What do windsurfers and kitesurfers in Germany know about surfer's ear and how is it influenced by protective measures?

OBJECTIVE: This study investigated the frequency of ear canal protection use and looked at its influence on external auditory exostosis severity and knowledge about external auditory exostosis among windsurfers and kitesurfers on the German coast. METHOD: This retrospective cross-sectional study interviewed 130 windsurfers and kitesurfers along the German coast on knowledge of external auditory exostosis, exposure time, use of neoprene hoods and earplugs, and otological complaints. Participants underwent bilateral video-otoscopic examination. RESULTS: Knowledge of external auditory exostosis was 'good' or 'excellent' in 78 of 130 (60 per cent) individuals and 'poor' or non-existent in 52 of 130 (40 per cent) individuals. Knowledge was positively correlated with hours of exposure, otological complaints and frequency of ear canal protection use. A significant negative influence of neoprene hood use on external auditory exostosis severity was shown. CONCLUSION: The positive effect of external auditory exostosis knowledge on the frequency of ear canal protection and the reduction of external auditory exostosis risk implies a need for health education on this topic.

[Laser Doppler vibrometric measurements on human temporal bones]. / Laser-Doppler-vibrometrische Messungen an humanen Felsenbeinen.

Laser Doppler vibrometric (LDV) measurements on human temporal bones represent the standard method for predicting the performance of active middle ear implants (AMEI) and are used as preclinical tests in the development, approval process, and indication expansion of AMEI. The quality of the coupling of the floating mass transducer to the mobile structures of the middle ear is decisive for the performance of the implant and patients' hearing perception. The cochlea can be stimulated via the oval window (forward stimulation) or the round window (reverse stimulation). For forward stimulation, the ASTM standard F2504-05 defines a method to ensure physiologically normal properties of the temporal bones used in the experiments. For reverse stimulation, which depends even more critically on the quality of the temporal bone, a comparable standard method is lacking. Appropriate preparation and storage of the human petrous bone as well as suitable LDV test setups with respect to calibration and reproducibility of measuring positions and angles provide results that allow a comparison of different types of coupling and also correlate well with clinical data.

[Evaluation of standardized questionnaires for diagnosis and differentiation of obstructive and patulous Eustachian tube dysfunction]. / Untersuchung standardisierter Anamnesefragebögen zur Diagnostik und Differenzierung von obstruktiven und klaffenden Tubenfunktionsstörungen.

BACKGROUND: Patulous Eustachian tube (ET) dysfunction can impair quality of life (QOL) due to autophony, pressure sensation, and an altered impression of sound. In cases of nonspecific complaints the diagnosis of patulous ET can be difficult, and its distinction from chronic obstructive ET dysfunction is particularly challenging. Since there is currently a lack of standardized diagnostic and therapeutic options, a structured diagnostic workup is essential for accurate diagnosis of this condition. The Eustachian Tube Dysfunction Patient Questionnaire (ETDQ-7) was established by McCoul et al. in 2012 for investigating chronic obstructive ET dysfunction. The Patulous Eustachian Tube Handicap Inventory-10 (PHI-10) was published by Kobayashi et al. in 2017 as an instrument to evaluate patulous ET. PATIENTS AND METHODS: The PHI-10 questionnaire was translated into German and validated in a total of 83 patients (41 healthy subjects, 13 patients with tinnitus, 11 patients with patulous ET, and 18 patients with chronic obstructive ET dysfunction). In addition, the PHI-10 (German) was compared to ETDQ­7. RESULTS: The results of the English version of the PHI-10 questionnaire could be confirmed using the German version. The German version of the PHI-10 and the results of the PHI-10 and ETDQ­7 for each group of patients are presented. The ETDQ­7 leads to false-positive results in patients with patulous ET and the PHI-10 generates false-positive results in patients with chronic obstructive ET dysfunction. Both questionnaires result in false-positive results in patients with tinnitus. CONCLUSION: The PHI-10 and ETDQ­7 (German) can be recommended as an additional tool for preoperative assessment of ET dysfunction. However, they insufficiently discriminate between patulous and obstructive ET dysfunction and are not suitable for patients with tinnitus. The strength of the two questionnaires lies in their suitability for use in monitoring therapeutic success during follow-up.

Osmoregulation of thirst and vasopressin during normal menstrual cycle.

Changes in osmoregulation during normal menstrual cycle were examined in 15 healthy women. In 10 women, studied repetitively during two consecutive menstrual cycles, basal plasma osmolality, sodium, and urea decreased by 4 mosmol/kg, 2 meq/l, and 0.5 mM, respectively (all P less than 0.02) from the follicular to luteal phase. Plasma vasopressin, protein, hematocrit, mean arterial pressure, and body weight did not change. In five other women, diluting capacity and osmotic control of thirst and vasopressin release were assessed in follicular, ovulatory, and luteal phases. Responses of thirst and/or plasma vasopressin, urine osmolality, osmolal and free water clearance to water loading, and infusion of hypertonic saline were normal and similar in the three phases. However, the plasma osmolality at which plasma vasopressin and urine osmolality were maximally suppressed as well as calculated osmotic thresholds for thirst and vasopressin release were lower by 5 mosmol/kg in the luteal than in the follicular phase. This lowering of osmotic thresholds for thirst and vasopressin release, which occurs in the luteal phase, is qualitatively similar to that observed in pregnancy and should be taken into account when studying water balance and regulation of vasopressin secretion in healthy cycling women.

Treatment of psychosis, intermittent hyponatremia, and polydipsia (PIP syndrome) using lithium and phenytoin.

Six patients [5 men and 1 woman, mean age 37.3 +/- 8.2 (SD) years] with psychosis, intermittent hyponatremia, and polydipsia (PIP syndrome) underwent a sequence of treatments in an effort to normalize basal serum sodium levels and thereby protect the patients against complications, including hyponatremic seizures and coma. The morning baseline group mean basal serum sodium value was 132.5 +/- 3.8 meq/liter. Over a 20-month period, the sequence of treatments was salt-added diet, lithium and phenytoin, and lithium alone. Each treatment program yielded morning group mean basal serum sodium determinations superior to baseline values, except for the program of lithium alone, which could not be tolerated. The combination of lithium and phenytoin provided a morning group mean basal serum sodium level of 140.6 +/- 3.2 meq/liter, which was superior (p less than 0.01) to all other treatment modalities. Early morning hyposthenuria persisted throughout the 20-month period of observation.