CN115778493A - Foreign body forceps used in blood vessel - Google Patents
Foreign body forceps used in blood vessel Download PDFInfo
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- CN115778493A CN115778493A CN202211653479.XA CN202211653479A CN115778493A CN 115778493 A CN115778493 A CN 115778493A CN 202211653479 A CN202211653479 A CN 202211653479A CN 115778493 A CN115778493 A CN 115778493A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Abstract
The invention discloses a pair of forceps for foreign bodies in blood vessels, which comprises: the inner wall of the extending part is provided with a bending adjusting mechanism and comprises a first connecting rod and a second connecting rod, the first end of the first connecting rod is hinged with the first end of the second connecting rod, the second end of the first connecting rod and the second end of the second connecting rod are fixed on the inner wall of the extending part at intervals, the first connecting rod is connected with a traction wire, and when the first connecting rod is tensioned, the first connecting rod is pulled to rotate towards the direction far away from the second connecting rod and drives the second end of the second connecting rod to move towards the second end of the first connecting rod so as to drive the extending part to bend towards one side of the extending part provided with the bending adjusting mechanism; the holding part comprises a bending adjusting sliding seat fixed with one end of the traction wire; and the jaw is arranged at one end of the extending part and used for catching foreign matters in blood vessels. According to the invention, the bending adjusting structure is arranged on the extending part, so that the operation is carried out on the far-end holding part through the bending adjusting slide seat, the region of the extending part provided with the bending adjusting structure is bent, the jaw is driven to bend to pass through a tortuous blood vessel, and the operation is convenient and safe.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a pair of forceps for foreign bodies in blood vessels.
Background
Interventional medicine is a medical means of imaging, diagnosis and treatment by inserting a special catheter or instrument into a diseased region through a percutaneous puncture or through an original duct of a human body under the guidance of imaging medicine (X-ray, ultrasound, CT), and has become the third most clinical treatment means due to the advantages of small trauma, few complications and wide application range (applicable to the fields of cardiovascular and cerebrovascular diseases, peripheral vascular tumors, non-vascular diseases and the like).
However, in the process of interventional operation, thrombus is inevitably formed in the blood vessel due to the operation influence of various medical devices in the blood vessel, under the condition, a foreign body forceps is required to capture and take out foreign bodies in the blood vessel, in the prior art, the angle of the far end of the foreign body forceps used in the blood vessel cannot be adjusted, namely, one end of the foreign body forceps extending into the blood vessel cannot be adjusted, when the foreign body forceps enter the blood vessel in a tortuous state, the foreign body forceps can only turn by means of the blocking effect of the inner wall of the blood vessel, so that an operator needs to repeatedly perform the operation of pulling out and extending into the foreign body forceps for many times, the far end of the foreign body forceps is adjusted to a proper angle to enter the blood vessel, and subsequent continuous extending actions are performed.
Therefore, how to reduce the operation difficulty of the operation for removing the intravascular foreign substance and improve the safety of the removal of the intravascular foreign substance is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a forceps for removing a foreign body in a blood vessel, so as to reduce the difficulty of the removal operation of the foreign body in the blood vessel and improve the safety of the removal operation of the foreign body in the blood vessel.
In order to achieve the purpose, the invention provides the following technical scheme:
a foreign body forceps for use in a blood vessel comprising:
the bending adjusting mechanism comprises a first connecting rod and a second connecting rod, the first end of the first connecting rod is hinged to the first end of the second connecting rod, the second end of the first connecting rod and the second end of the second connecting rod are fixedly arranged on the inner wall of the stretching portion at intervals, the first connecting rod is connected with a traction wire, and the traction wire pulls the first connecting rod to rotate towards the direction far away from the second connecting rod when being tensioned and drives the second end of the second connecting rod to move towards the second end of the first connecting rod so as to drive the stretching portion to bend towards the side, where the bending adjusting mechanism is arranged, of the stretching portion;
the holding part comprises a bending adjusting sliding seat, and the bending adjusting sliding seat is fixed with one end of the traction wire and used for tensioning or releasing the traction wire;
the jaw is arranged at one end, far away from the bending sliding seat, of the extending part and used for catching foreign matters in blood vessels.
Preferably, in the forceps for removing foreign bodies in blood vessels, two or more bending adjusting mechanisms are arranged on the inner wall of the extending part, and the two or more bending adjusting mechanisms are uniformly arranged along the circumferential direction of the extending part.
Preferably, in the forceps for foreign bodies in blood vessels, the bending adjusting slide base slides along the first direction to tension the traction wire, a protruding portion is arranged on the bending adjusting slide base, a limiting plate is further arranged on the holding portion, a plurality of limiting grooves are formed in the limiting plate along the first direction at equal intervals, and the limiting grooves are used for clamping the protruding portion at a plurality of positions in the first direction to adjust the tension degree of the bending adjusting slide base on the traction wire.
Preferably, in the forceps for intravascular foreign bodies, the forceps further comprise an adjusting spring, two ends of the adjusting spring respectively abut against the bending adjusting slide and a fixing area of the holding part, and the adjusting spring is in a compressed state during sliding of the bending adjusting slide along the first direction.
Preferably, in the forceps for intravascular foreign body, the bend adjustment slider is provided with a first protrusion for clamping the inner ring of the adjustment spring.
Preferably, in the above forceps for intravascular use for foreign bodies, an outer wall of the protruding portion is coated with a hydrophilic coating.
Preferably, in the forceps for foreign bodies in blood vessels, the jaw includes an upper jaw piece and a lower jaw piece, a rhombic link mechanism formed by sequentially hinging four connecting rods with the same length end to end is arranged at the jaw, a first end point of the rhombic link mechanism is connected with a connecting wire, a second end point of the rhombic link mechanism is two points opposite to the first end point, the first end point is an end point far away from the jaw, and the upper jaw piece, the lower jaw piece and two connecting rods adjacent to the second end point form a lever structure;
when the connecting wire pulls the first end point to move away from the second end point, the upper clamp piece and the lower clamp piece move oppositely.
Preferably, in the forceps for intravascular foreign matter, a pulling handle is slidably disposed on the holding portion, the pulling handle is fixedly connected to one end of the connecting wire, the pulling handle is slid to pull the connecting wire, and the first end point is pulled by the connecting wire to move away from the second end point.
Preferably, in the above forceps for intravascular foreign matter, the rhombic link mechanism is disposed in the chute.
Preferably, in the forceps for removing a foreign body inside a blood vessel, the extending portion and the holding portion are connected by a tube body, and the tube body has a multi-stage telescopic structure.
Preferably, in the forceps for removing foreign matters in blood vessels, the tube body includes a first connecting tube, a second connecting tube and a third connecting tube which are sequentially sleeved and have sequentially reduced outer diameters, a single connecting tube is in a hollow round table shape, one end of the single connecting tube, which is far away from the holding part, is the end of the round table with a smaller round surface, and the single connecting tube is clamped and fixed by another connecting tube sleeved outside the single connecting tube when extending out to the maximum extending distance.
Preferably, in the forceps for intravascular foreign matter, an inner diameter of one end of the first connecting tube, which is far away from the holding portion, is 2.10mm to 2.15mm, an outer diameter of one end of the second connecting tube, which is near to the holding portion, is 2.15mm to 2.20mm, an inner diameter of one end of the third connecting tube, which is far away from the holding portion, is 1.80mm to 1.85mm, and an outer diameter of one end of the third connecting tube, which is near to the holding portion, is 1.85mm to 1.90mm.
Preferably, in the forceps for intravascular foreign body, the outer periphery of the tube body is made of nylon or polyether block polyamide, and the inner part of the tube body is nested in a metal braided structure.
Preferably, in the forceps for intravascular foreign bodies, the jaws are basket-shaped and the jaws are provided with engaging teeth.
Preferably, in the forceps for intravascular foreign matter described above, the jaws are made of stainless steel, and the exterior of the jaws is coated with a hydrophilic polymer.
The technical scheme shows that the forceps for the foreign matters in the blood vessel provided by the invention comprises a holding part, an extending part and a jaw, wherein the extending part is used for extending into the blood vessel to drive the jaw to enter the blood vessel and capture the foreign matters in the blood vessel, particularly, a bending adjusting mechanism is arranged on the inner wall of the extending part, specifically, the bending adjusting mechanism comprises a first connecting rod and a second connecting rod, the first end of the first connecting rod is hinged with the first end of the second connecting rod, meanwhile, the second end of the first connecting rod and the second end of the second connecting rod are fixedly arranged on the inner wall of the extending part at intervals, when the first connecting rod rotates by taking the second end as the circle center, the second connecting rod is driven to rotate by the hinged structure, so that the second end of the second connecting rod is driven to move towards the second end of the first connecting rod, and the distance of the second end of first connecting rod and the second end of second connecting rod shortens and can lead to stretching into the portion and produce the bending in the position that sets up the accent curved mechanism, the crooked direction is promptly stretching into the portion in the direction of the second end fixed position of first connecting rod, and in order to realize the distal end operation that the portion of stretching into transferred the curve, first connecting rod is connected with the haulage wire, the haulage wire can pull first connecting rod orientation when taut and keep away from the direction rotation of second connecting rod, and drive the second end motion of the second end orientation first connecting rod of second connecting rod, correspondingly, the portion of gripping is including transferring the curved slide, the one end and the first connecting rod of haulage wire are connected, the other end and transferring the curved slide fixed connection, transfer curved slide with taut or release haulage wire through the operation of the portion of gripping, in order to carry out the pulling or the release of first connecting rod, can make the operating personnel conveniently swiftly carry out the accent of the portion of stretching into and return the operation. According to the forceps for foreign matters in blood vessels, the bending adjusting mechanism is arranged in the extending part and is driven by the traction wire, the distance between two fixed points of the bending adjusting mechanism on the inner wall of the extending part is shortened through two hinged connecting rods, so that the effect that the extending part is bent towards one side provided with the bending adjusting mechanism is generated, when the extending part needs to drive the forceps jaws to extend into blood vessels with large bending angles, the extending part and the forceps jaws can be prevented from damaging the inner walls of the blood vessels through operating the bending adjusting mechanism, the safety of the operation is improved, meanwhile, the bending adjusting slide seat used for driving one end of the traction wire of the bending adjusting mechanism to be connected to the holding part is used for driving the surgical personnel to realize the bending adjusting action of the extending part through operating the distal bending slide seat and driving the forceps jaws to enter the target blood vessels.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a forceps for intravascular foreign body according to an embodiment of the present invention;
FIG. 2 is a schematic view of the extension portion and the jaw structure of the forceps for intravascular foreign body according to the present invention;
FIG. 3 is a schematic view of a structure of a holding portion of a forceps for intravascular foreign body according to an embodiment of the present invention;
FIG. 4 is a detailed structural diagram of a bending adjusting mechanism of the forceps for foreign body in blood vessels according to the embodiment of the present invention;
FIG. 5 is a schematic view of a tube body structure of a forceps for removing foreign bodies in a blood vessel according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a pair of jaws of a forceps for endovascular foreign body, according to an embodiment of the present invention, shown deployed in a vessel;
FIG. 7 is a structural diagram illustrating a bending state of an extension portion of a forceps for intravascular foreign body according to an embodiment of the present invention;
wherein, 10 is an extending part, 110 is a bending adjusting mechanism, 1110 is a first connecting rod, 1120 is a second connecting rod, 120 is a traction wire, 20 is a holding part, 210 is a bending adjusting slide seat, 2110 is a convex part, 2120 is a first convex part, 220 is a limiting plate, 2210 is a limiting groove, 230 is an adjusting spring, 240 is a pulling handle, 30 is a jaw, 310 is an upper jaw, 320 is a lower jaw, 330 is an engaging tooth, 40 is a diamond-shaped connecting rod mechanism, 410 is a first end point, 420 is a second end point, 430 is a connecting wire, 50 is a sliding groove, 60 is a pipe body, 610 is a first connecting pipe, 620 is a second connecting pipe, and 630 is a third connecting pipe.
Detailed Description
The invention discloses a pair of forceps for removing foreign matters in a blood vessel, which is used for reducing the operation difficulty of removing the foreign matters in the blood vessel and improving the safety of removing the foreign matters in the blood vessel.
In order that those skilled in the art will better understand the present invention, embodiments thereof will be described below with reference to the accompanying drawings. The embodiments described below are not intended to limit the scope of the present invention as set forth in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.
As shown in fig. 1 to 7, the forceps for foreign body in blood vessel according to an embodiment of the present invention includes a holding portion 20, an inserting portion 10, and a jaw 30, wherein the jaw 30 is disposed at an end of the inserting portion 10 away from the holding portion 20, so as to be driven by the inserting portion 10 into the blood vessel, and perform an action of capturing the foreign body in the blood vessel, and in order to perform a bending adjustment on the inserting portion 10, so as to achieve bending of the jaw 30 and enable the inserting portion 10 to smoothly insert into the blood vessel with a large bending angle, in particular, as shown in fig. 2, a bending adjustment mechanism 110 is disposed on an inner wall of the inserting portion 10, and in a specific embodiment of the present invention, the bending adjustment mechanism includes a first connecting rod 1110 and a second connecting rod 1120, a first end of the first connecting rod 1110 is hinged to a first end of the second connecting rod 1120, and a second end of the first connecting rod 1110 and a second end of the second connecting rod 1120 are fixedly disposed on an inner wall of the inserting portion 10 at an interval, and a fixed connection line between the second end of the first connecting rod 1110 and the second connecting rod 1120 passes through the inner wall of the inserting portion 10, so that the second connecting rod 1110 and the second connecting rod 1120 rotates to drive the second connecting rod 1110 to rotate the second connecting rod 1120, so as to rotate the second connecting rod 1110 toward a circle center of the second connecting rod 1120, so that the second connecting rod 1110, and the second connecting rod 1120, and the second connecting rod 1110 rotates to cause the second connecting rod to rotate, so that the second connecting rod to rotate the second connecting rod to drive the second connecting rod to rotate, and the second connecting rod to drive the second connecting rod to shorten a fixed position, and the second connecting rod to move toward the second connecting rod 1120, and the second connecting rod to drive the second connecting rod to rotate, so as to drive the second connecting rod to rotate.
In order to implement the operation of the bending adjustment mechanism 110, especially the distal end operation of the bending adjustment mechanism 110, as shown in fig. 3, in the forceps for a foreign body in a blood vessel provided in an embodiment of the present invention, the first link 1110 is connected with the pull wire 120, when the pull wire 120 is pulled, the first link 1110 is pulled to rotate in a direction away from the second link 1120, and the second end of the second link 1120 is driven to move toward the second end of the first link 1110, correspondingly, the grip portion 20 includes a bending adjustment slider 210, one end of the pull wire 120 is connected to the first link 1110, and the other end is fixedly connected to the bending adjustment slider 210, and by operating the bending adjustment slider 210 at the grip portion 20 to pull or release the pull wire 120, so as to pull or release the first link 1110, the bending adjustment and the return operation of the extension portion 10 can be conveniently and quickly performed by an operator.
It should be noted that, in another embodiment of the present invention, in order to optimize the bending adjustment effect, the second end of the second link 1120 is a square slider, so as to increase the contact area between the second end of the second link 1120 and the inside of the protruding portion 10, so that when the second end of the second link 1120 moves toward the second end of the first link 1110, the inner wall of the protruding portion 10 can be tensioned more stably, and the bending adjustment effect of the protruding portion 10 is ensured.
It should be further noted that the extending portion 10 has a certain ductility structure, and when extending into the blood vessel, the end portion of the extending portion 10 can be bent to continuously push the extending portion 10, so that after the bending adjusting slide 210 is operated to adjust the bending of the extending portion 10 by tightening the pull wire 120, the pull wire 120 can be released, and the bending adjusting operation can be performed again after the subsequent steering is required.
According to the forceps for the foreign body in the blood vessel provided by the embodiment of the invention, the bending adjusting mechanism 110 is arranged in the extending part 10, the bending adjusting mechanism 110 is driven by the pull wire 120, the distance between two fixed points of the bending adjusting mechanism 110 on the inner wall of the extending part 10 is shortened through two hinged connecting rods, so that the effect that the extending part 10 bends towards one side provided with the bending adjusting mechanism 110 is generated, when the extending part 10 needs to drive the jaw 30 to extend into the blood vessel with a larger bending angle, the extending part 10 and the jaw 30 can be prevented from damaging the inner wall of the blood vessel by operating the bending adjusting mechanism 110, the safety of the operation is improved, meanwhile, one end of the pull wire 120 used for driving the bending adjusting mechanism 110 is connected to the bending adjusting slide seat 210 of the holding part 20, the surgical personnel can realize the bending adjusting action of the extending part 10 by operating the bending adjusting slide seat 210 at the far end, and drive the jaw 30 to enter the target blood vessel, compared with the prior art that the jaw 30 extends into the blood vessel, the technical requirements on the surgical personnel are lower, the operation is simple and quick, and the operation difficulty is effectively reduced.
In the above embodiment, the extending portion 10 can bend toward the inner wall in the direction of the extending portion 10, the extending portion 10 is a cylindrical structure, and when the jaw 30 needs to be driven into a tortuous blood vessel and the extending portion 10 needs to be bent toward a specific direction, the surgical personnel can rotate the extending portion 10 to rotate the bending mechanism 110 to the direction in which bending needs to be adjusted, so as to achieve bending adjustment of the extending portion 10 toward the specific direction, but the above operation may increase the difficulty of the surgery, and may also scratch the inner wall of the blood vessel due to improper operation of the outer wall of the extending portion 10, therefore, in order to further optimize the above technical solution, on the basis of the above embodiment, two or more bending adjusting mechanisms 110 are provided on the inner wall of the extending portion 10, so as to provide more bending adjusting directions for the extending portion 10 when the extending portion 10 enters the blood vessel at a single angle, that the extending portion 10 can bend toward any position where the bending adjusting mechanism 110 is provided, and at the same time, it is preferable that two or more bending adjusting mechanisms 110 are uniformly provided along the circumference of the extending portion 10, so as to ensure that the extending portion 10 can be bent toward the specific direction, and the subsequent bending adjusting mechanism 110 can be quickly and the extending portion 10 can be rotated toward the specific direction, and the subsequent bending adjusting mechanism 110 can be adjusted, and the subsequent bending mechanism can be adjusted to perform a subsequent operation in a small angle when the subsequent operation, that the subsequent operation is needed.
In the forceps for foreign bodies in blood vessels according to embodiments of the present invention, the pull wire 120 can be tensioned by the bending adjustment slider 210 in various ways, such as sliding the bending adjustment slider 210 to tension the pull wire 120, or rotating the bending adjustment slider 210 to wind and tension the pull wire 120, in a specific embodiment of the present invention, as shown in fig. 4, the bending adjustment slider 210 slides to tension the pull wire 120, specifically, the bending adjustment slider 210 slides in a first direction to tension the pull wire 120, and in order to maintain the tension state of the pull wire 120 during the bending adjustment, the bending adjustment slider 210 is further provided with a protrusion 2110, and correspondingly, the holding portion 20 is further provided with a position limiting plate 220, the position limiting plate 220 is provided with a plurality of position limiting grooves 2210 in the first direction, so that the plurality of position limiting grooves in the first direction are engaged with the protrusion 2110, thereby achieving the position limiting of the bending adjustment slider 210, and maintaining the tension state of the pull wire 120, preferably, the plurality of position limiting grooves 2210 are provided at equal intervals on the position limiting plate 220, and the position limiting grooves 2210 are provided at equal intervals, thereby achieving the uniform distance adjustment of the pull wire 120, and facilitating the surgical operation.
Further, the forceps for removing foreign bodies in blood vessels provided by the embodiment of the present invention is further provided with an adjusting spring 230, two ends of the adjusting spring 230 respectively abut against the fixing areas of the bending adjusting slider 210 and the holding portion 20, and meanwhile, the adjusting spring 230 is in a compressed state during the sliding process of the bending adjusting slider 210 along the first direction, so as to assist the bending adjusting slider 210 to return to the original position after the bending adjusting action of the protruding portion is completed, thereby playing a role of returning.
In order to further optimize the above technical solution, a first protrusion 2120 is provided on the bending slider 210, and the first protrusion 2120 is used for being snapped into an inner ring of the adjusting spring 230 to improve the stability of the connection between the adjusting spring 230 and the bending slider 210, it should be noted that a second protrusion is preferably provided on a fixing area of the grip portion 20 for abutting against the adjusting spring 230, and the second protrusion is likewise snapped into the inner ring of the adjusting spring 230 to keep the stability of the adjusting spring 230.
Further, in an embodiment of the present invention, the outer wall of the protrusion portion 10 is coated with a hydrophilic coating to prevent the outer wall of the protrusion portion 10 from scratching the inner wall of the blood vessel.
Further, as shown in fig. 6 and 7, in the forceps for foreign body in blood vessel according to the embodiment of the present invention, the specific operation of controlling the opening and closing of the jaw 30 is as follows, the jaw 30 includes the upper jaw 310 and the lower jaw 320, a diamond-shaped link mechanism 40 formed by four links with the same length hinged end to end in sequence is disposed at the jaw 30, the diamond-shaped link mechanism includes four end points, wherein the first end point 410 and the second end point 420 are opposite end points, the first end point 410 is an end point far away from the jaw 30, the second end point 420 is an end point closest to the jaw 30, the first end point 410 is connected with the connecting wire 430, when the first end point 410 is pulled by the connecting wire 430 to move away from the jaw 30, in the diamond-shaped link mechanism, two links adjacent to the second end point 420 rotate and move around the second end point 420 as a center, and the second end point 420 is a fulcrum, the upper nipper blade 310, the lower nipper blade 320 and the two connecting rods adjacent to the second end point 420 form a lever structure, when the two connecting rods adjacent to the second end point 420 rotate around the second end point 420 and move towards each other, the lever structure drives the upper nipper blade 310 and the lower nipper blade 320 to move towards each other, that is, when the first end point 410 is pulled by the connecting wire 430 to move away from the second end point 420, the upper nipper blade 310 and the lower nipper blade 320 move towards each other, so that the jaws 30 are closed, and thus foreign objects in blood vessels are caught by the jaws 30, similarly, in order to reopen the jaws 30 after the jaws 30 fail to catch the foreign objects, the hinge position of the two connecting rods adjacent to the second end point 420 is a hinge portion capable of providing a resetting effect, and when the connecting wire 430 is loosened, the two connecting rods adjacent to the second end point 420 rotate around the second end point 420 and move away from each other, thereby moving the upper and lower jaws 310, 320 back and forth, and opening the jaws 30 in preparation for a subsequent opening operation.
Further, in addition to the above-described embodiment, in order to realize the distal end adjustment of the opening and closing operation of the jaw 30, the pulling handle 240 is slidably provided on the grip portion 20, one end of the connecting wire 430 is fixedly connected to the pulling handle 240, the connecting wire 430 can be pulled by sliding the pulling handle 240, and the first end point 410 is pulled by the connecting wire 430 to move away from the second end point 420, and the pulling handle 240 provided on the grip portion 20 can facilitate the operation of opening and closing the jaw 30 by the operator, and it should be noted that the connecting wire 430 is a flexible wire.
Further, in an embodiment of the present invention, the rhombic connecting rod mechanism 40 in the forceps for the foreign body in the blood vessel is disposed in the sliding slot 50, so that each connecting rod in the rhombic connecting rod mechanism 40 is in the sliding slot 50, i.e. can move in the same plane, thereby maintaining the stability of the movement of the rhombic connecting rod mechanism 40 and ensuring the smoothness of the opening and closing process of the jaws 30.
Further, in the forceps for intravascular foreign matter according to the embodiment of the present invention, the insertion portion 10 and the grip portion 20 are connected by the tube body 60, and in order to obtain a sufficient extension length of the insertion portion 10, the tube body 60 is preferably of a multi-stage telescopic structure.
In order to further optimize the above technical solution, as shown in fig. 5, the tube body 60 includes a first connection tube 610, a second connection tube 620 and a third connection tube 630 which are sequentially sleeved and have sequentially reduced outer diameters, it should be noted that, here, the sequential sleeving specifically means that the first connection tube 610 is sleeved on the outer periphery of the connection tubes, the second connection tube 620 is sleeved on the outer periphery of the third connection tube 630, and the configuration of any connection tube is a hollow circular truncated cone configuration, that is, the section diameter of a single connection tube is a gradual change form, and one end of the single connection tube, which is far away from the holding portion 20, is an end with a smaller circular surface size on the circular truncated cone, and the diameters of two connected sleeved connection tubes are matched, where the diameter matching specifically is that when any connection tube extends to the maximum extension distance, the end of the connection tube is clamped and fixed by another connection tube sleeved outside, so as to form a structure similar to a fishing rod, and enable the extension portion to obtain a sufficient extension length.
The tube body 60 may have a structure having a plurality of stages of connection tubes according to actual operation needs.
Further, in an embodiment of the present invention, an inner diameter of one end of the first connecting tube 610 far from the holding portion 20 is 2.10mm to 2.15mm, an outer diameter of one end of the second connecting tube 620 near the holding portion 20 is 2.15mm to 2.20mm, when the second connecting tube 620 extends out of the first connecting tube 610, one end of the second connecting tube 620 near the holding portion 20 is clamped by one end of the first connecting tube 610 far from the holding portion 20, so that the first connecting tube 610 is stably sleeved outside the second connecting tube 620, an inner diameter of one end of the second connecting tube 620 far from the holding portion 20 is 1.80mm to 1.85mm, and an outer diameter of one end of the third connecting tube 630 near the holding portion 20 is 1.85mm to 1.90mm, so as to achieve the same effect as the above technical effect.
Further, in an embodiment of the present invention, the outer circumference of the tube body 60 is made of nylon or polyether block polyamide, and the inner part is nested into the metal woven structure, so that the tube body 60 has a certain ductility and an integral strength enough to be pushed by the operator.
Further, as with the protruding portion 10, the outer periphery of the shaft 60 is also preferably coated with a hydrophilic coating to prevent the shaft 60 from scratching blood vessels.
Further, in order to ensure the capturing effect of the jaws 30 on the foreign objects in the blood vessel, in an embodiment of the present invention, the jaws 30 are basket-shaped, and the jaws 30 are provided with engaging teeth 330.
In order to further optimize the above technical solution, it is preferable that the jaw 30 is made of stainless steel, and the exterior of the jaw 30 is coated with hydrophilic polymer to improve safety when the jaw 30 catches foreign matters.
The terms "first," "second," "left," and "right" and the like in the description and claims of the invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not set forth for a listed step or element but may include steps or elements not listed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (15)
1. A forceps for foreign bodies in blood vessels, comprising:
the bending adjusting mechanism comprises a first connecting rod (1110) and a second connecting rod (1120), a first end of the first connecting rod (1110) is hinged to a first end of the second connecting rod (1120), a second end of the first connecting rod (1110) and a second end of the second connecting rod (1120) are fixedly arranged on the inner wall of the bending adjusting mechanism (10) at intervals, the first connecting rod (1110) is connected with a traction wire (120), and when the traction wire (120) is tensioned, the first connecting rod (1110) is pulled to rotate towards a direction far away from the second connecting rod (1120), and the second end of the second connecting rod (1120) is driven to move towards the second end of the first connecting rod (1110), so that the bending adjusting mechanism (110) is driven to bend the bending adjusting mechanism (10) towards one side of the bending adjusting mechanism;
the holding part (20) comprises a bending adjusting slide seat (210), and the bending adjusting slide seat (210) is fixed with one end of the traction wire (120) and is used for tensioning or releasing the traction wire (120);
the jaw (30) is arranged at one end, far away from the bending adjusting sliding seat (210), of the extending part (10) and used for catching foreign matters in blood vessels.
2. The forceps for foreign bodies in blood vessels according to claim 1, wherein the bending adjusting mechanism (110) is provided in two or more numbers on the inner wall of the protruding part (10), and two or more bending adjusting mechanisms (110) are uniformly provided along the circumference of the protruding part (10).
3. The forceps for foreign bodies in blood vessels according to claim 1, wherein the bending adjusting slide base (210) slides along a first direction to tension the pull wire (120), the bending adjusting slide base (210) is provided with a protrusion (2110), the holding portion (20) is further provided with a limiting plate (220), the limiting plate (220) is provided with a plurality of limiting grooves (2210) at equal intervals along the first direction, and the limiting grooves (2210) are used for clamping the protrusion (2110) at a plurality of positions in the first direction to adjust the tension degree of the bending adjusting slide base (210) on the pull wire (120).
4. The forceps for foreign bodies in blood vessels according to claim 3, further comprising an adjusting spring (230), both ends of the adjusting spring (230) abutting against the bending slider (210) and a fixing area of the grip portion (20), respectively, the adjusting spring (230) being in a compressed state during the sliding of the bending slider (210) in the first direction.
5. The forceps for endovascular foreign bodies according to claim 4, wherein the bending slider (210) is provided with a first protrusion (2120) for engaging with the inner ring of the adjusting spring (230).
6. Forceps for foreign bodies inside a blood vessel according to claim 1, characterised in that the outer wall of the insertion part (10) is coated with a hydrophilic coating.
7. The forceps for foreign bodies in blood vessels according to claim 1, wherein the jaw (30) comprises an upper forceps sheet (310) and a lower forceps sheet (320), a diamond-shaped link mechanism (40) formed by four links with the same length hinged end to end is arranged at the jaw (30), a connecting wire (430) is connected to a first end point (410) of the diamond-shaped link mechanism (40), a second end point (420) of the diamond-shaped link mechanism (40) is two points opposite to the first end point (410), the first end point (410) is one end point far away from the jaw (30), and the upper forceps sheet (310), the lower forceps sheet (320) and two links adjacent to the second end point (420) form a lever structure;
when the connecting wire (430) pulls the first end point (410) to move away from the second end point (420), the upper clamp piece (310) and the lower clamp piece (320) move towards each other.
8. The forceps for foreign bodies in blood vessels according to claim 7, characterized in that a pulling handle (240) is slidably provided on the grip portion (20), the pulling handle (240) is fixedly connected with one end of the connecting wire (430), the pulling handle (240) is slid to pull the connecting wire (430), and the first end point (410) is pulled by the connecting wire (430) to move away from the second end point (420).
9. The forceps for endovascular foreign bodies of claim 7, wherein the diamond-shaped linkage (40) is disposed in a slide slot (50).
10. The forceps for foreign bodies in blood vessels according to claim 1, wherein the protruding portion (10) and the grip portion (20) are connected by a tube body (60), and the tube body (60) has a multi-stage telescopic structure.
11. The forceps for foreign bodies in blood vessels according to claim 10, wherein the tube body (60) comprises a first connecting tube (610), a second connecting tube (620) and a third connecting tube (630) which are sequentially sleeved and have sequentially reduced outer diameters, the single connecting tube has a hollow circular truncated cone configuration, one end of the single connecting tube, which is far away from the holding portion (20), is the end of the single connecting tube, which has a smaller circular surface size, on the circular truncated cone, and the single connecting tube is clamped and fixed by the other connecting tube sleeved outside the single connecting tube when the single connecting tube extends to the maximum extension distance.
12. The forceps for foreign substances in blood vessels according to claim 11, wherein the first connection tube (610) has an inner diameter of 2.10mm to 2.15mm at an end away from the grip portion (20), the second connection tube (620) has an outer diameter of 2.15mm to 2.20mm at an end close to the grip portion (20), the third connection tube (630) has an inner diameter of 1.80mm to 1.85mm at an end away from the grip portion (20), and the third connection tube (630) has an outer diameter of 1.85mm to 1.90mm at an end close to the grip portion (20).
13. The forceps for foreign bodies in blood vessels according to claim 10, wherein the outer circumference of the tube body (60) is made of nylon or polyether block polyamide, and the inner part of the tube body is nested in a metal braided structure.
14. Forceps for endovascular foreign bodies according to claim 1, characterized in that the jaws (30) are basket-shaped and in that the jaws (30) are provided with relative gripping teeth (330).
15. The forceps for foreign bodies in blood vessels according to claim 1, characterized in that the jaws (30) are made of stainless steel and the exterior of the jaws (30) is coated with a hydrophilic polymer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211653479.XA CN115778493B (en) | 2022-12-21 | 2022-12-21 | Foreign body forceps for blood vessel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211653479.XA CN115778493B (en) | 2022-12-21 | 2022-12-21 | Foreign body forceps for blood vessel |
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| CN115778493A true CN115778493A (en) | 2023-03-14 |
| CN115778493B CN115778493B (en) | 2023-10-20 |
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| Publication number | Publication date |
|---|---|
| CN115778493B (en) | 2023-10-20 |
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