A reconnectable multiway implantable connector

Rushton, D. N.; Tromans, A M; Donaldson, Nick

doi:10.1016/s1350-4533(02)00042-5

Cited by 9 publications

(18 citation statements)

References 6 publications

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“…Although studies have shown no significant difference in classification accuracy of pattern recognition-based myoelectric controllers utilising surface vs. intramuscular electrodes [4,18], such experiments were carried out in the ideal laboratory environment, where problems related to the long-term consistency of signals were not fully investigated. These include signal changes due to skin impedance secondary to sweating, the need for repeated placements of electrodes, accuracy and consistency of electrode placement, electrode lift-off and motion artefact.…”

Section: Discussionmentioning

confidence: 99%

“…Small alterations to the hard-wired system, such as the introduction of multiplexing, tripolar electrodes and electrode-site preamplification can be used to reduce the complexity of the implant-prosthesis connection, increase noise rejection, and reduce the noise resulting from cable motion respectively. Electrodes can be connected intraoperatively to the multiplexer using a reconnectable multiway implantable connector, which was shown to provide a stable long-term connection in human applications [18]. This setup allows individual replacement of electrodes/multiplexer should a fault arise in the future, without the need to replace the entire device.…”

Section: Discussionmentioning

confidence: 99%

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The Use of a Bone-Anchored Device as a Hard-Wired Conduit for Transmitting EMG Signals From Implanted Muscle Electrodes

Al-Ajam

Lancashire

Pendegrass

et al. 2013

IEEE Trans. Biomed. Eng.

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Abstract-The use of a bone-anchored device to transmit electrical signals from internalised muscle electrodes was studied in a sheep model. The bone-anchored device was used as a conduit for the passage of a wire connecting an internal epimysial electrode to an external signal-recording device. The boneanchored device was inserted into an intact tibia and the electrode attached to the adjacent M. peroneus tertius. 'Physiological' signals with low signal to noise ratios were successfully obtained over a 12-week period by walking the sheep on a treadmill. Reliable transmission of multiple muscle signals across the skin barrier is essential for providing intuitive, biomimetic upper-limb prostheses. This technology has the potential to provide a better functional and reliable solution for upper-limb amputee rehabilitation: attachment and control.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The Use of a Bone-Anchored Device as a Hard-Wired Conduit for Transmitting EMG Signals From Implanted Muscle Electrodes

Al-Ajam

Lancashire

Pendegrass

et al. 2013

IEEE Trans. Biomed. Eng.

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“…long-term implantability, reusability and a high channel count. Pin and socket designs as the Craggs connector [7] and the in-line connector [1] perform well in implants for bladder control [8], anterior root stimulation [9] and other neuroprostheses [10]. However, upscaled to high channel counts this concept would take up too much volume.…”

Section: Introductionmentioning

confidence: 99%

“…However, upscaled to high channel counts this concept would take up too much volume. Furthermore, both systems can only be reused once [9,10]. Current pacemakers and neuromodulators use annular contact pads on the male connector part arranged in-line with the cable.…”

Section: Introductionmentioning

confidence: 99%

Development of a multichannel implantable connector

Koch

Ordonez

Schüettler³

2015

2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

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Further development of active implantable medical devices (AIMDs) coming along with higher channel counts and improved maintainability raises the requirements for implantable connectors in such systems. We developed a concept for an implantable multichannel connector. Contact pads manufactured by laser-structuring that are embedded into a silicone substrate serve as contact partners. Processing features specific to two laser technologies were exploited not only to cut the materials but also to 3D-shape the surfaces of the contact pads. First tests for the long-term behavior show stable contact and isolation properties during 6 weeks of soaking at elevated temperature.

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“…The construction and the results of the original tests were described by DONALDSON (1983): in the flexion tests, the cable withstood 65 million flexions round a 5 mm radius pulley under saline and 40 million round a 3 mm pulley. The cable is often used with connectors (DONALDSON, 1985), and these can be used for connection once at operation or be 're-connectable' as part of a repair procedure (RUSHTON et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Noise from implantable Cooper cable

Carrington

Zhang

Donaldson

2005

Med. Biol. Eng. Comput.

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Cooper cable is made for implanted devices, usually for connection to stimulating electrodes. An experiment has been performed to see whether these cables would be satisfactory for recording electroneurogram (ENG) signals from cuffs. Four cables were subjected to continuous flexion at 2 Hz while submerged in saline. The cables were connected to a low-noise amplifier, and the noise was measured using a spectrum analyser. These cables had not fractured after 184 million flexions, and the noise in the neural band (500-5000 Hz) had not increased owing to age. Noise in the ENG band increased by less than 3 dB owing to the motion. A fifth, worn cable did fail during the experiment, the conductors becoming exposed to the saline, but this was only apparent by extra noise when the cable was in motion. After 184 million flexions, the four cables were given a more severe test: instead of being connected to the amplifier reference node, two of the four cores of each cable were connected to 18V batteries. Two of the cables were then noisier, but only when in motion, presumably because of leakage between cores. Cooper cables are excellent for transmitting neural signals alone; transmission in one cable of neural signals and power supplies should be avoided if possible.

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A reconnectable multiway implantable connector

Cited by 9 publications

References 6 publications

The Use of a Bone-Anchored Device as a Hard-Wired Conduit for Transmitting EMG Signals From Implanted Muscle Electrodes

The Use of a Bone-Anchored Device as a Hard-Wired Conduit for Transmitting EMG Signals From Implanted Muscle Electrodes

Development of a multichannel implantable connector

Noise from implantable Cooper cable

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