Perfusion shunt apparatus and method
First Claim
1. A perfusion shunt apparatus for use in a body passage, comprising:
- a catheter shaft;
an expandable shunt conduit mounted on said catheter shaft, said expandable shunt conduit having an upstream end and a downstream end and an internal lumen, said expandable shunt conduit having a collapsed position in which said expandable shunt conduit is collapsed toward said catheter shaft and an expanded position in which said internal lumen of said expandable shunt conduit is open to fluid flow;
an upstream sealing member at said upstream end of said expandable shunt conduit for creating a seal between said upstream end of said expandable shunt conduit and an internal wall of the body passage;
a perfusion lumen within said catheter shaft in fluid communication with a space exterior to said expandable shunt conduit; and
an occlusion member for selectively occluding said internal lumen of said expandable shunt conduit.
1 Assignment
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Accused Products
Abstract
A perfusion shunt apparatus and methods are described for isolating and selectively perfusing a segment of a patient'"'"'s cardiovascular system and for directing circulatory flow around the isolated segment. An aortic perfusion shunt apparatus is configured for deployment within a patient'"'"'s aortic arch and methods are described for isolating the aortic arch vessels from the aortic lumen, for selectively perfusing the arch vessels with a fluid and for directing blood flow within the aortic lumen through a shunt past the isolated arch vessels. The perfusion shunt apparatus may be mounted on a catheter or cannula for percutaneous introduction or for direct insertion into a circulatory vessel, such as the aorta. The perfusion shunt apparatus has application for protecting a patient from embolic stroke or hypoperfusion during cardiopulmonary bypass or cardiac surgery and also for selectively perfusing the cerebrovascular circulation with oxygenated blood or with neuroprotective fluids in the presence of risk factors, such as head trauma or cardiac insufficiency. The perfusion shunt apparatus will also find application for selective perfusion of other organ systems within the body.
210 Citations
54 Claims
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1. A perfusion shunt apparatus for use in a body passage, comprising:
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a catheter shaft; an expandable shunt conduit mounted on said catheter shaft, said expandable shunt conduit having an upstream end and a downstream end and an internal lumen, said expandable shunt conduit having a collapsed position in which said expandable shunt conduit is collapsed toward said catheter shaft and an expanded position in which said internal lumen of said expandable shunt conduit is open to fluid flow; an upstream sealing member at said upstream end of said expandable shunt conduit for creating a seal between said upstream end of said expandable shunt conduit and an internal wall of the body passage; a perfusion lumen within said catheter shaft in fluid communication with a space exterior to said expandable shunt conduit; and an occlusion member for selectively occluding said internal lumen of said expandable shunt conduit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method of perfusing a branch vessel in fluid communication with a main vessel in a body of a patient, comprising:
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inserting a perfusion shunt catheter into the main vessel; expanding a shunt conduit mounted on said perfusion shunt catheter to open an internal lumen within said shunt conduit to fluid flow; sealing an upstream end of said expandable shunt conduit to an internal wall of the main vessel upstream of the branch vessel; perfusing the branch from a perfusion lumen in fluid communication with a space exterior to said shunt conduit. perfusing the branch vessel from a perfusion lumen in fluid communication with a space exterior to said shunt conduit. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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51. A perfusion shunt apparatus for us in a body passage, comprising:
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a catheter shaft; an expandable shunt conduit mounted on said catheter shaft, said expandable shunt conduit having a collapsed position in which said expandable shunt conduit is collapsed toward said catheter shaft and an expanded position in which said internal lumen of said expandable shunt conduit is open to fluid flow and wherein said expandable shunt conduit further comprises at least one longitudinal support member attached to a wall of said expandable shunt conduit; an upstream sealing member at said upstream end of said expandable shunt conduit for creating a seal between said upstream end of said expandable shunt conduit and an internal wall of the body passage; and a perfusion lumen for within said catheter shaft in fluid communication with a space exterior to said expandable shunt conduit.
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52. A perfusion shunt apparatus for use in a body passage, comprising:
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a catheter shaft; an expandable shunt conduit mounted on said catheter shaft, said expandable shunt conduit having an upstream end and a downstream end and in internal lumen, said expandable shunt conduit having a collapsed position in which said expandable shunt conduit is collapsed toward said catheter shaft and an expanded position in which said internal lumen of said expandable shunt conduit is open to fluid flow and wherein said expanded shunt conduit further comprises a wall of porous fabric enclosing said internal lumen; an upstream sealing member at said upstream end of said expandable shunt conduit for creating a seal between said upstream end of said expandable shunt conduit and an internal wall of the body passage; and a perfusion lumen for within said catheter shaft in fluid communication with a space exterior to said expandable shunt conduit. - View Dependent Claims (53)
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54. A method of perfusing a branch vessel in fluid communication with a main vessel in a body of a patient, comprising:
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inserting a perfusion shunt catheter into the main vessel; expanding a shunt conduit mounted on said perfusion shunt catheter to open an internal lumen within said shunt conduit to fluid flow; sealing an upstream end of said expandable shunt conduit to an internal wall of the main vessel upstream of the branch vessel; filtering fluid flow passing through said internal lumen of said shunt conduit; and perfusing the branch vessel from a perfusion lumen in fluid communication with a space exterior to said shunt conduit.
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Specification