Please assess the completion status of the following clinical trial:

Trial Title: Cochlear Implantation for Treatment of Single-sided Deafness

Study Design Characteristics:
- Allocation: None
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion Criteria:~* 18 years of age or older with the ability to provide informed consent~* English as the primary language~* Medically and psychologically suitable~* Willing to receive/have received meningitis vaccinations~* Able to pay for all care received through the study, either through the subject's insurance company or through self-pay~* Able to comply with study requirements, including travel to the investigational sites~* Severe to profound sensorineural hearing loss (≥70 dB HL (decibel hearing level) thresholds between 500 and 4000 Hz) in the worse ear with ≤ 20% Consonant-Nucleus-Consonant (CNC) word scores~* Duration of single-sided deafness ≥ one year~* Tinnitus localized to the affected ear, both ears, or in the head localized to the affected ear, both ears, or in the head~  * Expected subjects include those with:~* Unilateral hearing loss secondary to viral or bacterial infection, such as meningitis or labyrinthitis~* Ménière's disease~* Sudden sensorineural hearing loss~* Vascular disease affecting the inner ear~* A combination of any number of the above conditions~Exclusion Criteria:~* Duration of single-sided deafness ≥ ten years~* Pure tone thresholds ≥ 35 dB HL at 500, 1000, 2000, and 4000 Hz in the better ear~* Consonant-Nucleus-Consonant (CNC) word scores ≤ 70% in the better ear~* Chronic otitis media in either ear~* Inner ear malformation in either ear~* Autoimmune inner ear disease (fluctuation sensorineural hearing loss in either ear)~* Evidence of retrocochlear pathology, including vestibular schwannoma~* Unilateral tinnitus in the unaffected ear~* Cochlear ossification~* Demonstrated cognitive and/or developmental challenges~* Major depression or anxiety; post-traumatic stress disorder; substance abuse~* Medical or psychological conditions that serve as contraindication to surgery~* Additional handicaps that would prevent or limit participation in evaluations~* Unrealistic patient or family expectations regarding the benefits, risks, and limitations inherent to the procedure and the prosthetic device~* Pregnant women: The investigators will specifically ask all women of childbearing age if there is a possibility they are pregnant or trying to become pregnant at the initial clinic visit; any women who are pregnant or actively trying to become pregnant will be excluded. In cases that are questionable on the day of planned surgery, a pregnancy test will be performed as per current Massachusetts Eye \& Ear Infirmary anesthesia pre-operative protocols.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Cochlear Implant surgery (Type: EXPERIMENTAL): All subjects will be part of a single arm involving placement of the Med-El MAESTRO Cochlear Implant with Flex 28 electrode array

Based on this trial design, predict the completion outcome and termination type (if applicable).

Answer: outcome: terminate
termination_type: regulatory/approval