초록 ▼

A pressure sensing catheter includes a pressure sensor within the length of a hollow catheter insertable into the human body. The catheter has a surrounding circumferential pressure transmitting membrane that is exposed to the region whose pressure is being measured. The membrane bears against a can

A pressure sensing catheter includes a pressure sensor within the length of a hollow catheter insertable into the human body. The catheter has a surrounding circumferential pressure transmitting membrane that is exposed to the region whose pressure is being measured. The membrane bears against a cantilevered shutter whose excursion into a gap in an optical fiber varies the amount of light transmitted by the fiber as a function of the external pressure.

대표청구항 ▼

A sensor for a pressure sensing catheter, said sensor having a longitudinal axis and a periphery, a first and a second optical fiber segment having light transmitting faces spaced from one another across a gap, a shutter having a shutter segment projecting into said gap between said faces, and also

A sensor for a pressure sensing catheter, said sensor having a longitudinal axis and a periphery, a first and a second optical fiber segment having light transmitting faces spaced from one another across a gap, a shutter having a shutter segment projecting into said gap between said faces, and also having a cantilever segment anchored to the sensor at one end, with said shutter segment projecting laterally therefrom at its other end and flexibly deflectable to move said shutter segment variably into said gap as a consequence of said deflection; a pressure membrane laid atop the cantilever segment and closing said gap; and a circumferential pressure transmitting membrane extending fully around the catheter on both sides of said gap, and enveloping a chamber filled with fluid between said membranes, said circumferential pressure transmitting membrane being normally spaced from said pressure membrane.