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

31. Oktober 2026 aktualisiert von: 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.

Studienübersicht

Status

Rekrutierung

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

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.

Studientyp

Interventionell

Einschreibung (Geschätzt)

105

Phase

  • Unzutreffend

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

Studieren Sie die Kontaktsicherung

Studienorte

    • Al-Qassim Region
      • Buraidah, Al-Qassim Region, Saudi-Arabien, 51452
        • Rekrutierung
        • Qassim University Medical City
        • Kontakt:

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

18 Jahre bis 60 Jahre (Erwachsene)

Akzeptiert gesunde Freiwillige

Nein

Studienberechtigte Geschlechter

Alle

Beschreibung

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

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Verhütung
  • Zuteilung: Zufällig
  • Interventionsmodell: Parallele Zuordnung
  • Maskierung: Vervierfachen

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: 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.

Schein-Komparator: 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.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Incidence of Postoperative Sore Throat (POST) at 1 Hour Post-Extubation
Zeitfenster: 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

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
POST Severity - Visual Analogue Scale
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 6 hours and 24 hours post-extubation
6 hours and 24 hours post-extubation
Time to First Analgesic Request for Throat Pain
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 24 hours (pooled data)

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

24 hours (pooled data)

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Ermittler

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

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Geschätzt)

15. Oktober 2026

Primärer Abschluss (Geschätzt)

15. April 2027

Studienabschluss (Geschätzt)

30. April 2027

Studienanmeldedaten

Zuerst eingereicht

6. Oktober 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

6. Oktober 2026

Zuerst gepostet (Tatsächlich)

13. Oktober 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

3. November 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

31. Oktober 2026

Zuletzt verifiziert

1. Oktober 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Andere Studien-ID-Nummern

  • QU-IRB-26-40-09-2026
  • 26-40-09 (Andere Kennung: Qassim University Bioethics IRB)

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

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