Integrated controlled volume inflator device, components, and methods of use

Patent metadata

Field	Value
Publication number	US-9522257-B2
Application number	US-201213436724-A
Country	US
Kind code	B2
Filing date	Mar 30, 2012
Priority date	Mar 30, 2012
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

A controlled pressure inflation-deflation device inflates a balloon to occlude a blood vessel by moving a large plunger to provide incremental pressure increases within a syringe. A releasable latch moves a second plunger, positioned within a syringe formed by an inner columnar opening in the large plunger, between an occlusion position and a perfusion position. A three-position switch has a release position to allow the large plunger to move freely, an adjust position to provide the incremental pressure increases, and a lock position to lock the location of the plunger. Pressures at which various balloons (e.g., folded balloons) achieve or nearly achieve a substantially circular cross-section may be extrapolated by inflating balloons with pressures equal and/or greater than the first occlusion pressure. Balloons may be pre-inflated up to or below the first occlusion pressure to achieve a substantially circular cross-section, prior to increasing the balloon to an occlusion pressure.

First claim

What is claimed is:

1. Apparatus comprising:
a releasable latch positioning a proximal housing relative to a distal housing, the distal housing coupled to a syringe barrel and a rotational knob coupled to the distal housing;
at least one plunger disposed within the syringe barrel, wherein the rotational knob is coupled to the plunger by a screw mechanism to move the plunger along a length of the syringe barrel when the rotational knob is rotated, the screw mechanism having a rotational lock to prevent the plunger from moving when in a locked position;
wherein the latch defines an occlusion position to releasably lock the plunger at a first location along the length of the syringe and a perfusion position to releasably lock the plunger at a second location along the length proximal to the occlusion location; and
a three-position switch coupled to the screw mechanism, the switch comprising a release position, an adjust position that allows the rotational knob to rotate, and a lock position, wherein the lock position is adjacent to the adjust position.

2. The apparatus of claim 1 wherein the rotational knob is a first knob and the latch comprises a second knob that when pulled away from the distal housing puts the latch in the perfusion position and that when pushed towards the distal housing puts the latch in the occlusion position, wherein when in the perfusion position, the lock is able to resist at least 1.5 ATM of back pressure, and wherein when in the occlusion position, the lock is able to resist at least 6 ATM of back pressure.

3. The apparatus of claim 2 wherein when the plunger is located along the length of the syringe barrel, the occlusion position and the perfusion position define two position locations within the syringe to repeatedly cause: 1) a volume of fluid to be drawn into the syringe when the latch is pulled into the perfusion position, and 2) then the volume of fluid to be pushed out of the syringe when the latch is returned to the occlusion position.

4. The apparatus of claim 2 wherein the screw mechanism includes a plurality of incremental pressure or volume positions that locate the plunger at a plurality of locations along the length of the syringe that cause incremental and equal increases or decreases in pressure or volume output by the syringe when the syringe is filled with fluid and the plunger is transition between the positions.

5. The apparatus of claim 1 wherein when in the adjust position, the lock allows the plunger to move to a plurality of positions in response to a rotational force applied to the knob, but prevents the plunger from moving in response to the back pressure applied to a head of the plunger.

6. An apparatus comprising:
a distal housing coupled to a syringe barrel;
a rotational knob coupled to the distal housing;
a screw mechanism coupling the rotational knob to a plunger within the syringe barrel to move the plunger along a length of the syringe barrel, the screw mechanism having a rotational lock to prevent the plunger from moving when in a locked position;
a three-position switch coupled to the screw mechanism, the switch comprising a release position, an adjust position that allows the rotational knob to rotate, and a lock position, wherein the lock position is adjacent to the adjust position.

7. The apparatus of claim 6 wherein when in the locked position, the switch prevents the knob from rotating.

8. The apparatus of claim 7 wherein when in the locked position, the lock prevents the plunger from moving in response to at least 6 ATM of back pressure applied to a head of the plunger, and prevents the knob from rotating in response to a rotational force applied to the knob or in response to the back pressure applied to a head of the plunger;
wherein when in the release position, the lock allows the plunger to move in response to a back pressure applied to the plunger head or a rotational force applied to the knob; and
wherein when in the adjust position, the lock allows the plunger to move to a plurality of positions in response to a rotational force applied to the knob, but prevents the plunger from moving in response to the back pressure applied to a head of the plunger.

9. The apparatus of claim 8 wherein when in the adjust position the plunger may be moved to a plurality of incremental position locations along a length of the syringe barrel in response to a rotational force applied to the knob, the positions causing equal changes in pressure or volume to be output by the syringe when the syringe is filled with a liquid.

10. The apparatus of claim 6 wherein the switch can be transitioned between the adjust position and the locked position without entering the release position.

11. The apparatus of claim 6 wherein the switch comprises a single switch having the adjust position located between the release position and the locked position, or the locked position located between the release position and the adjust position.

12. The apparatus of claim 6 wherein when in the adjust position, the lock allows the plunger to move to a plurality of positions in response to a rotational force applied to the knob, but prevents the plunger from moving in response to the back pressure applied to a head of the plunger.

13. An apparatus comprising:
a releasable latch positioning a proximal housing relative to a distal housing, the distal housing coupled to a first syringe barrel;
a first plunger within the first syringe barrel, the first plunger coupled to a first shaft defining a second syringe barrel within the first shaft;
a screw mechanism coupling the second syringe barrel and the first plunger to a rotating knob of the proximal housing to move the first plunger along a length of the first syringe barrel when the knob is rotated;
the releasable latch coupling the proximal housing to the second plunger, and to repeatedly position the second plunger within the second syringe barrel to repeatedly: 1) releasably lock the second plunger at a first location along a length of the second syringe barrel, and 2) to releasably lock the second plunger at a second location along a length of the second syringe barrel.

14. The apparatus of claim 13 wherein the screw mechanism moves the first plunger to locations within the first syringe barrel that provide equal pressures or volume increases in the first syringe barrel.

15. The apparatus of claim 13 wherein the first plunger and the screw mechanism are configured to increase a pressure or volume of fluid in the syringe to a pressure or volume to cause a balloon to occlude a flow of blood in a human blood vessel, and wherein the second plunger and the releasable latch are configured to repeatedly translate the second plunger between the first latched position to cause perfusion and the second latched position to cause re-occlusion of the blood vessel.

16. An apparatus comprising:
a releasable latch positioning a proximal housing relative to a distal housing, the distal housing coupled to a syringe barrel and a rotational knob coupled to the distal housing; and
at least one plunger disposed within the syringe barrel, wherein the rotational knob is coupled to the plunger by a screw mechanism to move the plunger along a length of the syringe barrel when the rotational knob is rotated, the screw mechanism having a rotational lock to prevent the plunger from moving when in a locked position;
wherein the latch defines an occlusion position to releasably lock the plunger at a first location along the length of the syringe and a perfusion position to releasably lock the plunger at a second location along the le

Assignees

• Webler William E
• Abbott Cardiovascular Systems Inc

Inventors

• Webler William E

Classifications

• A61M25/10182 Primary

  Injector syringes · CPC title

• A61M25/10187

  Indicators for the level of inflation or deflation · CPC title