Úvod: Recentně narůstá klinický význam hodnocení čichových evokovaných potenciálů – olfactory event-related potentials (OERPs) a trigeminálních evokovaných potenciálů – trigeminal event-related potentials (TERPs) v diagnostice poruch čichu. Výhodou objektivní metody je, že OERPs jsou méně zkreslené než rutinně užívané psychofyzikální čichové testy. Klinický olfaktometr dává přesně definované čichové podněty potřebné k vyvolání OERPs a TERPs. Princip metody je založen na prezentaci odorantu pomocí speciálního zařízení v nosní dutině pacienta a registraci odpovědi mozku pomocí elektroencefalografie (EEG) na čichové a trigeminální podněty. U OERPs a TERPs hodnotíme latence a amplitudy jednotlivých peaků a intervalu N1–P2. Absence OERPs je silným prediktorem přítomnosti čichové dysfunkce. Cíl této studie: Podat první informaci o této v České republice unikátní metodě, demonstrovat OERPs a TERPs křivky u jednotlivých onemocnění spojených s poruchou čichu. Tyto výsledky budou dobrým základem pro další výzkumné projekty v oblasti poruch čichu. Metoda a materiál: V období 3/2021–6/2024 bylo do prospektivní studie zařazeno 187 subjektů (99 žen a 88 mužů). Pro měření jsme použili klinický olfaktometr OL 024 Burghart a 8kanálový EEG systém OL 026 Burghart. Výsledky: Předkládáme příkladové křivky OERPs a TERPs z jednolivých skupin zařazených subjektů: 1. skupina zařazených normosmických subjektů jsou zdraví participanti, subjekty s deviací nosního septa; 2. skupinu tvoří subjekty s chronickou rinosinusitidou s nosní polypózou; 3. skupina zahrnuje subjekty po prodělání covidu-19; 4. skupina zařazených jsou subjekty s neurodegenerativním onemocněním, s Parkinsonovou chorobou, s roztroušenou sklerózou; 5. skupina zahrnuje subjekty s tumory vedlejších nosních dutin, olfaktorní oblasti, hypofýzy; 6. skupina je tvořena subjekty s poruchou čichu, které byly indikovány k vyšetření z mediko-legálních důvodů; 7. skupinou jsou zařazené subjekty s poúrazovou ztráta čichu. Závěr: Jsou demonstrovány příkladové křivky OERPs a TERPs. Získaná data mohou být velmi dobře aplikována v budoucnu jako vnitřní vodítko pro naše další probíhající výzkumné studie čichu. Absence čichových evokovaných potenciálů je silným prediktorem přítomnosti čichové dysfunkce. Objektivní olfaktometrie se jeví jako metoda s narůstajícím potenciálem, a to hlavně u osob, které obtížně zvládají běžně dostupné psychofyzické testování čichu, u pacientů s neurodegenerativním onemocněním, a v oblasti lékařsko-pracovně-právní.
Introduction: The clinical importance of olfactory evoked potentials (OERPs) and trigeminal evoked potentials (TERPs) in the diagnosis of olfactory disorders has recently increased. The advantage of the objective method is that OERPs are less biased than routinely used psychophysical olfactory tests. The clinical olfactometer gives precisely defined olfactory stimuli needed to elicit OERPs and TERPs. The principle of the method is based on the presentation of an odorant by a special device in the patient‘s nasal cavity and the registration of the brain response by electroencephalography (EEG) to the olfactory and trigeminal stimuli. For OERPs and TERPs, we evaluate the latencies and amplitudes of individual peaks and the N1–P2 interval. The absence of OERPs is a strong predictor of the presence of olfactory dysfunction. Aim of this study: These data will be a good basis for further research projects in the field of olfactory disorders. Materials and methods: Between 3/2021 and 6/2024, 187 subjects (99 females and 88 males) were enrolled in a prospective study. A clinical olfactometer OL 024 Burghart and an 8-channel EEG system OL 026 Burghart were used for measurements. Results: We present sample OERPs and TERPs curves from single groups of enrolled subjects. The 1st group of normosmic subjects – healthy participants, subjects with a deviation of the nasal septum. The 2nd group consists of subjects with chronic rhinosinusitis with nasal polyposis. The 3rd group includes subjects after undergoing COVID-19. The 4th group of enrolees are subjects with neurodegenerative disease, Parkinson‘s disease, and multiple sclerosis. The 5th group includes subjects with tumors of the paranasal sinuses, olfactory region, and pituitary gland. The 6th group consists of subjects with olfactory disorders who were indicated for examination for medico-legal reasons. The 7th group consists of subjects with post-traumatic loss of smell. Conclusion: Sample OERPs and TERPs curves are demonstrated. The data obtained may very well be applied in the future as an internal guide for our other ongoing olfaction research studies. The absence of olfactory evoked potentials is a robust predictor of the presence of olfactory dysfunction. Objective olfactometry appears to be a method with increasing potential, especially in persons who have difficulty with commonly available psychophysical testing of the sense of smell, in patients with neurodegenerative disease, and in the medicolegal field.
- Klíčová slova
- čichové evokované potenciály, trigeminální evokované potenciály,
- MeSH
- evokované potenciály * MeSH
- lidé MeSH
- odoranty MeSH
- olfaktometrie * metody MeSH
- poruchy čichu diagnostické zobrazování MeSH
- prospektivní studie MeSH
- somatosenzorické evokované potenciály MeSH
- Check Tag
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- práce podpořená grantem MeSH
- Geografické názvy
- Česká republika MeSH
OBJECTIVES: Olfactory dysfunction (OD) is a common symptom associated with Covid-19. During the Covid-19 pandemic, the importance of psychophysical olfactory tests and electrophysiological olfactory assessment increased. The purpose of the study was to analyze the psychophysical olfactory tests and the post-covid curves of olfactory event-related potentials (OERPs) and trigeminal event-related potentials (TERPs). METHODS: The prospective study included 98 subjects (62 females / 36 males). The average age was 42 years (range 21-84 years). Group I (n = 77) contained participants who had been infected with Covid-19. They were enrolled in the study at least 1 year after Covid-19. Group II (n = 21) was the healthy normosmic control group. RESULTS: In Group I, the OERPs of 18% participants were absent. Patients in Group I were statistically more likely to have an absence of OERPs (p = 0.036) than subjects in Group II. We did not detect a statistical difference in amplitudes and latencies of the OERPs between Group I and Group II. In Group I, N1 latency of the TERPs was significantly longer (p = 0.002) than in Group II. The amplitude of the N1-P2 interval of the TERPs was significantly lower (p = 0.025) in Group I than in Group II. According to the psychophysical Sniffin stick identification test, hyposmia was detected in 39% in Group I versus 0% in the control Group II. CONCLUSION: OD is a common post-covid symptom. The presence of OERPs is a significant prognostic factor for olfactory function after Covid 19. We detected a lower percentage of absence of OERPs after Covid-19 compared to the previously published studies of post-viral OD and post-infectious OD. For TERPs, we detected a longer N1 latency and a lower amplitude for the N1-P2 interval after Covid-19. OERPs and TERPs can be considered valid biomarkers to evaluate the progress of post-covid OD.
- MeSH
- čich fyziologie MeSH
- COVID-19 * patofyziologie MeSH
- dospělí MeSH
- evokované potenciály * fyziologie MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladý dospělý MeSH
- nervus trigeminus patofyziologie virologie MeSH
- poruchy čichu * patofyziologie virologie etiologie diagnóza MeSH
- prospektivní studie MeSH
- SARS-CoV-2 * MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
INTRODUCTION: In recent years, the evaluation of potential events related to olfactory events (OERPs) and trigeminal events (TERPs) has become increasingly important in the diagnosis of olfactory disorders. This technique is increasingly used in basic research and clinical practice to evaluate people suffering from olfactory disorders. PURPOSE OF THE STUDY: In a pilot project of the first investigations of OERPs and TERPs in the Czech Republic, we analyse the event-related potentials of the data of normosmic participants. METHODS: In the prospective study, 21 normosmic participants were enrolled for a 2-year period (5/2021-5/2023). OERPs/TERPs were recorded at the scalp vertex (electrode Pz/Cz). Odourants 2-phenylethanol/CO2 were used to selectively activate Nervus olfactorius/ Nervus trigeminus. Brain responses to olfactory/trigeminal stimuli (EEG) were recorded in 21/18 normosmic subjects. RESULTS: In the statistical analysis of the olfactory interval N1-P2 (age, gender), we found no statistically significant differences. In the statistical analysis of the trigeminal interval N1-P2 (age, gender) we found statistically significant differences in amplitude by gender (male amplitudes were higher than female amplitudes, p = 0.006). CONCLUSION: Our pilot data can function very well as an internal guide for ongoing and future olfactory research studies. Evaluation of the presence of OERPs appears to be an important parameter for the evaluation of olfactory disorders. The absence of OERPs is a strong indicator of the presence of olfactory dysfunction.
- MeSH
- čich * fyziologie MeSH
- evokované potenciály fyziologie MeSH
- lidé MeSH
- pilotní projekty MeSH
- poruchy čichu * diagnóza MeSH
- prospektivní studie MeSH
- Check Tag
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- Geografické názvy
- Česká republika MeSH
Fabry disease (FD) is a lysosomal storage disorder caused by pathogenic mutations in the alpha-galactosidase A (AGALA) encoding gene region. This rare disease affects several organs including the cochlea-vestibular system. Tinnitus and sensorineural hearing loss (SNHL) are reported among otoneurological symptoms. Early and correct diagnosis of FD is important with a view to available therapy. The aim of the study was to screen for alpha-galactosidase deficiency in men with tinnitus/SNHL. A prospective multicentric study including consecutive patients with SNHL confirmed by tone audiometry or tinnitus evaluated (10/2016-8/2019). The diagnosis of AGALA deficiency was done by dry blood spot method using a threshold of 1.2 µmol/l/h. Only men aged 18-60 were included. 181 patients were subject to evaluation. SNHL was reported in 126 (70%) patients, 50 (28%) patients had unilateral, 76 (42%) patients had bilateral SNHL. Tinnitus was found in 161 (89%) patients, unilateral in 96 (53%) and bilateral in 65 (36%) patients. Suspected FD was not detected in any patient; alpha-galactosidase The AGALA values ranged 1.5-8.8 µmol/l/h, an average of 3.4 µmol/l/h. None of the 181 patients participating in the study had AGALA levels below the threshold 1.2 µmol/l/h. The occurrence of tinnitus and sensorineural hearing loss in men appears to be an irrelevant clinical sign for FD systematic screening.
BACKGROUND: Acute acoustic trauma (AAT) ranks, among others, as one common cause of inner ear function impairment, especially in terms of military personnel, who are at an increased exposure to impulse noises from firearms. AIM OF THIS STUDY: 1. We wanted to demonstrate whether early treatment of AAT means a higher chance for the patient to improve hearing after trauma. 2. We find the answer to the question of whether hyperbaric oxygen therapy (HBO2) has a positive effect in the treatment of AAT. METHODS: We retrospectively analyzed data for the period 2004-2019 in patients with AAT. We evaluated the therapeutic success of corticosteroids and HBO2 in a cohort of patients with AAT n = 108 patients/n = 141 affected ears. RESULTS: Hearing improvement after treatment was recorded in a total of 111 ears (79%). In terms of the data analysis we were able to ascertain, utilizing success of treatment versus timing: within 24 h following the onset of therapy in 56 (40%) ears-54 (96%) ears had improved; within seven days following the onset the therapy was used in 55 (39%) ears-41 (74%) ears had improved; after seven days the therapy started in 30 (21%) ears-16 (53%) ears had improved. Parameter latency of the beginning of the treatment of AAT was statistically significant (p = 0.001 and 0.017, respectively). The success of the medical protocols was apparent in both groups-group I (treated without HBO2): n = 61 ears, of which 50 (82%) improved, group II (treated with HBO2): n = 73 ears, of which 56 (77%) improved. Group II shows improvement at most frequencies (500-2000 Hz). The most serious sensorineural hearing loss after AAT was at a frequency of 6000 Hz. CONCLUSION: Analysis of our data shows that there is a statistically significant higher rate of improvement if AAT treatment was initiated within the first seven days after acoustic trauma. Early treatment of AAT leads to better treatment success. HBO2 is considered a rescue therapy for the treatment of AAT. According to our recommendation, it is desirable to start corticosteroid therapy immediately after acoustic trauma. If hearing does not improve during the first seven days of corticosteroid therapy, then HBO2 treatment should be initiated.
- MeSH
- hormony kůry nadledvin terapeutické užití MeSH
- hyperbarická oxygenace * MeSH
- lidé MeSH
- nedoslýchavost z hluku * farmakoterapie MeSH
- retrospektivní studie MeSH
- vojenský zdravotní systém * MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Česká republika MeSH
Úvod a cíl: Nejčastěji vestibulární schwannomy (VS) rostou velmi pomalu, pouze některé z nich rostou rychle. Observace může být vhodnou strategií u vybraných pacientů. Cílem práce je zhodnocení strategie "Wait and Scan". Soubor a metodika: V období 1999 - 2016 jsme diagnostikovali 86 pacientů s VS. 24 pacientů (28 %) bylo léčeno mikrochirurgicky, 33 pacientů (38 %) bylo léčeno Leksell Gamma Knife. Do protokolu "Wait and Scan" bylo zařazeno 29 pacientů (34 %). Z těchto 29 pacientů bylo 18, 10 mužů/8 žen, průměrný věk 57,4 let, dlouhodobě monitorováno (v průměru 6 let). Důvody pro observaci zahrnovaly velikost nádoru I. stadium (61 %), pokročilý věk (17 %), přání pacienta (17 %), špatný celkový zdravotní stav (5 %). Data byla vyhodnocena retrospektivně. Výsledky: Délka observace byla v rozmezí 2-17 roků, v průměru 6 let. 11 pacientů (61 %) bylo úspěšně sledováno bez nutnosti konverze na aktivní léčbu. 7 pacientů (39 %) v konečném důsledku vyžadovalo aktivní léčbu, 3x mikrochirurgii a 4x radiochirurgii, v průměrném intervalu 3,5 roku od stanovení diagnózy. 9 nádorů (50 %) nerostlo a 9 (50 %) jich zvětšilo svůj objem během observace (2 pacienti přesto dále observováni - z důvodu vysokého věku pacienta a přání pacientky). Průměrná meziroční míra růstu nádoru při ročním follow-up byla statisticky významně vyšší (p=0,01, resp. 0,05) ve skupině vyžadující konverzi na aktivní přístup než ve skupině observovaných. Významný růst nádoru byl pozorován do 5 let od jeho diagnostikování, pozdější růst VS nebyl zaznamenán. Závěr: Obervace VS je rozumnou strategií u pečlivě vybraných pacientů. Tempo růstu nádoru při ročním follow-up bylo silným prediktorem případné potřeby pro aktivní přístup k léčbě. Je důležité věnovat pozornost rychle rostoucím a progresivním VS, které je nutné včas identifikovat a případně je indikovat k aktivní léčbě.
Study objectives: Most vestibular schwannomas (VS) grow very slowly, only some of them grow rapidly. Observation is a strategy with selected patients. The aim is to evaluate strategy Wait and Scan. Patients and Methods: In the period 1999-2016, 86 patients with VS were diagnosed. There were 24 patients (28%) were treated surgically, 33 patients (38%) were treated with Leksell Gamma Knife. 29 patients (34%) were indicated for "Wait and Scan". Protocol. Of these 29 patients, 18 patients were monitored for a long time (follow-up period average of 6 years). Reasons for observations included tumour volume, stage I (61%), advanced age (17%), patient preference (17%), poor health condition (5%). Data on one-year monitored VS were evaluated retrospectively. Results: Observations period 2 - 17 years, 6 years in average. 11 patients (61%) were successfully observed without the need for conversion to active treatment, 7 patients (39%) ultimately required active treatment within a mean interval of 3.5 years since diagnosis. 9 tumours (50%) did not grow and 9 tumours (50%) increased their volumes during the observations (2 patients still observed - because of high age and the patient's wishes). The average year-on-year rate of tumor growth during the annual follow-up was significantly higher statistically (p=0.01 and 0.05) in the group requiring conversion to an active approach rather than in the group of observed patients. Significant tumour growth was observed up to 5 years after diagnosis, a later VS growth has not been reported. Conclusion: Observations of VS is a rational strategy for carefully selected patients. The growth rate of the tumour during the annual follow-up was a strong predictor of the potential need for a proactive approach to treatment. Attention should be paidto the identification of fast-growing and progressive VS, as these must be identified in time and possibly indicated them for active treatment.
- MeSH
- konzervativní terapie * MeSH
- lidé MeSH
- pozorné vyčkávání MeSH
- retrospektivní studie MeSH
- staging nádorů MeSH
- vestibulární schwannom * diagnóza patofyziologie terapie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- práce podpořená grantem MeSH
