Lancet system
First Claim
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1. A lancing system, comprising:
- (a) a lancet comprising;
(i) a needle bearing portion having a proximal end and a distal end, the proximal end comprising a proximal surface having a first diameter, the distal end comprising a distal surface having a second diameter, the second diameter being smaller than the first diameter;
(ii) a handle portion attached to the proximal end of the needle bearing portion; and
(iii) a needle having an exterior portion extending from the distal surface of the needle bearing portion, the exterior portion of the needle having a needle proximal end, a needle distal end, and a longitudinal extent between the needle proximal end and the needle distal end, wherein the needle proximal end is in contact with the distal surface of the needle bearing portion; and
(b) a lancing device capable of retaining the lancet and, when actuated, urging it forward to puncture a skin surface of a user, the lancing device having an exit opening,wherein the distal surface of the needle bearing portion protrudes out of the exit opening of the lancing device and contacts the skin surface of the skin of the user when the longitudinal extent of the needle is fully embedded in the skin surface of the user, thereby producing a predictable depth of penetration of the user'"'"'s skin,wherein the distal surface of the needle bearing portion has an area of up to 12 square millimeters and the longitudinal extent of the exterior portion of the needle is less than about 1.0 millimeter, andwherein protrusion of the needle and the distal surface of the needle bearing portion from the exit opening is limited by contact between an outer surface of the needle bearing portion and an interior surface of the lancing device.
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Abstract
A lancing system comprising a lancet with a handle portion and a needle bearing portion, the needle bearing portion retaining a thin needle protected by a safety cap. The safety cap includes first and second chambers, where the first chamber acts as a sheath and the second chamber having a surface positioned to compromise the structure of the needle when the needle bearing portion of the lancet body is inserted into the second chamber.
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Citations
14 Claims
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1. A lancing system, comprising:
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(a) a lancet comprising; (i) a needle bearing portion having a proximal end and a distal end, the proximal end comprising a proximal surface having a first diameter, the distal end comprising a distal surface having a second diameter, the second diameter being smaller than the first diameter; (ii) a handle portion attached to the proximal end of the needle bearing portion; and (iii) a needle having an exterior portion extending from the distal surface of the needle bearing portion, the exterior portion of the needle having a needle proximal end, a needle distal end, and a longitudinal extent between the needle proximal end and the needle distal end, wherein the needle proximal end is in contact with the distal surface of the needle bearing portion; and (b) a lancing device capable of retaining the lancet and, when actuated, urging it forward to puncture a skin surface of a user, the lancing device having an exit opening, wherein the distal surface of the needle bearing portion protrudes out of the exit opening of the lancing device and contacts the skin surface of the skin of the user when the longitudinal extent of the needle is fully embedded in the skin surface of the user, thereby producing a predictable depth of penetration of the user'"'"'s skin, wherein the distal surface of the needle bearing portion has an area of up to 12 square millimeters and the longitudinal extent of the exterior portion of the needle is less than about 1.0 millimeter, and wherein protrusion of the needle and the distal surface of the needle bearing portion from the exit opening is limited by contact between an outer surface of the needle bearing portion and an interior surface of the lancing device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A lancing system comprising:
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a lancing device comprising a housing which encloses a spring mechanism and a trigger, said housing comprising a lancing device wall having an outer distal surface and an interior surface and having an exit opening that perforates the lancing device wall; and a lancet mounted in said housing, said lancet comprising a handle portion, a needle bearing portion, and a needle, the needle bearing portion comprising a needle bearing portion wall, an outer surface and a distal surface, said needle bearing portion being mounted on said handle portion, said distal surface having a surface area in the range of nine square millimeters to twelve square millimeters and being sized to pass through the exit opening, wherein the needle protrudes about 0.3 millimeter to about 1.0 millimeter from said distal surface; wherein said spring mechanism is operative to propel said distal surface of the needle bearing portion and of said needle through said exit opening upon actuation of said trigger, carrying said distal surface to a skin surface and said needle into the skin surface, thereby producing a predictable depth of penetration of the user'"'"'s skin, and wherein protrusion of the needle and the distal surface of the needle bearing portion from the exit opening is limited by contact between the outer surface of the needle bearing portion and the interior surface of the lancing device. - View Dependent Claims (12, 13)
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14. A lancing system comprising:
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(a) a lancet comprising; (i) a needle bearing portion having a proximal end and a distal end, the proximal end comprising a proximal surface having a first diameter, the distal end comprising a distal surface having a second diameter and having a surface area of up to twelve square millimeters, the second diameter being smaller than the first diameter; (ii) a handle portion attached to the proximal end of the needle bearing portion; and (iii) a needle having an exterior portion extending from the distal surface of the needle bearing portion, the exterior portion of the needle having a needle proximal end, a needle distal end, and a longitudinal extent between the needle proximal end and the needle distal end, wherein the needle proximal end is in contact with the distal surface of the needle bearing portion; and (b) a lancing device comprising a housing having an exit opening, said lancing device being operative to retain the lancet in the housing, urge it forward to puncture a skin surface when actuated by a user and then retract it back into the housing, wherein the distal surface of the needle bearing portion passes through the exit opening of the lancing device and contacts the skin surface of the user, thereby producing a predictable depth of penetration of the user, wherein the longitudinal extent of the exterior portion of the needle is less than about 1.0 millimeter and said exterior portion has a diameter that is less than 0.234 millimeters, and wherein protrusion of the needle and the distal surface of the needle bearing portion from the exit opening is limited by contact between an outer surface of the needle bearing portion and an interior surface of the lancing device.
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Specification