Background
Methods
Animal experiment
Design requirements
Mapping and ablation requirements
Deflectable requirement
Handle maneuverability
Compatibility
Design
Irrigated electrodes design of the CIDMA catheter
Design of the main body portion
Distal end portion design of the CIDMA catheter
Design of the handle portion
Energy supply of the CIDMA catheter
Statistics
Results
Catheter verification
Bending load of the catheter shaft
Sample | The bending load of shaft soaking in water (N) | The diameter of adjustable circular (mm) | The diameter in loop (mm) | The bending force of handle (N) | |||
---|---|---|---|---|---|---|---|
In water 0 min | In water 30 min | In water 240 min | Initial state | Controlled state | |||
1# | 3.1379 | 2.008 | 1.7442 | 31.73 | 28.77 | 2.35 | 13.53 |
2# | 2.8277 | 1.7384 | 1.4932 | 32.92 | 28.98 | 2.33 | 13.75 |
3# | 2.8336 | 1.8497 | 1.4032 | 32.57 | 28.09 | 2.25 | 13.55 |
Mean ± SD | 2.9331 ± 0.1774 | 1.8654 ± 0.1355 | 1.5469 ± 0.1767 | 32.41 ± 0.61 | 28.61 ± 0.47 | 2.31 ± 0.05 | 13.61 ± 012 |
P value | 0.018 | 0.013 | – | – |
The adjustable circle diameter of the CIDMA catheter
The outside diameter measurement of the CIDMA catheter
The bending force of the handle
Push performance of the CIDMA catheter
Animal experimental evaluation of the CIDMA catheter
Electroanatomic mapping capability
Ablation results of the CIDMA catheter
Contact force | Perfusion flow | Power | Time | Temperature | |
---|---|---|---|---|---|
Unipolar ablation | —— | 60 ml/min | 20 W | 45S | 45 °C |
Bipolar ablation | —— | 60 ml/min | 15 W | 45S | 45 °C |
values | The number of related electrodes (uni/bipolar,10/10) | unipolar ablation (n = 2) | bipolar ablation (n = 2) | P value | |
---|---|---|---|---|---|
Ablation characteristics | Last power (W) | 10/10 | 19.6 ± 1.3 | 15.0 ± 0.0 | 0.000 |
max power (W) | 10/10 | 20.0 ± 0.0 | 15.0 ± 0.0 | 0.000 | |
Full power time (S) | 10/10 | 11.7 ± 2.1 | 7.1 ± 2.5 | 0.000 | |
Full temperature time (S) | 1/0 | 30.0 ± 0.0 | – | – | |
initial temperature (°C) | 10/10 | 37.4 ± 0.5 | 36.8 ± 0.4 | 0.003 | |
final temperature (°C) | 10/10 | 40.9 ± 2.0 | 37.1 ± 2.8 | 0.000 | |
initial resistance (Ω) | 10/10 | 175.0 ± 8.2 | 174.3 ± 22.5 | 0.926 | |
final resistance (Ω) | 10/10 | 140.8 ± 9.5 | 164.8 ± 21.3 | 0.006 | |
Ablation lesions | length (mm) | 10/10 | 5.0 ± 1.3 | 2.8 ± 0.2 | 0.000 |
width (mm) | 10/10 | 4.6 ± 0.7 | 4.2 ± 0.5 | 0.142 | |
height (mm) | 10/10 | 4.2 ± 0.6 | 2.3 ± 0.4 | 0.000 |