| 摘要 |
Provided is a new type of balloon catheter used for ultrasound-guided percutaneous pulmonary valve balloon angioplasty, belonging to the field of interventional treatment. The balloon catheter comprises a catheter and three balloons arranged on the outer side of said catheter; the balloons are sleeved on said catheter, achieving a seal; the three balloons are, in sequence, a guide balloon (1), a dilation balloon (2), and a positioning balloon (3); inside the catheter are provided four separate passageways arranged in parallel along the length of the catheter; each of the balloons corresponds to a unique seal and is sleeved on the outer side of the opening of each passageway located at the side wall, forming expandable sealed spaces which are separate from each other and which do not interfere with each other. The guide balloon expands after inflation, and its cross-sectional area increases significantly in comparison with the cross-sectional area of the catheter; at that time, an ultrasound probe can easily detect the position of the balloon, facilitating the determination of the position of the top end of the catheter. Therefore, when using the above balloon catheter structure to perform angioplasty, ultrasound can be effectively used for guidance, preventing the harm caused by using radiation for guidance. |
