Device for measuring the blood flow of a body tissue

摘要

A device for measuring the blood flow of a body tissue comprises a catheter having a catheter head for the insertion into the inside of a body tissue and a center piece having a light emission surface, out of which an optical conductor leads, and having a reflection surface, which is disposed opposite of the light emission surface and oriented obliquely to the longitudinal axis of the optical conductor. The optical conductor is disposed such that an emitted light beam is directed at the reflection surface, the emitted light beam can be deflected at the reflection surface and reflected into the body tissue, and a reflected light beam can be reflected out of the body tissue at the reflection surface and fed into the optical conductor. The catheter head is divided into an insertion region and a connecting region, wherein the insertion region comprises a plurality of recesses on the surface thereof. In the direction of the connecting region, the insertion region has an increasing diameter. The recesses are provided in the insertion region such that webs are formed in the direction of the connecting region between the recesses along the surface of the catheter head.

主权项

1. A device for measuring the flow of blood through a body tissue, comprising:
a catheter with a catheter head for insertion into the interior of a body tissue; an optical conductor inside the catheter; a light source for emitting a beam of light into the body tissue by means of the optical conductor; and a processing unit for determining the rate of blood flow by means of a beam of light reflected from the body tissue;
wherein the catheter has a middle piece with a recess comprising a light exit surface area, from which the optical conductor emerges, and a reflection surface area which lies opposite the light exit surface area and which is oriented at least partially obliquely with respect to the longitudinal axis of the optical conductor;the optical conductor being arranged in such a way that a beam of light emitted from the light source is directed to the reflection surface area, the emitted beam of light can be deflected on the reflection surface area and can be reflected into the surrounding body tissue; andwherein the distance between the catheter head and the middle piece is varied using connection elements of different lengths.