INTRA-AORTIC DUAL BALLOON PUMP CATHETER DEVICE

Abstract

The present invention relates to an intra-aortic dual balloon pump catheter device. The intra-aortic dual balloon pump comprises: a catheter (2); a first balloon (4) and a second balloon (6) arranged to successively surrounding the catheter along the longitudinal direction of the catheter (2), wherein the position of the first balloon (4) is closer to a catheter end (5) of the catheter (2) than the position of the second balloon (6); the first balloon (4) and the second balloon (6) are periodically expanded to a dimension that blocks the aortic blood flow and contracted to a dimension that does not prevent the blood flow from passing through; wherein the first balloon (4) begins and finishes the inflation earlier than the second balloon (6) in each period of expansion and contraction.

Claims

1. An intra-aortic dual balloon pump catheter device, which comprises: a catheter; a first balloon and a second balloon, arranged to successively surrounding the catheter along the longitudinal direction of the catheter, wherein the position of the first balloon is closer to a catheter end of the catheter than the position of the second balloon; a monitoring part, for monitoring the cardiac cycle and the arterial pressure of the catheter end; air pumps, respectively mated with the first balloon and the second balloon, for supplying and withdrawing air; a first intake pipe and a second intake pipe, one end of which is in communication with the first balloon and the second balloon respectively, and the other end of which is in communication with the respectively mated air pump; a controlling part, adapted to control the air pumps to inflate and deflate the first balloon and the second balloon according to the cardiac cycle and the arterial pressure of the catheter end monitored by the monitoring part, such that the first balloon and the second balloon are periodically expanded to a dimension that blocks the aortic blood flow and contracted to a dimension that does not prevent the blood flow from passing through; wherein the air pumps are controlled such that the first balloon begins and finishes the inflation earlier than the second balloon in each period of expansion and contraction.

2. The intra-aortic dual balloon pump catheter device according to claim 1, wherein the air pumps are controlled such that the second balloon begins to be inflated after the first balloon finishes inflation.

3. The intra-aortic dual balloon pump catheter device according to claim 1, wherein the air pumps are controlled such that the second balloon begins to be inflated before the first balloon finishes inflation.

4. The intra-aortic dual balloon pump catheter device according to claim 1, wherein the air pumps are controlled such that the first balloon and the second balloon are contracted at the same time.

5. The intra-aortic dual balloon pump catheter device according to claim 1, wherein the first intake pipe surrounds the catheter and extends together therewith through the second balloon.

6. The intra-aortic dual balloon pump catheter device according to claim 5, wherein, after extending through the second balloon, the first intake pipe and the catheter surrounded by the first intake pipe extend in parallel with the second intake pipe.

7. The intra-aortic dual balloon pump catheter device according to claim 1, wherein, after extending through the second balloon, the first intake pipe is surrounded by and extends together with the second intake pipe.

8. The intra-aortic dual balloon pump catheter device according to claim 1, wherein, after extending through the second balloon respectively, the catheter and the first intake pipe extend in parallel with the second intake pipe.

9. The intra-aortic dual balloon pump catheter device according to claim 1, wherein the first balloon has a length less than that of the second balloon.

10. The intra-aortic dual balloon pump catheter device according to claim 1, wherein the first balloon has a length that is one-tenth of a total length of the first balloon and the second balloon.

11. The intra-aortic dual balloon pump catheter device according to claim 5, wherein, after extending through the second balloon, the first intake pipe is surrounded by and extends together with the second intake pipe.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG. 1 shows an intra-aortic balloon pump catheter device of the prior art, which has only one balloon;

[0020] FIG. 2 shows a partial section view of an intra-aortic dual balloon pump catheter device according to the first embodiment of the present invention;

[0021] FIG. 3 shows a partial section view of an intra-aortic dual balloon pump catheter device according to the second embodiment of the present invention;

[0022] FIG. 4 shows a cross section view seen from line A-A in FIG. 3.

LIST OF REFERENCE SIGN

[0023] 1 guide wire [0024] 2 catheter [0025] 3 first intake pipe [0026] 4 first balloon [0027] 5 catheter end [0028] 6 second balloon [0029] 7 second intake pipe

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] The intra-aortic dual balloon pump catheter device of the present invention will be described in detailed embodiments with reference to the accompanying drawings. It shall be noted that the accompanying drawings are given by way of illustration only, and shall not be construed as limiting the present invention.

[0031] The intra-aortic dual balloon pump catheter device is guided by a guide wire 1 of a catheter 2 and reaches a predetermined position within the aorta, and then the guide wire 1 exits from the catheter 2.

[0032] FIG. 2 shows a partial section view of an intra-aortic dual balloon pump catheter device according to the first embodiment of the present invention. As shown in the figure, a first balloon 4 and a second balloon 6 are arranged to successively surrounding the catheter 2 along the longitudinal direction of the catheter 2, wherein the position of the first balloon 4 is closer to a catheter end 5 than the position of the second balloon 6. A first intake pipe 3 and a second intake pipe 7 have one end in communication with the first balloon 4 and the second balloon 6 respectively, and the other end in communication with the air pump (not shown) respectively mated with the balloons and used for supply and withdrawal of air.

[0033] The intra-aortic dual balloon pump catheter device according to the first embodiment of the present invention further comprises a monitoring part and a controlling part that are not shown in the figure. The monitoring part is used for monitoring the cardiac cycle and the arterial pressure of the catheter end 5, while the controlling part is adapted to control the air pumps to inflate and deflate the first balloon 4 and the second balloon 6 according to the cardiac cycle and the arterial pressure of the catheter end 5 monitored by the monitoring part, such that the first balloon 4 and the second balloon 6 are periodically expanded to a dimension that blocks the aortic blood flow and contracted to a dimension that does not prevent the blood flow from passing through.

[0034] In this embodiment, the first intake pipe 3 protruding from the first balloon 4 surrounds and extends together with the catheter 2 through the second balloon 6, and then extends in parallel with the second intake pipe 7 protruding from the second balloon 6. An air pump mated with the first intake pipe 3 and the second intake pipe 7 respectively may supply, for example, helium gas into the first balloon 4 and the second balloon 6 to inflate the latter. The whole process of inflation is required to be completed within 130 ms. However, the air pumps are controlled such that the first balloon 4 begins and finishes the inflation earlier than the second balloon 6 in each period of expansion and contraction.

[0035] In diastole, the first balloon 4 begins and finishes the inflation earlier than the second balloon 6. The inflation of the first balloon 4 per se drives the blood to both the distal and the proximal sides of the aorta, so that the diastolic pressure at the aortic root is increased, thereby increasing the coronary artery blood and myocardial oxygen supply, while promoting the blood perfusion to the whole body. Then, the first balloon 4 that is firstly inflated blocks the upstream blood and squeezes the downstream blood, and the second balloon 6 that is subsequently inflated further enhances the squeezing effect on the downstream blood because the upstream has already been blocked by the first balloon 4.

[0036] Before the systole is about to begin, the air pump withdraws the air from the first balloon 4 and the second balloon 6 so that the balloons are contracted at the same time. The blood is withdrawn by the negative pressure and enters into the cavity produced by the contraction, whereby the ejection resistance and the cardiac afterload are lowered, and the cardiac output is increased.

[0037] Herein, the air pumps are controlled such that the second balloon 6 begins to be inflated after the first balloon 4 finishes inflation. However, the air pumps may also be controlled such that the second balloon 6 begins to be inflated before the first balloon 4 finishes inflation. The desired technical effect may be achieved as long as the first balloon 4 finishes the inflation process prior to the second balloon 6.

[0038] FIG. 3 shows a partial section view of an intra-aortic dual balloon pump catheter device according to the second embodiment of the present invention. FIG. 4 shows a cross section view seen from line A-A in FIG. 3. It differs from the first embodiment of the present invention in that: the first intake pipe 3 protruding from the first balloon 4 does not surround the catheter 2 through the first balloon 4 and the second balloon 6, but passes through the second balloon 6 individually. The first intake pipe 3 through the second balloon 6, the catheter 2, and the second intake pipe 7 protruding from the second balloon 6 extend in parallel with each other as shown in the figure.

[0039] While the present invention has been described with reference to the preferred embodiments, the spirit and scope of the invention are not limited to the disclosure herein. According to the teaching of the present invention, those skilled in the art are able to deduce more embodiments and applications without departing from the spirit and scope of the present invention, which are not defined by the embodiments but by the appended claims.