US3712290A — Apparatus for intra-aortal balloon pulsation

Claim 1

Independent Claim 157 words

An apparatus for aiding the heart in its pulsation wherein a balloon means is inserted into the aorta and which is inflated and deflated in accordance with the diastolic and systolic cycles of the heart comprising a chamber means having a pumping chamber, means connecting said pumping chamber with the balloon means, and a driving chamber, a source of excess pressure and a source of low pressure, means for alternately coupling said source of excess pressure and said source of low pressure to said driving chamber, a membrane means separating said pumping chamber and said driving chamber, said chamber including means for positioning and controlling the size of the membrane means for pumping the entire volume of said pumping chamber into said balloon means during the phase when said source of high pressure is connected and for driving the entire volume of said driving chamber into said low pressure source when said low pressure source is connected.

Claim 2

Independent Claim 157 words

An apparatus for aiding the heart in its pulsation wherein a balloon means is inserted into the aorta and which is inflated and deflated in accordance with the diastolic and systolic cycles of the heart comprising a chamber means having a pumping chamber, means connecting said pumping chamber with the balloon means, and a driving chamber, a source of excess pressure and a source of low pressure, means for alternately coupling said source of excess pressure and said source of low pressure to said driving chamber, a membrane means separating said pumping chamber and said driving chamber, said chamber including means for positioning and controlling the size of the membrane means for pumping the entire volume of said pumping chamber into said balloon means during the phase when said source of high pressure is connected and for driving the entire volume of said driving chamber into said low pressure source when said low pressure source is connected.

Claim 3

Dependent Claim 31 words

The apparatus as claimed in claim 1, wherein means are provided for adjusting the volume of said pumping chamber, and means are provided for adjusting the volume of said driving chamber.

Claim 4

Dependent Claim 70 words

The apparatus as claimed in claim 1, wherein said membrane is made from a foil of synthetic material and is adapted to abut against the wall portion of said pumping chamber when said high pressure source is operated and, to lie against the wall portions of said driving chamber when said low pressure source is operated, the flexing of said membrane means occurring in A very short period of time.

Claim 5

Dependent Claim 26 words

The apparatus as claimed in claim 1, wherein said membrane means is made from a foil of polyurethane material having a wall thickness of about 0.2mm.

Claim 6

Dependent Claim 41 words

The apparatus as claimed in claim 1, wherein said balloon means connecting said balloon to said pumping chamber, and said pumping chamber constitute a balloon circuit and are filled with a gas which is capable of being resorbed by the blood.

Claim 7

Dependent Claim 16 words

The apparatus as claimed in claim 5, wherein said gas filling the balloon circuit is acetylen.

Claim 8

Dependent Claim 87 words

The apparatus as claimed in claim 1, wherein said means for alternately coupling said high and low pressure sources to said driving chamber comprises a pair of two-way valves, a pair of conduits each leading to one of said pressure sources, one of said valves being associated with a predetermined one of said pressure sources, and means for controlling the alternate opening and closing of said valve means so that at one instant of the time only one of said sources is connected to said driving chamber.

Claim 9

Dependent Claim 44 words

The apparatus as claimed in claim 7, wherein said controlling means is operating said pair of valve means in accordance with the heart beat and includes means for electrically picking up the heart rate during the systolic and diastolic cycles of the heart operation.

Claim 10

Dependent Claim 118 words

The apparatus as claimed in claim 1, wherein said chamber comprises a hollow cylinder having means closing one end thereof, and insert means being inserted into said hollow cylinder at the other end thereof, said membrane means extending along said insert means and the wall portions of said hollow cylinder and being secured at the closed end of said hollow cylinder, said membrane means being a hose-shaped flexible material, said membrane means with its inside wall portions defining said driving chamber, said closing means of said hollow cylinder communicating said driving chamber with said high or low pressure source, the outer side of said membrane means with the wall portions of said hollow cylinder defining said pumping chamber.

Claim 11

Dependent Claim 113 words

The apparatus as claimed in claim 9, wherein said insert means comprises an outer hollow cylinder and an inner cylinder, thread means on said outer cylinder of said insert means and thread means on said inner cylinder of said insert means, said outer cylinder and said inner cylinder being movable along a common axis over said cooperating thread means of the respective cylinders, a ring-like projection on said inner cylinder of said insert means, sealing means provided between said outer and said inner cylinder of said insert means, said insert means being movable axially in said hollow cylinder of said chamber for adjusting thereby the volume of said pumping and said driving chambers.

Claim 12

Dependent Claim 42 words

The apparatus as claimed in claim 10, wherein said outer hollow cylinder of said chamber has groove means formed on the inner wall thereof, said sealing means being forced into said groove means and defining predetermined volume positions of said insert means.

Claim 13

Dependent Claim 56 words

The apparatus as claimed in claim 11, wherein said insert means comprises a piston means, said means being mounted coaxially with said insert means, the front portion of said piston means communicating with said driving chamber, means for adjusting the position of said piston means thereby adjusting the volume of said pumping and said driving chamber.

Claim 14

Dependent Claim 63 words

The apparatus as claimed in claim 12, wherein said means for adjusting said position of said piston means comprises a threaded bar means passing through a threaded passage in said inner hollow cylinder of said insert means, and an indicating operating means at the end of said threaded bar means for indicating the fine adjustment to said driving chamber and said pumping chamber.

Claim 15

Dependent Claim 153 words

A separating device for separating the driving and pumping circuits in an apparatus for aiding the heart in its pulsation wherein a balloon means is inserted into the aorta and which is inflated and deflated in accordance with the diastolic and systolIc cycles of the heart, said separating device having a pumping chamber adapted to be connected with the balloon, and a driving chamber adapted to be connected to a source of excess pressure or to a source of low pressure, a membrane means separating said pumping chamber and said driving chamber, said chamber including means for positioning and controlling the size of the membrane means for pumping the entire volume of said pumping chamber when connected to said balloon during the phase when said source of high pressure is connected and for driving the entire volume of said driving chamber into said low pressure source when connected to said low pressure source.

Claim 16

Dependent Claim 153 words

A separating device for separating the driving and pumping circuits in an apparatus for aiding the heart in its pulsation wherein a balloon means is inserted into the aorta and which is inflated and deflated in accordance with the diastolic and systolIc cycles of the heart, said separating device having a pumping chamber adapted to be connected with the balloon, and a driving chamber adapted to be connected to a source of excess pressure or to a source of low pressure, a membrane means separating said pumping chamber and said driving chamber, said chamber including means for positioning and controlling the size of the membrane means for pumping the entire volume of said pumping chamber when connected to said balloon during the phase when said source of high pressure is connected and for driving the entire volume of said driving chamber into said low pressure source when connected to said low pressure source.

Claim 17

Dependent Claim 32 words

The separating device as claimed in claim 14, wherein means are provided for adjusting the volume of said pumping chamber, and means are provided for adjusting the volume of said driving chamber.

Claim 18

Dependent Claim 71 words

The separating device as claimed in claim 14, wherein said membrane is made from a foil of synthetic material and is adapted to abut against the wall portion of said pumping chamber when said high pressure source is operated and, to lie against the wall portions of said driving chamber when said low pressure source is operated, the flexing of said membrane means occurring in a very short period of time.

Claim 19

Dependent Claim 27 words

The separating device as claimed in claim 14, wherein said membrane means is made from a foil of polyurethane material having a wall thickness of about 0.2mm.

Claim 20

Dependent Claim 122 words

The separating device as claimed in claim 14, wherein said separating device comprises a hollow cylinder having means closing one end thereof, and insert means being inserted into said hollow cylinder at the other end thereof, said membrane means extending along said insert means and the wall portions of said hollow cylinder and being secured at the closed end of said hollow cylinder, said membrane means being a hose-shaped flexible material, said membrane means with its inside wall portions defining said driving chamber, said closing means of said hollow cylinder adapted to communicate said driving chamber with said high or low pressure source, the outer side of said membrane means with the wall portions of said hollow cylinder defining said pumping chamber.

Claim 21

Dependent Claim 114 words

The separating device as claimed in claim 18, wherein said insert means comprises an outer hollow cylinder and an inner cylinder, thread means on said outer cylinder of said insert means and thread means on said inner cylinder of said insert means, said outer cylinder and said inner cylinder being movable along a common axis over said cooperating thread means of the respective cylinders, a ring-like projection on said inner cylinder of said insert means, sealing means provided between said outer and said inner cylinder of said insert means, said insert means being movable axially in said hollow cylinder of said chamber for adjusting thereby the volume of said pumping and said driving chambers.

Claim 22

Dependent Claim 43 words

The separating device as claimed in claim 19, wherein said outer hollow cylinder of said chamber has groove means formed on the inner wall thereof, said sealing means being forced into said groove means and defining predetermined volume positions of said insert means.

Claim 23

Dependent Claim 59 words

The separating device as claimed in claim 20, wherein said insert means comprises a piston means, said piston means being mounted coaxially with said insert means, the front portion of said piston means communicating with said driving chamber, means for adjusting the position of said piston means thereby adjusting the volume of said pumping chamber and said driving chamber.

Claim 24

Dependent Claim 64 words

The separating device as claimed in claim 21, wherein said means for adjusting said position of said piston means comprises a threaded bar means passing through a threaded passage in said inner hollow cylinder of said insert means, and an indicating operating means at the end of said threaded bar means for indicating the fine adjustment to said driving chamber and said driving chamber.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1976-01-23	1976-07-24	1977-01-23	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1980-01-23	1980-07-24	1981-01-23	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1984-01-23	1984-07-24	1985-01-23	$7700.00	Window Closed / Lapsed

Apparatus for intra-aortal balloon pulsation

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