Simple blood-collecting device
First Claim
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1. A blood-collecting device comprising:
- a decompression chamber;
a suction cell separate from said decompression chamber, with paracentric means;
said suction cell contacting a skin surface to form a closed space, and communicating with said decompression chamber to cause decompression of said suction cell;
said paracentric means extending within said suction cell initially spaced from said skin surface;
said paracentric means subsequently contacting and penetrating said skin surface; and
paracentesis-terminating means for withdrawal of said paracentric means from said skin surface.
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Abstract
A blood-collecting device comprising a decompression chamber, a suction cell with paracentetic means, and paracentesis-terminating means. Simple and painless blood collection is made possible.
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Citations
21 Claims
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1. A blood-collecting device comprising:
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a decompression chamber; a suction cell separate from said decompression chamber, with paracentric means; said suction cell contacting a skin surface to form a closed space, and communicating with said decompression chamber to cause decompression of said suction cell; said paracentric means extending within said suction cell initially spaced from said skin surface; said paracentric means subsequently contacting and penetrating said skin surface; and paracentesis-terminating means for withdrawal of said paracentric means from said skin surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A blood collecting device comprising:
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a sealed decompression chamber; a suction cell separate from said decompression chamber and adapted for mating with said decompression chamber; and a skin perforator extending within said suction cell to pierce a skin surface. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of blood collection comprising:
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adhering a suction cell to a skin surface in an airtight manner; mating said suction cell with a decompression cell; piercing a membrane of said decompression chamber with a hollow needle of said suction cell to form a positive vacuum in said suction cell upon partial mating of said suction cell with said decompression chamber; driving a skin perforator extending into said suction cell with a pressing rod of said decompression chamber upon partial mating of said suction cell with said decompression chamber; swelling said skin surface to contact said skin perforator; and piercing said skin surface with said skin perforator upon full mating of said suction cell with said decompression chamber.
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Specification