Method and apparatus for controlled vessel occlusion
First Claim
1. An apparatus comprising:
- a releasable latch positioning a proximal housing relative to a distal housing, the distal housing coupled to a syringe tube and the proximal housing coupled to a plunger, the plunger disposed within the syringe tube;
a screw mechanism coupling at least one of the syringe tube to the distal housing and the plunger to the proximal housing, to move the plunger along a length of the syringe tube;
wherein the latch defines a first latched position to removably lock the latch to locate the plunger at a first location along the length and a second latched position to removably lock the latch to locate the plunger at a different second location along the length proximal to the first location.
2 Assignments
0 Petitions
Accused Products
Abstract
A controlled volume inflation-deflation device to inflate a balloon to occlude a blood vessel by dialing a knob that locks at rotational positions to locate a plunger at equally spaced locations within a syringe of the inflation-deflation device. The inflation-deflation device includes a releasable latch to lock the proximal and distal housings together to hold the plunger forward for occlusion, and to separate and hold the proximal and distal housings to retract the plunger for perfusion. When the inflation-deflation device is returned to the-latched position, the balloon is re-inflated to its previous occlusive diameter. Also, an extension tube made of a lower modulus outer material co-extruded over and miscible with a higher modulus inner material may be used to produce a suitably low compliance extension tube for the inflation-deflation device. The balloon may have tapered ends and a cylindrical center portion so that it increases by more equal increments in outer diameter in response to incremental equal increases in inflation volume.
48 Citations
44 Claims
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1. An apparatus comprising:
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a releasable latch positioning a proximal housing relative to a distal housing, the distal housing coupled to a syringe tube and the proximal housing coupled to a plunger, the plunger disposed within the syringe tube;
a screw mechanism coupling at least one of the syringe tube to the distal housing and the plunger to the proximal housing, to move the plunger along a length of the syringe tube;
wherein the latch defines a first latched position to removably lock the latch to locate the plunger at a first location along the length and a second latched position to removably lock the latch to locate the plunger at a different second location along the length proximal to the first location. - 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)
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26. An apparatus comprising:
a flexible tube comprising;
a first end to attach and seal the tube to an output of a syringe tube;
a second end to couple the tube to an input adapter of a catheter;
an inner diameter sufficient to communicate fluid between the syringe tube and the input adapter to cause a volume of fluid to inflate a balloon attached to the catheter to occlude a blood vessel at a region of interest;
an inner material;
an outer material surrounding and extruded over the inner material;
wherein the inner material has a modulus greater than a modulus of the outer material. - View Dependent Claims (27, 28, 29)
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30. An apparatus comprising:
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a cannula having a dimension suitable for percutaneous advancement through a blood vessel, the cannula comprising a proximal and a distal end;
a balloon axially coupled to an exterior surface of the cannula at or adjacent the distal end of the cannula, the balloon comprising a property such that when inflated the balloon will expand in size to a plurality of relatively equally increasing outer diameters when inflated with a plurality of equally increasing inflation volumes over a range of outer diameters. - View Dependent Claims (31, 32, 33, 34)
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35. A method comprising:
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advancing a catheter percutaneously through a blood vessel to a region of interest, the catheter having a proximal end, a distal end, and an exterior surface at or adjacent the distal end of the catheter axially coupled to a balloon;
locking a latch in a first position to locate a plunger at a first location in a syringe tube;
pushing the plunger to a second location in the syringe tube to inflate the balloon to an inflation diameter;
transitioning the latch to a second position to locate the plunger at a different third location in the syringe tube to deflate the balloon. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification