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Pharyngeal Mucosal Conditioning to Prevent Postoperative Sore Throat in Septoplasty Patients With Severe Nasal Obstruction (POST-MUCOSAL R)

31 ottobre 2026 aggiornato da: Mohamed Ahmed Tolba, Mansoura University

Multimodal Pharyngeal Mucosal Conditioning Versus Standard Care for Prevention of Postoperative Sore Throat in Septoplasty Patients With Severe Preoperative Nasal Obstruction: A Double-Blind Randomized Controlled Trial

Postoperative sore throat (POST) affects 21-65% of patients after endotracheal intubation and is among the most common complaints after general anesthesia. Patients presenting for septoplasty with severe nasal obstruction (NOSE score ≥55) are habitual chronic mouth-breathers, having bypassed nasal air conditioning for months to years preoperatively. This produces a documented state of pharyngeal mucosal dehydration and inflammation that precedes any surgical event - making these patients a distinct high-risk subgroup for POST that has never been identified or studied.

This double-blind RCT will test whether a simple, low-cost multimodal pharyngeal mucosal conditioning strategy - nebulized 0.9% normal saline (5 mL over 15 minutes, 30 minutes before induction) combined with a water-soluble lubricant gel applied to the endotracheal tube - reduces POST incidence and severity compared to standard care (sham nebulization plus plain water on the ETT).

105 adults aged 18-60 years with NOSE score ≥55 scheduled for elective septoplasty under general anesthesia will be randomized 1:1. The primary outcome is POST incidence at 1 hour post-extubation assessed by a blinded PACU nurse. Secondary outcomes include POST severity (VAS 0-10) at 1h, 6h, and 24h; hoarseness; dysphagia; PONV; time to first analgesic; and preoperative pharyngeal mucosal hydration measured by the Modified Schirmer Test.

Panoramica dello studio

Stato

Reclutamento

Condizioni

Intervento / Trattamento

Descrizione dettagliata

BACKGROUND:

Existing literature on POST in nasal surgery treats all septoplasty patients as homogeneous, regardless of nasal obstruction severity. Patients with severe obstruction (NOSE score ≥55) are chronic mouth-breathers who bypass normal nasal air humidification, producing measurable pharyngeal mucosal dehydration, epithelial thinning, and chronic dry inflammation - a pre-existing vulnerability amplified by intubation and throat pack placement.

INTERVENTION:

Group A (Intervention): Nebulized 0.9% NaCl (5 mL, 15 min via compressor jet nebulizer, particle size 2-5 µm) administered 30 minutes pre-induction with patient breathing through mouth; plus water-soluble lubricant gel (K-Y Jelly or equivalent) applied to ETT cuff and distal 5 cm.

Group B (Control): Sham nebulization (room air, identical device and duration); ETT lubricated with plain water only.

STANDARDIZED PROTOCOL (both groups):

Induction: propofol 1.5-2 mg/kg + fentanyl 1-2 µg/kg + rocuronium 0.6 mg/kg. Maintenance: sevoflurane 1.0-1.5 MAC in O2/Air (no nitrous oxide). ETT cuff maintained at 20-25 cmH2O (checked every 30 minutes by calibrated aneroid manometer). Standardized saline-soaked throat pack for all patients. Awake extubation with single gentle suction.

NOVEL ELEMENTS:

  1. First RCT to enroll nasal surgery patients specifically by NOSE score severity
  2. First study to test preoperative mucosal conditioning as a POST prevention strategy in chronic mouth-breathers
  3. Preoperative mucosal hydration measured by Modified Schirmer Test and VAS dryness score before and after nebulization

RANDOMIZATION AND BLINDING:

Computer-generated block randomization (variable blocks of 4 and 6), stratified by NOSE severity (55-75 vs 80-100). Allocation concealed via sequentially numbered opaque sealed envelopes. Outcome assessor and patient blinded; anesthesiologist not blinded but is not the outcome assessor.

SAMPLE SIZE:

n=105 (52-53/group); 80% power; two-sided alpha=0.05; anticipated 65% POST incidence in control group; clinically meaningful absolute reduction of 35%; 15% dropout allowance.

Tipo di studio

Interventistico

Iscrizione (Stimato)

105

Fase

  • Non applicabile

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Contatto studio

Backup dei contatti dello studio

Luoghi di studio

    • Al-Qassim Region
      • Buraidah, Al-Qassim Region, Arabia Saudita, 51452
        • Reclutamento
        • Qassim University Medical City
        • Contatto:

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

Da 18 anni a 60 anni (Adulto)

Accetta volontari sani

No

Sessi ammissibili allo studio

Tutto

Descrizione

Inclusion Criteria:

  • Age 18 to 60 years
  • ASA physical status I or II
  • NOSE score ≥55 (severe or extreme nasal obstruction category) at preoperative assessment
  • Duration of nasal obstruction symptoms ≥6 months
  • Scheduled for elective septoplasty ± turbinoplasty under general anesthesia with endotracheal intubation
  • Mallampati class I or II
  • BMI ≤35 kg/m²
  • Written informed consent obtained

Exclusion Criteria:

  • Current or past smoker (any amount)
  • Gastroesophageal reflux disease (GERD) or laryngopharyngeal reflux (LPR)
  • Known pharyngeal or laryngeal pathology
  • Active upper respiratory tract infection within 2 weeks of scheduled surgery
  • Preoperative sore throat or baseline pharyngeal pain at time of assessment
  • Anticipated difficult airway (Mallampati class III-IV, mouth opening less than 3 cm)
  • ACE inhibitor use (causes dry cough, confounds POST assessment)
  • Concurrent tonsillectomy, adenoidectomy, or rhinoplasty extending operative time beyond 90 minutes
  • Known allergy to lubricant gel components
  • Severe systemic disease affecting mucosal hydration (Sjögren's syndrome, uncontrolled diabetes mellitus, end-stage renal disease)
  • Pregnancy or breastfeeding
  • Previous participation in this study

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Prevenzione
  • Assegnazione: Randomizzato
  • Modello interventistico: Assegnazione parallela
  • Mascheramento: Quadruplicare

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Sperimentale: Group A - Multimodal Pharyngeal Mucosal Conditioning

Nebulized 0.9% normal saline (5 mL over 15 minutes via compressor jet nebulizer, particle size 2-5 µm) administered 30 minutes before anesthetic induction with patient breathing through the mouth; followed by water-soluble lubricant gel (K-Y Jelly or equivalent) applied uniformly to the ETT cuff and distal 5 cm immediately before intubation.

0.9% Normal saline 5 mL nebulized over 15 minutes via compressor jet nebulizer (target particle size 2-5 µm) administered 30 minutes before anesthetic induction, with patient breathing normally through the mouth to maximize pharyngeal deposition.

Water-soluble lubricant gel (K-Y Jelly or bioequivalent) applied uniformly to the ETT cuff outer surface and distal 5 cm of the ETT shaft immediately before endotracheal intubation.

Comparatore fittizio: Group B - Standard Care (Sham Control)

Sham nebulization using an identical compressor device delivering room air only (15 minutes, same duration and posture as active arm); ETT lubricated with plain water only - current institutional standard practice.

Identical compressor nebulizer device delivering room air only, operated for 15 minutes. Device produces the same sound and airflow as the active nebulizer. No saline delivered.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Incidence of Postoperative Sore Throat (POST) at 1 Hour Post-Extubation
Lasso di tempo: 1 hour after extubation

POST assessed by a blinded PACU nurse using a validated 4-point categorical scale: 0 = no sore throat; 1 = mild (only on direct questioning, no analgesic required); 2 = moderate (spontaneous complaint, non-opioid analgesic given); 3 = severe (spontaneous complaint, opioid analgesic required). POST is considered present if score ≥1.

1 hour after extubation

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
POST Severity - Visual Analogue Scale
Lasso di tempo: 1 hour, 6 hours, and 24 hours post-extubation

POST severity scored on VAS 0-10 (0=no pain, 10=worst imaginable pain) by blinded assessor at 1h, 6h, and 24h.

1 hour, 6 hours, and 24 hours post-extubation
Incidence and Severity of Hoarseness
Lasso di tempo: Hoarseness graded 0-3 (0=none; 1=mild/perceived only; 2=moderate/noticed by others; 3=severe/aphonia).

1 hour, 6 hours, and 24 hours post-extubation

Hoarseness graded 0-3 (0=none; 1=mild/perceived only; 2=moderate/noticed by others; 3=severe/aphonia).
Incidence and Severity of Dysphagia
Lasso di tempo: 1 hour and 6 hours post-extubation

Dysphagia graded 0-3 (0=none; 1=mild; 2=moderate/significant difficulty; 3=severe/unable to swallow).

1 hour and 6 hours post-extubation
Incidence of Postoperative Nausea and Vomiting
Lasso di tempo: 6 hours and 24 hours post-extubation
6 hours and 24 hours post-extubation
Time to First Analgesic Request for Throat Pain
Lasso di tempo: From extubation to 24 hours post-extubation

Time in minutes from extubation to first patient-initiated request for analgesia specifically for throat pain.

From extubation to 24 hours post-extubation
Preoperative Pharyngeal Mucosal Hydration
Lasso di tempo: Before and after nebulization/sham, approximately 30-40 minutes pre-induction

Mucosal hydration measured by patient VAS dryness score (0-10). Measured before and after nebulization to confirm intervention effect.

Before and after nebulization/sham, approximately 30-40 minutes pre-induction
Patient Satisfaction with Recovery
Lasso di tempo: 24 hours post-extubation

Numerical Rating Scale 0-10 (0=completely unsatisfied, 10=completely satisfied).

24 hours post-extubation
Dose-Response Correlation - NOSE Score and POST Severity
Lasso di tempo: 24 hours (pooled data)

Exploratory Pearson/Spearman correlation between preoperative NOSE score (continuous variable) and POST VAS across both groups

24 hours (pooled data)

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Investigatori

  • Investigatore principale: Mohamed Ahmed Tolba, MD, Mansoura University - Qassim University Medical City

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Stimato)

15 ottobre 2026

Completamento primario (Stimato)

15 aprile 2027

Completamento dello studio (Stimato)

30 aprile 2027

Date di iscrizione allo studio

Primo inviato

6 ottobre 2026

Primo inviato che soddisfa i criteri di controllo qualità

6 ottobre 2026

Primo Inserito (Effettivo)

13 ottobre 2026

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

3 novembre 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

31 ottobre 2026

Ultimo verificato

1 ottobre 2026

Maggiori informazioni

Termini relativi a questo studio

Altri numeri di identificazione dello studio

  • QU-IRB-26-40-09-2026
  • 26-40-09 (Altro identificatore: Qassim University Bioethics IRB)

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

No

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .