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This study aimed to investigate the diagnostic value of wideband acoustic absorbance testing in otitis media with effusion.
This prospective study compared middle-ear wideband acoustic absorbance rates in three paediatric patient groups: a healthy group of 34 volunteers; 48 patients diagnosed with otitis media with effusion; and 28 patients with chronic effusion but no sign of effusion during myringotomy. The diagnostic value of absorbance testing was analysed with the receiver operating characteristic test.
The wideband acoustic absorbance rate was significantly lower in the otitis media with effusion group than in both the otitis media and healthy groups at the 0.375–2 kHz averaged mean absorbance (p < 0.017 and p < 0.001, respectively). Receiver operating characteristic analysis showed the highest diagnostic value for the 0.375–2 kHz averaged mean (area under the curve 0.984), followed by those at 1 and 1.5 kHz (area under the curve: 0.973 and 0.967, respectively).
The wideband acoustic absorbance test is more accurate for detecting middle-ear effusion compared with conventional 226-Hz tympanometry. Its practicality and objectivity suggest that the wideband acoustic absorbance test may be a better alternative for diagnosing otitis media with effusion.
The use of endoscopic techniques is becoming more widespread in otological and neuro-otological surgery. One such procedure, endoscopic tympanoplasty, is used in chronic otitis media treatment. This study aimed to analyse the results of endoscopic transcanal cartilage tympanoplasty.
Data of tubotympanic chronic otitis media patients who underwent transcanal endoscopic type I cartilage tympanoplasty between June 2012 and May 2013 were analysed. The main outcome measures were graft success and hearing improvement.
Graft success rates were 94.3 per cent and 92.5 per cent at post-operative months one and six, respectively. Post-operative air–bone gap values were significantly improved over pre-operative values (p < 0.01).
Transcanal endoscopic type I cartilage tympanoplasty is a minimally invasive, effective and reliable surgical treatment option for chronic otitis media.
In this study the cases occurred due to a direct effect of trauma and trauma-induced complications that might needed medical care and intervention in the field after the first 5 days of disaster were investigated. The cases in the field were determined by field screening and individual medical and surgical interventions have been conducted. The wounded that cannot be treated in the field were taken to the field hospital by the only available emergency ambulance, owned by Turkish Health Teams, to be treated by specialists. In the conclusion of the paper, the necessity and effectiveness of interventions provided to sick/wounded persons in the field who couldn't reach hospital was discussed.
The purpose of this study was to examine the effects of intravenous dexmedetomidine on the duration of bupivacaine-induced epidural anaesthesia and level of wakefulness and the respective side-effects.
Sixty ASA I–II patients were included in the study. Consecutive patients were allocated to groups according to the last digit (odd/even) of their admission numbers. All patients had epidural anaesthesia with bupivacaine 0.5% performed by the same experienced anaesthesiologist. In the first group, the patients were administered intravenous dexmedetomidine infusion just after the epidural block and continued during the operation, while those in the second group were administered physiologic saline infusion at the same amount and duration.
The recovery time of sensory block was significantly longer in the first group. The bispectral index values were lower in the first group than in the second. Also, heart rate was significantly lower in Group I than in Group II. Regarding side-effects, shivering was significantly less frequent in the first group, whereas there was a significant increase in the requirement of atropine in the first group as dexmedetomidine caused bradycardia.
Intravenous administration of dexmedetomidine prolonged the duration of epidural anaesthesia, provided sedation and had few side-effects.
The forward current-voltage (I-V) characteristics of
Au/n-GaAs Schottky barrier diodes (SBDs) have been studied over a wide
temperature range (80–300 K). The barrier height inhomogeneities by assuming
a Gaussian distribution of barrier heights at the interface were observed.
The evaluation of the experimental I-V data reveals a non-linear increase of
the zero-bias barrier height (
). To remove the spatial
inhomogeneity of the barrier height based on small regions or patches and to
increase the barrier height compared to the reference sample Au/n-GaAs, the
front surface of the n-type GaAs semiconductor has been oxidized by the
anodic oxidation method and metal/insulating/semiconductor (MIS) Au/n-GaAs
SBDs have been formed. The ln(
) versus 1/T and
T plots of the MIS have exhibited the linear behavior in the temperature
range of 80–300 K. Thus, the I-V data of the MIS diodes have obeyed the
interfacial layer model due to the interfacial layer and it has been
concluded that the inhomogeneity of the barrier height can be disappeared by
a formed interfacial layer at the metal and semiconductor interface.