Blood vessel sealing system

a sealing system and blood vessel technology, applied in wound clamps, medical science, surgery, etc., can solve the problems of blood clots in no practical way to positively limit the protrusion of collagen into the interior of the blood vessel, and the reclosure of the opening in the blood vessel wall, etc., to achieve accurate positioning and simple use.

Inactive Publication Date: 2008-07-03
ST JUDE MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The solution effectively prevents embolization and blood flow restrictions by ensuring the collagen plug remains outside the vessel lumen, promoting accurate sealing and minimizing the risk of vessel damage, while allowing for easy removal of the tamponading means to avoid foreign body complications.

Problems solved by technology

One of the difficulties in these procedures, however, is reclosure of the opening in the blood vessel wall after the procedure.
The difficulty with this procedure is that there is no practical way to positively limit the protrusion of the collagen into the interior of the blood vessel.
This sometimes results in the collagen being inserted or subsequently expanding through the blood vessel wall opening into the vessel lumen and causing a blood clot to form in the interior of the blood vessel.
This is undesirable because the clot and / or the protruding collagen can dislodge and move along the blood vessel to cause an embolus.
The problem with this technique is that the sealing plug may break loose before it is absorbed by the body and cause a blockage of the blood flow through the blood vessel.
The sealing plug may be a nidus for a blood clot to form and subsequently dislodge resulting in embolization.
Another potential problem in leaving a device inside the vessel wall is that the device, like any foreign body, may erode the wall of the vessel or promote extensive intravascular scaring both of which potentially will disrupt vessel architecture.

Method used

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Examples

Experimental program
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Effect test

second embodiment

of Applicator

[0047]The second embodiment of the applicator is designated 114 and is illustrated in FIGS. 11-15. The basic difference between the applicator 114 and the applicator 14 is that the applicator 114 has an open section through which the control member on the temporary sealing assembly can be installed without feeding the control member axially through the collagen plug and applicator. The applicator 114 like the applicator 14, includes a housing assembly 135, and introducer assembly 136, a retraction mechanism 138, an interconnect assembly 139, and a locator mechanism 140. These assemblies and mechanisms operate similarly to the corresponding assemblies and mechanisms of the first embodiment of the invention.

[0048]The cylindrical body 145 defines a V-shaped cutout 147 therein down to the passage through which the control member on the temporary sealing assembly passes so that control member can be laid into the passage as it is being operated to install the collagen plug. ...

third embodiment

of the Invention

[0050]FIGS. 16 and 17 illustrate a third embodiment 210 of the invention which includes a collagen plug 212 and an applicator tube 214. The collagen plug 212 is installed on the control member and the extension 31 to the syringe 26 as described with the first embodiment of the invention. The applicator tube 214 is a cylindrical tube defining a central passage therethrough to just slidably receive the control member of the temporary sealing arrangement. The physician simply slides the collagen plug 212 and the tube 214 onto the control member of the temporary sealing arrangement so that the leading end of the collagen plug 212 faces the access passage AP in the patient. The physician then uses the applicator tube 214 to push the collagen plug 212 down to the outside end of the puncture BVP. The combined overall length of the collagen plug 212 and the applicator tube 214 corresponds to that of the first embodiment of the invention so that the physician can use the indi...

fourth embodiment

of the Applicator

[0052]FIG. 18 illustrates an alternate embodiment of the applicator which has been designated by the reference of 314. The applicator 314 include an insertion barrel 150 with the projecting end 351 thereon adapted to be inserted into the access passage AP in the patient. The barrel 350 defines an internal passage therethrough adapted to slidably receive the collagen plug 12 therein. A one-way check member 353 is mounted in the barrel 350 behind the plug 12 and has a face thereon abutting the plug 12 to maintain it lengthwise of the barrel 350 as will become more apparent. The check member 353 defines a tamponading member receiving chamber 352 which opens onto the trailing end of the plug 12 and trailing end of the check member 353 is provided with a one-way gripping assembly 354 which grips the control member of the temporary sealing arrangement to allow the check member 353 to be moved along the control member toward the expanded tamponading member but prevents mov...

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PUM

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Abstract

A method of and apparatus for sealing access openings into blood vessels using an expandable member in the blood vessel on a control member that extends out through the access opening and an applicator which inserts a preformed sealing material into the access opening over the control member to keep the control member and expandable member centered in the access opening and withdrawing the collapsed expandable member back through the sealing material after the access opening is sealed.

Description

BACKGROUND OF THE INVENTION[0001]This invention relates generally to the stopping of bleeding from blood vessels through openings in the vessel wall and more particularly through surgically produced punctures for different medical procedures.[0002]Certain medical procedures require the percutaneous puncturing of a blood vessel to gain access to the interior of the vascular system of the patient for the procedure to be conducted. Procedures that commonly require such an percutaneous punctures are balloon angioplasty procedures, arteriography, venography, angiography and other diagnostic procedures that use blood vessel catheterization. Typically the percutaneous opening or puncture is made into a relatively large blood vessel such as a femoral artery. One of the difficulties in these procedures, however, is reclosure of the opening in the blood vessel wall after the procedure. In the past, manual pressure and / or mechanical clamping pressure have been used to physically hold the openi...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): A61B17/03A61B17/00
CPCA61B17/0057A61B2017/00637A61B2017/00672A61B2017/00659A61B2017/00654
InventorCATES, CHRISTOPHER U.KNOPF, WILLIAM D.WHITNEY, DOUGLASS G.
OwnerST JUDE MEDICAL