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Blood withdrawal cannula of a pump replacing or assisting activity of the heart

A heart function and trocar technology, which is applied in the field of blood collection trocars, and can solve the problem of lack of a device suitable for monitoring cardiac support for a long time.

Active Publication Date: 2014-06-11
REINHEART
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore there is no device for cardiac support suitable for long-term monitoring

Method used

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  • Blood withdrawal cannula of a pump replacing or assisting activity of the heart
  • Blood withdrawal cannula of a pump replacing or assisting activity of the heart
  • Blood withdrawal cannula of a pump replacing or assisting activity of the heart

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] figure 1 Shown symbolically is the lower apical region of the heart with the blood collection cannula 4 inserted into the left ventricle 1 . Blood is withdrawn from the left ventricle 1 of the heart by means of a blood collection cannula 4 with a pump 2 , for example a continuously operating centrifugal pump, and conveyed into the aorta, so that the pressure in the aorta increases. The pressure side of the pump 2 and the connection to the aorta are not shown here.

[0033] The heart pumps blood across the aortic valve against the pressure by the heart's own ventricle contraction until such a pressure is generated in the aorta by the pump that the heart can no longer pump blood against this pressure. From this pressure the burden on the heart is relieved and the function of pumping blood is taken over by the pump.

[0034] Both the pressure sensor 7 b and the volume sensor 3 b are arranged on the blood collection cannula 4 . The volume sensor 3 b here is formed by a p...

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Abstract

The invention relates to a blood withdrawal cannula (4) for connecting a pump (2) assisting or replacing activity of the heart to the inner volume of a heart ventricle (1), in particular the left ventricle. At the end thereof that is located in the ventricle the cannula has a pressure sensor (7a, 7b) for measuring the ventricle pressure and / or ventricle pressure differences and at the same end of the cannula has a volume sensor (3a, 3b, 5, 6) for measuring the volume and / or volume changes of the ventricle (1) in at least a partial region of the ventricle. The invention further relates to a measuring device for monitoring the ventricle contractions and / or the function of a pump replacing or assisting activity of the heart. The measuring device can be / is connected to the pressure sensor (7a, 7b) and to the volume sensor of a blood withdrawal cannula according to any one of the preceding claims and is designed to detect pressure changes and volume changes of a ventricle (1) as the heart is beating.

Description

technical field [0001] The invention relates to a blood collection cannula for connecting a cardiac function supporting or compensating pump to the inner volume of the ventricle, in particular the inner volume of the left ventricle, the blood collection cannula being located in the ventricle There are pressure transducers on the tip of the trocar for measuring ventricular pressure and / or ventricular pressure differential. [0002] Furthermore, the invention relates to a measuring device for monitoring the contraction of the ventricles and / or the function of a pump which compensates or supports the function of the heart, and also relates to a device for measuring the volume flow and / or the function of a pump which compensates or supports the function of the heart Or the method of setting the delivery pressure, the pump delivers blood from the ventricle of the heart and into the aorta of the heart by means of a blood collection trocar. Background technique [0003] For exampl...

Claims

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Application Information

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IPC IPC(8): A61B5/0215A61B5/053A61B5/02A61M1/10A61M1/12
CPCA61M1/1086A61M1/1008A61B5/0538A61M1/122A61B5/6848A61B5/7235A61M2205/3379A61B5/029A61B5/4836A61B5/02028A61M2205/3344A61B5/0215A61B5/027A61B5/6869A61M2205/3334A61M60/857A61M60/148A61M60/554A61M60/216A61M60/178A61M60/531
Inventor M·海因G·尼古拉斯R·格雷费U·施坦塞弗
Owner REINHEART
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