Intranasal Insulin for COVID-19-related Smell Loss

July 14, 2022 updated by: Daniel Dibildox Reynoso, Universidad Panamericana
The aim of this study was to quantify the improvement in olfaction of 27 post-COVID-19 patients, after three intreventions of intranasal insulin during a four week period, with the help of the Threshold, Discrimination and Identification (TDI) score evaluated with Sniffin Sticks®.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

27

Phase

  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Mexico
      • Mexico City, Mexico, 03920
        • Universidad Panamerican

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

14 years to 55 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • COVID-19 in the last 3 to 18 months and who persisted with anosmia, hyposmia or other olfactory dysfunction chronically and without improvement

Exclusion Criteria:

  • nasal tumors, chronic sinusitis, drug-induced sinusitis, nasal polyposis, neurodegenerative disease, smoking, pregnancy Hypoglycemia and a previous diagnosis of diabetes mellitus or anatomical malformations such as septal deviation, rhinosinusitis or choanal atresia

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: intranasal insulin
For each selected participant (n=27), a baseline olfactory measurement was performed with Sniffin Sticks® (12 items) and a capillary glucose measurement was obtained with Dextrostix® NF before and after the intervention, in order to guarantee patient safety and reduce the risk of hypoglycemia. The initial and final measurements were divided into three subsections with a different number of correct answers for each section Subsequently, Gelfoam® cottonoids soaked in 40 IU of NPH insulin were placed on the nasal roof (between the nasal septum and the middle meatus) of each nostril. These remained in place for 15 minutes and were later removed. This procedure was performed in three visits one week apart. During the fourth and last visit (one week after the previous visit), olfaction was reevaluated using the measures previously described.
Drug: Insulin
Gelfoam® cottonoids soaked in 40 IU of NPH insulin were placed on the nasal roof (between the nasal septum and the middle meatus) of each nostril. These remained in place for 15 minutes and were later removed. This procedure was performed in three visits one week apart. During the fourth and last visit (one week after the previous visit), olfaction was reevaluated using the measures previously described.
Other Names:
  • intranasal insulin

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
SMELL LOSS IMPROVEMENT
Time Frame: 1 MONTH
1 MONTH

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Universidad Panamericana

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 4, 2021

Primary Completion (Actual)

November 25, 2021

Study Completion (Actual)

December 20, 2021

Study Registration Dates

First Submitted

July 14, 2022

First Submitted That Met QC Criteria

July 14, 2022

First Posted (Actual)

July 18, 2022

Study Record Updates

Last Update Posted (Actual)

July 18, 2022

Last Update Submitted That Met QC Criteria

July 14, 2022

Last Verified

July 1, 2022

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 01007

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

Undecided

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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