125 such as an rf transmitter such an embodiment eliminates the need to deploy a signal cable in cavity 103 each pressure sensor 120 or 120 u2032 is connected to wireless transmitter 125 by signal wire 122 alternative the pressure sensor may include an integrated wireless transmitter on the same chip or circuit board eliminating the need for discrete wire connections fig4 a and 4b show an alternative embodiment of the invention in which a plurality of sensor arrays are disposed about tip region 110 a first array of pressure sensors 120 u2032 is deployed at section c c located most adjacent to the apex of the tip which preferably also terminates with a pressure sensor 120 as in the other embodiments these sensors 120 u2032 are preferably arrayed at equal angular spacing at the periphery of the tip region 110 a second array of pressure sensors 120 u2033 is deployed a section b b located from the apex of the tip as in the other embodiments these sensors 120 are preferably arrayed at equal angular spacing at the periphery of the tip region 110 the method of using the catheters of fig1 4 includes determining the difference in force or pressure among the sensors 120 distributed about the tip 110 it is expected that when the tip 110 is centered within an artery or other body tissue conduit the difference between the pressures measured at each sensor will be at a minimum however as the apex of tip 110 steers toward or into an arterial wall or other dense tissue a difference of pressure is expected as it.