公开(公告)号：SG50874A1

公开(公告)日：1998-07-20

申请号：SG1997002786

申请日：1997-08-05

Applicant: BECTON DICKINSON CO

Inventor： STROWE ROBERT J ,  EDIC PETER M ,  NEWELL JONATHAN C ,  MESSINA RALPH F

IPC: A61B5/05 ,  A61M5/158 ,  A61M19/00 ,  A61N1/05 ,  A61N1/36 ,  A61N1/18 ,  A61N1/32 ,  A61N2/00 ,  A61M5/32

Abstract: An electrolocation apparatus is provided for locating a nerve to which anesthesia may be delivered. The apparatus includes a needle assembly having an electrically conductive needle cannula non-conductive tube secured over the needle cannula, and a conductive plating on the tube. The conductors are connected to a stimulator that generates alternating high and low charge pulses with a constant low current level. The high charge pulses generate noticeable muscle twitches immediately after insertion of the needle into the patient. Muscle twitches responsive to the high charge pulses will peak in magnitude, and muscle twitches responsive to the low charge pulses will become observable as the needle approaches the targeted nerve, and will be indistinguishable from the muscle twitches responsive to the high charge pulses when the needle is in a position for administration of anesthetic.

公开(公告)号：MX9705948A

公开(公告)日：1998-05-31

申请号：MX9705948

申请日：1997-08-04

Applicant: BECTON DICKINSON CO

Inventor： STROWE ROBERT J ,  NEWELL JONATHAN C ,  EDIC PETER M ,  MESSINA RALPH F

IPC: A61B5/05 ,  A61M5/158 ,  A61M19/00 ,  A61N1/05 ,  A61N1/36 ,  A61M23/00

Abstract: Se proporciona un aparato de electrolocalizacion para localizar un nervio el cual puede suministrarse anestesia. El aparato incluye un conjunto de aguja que tiene una aguja eléctricamente conductora, un tubo no conductor asegurado por encima de la cánula de aguja y galvanizacion conductora sobre el tubo. Los conductores están conectados con un estimulador que genera impulsos de carga alternativa elevado y bajo con un nivel de corriente bajo constante. Los impulsos de carga elevada generan sacudidas musculares perceptibles inmediatamente después de la insercion de la aguja en el paciente. Las sacudidas musculares que responden a los impulsos de carga elevada llegarán al máximo en magnitud y las sacudidas musculares que responden a los impulsos de carga baja se harán observables a medida que la carga se aproxima al nervio de referencia y no serán capaces de distinguirse de las sacudidas musculares que responden a los impulsos de carga elevada cuando la aguja está en una posicion para la administracion del anestésico.

公开(公告)号：AU3316997A

公开(公告)日：1998-02-12

申请号：AU3316997

申请日：1997-08-05

Applicant: BECTON DICKINSON CO

Inventor： GRIFFITH RICHARD L ,  STROWE ROBERT J ,  NEWELL JONATHAN C ,  EDIC PETER M ,  MESSINA RALPH F ,  HOUGHTON FREDERICK C

IPC: A61B5/05 ,  A61M19/00 ,  A61N1/05 ,  A61N1/36

Abstract: An electrolocation apparatus is provided for locating a nerve to which anesthesia may be delivered. The apparatus includes a needle assembly having an electrically conductive needle cannula non-conductive tube secured over the needle cannula, and a conductive plating on the tube. The conductors are connected to a stimulator that generates alternating high and low charge pulses with a constant low current level. The high charge pulses generate noticeable muscle twitches immediately after insertion of the needle into .the patient. Muscle twitches responsive to the high charge pulses will peak in magnitude, and muscle twitches responsive to the low charge pulses will become observable as the needle approaches the targeted nerve, and will be indistinguishable from the muscle twitches responsive to the high charge pulses when the needle is in a position for administration of anesthetic.