SELF-EXPANDING CANNULA
First Claim
1. A system for fluid handling of a patient'"'"'s blood, comprising:
- a first cannula having a distal first cannula end and a proximal first cannula end opposite said distal first cannula end; and
a self-expanding wire frame having a distal wire frame end and a proximal wire frame end opposite said distal wire frame end, said proximal wire frame end being attached to said distal first cannula end, said wire frame being automatically expandable to a maximum diameter when positioned to collect blood from a patient'"'"'s body.
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Accused Products
Abstract
Disclosed is a self-expanding cannula, systems using such cannulae, and methods of their use. The cannulae may comprise single lumen cannula (SLC) configurations and double lumen cannula (DLC) configurations, and include at least a first cannula and a self-expanding wire frame attached to the first cannula. Self-expanding wire frame is automatically expandable from a compressed state (providing a reduced cannula diameter as it is moved through a patients body to the site at which it is to be deployed) to an expanded state (which increases the diameter of the cannula to the diameter intended for its normal use). The expanded wire frame provides radial support to prevent a drainage canal (whether a patients blood vessel or a portion of the system inserted into the patients blood vessel) from collapsing as fluid is drained from the patient.
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Citations
39 Claims
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1. A system for fluid handling of a patient'"'"'s blood, comprising:
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a first cannula having a distal first cannula end and a proximal first cannula end opposite said distal first cannula end; and a self-expanding wire frame having a distal wire frame end and a proximal wire frame end opposite said distal wire frame end, said proximal wire frame end being attached to said distal first cannula end, said wire frame being automatically expandable to a maximum diameter when positioned to collect blood from a patient'"'"'s body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system for fluid handling of a patient'"'"'s blood, comprising:
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a first cannula having a distal first cannula end and a proximal first cannula end opposite said distal first cannula end; and a self-expanding wire frame attached to said distal first cannula end, said wire frame being automatically expandable to a maximum diameter when positioned to collect blood from a patient'"'"'s body and in response to warming from a patient'"'"'s body temperature. - View Dependent Claims (21, 22, 23)
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24. A method for fluid handling of a patient'"'"'s blood, comprising the steps of:
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providing a first cannula having a distal first cannula end and a proximal first cannula end opposite said distal first cannula end, and a self-expanding wire frame attached to said distal first cannula end, said wire frame having a first diameter and being automatically expandable to a maximum diameter when positioned to collect blood from a patient'"'"'s body; positioning said first cannula and said wire frame inside of a blood vessel in a patient'"'"'s body at a position at which blood is to be withdrawn from the patient'"'"'s body, and so as to cause said wire frame to automatically expand to said maximum diameter, wherein said maximum diameter is sufficient to prevent collapse of the blood vessel during suctioning of blood from the blood vessel; and suctioning blood from the blood vessel through said wire frame and said first cannula. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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Specification