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Medical heart pump impeller

A heart pump and impeller technology, applied in metal material coating technology, suction equipment, etc., can solve the problem of poor hemolysis performance, and achieve the effect of improving blood compatibility, simple components, and high strength

Inactive Publication Date: 2015-08-26
孙胜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using a mechanical pump to transport blood requires the pump to be biocompatible, and the hemolytic performance in the prior art is not very good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A medical heart pump impeller, which includes a cast titanium alloy impeller body and a titanium nitride ceramic material layer outside the impeller body,

[0030] It is characterized in that the chemical composition of the cast titanium alloy impeller body is Zn: 8%, Al: 5%, Si: 3%, Cu: 2%, Fe: 0.6%, Mg: 0.5%, Ag: 0.5%, Cr: 0.1 ﹪, Zr: 0.05﹪, La: 0.03﹪, Ta: 0.03﹪, B: 0.02﹪, the balance is Ti and unavoidable impurities;

[0031] The preparation method of the cast titanium alloy impeller body includes the following steps: preparing the alloy according to the above ratio, melting and pouring the alloy material: the melting temperature is 1810°C, and the pouring temperature is 1750°C; Heating, heating up to 850°C, heating rate 300°C / hour, keeping warm for 7 hours, then cooling down to 700°C, cooling rate 100°C / hour, keeping warm for 5 hours, then heating up to 800°C, heating rate 100°C / hour, keeping warm 5 hours, then lower the temperature to 450°C again, the cooling rate ...

Embodiment 2

[0037] A medical heart pump impeller, which includes a cast titanium alloy impeller body and a titanium nitride ceramic material layer outside the impeller body,

[0038] It is characterized in that the chemical composition of the cast titanium alloy impeller body is Zn: 9%, Al: 6%, Si: 4%, Cu: 3%, Fe: 0.7%, Mg: 0.6%, Ag: 0.7%, Cr: 0.2 ﹪, Zr: 0.08﹪, La: 0.04﹪, Ta: 0.04﹪, B: 0.03﹪, the balance is Ti and unavoidable impurities;

[0039] The preparation method of the cast titanium alloy impeller body: includes the following steps: preparing the alloy according to the above ratio, melting and pouring the alloy material: melting temperature: 1820°C, pouring temperature: 1760°C; Heating, heating up to 850°C, heating rate 300°C / hour, heat preservation for 7 hours, then cooling to 700°C, cooling rate 100°C / hour, heat preservation for 5 hours, then heating up to 800°C, heating rate 100°C / hour, heat preservation 5 hours, then lower the temperature to 450°C again, the cooling rate is 50...

Embodiment 3

[0045] A medical heart pump impeller, which includes a cast titanium alloy impeller body and a titanium nitride ceramic material layer outside the impeller body,

[0046] It is characterized in that the chemical composition of the cast titanium alloy impeller body is Zn: 8.5%, Al: 5.5%, Si: 3.5%, Cu: 2.5%, Fe: 0.65%, Mg: 0.55%, Ag: 0.6%, Cr: 0.15 ﹪, Zr: 0.06﹪, La: 0.035﹪, Ta: 0.035﹪, B: 0.025﹪, the balance is Ti and unavoidable impurities;

[0047] The preparation method of the cast titanium alloy impeller body includes the following steps: preparing the alloy according to the above ratio, melting and pouring the alloy material: the melting temperature is 1815°C, and the pouring temperature is 1755°C; Heating, heating up to 850°C, heating rate 300°C / hour, heat preservation for 7 hours, then cooling to 700°C, cooling rate 100°C / hour, heat preservation for 5 hours, then heating up to 800°C, heating rate 100°C / hour, heat preservation 5 hours, then lower the temperature to 450°C ...

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Abstract

The invention discloses a medical heart pump impeller. The medical heart pump impeller comprises a cast titanium alloy impeller body and an impeller body outer titanium nitride ceramic material layer, and uses a specific composition of acid washing liquid and passivation liquid; and through the use of the chemical agents, the surface treatment period is largely shortened, and the surface treatment effect is excellent. As the titanium nitride ceramic material is coated on the surface of the impeller according to the type and speed differences of human cells contacted by the impeller, the material and blood compatibility is improved.

Description

technical field [0001] The invention relates to a medical heart pump impeller and belongs to the technical field of medical instruments. Background technique [0002] Statistics from the World Health Organization show that heart failure and cardiogenic shock disease are increasingly threatening human health. Therefore, if an artificial heart assist device can be developed, it can make a great contribution to the cause of saving lives and healing the wounded, and must have extensive social benefits and market development prospects. The United States, Japan, Europe and other countries are all competing to develop rotary blood pumps. Using a mechanical pump to transport blood requires that the pump be biocompatible, and the hemolytic performance in the prior art is not very good. This requires us to manufacture impellers to meet the technical requirements for the use of blood pump devices for human medical devices. Contents of the invention [0003] The present invention a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/02C22F1/18C23G1/02C23C22/36A61M1/12C04B35/58
Inventor 孙胜
Owner 孙胜
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