Please select the most similar patent number from A, B, C and D. Which number is?
An ultrasonic imaging system and a catheter thereof. The catheter comprises a catheter body (1) formed by winding metal wires. A polymer material film is plated on an external surface and/or internal surface of the catheter body (1). The polymer material film tightens spiral metal wires of the catheter body (1) to significantly improve the elasticity of the catheter.
A: The present invention relates to a balloon catheter and an ablation system. The balloon catheter comprises a catheter body, a balloon, a temperature measuring component and a limiting component. The balloon is arranged at the far end of the catheter body; the temperature measuring component comprises a temperature measuring module and a wire, the temperature measuring module being arranged on the balloon or the catheter body, and one part of the wire of the temperature measuring component being arranged in a cavity of the catheter body and extending in the axial direction of the cavity; and the limiting component is arranged in the cavity of the catheter body and is used for limiting the position of the wire of the temperature measuring component in the cavity. The present invention limits and protects the wire of the temperature measuring component by means of the limiting component, thereby avoiding the risk that a wire is pulled and broken when a balloon stretches or a catheter moves, and further preventing the wire from hindering the movement of a catheter body.
B: An intravascular ultrasound imaging catheter and system, the intravascular ultrasound imaging catheter comprising: a sheath tube (10); a flexible drive shaft (20) arranged in the sheath tube (10), with a first end of the flexible drive shaft being configured to be electrically connected to a drive device (100), and the drive device (100) being configured to drive the flexible drive shaft (20) to rotate in the sheath tube (10) and move in an axial direction of the flexible drive shaft (20); and a transducer, which is arranged at a second end of the flexible drive shaft (20) and comprises a microelectromechanical ultrasound transducer array chip (30) configured to be electrically connected to an ultrasound host (200) so as to transmit an obtained imaging electric signal to the ultrasound host (200) or receive an excitation electric signal transmitted from the ultrasound host (200). The intravascular ultrasound imaging catheter and system solve the problems of an ultrasound transducer element used in a traditional intravascular ultrasound imaging catheter whereby same has a complex processing process, a low degree of integration and a high manufacturing cost, and limits the improvement of working performance of an intravascular ultrasound imaging system.
C: A ureteral catheter structure, comprising a catheter body (1); the catheter body (1) comprises an inter-spliced stepped braided tube (2), curved tube (3) and plastic catheter head (14); a splicing site between the stepped braided tube (2) and the curved tube (3) receives a first stainless steel outer tube (4), the first stainless steel outer tube (4) being covered with a first PET heat shrinkable thin film (5); a second stainless steel outer tube (6) is received between the curved tube (3) and the plastic catheter head (14), the second stainless steel outer tube (6) being covered with a second PET heat shrinkable thin film (7); a traction wire (8) is provided within the catheter body (1), an end of the traction wire (8) being fixed on the curved tube (3), while the other end passes through the stepped braided tube (2); and a heat shrinkable sleeve (9) is provided outside of the curved tube (3). An end of the ureteral catheter may be independently bent in multiple sections, thereby achieving a good detection effect, and solving the technical problem wherein a deflection of an end of a ureteral catheter is unstable.
D: A medical catheter and a three-dimensional magnetic positioning system. The medical catheter comprises a catheter body (300), a first magnetic sensor (341), and a second magnetic sensor (342). The catheter body (300) comprises a tip tube section (310), an adjustable bending section (320) and a straight tube section (330) which are sequentially connected in an axial direction. The first magnetic sensor (341) and the second magnetic sensor (342) are both provided on the tip tube section (310). The positioning of the medical catheter is more accurate, which is beneficial to improving the control precision of the medical catheter.
Answer: B