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Blood circulation assistance device

An auxiliary equipment and blood technology, which is applied in the direction of circulatory assistance devices, mechanical equipment, blood pumps, etc., can solve the problem of how to reverse the flow of the hydraulic drive medium that has not been disclosed, and achieve the effect of wide application range and rapid curative effect

Inactive Publication Date: 2006-12-13
黑尔菲尔德心脏医疗设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this document does not disclose how the hydraulic drive medium flows in reverse, which is very important for the effective implementation of counterpulsation

Method used

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  • Blood circulation assistance device
  • Blood circulation assistance device
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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0205] It is worth noting that in the above results, the tested intra-aortic balloon discharged 40ml of blood per compression, while the external aortic counterpulsator only discharged 20ml of blood per compression. Therefore, the external aortic counterpulsator provides a greater percentage change per ml of blood injected than the intra-aortic balloon.

[0206] Figure 16 Output pressure curves for intra-aortic balloon (IAB) experiments are shown, Figure 17 The pressure curve of the external aortic counterpulsator. It can be seen that the external aortic counterpulsation increases the pressure in diastole to a similar extent as the intra-aortic balloon.

example 2

[0209] Bpm = heartbeat per minute

[0210] T F = Total coronary flow (liters per minute)

[0211] From Figure 19 and 20 It can be seen from the comparison that the external aortic counterpulsator can produce the same pressure increase as the intra-aortic balloon during diastole. Thus, this example demonstrates that an external aortic counterpulsation device can generate sufficient counterpulsation to produce good results in this therapeutic condition.

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PUM

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Abstract

A blood circulation assistance device (1) is disclosed for location around a blood conduit (20). The device comprises: an inflatable bladder (10) moveable between a contracted form and an expanded form, for compressing the blood conduit (20) to provide counter-pulsation. Pump means (30) in fluid communication with the bladder (10) move the bladder (10) from the contracted form to the expanded form. The pump means (30) comprises a centrifugal impeller (not shown) rotatable about an axis to effect pumping. The impeller is moveable axially between first and second positions to effect a reversal of the direction of pumping. Control means (50), in communication with the pump means, is capable of monitoring the cardiac cycle of an individual and triggering the pump means (30) to move the bladder (10) to the expanded form at diastole. An outer cuff (11) surrounds at least a portion of the bladder (10), providing an outer limiting extent to the movement of the bladder (10).

Description

technical field [0001] The invention relates to a blood circulation assisting device, in particular to a blood circulation assisting device capable of forming counterpulsation. Background technique [0002] Cardiac assist devices help relieve the load on the heart and increase the output of the heart. One type of heart assist device is capable of creating a counterpulsation. A variety of counterpulsation methods are available to treat acute and advanced heart failure. The dual effect of counterpulsation increases body organ (myocardium) fullness and afterload deformation of the left ventricle during diastole. To effectively create a counterpulsation, it is necessary to divert as much blood as possible from the systemic artery (aorta) at the onset of diastole and reverse this process before the subsequent systole. [0003] Typically such devices include intra-aortic balloon (IAB) pumps, extra ventricular assist devices, and Latissimus dorsi myoplasty. These devices are st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M1/10F04B43/08F04B43/00
CPCA61M1/107A61M2001/1063A61M1/1067A61M2001/1058A61M2205/0283A61M60/432A61M60/274A61M60/152A61M60/486A61M60/161A61M60/289A61M60/839A61M60/515A61M60/468
Inventor A·哈加尼G·T·安德鲁斯C·鲍尔斯N·G·史密斯
Owner 黑尔菲尔德心脏医疗设备有限公司