| 摘要 |
<p>This invention relates to a drug cartridge assembly for use with a reusable body assembly of a medication delivery pen. The drug cartridge is disposable and is in the form of a single integral unit having a generally tubular barrel with a distal end defined by an inwardly converging shoulder and an open proximal end. A smaller diameter neck projects distally from the shoulder of the barrel, and is provided with a pierceable and resealable elastomeric seal or septum securely mounted across the open distal end defined by the neck. Medication is pre-filled into the integral cartridge assembly and is retained therein by an elastomeric stopper or plunger. The plunger is in sliding fluid-tight engagement with a tubular wall of the barrel. Distally directed forces on the plunger urge the medication from the cartridge. The proximal end of the tubular barrel is configured for interconnecting the drug cartridge with a pen body assembly and the distal end of the tubular barrel is configured to securely but releasably engage a needle cannula assembly.</p> |
