Dual lumen microcatheter

Abstract

The present disclosure relates to the field of endovascular treatment. More particularly, the present invention is a tool designed to implement an endovascular treatment by the implementation of two or more lumens on a microcatheter and/or having a side hole in a single lumen. The present invention ameliorates the medical difficulty associated with making a good plug to prevent reflux of liquid embolic along catheter and maximize distal penetration, usually in treatment of arteriovenous malformations (AVM) and arteriovenous fistulas (AVF).

Claims

1. A multiple lumen catheter to deliver balloons, coils or liquid embolics, comprising: at least two lumens fused onto proximal end of said catheter, a primary hole and a secondary hole at the distal end of said catheter.

2. The catheter of claim 1, further including a lure-lock disposed on at least one said lumen.

3. The catheter of claim 1, wherein said secondary hole is disposed approximately 10 cm or less proximal to said primary hole.

4. The catheter of claim 1 further including a detachment site.

5. The catheter of claim 1 further including a balloon disposed thereon.

6. The catheter of claim 1, for intracranial vascular use, peripheral vascular, and/or cardiac use.

7. The catheter of claim 1, enclosed in an intermediate catheter for intracranial use, which acts as a support catheter for delivery of additional microcatheter there through, with at least one balloon disposed thereon to arrest reverse flow when desired.

8. The catheter of claim 1, is enclosed in an intermediate catheter for intracranial use, which acts as a support catheter for delivery of additional microcatheter there through, with at least one balloon disposed thereon to reverse flow when desired.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The invention will be better understood and objects other than those set forth above will become apparent when consideration is given to the following detail description thereof Such description makes reference to the annexed drawings wherein:

[0021] FIG. 1. depicts dual lumen microcatheter (10) with primary distal hole (12) and primary proximate hole (14). FIG. 1. shows left lock (15) on each proximal lumen hole (14), (16) and (18); FIG. 1 also depicts secondary proximal lumen, also known as proximal side hole lumen (16) and balloon lumen (18); and still further depicts catheter (11) with a balloon (20), detachment site (13) and distal hole of secondary lumen (17).

[0022] FIG. 2 depicts a microcatheter equivalent to that shown in FIG. 1 without the embedded balloon and its associated balloon; the embodiment shown in FIG. 2 is ideally dimensioned to fit within the intermediate catheter of FIG. 3, and hence pass through FIG. 3 (or be used independently).

[0023] FIG. 3 depicts an intermediate intracranial or intracranial guide catheter with an inner diameter of approximately 0.8 mm to 3 mm (or 9 French); this embodiment a sufficiently large inner diameter between access holes (12) and (14) so as to allow insertion of the embodiments shown in FIG. 2 to pass there through.

DETAILED DESCRIPTION OF THE INVENTION

[0024] The present disclosure teaches a microcatheter with two separate lumens. The lumen that ends more proximally might end/exit perhaps 0.2 mm to 6 cm (sweet spot 5 mm-30 mm) more proximal than the other lumen. Other length differences are possible as wellone version can be used for dual microcatheter technique to coil aneurysmsin this version two lumens might end 0 mm to 15 mm apart. The concept is otherwise primarily for the delivery of liquid embolics.

[0025] In order to make the formation of the proximal plug even easier and more controlled, a balloon can be added more proximally on the catheter, or on a separate distal access catheter (DAC also known as the intermediate catheter), in order to temporarily arrest flow of blood while forming the plug with Onyx or Glue. This balloon could be on the dual lumen microcatheter itself. Alternatively, to avoid affecting the deliverability of the microcatheter, there can be a separate balloon mounted intermediate catheter, through which the dual lumen microcatheter can be delivered; and the balloon on the intermediate catheter can then be used to temporarily stop flow during the plug formation.

[0026] The present invention can have both detachable and non-detachable tips. Side hole(s) might also be slits in either direction, and/or multiple holes along the same region of the distal catheter. It can have or not have a balloon proximally attached.

[0027] All versions of the present invention would have radio opaque markers at the distal end (with the distal hole), at the end of the other lumen/the side hole or in the single lumen versions at the site of the side hole(s)/slit(s), and for versions with a balloon at the proximal end of the balloon and at the distal end of the balloon.

[0028] The present invention when used to arrest flow is most useful for injecting liquid embolics for arteriovenous malformation fistula treatment and related procedures. The present invention when used to reverse flow is most useful for injecting liquid embolics for liquid embolics for arteriovenous malformation and arteriovenous fistula or stroke.

[0029] The present invention is used to inject glue or plugging material using a balloon mounted removable catheter. More particularly, the present invention arrests flow for side-injection of glue and proximal control during treatment. The present invention is used to arrest or reverse flow of blood during thrombectomy to facilitate clot retrieval and minimize instances of distal emboli.

[0030] Where a range of values is provided, it is understood that each intervening value, to the tenth of the unit of the lower limit unless the context clearly dictates otherwise, between the upper and lower limit of that range and any other stated or intervening value in that stated range is encompassed within the invention. The upper and lower limits of these smaller ranges which may independently be included in the smaller ranges is also encompassed within the invention, subject to any specifically excluded limit in the stated range. Where the stated range includes one or both of the limits, ranges excluding either both of those included limits are also included in the invention.

[0031] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although any methods and materials similar or equivalent to those described herein can also be used in the practice or testing of the described invention, exemplary methods and materials have been described. All publications mentioned herein are incorporated herein by reference to disclose and described the methods and/or materials in connection with which the publications are cited.

[0032] It must be noted that as used herein and in the appended claims, the singular forms a, and, and the include plural references unless the context clearly dictates otherwise.

[0033] The publications discussed herein are provided solely for their disclosure prior to the filing date of the present application and each is incorporated by reference in its entirety. Nothing herein is to be construed as an admission that the described invention is not entitled to antedate such publication by virtue of prior invention. Further, the dates of publication provided may be different from the actual publication dates which may need to be independently confirmed.

[0034] While the described invention has been described with reference to the specific embodiments thereof it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the true spirit and scope of the invention. In addition, many modifications may be made to adopt a particular situation, material, composition of matter, process, process step or steps, to the objective spirit and scope of the described invention. All such modifications are intended to be within the scope of the claims appended hereto.