O Tjernström

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With the aid of a quantitative impedance method and a pressure chamber, the capacity of the Eustachian tube to equilibrate pressure differences across the tympanic membrane was repeatedly determined in 20 otologically healthy men. The test-retest reliability was calculated from five determinations of static pressure equilibration of over- and underpressures(More)
Eustachian tube function was studied with the impedance technique and a pressure chamber in 58 children, aged 3-12 years, and 61 adults, aged 17-73 years, all otologically healthy. The pressure opening and closing functions were measured, i.e. the relative overpressure in the middle ear required to force open the tube, and the residual overpressure in the(More)
The Eustachian tube function of 52 applicants accepted for flight training had earlier been comprehensively tested during simulated flights in a pressure chamber in the sitting position. Despite the fact that all were otologically healthy, the wide range of pressure-equilibrating capacity in the sitting position was even more pronounced when they were(More)
Treatment efficacy, oto- and nephrotoxicity, and aminoglycoside pharmacokinetics were evaluated in a prospective, comparative, randomized clinical study of aminoglycosides given once a day or three times a day for severe infections. Sixty patients were treated with netilmicin or gentamicin 4.5 mg/kg bodyweight/day, either once a day or divided into three(More)
The most common cause of barotitis is pressure changes during descent in aviation. Equilibration is normally achieved by swallowing, jaw movements, yawning, or chewing, but some have to perform a Valsalva maneuver several times during descent and even by these means some fail. The aim of the study was to estimate the point prevalence of barotrauma in(More)
OBJECTIVES To elucidate the effects of hypobaric pressure on cochlear hydrodynamics in patents with well-defined Meniere's disease. DESIGN Sixteen patients were consecutively selected. Elevated hearing threshold levels and pathological transtympanal electrocochleography (tt-ECOG) were confirmed at the day of trial. The patients were exposed to repeated(More)
This paper addresses the "fluid shift theory" of space motion sickness. The primary purpose of our research was the development of procedures to assess individual differences in response to rostral body fluid shifts on earth. Experiment I examined inner ear fluid pressure changes during head-down tilt in intact human beings. Tilt produced reliable changes.(More)
This report presents a case where an open safety pin passed through the Esophagus and where Nature herself finally solved the problem by closing the pin, which was afterwards carried in the faecal stream and discharged from the body without any harm to the patient.
Different inflationary (e.g. Valsalva's) and deflationary (e.g. sniffing) manoeuvres were studied in 58 children and 61 adults, all otologically healthy, in order to evaluate qualitatively and quantitatively the pressure opening and closing functions of the Eustachian tube. Only 71% of the normal children could voluntarily increase the middle ear pressure(More)