Surgical instrument for injecting a pharmaceutical product through dense tissue of a human or animal body

摘要

A surgical instrument for perforating dense tissue of a human or animal body and for injecting a pharmaceutical product behind the tissue. The instrument includes a hand-piece with a housing for a pharmaceutical product container. The hand-piece has two opposite ends, one of which includes an axial throughway leading into the housing for passing a perforator injection needle inserted in the container. The other end is used to drive the container and needle in rotation. The surgical instrument further includes a member that, during perforation, can exert pressure on the pharmaceutical product in the container inserted in the housing to prevent perforation debris from entering into the needle.

主权项

1. A surgical instrument for injecting a pharmaceutical product into a human or non-human animal body, the surgical instrument comprising:
a cylindrical holder having opposed first and second ends, a neck at the first end of the cylindrical holder, and a longitudinal axis, wherein the cylindrical holder receives, at the second end of the cylindrical holder, a pharmaceutical product container containing the pharmaceutical product so that the pharmaceutical product container rotates with rotation of the cylindrical holder; a perforating needle having opposed first and second ends and rotatably attached to the neck at the first end of the cylindrical holder, wherein
the perforating needle has, at the first end of the perforating needle, an outlet opening for ejection of the pharmaceutical product, from the pharmaceutical product container located in the cylindrical holder, in response to an axial force exerted on the pharmaceutical product along the longitudinal axis of the cylindrical holder, toward the first end of the perforating needle, andthe second end of the perforating needle extends into the pharmaceutical product container located in the cylindrical holder; and a hand-piece having a hand-piece body with a housing that houses the cylindrical holder, wherein
the hand-piece body has a longitudinal axis and the housing is symmetrical in rotation about the longitudinal axis of the hand-piece body,the cylindrical holder is freely rotatable about the longitudinal axis of the cylindrical holder when the cylindrical holder is housed in the housing, andthe hand-piece body has first and second opposed ends and comprises
a head located at the first end of the hand-piece body, the head having an axial throughway through which the neck of the cylindrical holder, with the perforating needle rotatably attached to the cylindrical holder, passes when the head is fixed to the first end of the cylindrical holder,a bottom part located at the second end of the hand-piece body, wherein the bottom part houses
(i) driving means for rotating the pharmaceutical product container and, via the pharmaceutical product container, rotating the cylindrical holder and the perforating needle, and(ii) a member acting on the pharmaceutical product container and including an electronic control module for controlling ejection of the pharmaceutical product from the pharmaceutical product container into the perforating needle during rotation of the perforating needle and preventing perforation debris from entering the opening of the perforating needle during perforating rotation of the perforating needle, wherein the electronic module includes a memory storing instructions for injection of predetermined quantities of the pharmaceutical product in relation to progress in perforation of a human or non-human animal body by the perforating needle; and a coaxial ball bearing located between the head and the neck and including ball bearing balls and a raceway that has a straight cylindrical part for supporting radial forces and a conical part for supporting axial forces.