Method and device for dosing a liquid preparation

US5545144A · kind A · utility

Assignee

• Pharmacia AB · SE

Inventors

• Linda Fryklund · Sollentuna, SE
• Birger Hjertman · Sundbyberg, SE
• Marie-Louise Gustavsson · Stockholm, SE
• Jacob Kaluski
• Gustav Levander · Bromma, SE
• Olle Ljungquist · Täby, SE
• Anders Strom · Värnamo, SE
• Jonas Virding · Lidingö, SE

Key dates

• Filing date: Sep 26, 1994
• Grant date: Aug 13, 1996
• Expiry date: Sep 26, 2014

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M5/31595
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A liquid preparation of a pharmaceutically active agent having a defined composation is repeatedly dosed from a multi-dose container having a defined volume. The amount dosed is selected as 1/N of the volume of the multi-dose container, N being an integer having a value of 2 or higher. A device for dosing a liquid preparation comprises a holder (1) for a multi-dose container (2), which has a movable rear wall (5) acting as a piston for expelling the liquid preparation (6) from the container, and a piston rod (7), which is provided with releasable blocking means (11, 14, 19, 22), such that the movement of the piston rod is limited to a preset length (35) corresponding to an expelled volume of 1/N of the volume of said multi-dose container, N being an integer having a value of 2 or higher. A preferred embodiment of the device is as an injection device for repeated parenteral injections from an injection cartridge.