Ignite Creation Date:
2025-12-25 @ 4:53 AM
Ignite Modification Date:
2025-12-26 @ 3:54 AM
Study NCT ID:
NCT04703218
Status:
TERMINATED
Last Update Posted:
2025-07-25
First Post:
2021-01-07
Is NOT Gene Therapy:
False
Has Adverse Events:
False
Brief Title:
REEDUCATION OF OLFACTORY DISORDERS AFTER A CEREBRAL VASCULAR ACCIDENT IN ADULTS
Sponsor:
University Hospital, Caen
Organization:
Study Overview
Official Title:
REEDUCATION OF OLFACTORY DISORDERS AFTER A CEREBRAL VASCULAR ACCIDENT IN ADULTS
Status:
TERMINATED
Status Verified Date:
2025-07
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
lack of patients
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
RE-OLF
Brief Summary:
Study context:
The literature identifies more and more research revealing olfactory disorders, with a high frequency after an acquired brain injury. So far, studies have mainly focused on post-traumatic and post-infectious olfactory disorders of the upper airways. There is scarcer data available on the olfactory disorders occurring after stroke. A recent study found 43.6% of patients with a loss of olfactory function after a stroke (2). This type of disorder can have repercussions in everyday life and endanger people, not being able to smell a burning odor or gas fumes. In addition, patients frequently describe loss of pleasure associated with these olfactory disorders (3). Tests allowing the evaluation of these difficulties exist but remain little used in clinical routine (4). These psychophysical tests allow a quantitative analysis of the olfactory capacities of subjects through various measures such as the detection threshold (T SST sub-score), discrimination (D SST sub-score) or the identification of an odor. (SST sub-score I). Some studies have shown a reduction in olfactory disturbances following specific training. Thus, Hummel et al. proposed a self-stimulation protocol to patients whose olfactory dysfunction was due to various aetiologies (post-infectious, post-traumatic or idiopathic) (5). People were to smell 4 scents twice a day for 12 weeks. The results show an improvement in the olfaction of the patients, while no change was noted in the subjects who did not perform the training. Lehrer et al. obtained similar results in patients with head trauma (CT) after 3 months of training (6). However, no study has looked at the effect of specific olfaction training in post-stroke patients. The few data available in the literature suggest that these disorders are common after stroke.
Objectives :
We propose an open, randomized controlled study, comparing the SST score between the group of patients who received olfactory training and the group who received standard rehabilitation.
Material and methods :
In the treatment of post-stroke olfactory disorders, we will suggest to patients hospitalized in SSR or followed in consultation to participate in a controlled, randomized open study.
All included patients will be assessed using the SST and the modified ASOF quality of life questionnaire (7). After randomization, patients in the treatment group will benefit from a presentation of specific olfaction training. This training consists of smelling 4 scents twice a day using scent sticks, for 12 weeks. At the end of these 12 weeks, a post-protocol evaluation including the SST, the modified ASOF quality of life questionnaire and a measurement of any side effects related to training will be offered.
Hypothesis tested:
The aim of this work is to evaluate the effectiveness of a specific olfaction training protocol in patients with olfaction disorders following stroke.
The literature identifies more and more research revealing olfactory disorders, with a high frequency after an acquired brain injury. So far, studies have mainly focused on post-traumatic and post-infectious olfactory disorders of the upper airways. There is scarcer data available on the olfactory disorders occurring after stroke. A recent study found 43.6% of patients with a loss of olfactory function after a stroke (2). This type of disorder can have repercussions in everyday life and endanger people, not being able to smell a burning odor or gas fumes. In addition, patients frequently describe loss of pleasure associated with these olfactory disorders (3). Tests allowing the evaluation of these difficulties exist but remain little used in clinical routine (4). These psychophysical tests allow a quantitative analysis of the olfactory capacities of subjects through various measures such as the detection threshold (T SST sub-score), discrimination (D SST sub-score) or the identification of an odor. (SST sub-score I). Some studies have shown a reduction in olfactory disturbances following specific training. Thus, Hummel et al. proposed a self-stimulation protocol to patients whose olfactory dysfunction was due to various aetiologies (post-infectious, post-traumatic or idiopathic) (5). People were to smell 4 scents twice a day for 12 weeks. The results show an improvement in the olfaction of the patients, while no change was noted in the subjects who did not perform the training. Lehrer et al. obtained similar results in patients with head trauma (CT) after 3 months of training (6). However, no study has looked at the effect of specific olfaction training in post-stroke patients. The few data available in the literature suggest that these disorders are common after stroke.
Objectives :
We propose an open, randomized controlled study, comparing the SST score between the group of patients who received olfactory training and the group who received standard rehabilitation.
Material and methods :
In the treatment of post-stroke olfactory disorders, we will suggest to patients hospitalized in SSR or followed in consultation to participate in a controlled, randomized open study.
All included patients will be assessed using the SST and the modified ASOF quality of life questionnaire (7). After randomization, patients in the treatment group will benefit from a presentation of specific olfaction training. This training consists of smelling 4 scents twice a day using scent sticks, for 12 weeks. At the end of these 12 weeks, a post-protocol evaluation including the SST, the modified ASOF quality of life questionnaire and a measurement of any side effects related to training will be offered.
Hypothesis tested:
The aim of this work is to evaluate the effectiveness of a specific olfaction training protocol in patients with olfaction disorders following stroke.
Detailed Description:
None
Study Oversight
Has Oversight DMC:
False
Is a FDA Regulated Drug?:
False
Is a FDA Regulated Device?:
False
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?: