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Process for shaping a needle cannula

A technology for needle insertion and intubation, which is applied in the field of needle intubation and can solve problems such as difficulty in implementation

Inactive Publication Date: 2014-06-25
NOVO NORDISK AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process is rather difficult to implement as it requires both centrifugal force and relative motion

Method used

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  • Process for shaping a needle cannula
  • Process for shaping a needle cannula
  • Process for shaping a needle cannula

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] Hereinafter, when terms such as "upper" and "lower", "right" and "left", "horizontal" and "vertical", "clockwise" and "counterclockwise" or similar related forms are used, these The terminology is for the drawings only, not for actual usage. The shown figures are schematic representations, for which reason the configuration of the different structures and their relative dimensions are intended for illustrative purposes only.

[0048] In this context, it may be convenient to define as follows: in the figures the term "distal end" refers to the end of the needle cannula that penetrates the patient, while the term "proximal end" refers to the opposite end of the pointer cannula .

[0049] Figure 1 to Figure 5 A process for shaping the lumen 11 of the needle cannula 10 is disclosed.

[0050] A needle cannula 10 or preferably a plurality of needle cannulae 10 is arranged inside a compartment comprising two separate gas chambers 1 , 2 . The needle cannula 10 has an inner...

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PUM

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Abstract

A regular metallic, cylindrical tubular needle cannula (1) is subjected to a metal etching liquid (5) in the inside lumen (11) thereby increasing the inside diameter and enhancing the flow properties while maintaining the outside appearance. The inside diameter is only increased over a controlled length (14) of the full length of the needle cannula (10) leaving sufficient length and wall thickness to also taper the outside diameter if so wanted.

Description

technical field [0001] The invention relates to a method of manufacturing a needle cannula with improved flow properties and to a needle cannula obtained by the method. Background technique [0002] Needle assemblies are commonly used to inject substances into or withdraw substances from a human or animal body. Such needle assemblies are typically disposable and discarded after only one use. [0003] In producing the needle assembly, a needle cannula, typically drawn from stainless steel, is attached to a needle hub, typically molded from a suitable polymer. The needle hub usually carries means for attaching the needle assembly to the injection device. The needle cannula is typically mounted to the needle hub so that a temporary patch of fluid communication can be established between the injection devices, passing through the needle assembly and into the user's body. [0004] Needle cannulas are typically made from stainless steel tubing that is drawn through tapered dies...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/32A61B17/34B21G1/00
CPCA61B2017/00526A61B17/34B21G1/00A61M5/32B21G1/08
Inventor D.N.索伦森R.伦施拉格
Owner NOVO NORDISK AS