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Intraperitoneal Dexamethasone Spraying on Vagal Nerve-Rich Areas for Prevention of Hoarseness After Upper Abdominal Surgery

18 juli 2026 bijgewerkt door: shikaige, Fujian Medical University Union Hospital

Intraperitoneal Dexamethasone Spraying on Vagal Nerve-Rich Areas for Prevention of Hoarseness After Upper Abdominal Surgery: A Prospective Randomized Controlled Trial

The goal of this clinical trial is to evaluate whether intraoperative spraying of dexamethasone onto the abdominal vagal nerve-rich areas can prevent postoperative hoarseness in patients undergoing elective upper abdominal surgery. The main questions it aims to answer are:

  • Does intraoperative topical dexamethasone spraying reduce the incidence of postoperative hoarseness after upper abdominal surgery?
  • Does postoperative intravenous dexamethasone accelerate recovery in patients who develop hoarseness? Researchers will compare a dexamethasone group (intraoperative spraying of 10 mg dexamethasone in 10 mL normal saline) to a placebo group (intraoperative spraying of 10 mL normal saline alone) to see if dexamethasone reduces the rate of postoperative hoarseness.

Participants will:

  • Undergo voice assessment (GRBAS scale) and voice recording before surgery and daily for 10 days after surgery.
  • Be randomly assigned to receive either dexamethasone or placebo sprayed onto the surgical field at the end of the operation.
  • If hoarseness develops in the placebo group, be randomly assigned again to receive either intravenous dexamethasone (5 mg daily for 3 days) or placebo.

Studie Overzicht

Toestand

Nog niet aan het werven

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

The mechanism of postoperative hoarseness remains unclear. It is traditionally attributed to direct injury to the recurrent laryngeal nerve or to endotracheal intubation. However, the surgical field in upper abdominal procedures is remote from the recurrent laryngeal nerve, yet the incidence of hoarseness is higher than in many other surgeries. Preclinical animal experiments by the research group have demonstrated that electrical or thermal stimulation of the subdiaphragmatic vagal nerve can induce vocal cord paralysis, and that immediate topical spraying of dexamethasone onto the affected area significantly reduces this effect. It is hypothesized that thermal injury to vagal nerve fibers in the upper abdomen triggers aberrant signaling through the solitary nucleus to the nucleus ambiguus, ultimately resulting in dysfunction of the recurrent laryngeal nerve.

This trial is designed as a single-center, prospective, randomized, double-blind, placebo-controlled study. A total of 584 adult patients scheduled for elective gastric, hepatobiliary, or pancreaticoduodenal surgery will be enrolled. At the end of the main surgical procedure and before abdominal closure, the surgeon will spray 10 mg of dexamethasone onto the vagal nerve-rich areas, such as the peritoneum around the esophageal hiatus, the lesser omental sac, and the surface of the hepatoduodenal ligament.

Voice assessments will be conducted daily from postoperative day 1 through day 10 using the GRBAS scale by a trained evaluator blinded to group assignment. Patients will also undergo voice acoustic recording for Praat analysis. Those in the placebo group who develop hoarseness will be re-randomized to receive either intravenous dexamethasone 5 mg or placebo daily for 3 days.

Studietype

Ingrijpend

Inschrijving (Geschat)

584

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

  • Volwassen
  • Oudere volwassene

Accepteert gezonde vrijwilligers

Nee

Beschrijving

Inclusion Criteria:

  • Age 18 to 75 years, both sexes.
  • Elective abdominal surgery (including gastric, hepatobiliary, and pancreaticoduodenal surgery) under general anesthesia.
  • American Society of Anesthesiologists (ASA) physical status classification I-III.
  • Preoperative GRBAS Grade (G) score = 0 (no hoarseness).
  • Signed written informed consent.

Exclusion Criteria:

  • Need for systemic glucocorticoid therapy during hospitalization for other reasons.
  • Pre-existing hoarseness, vocal cord paralysis, or organic vocal cord lesions.
  • History of neck surgery, neck radiotherapy, or laryngeal surgery.
  • Known allergy to dexamethasone or other glucocorticoids.
  • Active peptic ulcer or gastrointestinal bleeding within 6 months prior to enrollment.
  • Uncontrolled diabetes mellitus or severe active infection.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Preventie
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Dubbele

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: Dexamethasone Prophylaxis Group
At the end of surgery before abdominal closure, 10 mg dexamethasone diluted in 10 mL normal saline is sprayed onto the vagal nerve-rich areas: peritoneum around the esophageal hiatus, lesser omental sac, and surface of the hepatoduodenal ligament. Voice assessed daily (GRBAS scale + Praat recording) from postoperative day 1-10.
Geneesmiddel: Dexamethasone
Dexamethasone 10 mg diluted in 10 mL normal saline, sprayed topically onto the vagal nerve-rich areas (esophageal hiatus, lesser omental sac, hepatoduodenal ligament) once at the end of surgery before abdominal closure.
Placebo-vergelijker: Placebo Control Group
At the end of surgery before abdominal closure, 10 mL normal saline alone is sprayed onto the same vagal nerve-rich areas. Voice assessed daily (GRBAS scale + Praat recording) from postoperative day 1-10. Patients who develop hoarseness (GRBAS Grade ≥2) are re-randomized to receive intravenous dexamethasone 5 mg or placebo daily for 3 days.
Geneesmiddel: Saline (0.9% NaCl)
10 mL normal saline sprayed topically onto the same vagal nerve-rich areas once at the end of surgery before abdominal closure. Patients in the placebo group who develop hoarseness (GRBAS Grade ≥ 2) will be re-randomized to receive intravenous dexamethasone 5 mg daily or placebo for 3 days.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Incidence of postoperative hoarseness within 10 days
Tijdsspanne: Postoperative day 1 to day 10.
The proportion of patients with a GRBAS (Grade, Roughness, Breathiness, Asthenia, Strain) Grade (G) score ≥ 2 at any time point from postoperative day 1 to day 10.
Postoperative day 1 to day 10.

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Time to recovery from hoarseness
Tijdsspanne: From first diagnosis of hoarseness (GRBAS G ≥2) to recovery of voice (GRBAS G <2), assessed up to postoperative day 10.
From first diagnosis of hoarseness (GRBAS G ≥2) to recovery of voice (GRBAS G <2), assessed up to postoperative day 10.
Change in objective voice acoustic parameters measured by Praat software
Tijdsspanne: Postoperative day 1 to day 10.
Voice samples are recorded using the same professional recording device with the participant producing a sustained vowel /a:/ for at least 5 seconds (sampling rate 44.1 kHz or 48 kHz, mono, WAV format). The recorded samples are analyzed using Praat software (University of Amsterdam) to extract the following parameters: Jitter (local, %), Fundamental Frequency (F0, Hz), and Harmonics-to-Noise Ratio (HNR, dB). The change in each parameter from baseline will be reported for each group.
Postoperative day 1 to day 10.
Change in Grade, Roughness, Breathiness, Asthenia, and Strain (GRBAS) scale subscores over time
Tijdsspanne: Postoperative day 1 to day 10.
The GRBAS (Grade, Roughness, Breathiness, Asthenia, Strain) scale is a perceptual voice assessment tool. For this study, only the Grade (G) subscore is measured. The G subscore assesses overall hoarseness severity on a 0-3 scale (0=normal, 1=mild, 2=moderate, 3=severe), with higher scores indicating worse voice quality. The G subscore is assessed daily from postoperative day 1 through day 10 and compared between groups to evaluate the trajectory of voice changes. The other four dimensions (R, B, A, S) are not formally scored in this study.
Postoperative day 1 to day 10.

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Fujian Medical University Union Hospital

Onderzoekers

  • Hoofdonderzoeker: ZHONGMENG LAI, Fujian Medical University Union Hospital

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Geschat)

27 juli 2026

Primaire voltooiing (Geschat)

30 januari 2027

Studie voltooiing (Geschat)

1 maart 2027

Studieregistratiedata

Eerst ingediend

11 juli 2026

Eerst ingediend dat voldeed aan de QC-criteria

18 juli 2026

Eerst geplaatst (Werkelijk)

23 juli 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

23 juli 2026

Laatste update ingediend die voldeed aan QC-criteria

18 juli 2026

Laatst geverifieerd

1 juli 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • 2026KY683

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

NEE

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

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