Cardiovascular intervention device

Abstract

The invention discloses a cardiovascular intervention device, which belongs to the technical field of cardiovascular surgical instruments and is characterized in that a puncture catheter is filled with liquid medicine in advance, a net-shaped support is expanded along with input of air of an air pump, a contracted blood vessel position is expanded, and a tip part extends out of an inflation inlet of the puncture catheter by a piston head along with continuous inflation of the air pump; according to the device, when a cardiovascular expansion operation is carried out, instant medicine such as blood vessel recovery and vascular endothelial hyperplasia inhibition can be rapidly diffused to the operation position, and compared with the mode that the medicine is directly smeared on a net-shaped support, the operation is more convenient, and the operation efficiency is improved. According to the device, more liquid medicine can be input at a time, the liquid medicine amount is controllable, the liquid medicine cannot be consumed at other positions of a blood vessel when arriving at an operation position, treatment of the blood vessel operation position of a patient is better facilitated, and the interventional device is easy to operate, does not affect expansion operation and is better in treatment effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of cardiovascular surgical instruments, and in particular relates to a cardiovascular intervention device. Background Art

[0002] Cardiovascular interventional surgery, also known as cardiovascular stenting, is an interventional treatment method mainly used to treat coronary artery disease. This technology inserts a catheter into the coronary artery and places a metal stent in the narrowed blood vessel wall to expand the blood vessel and restore blood flow.

[0003] During the operation of the prior art, the doctor will inject or apply liquid medicine that is beneficial to the recovery of the surgical site, such as immunosuppressants, anti-proliferative drugs, anti-inflammatory drugs, etc., on the metal stent. This method of applying medicine will result in a large amount of loss when the liquid medicine reaches the surgical site, making it difficult to control the amount of liquid medicine. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a cardiovascular intervention device, which improves the ability to control the drug solution at the vascular surgery site by providing a pointed portion for puncturing the airbag and a puncture catheter that can be filled with drug solution.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention comprises a sheath tube, an air pump and a puncture catheter, wherein the puncture catheter is connected with the air pump, the puncture catheter coaxially penetrates into the sheath tube, the end of the puncture catheter is wrapped with a layer of airbag, the outer side of the airbag is wrapped with a layer of mesh support, the end of the puncture catheter is provided with an inflation port for inputting gas into the airbag, and the airbag is connected to the side of the end of the puncture catheter; a piston head is provided in a sealing and sliding manner in the puncture catheter, the piston head is provided with a pointed portion facing the inflation port, and the catheter pipe between the piston head and the inflation port is filled with liquid medicine, as the contracted airbag reaches the vascular surgery position, the airbag is inflated, the piston head pushes the liquid medicine and gas in the puncture catheter to expand the airbag, the mesh support supports the blood vessel, the liquid medicine is filled into the airbag, as the piston head continues to move, the pointed portion breaks the airbag, and the liquid medicine diffuses into the vascular surgery position.

[0007] Furthermore, the inflation port is provided with a stopper inwardly for blocking the piston head, and the pointed portion can extend from the stopper.

[0008] Furthermore, the pointed portion includes a plurality of elastic steel wires, the middle sections of the elastic steel wires are bent, the head ends of the plurality of elastic steel wires are fixed to the middle of the piston head, the tail ends are fixed together to form a pointed head portion, the plurality of elastic steel wires are distributed around the axis of the piston head, the elastic steel wires are arched outward relative to the axis of the piston head, when the pointed portion is in the puncture catheter, the arched portion of the elastic steel wire abuts against the inner side of the puncture catheter, and as the pointed portion extends from the inflation port, the elastic steel wire is in an open state.

[0009] Furthermore, a retaining ring is provided at the end of the puncture catheter, and the retaining ring is located at the rear end of the airbag. A degradable line is connected between the retaining ring and the end of the mesh stent. When the mesh stent completes the support and the puncture catheter is withdrawn, the airbag passes through the retaining ring and is compressed, and the medicine is squeezed out of the airbag.

[0010] Furthermore, the retaining ring includes a plurality of arcuate strips, an arcuate elastic strip is connected between the middle section of the arcuate strip and the side surface of the puncture catheter, pressure plates are fixedly provided at both ends of the arcuate strip, one of the pressure plates is provided with a latch, and the other pressure plate is provided with a pin hole, and the plurality of arcuate strips are connected by sliding head to tail to form a ring structure, a ferrule is provided at the end of the degradable line, the end of the degradable line is clamped by two pressure plates and sleeved on the latch, and a conical head is provided at the end of the puncture catheter, and when the puncture catheter is recovered, the conical head props up the retaining ring to make the degradable line fall off the retaining ring.

[0011] The beneficial effects of the present invention are:

[0012] The present invention pre-fills the puncture catheter with liquid medicine. As the air pump gas is input, the gas is pressed into the airbag along the puncture catheter, and the liquid medicine in the puncture catheter is also pressed into the airbag. After the airbag is expanded, the mesh stent can be opened and the contracted blood vessel position can be expanded. At this time, the construction of the mesh stent is completed. As the air pump continues to inflate, the piston head extends the pointed part from the inflation port of the puncture catheter to puncture the end of the airbag. The liquid medicine inside the airbag flows out immediately and diffuses at the vascular surgery site. This device can be used for cardiovascular dilation surgery while quickly diffusing immediate-acting drugs such as blood vessel recovery and inhibition of endothelial hyperplasia at the surgery site. Compared with applying the drug directly on the mesh stent, this device can input more liquid medicine at one time, and the amount of liquid medicine is controllable. When the liquid medicine reaches the surgery site, it will not be consumed at other positions of the blood vessel, which is more conducive to the treatment of the patient's vascular surgery site. This interventional device is simple to operate, does not affect the progress of the dilation surgery, and has a better treatment effect.

[0013] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0015] Figure 1 This is an overall schematic diagram of an interventional device according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the device state after the airbag is inflated according to an embodiment of the present invention;

[0017] Figure 3 A cross-sectional view of the device after the airbag is inflated according to an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the expanded tip portion of an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of a pointed portion piercing an airbag according to an embodiment of the present invention;

[0020] Figure 6 This is a schematic diagram of the overall device after the airbag is inflated according to an embodiment of the present invention;

[0021] Figure 7 for Figure 6 A magnified schematic diagram of point A;

[0022] Figure 8 for Figure 7 A cross-sectional view at point B;

[0023] The markings in the attached drawings are as follows: 1. sheath; 2. air pump; 3. puncture catheter; 31. inflation port; 32. baffle; 33. baffle ring; 331. arc strip; 332. arc elastic strip; 333. pressure plate; 334. latch; 335. pin hole; 34. conical head; 4. air bag; 5. mesh bracket; 6. piston head; 7. pointed part; 71. elastic steel wire; 8. medicine solution; 9. degradable line; 91. ferrule. DETAILED DESCRIPTION

[0024] The present invention discloses a cardiovascular intervention device, such as Figure 1As shown, it includes a sheath tube 1, an air pump 2 and a puncture catheter 3. The sheath tube 1 is used to be inserted into the artery position of the human wrist or thigh root. The puncture catheter 3 is connected with the air pump 2. The puncture catheter 3 coaxially penetrates the sheath tube 1 and extends into the human heart through the artery. The end of the puncture catheter 3 is wrapped with a layer of air bag 4. The outside of the air bag 4 is wrapped with a layer of mesh support 5. The end of the puncture catheter 3 is provided with an inflation port 31 for inputting gas into the air bag 4. The air bag 4 is connected to the end side of the puncture catheter 3; as shown Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a piston head 6 is provided in a sealed and sliding manner inside the puncture catheter 3, and a pointed portion 7 is provided on the piston head 6 in the direction of the inflation port 31. The catheter tube between the piston head 6 and the inflation port 31 is filled with liquid medicine 8. When the contracted airbag 4 reaches the vascular surgery position, the airbag 4 is inflated, and the piston head 6 pushes the liquid medicine 8 and gas in the puncture catheter 3 to expand the airbag 4. The mesh support 5 supports the blood vessel, and the liquid medicine 8 is filled into the airbag 4. As the piston head 6 continues to move, the pointed portion 7 ruptures the airbag 4, and the liquid medicine 8 diffuses into the vascular surgery position.

[0025] This cardiovascular intervention device pre-fills the puncture catheter 3 with liquid medicine 8. As the gas from the air pump 2 is input, the gas is pressed into the airbag 4 along the puncture catheter 3, and the liquid medicine 8 in the puncture catheter 3 is also pressed into the airbag 4. After the airbag 4 expands, the mesh stent 5 can be opened and the contracted blood vessel position can be expanded. At this time, the construction of the mesh stent 5 is completed. As the air pump 2 continues to inflate, the piston head 6 extends the pointed part 7 from the inflation port 31 of the puncture catheter 3 to puncture the end of the airbag 4, and the liquid medicine 8 in the airbag 4 flows out immediately. , diffuse at the vascular surgery site. This device can quickly diffuse immediate-acting drugs such as those that are beneficial to vascular recovery and inhibiting endothelial hyperplasia at the surgery site while performing cardiovascular dilation surgery. Compared with applying the drug directly to the mesh stent 5, this device can input more liquid medicine 8 at one time, and the amount of liquid medicine 8 is controllable. When the liquid medicine 8 reaches the surgery site, it will not be consumed at other locations of the blood vessel, which is more conducive to the treatment of the patient's vascular surgery site. This interventional device is simple to operate, does not affect the progress of the dilation surgery, and has a better treatment effect.

[0026] In a further solution, Figure 4 As shown, the inflation port 31 is provided with a stopper 32 inwardly for blocking the piston head 6 , and the pointed portion 7 can extend from the stopper 32 .

[0027] This structure can effectively control the final expansion size of the airbag 4 after the airbag 4 is inflated, avoiding excessive squeezing of the blood vessel by the airbag 4 and causing blood vessel rupture, and can prevent the piston head 6 and the pointed portion 7 from falling from the puncture catheter 3 into the blood vessel through the blocking of the stopper 32.

[0028] In a further solution, Figure 4 and Figure 5 As shown, the pointed portion 7 includes four elastic steel wires 71, the middle section of the elastic steel wires 71 is bent, the head ends of the four elastic steel wires 71 are fixed to the middle of the piston head 6, and the tail ends are fixed together to form a pointed head, the four elastic steel wires 71 are distributed around the axis of the piston head 6, and the elastic steel wires 71 are arched outward relative to the axis of the piston head 6. When the pointed portion 7 is in the puncture catheter 3, the arched part of the elastic steel wire 71 is against the inner side of the puncture catheter 3. As the pointed portion 7 extends from the inflation port 31, the elastic steel wire 71 is in an open state, and the free state of the elastic steel wire 71 is referred to as Figure 5 .

[0029] In this structure, the pointed portion 7 is formed into a pointed structure with a cross-shaped cross section by four elastic steel wires 71, and the pointed portion 7 has the ability to elastically expand, is compressed in the puncture catheter 3, and quickly expands after extending out of the puncture catheter 3. The cross-shaped pointed head formed by the four elastic steel wires 71 can puncture the end of the airbag 4 and open a larger opening, which is conducive to the subsequent outflow and rapid diffusion of the drug solution 8.

[0030] In a further solution, Figure 6 and Figure 7 As shown, a retaining ring 33 is also sleeved on the end of the puncture catheter 3, and the retaining ring 33 is located at the rear end of the airbag 4. A degradable line 9 is connected between the retaining ring 33 and the end of the mesh support 5. As the mesh support 5 completes the support and the puncture catheter 3 is withdrawn, the airbag 4 passes through the retaining ring 33 and is compressed, and the drug solution 8 is squeezed out of the airbag 4.

[0031] By setting the retaining ring 33, the airbag 4 can be squeezed, and the retaining ring 33 is controlled at the position of the mesh support 5 through the degradable line 9. When the puncture catheter 3 is recovered, the airbag 4 retracts accordingly, and is squeezed by the retaining ring 33. The drug solution 8 in the airbag 4 can be completely squeezed out and quickly diffused on the inner side of the opened mesh support 5, which is beneficial to the direct drug reception of the surgical site and improves the effect and controllability of the drug solution 8. The degradable line 9 and the retaining ring 33 are both made of degradable materials and are quickly degraded after the operation.

[0032] In a further solution, Figure 7 and Figure 8As shown, the retaining ring 33 includes five arc-shaped strips 331, and an arc-shaped elastic strip 332 is connected between the middle section of the arc-shaped strip 331 and the side of the puncture catheter 3. Pressure plates 333 are fixed at both ends of the arc-shaped strip 331, one of the pressure plates 333 is provided with a pin 334, and the other pressure plate 333 is provided with a pin hole 335. The five arc-shaped strips 331 are connected by sliding head to tail to form a ring structure, and a ring 91 is provided at the end of the degradable line 9. The end of the degradable line 9 is clamped by two pressure plates 333 and sleeved on the pin 334. The end of the puncture catheter 3 is provided with a conical head 34. When the puncture catheter 3 is recovered, the conical head 34 props open the retaining ring 33 to make the degradable line 9 fall off the retaining ring 33.

[0033] In this scheme, the retaining ring 33 is divided into five arc-shaped strips 331, and the five arc-shaped strips 331 are respectively connected to the puncture catheter 3 through the arc-shaped elastic strips 332. The arc-shaped strips 331 fix the degradable line 9 with the loop 91 through the cooperation of the pin 334 and the pin hole 335. The position of the degradable line 9 on the retaining ring 33 is limited by two pressure plates 333. As the airbag 4 retracts, the airbag 4 will slightly open the retaining ring 33. At this time, the pressure plate 333 and the pin 334 still pull the degradable line 9 to fix the position of the retaining ring 33. After the extrusion of the drug solution 8 of the airbag 4 is completed, the conical head 34 at the end of the puncture catheter 3 further expands the retaining ring 33 to make the pin 334 leave the pin hole 335. At this time, the degradable line 9 can be separated from the retaining ring 33, and the retaining ring 33 is taken out of the blood vessel along with the puncture wire. This structure can reduce the surgical residues remaining in the blood vessel, avoid the residual retaining ring 33 affecting the blood circulation in the blood vessel, and further ensure the patient's recovery.

[0034] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A cardiovascular intervention device, comprising a sheath tube (1), an air pump (2) and a puncture catheter (3), wherein the puncture catheter (3) is connected to the air pump (2), the puncture catheter (3) coaxially penetrates the sheath tube (1), the end of the puncture catheter (3) is wrapped with a layer of air bag (4), and the outer side of the air bag (4) is wrapped with a layer of mesh stent (5), characterized in that: The end of the puncture catheter (3) is provided with an inflation port (31) for inputting gas into the airbag (4), and the airbag (4) is connected to the side of the end of the puncture catheter (3); a piston head (6) is provided in a sealing and sliding manner in the puncture catheter (3), and the piston head (6) is provided with a pointed portion (7) facing the inflation port (31); the catheter pipe between the piston head (6) and the inflation port (31) is filled with a medicinal liquid (8); when the contracted airbag (4) reaches the vascular surgery position, the airbag (4) is inflated, and the piston head (6) pushes the medicinal liquid (8) and gas in the puncture catheter (3) to expand the airbag (4), the mesh support (5) supports the blood vessel, and the medicinal liquid (8) is filled into the airbag (4); as the piston head (6) continues to move, the pointed portion (7) ruptures the airbag (4), and the medicinal liquid (8) diffuses into the vascular surgery position.

2. The cardiovascular intervention device according to claim 1, characterized in that: The inflation port (31) is provided with a stopper (32) inwardly for blocking the piston head (6), and the pointed portion (7) can extend from the stopper (32).

3. The cardiovascular intervention device according to claim 2, characterized in that: The pointed portion (7) comprises a plurality of elastic steel wires (71), the middle section of the elastic steel wires (71) is bent, the head ends of the plurality of elastic steel wires (71) are fixed to the middle part of the piston head (6), and the tail ends are fixed together to form a pointed head portion, the plurality of elastic steel wires (71) are distributed around the axis of the piston head (6), the elastic steel wires (71) are arched outwardly relative to the axis of the piston head (6), when the pointed portion (7) is in the puncture catheter (3), the arched portion of the elastic steel wire (71) abuts against the inner side of the puncture catheter (3), and as the pointed portion (7) extends from the inflation port (31), the elastic steel wire (71) is in an open state.

4. The cardiovascular intervention device according to claim 3, characterized in that: The end of the puncture catheter (3) is also sleeved with a retaining ring (33), and the retaining ring (33) is located at the rear end of the airbag (4). A degradable thread (9) is connected between the retaining ring (33) and the end of the mesh stent (5). When the mesh stent (5) completes the support and the puncture catheter (3) is withdrawn, the airbag (4) passes through the retaining ring (33) and is compressed, and the drug solution (8) is squeezed out of the airbag (4).

5. The cardiovascular intervention device according to claim 4, characterized in that: The retaining ring (33) comprises a plurality of arcuate strips (331), wherein an arcuate elastic strip (332) is connected between the middle section of the arcuate strip (331) and the side surface of the puncture catheter (3), and pressure plates (333) are fixedly provided at both ends of the arcuate strip (331), wherein one of the pressure plates (333) is provided with a latch (334), and another of the pressure plates (333) is provided with a pin hole (335). The plurality of arcuate strips (331) are connected by sliding end to end to form a ring structure, and a ferrule (91) is provided at the end of the degradable line (9), and the end of the degradable line (9) is clamped by two pressure plates (333) and sleeved on the latch (334). The end of the puncture catheter (3) is provided with a conical head (34), and when the puncture catheter (3) is recovered, the conical head (34) props open the retaining ring (33) to make the degradable line (9) fall off the retaining ring (33).

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