Stapedius Reflex Detector LEONARDO
- Small size, unlike the cumbersome middle ear analyzers.
- Instrument dedicated to the mapping of cochlear implant or fitting in difficult prosthetics.
- Dedicated software with the possibility to have the overlay screen, stay on top, so that the specialist has everything on one screen while working without distractions.
- The practicality of the small probe for the detection of the eSRT (or of the SR) even in conditions where the baby moves and can find annoying the cumbersome probe of a normal middle ear analyzer.
- SW dedicated to the real time function, where it is not necessary to set the middle ear analyzer in decay test mode with different stratagems to have a window of 10/20 seconds. Ideally the exam can last indefinitely.
- Possibility to scroll back and forth, in the case of particularly long-lasting examinations, with the time window of detection.
- Possibility to enlarge the path through the use of different CC value scales.
- External stimulus, “real” sound (free field with a loudspeaker, human voice, …).
- Exams carried out at the 0Pa pressor, without tensioning the eardrum and the ossicles.
The Stapedius Riflex Detector LEONARDO is a revolutionary tool, PC-based, conceived by HORENTEK for the detection of the contraction of the stapedius muscle. High precision through continuous and real-time detection of volume variations within the ear canal between insert and tympanic membrane; LEONARDO is able to detect volumetric changes in cavities between -0.30cc and + 5.00cc. LEONARDO Stapedius Reflex Detector is highly reliable, easy to use thanks to the intuitive interface and has a modern and lightweight design that allows effortless transport.
LEONARDO was conceived by HORENTEK for the identification of the contraction of the Staple Reflex, speeding up the cochlear mapping process and providing absolute precision to the specialist. Furthermore, LEONARDO can be used in difficult hearing aids fitting, for example when recruitment is present.
In the clinical practice of cochlear implant mapping when there are collaborating adult subjects the T Level (threshold level), or the minimum audibility threshold is easily identifiable by audiometry (free field); with children, including newborns, we can use behavioral audiometry, which, however, can leave us unsure as it is subjective. The problems increase with the C level / MCL (most comforable level), since there may be more doubts about the reliability of the child’s response.
The need to find objective methods was presented when non-collaborating subjects (i.e. children), people who for a long time have been subjected to auditory deprivation or deaf people since birth and consequently not able to quantify the intensity of the sound to which they are subjected.
The most accredited objective methods are eCAP (eletrically compound action potential) and eSRT (electrically elicited stapedius reflex thresholds). eCAP is performed (after the cochlear implant surgery) going to stimulate electrode by electrode and thus obtaining T level and MCL (or C level), a dedicated SW is needed to obtain these results from the I.C.
eSRT, on the other hand, although having an evacuation of about 60% among patients, the search for MCL level is much more streamlined and “safe”, since it avoids over-stimulation of the implant on average.
Various scientific studies identify the greater relevance and importance of a good regulation of MCL / C level, compared to T level, when MCL influences language and speech understanding; eSRT is particularly suitable for the identification of MCL / C level, thus becoming a standard in the mapping of I.C.
eCAP, however, is a useful tool in cases where eSRT can not be evoked, especially useful for obtaining the T level, rather than the “subtraction” operations once evoked eSRT (~ 90dB HL).