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US20050020973A1 Expired / Lapsed US ⏱️ 0.0 years remaining

Fluid exchange system for controlled and localized irrigation and aspiration

Assignee: Fox Hollow Technologies Inc
•
Filing: 2004-07-30
•
Granted: —
•
Expires: 2024-07-30
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Abstract

Abstract The control of fluid introduction into and out of body conduits such as vessels, is of great concern in medicine. As the development of more particular treatments to vessels and organs continues it is apparent that controlled introduction and removal of fluids is necessary. Fluid delivery and removal from such sites, usually referred to as irrigation and aspiration, using fluid exchange devices that control also need to be considerate of potential volume and/or pressure in the vessel or organ are described together with catheter and lumen configurations to achieve the fluid exchange. The devices include several electrically or mechanically controlled embodiments and produce both controlled and localized flow with defined volume exchange ratios for fluid management. The applications in medicine include diagnostic, therapeutic, imaging, and uses for the introduction or removal of concentrations of emboli within body cavities.

Inventors

  • 👤 John MacMahon
  • 👤 Thomas Goff
  • 👤 Brian Courtney

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 04:08
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/64; A61M1/67; A61M1/80; A61M1/81; A61M1/71; A61M1/77; A61M1/774

Claims Analysis

Total Claims: 17
Claim 1
Independent Claim 5 words
1 - 24 . (canceled)
Claim 2
Dependent Claim 5 words
1 - 24 . (canceled)
Claim 3
Dependent Claim 191 words
25 . A method for achieving fluid exchange within a localized region of the body comprising: introducing a catheter element into the body wherein the catheter element is comprised of an irrigation lumen terminating with at least one irrigation port at a distal end of the catheter element and an aspiration lumen terminating with at least one aspiration port; advancing the distal end of the catheter element to the localized region of the body; activating a trigger of a fluid exchange apparatus comprising an irrigation reservoir in fluid connection with the irrigation lumen and having means for controlled delivery of irrigant fluid from the irrigation reservoir through the irrigation lumen to the localized region and an aspiration lumen having means for controlled collection of aspirant fluid, wherein the activating step produces a controlled delivery of irrigant fluid from the irrigation reservoir through the irrigation lumen and wherein a mechanical linkage causes removal of aspirant fluid from the localized region through the aspiration lumen; and wherein this step of activating the trigger produces turbulent fluid exchange at the target site from the simultaneous delivery of irrigant fluid and removal of aspirant fluid.
Claim 4
Dependent Claim 191 words
25 . A method for achieving fluid exchange within a localized region of the body comprising: introducing a catheter element into the body wherein the catheter element is comprised of an irrigation lumen terminating with at least one irrigation port at a distal end of the catheter element and an aspiration lumen terminating with at least one aspiration port; advancing the distal end of the catheter element to the localized region of the body; activating a trigger of a fluid exchange apparatus comprising an irrigation reservoir in fluid connection with the irrigation lumen and having means for controlled delivery of irrigant fluid from the irrigation reservoir through the irrigation lumen to the localized region and an aspiration lumen having means for controlled collection of aspirant fluid, wherein the activating step produces a controlled delivery of irrigant fluid from the irrigation reservoir through the irrigation lumen and wherein a mechanical linkage causes removal of aspirant fluid from the localized region through the aspiration lumen; and wherein this step of activating the trigger produces turbulent fluid exchange at the target site from the simultaneous delivery of irrigant fluid and removal of aspirant fluid.
Claim 5
Dependent Claim 32 words
26 . The method of claim 25 wherein irrigant fluid is contained in a cylinder with a dedicated piston and the activating step forces fluid from the cylinder through the irrigation lumen.
Claim 6
Dependent Claim 33 words
27 . The method of claim 25 wherein the activation step collects aspirant fluid from the target site through the aspiration lumen and passes the aspirant into a cylinder with a dedicated piston.
Claim 7
Dependent Claim 19 words
28 . The method of claim 26 further comprising the step of providing irrigant fluid in a replaceable syringe.
Claim 8
Dependent Claim 42 words
29 . The method of claim 25 further comprising inflating an occluding element proximal of the at least one irrigation port and the at least one aspiration port such that substantially all of the fluid exchange occurs distal of the occluding element.
Claim 9
Dependent Claim 17 words
30 . The method of claim 29 wherein the inflating step is comprised of inflating a balloon.
Claim 10
Dependent Claim 39 words
31 . The method of claim 25 wherein the irrigant fluid is introduced through an irrigation chamber having an inflow line in fluid communication with the irrigation reservoir and an outflow line in fluid communication with the irrigation lumen.
Claim 11
Dependent Claim 39 words
32 . The method of claim 25 wherein the aspirant fluid is removed through an aspiration chamber having an inflow line in fluid communication with the aspiration lumen and an outflow line in fluid communication with the aspiration reservoir.
Claim 12
Dependent Claim 14 words
33 . The method of claim 25 wherein the trigger is activated by hand.
Claim 13
Dependent Claim 20 words
34 . The method of claim 27 wherein the trigger is integrally connected to the cylinder and the dedicated piston.
Claim 14
Dependent Claim 30 words
35 . The method of claim 25 wherein the aspirant fluid passes through at least one one-way valve in the fluid pathway of the aspiration lumen and the aspiration reservoir.
Claim 15
Dependent Claim 32 words
36 . The method of claim 25 wherein the step of activating the trigger achieves a predetermined ratio of fluid volume exchange between irrigant fluid and aspirant fluid at the target site.
Claim 16
Dependent Claim 14 words
37 . The method of claim 36 wherein the predetermined ratio is approximately 1:1.
Claim 17
Dependent Claim 18 words
38 . The mechanical device of claim 36 wherein the predetermined ratio is between approximately 1:2 and 2:1.

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