Centesis instrument
First Claim
1. A puncture instrument comprising:
- a first tube;
a second tube mounted in said first tube;
a drive mechanism displaceably mounted in said second tube;
a puncture needle unit disposed on a distal end of said drive mechanism and having a puncture needle;
an abutting member for being pushed against a living body surface, said abutting member being disposed on a distal end of said second tube; and
a puncture controller for allowing said puncture needle to puncture said living body surface when a pushing force applied to said living body surface by said abutting member reaches a predetermined value or more;
wherein the puncture controller includes a push button disposed on the first tube for actuating a puncturing action only when the pushing force reaches the predetermined value or more.
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0 Petitions
Accused Products
Abstract
A centesis instrument, wherein a patient applies a contact part to a palm, a finger, or an arm in the state of gripping an outer tube by hand and presses the outer tube against its measured portion. A third coiled spring is compressed to increase spring power. When the outer tube reaches a prescribed position, the tip face of the vertical portion of a centesis button reaches a hole part, and a projected part is allowed to be pressed. When the patient presses a button body from a direction perpendicular to the axis of the button body by using a finger at that position, a locking piece is separated from a locking part and the centesis needle of a centesis needle unit is instantaneously projected from the opening part of the contact part to the measured portion by the spring power of the third coiled spring for centesis. Thus, a prescribed amount of blood can be taken out from the measured portion.
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Citations
14 Claims
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1. A puncture instrument comprising:
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a first tube; a second tube mounted in said first tube; a drive mechanism displaceably mounted in said second tube; a puncture needle unit disposed on a distal end of said drive mechanism and having a puncture needle; an abutting member for being pushed against a living body surface, said abutting member being disposed on a distal end of said second tube; and a puncture controller for allowing said puncture needle to puncture said living body surface when a pushing force applied to said living body surface by said abutting member reaches a predetermined value or more; wherein the puncture controller includes a push button disposed on the first tube for actuating a puncturing action only when the pushing force reaches the predetermined value or more. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification