CN103861162B - 一种受力自平衡式的人工心脏泵外壳 - Google Patents

一种受力自平衡式的人工心脏泵外壳 Download PDF

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Publication number
CN103861162B
CN103861162B CN201410122775.6A CN201410122775A CN103861162B CN 103861162 B CN103861162 B CN 103861162B CN 201410122775 A CN201410122775 A CN 201410122775A CN 103861162 B CN103861162 B CN 103861162B
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band
artificial heart
axial dimension
pump case
heart pump
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CN103861162A (zh
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常宇
陈佳
高斌
曾毅
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Beijing University of Technology
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Beijing University of Technology
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/10—Location thereof with respect to the patient's body
    • A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
    • A61M60/126—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel
    • A61M60/135—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel inside a blood vessel, e.g. using grafting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/10—Location thereof with respect to the patient's body
    • A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
    • A61M60/126—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel
    • A61M60/148—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Cardiology (AREA)
  • Biomedical Technology (AREA)
  • Mechanical Engineering (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Transplantation (AREA)
  • External Artificial Organs (AREA)
  • Prostheses (AREA)

Abstract

一种受力自平衡式的人工心脏泵外壳，属于人工心脏领域，特别涉及人工心脏泵植入主动脉血管的固定装置。该外壳为由血液相容性好的材料制成的圆筒，可放置在主动脉内，所述圆筒的内壁设置有四条以上的凸起的螺旋条带，各条带平行，螺旋倾角为30°至60°，该条带展开后的形状为，一侧边为直线另一侧边为弧线，在条带两端呈尖形，各条带朝向一致，且相邻条带的间隔大于条带最宽处两倍以上。拥有此结构的人工心脏泵外壳具有抵消叶轮旋转造成的轴向和扭转的作用力的作用，实现了人工心脏外壳的受力自平衡，从而减小对血管内壁造成损伤。

Description

一种受力自平衡式的人工心脏泵外壳
技术领域
本发明属于人工心脏领域，特别涉及人工心脏泵植入主动脉血管的固定装置。
背景技术
为了降低传统心室辅助装置对心脏的损伤，专利1（介入式动脉内微型心室辅助循环装置.申请号：99126258.1）提出了的植入式人工心脏位于主动脉内部。为了提高其血液相容性，减小体内异物体积，专利2（MortezaGharib,SanMarinoetal.IntravascularMiniatureStentPump.2003.申请号：CA92130-2081(US)）提出采用传统的血管支架替代植入式人工心脏的金属外壳（Housing）。上述发明虽然改善了植入式人工心脏的血液相容性，但是依然存在两个严重的缺陷：第一，在叶轮转动的时候，人工心脏的外壳会受到与叶轮转动方向相同的转矩作用；第二，在人工心脏将血液从泵入主动脉的同时其也受到血液的反作用力影响。而上述两种作用力会直接作用在血管壁上，进而造成血管壁的损伤。
发明内容
为了减小人工心脏外壳对血管造成的损伤，本发明提供了一种受力自平衡式的人工心脏泵外壳，用来减弱或抵消人工心脏运行过程中上述两种作用力对血管壁的影响。
一种受力自平衡式的人工心脏泵外壳，为由血液相容性好的材料制成的圆筒，可放置在主动脉内，所述圆筒的内壁设置有四条以上的凸起的螺旋条带，各条带平行，螺旋倾角为30°至60°，该条带展开后的形状为，一侧边为直线另一侧边为弧线，在条带两端呈尖形，各条带朝向一致，且相邻条带的间隔大于条带最宽处两倍以上。
作为优选，所述螺旋倾角为45°；所述条带高度为0.2-1毫米，最宽处为0.5毫米；所述相邻条带的间隔为1毫米以上。
受力自平衡式的人工心脏外壳工作原理是：当血液沿着条带所形成的流道流动时，流道两侧的血液流速不同。根据流体力学的基本原理，直边处的流速小，弧边处的流速大，这种速度差会在条带两侧产生压力差，利用这种压力差所形成的轴向作用力抵消了由于人工心脏工作时对血管产生的向后作用力；同时，由于条带形成螺旋的血道，血液的流动会给人工心脏外壳产生一个扭矩，该扭矩的方向与人工心脏工作时产生的扭矩是相反的，这样就抵消了工心脏外壳对血管壁的扭转。这样，实现了人工心脏外壳的受力自平衡，从而减小对血管内壁造成的损伤。所以，本发明与专利1的全实体外壳、专利2的网状支架结构相比，能够抵消一部分血管壁的后坐力与扭转力，进而降低对血管内壁造成的损伤。
附图说明
图1是本发明一种受力自平衡式的人工心脏泵外壳的优选实施例的结构示意图。
图2为图1所示一种受力自平衡式的人工心脏泵外壳的展开图。
图中：1、条带。
具体实施方式
下面结合附图对本发明做进一步说明。
在一块成长为20mm,宽度为10mm的血液相容性好的金属材料板（如钛合金TC4）上，斜向平行设置多条凸起的条带1（如图1），条带1高0.8毫米，斜向的角度为45°，每条条带的一侧边为直线，另一侧边为弧线，条带的最宽处为0.5毫米，相邻条带的间隔为1毫米以上。将金属材料板卷成圆筒，凸起的条带在圆筒内侧，即形成了自平衡式的人工心脏泵外壳（如图2）。
安装时需使条带的直边朝向血流来的方向。
通过试验证明，本发明可以消除部分沿轴向方向和扭转的作用力，从而达到减小对血管内壁损伤的效果。

Claims (2)

1.一种受力自平衡式的人工心脏泵外壳，为由血液相容性好的材料制成的圆筒，可放置在主动脉内，其特征在于：所述圆筒的内壁设置有四条以上的凸起的螺旋条带，各条带平行，螺旋倾角为30°至60°，该条带展开后的形状为，一侧边为直线另一侧边为弧线，在条带两端呈尖形，各条带朝向一致，且相邻条带的间隔为条带最宽处两倍以上。
2.如权利要求1所述的一种受力自平衡式的人工心脏泵外壳，其特征在于：所述螺旋倾角为45°；所述条带高度为0.2-1毫米，最宽处为0.5毫米；所述相邻条带的间隔为1毫米以上。
CN201410122775.6A 2014-03-28 2014-03-28 一种受力自平衡式的人工心脏泵外壳 Expired - Fee Related CN103861162B (zh)

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DE102018201030A1 (de) 2018-01-24 2019-07-25 Kardion Gmbh Magnetkuppelelement mit magnetischer Lagerungsfunktion
DE102018211327A1 (de) 2018-07-10 2020-01-16 Kardion Gmbh Laufrad für ein implantierbares, vaskuläres Unterstützungssystem
DE102020102474A1 (de) 2020-01-31 2021-08-05 Kardion Gmbh Pumpe zum Fördern eines Fluids und Verfahren zum Herstellen einer Pumpe

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US7544160B2 (en) * 2005-02-10 2009-06-09 Yossi Gross Extracardiac blood flow amplification device
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