Table 1

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

	8 French	7 French	6 French	5 French	4 French
*Supertorque; †Infiniti; ‡Expo; §Site Steer.
Cordis	0.067 inch body	0.057 inch body	0.051 inch body*	0.044 inch body*	0.042 inch body†
	0.047 inch tip	0.047 inch tip	0.042 inch tip*	0.042 inch tip*	0.042 inch tip†
			0.057 inch body†
			0.057 inch tip†
Boston Scientific		0.064 inch‡	0.056 inch‡	0.045 inch‡
Medtronic			0.055 inch§	0.045 inch§	0.042 inch§