Ventricular assist device cannula and ventricular assist device including the same

1. A ventricular assist device including a blood pump pumping blood, comprising:

a first conduit including a first connecting tube connecting an incision of a first body tissue and the blood pump so that the blood can flow, and a first electrode connected to an end portion of the first connecting tube and contacting the incision of the first body tissue to transfer an electric signal to the first body tissue;

a second conduit including a second connecting tube connecting an incision of a second body tissue and the blood pump so that the blood can flow, and a second electrode connected to an end portion of the second connecting tube and contacting the incision of the second body tissue to transfer another electric signal to the second body tissue, the second electrode being spaced apart from the first electrode;

an impedance measuring device measuring impedance between the first electrode and the second electrode;

a control device receiving a signal from the impedance measuring device to control operation of the blood pump.

2. The ventricular assist device including an impedance measuring device of claim 1 , wherein:

the second electrode is

an electrode patch attached to the skin.

3. The ventricular assist device including an impedance measuring device of claim 1 , wherein:

the second electrode is

an implantable electrode installed in the body.

4. The ventricular assist device including an impedance measuring device of claim 1 , wherein:

the first electrode is

a conductive sheet attached to the surface of the connecting tube.

5. The ventricular assist device including an impedance measuring device of claim 1 , wherein:

the first electrode is

a hollow electrode having a hollow space where the connecting tube is inserted at the inside thereof and contacted to the incision of the first body tissue at the outside thereof.

6. The ventricular assist device including an impedance measuring device of claim 5 , wherein:

a receiving groove receiving the incision of the first body tissue is formed at an outer circumference of the hollow electrode.

7. The ventricular assist device including an impedance measuring device of claim 1 , wherein:

the first electrode is

a connector electrode which has a hollow space where the blood can flow at the inside thereof and includes a body part contacted to the incision of the first body tissue and inserted into the first body tissue and a fixing part extending from the body part and inserted and fixed to the connecting tube at the outside thereof.

8. The ventricular assist device including an impedance measuring device of claim 7 , wherein:

a receiving groove receiving the incision of the first body tissue is formed at an outer circumference of the body part.

9. The ventricular assist device including an impedance measuring device of claim 1 , wherein:

the first electrode

has hollow space where the blood can flow at the inside thereof and includes a body part contacted to the incision of the first body tissue and fixing parts extending from the body part to the upstream and the downstream, respectively, at the outside thereof, and

the connecting tube includes

a first connecting tube having one end connected to the fixing part and the other end inserted into the first body tissue and a second connecting tube having one end connected to the fixing part and the other end connected to the ventricular assist device.

10. The ventricular assist device including an impedance measuring device of claim 9 , wherein:

a receiving groove receiving the incision of the first body tissue is formed at an outer circumference of the body part.