The application of supravascular laser irradiation of blood for the treatment of cochleovestibular disorders.
A total of 165 patients presenting with neurosensory impairement of hearing and Meniere’s disease were treated by supravascular (extracorporeal) laser irradiation of blood. The study undertaken to evaluate the efficacy of this treatment confirmed its beneficial effect in patients with acute hearing disorders. It was equally effective as regards elimination of labyrinthine hydropsis in patients presenting with Meniere’s disease. The method proved less efficacious for the management of long-standing hearing impairement and chronic loss of hearing, but it can be used to prevent the development of these conditions.
Photomed Laser Surg. 2008 Aug;26(4):349-53.
Efficacy of low-level laser therapy in Ménière’s disease: a pilot study of 10 patients.
Teggi R, Bellini C, Fabiano B, Bussi M.
Ear, Nose, and Throat Department, IRRCS San Raffaele Hospital, Vita-Salute University, Milan, Italy. email@example.com
OBJECTIVE: To assess the efficacy of low-level laser therapy (LLLT) for Ménière’s disease (MD). MATERIALS AND METHODS: Twenty patients with unilateral MD were included in the study; all presented with uncontrolled vertigo. The patients were randomly divided into two groups: group 1 patients received LLLT 20 min a day with a 5-mW soft laser for 6 mo, while group 2 received betahistine 16 mg twice a day for 6 mo. According to American Academy of Otolaryngology-Head and Neck Surgery (AAO-HNS) guidelines, the main outcome for vertigo control was considered to be the number of spells per month in the 6 mo before treatment compared with the same parameter in the 6 mo of therapy. The duration of spells expressed in minutes was also considered. Moreover, a hearing test was performed before and after therapy and results were reported as the pure tone average of 500-, 1000-, 2000-, and 3000-Hz frequencies. All results were valued at baseline, and after 3 and 6 mo of therapy. RESULTS: Compared to baseline, the number and duration of spells were significantly reduced in both groups; statistical significance was detected for the 3-mo control in both groups (p 0.05 with the multiple pair comparison test). Betahistine seems to have a faster action in spell reduction (p 0.05 comparing the 3-mo results between the two groups). Audiometric examination did not show a statistically significant difference between the two groups. CONCLUSIONS: In our experience, LLLT seems to prevent vertigo spells in MD, although results indicate that it has a slower action than betahistine. Dose-dependent therapeutic effects could explain the last result. In our opinion, increased blood flow in the inner ear is the main mechanism leading to the therapeutic results.
Lasers in Surgery and Medicine. April 16-18, 1999. Supplement 11, 1999.
Report on more than eight years of low level laser therapy in chronic inner ear diseases.
Lutz Wilden, Sabine Schübel, Germany.
The IXX Annual Meeting of The American Society for Laser Medicine and Surgery, Lake Buena Vista, Florida.
348 patients (402 ears) were treated with low level laser. Most patients had tinnitus. This study, however, only reports on the objective outcome of the audiometry, taken before and after therapy. The hearing capacity of the patients was improved in all frequency sectors (average value = 20.6%). The best db-reductions were obtained in the low frequencty sector (11.7 db) and in the high frequency sector (14.6 db). There was a close correlation between the improvement of the hearing capacity and the age of the patients and the duration of their disease. In conclusion it can be stated that if LLLT is administered in sufficiently high dosages to the inner ear (cochlea), it is possible to obtain and document significant biostimulative effects.
ON THE EFFECTIVENESS OF LOW LEVEL LASER LIGHT (LLLL) IN THE INNER EAR
Reproduced here through the kind permission of Dr. Lutz Wilden
(db = decibel; j = joule; kc = kilocycle; nm = nanometer)
A) The objective of the study was the documentation of the biostimulative effects of LLLL in high energetical dosages (measured in j) by audiometry changes of a statistically relevant number of patients. B) The energy was transmitted with 3 laser diodes with a wave length of 830 nm and 3 diodes with a wave length of 635 nm; it was administered via meatus and mastoid. The examination and therapy included 348 patients and 215 right and 187 left inner ear organs (cochlea). 171 organs were female, 231 were male. Their average age at the beginning of the therapy was 56.9 years; the average duration of their disease was 5.9 years. 97.3 % suffered from tinnitus. The examination started on 24 june 1996 and ended on 9 february 1999. The average treatment phase lasted 61.5 days. The average duration of the therapy was 11.8 hours; the average quantity of the transmitted energy was 6732 j. Before every therapy series with LLLL the patients actual hearing capacity (air and bone conductions) was examined by audiometry. At the end of each therapy series their hearing capacity was examined by the same method for a second time. The statistical analysis consisted of the arithmetical evaluation of a mean value of all test data over 12 frequencies as far as air and bone conductions were concerned, the drawing up of frequency intervals (low = 0.125, 0.25, 0.5 and 0.75 kc, middle = 1, 1.5, 2 and 3 kc, and high = 4, 6, 8 and 12 kc) and the grouping of the patients according to age, duration of the disease, quantity of the transmitted energy and the relative total reduction of the necessary sound volume in db. In cases of deafness 125 db were used as an auxiliary numeric value. C) The hearing capacity of the patients was ameliorated in all frequency sectors (average value = 20.6 %). The best db-reductions were obtained in the low frequency sector (9.3 db) and in the high frequency sector (11.2 db). There was a close (and biologically plausible) correlation as far as the amelioration of the hearing capacity and the age of the patients and the duration of their disease were concerned; this correlation was the higher, the more energy was transfered on the whole. D) If LLLL is administered in sufficiently high dosages to the inner ear (cochlea), it is possible to obtain and document medicinically significant biostimulative effects.
The audiometry belongs to the diagnostical standard equipment of medical offices and acousticians and is universally being used as a basic diagnostic by trade operative associations and industrial medicine for the purpose of examinations and appraisements. This is why it seemed approriate to use this method, which is both economical and easy on the patient, to verify the biostimulative effects of LLLL on the inner ear.
At present, a therapy that ameliorates the biological qualitiy of the sensory cells of the cochlea and thus increases the hearing capacity is being cold-shouldered by the overwhelming majority of physicians.Although the manifold clinical and experimental studies of the international low level laser literature3)4) and the penetration capacity of LLLL into the inner ear 5), so far there was no statistical inquiry about the therapy with high dosages of LLLL, which is backed up by a sufficient amount of audiometrical data and takes into account a statistically relevant number of patients respectively inner ear organs include examinations of the therapy of inner ear diseases
Material and methods
|The energy was transmitted by 3 laser diodes with a wave length of 830 nm und 3 diodes with a wave length of 635 nm; it was administered via meatus and mastoid. The statistical analysis consisted of the arithmetical evaluation of a mean value of all audiometrical data over 12 frequencies as far as air and bone conductions were concerned, the drawing up of frequency intervals (low = 0.125, 0.25, 0.5 and 0.75 kc, middle = 1, 1.5, 2 and 3 kc, and high = 4, 6, 8 and 12 kc and the grouping of the patients according to age, duration of the disease, quantity of the transmitted energy and the relative total reduction of the necessary sound volume in db. In cases of deafness 125 db were used as an auxiliary numeric value.|
|In the case of the initial audiometrical results (pretherapeutical findings) the evaluation of the mean value of all readings reveals a clearly reduced average course of the hearing curves of the air and bone conductions over all frequencies, with low points in the frequency sector around 6 kc and the frequency sector around 12 kc (sensorineural hardness of hearing, oblique descension).As expected, the bone conduction is situated above the air conduction in all frequencies. Occasional intersections of the air and bone conductions are only to be found in the frequency sector between 6 and 8 kc; this phenomenon, which is known from individual audiometries and can be observed on the mean curve, is due to an increasing loss of the differentiation capacity of the cochleas sensory cells within the range of higher-grade biological quality reductions of the organ of Corti.
In the case of the final audiometrical results (posttherapeutical findings) the evaluation of the mean value of all readings reveals a clearly and symmetrically ameliorated average course of the hearing curves of the air and bone conductions over all frequencies as compared with the pretherapeutical course (amelioration of the sensorineural hardness of hearing with a reduction of the oblique descension). As expected, the bone conduction is once again situated above the air conduction in all frequencies; the intersection phenomena in the frequency sector between 6 and 8 kc show a downward tendency.
|The diagram of the average total reduction (db) of the air and bone conductions shows a significant amelioration of the hearing capacity in the low and high frequency sector and a more pronounced amelioration of the air conduction as compared with the bone conduction in the lower frequency sector.
Clinically, this can be interpreted to the effect that, apart from its general therapeutical value, the LLLL also exerts a positive influence on the widespread sound conduction disturbances in this frequency sector, which are indicated by degenerative changes of the middle ear (for instance, otosclerotic processes.)
The highest reduction is to be found in the low frequency sector (9.3 db when there are 0.25 kc in the air conduction; 6.4 db when there are 0.124 kc in the bone conduction) and in the high frequency sector (10.9 db when there are 12 kc in the air conduction; 11.2 db when there are 12 kc in the bone conduction).
|The comparison of all pre- and posttherapeutical readings over all frequencies reveals statistically highly significant results in the case of the air and bone conductions.The values of the air conduction, which are slightly higher as those of the bone conduction, indicate that the LLLL has additional positive therapeutical effects on the sound conducting structures of the middle ear.|
|The grouping of the readings according to age groups and 3 frequency intervals results in findings that are biologically plausible as far as both the air and the bone conductions is concerned. In other words, the patient group with the highest average age (72.4 years) finds itself in the most disadvantageous starting position; the patient group with the lowest average age (37.9 years) finds itself in the most advantageous starting position.This applies to all 3 frequency intervals. The data also show that – in spite of the respective starting position – all age groups profit from the biostimulative effects of the LLLL in a relatively equal way. This holds good for both the air and the bone conduction.
If one takes into consideration the energy quantity (j) transmitted in order to reach these results, it is obvious that the eldest age group needs the largest quantity of transfered energy. However, this seems to be biologically plausible as well.
|As to the grouping of the readings according to the duration of the disease and 3 frequency intervals, the patient group with the shortest duration of the disease (0.6 years) has the best initial values and obtains the best final results with the smallest quantity of transfered energy. The patient group with the longest duration of the disease (14.5 years) has the poorest initial values and furthermore needs the largest quantity of transfered energy. This holds good for both the air and the bone conduction over all frequencies. At the same time, a detailed analysis of the data reveals that – in spite of the respective duration of the disease – all patient groups profit from the biostimulative effects of the LLLL in a relatively equal way. It has to be emphasized, though, that once again the most difficult patient group (average duration of the disease 14.5 years) needed the largest quantity of transfered energy.|
|The grouping of the readings according to energy quantities reveals a clear correlation between the total quantity of the transfered energy and the therapeutical results that were obtained. The larger the quantitity of transfered energy, the higher the db-reductions that could be observed. This applies to both the air and the bone conduction in all 3 frequency intervals.|
Fig. 6b clearly shows the correlative (parallel) connection between the total quantity of transfered energy and the total reduction.
|Even if expressed in percentages, the mean values of the respective groupings demonstrate that the smallest amount of transfered energy (6188 j) results in the lowest relative reduction (5.4 %), whereas the largest quantitity of transfered energy (9007 j) brings about the highest relative reaction (46.4 %).The highest correlation coefficient of 0.91 (relative total reduction in relation to total quantity of transfered energy) thus confirms the observations implied by the foregoing groupings according to age, duration of the disease and total quantity of transfered energy.
In the whole course of the therapy no side effects whatsoever could be observed.
In some of the cases, however, the LLLT of the inner ear organ presented in this paper caused specific individual reactions such as temporary vertigo respectively the disappearance of an existing otogenic vertigo, the momentary appearance respectively disappearance of a sensation of pressure in the ear and changes respectively the reduction or disappearance of a prevailing dysacusia and/or tinnitus, which had to be interpreted correctly with regard to the patient.
If LLLL is transmitted to the inner ear (cochlea) in sufficiently high dosages, it is possible to obtain and document medicinically significant biostimulative effects.
In this respect, the results of the study at hand not only refer to the fundamental working model of the cellular energy transfer6) from 1998, which was based on quantum mechanics, but confirm its conclusions as well, namely, that cellular regeneration processes do take place, if the mitochondria in question are stimulated to an increased production of adenosine triphosphate (ATP) by sufficiently large quantities of LLLL.
To what extent subsequent LLLTs lead to additional organic betterments (on average > than 20.6 %) is left up to future studies. The same applies for an augmentation of the total quantity of the transfered energy in the course of the treatment phases or per unit; in the latter case further technological developements on the part of the laser industry are indispensable, though.
1. – Ärzte Zeitung (1997). 22, pp. 17
2. – Gebhard Reiss, Wolfgang Walkowiak, Hans-Peter Zenner, Karl Plinkert and Ernst Lehnhardt (1989). Das stato-akustische Organ. Ein Bildatlas zur Evolution, Physiologie und Morphologie. Hannover: Duphar Parma
3. – W. Seipp, D. Haina, V. Justen and W. Waidelich (1978). Laserstrahlen in der Dermatologie. Der Deutsche Dermatologe. 11: pp. 557-575
– D. Haina, R. Brunner, M. Landthaler, W. Waidelich and O. Braun-Falco (1981). Simulierung der Wundheilung mit Laserlicht ñ Klinische und tierexperimentelle Unter-suchungen. Der Hautarzt. 32: Supplementum V
– Michael Landthaler, Diether Haina, Wilhelm Waidelich and Otto Braun-Falco (1981). Therapeutische Laser-anwendungen in der Dermatologie. Der Hautarzt. 32: pp. 450-454
– M. Landthaler, D. Haina and W. Waidelich (1983). Behandlung von Zoster, postzosterischen Schmerzen und Herpes simplex recidivans in loco mit Laser-Licht. Fortschritt der Medizin. 22: pp. 1039-1041
– Peter Schneede, Wolfgang Jelkmann, Uda Schramm, Harald Fricke, Manfred Steinmetz and Alfons Hofstetter (1988). Effects of the Helium – Neon Laser on Rat Kidney Ephitelial Cells in Culture. Lasers in Medical Science. 3: pp. 249-257
– J. Kert and L. Rose (1989). Cinical Laser Therapy, Low Level Laser Therapy. D”nemark: Veksoe
– Pekka J. Pöntinen (1992). Low Level Laser Therapy as a medical treatment modality. A manual for Physicians, Dentists, Physiotherapists and Veterinary Surgeons. Tampere: Art Upo Ltd.
– D. Baxter (1994). Therapeutic Lasers. Edinburg: Churchill Livingstone
– G. Ambronn, R. Muxeneder and U. Warnke (1995). Laser- und Magnetfeldtherapie in der Tiermedizin. Jena/Stuttgart: Gustav Fischer Verlag
– Pekka J. Pöntinen and R. Pothmann(1998). Laser in der Akupunktur. Grundlagen, Indikation und Technik für die Akupunktur – Schwerpunktpraxis. Stuttgart: Hyppocrates Verlag
– Tiina Karu (1998). The Science of Low-Power Laser Therapy. Amsterdam: Gordon and Breach Science Publishers
– 2 nd Congress World Association for Laser Therapy (1998), September 2-5. Abstracts. Kansas City: University of Kansas Medical Center
– Jan TunÈr and Lars Hode (1999). Low Level Laser Therapy. Clinical Practice and Scientific Background. Gr”ngesberg: Prima Books
4.- Y. Shiomi, H. Takahashi, I. Honjo, H. Kojima, Y. Naito and N. Fujiki (1995). Efficacy of transmeatal low power laser irridiation on tinnitus: a preliminary report. Auris Nasus Larynx. 24: pp. 39-42
– L. Wilden and D. Dindinger (1996). Treatment of chronic complex diseases of the inner ear with Low Level Laser Therapy. Laser Therapy. 8 (3)
– Lutz Wilden and Michaela Fritsch (1997). Tinnitus lindern durch Laserlicht. Wiesbaden: Dr. Werner Jopp Verlag
5.- Wolfgang Beyer, Reinhold Baumgartner and Stefan Tauber (1997). Dosinetric analysis for low-level-lasertherapy (LLLT) of the human inner ear at 593nm and 633nm. Munich: Forschungsbericht der Ludwig-Maximilians-Universität
6.- Lutz Wilden and Rainer Karthein (1998). Import of Radiation Phenomena of Electrons and Therapeutic Low-Level Laser in Regard to the Mitochondrial Energy Transfer. Journal of Clinical Laser in Medicine and Surgery. 16 (3), pp. 159-165
Low-energy laser radiation in the combined treatment of sensorineural hearing loss and Meniere’s disease.
[Article in Russian]
Pal’chun VT, Lapchenko AS, Kadymova MI, Kucherov AG.
59 patients with neurosensory hypoacusis and 45 with Meniere’s disease underwent helium-neon laser intra- or supravascular radiation of blood. The treatment proved effective in acute neurosensory hypoacusis and Meniere’s disease. In chronic neurosensory hypoacusis the effect was insignificant.
Comprehensive therapy of patients suffering from tinnitus.
Prochazka M, Tejnska R.
37 patients suffering from tinnitus (age 18-86 years) were treated in three ways: 1. Rehabilitation: mobilisation, physical training, physiotherapy. 2. Same as 1 but with placebo laser added. 3. Same as 1 but with functional laser added. Laser used was 830 nm 300 mW. 2-3 treatments per week were given, total 10 treatments. Treatment protocol: 90 J/cm2 CW on mastoideus, 45 J/cm2 5 Hz on mastoideus, 50 J/cm2 CW on acoustic duct, 25 J/cm2 5 Hz on acoustic duct. Tebokan Egb 761 ginko medication was added to treatment. Results were classified as no effect/less than 50% relief/more than 50% relief/no more tinnitus. The percentwise outcome for the three groups was: 1. 29.4/44.1/17.6/8.9 2. 25.8/48.4/25.8/0 3. 19.4/19.4/35.5/25.8
Auris Nasus Larynx. 1997; 24 (1): 39-42.
Promising results using LLLT for tinnitus and inner ear diseases.
Shiomi et al. used a 40 mW GaAlAs laser in a group of 38 patients suffering from tinnitus, resistant to several medical therapies for more than six months. 21.6 J was given each time through the auditory meatus toward the cochlea. Ten treatments or more were given. Only 26% of the patients reported improved duration, but 58% had reductiont of loudness and 55% reduced annoyance. The authors conclude: ”Laser therapy seemed to be worth trying on patients with intractable tinnitus”. Editorial note: The results can be improved if much higher doses are given. Dr. Lutz Wilden of Bad Füssing, Germany reported on his 6 years of experience at a recent lecture before the members of the Swedish Laser Medical Society (Stockholm, May 1998). Dr. Wilden is using three different lasers. One is directed through the meatus, two are positioned over the mastoid. Total dosage 2000-4000 (sic) joules per treatment (60 minutes per session, 30 minutes per ear). Doses may seem very high, but the thick bone behind the ear absorbs about 95% of the energy before reaching the inner ear. For more info, see http://home.t-online.de/gbl-hc/ez.
TINNITUS AND VERTIGO – A CASE FOR THE DENTIST?
Jan Tunér DDS Grängesberg, Sweden. E-mail: firstname.lastname@example.org
The correlation between tinnitus/vertigo and cranomandibular disorders (CMD) has been known for quite some time, yet few dentists seem to be aware of this. It is not natural for the dentist to ask, nor for the patient to inform the dentist about such a situation since it does not appear to be a dental indication. However, quite a number of tinnitus/vertigo patients will be releived of their symptoms if a proper CMD treatment is performed. Low level lasers have been used to treat tinnitus patients with reasonable success, if sufficient energy and suitable treatment technique is used. These lasers have also proved themselves successful in the treatment of CMD. It is obvious, therefore, that low level laser therapy is an appropriate treatment modality for the yet undefined subgroup of tinnitus/vertigo patients with a CMD background. Laser therapy will reduce pain levels, ease muscular spasms and revert the vicious circle. In some cases laser therapy alone will produce astonishing results, in others it has to be combined with traditional occlusal stabilisation procedures. It is important for doctors to be aware of this subgroup of tinnitus patients since traditional therapies, and even laser therapy of the inner ears, will be ineffective if the CMD is not diagnosed and treated. This presentation will look at the literature documentation for laser therapy of tinnitus/vertigo.
Light dosimetry and preliminary clinical results for low level laser therapy in cochlear dysfunction.
Light dosimetry and preliminary clinical results for low level laser therapy in cochlear dysfunction.
Beyer W et al.
The light distribution inside the cochlear windings produced by irradiation of the tympanic membrane was quantitatively measured ex vivo for wavelengths of 593, 612, 635, 690, 780 and 805 nm by means of video dosimetry. The transmission of light across the tympanic cavity and the promontory depends strongly on the wavelength. Spatial intensity variations of a factor of 10 and more inside the cochlear windings have been measured. The clinical study was performed with 30 patients suffering from chronic permanent tinnitus. 5 irradiations within 2 weeks each with a space irradiation of 4J/cm2 were applied at the cochlear position to be treated. Diode lasers of 635 or 830 nm, 15 patients each, were used. During and after irradiation there was no significant change of hearing. However, 40% of the patients reported a slight to significant attenuation of the tinnitus loudness of the treated ear. There was no difference between the two wavelength groups. A double blind controlled study is in preparation.
Otology & neurotology 2002; 23 (3): 296-300.
Transmeatal low-power laser irradiation for tinnitus.
Nakashima T, Ueda H, Misawa H et al.
To evaluate effectiveness of 60mW laser irradiation in the treatment of tinnitus. Prospective, randomised double-blind study. This investigation included 68 ears in 45 patients with disabling unilateral or bilateral tinnitus. The active or placebo laser treatment was administered trans-meatally once a week for 6 minutes. Laser irradiation was performed four times during a 4-week period. A questionnaire was administered to evaluate the loudness, duration, quality, and annoyance of tinnitus before and after irradiation. The loudness and pitch match for tinnitus were obtained, and distortion product otoacoustic emissions were also examined.: No significant difference was observed between the active and placebo laser groups with regard to outcome of loudness, duration, quality, and annoyance of tinnitus. In one patient who received active laser treatment, acute hearing deterioration occurred after the third irradiation. Transmeatal low-power laser irradiation with 60 mW is not effective for the treatment of tinnitus.
Transmeatal cochlear laser (TCL) treatment of cochlear dysfunction: a feasibility study for chronic tinnitus.
Tauber S, Schorn K, Beyer W, Baumgartner R.
Department of Otolaryngology, Head and Neck Surgery, Ludwig-Maximilians-University of Munich, D-81377 Munich, FRG. email@example.com
Low-level-laser-therapy (LLLT) targeting the inner ear has been discussed as a therapeutic procedure for cochlear dysfunction such as chronic cochlear tinnitus or sensorineural hearing loss. Former studies demonstrate dose-dependent biological and physiological effects of LLLT such as enhanced recovery of peripheral nerve injuries, which could be of therapeutic interest in cochlear dysfunction. To date, in patients with chronic tinnitus mastoidal and transmeatal irradiation has been performed without systematic dosimetric assessment. However, light-dosimetric studies on human temporal bones demonstrated that controlled application of laserlight to the human cochlea depends on defined radiator position within the external auditory meatus. This feasibility study first presents a laser application system enabling dose-controlled transmeatal cochlear laser-irradiation (TCL), as well as preliminary clinical results in patients with chronic cochlear tinnitus. The novel laser TCL-system, consisting of four diode lasers (lambda=635 nm-830 nm) and a new specific head-set applicator, was developed on the basis of dosimetric data from a former light-dosimetric study. In a preliminary clinical study, the TCL-system was applied to 35 patients with chronic tinnitus and sensorineural hearing loss. The chronic symptoms persisted after standard therapeutic procedures for at least six months, while retrocochlear or middle-ear pathologies have been ruled out. The patients were randomised and received five single diode laser treatments (lambda=635 nm, 7.8 mW cw, n=17 and lambda=830 nm, 20 mW cw, n=18) with a space irradiation of 4 J/cm2 site of maximal cochlear injury. For evaluation of laser-induced effects complete otolaryngologic examinations with audiometry, tinnitus masking and matching, and a tinnitus-self-assessment were performed before, during and after the laser-irradiation. The first clinical use of the TCL-system has been well tolerated without side-effects and produced no observable damage to the external, middle or inner ear. Changes of tinnitus loudness and tinnitus matching have been described. After a follow-up period of six months tinnitus loudness was attenuated in 13 of 35 irradiated patients, while two of 35 patients reported their tinnitus as totally absent. Hearing threshold levels and middle ear function remained unchanged. Further investigations by large double-blind placebo-controlled studies are mandatory for clinical evaluation of the presented TCL-system and its therapeutic effectiveness in acute and chronic cochlear dysfunction.
Used by the kind permission of the Czech Society for the Use of Laser in Medicine, www.laserpartner.org
The Role of LLLT in Treatment of Tinnitus
Laser Partner, 26.2.2002
Miroslav Prochazka, M.D.
Head doctor of the Jarov Private Rehab Clinic, Prague, CZ
Comprehensive laser rehabilitation therapy of tinnitus has proven successfull and beneficial for treatment of this widespread civilization disease. Its long-term results are convincing, bringing significant relief to 36 per cent of patients and even leaving remarkable 26 per cent of patients without any symptoms (see Miroslav Prochazka, Ales Hahn: Comprehensive Laser Rehabilitation Therapy of Tinnitus: Long-Term Double Blind Study on a Group of 200 Patients in 3 Years, Laser Partner No. 51/2002). With the results mentioned above we can really speak about a breakthrough. This study brings an additional overview of the role of LLLT (Low Level Laser Therapy) in the treatment. Our results enable us to pinpoint laser as the leading element in the overall therapy of tinnitus.
Tinnitus is an auditory perception apearing without an objective sonic source from the outer environment. Tinnitus can be subjective (heard only by the patient) and objective (sound can be even heard also by others). Our study, however, deals with patients suffering from subjective tinnitus only. According to literature, fifteen per cent of entire population have experienced at least a tinitus episode some time, its incidence and severity rising with age up to approx. eighty-five per cent of population older than 60.
Our clinic has been treating tinnitus for more than 5 years. We have published three studies on this particular issue, and we are of the opinion that our results are being followed in several countries (Brasil, Cyprus, Sweden, Switzerland, Slovakia, Turkey, Japan, Germany etc.) and implemented in numerous clinics with significant results. Studies published by these clinics show results which are almost identical with our experience.
Our last study on a group of 200 patients in the course of three years was finalized in February 2002 and published in June 2002. Since there have always been efforts to evaluate an exact role of LLLT in treatment of tinnitus, apart from medication and physiotherapeutic manipulation of neck vertebra as an integral part of the comprehensive therapy, we have decided to create a separate group of patients to be treated only with laser. This was only possible thanks to our vast experience and long involvement in tinnitus treatments.
Materials and methods
Our group consisted of 72 patients, 49 males, 23 females, age ranging between 16 to 92 years. The age and sex is given in Table 1.
Prior to the application of LLLT, all the patients underwent the following pre-therapy examination:
1. Anamnesis (aimed especially at the fact whether tinnitus was caused by an acoustic trauma, as well as at genetic predisposition)
2. Subjective evaluation of suffering
3. Clinical examination (otoneurology, axial skeleton, nystagm, blood pressure)
4. Technical examination (audiogram, x-ray of neck vertebra, ENG, tinnitometry)
5. Laboratory testing
Audiograms were taken in all the patients prior to the therapy. After the therapy audiograms were taken in 62.5 per cent, i. e. 45 patients, showing a slight improvement. Audiogram provides only for numeric range of perception of frequency of sounds, however it does not give us an objective evaluation of quality of hearing. Furthermore, the patients do not see the main improvement in a wider range of frequency of sounds, this remains usually on a similar level, but the main benefit is the absence of the additional burdening sound caused by tinnitus. Therefore the patients can better analyze sounds in general, their hearing is “refreshed” as they usually describe the result of the therapy.
Typical audiograms of patients with tinnitus before and after therapy shown on Picture 1.
MAESTRO/CCM device (manufactured by MediCom, Prague) was used for the study, with an infrared laser probe (830 nm) and power output 300 mW. The following application dosages and frequency modulations were applied on the following points:
1. meatus acusticus externus – in the direction of the axis of the auditory duct – continuous beam 50 J/cm2 followed by 25 J/cm2, frequency modulation of 5 Hz (Picture 2),
2. processus mastoideus – directed on the center, the vector of the beam in the direction of counter-lateral orbit, continuous beam 90 J/cm2 , followed by 45 J/cm2 with 5 Hz pulse frequency (Picture 3).
We strictly appeal to maintain the direction of the vector of aiming the beam – in fact the target structure of the helix is a shape of several square milimeters.
At the beginning, attendance was scheduled to 10 procedures in total, twice a week. Having completed the first series, patients returned after 2 – 3 months for another two series, each consisting of 5 – 6 therapies, once a week.
Level of subjective complaints was evaluated according to three scales:
In order to simplify the effect of therapy as much as possible the results were divided in four groups:
This evaluation is identical with our previous study, and it enabled us to compare easily the results of both studies.
The results obtained are shown in Table 2.
It was interesting to compare our latest results (LLLT only) with those of our previous studies, i. e. our study made in 1998, long-term study between 1999 – 2001, and the initial study aimed at LLLT only. Comparison is contained in Table 3.
Hippocratic Oath orders us to treat patients to the best of our knowledge and ability. Since our long-term experience in comprehensive treatment of tinnitus has been based on the triad of physiotherapeutic manipulation, medication, and LLLT, we were at a loss whether we would not harm our patients in a way, giving them only a part of the treatrment, mere LLLT. We have to declare, that we have selected patients during the introductory examination, sorting out patients whose x-ray indicated a possibility of tinnitus caused by vertebral blockades. On the other hand, this selection led to a more pure evaluation of the role of LLLT in the treatment of tinnitus, leaving out both a possible cause and a corresponding treatment.
We have been positively surprised that in general the ratio of individual four groups remained similar. The number of patients with no effect of LLLT slightly increased (by 4.8 per cent when compared to the long-term study, by 1.4 per cent in comparison to the original study of 1998). This is obviously caused by the absence of medication and physiotherapy, showing their supportive efect.
In the group evaluating improvement as less than 50 per cent the leading role of LLLT can be evidenced best. More than one-fourth of all patients (26.4) report improvement after therapy performed with LLLT only, which is a result better than those in both previous studies (19.4 and 15.0) .
Impressive results have also been obtained in the last two groups , when we imagine more than one half of all patients reporting significant and/or total relief of tinnitus (30.6 + 22.2 = 52.8 per cent).
22.2 per cent patients suffering from tinnitus never more after treatment with therapeutic laser is a great success of LLLT. It only confirms the leading role of LLLT within comprehensive laser rehabilitation therapy of tinnitus. On the other hand we must stress the necessity to apply the two remaining parts of our therapeutic triad as well, since medication and physiotherapeutic manipulation are integral parts of the general care of our patients, and we should not deprive the suffering of the means and methods capable of bringing them more relief, which we are aware of.
Literature and references