Needle-insertion device
First Claim
1. A lancing apparatus configured for sampling a body fluid out of a skin, the apparatus comprising a housing including a cylindrical portion adapted to be brought into contact with the skin, an insertion element movable relative to the housing for sticking the skin, and a negative pressure generator configured to generate a negative pressure inside the cylindrical portion to cause the skin to swell upward,wherein the apparatus further comprises a height detector and a pressure controller configured to cooperate with the height detector, the height detector being configured for detecting that the skin has been raised to a predetermined height inside the cylindrical portion, the height detector being provided separately from the insertion element and including a tapered face that is adapted to come into contact with the skin when the skin swells upward, the pressure controller being configured to execute a control so as to maintain a pressure inside the cylindrical portion within a specific range, the pressure controller being configured to execute the control based on detection by the height detector that the skin has been raised to the predetermined height, the pressure controller being configured to define the specific range by granting a specific tolerance to a reference pressure that the pressure controller is configured to set at a lower value than the pressure inside the cylindrical portion at a time that the height detector has detected that the skin has been raised to the predetermined height.
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Accused Products
Abstract
This invention relates to a lancing apparatus (A1) used for inserting an insertion element (21) into a human skin (Sk) for sampling a body fluid. The lancing apparatus (A1) includes a housing (1) with a cylindrical portion (12) brought into contact with the skin (Sk), a negative pressure generator (6) that generates a negative pressure inside the cylindrical portion (12) to cause the skin (Sk) to swell upward, and a detector (5) that detects that the skin (Sk) has been raised to a predetermined height inside the cylindrical portion (12).
34 Citations
25 Claims
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1. A lancing apparatus configured for sampling a body fluid out of a skin, the apparatus comprising a housing including a cylindrical portion adapted to be brought into contact with the skin, an insertion element movable relative to the housing for sticking the skin, and a negative pressure generator configured to generate a negative pressure inside the cylindrical portion to cause the skin to swell upward,
wherein the apparatus further comprises a height detector and a pressure controller configured to cooperate with the height detector, the height detector being configured for detecting that the skin has been raised to a predetermined height inside the cylindrical portion, the height detector being provided separately from the insertion element and including a tapered face that is adapted to come into contact with the skin when the skin swells upward, the pressure controller being configured to execute a control so as to maintain a pressure inside the cylindrical portion within a specific range, the pressure controller being configured to execute the control based on detection by the height detector that the skin has been raised to the predetermined height, the pressure controller being configured to define the specific range by granting a specific tolerance to a reference pressure that the pressure controller is configured to set at a lower value than the pressure inside the cylindrical portion at a time that the height detector has detected that the skin has been raised to the predetermined height.
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21. A lancing apparatus used for sampling a body fluid out of a skin, the apparatus comprising:
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a housing including a cylindrical portion that is adapted to be brought into contact with the skin; an insertion element movable relative to the housing for sticking the skin; a negative pressure generator that is configured to generate a negative pressure inside the cylindrical portion to cause the skin to swell upward; a height detector that is configured to detect that the skin has been raised to a predetermined height inside the cylindrical portion, the height detector being provided separately from the insertion element; a pressure detector that is configured to detect a pressure inside the cylindrical portion; and a controller that is configured to execute a control so as to maintain a pressure inside the cylindrical portion within a specific range, after the height detector has detected that the skin has been raised to the predetermined height, the controller being configured to define the specific range by granting a specific tolerance to a reference pressure; wherein the controller is configured to set the reference pressure based on the pressure detected by the pressure detector at a time that the height detector has detected that the skin has been raised to the predetermined height. - View Dependent Claims (22, 23, 24)
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25. A blood sampling apparatus used for measuring glucose concentration in blood, the apparatus comprising:
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a housing including a cylindrical portion that is adapted to be brought into contact with skin; an insertion element movable relative to the housing for sticking the skin; a negative pressure generator for generating a negative pressure inside the cylindrical portion to cause the skin to swell upward; a height detector for detecting that the skin has been raised to a predetermined height inside the cylindrical portion; and a controller configured to cooperate with the height detector, the controller being configured to execute a control so as to maintain a pressure inside the cylindrical portion within a specific range, the controller being configured to execute the control based on detection by the height detector that the skin has been raised to the predetermined height; wherein the controller is configured to define the specific range by granting a specific tolerance to a reference pressure which the controller sets at a lower value than the pressure inside the cylindrical portion at a time that the height detector has detected that the skin has been raised to the predetermined height.
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Specification