PUNCTURE METHOD, INCISION NEEDLE, PUNCTURE NEEDLE, NEEDLE CAP AND INSTRUMENT FOR BLOOD PURIFICATION TREATMENT
First Claim
1. A method of puncturing a shunt blood vessel, comprising a step of puncturing a shunt blood vessel with a tubular or cylindrical incision needle and thereby forming an incision on a surface of the shunt blood vessel, whereinthe incision needle has an angled end face at the tip of the needle, and the tip of the angled end face has a pointed extremity that protrudes apically from a hypothetical angled plane formed by cutting straight through the tip of the needle at an angle, andthe step of forming the incision comprises:
- a step of arranging the incision needle so that the angled end face faces the skin;
a step of puncturing the skin with the pointed extremity of the incision needle and inserting the needle toward the shunt blood vessel to thereby form a puncture route; and
a step of inserting the pointed extremity of the incision needle into the shunt blood vessel to thereby form a reverse U-shaped incision that opens towards the front side, with the apex of the incision being on the far side in the direction of insertion.
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Accused Products
Abstract
The present invention is a method of puncturing a shunt blood vessel, using a incision needle having a pointed extremity that protrudes apically from a hypothetical angled plane formed by cutting straight through the tip of the needle at an angle, wherein the pointed extremity of the incision needle is inserted into a shunt blood vessel, thereby forming a reverse U-shaped incision on the surface of the shunt blood vessel, with the apex of the incision being on the bottom side in the direction of insertion.
16 Citations
39 Claims
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1. A method of puncturing a shunt blood vessel, comprising a step of puncturing a shunt blood vessel with a tubular or cylindrical incision needle and thereby forming an incision on a surface of the shunt blood vessel, wherein
the incision needle has an angled end face at the tip of the needle, and the tip of the angled end face has a pointed extremity that protrudes apically from a hypothetical angled plane formed by cutting straight through the tip of the needle at an angle, and the step of forming the incision comprises: -
a step of arranging the incision needle so that the angled end face faces the skin; a step of puncturing the skin with the pointed extremity of the incision needle and inserting the needle toward the shunt blood vessel to thereby form a puncture route; and a step of inserting the pointed extremity of the incision needle into the shunt blood vessel to thereby form a reverse U-shaped incision that opens towards the front side, with the apex of the incision being on the far side in the direction of insertion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method of puncturing a shunt blood vessel with a puncture needle through a puncture hole formed by incision in the surface of a shunt blood vessel, wherein
the puncture needle is a needle having a tubular part with an angled end face angled with respect to the needle axis and a protruding part that protrudes forwards linearly from the tip of the angled end face of the tubular part, with the tip of the protruding part being narrower than the tubular part and being curved convexly in the front, and the method of puncturing comprises a step of inserting the puncture needle in the shunt blood vessel through the puncture hole formed by incision starting with the protruding part.
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32. A method of puncturing a shunt blood vessel, comprising a step of removing a scab formed at an entrance to a puncture route on a skin surface with a needle cap to be mounted on a puncture needle, and a step of puncturing the shunt blood vessel with the puncture needle after removal of the scab, wherein
the needle cap is a needle cap having a hollow holding part for holding the needle and a scab removal part on the tip of the holding part, with the scab removal part being formed from a circular arc-shaped outer surface curving around the needle insertion axis and an inner surface located inside the outer surface, and the needle cap further having a sharp top edge with a width in the direction of the needle insertion axis formed by the outer surface and inner surface, and the scab is removed with the scab removal part of the needle cap.
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33. A tubular or cylindrical incision needle for puncturing a shunt blood vessel and forming an incision on the surface of a shunt blood vessel, comprising an angled end face at the tip of the needle, wherein
the tip of the angled end face has a pointed extremity protruding apically from a hypothetical angled plane formed by cutting straight through the tip of the needle at an angle, and the pointed extremity is curved towards the central axis of the needle, cutting faces are formed on at least a part of the angled end face that includes the pointed extremity, reverse cutting faces are formed on at least a part of the reverse surface of the angled end face that includes the pointed extremity, and the foremost edge of the pointed extremity is formed by the cutting faces arranged symmetrically with the foremost edge therebetween, while the reverse cutting face is disposed not at the foremost edge, but arranged symmetrically with the center of the pointed extremity therebetween.
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35. A puncture needle for puncturing a shunt blood vessel through a puncture hole formed by incision in the surface of a shunt blood vessel, comprising:
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a tubular part having an angled end face angled relative to the needle axis; and a protruding part that protrudes forwards from the tip of the angled end face of the tubular part, wherein the protruding part is narrower at the tip than the tubular part and has a convex curve at the front, and the radius of the protruding part is 200 μ
m or more. - View Dependent Claims (36)
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37. A needle cap for removing a scab at the entrance to a puncture route in a skin surface, comprising:
- a hollow holding part for holding a needle; and
a scab removal part at the tip of the holding part, whereinthe scab removal part is formed from a circular arc-shaped outer surface curving around the needle insertion axis and an inner surface located inside the outer surface, and has a sharp top edge that is formed from this outer surface and inner surface and has a width in the direction of the needle insertion axis, and the scab removal part is formed substantially in a crescent shape in cross-section, and the angle formed by the arc of the outer surface and the arc of the inner surface at the top edge in this crescent cross-section is 5°
to 89°
. - View Dependent Claims (38, 39)
- a hollow holding part for holding a needle; and
Specification