This invention discloses a measurement microcatheter and its control method, relating to the field of
medical device technology. The measurement microcatheter includes: a tube body, the distal end of which is inserted into the
in vivo tissue; the tube body includes a common pressure cavity and an opening; a mandrel, the distal end of which is equipped with an
ultrasound probe; a
pressure sensor connected to the proximal end of the tube body; and a
liquid medium filling the space between the common pressure cavity and the mandrel, with the
pressure sensor in contact with the
liquid medium. This measurement microcatheter solves the problem that existing microcatheter technologies can only provide a single morphological or functional assessment. Specifically, during
pressure measurement, the protrusion on the microcatheter where the
pressure sensor is located can prevent the microcatheter from passing through severely narrowed areas within blood vessels. By combining
ultrasound imaging with
pressure measurement, it provides doctors with accurate
diagnostic information. Furthermore, by connecting the pressure sensor to the proximal end of the tube body, the outer
diameter of the portion of the tube body inside the patient's body is reduced, allowing the tube body to reach more distant locations within the
blood vessel and lesions in finer vessels.