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Medical needle

A stylet and distal technology, applied in the field of medical needles, can solve the problems of limited incremental resolution of uncontrolled advancement, disappearance of false resistance, etc., and achieve reliable optical measurement and minimized interference

Inactive Publication Date: 2014-12-17
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

WO2011158227A2 addresses a stated limitation of the manual LOR technique that i) "...due to the elastic nature of the ligamentum flavum (LF), elastic fibers are pushed by the needle and stretched into the epidural space (ES)" [P3 L 10]; ii) “…moreover, the resolution of uncontrolled advancement increments of the needle tip is very limited and varies widely among physicians” [P3 L 14]; and iii) “…another aspect of LORT The disadvantage is the relatively high risk of false resistance disappearing due to the small spaces between adjacent fibers, which occurs e.g. inside the LF"

Method used

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Embodiment Construction

[0035] In order to provide a medical needle with improved positioning accuracy, various embodiments of the medical needle are now described in an exemplary application of epidural anesthesia. figure 1 The anatomy of the spinal column is schematically shown, wherein the needle 1 penetrates these structures to deliver an anesthetic agent to the epidural space 7 during epidural anesthesia. In this example, it is desired to place the needle tip 8 within the epidural space 7 and subsequently inject an anesthetic reagent into the epidural space. The needle must penetrate the skin 2 , the subcutaneous fat 3 , the supraspinous ligament 4 , the interspinous ligament 5 separating the vertebrae 6 in order to reach the epidural space 7 . Once the dense interspinous ligament 5 has been pierced, the anesthetist advancing the needle feels a sudden drop in pressure at the needle tip, or the loss of resistance as the needle advances into the epidural space 7 . If the needle penetrates too fa...

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PUM

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Abstract

The present invention relates to a medical needle which comprises a needle (1) having at least one channel (21), at least one optical waveguide (22) and a syringe connector (20). The syringe connector (20) is in communication with the at least one channel (21) and permits further communication with an additional syringe (25), thereby permitting the correspondence of fluid between the syringe (25) and the tip of the needle (1). The optical waveguides (22) are arranged within the needle (1) in order to make optical measurements at the tip of the needle (1). The cross section of the distal end of the elongate tube (1) has a dividing line for each channel (21) which separates that channel (21) from the one or more optical waveguides (22).

Description

technical field [0001] The present invention relates to a medical needle comprising both a syringe for assisting in positioning the position of the medical needle and an optical waveguide for performing optical measurements at the tip of the medical needle. Background technique [0002] In the field of regional anesthesia and pain management, nerve blocks are commonly performed, ie, an anesthetic is administered near a nerve or inside the epidural space. When doing so, it is important to be able to identify the epidural space (ES) and / or nearby critical structures such as nerves and blood vessels. The gold standard for locating an ES is the Loss of Resistance (LOR) method, whereby the physician feels the loss of pressure on a syringe filled with saline or air and the tubing connecting to the needle entering the ES. When the needle tip enters the ES, the pressure on the syringe decreases due to the release of saline or air into the space, which can be felt by the physician i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/06A61B5/00A61B17/34
CPCA61B5/0053A61B5/0075A61B5/0084A61B17/3401A61B5/4896A61B2017/00061A61B90/13A61B2034/2055A61B34/20A61B90/11A61B5/065A61B1/07A61B5/4839A61B5/7264A61M5/3287A61M2205/3303A61M2205/3306A61M2205/3375A61M2205/52
Inventor S·A·罗格费恩G·W·吕卡森M·范德沃尔特A·温克尔S·福斯J·克勒韦尔B·H·W·亨德里克斯W·C·J·比尔霍夫M·米勒
Owner KONINKLJIJKE PHILIPS NV
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