Lancet for capillary puncture blood samples

• US 5,674,236 A
• Filed: 04/30/1996
• Issued: 10/07/1997
• Est. Priority Date: 04/30/1996
• Status: Expired due to Term

• Current Assignee: Medtronic Hemptec Incorporated
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Baugh, Robert F.
• Primary Examiner(s): LEWIS, WILLIAM W
• Application Number:
  US08/640,276
• Time in Patent Office: 525 Days
• Field of Search: 604/265, 604/266, 606/181-183, 128/770
• US Class Current: 606/181
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150427 Specific tip design, e.g. for improved penetration characteristics
• CPC Class Codes: A61B 5/150511 Details of construction of shaft
• CPC Class Codes: A61B 5/150755 Blood sample preparation for further analysis, e.g. by separating blood components or by mixing
• CPC Class Codes: A61B 5/15105 Purely manual piercing, i.e. the user pierces the skin without the assistance of any driving means or driving devices
• CPC Class Codes: A61B 5/15142 Devices intended for single use, i.e. disposable

Abstract

A lancet for obtaining a drop of blood by capillary puncture is formed by a needle having a coating thereon of a composition which precludes contact clotting activation of the blood sample.

Claims

1. A lancet for obtaining a drop of blood for analysis by capillary puncture comprising a needle having a coating thereon of a composition which precludes contact activation, platelet activation, and fibrinolysis of a blood sample obtained by capillary puncture.

2. A lancet for obtaining blood samples by capillary puncture comprising a lancet and a coating on the surface of said lancet of a composition including a blood platelet inhibitor, a prostacyclin analog and a monoclonal antibody to thromboplastin.

3. A lancet as defined in claim 2 wherein said composition includes aprotinin.