公开(公告)号：WO1992003090A1

公开(公告)日：1992-03-05

申请号：PCT/GB1991001431

申请日：1991-08-23

Applicant: IMPERIAL COLLEGE OF SCIENCE, TECHNOLOGY & ... ,  GUY, Christopher, Neil ,  GILLIES, Duncan, Fyfe

Inventor： IMPERIAL COLLEGE OF SCIENCE, TECHNOLOGY & ...

IPC: A61B05/06

CPC classification number: A61B5/06 ,  A61B5/065 ,  G01V3/105 ,  Y10S128/903

Abstract: A probe system for use in carrying out inspections in an enclosed, non-conducting environment, such as an endoscope for use in carrying out internal inspections of a human or animal patient, comprises sensing coils (7) mounted at spaced positions along the probe (6) for movement with the latter and a planar grid array (1) of antennas (2) which is disposed adjacent the environment. AC electrical signals are supplied to the antennas, either simultaneously or sequentially, by an electrical source (4,5) so as to induce corresponding voltage signals in the sensing coils (7). When the probe (6) is introduced into the environment, the induced signals, converted to a digital format, are processed by a microprocessor (12) to produce a visual indication of the three dimensional location of the probe (6) with respect to the antenna array (1).

公开(公告)号：WO1990002514A1

公开(公告)日：1990-03-22

申请号：PCT/US1989003989

申请日：1989-09-13

Applicant: PHARMACIA DELTEC INC. ,  STROHL, Clair, L., Jr. ,  FERRAGAMO, Michael, C. ,  KAY, Donald, A. ,  SHAPIRO, Alan, R. ,  WHIPPLE, Gary, R.

Inventor： PHARMACIA DELTEC INC.

IPC: A61B05/06

CPC classification number: A61B5/06 ,  A61B5/062

Abstract: A method and apparatus (10) for determining accurately the location of the tip (14) of a catheter (16) inside biological tissue is disclosed including a locator (34) having a coil (38) wound axially on a core (36) and a detector (12) in the form of a coil (28) wound on a core (24) removably positionable within catheter (16) adjacent the tip (14). A controller (20) generates AC current to coil (38) to produce an electromagnetic field and compares it with the output voltage developed in coil (28) when the locator (34) comes within close physical proximity to detector (12). Locator (34) includes an amber LED indicator (42) which is energized when the locator (34) is behind the detector (12) and the monitored output voltage is in phase with the generated alternating current and includes a red LED indicator (44) which is energized when the locator (34) is beyond the detector (12) and the monitored output voltage is 180° out of phase with the generated alternating current. The controller (20) includes a beeper (48) which provides an audible indicator when energization changes between the indicators (42, 44).

Abstract translation: 公开了一种用于准确地确定生物组织内的导管（16）的尖端（14）的位置的方法和装置（10），包括定位器（34），该定位器具有轴向地卷绕在芯部（36）上的线圈（38） 卷绕在芯子（24）上的线圈（28）形式的检测器（12），其可拆卸地定位在邻近尖端（14）的导管（16）内。 控制器（20）产生交流电流到线圈（38）以产生电磁场，并且当定位器（34）进入与物体接近检测器（12）时，与线圈（28）中产生的输出电压进行比较。 定位器（34）包括琥珀色LED指示器（42），当定位器（34）位于检测器（12）后面时被激励，并且所监视的输出电压与产生的交流电流同相并且包括红色LED指示器（44） 当定位器（34）超出检测器（12）并且所监视的输出电压与产生的交流电流相差180°时，其被通电。 控制器（20）包括蜂鸣器（48），当在指示器（42,44）之间通电时，提供可听指示器。