Clinical trial NCT04881435: Hydrogen-oxygen Gas Mixture Inhalation in Patients With Sudden Sensorineural Hearing Loss
Official title: The Effect of Inhaled Hydrogen on the Prognosis of Idiopathic Sudden Sensorineural Hearing Loss
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: NA
Conditions: Hearing Loss, Sensorineural
Lead sponsor: Chang Gung Memorial Hospital
Sponsor class: OTHER
First posted: 2021-05-11
Enrollment: 100
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: Idiopathic sudden sensorineural hearing loss (ISSHL) is defined according to American Academy of Otolaryngology as a hearing loss of at least 30 decibel over 3 contiguous test frequencies occurring within a 72h period. It affects 5 to 20 people per 100,000 annually and is characterized by sudden-onset, generally unilateral, sensorineural hearing loss. Its cause is idiopathic in most of the patients; however, vascular disorders have been proposed as the final common pathway. Recent studies have reported that the impaired microvascular perfusion occurring during an ischemic event may be related to oxidative stress which may be synergistically responsible for endothelial damage, especially in terminal microvascular systems.

Hydrogen, which serves as a free radical scavenger and can reduce the strong oxidants, is found as a therapeutic gas in cochlea in recent studies. Both antioxidant and anti-inflammatory effects have been seen with hydrogen administration in animal models. Since cisplatinum toxicity and acoustic trauma both involve oxidative stress to the cochlea, hydrogen may prove useful in these conditions. The efficacy and safety of hydrogen inhalation are also proved in clinical studies.

Given the theories mentioned above, the purpose of our study is to use inhaled hydrogen as an adjuvant therapy for treating idiopathic sudden sensorineural hearing loss. The systemic inflammation status and oxidative stress will be monitored. Both subjective and objective efficacy after treatment will be assessed.


Eligibility criteria: Inclusion Criteria:

1. Meet the criteria of definition of sudden sensorineural hearing loss: hearing loss of 30 dB or more over at least three contiguous frequencies, over a period of 72 hours or less.
2. The event attacked within 14 days. -

Exclusion Criteria:

1. pregnancy or other vulnerable groups
2. specific etiologies of sudden sensorineural hearing loss
3. Diabetes mellitus patients -

Primary outcomes:
measure: hearing recovery
timeFrame: 1.before treatment 2. after treatment immediately 3.one month later after treatment
Secondary outcomes:
measure: the change of systemic inflammatory status and oxidative stress
timeFrame: 1.before treatment 2. after treatment immediately 3.one month later after treatment
Other outcomes:
Locations:
city: Kaohsiung
country: Taiwan
facility: Kaohsiung Chang Gung Memorial Hospital
Study officials:
affiliation: Chang Gung Memorial Hospital
name: Ching-Nung Wu, MD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Quaranta N, De Ceglie V, D'Elia A. Endothelial Dysfunction in Idiopathic Sudden Sensorineural Hearing Loss: A Review. Audiol Res. 2016 Jul 27;6(1):151. doi: 10.4081/audiores.2016.151. eCollection 2016 Apr 20.
citation: Gode S, Turhal G, Kaya I, Mavili HI, Kirazli T. Evaluation of Procalcitonin and hs-CRP Levels in Sudden Sensorineural Hearing Loss. J Int Adv Otol. 2018 Apr;14(1):44-47. doi: 10.5152/iao.2017.2780. Epub 2017 Jun 21.
citation: Capaccio P, Pignataro L, Gaini LM, Sigismund PE, Novembrino C, De Giuseppe R, Uva V, Tripodi A, Bamonti F. Unbalanced oxidative status in idiopathic sudden sensorineural hearing loss. Eur Arch Otorhinolaryngol. 2012 Feb;269(2):449-53. doi: 10.1007/s00405-011-1671-2. Epub 2011 Jun 26.
citation: Joachims HZ, Segal J, Golz A, Netzer A, Goldenberg D. Antioxidants in treatment of idiopathic sudden hearing loss. Otol Neurotol. 2003 Jul;24(4):572-5. doi: 10.1097/00129492-200307000-00007.