发明名称 |
VERFAHREN UND VORRICHTUNG ZUR SEHR GENAUEN BESTIMMUNG DER LAGE EINES GEGENSTANDES INNERHALB BIOLOGISCHEN GEWEBES |
摘要 |
The position of a device such as an endotracheal tube 100 inside biological tissue is detected by a probe 20 which generates a small magnetic field which is disturbed by a magnetically permeable metal band 104 in the device when a narrow end of the probe is positioned immediately adjacent to tissue containing the metal band. The probe 20 comprises a central coil producing an AC magnetic field positioned between two co-axial coils for sensing disturbances in the field. Signals from the sensing coils are amplified, integrated, and sent to respective inputs of a comparator which controls the frequency of an oscillator. Thus the frequency emitted by a speaker 34 and the selection of one of a series of LED's 36 indicate the proximity of the metal band 104. <IMAGE> |
申请公布号 |
DE3217234(A1) |
申请公布日期 |
1982.12.16 |
申请号 |
DE19823217234 |
申请日期 |
1982.05.07 |
申请人 |
MCCORMICK LABORATORIES,INC. |
发明人 |
GORDON BRESLER,ROBERT;MCCORMICK,WILLIAM |
分类号 |
A61B5/06;A61M16/04;G01V3/10;G01V3/11 |
主分类号 |
A61B5/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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