Cardiocirculatory aiding device

Abstract

Cardiocirculatory aiding device, as hematic pumping device able to aid the right or left ventricular or biventricular of the human body, characterised by being supplied by gas pneumatic energy, in which: i) the variation of pressure generator device systems is intended for being placed outside of the human body; ii) the pumping device of the blood (P), is conceived to be installed inside of the human body; iii) the two said devices (i,ii) are connected with at least one tubular duct of transmission of said gas, passing from the inside of the human body to the external of the same; iv) said pumping device of the blood (P) being driven by the variation of pneumatic pressure in said duct by means of two opposite expansible and retractable lungs that compress a central chamber body elastically yielding by pulses in order to cause, by means of two ducts respectively of blood entry and blood exit with unidirectional valves, the pumping of the blood.

Description

[0001] This application claims priority of Italian Patent Application No. UD2005A000112 filed on Jul. 1, 2005. FIELD OF THE INVENTION [0002] This invention relates to a cardiocirculatory aiding device, namely, to a hematic pump to be associated to the heart, whose characteristics are in accordance with the precharacterizing part of the main claim. [0003] The use is substantially directed to assist the heart, but also to replace it in extremis with two of these elements (Right and Left). BACKGROUND OF INVENTION [0004] As known in the cardiosurgery practice, some mechanical aiding devices of the heart are used, commonly defined Ventricular Assist Device (V.A.D.) or Total Artificial Heart (T.A.H.). [0005] We refer substantially to devices able to mechanically pump the blood, producing pulse or continuous hematic flows. [0006] Such devices are used to solve reversible acute cardiac insufficiency clinical cases (e.g.: infarct, myocarditis, morphological pathologies, postcardiotomy, etc ....

AI Technical Summary

Benefits of technology

[0027] In this way, there is the advantage to extremely simplify the apparatus giving the maximum performance guarantee to the user.

[0028] Moreover, thanks to the installations of the motor and electric or electronic components, set outside, everything will be easily accessible for maintenance and change and will be also easily adjustable.

[0029] A further interesting advantage derives from the fact that the propeller means is a gas (e.g. oxygen or air).

[0030] Furthermore, if the pumping external mechanism would clog or stop, a manual pumping means is provided. In fact, a simple small pump con...

Problems solved by technology

In the majority of the cases the existing devices have some difficulties of housing inside the chest, due to dimension and weight problems, as well as in the application modalities.

Other noticeable drawbacks are due to their internal geometries and to their pumping modalities that can cause, in respect of the blood, hemolysis or formation of coagulations.

Another negative aspect is caused by the weight and the encumbrance of the operating unit, associated to the pumping device that limits or precludes the portability of the whole complex.

An additional problem created by the current devices is that they include complex internal mechanisms and, given the complexity, they are not completely reliable.

In fact it is known that the more an apparatus is complex, the more probabilities of jamming danger there are.

Furthermore the well-known devices incorporate electric and / or electromagnetic apparatus, with all the consequences and the dangers thereof.

Finally it is known that such apparatus need more separate groups that must be housed in different positions of the body with further complications and important encumbrances and infection danger.

Furthermore in case of jamming or stopping of the device, there is poor immediate possibility of intervention from outside, endangering the user's life.

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