Blood vessel entry indicator

• US 5,954,701 A
• Filed: 09/05/1997
• Issued: 09/21/1999
• Est. Priority Date: 01/05/1996
• Status: Expired due to Term

• Current Assignee: Vascular Technologies Limited
• Original Assignee: Vascular Technologies Limited
• Inventors: Matalon, Eli
• Primary Examiner(s): MENDEZ, MANUEL A
• Application Number:
  US08/913,791
• Time in Patent Office: 746 Days
• Field of Search: 604/272, 604/264, 604/280, 73/85, 73/839
• US Class Current: 604/272
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150748 Having means for aiding positioning of the piercing device at a location where the body is to be pierced means for aiding positioning of devices for bringing media into the body A61M5/427, locating blood vessels A61B5/489
• CPC Class Codes: A61B 5/150809 by audible feedback
• CPC Class Codes: A61B 5/150824 by visual feedback
• CPC Class Codes: A61B 5/1535 comprising means for indicating vein or arterial entry A61B5/1545 takes precedence
• CPC Class Codes: A61M 25/0693 Flashback chambers

Abstract

This invention is a device for detecting and indicating a situation where an intravascular needle (1) has entered a blood conducting vein or artery. The device is to be connected to the distal end of the conduit which includes a female luer connector (2) while the device has a male connector (3). The device includes a sensitive pressure sensor (6) which responds to changes of pressure from the moment of entry of blood into the needle and activates a signal (8).

Claims

1. A device indicator for a medical cannula or needle for penetration of a living body which indicates by a signal the location of the distal end of a needle which is connected to said device at the time of actual use of the respective cannula when the needle thereof has entered a blood or liquid conducting or containing vessel, said device comprising a housing adapted to be connected to a cannula or needle, within said device there is provided a pressure sensor which is connected to a signal processing element which in turn is connected to a signal emitting means, all components being connected to an electric power source.

2. A device as claimed in claim 1 whereby said device is connected to said cannula or needle by means of a luer connection.

3. A device as claimed in claim 1 whereby said device is integral with said needle.

4. A device according to claim 1 whereof the signal is an audible signal.

5. The device according to claim 1 whereof the signal is a LED.

6. A device as claimed in claim 1 wherein said cannula is used as an introducer for a catheter.