Device and method for variable speed lancet
View Patent ↗A method of penetrating tissue is provided. The method comprises using a lancet driver to advance a lancet into the tissue; advancing the lancet at a first desired velocity in a first layer of tissue; advancing the lancet at a second desired velocity in a second layer of tissue; and advancing the lancet at a third desired velocity in a third layer of tissue. In one embodiment, the method may including using a processor having logic for controlling velocity of the lancet in each layer of tissue.
1. A method of penetrating tissue comprising:
using a lancet driver to advance a lancet into said tissue;
advancing said lancet at a first desired velocity in a first layer of tissue;
advancing said lancet at a second desired velocity in a second layer of tissue;
advancing said lancet at a third desired velocity in a third layer of tissue; and
creating a wound in the tissue; wherein at least two of the first, the second, the third velocity being different; and wherein the first, the second and the third layer are different tissue layer.
2. The method of claim 1 further comprising using a processor having logic for controlling velocity of the lancet in each layer of tissue.
3. The method of claim 2 wherein said lancet achieves a lancet velocity between about 4 to 10 m/s while in at least one of the layers of tissue.
4. The method of claim 2 wherein said lancet achieves a penetration depth, as measured from a surface of the tissue, of between about 0.5 to about 2.0 mm.
5. The method of claim 2 wherein said second desired velocity is sufficient to minimize nerve stimulation while maintaining cutting efficiency.
6. The method of claim 2 wherein said second velocity is the same as the first velocity.
7. The method of claim 2 wherein said first velocity is at least partially determined based on hydration of the stratum corneum.
8. The method of claim 2 wherein said second velocity is at least partially determined based on hydration of the stratum corneum.
9. The method of claim 2 wherein a four edge algorithm is used to control lancet velocity.
10. The method of claim 2 wherein there are at least 30 different decision points to change lancet velocity during penetration.
11. The method of claim 2 wherein there are at least 30 different decision points to change lancet velocity prior to the lancet reaching a stopped position in the tissue.
12. The method of claim 2 further comprising using a first detection algorithm on a lancet inbound phase and a second detection algorithm on a lancet outbound phase.
13. The method of claim 2 controlling lancet velocity to within 1% at a speed of 5 m/s.
14. The method of claim 2 lancing according to regional velocity profiles based on variation of cell type.
15. The method of claim 2 lancing according to regional velocity, said velocity base on changes of regional cell types and the resistance they provide.
16. The method of claim 2 lancing according to regional velocity profiles based on location to pain sensors.
17. The method of claim 2 wherein position and velocity are determined based on cell population and distribution in the different zones of tissue.
18. The method of claim 2 wherein said lancet has a maximum velocity through a stratum corneum, has a velocity in the epidermis sufficient to reduce shock waves to pain sensor in dermis, and a velocity through in the dermis sufficient for efficient cutting of blood vessels without stimulating pain sensors.
19. The method of claim 1 wherein said penetrating member achieves a penetrating member velocity between about 4 to 10 m/s while in at least one of the layers of tissue.
20. The method of claim 1 wherein said penetrating member achieves a penetration depth, as measured from a surface of the tissue, of between about 0.5 to about 2.0 mm.
21. The method of claim 1 wherein said penetrating member is sufficient to minimize nerve stimulation while maintaining cutting efficiency.
22. The method of claim 1 wherein said second velocity is the same as the first velocity.
23. The method of claim 1 wherein said first velocity is at least partially determined based on hydration of the stratum corneum.
24. The method of claim 1 wherein said second velocity is at least partially determined based on hydration of the stratum corneum.
25. The method of claim 1 wherein a four edge algorithm is used to control penetrating member velocity.
26. The method of claim 1 wherein there are at least 30 different decision points to change penetrating member velocity during penetration.
27. The method of claim 1 wherein there are at least 30 different decision points to change penetrating member velocity prior to reaching.
28. The method of claim 1 further comprising using a first detection algorithm on a penetrating member inbound phase and a second detection algorithm on a penetrating member outbound phase.
29. The method of claim 1 controlling penetrating member velocity to within 1% at a speed of 5 m/s.
30. The method of claim 1 lancing according to regional velocity profiles based on variation of cell type.
31. The method of claim 1 lancing according to regional velocity, said velocity based on changes of regional cell types and the resistance they provide.
32. The method of claim 1 lancing according to regional velocity profiles based on location to pain sensors.
33. The method of claim 1 wherein position and velocity are determined based on cell population and distribution in the different zones of tissue.
34. The method of claim 1 wherein said penetrating member has a maximum velocity through a stratum corneum, has a velocity in the epidermis sufficient to reduce shock waves to pain sensor in dermis, and a velocity through in the dermis sufficient for efficient cutting of blood vessels without stimulating pain sensors.