Vacuum assisted lancing system with controlled rate and method for blood extraction with minimal pain
First Claim
1. A lancing system for blood extraction, comprising:
- a first tubular body having a central longitudinal axis, a lancing end and a longitudinally opposite free end, the lancing end including a sealing device for sealingly engaging a surface to be lanced;
a lancing assembly coupled to the body, the lancing assembly having a lance coupler slideably coupled with the lancing end of the body;
a main shaft slideably coupled with the body along the longitudinal axis, the main shaft having an actuating end disposed inside the body;
a first piston coupled to the main shaft and slideably and sealably disposed within the body, the first piston being biased toward a rest position;
wherein the body forms at least a portion of a vacuum chamber when the sealing device engages the surface to be lanced, the vacuum chamber being in fluid communication with the surface;
a valveless opening through a wall of the tubular body that allows fluid communication between the vacuum chamber and an atmosphere surrounding the lancing system when the first piston is in the rest position, the rest position being between the valveless opening and the free end of the tubular body; and
wherein the lancing assembly is adapted to create a vacuum prior to lancing and dissipate the vacuum at a controlled rate by allowing air to flow into the vacuum chamber from the atmosphere through the opening.
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Abstract
A lancing system can include a first device body having a lancing end and a free end, the lancing end including a sealing device, a lancing assembly having a lance coupler slideably coupled with the lancing end, a main shaft slideably coupled with the body, a first piston disposed within the body, wherein the lancing assembly is adapted to create a vacuum prior to lancing and dissipate the vacuum at a controlled rate. The system can include a second device body fluidicly coupled to the first device body and having a second shaft and a second piston. A method of extracting blood can include coupling the sealing device to a surface, creating a vacuum, lancing the surface, and dissipating the vacuum at a controlled rate.
25 Citations
33 Claims
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1. A lancing system for blood extraction, comprising:
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a first tubular body having a central longitudinal axis, a lancing end and a longitudinally opposite free end, the lancing end including a sealing device for sealingly engaging a surface to be lanced; a lancing assembly coupled to the body, the lancing assembly having a lance coupler slideably coupled with the lancing end of the body; a main shaft slideably coupled with the body along the longitudinal axis, the main shaft having an actuating end disposed inside the body; a first piston coupled to the main shaft and slideably and sealably disposed within the body, the first piston being biased toward a rest position; wherein the body forms at least a portion of a vacuum chamber when the sealing device engages the surface to be lanced, the vacuum chamber being in fluid communication with the surface; a valveless opening through a wall of the tubular body that allows fluid communication between the vacuum chamber and an atmosphere surrounding the lancing system when the first piston is in the rest position, the rest position being between the valveless opening and the free end of the tubular body; and wherein the lancing assembly is adapted to create a vacuum prior to lancing and dissipate the vacuum at a controlled rate by allowing air to flow into the vacuum chamber from the atmosphere through the opening. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of extracting blood with a vacuum assisted lancing system including a first tubular body having a lancing end and a longitudinally opposite free end, the lancing end including a sealing device for sealingly engaging a surface to be lanced, a lancing assembly coupled to the body, the lancing assembly having a lance coupler slideably coupled with the lancing end of the body, a main shaft slideably coupled with the body, the main shaft having an actuating end disposed inside the body, a first piston coupled to the main shaft and slideably and sealably disposed within the body, the first piston being biased toward a rest position, a valveless opening through a wall of the first tubular body that allows fluid communication between the interior of the first tubular body and an atmosphere surrounding the lancing system when the first piston is in the rest position, the rest position being between the valveless opening and the free end of the first tubular body;
- and a lance coupled to the lance coupler, the method comprising;
coupling the sealing device to a surface; creating a vacuum by moving the first piston toward the free end of the first tubular body; lancing the surface; dissipating the vacuum at a controlled rate; and removing the sealing device from the surface. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
- and a lance coupled to the lance coupler, the method comprising;
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23. A method of extracting blood with a vacuum assisted lancing system including a first tubular body having a lancing end and a longitudinally opposite free end, the lancing end including a sealing device for sealingly engaging a surface to be lanced, a lancing assembly coupled to the body, the lancing assembly having a lance coupler slideably coupled with the lancing end of the body, a main shaft slideably coupled with the body, the main shaft having an actuating end disposed inside the body, wherein the body forms at least a portion of a vacuum chamber;
- a first piston coupled to the main shaft and slideably and sealably disposed within the body, a second tubular body disposed outside of the first tubular body, the second tubular body having a first end fluidicly coupled to the vacuum chamber and a longitudinally opposite second end, a second shaft slideably coupled with the second tubular body, a second piston coupled to the second shaft and disposed within the second tubular body, at least one of the first and second pistons being biased toward a rest position;
a valveless opening through a wall of the first tubular body that allows fluid communication between the vacuum chamber and an atmosphere surrounding the lancing system when the at least one piston is in the rest position, the rest position being between the valveless opening and the free end of the first tubular body; and
a lance coupled to the lance coupler, the method comprising;coupling the sealing device to a surface; creating a vacuum;
lancing the surface;dissipating the vacuum at a controlled rate; and removing the sealing device from the surface. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
- a first piston coupled to the main shaft and slideably and sealably disposed within the body, a second tubular body disposed outside of the first tubular body, the second tubular body having a first end fluidicly coupled to the vacuum chamber and a longitudinally opposite second end, a second shaft slideably coupled with the second tubular body, a second piston coupled to the second shaft and disposed within the second tubular body, at least one of the first and second pistons being biased toward a rest position;
Specification