CN211158065U - Multifunctional micro-catheter for coronary blood flow guidance and drug injection - Google Patents

Abstract

The utility model discloses a multi-functional little pipe of coronary artery blood flow guide and medicine injection, including the body, the head of body is equipped with a plurality of canals, and pore and sharp tube section all communicate with the body, and each pore distributes along the length direction of body, and all is equipped with certain angle between adjacent canal. The utility model provides a multi-functional little pipe of coronary artery blood flow guide and medicine injection, utilize a plurality of pore canals can lead into the blood flow of patient's near-end coronary artery in stretching into the distal end pore canal, the blood flow flows to the distal end blood vessel through the pore canal, through adjusting the flow of the distal end blood flow of the control occlusion blood vessel of the depth of stretching into of little pipe, the myocardial injury of reperfusion is reduced as far as possible; the inner diameter of the tip section is larger than the outer diameter of the steel wire, so that blood flow can also flow to a far-end blood vessel through a pore passage of the tip section; the micro-catheter and the steel wire can be simultaneously guided into the far end of the occluded blood vessel, so that the time of a house ball at the center of chest pain can be prolonged, and the emergency treatment efficiency is improved.

Description

Multifunctional micro-catheter for coronary blood flow guidance and drug injection

Technical Field

The utility model belongs to the technical field of medical instrument, especially relate to a multi-functional little pipe of coronary artery blood flow guide and medicine injection.

Background

When a patient with acute myocardial infarction is subjected to emergency stent treatment, a large amount of fresh blood flows to infarcted myocardium after the saccule expands an occluded blood vessel, serious reperfusion myocardial injury, sometimes even fatal, often fatigues to deal with various subsequent emergency situations to interrupt the operation once serious reperfusion injury occurs, and the opened blood vessel is often blocked by the saccule again, so that the risk of emergency operation is obviously increased, and the operation progress of an operator is influenced. After the occluded blood vessel is expanded, a large amount of fragments of the thrombus at the occluded part can flow to a far-end vascular bed along with the blood flow to block the micro blood vessel, so that no backflow is caused, meanwhile, in order to reduce reperfusion myocardial damage and no backflow, an operator often slowly opens the occluded blood vessel, and a person often punctures a balloon for expansion, and a certain medicine for preventing reperfusion damage and no backflow is directly pushed into the far end of the occluded blood vessel through the ruptured balloon, so that the method is clumsy and inefficient.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a multi-functional little pipe of coronary artery blood flow guide and medicine injection through the pore that sets up different positions, leads the blood flow of near-end coronary artery to the distal end, for the myocardium blood supply of infarction, lets the cardiomyocyte of infarction adapt to the reply of blood flow gradually, reduces reperfusion myocardial damage.

The utility model provides a multi-functional little pipe of coronary artery blood flow guide and medicine injection, includes the body, the head end of body is equipped with the tip section, the hole aperture of tip section is greater than the external diameter of steel wire, the head of body is equipped with a plurality of canals, the canal with the tip section all with the body intercommunication, each the canal is followed the length direction of body distributes, and adjacent all be equipped with certain angle between the canal.

Above technical scheme is preferred, the head of body is equipped with 3 the pore is first pore, second pore and third pore way respectively, first pore distance is 3-8mm apart from the distance of the head end of sharp tube section, the second pore distance is 25-35mm apart from the distance of the head end of sharp tube section, third pore distance is 35-50mm apart from the distance of the head end of sharp tube section.

Preferably, in the above technical solution, the adjacent pore channels are arranged at an interval of 90 °.

Above technical scheme is preferred, body is close to its tail end part and is connected with the medicine input tube, the medicine input tube with the body intercommunication, the tail end of medicine input tube is equipped with luer and connects for connect injection equipment.

Preferably, the included angle between the medicine input tube and the tube body is 25-45 degrees.

Above technical scheme is preferred, the tail end of body is equipped with the end cap of dismantling the connection, the center department of end cap is equipped with sealed post, the center of sealed post is equipped with the steel wire through-hole, sealed post stretches into the center in the interior hole of body is equipped with the steel wire through-hole.

Above technical scheme is preferred, the external diameter of sealing post with the hole diameter of body suits, the internal diameter of body is 0.8-0.9 mm.

Above technical scheme is preferred, the hole of sharp tube section is the bell mouth, the big end of hole is located the tail end, and the tip is located the head end.

Preferably, in the technical scheme, the outer diameter of the head end of the sharp pipe section is 0.8-0.9mm, and the inner diameter is 0.6-0.68 mm; the external diameter of the tail end of the sharp pipe section is 1-1.3mm, and the internal diameter is 0.7-0.8 mm.

Preferably, the outer surface of the 2/5-3/5 pipe body at the head end of the pipe body and the outer surface of the tip section are both provided with hydrophilic coatings, and the inner surface is provided with a braided layer.

The utility model has the advantages and positive effects that: the utility model provides a multi-functional little pipe of coronary artery blood flow guide and medicine injection, the head of body is equipped with a plurality of tunnels, the steel wire stretches into little pipe and drives little pipe and stretch into the distal end of the occluded coronary artery blood vessel, utilize a plurality of tunnels can lead into the distal end tunnel with the blood flow of patient's near-end coronary artery in stretching into the in-process, the blood flow flows to the distal end blood vessel through the tunnel, through the flow of the distal end blood flow of the occlusion blood vessel of depth control occlusion of stretching into of adjusting little pipe, reduce reperfusion cardiac muscle damage as far as possible; the inner diameter of the tip section is larger than the outer diameter of the steel wire, so that blood flow can also flow to a far-end blood vessel through a pore passage of the tip section; the micro-catheter and the steel wire can be simultaneously guided into the far end of the occluded blood vessel, so that the time of a house ball at the center of chest pain can be prolonged, and the emergency treatment efficiency is improved.

Drawings

Fig. 1 is a front view of a microcatheter according to an embodiment of the present invention;

fig. 2 is a top view of a microcatheter according to an embodiment of the present invention;

FIG. 3 is a half-sectional view of FIG. 1;

fig. 4 is a cross-sectional view of a plug according to an embodiment of the present invention.

Wherein: 1. a pipe body; 2. a tip section; 3. a drug delivery tube; 4. a luer fitting; 5. a plug; 6. a steel wire; 11. a first duct; 12. a second duct; 13. a third porthole; 51. Sealing the column; 52. and a steel wire through hole.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The occlusion part is generally positioned at the far end of the occlusion coronary artery blood vessel, and the near end of the occlusion coronary artery blood vessel has blood flow, in order to prevent the coronary artery from having no backflow and reperfusion injury to the maximum extent, the embodiment provides a coronary artery blood flow guiding and drug injection multifunctional microcatheter, which comprises a tube body 1, wherein one end of the tube body 1 close to an operator is the near end of the occlusion coronary artery blood vessel and is also the tail end of the tube body 1, one end of the tube body 1 far away from the operator is the far end of the occlusion coronary artery blood vessel and is also the head end of the tube body 1, as shown in fig. 1-3, the head end of the tube body 1 is provided with a sharp tube section 2, namely, the outer diameter of the sharp tube section 2 is gradually increased along the direction from the head end; the inner diameter of the sharp pipe section 2 is larger than the outer diameter of the steel wire, so that blood at the proximal end of the occluded blood vessel can conveniently flow out of the pore canal of the sharp pipe section 2 to the distal end of the occluded blood vessel; the head of body 1 is equipped with a plurality of pore, and pore and sharp pipeline section 2 all communicate with body 1, and each pore distributes along the length direction of body 1, and all is equipped with certain angle between the adjacent pore. Preferably, the adjacent channels are arranged at 90 ° intervals. The angle may also be 30 °, 45 °, 60 °, etc. The setting of angle can avoid behind a pore subsides the vascular wall, thereby it introduces the blood flow to little pipe that another pore does not paste the vascular wall.

Preferably, the head of the tube body 1 is provided with 3 holes, namely a first hole 11, a second hole 12 and a third hole 13. The first pore passage, the second pore passage and the third pore passage are all oval holes or round holes. In fig. 1, the head end of the tip pipe section is point a, the axis of the first duct is point B, the axis of the second duct is point C, and the axis of the third duct is point D. The second pore canal of the point C is vertical to the first pore canal of the point B; the third port at point D is perpendicular to the second port at point C and in the same plane as the first port at point B, but the first port and the third port are located on both sides of the axis of the body. The distance between the first duct 11 and the head end of the sharp pipe section 2 is 3-8mm, and the preferred distance is 5 mm; the distance between the second duct 12 and the head end of the sharp pipe section 2 is 25-35mm, and the preferred distance is 30 mm; the third bore 13 is located at a distance of 35-50mm, preferably 40mm, from the head end of the spike tube section 2. The distance is set to ensure that when in use, the inner hole channel and the first channel 11 of the tip section 2 are positioned at the far end of the occlusion coronary artery, the second channel 12 and the third channel 13 are positioned at the near end of the occlusion coronary artery, blood at the near end of the blood vessel flows into the micro-catheter from the second channel 12 and/or the third channel 13 and flows out from the inner hole channel and/or the first channel 11 of the tip section 2 to the far end of the blood vessel, and myocardial tissue of the occlusion blood vessel at the far end is gradually adapted to fresh blood. The number of cells may also be 4, 5 or more.

The body 1 is close to its tail end part and is connected with medicine input tube 3, and medicine input tube 3 and body 1 intercommunication, the tail end of medicine input tube 3 are equipped with luer 4 for connect the injection equipment. The luer connector 4 is a standard 6% luer conical connector with a funnel-shaped structure, can be matched with the existing standard syringe and a screw syringe, and can inject a drug capable of expanding micro-vessels and preventing thrombosis from the tail end of the drug input tube 3 to the far end of the coronary artery occlusion vessel so as to fully pre-treat the occluded coronary artery and even pump a thrombolytic drug by a micro pump to carry out intracoronary thrombolysis. The micro catheter is provided with a medicine input tube 3, the medicine input tube 3 can be specially responsible for injecting medicine for preventing backflow into the coronary artery to the far end of the occlusion blood vessel, and the first pore canal 11, the second pore canal 12 and the third pore canal 13 are combined, so that blood flow can flow to the far end of the occlusion blood vessel when medicine is injected into the coronary artery, and therefore, an operator can perform pretreatment on the coronary artery at ease. Before coronary artery dilation is carried out and the stent is implanted, blood flow flows to a far-end vascular bed in a proper amount, infarcted myocardial cells are gradually adapted to the recovery of the blood flow, and no reflow and reperfusion injury of the coronary artery are prevented to the maximum extent. The included angle between the medicine input tube and the tube body is 25-45 degrees, and the preferred included angle is 30 degrees.

In order to guarantee the sealing performance of the tail end of the tube body 1 during medicine injection, the tail end of the tube body 1 is provided with a plug 5 which is detachably connected, the plug and the tail end of the tube body can be in threaded connection, and the plug can also be directly pushed into the tail end of the tube body. As shown in fig. 4, the plug is in threaded connection with the tail end of the tube body, a sealing post 51 is arranged at the center of the plug 5, a steel wire through hole 52 is arranged at the center of the sealing post, and the sealing post extends into the tube body to realize sealing. The outer diameter of the sealing column in the embodiment is 0.8-0.9mm, preferably 0.85 mm; the outer diameter of the sealing column is adapted to the inner diameter of the pipe body, namely the inner diameter of the pipe body is 0.8-0.9mm, preferably 0.85 mm; the size of steel wire through-hole suits with the external diameter of steel wire, and the steel wire through-hole internal diameter is 0.45mm in this embodiment. One end of the steel wire through hole penetrates through the steel wire through hole and extends into the pipe body, and the other end of the steel wire through hole is reserved outside the plug. When injecting the medicine, withdraw the steel wire to the right-hand member of first pore 11, play the effect of closing near-end body and end cap, can prevent that the medicine of infusing from the body and the end cap outflow on right side.

Usually, 2/5-3/5 tube body 1 at the head end of the tube body 1 enters the blood vessel, so that the outer surfaces of 2/5-3/5 tube body 1 at the head end of the tube body 1 and the outer surface of the tip section 2 are both provided with hydrophilic coatings, the friction coefficient of the whole microcatheter is greatly reduced, and the microcatheter is more convenient to enter the blood vessel. The hydrophilic coating can be made of Ultraviolet (UV) hydrophilic coating, can improve the conductivity of the microcatheter in blood vessels, and simultaneously reduces tissue damage and pain of patients. The outer surface of the 2/5-3/5 at the head end of the pipe body 1 and the inner surface of the sharp pipe section 2 are provided with braided layers. The braided layer is a stainless steel braided layer or a nickel-titanium braided layer, and tensile strength of the micro catheter can be enhanced. The total length of the micro-catheter in the embodiment is 1200-1600 mm; the outer surface of the 600-900mm microcatheter at the head end is provided with a hydrophilic coating, and the inner surface is provided with a braided layer. The total length from the head end of the sharp pipe section to the tail end of the pipe body is 1300mm preferably; the 700mm outer surface of the microcatheter at the head end is provided with a hydrophilic coating, and the remaining 600mm is free of the hydrophilic coating. The inner hole of the sharp pipe section is a conical hole, the large end of the inner hole is positioned at the tail end, and the small end of the inner hole is positioned at the head end. The external diameter of the head end of the sharp pipe section is 0.8-0.9mm, preferably 0.85mm, and the internal diameter is 0.6-0.68mm, preferably 0.65 mm; the external diameter of the tail end of the sharp pipe section is 1-1.3mm, preferably 1.1mm, and the internal diameter is 0.7-0.8mm, preferably 0.75 mm. The pipe body is provided with a marker close to the sharp pipe section.

The working process of the embodiment: when an emergency operation is performed on a patient suffering from acute myocardial infarction, the tip section 2 and the first pore canal 11 of the microcatheter are sent to the far end of the occluded blood vessel by carrying the microcatheter by a steel wire, and the second pore canal 12 and the third pore canal 13 are left at the near end of the occluded blood vessel, so that blood flow at the near end of coronary artery can be introduced into the microcatheter from the second pore canal 12 and/or the third pore canal 13 and can be introduced into the far end blood vessel from the tip section 2 and/or the first pore canal 11 of the microcatheter. The second channel 12 and the third channel 13 are perpendicular to each other, so that it is avoided that one channel can introduce blood flow into the micro-catheter after the other channel is attached to the blood vessel. Finally, the blood flow of the far-end blood vessel can be adjusted by adjusting the depth of the micro-catheter and the position of the steel wire. The myocardial tissue of the occluded vessel is gradually adapted to fresh blood. The end of the micro catheter with the steel wire outlet is blocked by a plug 5, the steel wire returns to the tail end and is positioned at the right end of the drug input tube, and the drug which can expand the micro blood vessel and prevent the formation of thrombus is injected from the drug input tube 3 to the far end of the coronary artery so as to carry out sufficient pretreatment on the blocked coronary artery, and even the thrombolytic drug can be pumped by a micro pump to carry out intracoronary thrombolysis.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims (10)

1. The utility model provides a multi-functional little pipe of coronary artery blood flow guide and medicine injection, includes the body, its characterized in that, the head end of body is equipped with the tip section, the hole aperture of tip section is greater than the external diameter of steel wire, the head of body is equipped with a plurality of tunnels, the tunnel with the tip section all with the body intercommunication, each the tunnel is followed the length direction of body distributes, and adjacent all be equipped with certain angle between the tunnel.

2. The multifunctional coronary flow guiding and drug injection microcatheter according to claim 1, wherein: the head of body is equipped with 3 the pore is first pore, second pore and third pore way respectively, first pore is apart from the distance of tip section's head end is 3-8mm, the distance of second pore is apart from the distance of tip section's head end is 25-35mm, the distance of third pore is apart from the distance of tip section's head end is 35-50 mm.

3. The multifunctional coronary flow guiding and drug injection microcatheter according to claim 2, wherein: the adjacent pore channels are arranged at intervals of 90 degrees.

4. The multifunctional coronary flow guiding and drug injection microcatheter according to claim 1, wherein: the tail end of the medicine input pipe is provided with a luer connector for connecting with medicine injection equipment.

5. The multifunctional coronary flow guiding and drug injection microcatheter according to claim 4, wherein: the included angle between the medicine input tube and the tube body is 25-45 degrees.

6. The multifunctional coronary flow guiding and drug injection microcatheter according to claim 1, wherein: the tail end of the pipe body is provided with a plug which can be detachably connected, a sealing column is arranged at the center of the plug, a steel wire through hole is formed in the center of the sealing column, and the sealing column extends into the inner hole of the pipe body.

7. The multifunctional coronary blood flow guiding and drug injection microcatheter according to claim 6, wherein: the outer diameter of the sealing column is matched with the inner hole diameter of the pipe body, and the inner diameter of the pipe body is 0.8-0.9 mm.

8. The multifunctional coronary flow guiding and drug injection microcatheter according to claim 1, wherein: the inner hole of the sharp pipe section is a conical hole, the big end of the inner hole is positioned at the tail end, and the small end of the inner hole is positioned at the head end.

9. The multifunctional coronary flow guiding and drug injection microcatheter according to claim 8, wherein: the outer diameter of the head end of the sharp pipe section is 0.8-0.9mm, and the inner diameter is 0.6-0.68 mm; the external diameter of the tail end of the sharp pipe section is 1-1.3mm, and the internal diameter is 0.7-0.8 mm.

10. The multifunctional coronary flow guiding and drug injection microcatheter according to claim 1, wherein: the outer surface of the 2/5-3/5 body of body head end and the surface of tip section all are equipped with hydrophilic coating, and the internal surface is equipped with the weaving layer.

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