Lancing device and method of sample collection
First Claim
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1. A lancing device for use with a lancet to penetrate tissue and facilitate collection of a sample of a body fluid, said lancing device comprising:
- (a) a housing having front and back housing shells;
(b) a lancet carrier mounted with said housing for releasably carrying a lancet having a tissue penetrating portion;
(c) a transparent end cap removably and releasably attachable to the housing, the end cap comprising;
(i) an opening for allowing passage of the tissue penetrating portion of the lancet through the cap, the opening having a diameter less than a diameter of the lancet;
(ii) a forward-facing annular land surrounding the opening; and
(iii) a sample size indicator;
(d) a stroke control means comprising an indexing means for controlling the depth of penetration of the tissue penetrating portion of the lancet, the indexing means constructed to provide tactile feedback;
(e) a cocking actuator operably connected to the lancet carrier; and
(f) a trigger button operably connected to the lancet carrier and the cocking actuator, the trigger button positioned on the lancing device between the cocking actuator and the transparent end cap.
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Abstract
A lancing device and method for self-collecting a sample of body fluid by penetrating a body tissue at a sampling site. The invention includes a housing geometry configured for ease of use at different sampling sites on the body, even by persons having reduced dexterity and/or poor vision. Depth of penetration is selectively controlled by adjusting the stroke range of a spring-driven lancet carrier. A pressure applicator is included for stimulating flow of the body fluid. A transparent portion permits observation of the sampling site.
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Citations
15 Claims
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1. A lancing device for use with a lancet to penetrate tissue and facilitate collection of a sample of a body fluid, said lancing device comprising:
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(a) a housing having front and back housing shells;
(b) a lancet carrier mounted with said housing for releasably carrying a lancet having a tissue penetrating portion;
(c) a transparent end cap removably and releasably attachable to the housing, the end cap comprising;
(i) an opening for allowing passage of the tissue penetrating portion of the lancet through the cap, the opening having a diameter less than a diameter of the lancet;
(ii) a forward-facing annular land surrounding the opening; and
(iii) a sample size indicator;
(d) a stroke control means comprising an indexing means for controlling the depth of penetration of the tissue penetrating portion of the lancet, the indexing means constructed to provide tactile feedback;
(e) a cocking actuator operably connected to the lancet carrier; and
(f) a trigger button operably connected to the lancet carrier and the cocking actuator, the trigger button positioned on the lancing device between the cocking actuator and the transparent end cap. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
(a) a forward panel, the forward panel having the opening therethrough.
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10. The lancing device according to claim 1, wherein the transparent end cap comprises clear plastic.
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11. A method of collecting a body fluid sample, the method comprising:
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(a) positioning a lancing device on a desired sample site, the lancing device comprising;
(i) a housing having front and back housing shells;
(ii) a lancet carrier mounted with the housing and carrying a lancet having a tissue penetrating portion;
(iii) a transparent end cap removably and releasably attached to the housing, the end cap comprising;
(A) an opening for allowing passage of the tissue penetrating portion therethrough, the opening having a diameter less than a diameter of the lancet;
(B) a forward-facing annular land surrounding the opening; and
(C) a sample size indicator;
(iv) a stroke control means comprising an indexing means for controlling the depth of penetration of the tissue penetrating portion, the indexing means constructed to provide tactile feedback;
(v) a cocking actuator operably connected to the lancet carrier;
(vi) a trigger button operably connected to the lancet carrier and to the cocking actuator, the trigger button positioned on the lancing device between the cocking actuator and the transparent end cap;
(b) actuating the cocking actuator;
(c) pressing the forward-facing annular land against the sample site;
(d) pressing the trigger button to release the lancet so that the tissue penetrating portion penetrates the sample site; and
(e) monitoring the sample site through the transparent end cap; and
(f) comparing the body fluid sample with the sample size indicator. - View Dependent Claims (12, 13, 14, 15)
(a) applying compressive pressure to the sample site.
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13. The method according to claim 12, wherein the step of applying compressive pressure to the sample site comprises:
(a) applying steady compressive pressure to the sample site.
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14. The method according to claim 12, wherein the step of applying compressive pressure to the sample site comprises:
(a) applying varying compressive pressure to the sample site.
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15. The method according to claim 12, wherein the method further comprises:
(a) removing the lancing device from the sample site when the body fluid sample is a size indicated by the sample size indicator.
Specification