Abstract:
:To elucidate the effects of CO2 in the middle ear upon the cochlea, measurements were made of the cochlear potentials (compound action potential and endocochlear potential) and of the pH of the inner ear fluids and the organ of Corti. Gas containing CO2 did not affect the AP threshold, except for a slight decrease in AP threshold elicited by an 8 kHz tone burst with 10% CO2 flow. The EP did not vary with CO2 gas. The CO2 gas mixture reduced the pH in perilymph significantly, by 0.11 +/- 0.05 with 5% CO2 and by 0.17 +/- 0.04 with 10% CO2, in comparison with 100% N2. The CO2 gas slightly but significantly decreased the endolymph pH, by 0.05 +/- 0.04 with 5% CO2 and by 0.09 +/- 0.06 with 10% CO2. The removal of perilymph led to a greater acidification of endolymph with CO2 gas. Acidification of the organ of Corti was also noted with the CO2 gas flush. These findings indicate that CO2 in the middle ear influences the acid-base regulation of inner ear fluids and the cochlear function.
journal_name
Acta Otolaryngoljournal_title
Acta oto-laryngologicaauthors
Ikeda K,Morizono Tdoi
10.3109/00016488909107397subject
Has Abstractpub_date
1989-07-01 00:00:00pages
88-93issue
1-2eissn
0001-6489issn
1651-2251journal_volume
108pub_type
杂志文章abstract:CONCLUSIONS:This is the first report of mandibular reconstruction using the retroauricular (RA) or the modified face-lift (MFL) approach in head and neck cancer. This approach may have advantages over the conventional approach, especially in its superior aesthetic results. OBJECTIVE:The fibular osseous or osteocutaneo...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489.2014.986757
更新日期:2015-05-01 00:00:00
abstract::The correlation between allergen-induced specific and non-specific (histamine) nasal reactions was studied, especially as regards topical glucocorticosteroid effects on the non-specific reactions. Thirteen patients with strictly seasonal allergic rhinitis participated. A nasal challenge with histamine and three increa...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016488909127508
更新日期:1989-03-01 00:00:00
abstract::Fifteen normal speakers (7 women and 8 men), ranging in age from 21 to 35 years, were examined consecutively with rigid telescopy and flexible fiberscopy during sustained phonation at 3 loudness levels. The endoscopes were connected to a stroboscope and video equipment. The purpose was to investigate whether the two l...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489209100796
更新日期:1992-01-01 00:00:00
abstract::The penetration of oral erythromycin stearate (Abboticin), administered in a dosage of 500 mg three times a day, into the maxillary sinus mucosa and secretion was studied in 15 patients (22 sinuses) operated on for chronic maxillary sinusitis. The average concentration in serum was 2.3 microgram/ml, 1.2 microgram/ml i...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016487709123970
更新日期:1977-09-01 00:00:00
abstract::The present study on the anatomy of the human facial nerve is based on the results of a series of gross dissections, and histological and electro-diagnostic examinations. From our findings it follows that there is a definite spatial orientation of the peripheral branches in the facial nerve trunk. The results of the m...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016487609119946
更新日期:1976-03-01 00:00:00
abstract:CONCLUSION:Systemic application of human mesenchymal stem cells (hMSCs) may be another effective tool for stem cell supply to the inner ear. OBJECTIVES:Most researchers have used local application to provide the inner ear with stem cells. In spite of their efficacy, these methods can potentially cause irreversible dam...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489.2012.660731
更新日期:2012-06-01 00:00:00
abstract:CONCLUSIONS:In computer-assisted analysis of acinic cell cancer (ACC) morphological characteristics of CD34 immunoreactivity were detected. Bigger vessel size, vessel irregularity, and lower intensity of CD34-positive vessel staining may indicate unfavorable prognosis. OBJECTIVES:Salivary gland cancer (SGC) is a morph...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016480601053099
更新日期:2007-08-01 00:00:00
abstract::Glyconjugate expression in formalin-fixed, paraffin-embedded Sjögren's syndrome labial glands (nine cases) was compared with that in normal glands (12 samples) using a wide panel of lectins. Mucous cells expressed mainly mucous-type glycoproteins including sialyl, fucosyl, galactosyl and galactosaminosyl residues, and...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489709114217
更新日期:1997-11-01 00:00:00
abstract:CONCLUSION:Selected patients with Meniere's disease (MD) show an improvement of disability from vertigo after transtympanic ventilation tube insertion, although an effect on vestibular function is not seen if ipsilateral middle ear pressure lower than -50 daPa is used as a selection criterion. OBJECTIVES:Transtympanic...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016480902791678
更新日期:2009-12-01 00:00:00
abstract:CONCLUSION:There are two modalities of dual electrode stimulation: a shifting, continuous excitation, which is the desired effect, and a split excitation with considerable variation in loudness. The first one most likely occurs in the basal turn, with adjacent contacts, stimulated simultaneously rather than sequentiall...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016480802610218
更新日期:2009-04-01 00:00:00
abstract::In a previous communication, we demonstrated that the introduction of air into the scala tympani of the cochlea causes a decrease of cochlear potentials; however, the change in endocochlear dc potential (EP) was mild and the decreased cochlear microphonics (CM) and compound action potentials (CAP) were, at least parti...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489309135892
更新日期:1993-11-01 00:00:00
abstract:CONCLUSION:The visual outcomes of endoscopic treatment of optic neuropathy are favorable. However, no specific prognostic factor was associated with good outcome. OBJECTIVE:To investigate visual outcomes of patients with optic neuropathy caused by paranasal mucocele or sinusitis. METHODS:The clinical course in 38 pat...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489.2011.557837
更新日期:2011-08-01 00:00:00
abstract::The author has proved experimentally (in two dogs) that there is reflex hypertonia of the tensor palati muscle, synchronous with the 'shortening' reaction of the tensor tympani muscle in response to its "static" relaxation during the gradual passive inward displacement of the drum resulting from the negative intratymp...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016487609120926
更新日期:1976-11-01 00:00:00
abstract::We have recorded auditory evoked potentials, of both neurogenic and myogenic origin, in cats having neonatal high frequency cochlear hearing loss. Using frequency specific stimuli (tone pips) and by measuring responses near to threshold, we have probed tonotopic (or cochleotopic) representation within the brainstem-mi...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489309135763
更新日期:1993-01-01 00:00:00
abstract::A family with early-onset vestibulopathy is presented. The 34-year-old father had experienced brief attacks of vertigo and currently suffers from unsteadiness and oscillopsia during head movements. His two young sons also experience brief attacks of spontaneous vertigo. In vestibular testing all three subjects showed ...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016480310002500
更新日期:2003-08-01 00:00:00
abstract:CONCLUSION:A very low dose of dexamethasone (DEX) was as equally as sufficient as a pharmacological dose to decrease eosinophil inflammation in airways and bone marrow. The timing of DEX treatment in relation to allergen challenge was strongly decisive for the outcome of the inflammatory response. OBJECTIVES:We aimed ...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016480802126561
更新日期:2009-02-01 00:00:00
abstract::Intracellular calcium concentrations ([Ca2+]i) in type I cochlear spiral ganglion cells (SGCs) of the guinea pig were measured by digital imaging microscopy and the Ca(2+)-sensitive dye Fura-2. Extracellular ATP induced elevation of [Ca2+]i in type I SGCs in a concentration-dependent manner. The ATP-induced elevation ...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489709113435
更新日期:1997-07-01 00:00:00
abstract:CONCLUSION:GABA-mediated inhibition is responsible for the duration tuning in the inferior colliculus (IC) of guinea pigs, a non-echo-locating mammal. Duration tuning in this species is better demonstrated in an appropriate short time window. OBJECTIVES:To investigate the role of GABA-mediated inhibition in duration t...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016480701840122
更新日期:2008-10-01 00:00:00
abstract::The present paper investigates the hearing function in chronic otitis media vs. tympanoplasty in 41 patients with bilateral chronic otitis media, operated on unilaterally. The auditory evaluation was performed immediately before surgery and at a follow-up time varying from 1 to 14 years (mean = 5 years). Results were ...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489109138410
更新日期:1991-01-01 00:00:00
abstract:CONCLUSIONS:We conclude that: (1) among several cues examined, the monaural cue of direct-to-reverberant (D/R) ratio in the ipsilateral ear provides the most information about sound-source distance; (2) interaural level difference (ILD) provides less information about sound-source distance; and (3) a comprehensive theo...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016480701840114
更新日期:2008-04-01 00:00:00
abstract:CONCLUSION:Vasomotor symptoms (VMS) and especially hot flushes are negatively associated with recovery from menopause-related dizziness. A further study is justified to determine whether hormone replacement therapy (HRT) can shorten this recovery time. OBJECTIVES:This study aimed to compare the rate of recovery from d...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489.2013.841991
更新日期:2014-02-01 00:00:00
abstract:CONCLUSION:This study described objective and subjective evaluations of the Nurotron® Venus™ Cochlear Implant System and indicated that this system produced a satisfactory performance. OBJECTIVE:To observe the performance of the Nurotron® Venus™ cochlear implant (CI) system via electrophysiological and psychophysical ...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489.2015.1086022
更新日期:2016-01-01 00:00:00
abstract::We previously reported that long-term exposure to glutamate (Glu) induced death of cochlear outer hair cells (OHCs). However, the mechanisms of OHC death induced by Glu were unclear. In the central nervous system, Glu is known to interfere with a cystine-Glu antiporter, leading to a decrease in cystine uptake and redu...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016489950180612
更新日期:1999-01-01 00:00:00
abstract::Transitory hearing impairment has been well documented in humans during basilar migraine attacks. Ischemia induced by activation of central nervous system adrenoreceptors by cAMP is one of the mechanisms that has been implicated, as well as calcium metabolism alterations. Propranolol-HCl has proven to be an effective ...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489109137383
更新日期:1991-01-01 00:00:00
abstract:CONCLUSION:This study provides evidence that histamine induced MUC5AC mRNA expression through the activation of the core region of its promoter. It may also help in approaching new therapeutic strategies in airway mucins hypersecretory diseases. OBJECTIVE:Mucin hypersecretion characterizes several respiratory diseases...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489.2015.1017890
更新日期:2015-07-01 00:00:00
abstract:CONCLUSIONS:The present study revealed that miR-21 promotes the proliferation and invasion of cholesteatoma keratinocytes. These results provide a partial explanation for the more aggressive clinical behavior observed in cholesteatoma. OBJECTIVE:This study aims to investigate the post-transcriptional regulatory effect...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016489.2016.1202447
更新日期:2016-12-01 00:00:00
abstract:CONCLUSION:Younger children tend to harbor more resistant strains because they are exposed to these pathogens more often through contacts with siblings or attendance at day-care centers and are frequently treated with antibiotics. The high prevalence of BLNAR strains should be taken into account in the treatment of AOM...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016480410020301
更新日期:2005-02-01 00:00:00
abstract::Three hundred and fifty-four patients with squamous cell carcinoma of the oral cavity, oropharynx, supraglottic larynx, hypopharynx or maxillary sinus have been randomized for preoperative radiation therapy and surgery versus surgery and postoperative radiation therapy plus, in the case of patients with lesions of the...
journal_title:Acta oto-laryngologica
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.3109/00016488109138548
更新日期:1981-05-01 00:00:00
abstract:CONCLUSION:Cone Beam Computed Tomography (CBCT) can be widely used in imaging of bony structures of the anterior and lateral skull base. Significant differences of applied dosages result from the different protocols of the various indications. OBJECTIVES:CBCT is increasingly being used in head and neck imaging. Until ...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489.2015.1076172
更新日期:2015-01-01 00:00:00
abstract::The microsphere method was used to measure the inner ear blood flow in albino rabbits before and during artificial ventilation with 5% CO2 in air. An increase in blood flow resulted in both the cochlear and the vestibular parts of the inner ear. ...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016488709134692
更新日期:1987-01-01 00:00:00