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InfluenzaPhase 4NCT00137579

Safety of the Intramuscular Route of the Anti-Flu Vaccine in Patients Receiving Oral Anticoagulation Therapy

A Phase 4 study testing Influenza vaccine intramuscular administration route in people with Influenza, run by Catalan Institute of Health at 4 sites in Spain.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

Until now, the best administration route of the anti-flu vaccine for patients receiving long term oral anticoagulation therapy has been the subcutaneous one; the intramuscular route has not been recommended because it may increase the risk of muscular haematoma. Read more about this study

Who is it for?
Ages 18 to 95 years
Conditions the study is for
Influenza
What is being tested?
Influenza vaccine intramuscular administration route
How many people
216 participants
Where
4 sitesSpain
Study dates
Sep 2003to May 2004
Phase
Phase 4
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 95 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Patients with oral anticoagulation therapy
  • Patients who agree to be vaccinated
  • Patients who agree to participate in the study
  • Patients older than 18

Who cannot join

  • Allergy or hypersensibility to egg, chicken proteins, any component of the vaccine (neomycin, octoxinol-9 or formaldehyd)
  • INR greater than 4 in the past 2 months
  • Previous major bleeding
  • Patients with dementia or with legal tutoring

Trial locations and contacts

4 sites in 1 country.

Spain4 sites
  • Raval Nord

    Barcelona, Barcelona, 08001

  • Raval Sud

    Barcelona, Barcelona, 08001

  • Gotic

    Barcelona, Barcelona, 08002

  • Casc Antic

    Barcelona, Barcelona, 08003

Other trials in Spain

About this study

Official title: Phase IV, Simple Blind, 2-Parallel Groups Randomized Trial to Evaluate the Safety and Effectiveness of the Intramuscular Vs Subcutaneous Route for the Administration of the Anti-Flu Vaccine in Patients Receiving Oral Anticoagulation

Until now, the best administration route of the anti-flu vaccine for patients receiving long term oral anticoagulation therapy has been the subcutaneous one; the intramuscular route has not been recommended because it may increase the risk of muscular haematoma. Although this practice is widely extended, no significant differences between the safety of both routes have been found. Some authors, analysing a small group of patients, affirm that the anti-flu vaccine can be administered safely by the intramuscular route on patients receiving long term oral anticoagulation therapy, while a previous opinion article recommended the subcutaneous route without any scientific evidence. Due to this, the investigators have done a clinical trial with the aim of determining the safety and effectiveness of the flu-vaccine intramuscular route in patients receiving long term oral anticoagulation therapy and also to analyse the possible interactions between the vaccine and the oral anticoagulant treatment.

Read the detailed description

Phase IV, simple blind, 2-parallel groups, multicentric randomized trial where each patient will receive a single dose of the recommended by the WHO anti-flu vaccine for the 2003-2004 period, the control group will receive it subcutaneous and intervention group intramuscular. The assignation to each group will be randomized. The study included 4 basic areas of Barcelona city. Three visits have been scheduled for each patient: moment 0, 24 hours and 10 days after the vaccination, and a 7 month follow up period to control the incidence of the flu.

Conditions
Influenza
Being tested
Influenza vaccine intramuscular administration route
Keywords
Influenza Vaccines, Acenocoumarol, Drug Administration Routes, Anticoagulants
Medical subject headings
Influenza, Human

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Influenza vaccine intramuscular administration routeProcedure or surgery

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. local pain (scores greater than 3 in the analogic visual scale of pain)

  2. microbiologically diagnosed flu (yes/no)

  3. International Normalized Ratio (INR) to check the interaction between the vaccine and the oral anticoagulation therapy

Secondary outcomes (2)
  1. increase of the arm perimeter greater than 1 cm

  2. local elemental skin lesions

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted30 Aug 2005 (estimated)
  2. Study startSep 2003
  3. Study completionMay 2004

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Single blind
Enrolment
216 participants
IDs, dates and publications
ClinicalTrials.gov ID
NCT00137579
Sponsor's protocol ID
SINGRIP03
Status last verified
Jan 2003
First submitted
29 Aug 2005
Last updated
13 Dec 2005
Results posted
No

Publications

  • Casajuana J, Iglesias B, Fabregas M, Fina F, Valles JA, Aragones R, Benitez M, Zabaleta E. Safety of intramuscular influenza vaccine in patients receiving oral anticoagulation therapy: a single blinded multi-centre randomized controlled clinical trial. BMC Blood Disord. 2008 May 29;8:1. doi: 10.1186/1471-2326-8-1.

    PubMed 18507871

Questions about this trial

What is this clinical trial studying?

A Phase 4 study testing Influenza vaccine intramuscular administration route in people with Influenza, run by Catalan Institute of Health at 4 sites in Spain.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 4 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 13 Dec 2005. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 4 sites in Spain. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

local pain (scores greater than 3 in the analogic visual scale of pain). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT00137579, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 13 Dec 2005.

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