the internal-combustion engine, The spring 8 can also absorb vibration and impact energy, such as a buffer spring under a car and a train carriage, a vibration absorbing spring in a coupling and the like, the spring 8 can also store and output energy as power, such as a clock spring, a firearm spring and the like, the spring 8 can also be used as a force measuring element, such as a force measuring device, a spring scale and the like, the ratio of the load and the deformation of the spring 8 is called as the rigidity of the spring 8, the larger the rigidity is, the harder the spring 8 is, the spring 8 is an elastic element widely used in the mechanical and electronic industries, the spring 8 can generate larger elastic deformation when being loaded, mechanical work or kinetic energy is converted into deformation energy, the deformation of the spring disappears and returns to the original state after being unloaded, the deformation energy is converted into the mechanical work or kinetic energy, a limiting rod 9 is arranged inside the groove 7, one side of the limiting rod 9 is connected with the inner bolt of the connecting pipe 2, the connecting rod 52 can be limited by the arrangement of the limiting rod 9, the connecting rod 52 is prevented from rotating towards the inside of the connecting pipe 2, one side of the limiting rod 9, which is close to the connecting rod 52, is contacted with the connecting rod 52, the connecting rod 52 can only rotate outwards and cannot rotate inwards by the arrangement of the limiting rod 9, which is close to the connecting rod 52, which is contacted with the connecting rod 52, the surface of the snare 4 is chamfered, the limiting block 6 can extrude the limiting arc-shaped block 51 more easily by the arrangement of the chamfering treatment on the surface of the snare 4, the resistance of the limiting block 6 to the limiting arc-shaped block 51 is further reduced, the inner diameter of the bottom end of the connecting pipe 2 is the same as the width of the pulse filter hook, the pulse filter hook can not enter the inside of the connecting pipe 2 by the arrangement of the same as the width of the pulse filter hook, and the length between the limiting mechanism 5 and the limiting block 6 is the same as the straightening length of the snare 4, the two limiting mechanisms 5 are arranged in the connecting pipe 2, the limiting block 6 is limited by the two limiting mechanisms 5, after the hook of the pulse filter is sleeved by the snare 4, the snare connecting rod 3 can be pulled to drive the limiting block 6 to be clamped with the two limiting mechanisms 5, and the snare 4 can lock the hook of the pulse filter at the bottom end of the connecting pipe 2, so that the aim of locking the hook of the pulse filter is fulfilled, the hook of the pulse filter can be prevented from being separated from the snare 4 due to looseness when a medical worker pulls the pulse filter, the medical worker is prevented from operating the hook of the pulse filter for the second time, the operation time of a patient is shortened, the injury to the vein of the patient is reduced, and the operation of the medical worker on the hook of the pulse filter can be reduced by tightening the catcher, medical staff is not needed to operate the recovery tube 1 and the snare connecting rod 3 at the same time, the difficulty of the operation is greatly reduced, the use is simple, convenient and quick, and the practicability is strong.

The working principle is as follows: when the snare venous indwelling device is used, the connecting pipe 2 and the snare connecting rod 3 are synchronously led into a vena cava of a patient, when the connecting pipe 2 and the snare connecting rod 3 enter the vena cava of the patient, the limiting block 6 is required to be arranged at the bottoms of the two limiting mechanisms 5, then the hook of the vena cava filter is sleeved through the snare 4, then the snare connecting rod 3 is pulled, the snare connecting rod 3 drives the limiting block 6 and the snare 4 to move, when the limiting block 6 reaches the bottoms of the two limiting mechanisms 5, medical staff continuously pulls the snare connecting rod 3, at the moment, the limiting block 6 can extrude the connecting rod 52 to rotate the connecting rod 52, the connecting rod 52 can extrude the two springs 8 when rotating, after the limiting block 6 reaches the tops of the two limiting mechanisms 5, the two extruded springs 8 automatically reset, and the two limiting arc-shaped blocks 51 can be driven by the two springs 8 to limit the limiting block 6, at this time, the snare 4 can tightly lock the hook of the pulse filter at the bottom end of the connecting pipe 2, then the recovery pipe 1 is sent into the vena cava of the patient, and the connecting pipe 2 is pulled, so that the connecting pipe 2 drives the snare connecting rod 3 and the pulse filter connected with the snare 4 at the bottom of the snare connecting rod 3 to enter the recovery pipe 1.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Vena cava filter capture device, including recovery tube (1), its characterized in that: the inner part of the recovery pipe (1) is sleeved with a connecting pipe (2), the inner part of the connecting pipe (2) is sleeved with a snare connecting rod (3), the bottom of the snare connecting rod (3) is bolted with a snare (4), the surface of the snare connecting rod (3) is sleeved with two limiting mechanisms (5), the surface of the snare connecting rod (3) is fixedly sleeved with a limiting block (6), each limiting mechanism (5) comprises two limiting arc-shaped blocks (51), the surface of each limiting arc-shaped block (51) is bolted with a connecting rod (52), one side of each connecting rod (52) is bolted with a rotating block (53), one side of each rotating block (53) is bolted with the inner wall of the connecting pipe (2), two grooves (7) are respectively formed in the connecting pipe (2), and the inner parts of the grooves (7) are sleeved with the surface of the connecting rod (52), one side of the limiting arc-shaped block (51) is bolted with a spring (8) through a spring fixing piece, and one end, far away from the limiting arc-shaped block (51), of the spring (8) is bolted with the inner part of the connecting pipe (2) through the spring fixing piece.

2. The vena cava filter trap according to claim 1, wherein: a limiting rod (9) is arranged inside the groove (7), and one side of the limiting rod (9) is bolted with the inside of the connecting pipe (2).

3. A vena cava filter trap according to claim 2 wherein: one side of the limiting rod (9) close to the connecting rod (52) is in contact with the connecting rod (52).

4. The vena cava filter trap according to claim 1, wherein: the surface of the snare (4) is chamfered.

5. The vena cava filter trap according to claim 1, wherein: the inner diameter of the bottom end of the connecting pipe (2) is the same as the width of the pulse filter hook.

6. The vena cava filter trap according to claim 1, wherein: the length between the limiting mechanism (5) and the limiting block (6) is the same as the straightening length of the snare (4).