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Accurate dose control mechanisms and drug delivery syringes

A dose control, syringe technology, applied in syringes, ampoule syringes, hypodermic instruments, etc., can solve problems such as inability to eliminate bubble capture

Inactive Publication Date: 2014-08-20
UNITRACT SYRINGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even pre-filled injection gas cannot completely eliminate the trapping of air bubbles during the filling procedure

Method used

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  • Accurate dose control mechanisms and drug delivery syringes
  • Accurate dose control mechanisms and drug delivery syringes
  • Accurate dose control mechanisms and drug delivery syringes

Examples

Experimental program
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Effect test

Embodiment Construction

[0031] As used herein to describe the relative position of the dose control mechanism, drug delivery syringe, or any part of the invention, the word "axial" or "axially" generally refers to the longitudinal axis "A" and has the control mechanism and The syringes are preferably arranged around it, however not necessarily symmetrically. The word "radial" generally refers to a direction normal to axis "A". The terms "proximal", "rear", "rear", "rear" or "dorsally" generally refer to an axial direction toward "P". The words "distal", "anterior", "anterior", "anterior", "forward", "depressed" or "forward" generally refer to the axial direction toward "D". As used herein, the word "glass" should be understood to include other similar non-reactive materials suitable for medical grade applications generally requiring glass, including but not limited to certain non-reactive polymers such as Cyclic olefin copolymers (COC), cyclic olefin-based polymers (COP), and the like. The word "p...

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Abstract

A dose control mechanism 10 for a syringe includes a plunger 14 having a coarse pitch screw 14B on its exterior surface, a housing 20 having a corresponding coarse pitch guide 20C along the interior surface of the housing 20, a screw 30 having a fine pitch screw 30B which interfaces with a fine pitch nut 18B of an adapter 18, wherein the plunger 14 has an internal annular space 14C within which screw 30 at least partially resides. An accurate dose drug delivery syringe includes such a dose control mechanism 10, a barrel 140, a plunger seal 136, and a barrel adapter assembly 150 having a barrel tip 152 and a needle 154. The syringe may be a fill-at-time-of-use syringe 100, a pre-filled syringe 200, or a safety syringe 300 having integrated needle retraction or needle sheathing safety features, or a combination thereof. Methods of assembly, manufacturing, and operation are similarly disclosed.

Description

[0001] [Cross Reference to Related Applications] [0002] This application claims priority to US Provisional Application No. 61 / 568,509, filed December 8, 2011, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates to precision dose drug delivery syringes. More specifically, the present invention relates to a precision dose control mechanism, a drug delivery syringe that fits into the control mechanism, a method of operating the device, and a method of assembling the device. Background technique [0004] Various studies have indicated that the accuracy of dose delivery is affected by several factors, including: the injection method used by the medical practitioner, the inability to accurately interpret and control the movement of the plunger during the injection process, and the use of the injection method before the injection step. The initial step of deairing the syringe is its associated medicament deple...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/28A61M5/315
CPCY10T29/49826A61M5/28A61M2005/3139A61M5/31575A61M2005/3152A61M5/31528F04C2270/041A61M5/31585A61M5/31526
Inventor G·N·谢蒂L·卡斯塔尼亚
Owner UNITRACT SYRINGE
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