ClinicalTrials.gg
RecruitingNCT06996509Updated Sep 22, 2026

Noninvasive Support for Acute Respiratory Failure in Guillain-Barré Syndrome

An interventional study of Non-Invasive Ventilation (NIV) and High Velocity Nasal Insufflation in Guillain-Barre Syndrome, sponsored by Assiut University. Recruiting at 2 sites in Egypt. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-09-22.

Sponsored by Assiut University · Not applicable, Interventional, and Supportive care

From the registry’s dates

  • Started Aug 2025; still recruiting 1 year 3 months later.

Help build ClinicalTrials.gg — short surveys, remote interviews or testing, in your language. Take part →

Phase
Not applicable
Study type
Interventional
Enrollment
80
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-13

Among 11 studies in Guillain-Barre Syndrome by Assiut University — 6 open to participants now, 6 under way, none of them phase 3. Guillain-Barre Syndrome · Assiut University.

Started
2025
the only one that year
No phase
2 of 11
1 open now
Registered
9th of 11
by date

Among the 11 studies in Guillain-Barre Syndrome by Assiut University, this one is the only one that started in 2025, is one of 2 with no phase, and was the 9th registered.

Guillain-Barre Syndrome

98 studies on the registry are indexed under Guillain-Barre Syndrome; 30 are open to participants now.

Browse Guillain-Barre Syndrome studies →

Open to participants now

6 of the 11 studies in Guillain-Barre Syndrome by Assiut University are open now, in 1 country. Recruiting first, the newest first:

By country, each count listing its studies:

All 6 open studies →

Where they have run

Who these studies take

Of the 12 Guillain-Barre Syndrome studies recruiting now, 6 (50%) set no upper age limit and 3 (25%) stop at 75 or younger; 5 take children under 18; 6 take healthy volunteers.

This study: 18 Years and older · all sexes · no healthy volunteers.

The full table on the hub →

This tab as a report to print or save as PDF → With an account.

Was this useful?
Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 11 studies in Guillain-Barre Syndrome by Assiut University, or all of them as a file.
02

Study summary

This study will involve 70 adult patients with Guillain-Barré syndrome who have severe breathing problems. It will compare two types of breathing support: high-velocity nasal cannula (HVNC) (which delivers heated and humidified air at 35-60 L/min) and bi-level noninvasive ventilation (NIV) (which uses two pressure levels: inspiratory positive airway pressure (IPAP) 10-16 cmH₂O and expiratory positive airway pressure (EPAP) 5-8O). The main goal is to see how many patients can stop using non-invasive support without needing a breathing machine by Day 30. Other goals include how long it takes to stop using support, how comfortable patients feel, how long they stay in the ICU or hospital, how many days they can breathe on their own, and the number of deaths in 30 days. The main goal is to see how many patients can stop using non-invasive support without needing invasive ventilation by Day 30, while also looking at other factors like how long it takes to stop assistance, how comfortable patients are, how long they stay in the hospital, how many days they can breathe on their own, the number of deaths within 30 days, and their overall health.

Read the detailed description

Guillain-Barré Syndrome (GBS) is an acute autoimmune disorder characterized by rapid-onset muscle weakness due to peripheral nerve damage. A significant complication in GBS is respiratory failure, occurring in approximately 25% of cases, necessitating timely and effective respiratory support to prevent morbidity and mortality.

Non-invasive ventilation (NIV) is a standard intervention for managing acute respiratory failure, particularly in conditions such as chronic obstructive pulmonary disease (COPD). NIV delivers positive pressure ventilation through interfaces such as oronasal masks, providing support without the need for endotracheal intubation. While effective, NIV can be associated with patient discomfort, skin breakdown, and challenges in secretion management, potentially leading to intolerance or failure of the therapy.

High-flow nasal cannula (HFNC) therapy has emerged as an alternative respiratory support modality. HFNC delivers heated and humidified oxygen at high flow rates through nasal prongs, offering several physiological benefits:

Enhanced Oxygenation: By delivering high flow rates, HFNC can meet or exceed the patient's inspiratory demand, ensuring consistent oxygen delivery.

Reduction in Work of Breathing: The continuous flow can generate a low level of positive airway pressure, decreasing the effort required for breathing.

Enhanced Secretion Clearance: Humidified gas supports mucociliary function, facilitating the clearance of secretions.

Patient Comfort: The nasal interface is generally better tolerated than masks used in non-invasive ventilation (NIV), potentially improving adherence to therapy.

Recent studies have explored the efficacy of HFNC compared to NIV in various forms of respiratory failure. While NIV remains the first-line treatment in many scenarios, HFNC has shown promise in improving patient comfort and reducing the need for escalation to invasive mechanical ventilation in specific patient populations.

03

Conditions studied

  • Guillain-Barre Syndrome

Keywords

  • GBS
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Age ≥ 18 years
  • GBS per Brighton criteria (clinical ± cerebrospinal fluid (CSF)/electrodiagnostics)
  • Moderate acute respiratory failure (vital capacity (VC) 15-20 mL/kg and/or arterial partial pressure of carbon dioxide (PaCO₂) > 45 mmHg or arterial partial pressure of oxygen (PaO₂) \< 70 mmHg on room air (RA) and/or respiratory rate (RR) > 24 /min)
  • Hughes Grade 3-4, The Erasmus Guillain-Barré Syndrome Respiratory Insufficiency Score (EGRIS) 1-3, Medical Research Council (MRC) sum score 20-40
  • Glasgow Coma Scale (GCS) ≥ 13, intact cough/gag, stable hemodynamics
  • Onset of respiratory symptoms ≤ 7 days

Exclusion criteria

Exclusion Criteria:

  • Chronic respiratory disease (, interstitial lung diseases (ILD), persistent asthma)
  • Immediate need for invasive ventilation (VC \< 10 mL/kg, unresponsive severe gas-exchange derangement)
  • Severe bulbar dysfunction or prior intubation for the current illness
  • to HVNC/NIV (facial trauma, untreated pneumothorax, agitation, vomiting)
  • Pregnancy
  • Severe comorbidity limiting prognosis.
  • Declined consent
Terms in these criteria, in plain language(2)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

COPD

Chronic obstructive pulmonary disease: long-term lung disease that makes it hard to breathe out, including emphysema and chronic bronchitis.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

05

Study design

Phase
Not applicable
Primary purpose
Supportive care
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
80 participants (estimated)

Study arms

  • Experimental
    Non-Invasive Ventilation (NIV)

    Device \& Settings Bi-level positive airway pressure (BiPAP) is set with an inspiratory positive airway pressure (IPAP) of 10-16 cmH₂O and an expiratory positive airway pressure (EPAP) of 5-8 cmH₂O. Adjust the fraction of inspired oxygen (FiO₂) to achieve an oxygen saturation (SpO₂) of ≥ 92%.

    Device: Non-Invasive Ventilation (NIV)

  • Experimental
    High velocity nasal insufflation (HVNI)

    Device \& Settings The high-velocity nasal cannula system delivers heated, humidified gas at flow rates of 35-60 L/min. FiO₂ titrated to maintain SpO₂ ≥ 92 %.

    Device: High Velocity Nasal Insufflation

Interventions

  • DeviceNon-Invasive Ventilation (NIV)

    Bi-Level NIV delivers two preset pressure levels-Inspiratory Positive Airway Pressure (IPAP) and Expiratory Positive Airway Pressure (EPAP)-via a tightly fitting mask interface

    Also known as: Bi-level Positive airway pressure ventilation (BIPAP)

  • DeviceHigh Velocity Nasal Insufflation

    High-Velocity Nasal Cannula therapy delivers heated, humidified gas at flow rates exceeding patients' peak inspiratory demands (35-60 L/min), with precise FiO₂ control up to 100 %

    Also known as: High velocity nasal cannula, Vapotherm Delivery system

06

What researchers measure

Primary outcomes

  1. Maximize the successful weaning duration in days.

    Examine and compare the percentage of Guillain-Barré syndrome patients who can discontinue using their assigned non-invasive support (HVNC or NIV) without requiring a switch to invasive mechanical ventilation during their initial stay in the intensive care unit (ICU), which will be from 48 hours of randomization and daily for 28 days.

    Time frame: 48 hours after randomization and daily for 28 days.

07

Study locations

2 of 2 sites recruiting
  • Assuit Univeristy
    Asyut, Assuit 71515, Egypt
    Recruiting
    • Ahmad M. Shaddad, MD · Contactshaddad_ahmad@yahoo.com · +201111171930
    • · Contactshaddad_ahmad@yahoo.com
    • Aliae A. Hussien, MD · Principal investigator
    • Maiada K. Hashem, MD · Principal investigator
    • Ahmad M. Abd El-hafeez, MD · Principal investigator
    • Amal M. Tohamy, MD · Principal investigator
  • Faculty of Medicine - Assiut University Hospitals - Assiut University - Egypt
    Asyut, 71515, Egypt
    Recruiting
08

References and documents

Individual participant data

Plan to share: Yes — De-identified individual participant data supporting the primary and secondary outcomes, along with accompanying data dictionaries and the statistical analysis plan, will be made available by Assiut University's institutional data-sharing policies. Data will be accessible 6-36 months after publication to qualified researchers upon submission of a study proposal, approval by the University Research Ethics Committee, and execution of a data-use agreement.

Supporting information: Study protocol, Statistical analysis plan

Time frame: 6-36 months after publication

Access criteria: Qualified researchers must submit a study proposal, obtain approval from the University Research Ethics Committee, and execute a data-use agreement.

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started Aug 2025 (actual). Primary completion is estimated for Dec 2026, 16 months after the start.

How these figures are worked out, and which studies are left out of them.

Registered
May 21, 2025
First posted
May 30, 2025
StartActual
Aug 1, 2025
Primary completionEst.
Dec 1, 2026
CompletionEst.
Feb 1, 2027
Last update
Sep 22, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Sep 22, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06996509
Lead sponsor
Assiut University
Responsible party
Ahmad Shaddad (Associate Professor, Assiut University) — Principal investigator
First posted
May 30, 2025
Start date
Aug 1, 2025
Primary completion
Dec 1, 2026 (estimated)
Completion
Feb 1, 2027 (estimated)
Last update
Sep 22, 2026

Study contacts

Ahmad M. Shaddad, MD
Contact
shaddad_ahmad@yahoo.com
+201111171930
Ahmad M. Shaddad, MD
principal investigator · Assiut University
Aliae A. Hussien, MD
principal investigator · Assiut University

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Interested in this study?

Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.

Contact study team

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion