AutoNRT™: An automated system that measures ECAP thresholds with the Nucleus® Freedom™ cochlear implant via machine intelligence

Botros, Andrew; Dijk, Bas van; Killian, Matthijs

doi:10.1016/j.artmed.2006.06.003

Cited by 72 publications

(55 citation statements)

References 12 publications

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“…Current cochlear implant systems consist of (I) an stimulus receiver with a multichannel electrode array that are surgically implanted and (II) an external sound or speech processing unit (usually worn behind the ear) that controls the implant over a transcutaneous radio frequency link [1].…”

Section: Introductionmentioning

confidence: 99%

“…The e-ECAP test can be used to objectively fit the sound processing system, verifying implant and auditory nerve integrity during surgery and also to monitor recipient progress [1].…”

Section: Introductionmentioning

confidence: 99%

“…The system applies an electrical pulse on a given intracochlear electrode and the evoked neural response is recorded at a neighboring electrode [1]. In two different commercially available devices this test is named differently.…”

Section: Introductionmentioning

confidence: 99%

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Effect of depth of general anesthesia on the threshold of electrically evoked compound action potential in cochlear implantation

Eftekharian

Amizadeh

Mottaghi

et al. 2014

Eur Arch Otorhinolaryngol

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The purpose of the present study was to evaluate effect of depth of general anesthesia on the threshold of electrically evoked compound action potential in cochlear implantation. A prospective clinical study in a single-subject design was conducted in the cochlear implant center of a tertiary care University-based hospital. Sixty-one cochlear-implanted children with bilateral, severe to profound sensory neural hearing loss were enrolled in the study. During the operation electrically evoked compound action potentials (e-ECAP) were measured in two phase of general anesthesia; in deep and in light anesthesia. Thresholds of e-ECAP in these two phases of anesthesia were compared. Thirty-one children received HiRes90k1j prosthesis and 30 children received CI24RE prosthesis. Thresholds difference of electrically evoked compound action potential between light and deep anesthesia in all tested electrodes in either group were statistically significant (P < 0.001). Non-measurable e-ECAP in some electrodes at deep anesthesia was measurable in light phase of anesthesia. Depth of anesthesia can have significant influence on e-ECAP threshold and it is important to reduce the depth of anesthesia to achieve better results.

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Section: Introductionmentioning

confidence: 99%

“…The e-ECAP test can be used to objectively fit the sound processing system, verifying implant and auditory nerve integrity during surgery and also to monitor recipient progress [1].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of depth of general anesthesia on the threshold of electrically evoked compound action potential in cochlear implantation

Eftekharian

Amizadeh

Mottaghi

et al. 2014

Eur Arch Otorhinolaryngol

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“…This substantially reduces NRT recording time intraoperatively, when it is used to verify that electrical stimulation produces auditory responses, and postoperatively, when using NRT to assist in speech processor fitting. In addition, a fully automatic ECAP measuring algorithm, AutoNRT™, 48 is included in the Nucleus Freedom clinical software. AutoNRT is a quick procedure for obtaining the ECAP thresholds and can be used by less experienced clinicians intraoperatively and postoperatively.…”

Section: The Ci24re Receiver-stimulatormentioning

confidence: 99%

The Development of the Nucleus^® Freedom™ Cochlear Implant System

Patrick

Busby

Gibson

2006

Trends in Amplification

178

132

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Cochlear Limited (Cochlear™) released the fourth-generation cochlear implant system, Nucleus® Freedom™, in 2005. Freedom is based on 25 years of experience in cochlear implant research and development and incorporates advances in medicine, implantable materials, electronic technology, and sound coding. This article presents the development of Cochlear's implant systems, with an overview of the first 3 generations, and details of the Freedom system: the CI24RE receiver-stimulator, the Contour Advance™ electrode, the modular Freedom processor, the available speech coding strategies, the input processing options of SmartSound™ to improve the signal before coding as electrical signals, and the programming software. Preliminary results from multicenter studies with the Freedom system are reported, demonstrating better levels of performance compared with the previous systems. The final section presents the most recent implant reliability data, with the early findings at 18 months showing improved reliability of the Freedom implant compared with the earlier Nucleus 3 System. Also reported are some of the findings of Cochlear's collaborative research programs to improve recipient outcomes. Included are studies showing the benefits from bilateral implants, electroacoustic stimulation using an ipsilateral and/or contralateral hearing aid, advanced speech coding, and streamlined speech processor programming.

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“…It is estimated that since the 70's until today, there are 400 thousand implanted patients 6 . Cochlear implants partially replace the cochlea by turning sound into electrical signals 7 . The survival of enough neural structures in the cochlear nerve allows the transmission of electric stimuli to the cerebral cortex.…”

Section: Introductionmentioning

confidence: 99%

Comparação da telemetria de resposta neural via cocleostomia ou via janela redonda no implante coclear

Hamerschmidt¹,

Schuch²,

Rezende³

et al. 2012

Braz. j. otorhinolaryngol.

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There are two techniques for cochlear implant (CI) electrode placement: cochleostomy and the round window (RW) approach.Objective: This study aims to compare neural response telemetry (NRT) results immediately after surgery to check for possible differences on auditory nerve stimulation between these two techniques. Materials and Methods:This is a prospective cross-sectional study. Twenty-three patients were enrolled. Six patients underwent surgery by cochleostomy and 17 had it through the RW approach.Results: Mean charge units (MCU) for high frequency sounds: patients submitted to the RW approach had a mean value of 190.4 (± 29.2) while cochleostomy patients averaged 187.8 (± 32.7); p = 0.71. MCU for mid frequency sounds: patients submitted to the RW approach had a mean value of 192.5 (± 22) while cochleostomy patients averaged 178.5 (± 18.5); p = 0.23. MCU for low frequency sounds: patients submitted to the RW approach had a mean value of 183.3 (± 25) while cochleostomy patients averaged 163.8 (± 19.3); p = 0.19. Conclusion:This study showed no differences in the action potential of the distal portion of the auditory nerve in patients with multichannel cochlear implants submitted to surgery by cochleostomy or through the RW approach, using the implant itself to generate stimuli and record responses. Both techniques equally stimulate the cochlear nerve. Therefore, the choice of approach can be made based on the surgeon's own preference and experience. Braz J Otorhinolaryngol. 2012;78(4):71-5. ORIGINAL ARTICLE BJORL

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AutoNRT™: An automated system that measures ECAP thresholds with the Nucleus® Freedom™ cochlear implant via machine intelligence

Cited by 72 publications

References 12 publications

Effect of depth of general anesthesia on the threshold of electrically evoked compound action potential in cochlear implantation

Effect of depth of general anesthesia on the threshold of electrically evoked compound action potential in cochlear implantation

The Development of the Nucleus^® Freedom™ Cochlear Implant System

Comparação da telemetria de resposta neural via cocleostomia ou via janela redonda no implante coclear

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AutoNRT™: An automated system that measures ECAP thresholds with the Nucleus® Freedom™ cochlear implant via machine intelligence

Cited by 72 publications

References 12 publications

Effect of depth of general anesthesia on the threshold of electrically evoked compound action potential in cochlear implantation

Effect of depth of general anesthesia on the threshold of electrically evoked compound action potential in cochlear implantation

The Development of the Nucleus® Freedom™ Cochlear Implant System

Comparação da telemetria de resposta neural via cocleostomia ou via janela redonda no implante coclear

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Product

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The Development of the Nucleus^® Freedom™ Cochlear Implant System