CN204352347U - Stagewise flexible gradual change blood vessel microtubular - Google Patents

Abstract

This utility model relates to stagewise flexible gradual change blood vessel microtubular, and comprise tubular axis, described tubular axis is set to near-end near one end of operator, and tubular axis near-end is connected with the joint for connecting other medical equipments, and tubular axis is set to far-end for a section of entering patient vessel; It is characterized in that: described tubular axis comprises the sections that at least two have different hardness, multiple sections by tubular axis near-end to tubular axis far-end by by firmly connecting successively to soft order, connected by adapter between adjacent segment; Multiple sections is adopt different flexible deformable materials to make respectively.This utility model structure is ingenious, and overall flexibility is reasonable in design, medicine, therapeutant combination or other solid matters more accurately effectively easily can be sent to the specific part of sufferer.

Description

Segmented Flexible Gradient Vascular Microcatheter

technical field

The utility model relates to a microcatheter, in particular to a segmented flexible gradient blood vessel microcatheter used for drug delivery and embolization treatment of peripheral blood vessels, which belongs to the technical field of medical instruments.

Background technique

In the clinical treatment of many diseases (such as hemangioma, blood loss and tumor), it is necessary to embolize the target blood vessel. In the treatment of cancer, especially inaccessible and unresectable tumors, blockage of blood supply is almost the only way. However, guiding a microcatheter through a blood vessel to reach a target tumor is a very difficult operation. To overcome this difficulty, medical personnel have adopted many different methods in the design and manufacture of microcatheters. However, when it is necessary to deliver drugs, therapeutic compositions or other therapeutic items to the lesion that needs to be treated, the microcatheters commonly used in the market are still prone to clogging, and high pressure is required to deliver the therapeutic items. target lesion.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies in the prior art, and provide a segmented flexible gradual change vascular microcatheter, which has an ingenious structure and a reasonable overall flexible design, and can combine medicines, therapeutic substances or other solid substances more accurately and effectively Easily reach specific parts of the patient.

According to the technical solution provided by the utility model: the segmented flexible gradient vascular microcatheter includes a tube shaft, the end of the tube shaft close to the operator is set as the proximal end, and the proximal end of the tube shaft is connected with a joint for connecting other medical equipment, A section of the tube shaft used to enter the patient's blood vessel is set as the distal end; it is characterized in that: the tube shaft includes at least two segments with different hardness, and a plurality of segments are pressed from the proximal end of the tube shaft to the distal end of the tube shaft by hardness The soft parts are connected sequentially, and adjacent segments are connected by connectors; multiple segments are made of different flexible and deformable materials.

As a further improvement of the utility model, the flexible and deformable material is a nylon block copolymer.

As a further improvement of the utility model, the flexible deformable material is a block copolymer of nylon and polyethylene oxide.

As a further improvement of the utility model, the tube shaft includes two segments with different hardness, the segment near the proximal end of the tube shaft is made of PEBAX30D material with a shore D hardness of 30, and the segment near the distal end of the tube shaft Made of PEBAX72D material with a shore D hardness of 70 or nylon type 12 material with a shore D hardness of 75.

As a further improvement of the utility model, the tubular shaft includes three segments with different hardness, the segment near the proximal end of the tubular shaft is made of PEBAX30D material with a shore D hardness of 30, and the middle segment is made of a shore D hardness of 30 45 PEBAX45D material or PEBAX55D material with a shore D hardness of 55, and the segment near the distal end of the tube shaft is made of PEBAX72D material with a shore D hardness of 70 or nylon 12 material with a shore D hardness of 75.

As a further improvement of the present utility model, the tube shaft includes four segments with different hardness, the segment near the proximal end of the tube shaft is made of PEBAX30D material with a shore D hardness of 30, and the segment near the proximal end of the tube shaft The segment is made of PEBAX45D material with a shore D hardness of 45, the middle segment near the distal end of the tube shaft is made of PEBAX55D material with a shore D hardness of 55, and the segment near the distal end of the tube shaft is made of PEBAX72D with a shore D hardness of 70 material or nylon 12 with a shore D hardness of 75.

As a further improvement of the present utility model, different marks are provided on different sections of the pipe shaft.

As a further improvement of the utility model, the identification is a color identification.

As a further improvement of the utility model, the color marking is realized by infiltrating different pigments or inks into the materials of different sections of the tube shaft.

As a further improvement of the utility model, the said connector adopts a Luer connector.

As a further improvement of the utility model, a developing marking ring is provided at the distal end of the tube shaft.

As a further improvement of the utility model, the developing marking ring is set on the distal end of the tube shaft and glued and fixed with cyanoacrylate adhesive.

As a further improvement of the utility model, the developing marking ring is made of platinum-iridium alloy.

As a further improvement of the present invention, the platinum-iridium alloy is adopted, wherein the iridium alloy is 2-20%w/w platinum-iridium alloy.

As a further improvement of the present invention, the platinum-iridium alloy is adopted, wherein the iridium alloy is 10% w/w platinum-iridium alloy.

As a further improvement of the utility model, the distal end of the tube shaft is equipped with a top cap.

As a further improvement of the utility model, the top edge of the top cap is set in an arc shape.

Compared with the prior art, the utility model has the following advantages: the utility model has an ingenious structure, and the overall flexible design is reasonable, and can deliver medicines, treatment combinations or other solid substances to specific parts of patients more accurately, effectively and easily.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

FIG. 2 is an enlarged schematic diagram of part A in FIG. 1 .

FIG. 3 is an enlarged schematic diagram of part B in FIG. 1 .

Detailed ways

Below in conjunction with specific accompanying drawing and embodiment the utility model is further described.

As shown in the figure: the segmented flexible gradient vascular microcatheter in the embodiment mainly includes a tube shaft 1, the end of the tube shaft 1 close to the operator is set as the proximal end, and the proximal end of the tube shaft 1 is connected with a joint 2, as shown in the figure In an embodiment, the connector 2 adopts a Luer connector 2, which is used to connect other medical equipment such as a syringe, or a catheter for inserting a guide wire or injecting liquid into a microcatheter; the tube shaft 1 is used for entering a patient One segment of the blood vessel is set as the distal end; the tube shaft 1 includes three segments 1a with different hardness, and the three segments 1a are sequentially connected from the proximal end of the tube shaft 1 to the distal end of the tube shaft 1 in order from hard to soft , adjacent segments 1a are connected by connectors 1b; multiple segments 1a are made of different flexible and deformable materials.

The utility model adopts different materials to make different sections 1a of the tube shaft 1, so that the hardness of the tube shaft 1 gradually decreases from the proximal end to the distal end along the length direction of the tube shaft 1. Such a design makes the vascular microcatheter more Ease of handling helps to facilitate insertion and navigation of the distal end of the microcatheter through tortuous and bifurcated vasculature while maintaining stability and maneuverability of the proximal end of the microcatheter.

The change of the flexibility of the tube shaft 1 is reflected by the change of the Shore D hardness value of the corresponding part. In the embodiment of the utility model, the shore D hardness of the tube shaft 1 varies from the proximal end to the distal end in a range of 75-30. Preferably, the shore D hardness at the proximal end of the tubular shaft 1 is 60-75, and the shore D hardness at the distal end of the tubular shaft 1 is 30-40. The shore D value involved can be measured using the Trackability Evaluation System, including temperature control, clamping fixture, control panel of the trackability evaluation system, manual clamp, clamp force measurement table and artery and vessel model.

In the utility model, the flexible and deformable material is a nylon block copolymer. Such as the nylon block copolymer produced by Arkema Specialty Polyamides in France under the trademark PEBAX. More preferably, the flexible and deformable material is a block copolymer of nylon and polyethylene oxide. In the embodiment of the present utility model, the tubular shaft 1 has three sections 1a with different hardness, the section 1a near the proximal end of the tubular shaft 1 is made of PEBAX30D material with a shore D hardness of 30, and the middle section 1a It is made of PEBAX45D material with a shore D hardness of 45 or PEBAX55D material with a shore D hardness of 55, and the segment 1a near the distal end of the tubular shaft 1 is made of PEBAX72D material with a shore D hardness of 70 or nylon type 12 with a shore D hardness of 75 material.

In the present utility model, different marks are provided on different segments 1a of the tube shaft 1 to distinguish them during use. The identification is a color identification, and the color identification is realized by infiltrating different pigments or inks into the materials of different segments 1a of the tube shaft 1 .

As shown in Figure 2, in the embodiment of the utility model, the distal end of the tube shaft 1 is provided with a developing marking ring 3, and the developing marking ring 3 is set on the distal end of the tube shaft 1 and glued with a cyanoacrylate adhesive. It is combined and fixed, and the developing marking ring 3 is used to help the positioning of the distal end of the vascular microcatheter in the patient's body and the injection of therapeutic substances when performing treatment. The developing marking ring 3 is made of an iridium alloy of 2-20%w/w platinum-iridium alloy, more preferably a platinum-iridium alloy of which the iridium alloy is 10%w/w. In addition, the distal end of the tubular shaft 1 is equipped with a top cap 4, and the top edge of the top cap 4 is set in a circular arc shape.

The inner diameter of the tube shaft 1 in the utility model is uniform throughout the tube shaft 1, usually the inner diameter is 0.025-0.35 inches, which is enough to meet the passage of a guide wire with a diameter of 0.021 inches, and the preferred diameter is 0.25 inches. The usable length of tube axis 1 is 100cm～150cm, preferably 110cm～130cm.

The vascular microcatheter in the utility model can be used in the arteries and vessels of the liver, heart, kidney and uterus, and can also be used in the blood vessels of tumors or fibroids. Embolization microspheres, and blood vessel images of the treatment target.

Claims (10)

1. Segmented flexible gradient vascular microcatheter, including a tube shaft (1), the end of the tube shaft (1) close to the operator is set as the proximal end, and the proximal end of the tube shaft (1) is connected with a socket for connecting other medical equipment The joint (2), the section of the tube shaft (1) used to enter the patient's blood vessel is set as the distal end; it is characterized in that: the tube shaft (1) includes at least two segments (1a) with different hardness, and a plurality of segments Segments (1a) are connected sequentially from the proximal end of the tube shaft (1) to the distal end of the tube shaft (1) in order from hard to soft, and adjacent segments (1a) are connected by connectors (1b); multiple segments Sections (1a) are made of different flexible and deformable materials. 2. The segmented flexible tapered vascular microcatheter according to claim 1, wherein the flexible and deformable material is a nylon block copolymer. 3. The segmented flexible tapered vascular microcatheter according to claim 1, wherein the flexible deformable material is a block copolymer of nylon and polyethylene oxide. 4. The segmented flexible gradient vascular microcatheter according to claim 1, characterized in that: the tube shaft (1) includes two segments (1a) with different hardness, near the proximal end of the tube shaft (1) The segment (1a) is made of PEBAX30D material with a shore D hardness of 30, and the segment (1a) near the distal end of the tube shaft (1) is made of PEBAX72D material with a shore D hardness of 70 or nylon 12 with a shore D hardness of 75 type material. 5. The segmented flexible gradient vascular microcatheter according to claim 1, characterized in that: the tube shaft (1) includes three segments (1a) with different hardness, near the proximal end of the tube shaft (1) The segment (1a) is made of PEBAX30D material with a shore D hardness of 30, the middle segment (1a) is made of PEBAX45D material with a shore D hardness of 45 or PEBAX55D material with a shore D hardness of 55, close to the tube axis (1 ) The distal segment (1a) is made of PEBAX72D material with a shore D hardness of 70 or nylon type 12 material with a shore D hardness of 75. 6. The segmented flexible gradient vascular microcatheter according to claim 1, characterized in that: the tube shaft (1) includes four segments (1a) with different hardness, near the proximal end of the tube shaft (1) The segment (1a) is made of PEBAX30D material with a shore D hardness of 30, and the segment (1a) near the proximal end of the tube shaft (1) is made of PEBAX45D material with a shore D hardness of 45, and the middle is close to the tube shaft ( 1) The distal segment (1a) is made of PEBAX55D material with a shore D hardness of 55, and the segment (1a) near the distal end of the tube shaft (1) is made of PEBAX72D material with a shore D hardness of 70 or a shore D hardness of 75 nylon type 12 material. 7. The segmented flexible gradient vascular microcatheter according to claim 1, characterized in that: different marks are provided on different segments (1a) of the tube shaft (1). 8 . The segmented flexible tapered vascular microcatheter according to claim 1 , characterized in that: the joint ( 2 ) adopts a Luer joint ( 2 ). 9. The segmented flexible gradient vascular microcatheter according to claim 1, characterized in that: the distal end of the tube shaft (1) is provided with a developing marking ring (3). 10. The segmented flexible gradient vascular microcatheter according to claim 1, characterized in that: the distal end of the tube shaft (1) is equipped with a top cap (4), and the top edge of the top cap (4) Set to arc shape.