1-20 of 257 Search Results for

khz

Sort by
Book Chapter
Series: Progress in Neurological Surgery
Volume: 35
Published: 18 December 2020
10.1159/000509665
EISBN: 978-3-318-06795-8
... for peripheral nerve stimulation, available until the last decade, utilised frequencies in the range 1–100 Hz. With the commercial introduction of 10-kHz spinal cord stimulation, there has been renewed interest in peripheral applications of kHz frequency neuromodulation. High-frequency biphasic stimulation...
Book Chapter
Series: Advances in Oto-Rhino-Laryngology
Volume: 69
Published: 07 July 2010
10.1159/000318522
EISBN: 978-3-8055-9471-4
... a mean decrease in pure tone averages of 3.9 dB (0.25–8 kHz). Gain at threshold level (unaided thresholds minus AMEI-aided thresholds) was, on average, 20.9 dB at 0.5 kHz, 20.5 dB at 1 kHz, 23.8 dB at 2 kHz, 30.2 dB at 3 kHz, 36.1 dB at 4 kHz, 37.6 dB at 6 kHz and 37.9 dB at 8 kHz. Monosyllabic word...
Book Chapter
Series: Advances in Oto-Rhino-Laryngology
Volume: 65
Published: 22 January 2007
10.1159/000098857
EISBN: 978-3-318-01343-6
... Abstract 23 patients were studied preoperatively, 17 at 2 months and 11 at 6 months. Using cutoff at30 dB HL (air-conduction), 2-month success rate was 5 of 17 patients (PTA: 0.5-1-2-4 kHz), 7 of17 (PTA: 0.5-1-2-3 kHz), 9 of 17 (PTA: 0.5-1-2 kHz) and 15 of 17 (SRT: Speech recognitionthreshold...
Book Chapter
Series: Advances in Oto-Rhino-Laryngology
Volume: 65
Published: 22 January 2007
10.1159/000098794
EISBN: 978-3-318-01343-6
... Teflon piston was used. The pre- and postoperative bone conductionthresholds were compared at the frequencies 250Hz, 500 Hz, 1 kHz, 1.5 kHz, 2 kHz, 3 kHzand 4 kHz. The postoperative bone conduction between 250 Hz and 3 kHz was significantlybetter in the total stapedectomy group than in the stapedotomy...
Book Chapter
Series: Advances in Oto-Rhino-Laryngology
Volume: 67
Published: 25 November 2009
10.1159/000262593
EISBN: 978-3-8055-9287-1
..., ganglion cells and dendrites were preserved in the apical region. In the mid-frequency region, around 1 kHz, the organ of Corti with inner and outer hair cells was often conserved while in the lower basal turn, representing frequencies above 3 kHz, the organ of Corti was atrophic and replaced by thin cells...
Book Chapter
Series: Advances in Oto-Rhino-Laryngology
Volume: 65
Published: 22 January 2007
10.1159/000098756
EISBN: 978-3-318-01343-6
... (preoperatively, at the end of surgery, and 5 and 30days after surgery). Changes in the hearing thresholds and in the DPOAE amplitudes werecompared. Preoperative tests showed conductive hearing loss, with a mean air-bone gap of36.6 dB HL ranging from 0.25 to 1 kHz, and no stapedial reflexes were detected...
Book Chapter
Series: Frontiers of Neurology and Neuroscience
Volume: 21
Published: 27 March 2006
10.1159/000092396
EISBN: 978-3-318-01284-2
... for diagnostic frequencies (>1 MHz). This ratio nearly reverses in the kiloHertzrange (>500 kHz). Ultrasound insonation is efficient for accelerating enzymatic thrombolysiswithin a wide range of intensities, from 0.5W/cm2 (MI ∼0.3) to several watts per squarecentimeter, particularly in the nonfocused...
Book Chapter
Series: Contributions to Nephrology
Volume: 164
Published: 05 May 2010
10.1159/000313727
EISBN: 978-3-8055-9417-2
.... Methods: Impedance (Z vector) is a combination of resistance, R (function of intra- and extracellular fluid volume) and reactance, Xc (function of the dielectric material of tissue cells), with the best signal to noise ratio at 50 kHz. BIVA allows a direct assessment of body fluid volume through patterns...
Book Chapter
Series: Advances in Oto-Rhino-Laryngology
Volume: 69
Published: 07 July 2010
10.1159/000318524
EISBN: 978-3-8055-9471-4
... to approximately 10 kHz for better speech comprehension and music appreciation Risk of feedback is reduced Unrestricted usage while working (e. g. in a dusty or hot environment), telephoning, showering, sleeping, swimming, and exercising Auditory rehabilitation is possible without any demand...
Book Chapter
Series: Progress in Neurological Surgery
Volume: 29
Published: 09 September 2015
10.1159/000434669
EISBN: 978-3-318-02809-6
.... Traditional peripheral neuromodulation techniques use standard stimulation parameters and work by stimulation of nerve tissues which are then felt by the patient as a tingling sensation or paresthesia. Recently introduced high-frequency (10 kHz) electrical nerve block [HFAC (high-frequency alternating current...
Book Chapter
Series: Contributions to Nephrology
Volume: 163
Published: 15 June 2009
10.1159/000223772
EISBN: 978-3-8055-9203-1
... to modify our pharmacological and dialysis policy. We used a Fresenius Body Composition Monitor, a whole-body bioimpedance spectroscopy (50 frequencies, 5–1,000 kHz ), to assess the body composition of 97 patients on peritoneal dialysis in our center. The patients were subjected to a physical examination...
Book Chapter
Series: Advances in Oto-Rhino-Laryngology
Volume: 65
Published: 22 January 2007
10.1159/000098843
EISBN: 978-3-318-01343-6
... to evaluate a widening of the internal acoustic canal. Repeated audiometrycould show especially a large conductive impairment in the lowest frequencies with a closureof the airbone gap at 2 khz and a high sensorineural high frequency loss at 4 and 8 khz.Contralateral stapedial reflexes may be present. Since...
Book Chapter
Series: Frontiers of Neurology and Neuroscience
Volume: 21
Published: 27 March 2006
10.1159/000092388
EISBN: 978-3-318-01284-2
...-15 MHz linear probes. Thepulse repetition frequency should be about 2.5 kHz. Color box steering and beam steeringshould be maximal. It is essential that the color covers the artery lumen exactly. Sensitivitiesand specificities with regard to clinical diagnosis and histology are high. Large-vessel...
Book Chapter
Series: Frontiers of Neurology and Neuroscience
Volume: 21
Published: 27 March 2006
10.1159/000092397
EISBN: 978-3-318-01284-2
... that low intensity (≤2W/cm2) US safely enhanced thrombolytic drug activitywithin a wide range of frequencies (0.04-3.4 MHz). In humans, transcranial sonothrombolysiswith mid-kHz frequencies showed an unacceptably high rate of intracranial bleeding,while the use of 2MHz yielded promising results...
Book Chapter
Series: Contributions to Nephrology
Volume: 149
Published: 10 May 2005
10.1159/000085478
EISBN: 978-3-318-01222-4
... component of cell membranes andorganelles, and tissue interfaces. Measurements at 50 kHz current frequency are done withthe best signal to noise ratio. Results: Cyclical tissue hydration changes in hemodialysispatients are detectable as changes in the whole body impedance, which can be utilized withpatterns...
Book Chapter
Series: Advances in Oto-Rhino-Laryngology
Volume: 81
Published: 07 May 2018
10.1159/000485545
EISBN: 978-3-318-06315-8
... the inner ear fluids [ 3 , 4 ]. This is the pressure (NOT energy) gain of the middle ear, and based on the area ratios of the TM and oval window, is about 20:1, which is about 26 dB. The middle ear approaches this level of gain in the lower frequencies below 2 kHz [ 5 ], when the TM and middle ear...
Book Chapter
Series: Developments in Ophthalmology
Volume: 56
Published: 21 March 2016
10.1159/000442770
EISBN: 978-3-318-05830-7
... ratio of flow detection [ 15 ]. As shown by an example from en face angiograms of the macular retinal circulation collected using a commercial 70 kHz, 840-nm wavelength spectral OCT device (fig. 1 ), SSADA provides a clean and continuous microvascular network and less noise just inside the foveal...
Book Chapter
Book: Cornea
Series: ESASO Course Series
Volume: 6
Published: 11 August 2015
10.1159/000381491
EISBN: 978-3-318-05453-8
... to 1,000 kHz), pulse duration, energy delivered per single pulse, bubble spatial separation, geometrical construction and distribution of spots in order to create a resection, type of laser contact with the corneal surface (patient docking: applanation or curved interface), and type of corneal resections...
Book
Book Cover Image
Series: Advances in Oto-Rhino-Laryngology
Volume: 69
Published: 07 July 2010
10.1159/isbn.978-3-8055-9471-4
EISBN: 978-3-8055-9471-4
Book Chapter
Series: Progress in Neurological Surgery
Volume: 35
Published: 18 December 2020
EISBN: 978-3-318-06795-8
... at frequencies to 10 kHz for the treatment of craniofacial pain. Neuromodulation 2020;23:e49. ...