Catheter

A catheter and guiding channel technology, applied in the field of neurosurgical catheters, can solve the problems of inapplicability for long-term implantation and easy breakage

Inactive Publication Date: 2010-11-24
RENISHAW (IRELAND) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fused silica tubing is relatively brittle and tends to break easily if bent excessively
This makes the catheter unsuitable for long-term implantation in the subject

Method used

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Examples

Experimental program
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Embodiment Construction

[0048] Referring to Figure 1, there is shown a prior art implantable fluid delivery system of the type described in WO2003 / 077785. The fluid delivery system comprises an introducer device comprising an elongated introducer tube 2 having a head 4 at its proximal end. The head 4 has external threads 6 to allow connection to a bore hole formed in the subject's skull 8 . The catheter device is inserted stereotactically into the brain parenchyma 10 using a stereoguidance device. In particular, the guide tube device can be accurately inserted into the brain along the predetermined insertion axis such that the distal end 12 of the guide tube device is positioned just short of the target point 15 (by a distance d). More details on accurate (eg stereotaxic) insertion of guide tubes can be found elsewhere; see eg WO2003 / 077784, WO2003 / 077785 and US6609020.

[0049] After implantation of the catheter device, the catheter is inserted through the head 4 into the catheter 2 . The cathete...

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PUM

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Abstract

The invention relates to rigid surgical devices formed from rigid ceramics such as zirconium dioxide. In particular, the invention relates to a neurosurgical catheter formed from extruded zirconium dioxide. The invention also relates to an advancement means for advancing or retracting such a device along an axis of insertion into a patient.

Description

technical field [0001] The present invention relates to medical catheters and, in particular, the present invention relates to neurosurgical catheters for insertion directly into the brain parenchyma of a subject. Background technique [0002] There are many situations in which it is desirable to deliver a therapeutic agent directly to a specific target within the brain parenchyma via an implanted catheter. Moreover, many of these therapeutic agents can cause unwanted side effects if delivered to healthy parts of the brain. Examples of treatment of abnormal brain function include acute infusion of gamma-aminobutyric acid agonists into epileptic foci or pathways to prevent dissemination, and chronic delivery of opiates or other analgesics to periaqueductal gray matter or thalamic targets for treatment unmanageable pain. Furthermore, cytotoxic agents can be delivered directly into brain tumors. Intraparenchymal infusion can be used to deliver therapeutic agents to brain tar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M31/00A61M25/00A61B19/00A61M25/09A61B17/00A61B17/34
CPCA61M25/04A61B2017/0088A61M25/0662A61B2017/00911A61B2017/00469A61B2017/00902A61L29/106A61L29/16A61B2017/3409A61B19/201A61M25/02A61L2300/00A61B90/11
Inventor 雨果·乔治·戴瑞克马修·大卫·弗雷德里克·斯特拉顿埃莉诺·范德·海伊登
Owner RENISHAW (IRELAND) LTD
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