Testing implants
    7.
    发明授权
    Testing implants 失效
    测试植入物

    公开(公告)号:US5392779A

    公开(公告)日:1995-02-28

    申请号:US129076

    申请日:1993-10-28

    摘要: Method and apparatus for testing an implant attached to a bone of a human or animal subject includes a member releasably attached to the implant. The member carries a transducer for exciting the member with a variable frequency AC signal, and a transducer for detecting a resonance frequency of the member. The detected resonance frequency is used to assess the degree of attachment of the implant to the bone.

    摘要翻译: PCT No.PCT / GB92 / 00663 Sec。 371日期:1993年10月28日 102(e)日期1993年10月28日PCT提交1992年4月13日PCT公布。 公开号WO92 / 18053 1992年10月29日的日期。用于测试附着在人或动物对象的骨头上的植入物的方法和装置包括可释放地附接到植入物的构件。 该构件携带用于激发具有可变频率AC信号的构件的换能器,以及用于检测构件的共振频率的换能器。 检测到的共振频率用于评估植入物与骨骼的连接程度。

    Method and apparatus for determining osseous implant fixation integrity
    9.
    发明授权
    Method and apparatus for determining osseous implant fixation integrity 失效
    用于确定骨植入物固定完整性的方法和装置

    公开(公告)号:US5024239A

    公开(公告)日:1991-06-18

    申请号:US463427

    申请日:1990-01-11

    摘要: An apparatus for detecting loosening of an implant imbedded in a bone of a limb of a patient, includes a vibrator is pressed into engagement with the limb to impart vibratory motion to the bone. The vibrator is controlled to cause the vibratory motion to have a predetermined recurring pattern. A pickup device is pressed into engagement with the limb spaced from the vibrator over the same bone near the implant, for detecting the vibratory motion transmitted through the bone implant composite to generate an output signal. Implant loosening is determined when the recurring pattern of the output signal transmitted through the bone implant composite demonstrates sustained superimposition on the oscilloscope and/or significant secondary harmonics on the spectrum analyzer.

    摘要翻译: 一种用于检测嵌入在患者肢体的骨头中的植入物的松动的装置,包括:振动器被压入与所述肢体接合以赋予骨振动运动。 控制振动器以使振动运动具有预定的重复模式。 拾取装置被压入与距离植入物附近的相同骨骼上与振动器间隔开的肢体接合,用于检测通过骨植入物复合体传递的振动,以产生输出信号。 当通过骨注入复合体传输的输出信号的循环模式显示示波器上的持续叠加和/或频谱分析仪上显着的二次谐波时,确定植入物松动。

    Functional evaluation device capable of evaluating an artificial device
by the use of acoustic emission
    10.
    发明授权
    Functional evaluation device capable of evaluating an artificial device by the use of acoustic emission 失效
    能够通过使用声发射来评价人造装置的功能评价装置

    公开(公告)号:US4819753A

    公开(公告)日:1989-04-11

    申请号:US929771

    申请日:1986-11-13

    摘要: In a functional evaluation device for use in evaluating functional degradation of an artificial device buried in a living body, frequency zones of acoustic emission are detected by the use of the fact that the functional degradation brings about variation of the frequency zones. The acoustic emission may be measured at two different positions adjacent to the artificial device so as to detect an arrival time difference of the acoustic emission and to thereby locate the functional degradation. The acoustic emission is therefore picked up by a pair of transducers placed at the two positions and is processed by a processing circuit for detecting whether or not the functional degradation takes place and by a determining circuit for locating the functional degradation.

    摘要翻译: 在用于评估埋藏在生物体中的人造装置的功能降解的功能评价装置中,通过使用功能劣化引起频率区域的变化的事实来检测声发射的频率区域。 可以在与人造装置相邻的两个不同位置处测量声发射,以便检测声发射的到达时间差,从而定位功能退化。 因此,声发射被放置在两个位置处的一对换能器拾取,并且由用于检测功能劣化是否发生的处理电路以及用于定位功能劣化的确定电路来处理。