Table 1

 Inner lumen diameter of commonly used diagnostic catheters (measurements provided by the manufacturers)

8 French7 French6 French5 French4 French
*Supertorque; †Infiniti; ‡Expo; §Site Steer.
Cordis0.067 inch body0.057 inch body0.051 inch body*0.044 inch body*0.042 inch body†
0.047 inch tip0.047 inch tip0.042 inch tip*0.042 inch tip*0.042 inch tip†
0.057 inch body†
0.057 inch tip†
Boston Scientific0.064 inch‡0.056 inch‡0.045 inch‡
Medtronic0.055 inch§0.045 inch§0.042 inch§