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The Impact of Systematic Olfactory Training on Sleep Disorders and Neurological Function Recovery in Post-Stroke Patients: A Randomized Controlled Study

The Impact of Systematic Olfactory Training on Sleep Disorders and Neurological Function Recovery in Post-Stroke Patients: A Randomized Controlled Study

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ChiCTR
Registry ID
ChiCTR2600118134
Enrollment
Unknown
Registered
2026-02-02
Start date
2026-02-02
Completion date
Unknown
Last updated
2026-02-09

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Stroke

Interventions

Intervention Group:Participants will sequentially smell four essential oils, with each oil smelled for 10 seconds and a 10-second interval between scents.
Control Group:None

Sponsors

Yantai Yuhuangding Hospital
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 75 Years

Inclusion criteria

Inclusion criteria: 1.Aged 18-75 years; 2.Stroke diagnosis confirmed by computed tomography (CT) or magnetic resonance imaging (MRI); 3.National Institutes of Health Stroke Scale (NIHSS) score ranging from 5 to 15 (indicating moderate stroke severity); 4.Pittsburgh Sleep Quality Index (PSQI) global score of 8 or higher; 5.Insomnia Severity Index (ISI) total score of 15 or higher; 6.Provision of signed informed consent.

Exclusion criteria

Exclusion criteria: 1.Uncontrolled severe systemic diseases (e.g., Class III-IV heart failure, uncontrolled severe hypertension, severe chronic obstructive pulmonary disease, poorly controlled diabetes mellitus). 2.History of pre-existing sleep disorders prior to stroke, including diagnosed primary insomnia, restless legs syndrome, narcolepsy, rapid eye movement sleep behavior disorder, or sleep problems attributable to specific environmental factors or circadian rhythm disorders. 3.Pre-stroke history of neuropsychiatric conditions known to affect cognition or olfaction (e.g., Alzheimer's disease, Parkinson's disease, traumatic brain injury, schizophrenia, bipolar disorder), or current severe depression (Hamilton Depression Rating Scale-17 >= 24). 4.Current use of medications potentially affecting sleep (e.g., sedative-hypnotics, antipsychotics, corticosteroids) without possibility of discontinuation or adjustment. 5.History of olfactory dysfunction, chronic rhinitis, severe nasal septal deviation, or other nasal disorders affecting olfaction, or prior anosmia. 6.Severe aphasia or neglect impairing effective communication and cooperation. 7.Severe cardiac, pulmonary, hepatic, or renal insufficiency; history of malignancy or psychiatric disorders. 8.Known allergy to the odorants used in the study. 9.Recent upper respiratory tract infection (e.g., within 15 days prior to enrollment).

Design outcomes

Primary

MeasureTime frame
Subjective Sleep Quality;

Secondary

MeasureTime frame
Insomnia Severity;Daytime Functioning and Mood;Objective Sleep Parameters;

Countries

China

Contacts

Public ContactRen Chao

Yantai Yuhuangding Hospital

renchaotg@126.com+86 185 6380 2311

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 15, 2026