Blood-collecting device

• US 5,891,053 A
• Filed: 01/27/1997
• Issued: 04/06/1999
• Est. Priority Date: 05/25/1995
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisya Advance
• Original Assignee: Kabushiki Kaisya Advance
• Inventors: Sesekura, Tetsuya
• Primary Examiner(s): Apley, Richard J.
• Assistant Examiner(s): YU, JUSTINE ROMANG
• Application Number:
  US08/776,407
• Time in Patent Office: 799 Days
• Field of Search: 128/760, 128/770, 128/765, 128/763, 128/762, 606/181, 606/182, 606/183, 600/577, 600/578, 600/573, 600/575, 600/576, 600/579, 600/583
• US Class Current: 600/583
• CPC Class Codes: A61B 5/1411 by percutaneous method, e.g. by lancet
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150068 by tissue compression, e.g. with specially designed surface of device contacting the skin area to be pierced
• CPC Class Codes: A61B 5/150099 by negative pressure, other than vacuum extraction into a syringe by pulling on the piston rod or into pre-evacuated tubes
• CPC Class Codes: A61B 5/150114 by tissue compression, e.g. with specially designed surface of device contacting the skin area to be pierced
• CPC Class Codes: A61B 5/150412 Pointed piercing elements, e.g. needles, lancets for piercing the skin blade-like piercing elements A61B5/150442
• CPC Class Codes: A61B 5/150519 Details of construction of hub, i.e. element used to attach the single-ended needle to a piercing device or sampling device
• CPC Class Codes: A61B 5/150977 Arrays of piercing elements for simultaneous piercing
• CPC Class Codes: A61B 5/15113 Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
• CPC Class Codes: A61B 5/15125 comprising a vacuum or compressed fluids
• CPC Class Codes: A61B 5/15194 fully automatically retracted, i.e. the retraction does not require a deliberate action by the user, e.g. by terminating the contact with the patient's skin

Abstract

A blood-collecting device includes a suction device for suctioning and thereby swelling a portion of a patient'"'"'s skin by decompression so that a movable paracentetic needle can be driven into the swollen skin to puncture the skin. Once the skin has been punctured, the paracentetic needle is withdrawn while suction is maintained on the swollen skin in order to draw a blood sample from the patient.

Claims

1. A blood-collecting device which comprises:

suction means for suctioning a blood collection site of a patient'"'"'s skin to induce swelling of the skin by decompression,

a moveable paracentetic member,

means for moving the paracentetic member toward the swollen skin to impact and puncture the skin, and

removal means for moving the paracentetic member away from the skin, wherein the suction means further permits blood to be drawn from the punctured skin.

2. A device according in claim 1, wherein said decompression is in a range of -45 kpa to -60 kPa gauge pressure.

3. A device according to claim 1 wherein the paracentetic member comprises a plurality of paracentetic needles.

4. A device according to claim 3, wherein the paracentetic member comprises from 2 to 6 paracentetic needles.

5. A device according to claim 1 wherein the paracentetic member comprises a single paracentetic needle.

6. A device according to claim 1, wherein the paracentetic member comprises a needle support having a flat tip surface and a needle protruding from tip surface.

7. A device according to claim 6, wherein the paracentetic needle protrudes a length of not more than 1 mm from the flat tip surface.

8. A device according to claim 1, wherein the paracentetic member comprises a needle support having an inverted V-shaped tip surface ad a needle protruding from the inverted V-shaped tip surface.

9. A device according to claim 8, wherein the paracentetic needle protrudes a length of not more than 1 mm from the inverted V-shaped tip surface.