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A double-blinded randomised controlled trial of the effects of sodium citrate on olfactory thresholds

A double-blinded randomised controlled trial of the effects of sodium citrate on olfactory thresholds

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN50895907
Enrollment
100
Registered
2007-09-28
Start date
2008-08-11
Completion date
Unknown
Last updated
2017-08-21

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

Conditions

Ear, Nose and Throat: Smell ability Ear, Nose and Throat Smell ability

Interventions

Current interventions as of 19/02/2013: The study will be undertaken at the ENT department of the Leicester Royal Infirmary and in a research laboratory at the University of Leicester and also in the

Sponsors

University Hospitals of Leicester NHS Trust (UK)
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: All patients with an objective reduction in their ability to smell.

Exclusion criteria

Exclusion criteria: Current inclusion criteria as of 19/02/2013: 1. Patients who are proven to have a normal sense of smell 2. Patients with nasal polyps or other sinonasal disease Previous inclusion criteria until 19/02/2013: 1. Patients who are proven to have a normal sense of smell 2. Patients with nasal polyps

Design outcomes

Primary

MeasureTime frame
Primary outcome measure as 29/07/2016: Olfactory threshold for PEA odour is measured using a psychophysical test (two-alternative forced choice ascending ladder technique) at baseline and 15 minute intervals up to 2 hours maximum. Original primary outcome measure: An improvement in their sense of smell and their general well-being.

Secondary

MeasureTime frame
Secondary outcome measure as of 29/07/2016: Olfactory thresholds for ACA, EUC and BUT odours are measured using a psychophysical test (two-alternative forced choice ascending ladder technique) at baseline and 15 minute intervals up to 2 hours maximum. Secondary outcome measures added as of 19/02/2013: A subjective improvement in their sense of smell and their general well-being

Countries

United Kingdom

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026