CN115778493B - Foreign body forceps for blood vessel - Google Patents
Foreign body forceps for blood vessel Download PDFInfo
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- CN115778493B CN115778493B CN202211653479.XA CN202211653479A CN115778493B CN 115778493 B CN115778493 B CN 115778493B CN 202211653479 A CN202211653479 A CN 202211653479A CN 115778493 B CN115778493 B CN 115778493B
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- 210000004204 blood vessel Anatomy 0.000 title claims abstract description 71
- 238000005452 bending Methods 0.000 claims abstract description 111
- 230000007246 mechanism Effects 0.000 claims abstract description 57
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
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- 239000004677 Nylon Substances 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- 229920001477 hydrophilic polymer Polymers 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
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- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
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Classifications
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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 foreign body forceps for blood vessel, comprising: the stretching-in part is used for stretching into a blood vessel, the inner wall is provided with a bending adjustment 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 is fixedly arranged on the inner wall of the stretching-in part between the second end of the second connecting rod and the second end of the second connecting rod, the first connecting rod is connected with a traction wire, when the traction wire is tensioned, the first connecting rod is pulled to rotate in a direction away from the second connecting rod, and the second end of the second connecting rod is driven to move towards the second end of the first connecting rod so as to drive the stretching-in part to bend towards one side of the stretching-in part, which is provided with the bending adjustment mechanism; the holding part comprises a bending adjusting sliding seat fixed with one end of the traction wire; the jaw is arranged at one end of the extending part and is used for capturing foreign matters in the blood vessel. According to the invention, the bending structure is arranged on the extending part, so that the bending slide seat is used for operating the distal holding part, and the region of the extending part provided with the bending structure is bent, so that the jaw is driven to bend to pass through a tortuous 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 foreign body forceps used in blood vessels.
Background
Interventional medicine is a medical means for performing radiography, diagnosis and treatment by inserting a special catheter or instrument into a lesion site through a percutaneous puncture path or through an original duct of a human body under the guidance of image medicine (X-ray, ultrasound and CT), and has the advantages of small trauma, less complications and wide application range (being applicable to the fields of cardiovascular and cerebrovascular, peripheral vascular tumor, non-vascular and the like), so that the interventional medicine becomes a third largest clinical treatment means.
However, in the interventional operation, thrombus is inevitably formed in the blood vessel due to the operation influence of various medical devices in the blood vessel, in this case, foreign matter needs to be caught and taken out in the blood vessel by using a foreign matter clamp, in the prior art, the angle of the far end of the foreign matter clamp used in the blood vessel cannot be adjusted, that is, one end of the foreign matter clamp extending into the blood vessel cannot be adjusted, and when the blood vessel enters a tortuous state, the blood vessel can only turn by means of the blocking effect of the inner wall of the blood vessel, so that an operator is required to repeatedly execute the operations of pulling out and extending into the foreign matter clamp for many times, the far end of the foreign matter clamp is adjusted to a proper angle to enter the blood vessel, and the subsequent continuous extending action is carried out.
Therefore, how to reduce the operation difficulty of the intravascular foreign body removal operation and improve the intravascular foreign body removal safety is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
Accordingly, the present invention is directed to a foreign body forceps for use in blood vessels, which can reduce the difficulty of the operation of removing the foreign body from the blood vessels and improve the safety of removing the foreign body from the blood vessels.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a pair of foreign body forceps for use in a blood vessel, comprising:
the device comprises an extending part, a bending adjusting mechanism and a bending adjusting mechanism, wherein the extending part is used for extending into a blood vessel, the inner wall of the extending part is provided with the bending adjusting mechanism, 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, 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, the first connecting rod is connected with a traction wire, the traction wire is pulled to rotate in a direction away from the second connecting rod when being tensioned, and the second end of the second connecting rod is driven 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 bending adjusting mechanism;
the holding part comprises a bending adjustment sliding seat, wherein the bending adjustment sliding seat is fixed with one end of the traction wire and is used for tensioning or releasing the traction wire;
the jaw is arranged at one end of the extending part far away from the bending slide seat and used for capturing foreign matters in the blood vessel.
Preferably, in the above-mentioned foreign matter forceps for use in a blood vessel, the bending mechanism is provided in two or more on an inner wall of the projecting portion, and the two or more bending mechanisms are provided uniformly along a circumferential direction of the projecting portion.
Preferably, in the above-mentioned foreign matter forceps for intravascular, the bending adjustment slide is slid along a first direction to tighten the traction wire, a protruding portion is provided on the bending adjustment slide, a limiting plate is further provided on the holding portion, a plurality of limiting grooves are provided on the limiting plate at equal intervals along the first direction, and the limiting grooves are used for clamping the protruding portion at a plurality of positions along the first direction to adjust the tightening degree of the bending adjustment slide on the traction wire.
Preferably, in the above-mentioned foreign body forceps for intravascular use, the foreign body forceps further comprise an adjusting spring, two ends of the adjusting spring respectively abut against the bending slide seat and the fixing area of the holding portion, and the adjusting spring is in a compressed state during sliding of the bending slide seat along the first direction.
Preferably, in the above-mentioned foreign matter forceps for blood vessel, the bending slide is provided with a first protrusion for clamping the inner ring of the adjusting spring.
Preferably, in the above-mentioned foreign body forceps for use in blood vessels, an outer wall of the protruding portion is coated with a hydrophilic coating.
Preferably, in the above foreign body forceps for intravascular use, the jaw includes an upper forceps piece and a lower forceps piece, a diamond-shaped linkage mechanism formed by hinging four links with the same length end to end in sequence is arranged at the jaw, a first end point of the diamond-shaped linkage mechanism is connected with a connecting wire, a second end point of the diamond-shaped linkage mechanism is two points opposite to the first end point, the first end point is one end point far away from the jaws, and the upper forceps piece, the lower forceps piece and two links 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 in opposite directions.
Preferably, in the above-mentioned foreign body forceps for use in a blood vessel, a pulling handle is slidably disposed on the grip portion, the pulling handle is fixedly connected with one end of the connecting wire, and the pulling handle is slidably disposed to pull the connecting wire, and the first end point is pulled to move away from the second end point by the connecting wire.
Preferably, in the above-mentioned foreign body forceps for blood vessel, the diamond-shaped link mechanism is disposed in the chute.
Preferably, in the above-mentioned foreign body forceps for use in 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 above-mentioned foreign matter forceps for intravascular, 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, the single connecting tube is in a hollow round table configuration, and one end far away from the holding portion is one end with smaller round surface size on the round table, and the single connecting tube is sleeved outside the connecting tube and is clamped and fixed when being stretched out to the maximum stretching distance.
Preferably, in the above-mentioned foreign body forceps for use in blood vessels, an inner diameter of an end of the first connecting tube, which is far from the holding portion, is 2.10mm to 2.15mm, an outer diameter of an end of the second connecting tube, which is near to the holding portion, is 2.15mm to 2.20mm, an inner diameter of an end of the third connecting tube, which is far from the holding portion, is 1.80mm to 1.85mm, and an outer diameter of an end of the third connecting tube, which is near to the holding portion, is 1.85mm to 1.90mm.
Preferably, in the above-mentioned foreign body forceps for blood vessel, the outer circumferential material of the tube body is nylon or polyether block polyamide, and the inside is nested into a metal braided structure.
Preferably, in the above-mentioned foreign body forceps for blood vessel, the jaws are basket-shaped and are provided with engaging teeth.
Preferably, in the above-mentioned foreign matter forceps for use in blood vessels, the jaw is made of stainless steel, and a hydrophilic polymer is coated on the outside of the jaw.
According to the technical scheme, the invention provides the foreign matter forceps for blood vessels, which comprises a holding part, an extending part and a jaw, wherein the extending part is used for extending into the blood vessels to drive the jaw to enter the blood vessels and perform actions of catching the foreign matters in the blood vessels, particularly, a bending mechanism is arranged on the inner wall of the extending part, the bending 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, when the first connecting rod rotates around the second end of the first connecting rod as a circle center, the second connecting rod is driven to rotate by the hinge structure, so that the second end of the second connecting rod is driven to move towards the second end of the first connecting rod, the distance between the second end of the first connecting rod and the second end of the second connecting rod is shortened to cause the bending of the extending part at the position where the bending adjusting mechanism is arranged, the bending direction is the direction of the extending part towards the second end position of the first connecting rod, in order to realize the remote end operation of bending of the extending part, the first connecting rod is connected with a traction wire, the traction wire can pull the first connecting rod to rotate towards the direction away from the second connecting rod when being tensioned and drive the second end of the second connecting rod to move towards the second end of the first connecting rod, correspondingly, the holding part comprises a bending adjusting sliding seat, one end of the traction wire is connected with the first connecting rod, the other end of the traction wire is fixedly connected with the bending adjusting sliding seat, and the bending adjusting sliding seat is operated at the holding part to tension or release the traction wire so as to pull or release the first connecting rod, thereby enabling operators to conveniently and rapidly perform bending adjusting and correcting operations of the extending part. According to the foreign body forceps for blood vessels, the bending adjusting mechanism is arranged in the extending part and 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 the two hinged connecting rods, so that the extending part bends towards one side where the bending adjusting mechanism is arranged, when the extending part needs to drive the jaws to extend into blood vessels with larger bending angles, the extending part and the jaws can be prevented from damaging the inner wall of the blood vessels by operating the bending adjusting mechanism, the safety of an operation is improved, meanwhile, an operator can realize bending adjusting action of the extending part by operating the bending adjusting sliding seat at the far end, and drives the jaws to enter target blood vessels.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a pair of forceps for intravascular foreign bodies according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of the protrusions and jaws of the foreign body forceps for use in blood vessels according to the embodiment of the invention;
fig. 3 is a schematic view of a structure of a holding part of a foreign body forceps for use in a blood vessel according to an embodiment of the present invention;
fig. 4 is a detailed schematic structure diagram of a bending mechanism for an intravascular foreign body forceps according to an embodiment of the present invention;
fig. 5 is a schematic view of a tube body structure of a pair of forceps for intravascular foreign bodies according to an embodiment of the present invention;
FIG. 6 is a schematic view showing a structure of a jaw of a foreign body forceps for use in a blood vessel according to an embodiment of the present invention when the jaw is opened in the blood vessel;
fig. 7 is a schematic view of a bending state of an extension part of a foreign body forceps for use in a blood vessel according to an embodiment of the present invention;
wherein 10 is the extending part, 110 is the bending adjusting mechanism, 1110 is the first connecting rod, 1120 is the second connecting rod, 120 is the traction wire, 20 is the holding part, 210 is the bending adjusting slide seat, 2110 is the protruding part, 2120 is the first protruding part, 220 is the limiting plate, 2210 is the limiting groove, 230 is the adjusting spring, 240 is the traction handle, 30 is the jaw, 310 is the upper jaw, 320 is the lower jaw, 330 is the occluding tooth, 40 is the diamond connecting rod mechanism, 410 is the first endpoint, 420 is the second endpoint, 430 is the connecting wire, 50 is the chute, 60 is the pipe body, 610 is the first connecting pipe, 620 is the second connecting pipe, and 630 is the third connecting pipe.
Detailed Description
The core of the invention is to disclose a foreign body forceps for blood vessels, which is used for reducing the operation difficulty of the operation of taking out the foreign body in the blood vessels and improving the safety of taking out the foreign body in the blood vessels.
In order to better understand the solution of the present invention, the following description of the embodiments of the present invention refers to the accompanying drawings. Furthermore, the embodiments shown below do not limit the summary of the invention described in the claims. The whole contents of the constitution shown in the following examples are not limited to the solution of the invention described in the claims.
As shown in fig. 1-7, the foreign matter forceps for use in blood vessels provided in the embodiments of the present invention includes a holding portion 20, an inserting portion 10 and a jaw 30, where the jaw 30 is disposed at an end of the inserting portion 10 far away from the holding portion 20, so as to be driven by the inserting portion 10 to enter into the blood vessels and perform an action of capturing foreign matters in the blood vessels, and in order to perform bending adjustment on the inserting portion 10, bending of the jaw 30 is implemented and the inserting portion 10 can smoothly extend into the blood vessels with a large bending angle, particularly, as shown in fig. 2, a bending mechanism 110 is disposed on an inner wall of the inserting portion 10, in the first embodiment of the present invention, the bending mechanism includes a first link 1110 and a second link 1120, the first end of the first link 1120 and the first end of the second link 1120 are hinged, and simultaneously, the second end of the first link 1120 and the second end of the second link 1120 are fixedly disposed on the inner wall of the inserting portion 10 at a distance therebetween, and in a direction of the first link 1110 and the second link 1110 is driven by the first link 1120 and the first link 10, and the bending mechanism is driven by the first link 1120 and the second link 1120 is turned to the first end of the first link 10, and the bending mechanism is turned to the first link 10 and the second link is turned to the first end of the first link 1120 is turned to the first end of the first link 10, and the bending mechanism is turned to the first end of the second link is turned to the first link end of the first link end 1120 is turned to the first end and the first link end of the first link end is turned, and the second link end is turned, and the first end bending mechanism is turned, and the second end bending end is opposite the second end 10 is opposite the second end is opposite the second end side 10 is opposite 6 is opposite end side and the second end side.
In order to implement the motion operation of the bending mechanism 110, particularly, implement the distal end operation of the bending mechanism 110, as shown in fig. 3, in the foreign body forceps for use in blood vessels provided in the embodiment of the present invention, the first link 1110 is connected with the traction wire 120, when the traction wire 120 is pulled, the first link 1110 is pulled to rotate in a direction away from the second link 1120, and drives the second end of the second link 1120 to move toward the second end of the first link 1110, correspondingly, the holding portion 20 includes the bending slide 210, one end of the traction wire 120 is connected to the first link 1110, and the other end is fixedly connected to the bending slide 210, and by operating the bending slide 210 at the holding portion 20 to tighten or release the traction wire 120, so as to pull or release the first link 1110, the operator can perform the bending and aligning operation of the extension portion 10 conveniently and rapidly.
It should be noted that, in another embodiment of the present invention, in order to optimize the bending 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 extending portion 10, and thus, when the second end of the second link 1120 moves towards the second end of the first link 1110, the inner wall of the extending portion 10 can be tensioned more stably, and the bending effect of the extending portion 10 is ensured.
It should be further noted that, the extending portion 10 has a structure with a certain ductility, when extending into a blood vessel, the extending portion 10 can be continuously pushed in after bending the end portion thereof, so that after the bending adjustment slider 210 is operated to adjust the bending of the extending portion 10 by tightening the traction wire 120, the traction wire 120 can be loosened, and the bending adjustment operation can be performed again when the subsequent steering is required.
According to the foreign matter forceps for blood vessels, the bending adjusting mechanism 110 is arranged in the extending part 10, the bending adjusting mechanism 110 is driven by the traction 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 the 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 jaws 30 to extend into a blood vessel with a large bending angle, the extending part 10 and the jaws 30 can be prevented from damaging the inner wall of the blood vessel by operating the bending adjusting mechanism 110, the safety of an operation is improved, meanwhile, an operator can realize bending adjusting action of the extending part 10 by operating the bending adjusting sliding seat 210 at the far end, and drive the jaws 30 to enter a target blood vessel.
In the above embodiment, the extending portion 10 can bend towards the inner wall in the direction where the bending mechanism 110 is disposed, and the extending portion 10 is of a cylindrical structure, when the jaw 30 needs to be driven to enter the tortuous blood vessel and the extending portion 10 needs to be bent towards the specific direction, the operator can rotate the extending portion 10 to rotate the bending mechanism 110 towards the direction where bending is required to be performed, so as to achieve bending of the extending portion 10 towards the specific direction, but the operation will increase the operation difficulty, and further scratch the inner wall of the blood vessel due to improper operation, so that, in order to further optimize the above technical scheme, on the basis of the above embodiment, the extending portion 10 is provided with two or more bending mechanisms on the inner wall of the extending portion 10, so that when the extending portion 10 enters the blood vessel at a single angle, more bending directions are provided for the extending portion 10, that is, the extending portion 10 can bend towards any position where the bending mechanism 110 is disposed, and at the same time, preferably, two or more bending mechanisms 110 are disposed evenly along the extending portion 10 in the circumferential direction, so that the extending portion 10 is not required to rotate evenly, and the extending portion 10 is rotated towards the specific direction, and the bending mechanism 110 is not required to rotate evenly, and the bending mechanism 110 is disposed in the specific direction.
In the embodiment of the invention, the tensioning of the traction wire 120 by the bending slide 210 can be achieved in various ways, for example, the bending slide 210 slides to tension the traction wire 120, or the bending slide 210 rotates to wind and tension the traction wire 120, in the embodiment of the invention, as shown in fig. 4, the bending slide 210 slides to tension the traction wire 120 by sliding, in particular, the bending slide 210 slides along the first direction to tension the traction wire 120, in order to maintain the tension state of the traction wire 120 in the bending process, the bending slide 210 is further provided with a protruding part 2110, correspondingly, the holding part 20 is further provided with a limiting plate 220, and a plurality of limiting grooves 2210 are formed in the limiting plate 220 along the first direction to clamp the protruding part 2110 at a plurality of positions in the first direction, so as to limit the bending slide 210, maintain the tension state of the traction wire 120, preferably, the plurality of limiting grooves 2210 are formed at equal intervals on the limiting plate 220, and the equidistant limiting grooves 2210 can realize uniform adjustment of the tension state of the traction wire 120, which is more convenient for the operator to adjust the traction wire 120.
Further, in the foreign body forceps for use in blood vessels provided in the embodiment of the present invention, an adjusting spring 230 is further provided, two ends of the adjusting spring 230 respectively abut against the fixing areas of the bending adjustment sliding seat 210 and the holding portion 20, and meanwhile, the adjusting spring 230 is in a compressed state in the sliding process of the bending adjustment sliding seat 210 along the first direction, so as to assist the bending adjustment sliding seat 210 to return to the original position after the bending adjustment action of the extending portion is completed, and play a role in return.
In order to further optimize the above technical solution, a first protrusion 2120 is provided on the bending slide 210, where the first protrusion 2120 is used to be snapped into the inner ring of the adjusting spring 230 to improve the stability of the connection between the adjusting spring 230 and the bending slide 210, it should be noted that, preferably, a second protrusion is provided on the holding portion 20 in a fixing area for abutting against the adjusting spring 230, and the second protrusion is also snapped into the inner ring of the adjusting spring 230 to keep the adjusting spring 230 stable.
Further, in one embodiment of the present invention, the outer wall of the extension 10 is coated with a hydrophilic coating to avoid scratching the inner wall of the blood vessel by the outer wall of the extension 10.
Further, as shown in fig. 6 and 7, in the embodiment of the present invention, the jaw 30 is controlled to open and close, and the jaw 30 includes an upper jaw 310 and a lower jaw 320, and a diamond-shaped link mechanism 40 formed by hinging four links with the same length from end to end is disposed at the jaw 30, and the diamond-shaped link mechanism includes four end points, wherein the first end point 410 and the second end point 420 are opposite two end points, the first end point 410 is one end point far away from the jaw 30, the second end point 420 is one end point closest to the jaw 30, the first end point 410 is connected with a connecting wire 430, and when the first end point 410 is pulled by the connecting wire 430 to move away from the jaw 30, two links adjacent to the second end point 420 in the diamond-shaped link mechanism rotate around the second end point 420 and move towards each other with the second end point 420 as a pivot, the upper jaw 310, the lower jaw 320 and two connecting rods adjacent to the second end 420 form a lever structure, when the two connecting rods adjacent to the second end 420 rotate around the second end 420 and move oppositely, the upper jaw 310 and the lower jaw 320 are driven to move oppositely through the lever structure, namely when the first end 410 is pulled to move away from the second end 420 through the connecting wire 430, the upper jaw 310 and the lower jaw 320 move oppositely, so that the jaw 30 is closed, foreign matters in a blood vessel are caught through the jaw 30, and similarly, in order to reopen the jaw 30 after the jaw 30 fails to catch the foreign matters, the hinge positions of the two connecting rods adjacent to the second end 420 are hinge parts capable of providing a resetting effect, when the connecting wire 430 is loosened, the two connecting rods adjacent to the second end 420 rotate around the second end 420 and move oppositely, to drive the upper jaw 310 and the lower jaw 320 in a back-to-back motion, and the jaw 30 is opened in preparation for a subsequent opening motion.
Further, in order to realize the distal adjustment of the opening and closing actions of the jaws 30, the pulling handle 240 is slidably disposed on the holding portion 20, one end of the connecting wire 430 is fixedly connected with the pulling handle 240, the connecting wire 430 can be pulled by sliding the pulling handle 240, 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 disposed on the holding portion 20 can facilitate the operator to open and close the jaws 30, and it should be noted that the connecting wire 430 is a flexible wire.
Further, in an embodiment of the present invention, the diamond-shaped link mechanism 40 in the foreign body forceps for use in blood vessels is disposed in the chute 50, so that each link in the diamond-shaped link mechanism 40 is in the chute 50, i.e. can move in the same plane, thereby maintaining the stability of movement of the diamond-shaped link mechanism 40 and ensuring the smoothness of the opening and closing process of the jaws 30.
Further, in the foreign body forceps for use in blood vessels 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 enable the insertion portion 10 to have a sufficient extension length, 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 pipe body 60 includes a first connecting pipe 610, a second connecting pipe 620 and a third connecting pipe 630 that are sequentially sleeved and have sequentially reduced outer diameters, it should be noted that, here, the sequential sleeved specific means that the first connecting pipe 610 is sleeved on the outer circumference of the connecting pipe, the second connecting pipe 620 is sleeved on the outer circumference of the third connecting pipe 630, and the configuration of any connecting pipe is a hollow round platform configuration, that is, the section diameter of a single connecting pipe is in a gradual change form, and the end of the single connecting pipe far away from the holding portion 20 is one end with smaller round surface size on the round platform, the diameters of the two sleeved connecting pipes are matched, and the diameter of the two sleeved connecting pipes is matched, specifically, when any connecting pipe stretches out to the maximum stretching distance, the end of the two sleeved connecting pipes is clamped and fixed by another connecting pipe sleeved outside the connecting pipe, thereby forming a structure similar to a fishing rod, and enabling the stretching portion to obtain a sufficient extending length.
The tube body 60 may have a structure having a plurality of connection tubes according to actual operation needs.
Further, in an embodiment of the present invention, the inner diameter of the end of the first connecting tube 610 far from the holding portion 20 is 2.10mm-2.15mm, the outer diameter of the end of the second connecting tube 620 near the holding portion 20 is 2.15mm-2.20mm, when the second connecting tube 620 extends out of the first connecting tube 610, the end of the second connecting tube 620 near the holding portion 20 is clamped by the 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, meanwhile, the inner diameter of the end of the second connecting tube 620 far from the holding portion 20 is 1.80mm-1.85mm, and the outer diameter of the end of the third connecting tube 630 near the holding portion 20 is 1.85mm-1.90mm, so as to achieve the same effects as the above.
Further, in an embodiment of the present invention, the outer circumference of the tube 60 is made of nylon or polyether block polyamide, and the inner sleeve is made of metal braid, so that the tube 60 has a certain ductility and has an integral strength enough for the operator to push.
In addition, as with the extension 10, the outer circumference of the tube body 60 is also preferably coated with a hydrophilic coating to prevent the tube body 60 from scratching the blood vessel.
Further, in order to ensure the capturing effect of the jaw 30 on the foreign matters in the blood vessel, in an embodiment of the invention, the jaw 30 is basket-shaped, and the jaw 30 is relatively 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 hydrophilic polymer is coated on the outer portion of the jaw 30 to improve safety when the jaw 30 captures foreign matters.
The terms first, second, left and right in the description and the claims of the present invention and in the above-described drawings, etc. are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to the listed steps or elements but may include steps or elements not expressly 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 pair of endovascular foreign body forceps, comprising:
the blood vessel stretching device comprises a stretching-in part (10) used for stretching into a blood vessel, wherein a bending mechanism (110) is arranged on the inner wall of the stretching-in part (10), the bending mechanism comprises a first connecting rod (1110) and a second connecting rod (1120), a first end of the first connecting rod (1110) is hinged with 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 stretching-in part (10), 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 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 as to drive the stretching-in part (10) to bend towards one side of the blood vessel where the bending mechanism (110) is arranged;
a holding part (20) comprising a bending slide seat (210), wherein the bending 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 of the extending part (10) far away from the bending slide seat (210) and is used for capturing foreign matters in blood vessels.
2. The pair of intravascular foreign matter forceps according to claim 1, wherein two or more bending adjustment mechanisms (110) are provided on an inner wall of the insertion portion (10), and the two or more bending adjustment mechanisms (110) are uniformly provided along a circumferential direction of the insertion portion (10).
3. The pair of intravascular foreign body forceps according to claim 1, wherein the bending adjustment slide (210) slides along a first direction to tighten the traction wire (120), a protruding portion (2110) is arranged on the bending adjustment slide (210), a limiting plate (220) is further arranged on the holding portion (20), a plurality of limiting grooves (2210) are formed in the limiting plate (220) at equal intervals along the first direction, and the limiting grooves (2210) are used for clamping the protruding portion (2110) at a plurality of positions in the first direction to adjust the tightening degree of the bending adjustment slide (210) on the traction wire (120).
4. A pair of endovascular foreign body forceps according to claim 3, further comprising an adjustment spring (230), wherein two ends of the adjustment spring (230) abut against fixed areas of the bending slide (210) and the grip (20), respectively, and wherein the adjustment spring (230) is in a compressed state during sliding of the bending slide (210) in the first direction.
5. The pair of intravascular foreign body forceps according to claim 4, wherein the bending slide (210) is provided with a first protrusion (2120) for engaging an inner ring of the adjusting spring (230).
6. The forceps for intravascular use as defined in claim 1, wherein the outer wall of the penetration portion (10) is coated with a hydrophilic coating.
7. The pair of intravascular foreign body forceps according to claim 1, wherein the jaw (30) comprises an upper forceps piece (310) and a lower forceps piece (320), a diamond-shaped connecting rod mechanism (40) formed by hinging four connecting rods with the same length end to end in sequence is arranged at the jaw (30), a connecting wire (430) is connected to a first end point (410) of the diamond-shaped connecting rod mechanism (40), a second end point (420) of the diamond-shaped connecting rod 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 piece (310), the lower forceps piece (320) and two connecting rods adjacent to the second end point (420) form a lever structure;
the upper jaw (310) and the lower jaw (320) move toward each other when the connecting wire (430) pulls the first end point (410) away from the second end point (420).
8. The pair of endovascular foreign body forceps according to claim 7, wherein the gripping portion (20) is slidably provided with a pulling handle (240), the pulling handle (240) is fixedly connected to one end of the connecting wire (430), and the pulling handle (240) is slid to pull the connecting wire (430) and to pull the first end point (410) away from the second end point (420) via the connecting wire (430).
9. The endovascular foreign body forceps of claim 7, wherein the diamond-shaped linkage (40) is disposed within a chute (50).
10. The pair of intravascular foreign body forceps according to claim 1, wherein the insertion 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 pair of intravascular foreign body forceps according to claim 10, wherein 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, the single connection tube is in a hollow round table configuration, one end far away from the holding portion (20) is an end with a smaller round surface size on the round table, and the single connection tube is clamped and fixed by the other connection tube sleeved outside the single connection tube when the single connection tube is extended to a maximum extension distance.
12. The pair of endovascular foreign body forceps according to claim 11, wherein the first connecting tube (610) has an inner diameter of 2.10mm to 2.15mm at an end remote from the grip portion (20), the second connecting tube (620) has an outer diameter of 2.15mm to 2.20mm at an end near the grip portion (20), the inner diameter of 1.80mm to 1.85mm at an end remote from the grip portion (20), and the third connecting tube (630) has an outer diameter of 1.85mm to 1.90mm at an end near the grip portion (20).
13. The pair of endovascular foreign body forceps according to claim 10, wherein the tubular body (60) is nylon or polyether block polyamide, and is internally nested in a metallic braid structure.
14. The endovascular foreign body forceps according to claim 1, wherein the jaws (30) are basket-shaped and the jaws (30) are oppositely provided with engagement teeth (330).
15. The pair of endovascular foreign body forceps according to claim 1, wherein the jaws (30) are of stainless steel material and the jaws (30) are externally 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 CN115778493A (en) | 2023-03-14 |
| CN115778493B true CN115778493B (en) | 2023-10-20 |
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| JP6653044B2 (en) * | 2017-03-24 | 2020-02-26 | 株式会社メディカロイド | Surgical instruments and systems |
| EP4333738A1 (en) * | 2021-05-06 | 2024-03-13 | The Cleveland Clinic Foundation | Articulated endoscopic instrument |
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| DE10159584A1 (en) * | 2001-12-05 | 2003-06-18 | Herbert Maslanka | Bendable endoscopic surgical instrument has actuator cable with permanently bendable stainless steel tube between core and jacket, to prevent undesired tool movement |
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| Publication number | Publication date |
|---|---|
| CN115778493A (en) | 2023-03-14 |
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