Importance

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Abstract

A plunger rod (104) for use in connection with a syringe barrel (102) is provided. The plunger rod (104) comprises a distal plunger top (105), having a proximal bottom surface (113), and a proximal elongated shaft (106) comprising a proximal end (107a) adapted to receive an applied force along an axis (1000) and a distal end plate (107b) adapted to transmit said applied force along said axis (1000). The plunger rod (104) is adapted to be inserted into the barrel (102) of a syringe (100) extending along the axis (1000). The distal plunger top (105) and the proximal elongated shaft (106) are connected to each other by a releasable connection (115). The releasable connection (115) comprises: distal top rupture means (116) comprising at least one distal top rib (125a) disposed eccentrically from the axis (1000) on the proximal bottom surface (113), and proximal shaft rupture means (117) comprising at least one proximal shaft rib (125b) disposed eccentrically from the axis (1000) on the distal end plate (107b). Each said at least one distal top rib (125a) is connected to a corresponding at least one proximal shaft rib (125b), said ribs (125a, 125b) being connected at a contact area (118), and wherein said distal top rupture means (116) is configured to detach from the proximal shaft rupture means (117) due to compression failure when the distal plunger top (105) is pushed into a distal end (110) of the barrel (102). A syringe is also provided.

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First Claim