US 2008/0167619 A1 · Indwelling needle

Abstract

An indwelling needle 1 is composed of a cylindrical body 3, a needle 4 having a sharp edge 4a at a tip thereof, a cylindrical hub 5 which retains a proximal end of the needle 4 and which advances and retracts along the main body 3, and a protective cover 6 which advances and retracts along the main body 3 to project leftward, in the drawings, from the main body 3, and a spring 7 elastically installed between the hub 5 and the protective cover 6. A first engaging portion 11b of an actuating lever 11 provided on the body is engaged with a first projection 6a of the protective cover and a second through-hole 22b in the hub to allow a first retention mechanism A to retain the indwelling needle in a use state. The first engaging portion is moved upward to release the first retention mechanism. This separates the protective cover and the hub from each other under the elastic force of a spring. The protective cover and the hub are thus retained in a housed state by a second retention mechanism B and a third retention mechanism C, respectively. This configuration enables a reduction in the length of a member contacting a patient in the use state.

Claims6

Dependent claims

An indwelling needle comprising a needle having a sharp edge formed at a tip thereof, a cylindrical hub that retains the needle, and a cylindrical protective cover which surrounds the needle and which is slidable along the needle,

the indwelling needle being switchable between a use state in which relative movement of the protective cover to a proximal end of the needle is caused to project the sharp edge of the needle from the protective cover and a housed state in which relative movement of the protective cover to a distal end of the needle is caused to house the sharp edge of the needle in the protective cover, the indwelling needle comprising:
a cylindrical body portion which slidably retains the hub and protective cover and which is fixed to an attaching object, a spring that is elastically installed between the hub and the protective cover, and an actuating lever that compresses the spring to move the hub and protective cover closer to each other to maintain the use state, characterized in that
in the use state, the actuating lever is operated to cause relative movement of the hub and protective cover away from each other under the elastic force of the spring to house the sharp edge of the needle in the protective cover to establish the housed state.

Dependencies are inferred from the claim text.

Indwelling needle

Life of this patent

Indwelling needle

Life of this patent

Abstract

Claims6