Femoral artery cannulation to provide lower limb blood perfusion

Abstract

A femoral artery cannulation for providing lower limb blood perfusion includes an outer tube and an inner tube, the inner tube being fixedly fitted inside the outer tube, a plurality of through-holes formed on the lower surface of the outer tube, communication grooves formed on the upper outer surfaces of both the outer and inner tubes, slide bars fixedly provided on both ends of the lower sides of the two communication grooves, a slide plate movably adjusted between the two slide bars, infusion tubes fixedly fitted inside either of the slide plates, a transmission mechanism for pressing the infusion tubes to move them, and a blocking mechanism provided outside the communication grooves. This device allows the infusion tubes to be stored within the cannulation and removed when in use, thereby minimizing contamination of the infusion tubes.

Description

[Technical Field]

[0001] The present invention relates to the field of medical devices, and more particularly to femoral artery cannulation for providing lower limb blood perfusion. [Background technology]

[0002] Femoral artery cannulation can block blood flow from the femoral artery to the lower limb, potentially causing ischemia of the lower limb, which may require amputation if the ischemia is severe.

[0003] Patent publication number CN214911437U discloses a VA-ECMO femoral artery cannulation system for providing lower limb blood perfusion. It includes a cannulation body and a puncture guide core, with a main chamber and a side chamber formed within the cannulation body, the main chamber having a penetrating structure from front to back, with a main chamber side hole drilled along the outer edge of the anterior end of the main chamber, the side chamber surrounding the periphery of the posterior end of the main chamber, and side chamber side holes drilled along the outer edge of the side chamber along the same longitudinal line. An annular airbag is provided in the cannulation body between the main chamber side hole and the side chamber side hole, and a raised airbag is provided at the extension of the posterior end of the side chamber side hole, with airbag ports connected to both the annular airbag and the raised airbag for filling and releasing air. However, this technical solution still has deficiencies.

[0004] In this technical solution, the infusion tube is directly exposed to the outside, which makes it easy for bacteria to adhere to it during storage and easily leads to infection of the injected blood during the injection process. Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention aims to provide a femoral artery cannulation for providing lower limb blood perfusion, which solves the problems of the prior art in which the infusion tube in VA-ECMO femoral artery cannulation for providing lower limb blood perfusion is directly exposed to the outside, making it prone to bacterial adhesion during storage and prone to infecting the infused blood during the infusion process. [Means for solving the problem]

[0006] To achieve the above object, the present invention employs the following technical solution.

[0007] A femoral artery cannulation system for providing lower limb blood perfusion includes an outer tube and an inner tube, wherein the inner tube is fixedly fitted inside the outer tube, a plurality of through holes are formed in the lower surface of the outer tube, communication grooves are formed on both the outer and inner tubes' upper outer surfaces, slide bars are fixedly provided on both ends of the lower sides of the two communication grooves, a slide plate is movably adjusted between the two slide bars, an infusion tube is fixedly fitted inside either of the slide plates, a transmission mechanism is provided on the underside of the two slide plates for pressing to move the infusion tube, and a blocking mechanism is provided outside the communication groove.

[0008] Preferably, the transmission mechanism includes a rotating rod and a cam, the rotating rod is disposed under the sliding plate, both ends of the rotating rod are rotatably connected to the side walls of the corresponding outer and inner tubes via sealed bearings, the cam is fixedly fitted to the outer wall of the rotating rod and abuts the lower surface of the sliding plate, one ends of the two rotating rods extend outside the corresponding outer and inner tubes, respectively, and a worm wheel is fixedly fitted to one side of the worm wheel, a worm gear is meshed with one side of the worm wheel, side plates are rotatably connected to both ends of the worm gear, and the multiple side plates are fixedly connected to the outer walls of the corresponding outer and inner tubes, respectively.

[0009] Preferably, the blocking mechanism includes a blocking plate and an engaging block, the blocking plate is arranged to abut the outside of the communicating groove, one end of the two blocking plates is fixedly connected to the outer walls of the corresponding outer tube and inner tube via connecting strips, the engaging block is fixedly arranged at one end away from the connecting strip of the corresponding blocking plate, an engaging groove is opened in either of the outer walls of the outer tube and inner tube on one side close to the engaging block, and the engaging block is engaged with the corresponding engaging groove.

[0010] Preferably, springs are movably fitted to the rod walls of all of the slide bars, and both ends of the springs are fixedly connected to the outer walls of the corresponding slide plates, outer tubes and inner tubes.

[0011] Preferably, a stopper is fixedly provided at each of the lower ends of the plurality of slide bars.

[0012] Preferably, a rotating wheel is fixedly fitted to one end of each of the two worm gears.

[0013] Preferably, the closure plate, connecting strip and engagement block are all made of antibacterial silica gel material. [Effects of the Invention]

[0014] Compared with the prior art, the present invention provides femoral artery cannulation to provide lower limb blood perfusion, with the following beneficial effects:

[0015] 1. The femoral artery cannulation that provides lower limb blood perfusion normally houses the infusion tube within the cannulation, thereby minimizing contamination of the infusion tube. By rotating the worm gear to rotate the worm wheel, the rotating rod rotates the cam, allowing the infusion tube to be pushed out of the cannulation, making it easy to use.

[0016] 2. The femoral artery cannulation that provides blood perfusion in the lower limbs is provided with a blocking plate that abuts against the outer wall of the communicating groove, which can block and protect the inside of the cannulation under normal conditions and effectively prevent foreign matter from entering the cannulation.

[0017] Any unmentioned parts of the device can be realized in the same way as or by adopting conventional technology, and the present invention stores the infusion tube within the cannulation and can remove it when in use, thereby preventing the infusion tube from becoming contaminated as much as possible. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a structural schematic diagram of a femoral artery cannulation for providing lower limb blood perfusion according to the present invention. FIG. [Figure 2] FIG. 2 is a schematic diagram of the overall structure of FIG. [Figure 3] FIG. 2 is an enlarged schematic view of the structure of part A in FIG. [Figure 4] FIG. 3 is an enlarged schematic view of the structure of part B in FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0019] 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. Obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments.

[0020] In describing the present invention, it should be understood that the orientations or positional relationships indicated by terms such as "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," etc. are orientations or positional relationships based on the drawings and are merely for the purpose of easily describing or simplifying the description of the present invention, and do not indicate or imply that the designated devices or elements must necessarily have a particular orientation or be configured or operated in a particular orientation, and should not be understood as limitations on the present invention.

[0021] 1 to 4, a femoral artery cannulation for providing lower limb blood perfusion includes an outer tube 1 and an inner tube 2, the inner tube 2 is fixedly fitted inside the outer tube 1, a plurality of through holes 3 are drilled on the lower surface of the outer tube 1, communication grooves are provided on both the outer upper surfaces of the outer tube 1 and the inner tube 2, slide bars 4 are fixedly provided on both ends of the lower side of the two communication grooves, a slide plate 5 is movably adjusted between the two slide bars 4, an infusion tube 6 is fixedly fitted inside each of the slide plates 5, a transmission mechanism is provided on the underside of the two slide plates 5 for pressing to move the infusion tube 6, and a blocking mechanism is provided outside the communication groove.

[0022] The transmission mechanism includes a rotating rod 7 and a cam 8. The rotating rod 7 is installed under the sliding plate 5, and both ends of the rotating rod 7 are rotatably connected to the side walls of the corresponding outer tube 1 and inner tube 2 via sealed bearings. The cam 8 is fixedly fitted to the outer wall of the rotating rod 7 and abuts the lower surface of the sliding plate 5. One ends of the two rotating rods 7 extend outside the corresponding outer tube 1 and inner tube 2, and a worm wheel 9 is fixedly fitted to one side of the worm wheel 9. A worm gear 11 is meshed with one side of the worm wheel 9. Side plates 10 are rotatably connected to both ends of the worm gear 11, and the multiple side plates 10 are fixedly connected to the outer walls of the corresponding outer tube 1 and inner tube 2, respectively.

[0023] The blocking mechanism includes a blocking plate 15 and an engaging block 17, the blocking plate 15 is arranged to abut against the outside of the communicating groove, one end of the two blocking plates 15 is fixedly connected to the outer wall of the corresponding outer pipe 1 and inner pipe 2 via a connecting strip 16, the engaging block 17 is fixedly arranged at one end of the corresponding blocking plate 15 away from the connecting strip 16, and an engaging groove is opened in both the outer wall of the outer pipe 1 and the inner pipe 2 on one side near the engaging block 17, and the engaging block 17 is engaged with the corresponding engaging groove.

[0024] A spring 13 is movably fitted to each of the rod walls of the multiple slide bars 4, and both ends of the multiple springs 13 are fixedly connected to the outer walls of the corresponding slide plate 5, outer tube 1 and inner tube 2, respectively, so that the slide plate 5 can return the infusion tube 6 to its original position, making it easier to accommodate it in the cannulation.

[0025] A stopper 14 is fixedly provided at each of the lower ends of the plurality of slide bars 4 to prevent the slide plate 5 from coming off the rod wall of the slide bar 4 as much as possible.

[0026] A rotating wheel 12 is fixedly fitted to one end of each of the two worm gears 11, making it easy to rotate the worm gears 11.

[0027] The closing plate 15, the connecting strip 16 and the engaging block 17 are all made of antibacterial silica gel material, which is easy to open and has excellent antibacterial performance.

[0028] In the present invention, during use, the infusion tube 6 is normally housed within the cannulation, thereby minimizing contamination of the infusion tube. A blocking plate 15 is provided in abutment against the outer wall of the communicating groove, which normally blocks and protects the inside of the cannulation, effectively preventing foreign matter from entering the cannulation. When connection is required, the worm gear 11 is rotated to turn the worm wheel 9, which causes the rotating rod 7 to rotate the cam 8, pushing the infusion tube 6 out of the cannulation and facilitating connection. After connection to the external transfusion vessel, blood is transfused from the inner tube 2 to the proximal end of the femoral artery, and then from the through-hole in the side wall of the outer tube 1 to the distal end of the femoral artery, thereby enabling blood to be infused into the lower limb and preventing ischemia in the lower limb.

[0029] The above are merely preferred embodiments of the present invention, and the protection scope of the present invention is not limited to these. Any equivalent substitutions and modifications made by those skilled in the art based on the technical solutions and inventive ideas of the present invention within the technical scope disclosed in the present invention shall be covered within the protection scope of the present invention. [Explanation of symbols]

[0030] 1 outer tube 2 Inner tube 3 Through holes 4 Slider 5 Slide plate 6 Liquid injection tube 7 Rotating Rod 8 Cam 9 Worm Wheel 10 Side Panel 11 Worm Gear 12 Rotating Wheels 13 Spring 14 Stopper 15 Occlusion plate 16 connection strips 17 Engagement block

Claims

1. A femoral artery cannulation for lower limb blood perfusion comprising an outer tube (1) and an inner tube (2), wherein the inner tube (2) is fixedly fitted inside the outer tube (1), a plurality of through holes (3) are formed in the lower surface of the outer tube (1), communication grooves are formed in the upper outer surfaces of both the outer tube (1) and the inner tube (2), slide bars (4) are fixedly provided at both ends of the lower sides of the two communication grooves, slide plates (5) are movably adjusted between the two slide bars (4), infusion tubes (6) are fixedly fitted inside either of the slide plates (5), a transmission mechanism is provided on the underside of the two slide plates (5) for pressing to move the infusion tubes (6), and an occlusion mechanism is provided outside the communication grooves.

2. The transmission mechanism includes a rotating rod (7) and a cam (8), the rotating rod (7) is provided under the slide plate (5), both ends of the rotating rod (7) are rotatably connected to the side walls of the corresponding outer tube (1) and inner tube (2) via seal bearings, the cam (8) is fixedly fitted to the outer wall of the rotating rod (7), the cam (8) abuts on the lower surface of the slide plate (5), and one end of each of the two rotating rods (7) is connected to the corresponding outer tube (1) and inner tube (2).

2. A femoral artery cannulation system for providing lower limb blood perfusion according to claim 1, characterized in that the cannulation member extends outside the outer tube (1) and the inner tube (2) and has a worm wheel (9) fixedly fitted thereto, a worm gear (11) is provided on one side of the worm wheel (9) in mesh with the worm wheel (9), side plates (10) are rotatably connected to both ends of the worm gear (11), and a plurality of the side plates (10) are fixedly connected to the outer walls of the corresponding outer tube (1) and inner tube (2), respectively.

3. 2. A femoral artery cannulation system for providing lower limb blood perfusion according to claim 1, characterized in that the occlusion mechanism includes an occlusion plate (15) and an engagement block (17), the occlusion plate (15) is arranged to abut the outside of the communicating groove, one end of each of the two occlusion plates (15) is fixedly connected to the outer walls of the corresponding outer tube (1) and inner tube (2) via a connecting strip (16), the engagement block (17) is fixedly arranged at one end of the corresponding occlusion plate (15) away from the connecting strip (16), an engagement groove is opened in each of the outer walls of the outer tube (1) and inner tube (2) on one side closer to the engagement block (17), and the engagement block (17) is engaged with the corresponding engagement groove.

4. 2. A femoral artery cannulation system for providing lower limb blood perfusion as described in claim 1, characterized in that a spring (13) is movably fitted to each of the rod walls of the plurality of slide bars (4), and both ends of the plurality of springs (13) are fixedly connected to the outer walls of the corresponding slide plates (5), outer tubes (1) and inner tubes (2).

5. 2. A femoral artery cannulation system for providing lower limb blood perfusion according to claim 1, wherein a stopper (14) is fixedly provided at each of the lower ends of the plurality of slide bars (4).

6. 3. A femoral artery cannulation for providing lower limb blood perfusion according to claim 2, characterized in that a rotating wheel (12) is fixedly fitted to one end of each of the two worm gears (11).

7. 4. The femoral artery cannulation for providing lower limb blood perfusion according to claim 3, wherein the occlusion plate (15), the connecting strip (16) and the engagement block (17) are all manufactured using antibacterial silica gel material.

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