US Patent 11654267 Medical instrument and medical method for localized drug delivery

Disclosed herein are medical instrument and medical method for localized drug delivery. The medical instrument can comprise a catheter shaft assembly, a hub coupled to the proximal end of the catheter shaft assembly, an inflatable component at the distal end of the catheter shaft assembly, a tissue penetrating member coupled to the inflatable component in an orientation transverse to the longitudinal axis of the catheter shaft assembly, and at least one protective element coupled to the inflatable component in proximity to the tissue penetrating member. The protective element can be configured to prevent any damage of the inflatable body during a placement of the medical instrument and an actuation of the inflatable component.