Appliance for cannulation of a blood vessel

a technology for cannulas and blood vessels, applied in the direction of blood sampling devices, balloon catheters, dilators, etc., can solve the problems of irritating the vessels, affecting the blood supply to the distal areas of the leg with the arterial cannula, and severe contraction of the arteries in particular

Inactive Publication Date: 2004-10-28
NOVALUNG
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, as a result of the overall trauma triggered, for example, by high doses of medication, blood transfusions, septic reactions, etc., there may be severe contractions of the arteries in particular.
In this way, all of the blood guided in the artery flows into the cannula and, via the cannula, into the femoral vein of the other leg, which means that blood supply to the distal areas of the leg with the arterial cannula is no longer guaranteed.
However, these techniques have the disadvantages that the insertion of the two further cannulas additionally damages and thus irritates the vessels.
Moreover, the method is made very complicated by the use of four cannulas.
However, in extracorporeal lung assist, for example, such balloon catheters are not suitable because they co

Method used

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  • Appliance for cannulation of a blood vessel
  • Appliance for cannulation of a blood vessel
  • Appliance for cannulation of a blood vessel

Examples

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Embodiment Construction

[0092] In FIG. 1, reference number 10 designates a patient whose femoral artery is designated by 11 and whose femoral vein is designated by 12. Blood is removed from the femoral artery 11 via a cannula 14. A tube 15 leads from the cannula 14 to a lung assist device 16, and a further tube 17 leads from the lung assist device 16 to a further cannula 18 in the femoral vein 12.

[0093] FIG. 1 shows the system of extracorporeal lung assist using a femoral connection technique. Alternatively, a connection is also possible, for example, to the jugular vein via the femoral artery 11. The cannula 14 is chosen with a diameter optimally adapted to the femoral artery 11 of the patient 10 and is introduced into the femoral artery 11 as critical vessel. The patient's mean arterial pressure ensures that the blood is conveyed from the femoral artery 11 via the tube 15 to the lung assist device 16. A suitable lung assist device in the form of a membrane oxygenator is obtainable, for example, from the ...

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Abstract

The present invention relates to an appliance for cannulation of a blood vessel with a cannula which, after introduction into the vessel, is in fluidic communication with the vessel. At least one means is also provided to permit a controlled division of the blood into a first subsidiary stream which leaves the vessel through the cannula, and a second subsidiary stream which continues to flow through the vessel.

Description

[0001] 1. Field of the Invention[0002] The present invention relates to an appliance for cannulation of a blood vessel with a cannula which, after introduction into the vessel, is in fluidic communication with the vessel, and also to the use of the appliance and to a method for cannulation of blood vessels.[0003] 2. Related Prior Art[0004] Such appliances are already known in the medical field and are used in many different medical indications.[0005] For example, they are used in extracorporeal blood circuits, for example for extracorporeal lung assist. This is necessary when a patient's pulmonary function is impaired and the body's oxygen supply is at risk. In this connection, apparatuses have now been used for some time which, like a heart-lung machine in open-heart surgery, can temporarily take over the function of the diseased lung.[0006] In temporary extracorporeal lung assist (ECLA), extracorporeal membrane oxygenation (ECMO) has for many years been an established treatment pr...

Claims

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Application Information

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IPC IPC(8): A61B5/15A61M1/16A61M1/36A61M25/00A61M29/02
CPCA61M1/3653A61M1/3666A61M2025/1095A61M1/3659
Inventor MATHEIS, GEORGFRERICHS, HEIKOSANDMANN, AXELKLIETSCH, DIETMAR
Owner NOVALUNG
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