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, wherein the distal surface of the needle bearing portion extends through 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;
(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, the lancing device further comprising a depth adjustment mechanism.
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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.
4 Citations
15 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, wherein the distal surface of the needle bearing portion extends through 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; (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, the lancing device further comprising a depth adjustment mechanism. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for puncturing skin of a subject with a lancet, said skin comprising an epidermis and a dermis having a papillary layer and a reticular layer, comprising:
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(a) providing a lancing system comprising; (i) a lancet comprising; 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, wherein the distal surface of the needle bearing portion extends through 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; a handle portion attached to the proximal end of the needle bearing portion; and 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 (ii) 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, the lancing device further comprising a depth adjustment mechanism. (b) puncturing the subject'"'"'s skin with the lancet such that the distal surface of the needle bearing portion of the lancet presses against the skin and the needle is fully embedded in the skin; and withdrawing the needle from the skin; thereby consistently and painlessly cutting blood vessels in the papillary layer and producing a predictable depth of penetration.
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Specification