Pressure/force computer controlled drug delivery system with exit pressure control

US6786885B2 · kind B2 · utility

Assignee

• MILESTONE SCIENTIFIC, INC. · US

Inventors

• Mark N. Hochman · Great Neck, US
• Claudia Hochman · Lake Success, US
• Angelo Ascione · Woodbridge, US
• Lawrence G. Brown · Honolulu, US
• Hardie Johnson · Harrisburg, US
• Michelle Lockwood · Mechanicsburg, US

Key dates

• Filing date: Jan 22, 2001
• Grant date: Sep 7, 2004
• Expiry date: Jun 27, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S128/12
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An automatic injection device includes a drive mechanism and a sensor used to determine an internal characteristic such as a force or internal pressure generated during an injection process. This characteristic is then used as a control parameter by a microprocessor or controller which generates corresponding commands to the drive mechanism. In a particularly advantageous embodiment, the characteristic is used to calculate an exit pressure at which fluid ejected by the device through an elongated tube. The drive mechanism is then operated in such a manner that the exit pressure is maintained at a predetermined level to insure that a patient does not suffer pain and/or tissue damage.