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vNOTES vs Laparoscopy: Respiratory Mechanics and Hemodynamics

19 juin 2026 mis à jour par: Selvinaz Yüksel Tanrıverdi, Bursa Yuksek Ihtisas Training and Research Hospital

Comparison of the Effects of vNOTES and Laparoscopic Gynecological Surgery on Intraoperative Respiratory Mechanics and Hemodynamics: A Prospective Observational Cohort Study

Pneumoperitoneum and Trendelenburg position are unavoidable in laparoscopic surgery and are known to have adverse effects on intraoperative respiratory mechanics and hemodynamics. These conditions increase the risk of ventilator-induced lung injury (VILI) and highlight the importance of lung-protective ventilation strategies.

vNOTES (Vaginal Natural Orifice Transluminal Endoscopic Surgery) is a minimally invasive technique that requires less Trendelenburg tilt and lower insufflation pressures compared to conventional laparoscopic surgery, and may therefore offer a more favorable intraoperative profile.

This prospective, observational, single-center, parallel-group cohort study aims to compare respiratory mechanics parameters (Ppeak, Pplateau, DP, MPtot, MPdyn, Crs) and hemodynamic parameters (MAP, HR, vasopressor requirement) between vNOTES (n=15) and laparoscopic gynecological surgery (n=15) groups at four intraoperative time points.

Aperçu de l'étude

Statut

Pas encore de recrutement

Les conditions

Intervention / Traitement

Description détaillée

This study aims to compare vNOTES (Vaginal Natural Orifice Transluminal Endoscopic Surgery) and laparoscopic gynecological surgery in terms of intraoperative respiratory mechanics and hemodynamics in patients scheduled for elective gynecological surgery.

The findings of this study will contribute to more effective planning of ventilation and hemodynamic management by anesthesiologists in vNOTES cases, the development of lung-protective ventilation protocols, and the improvement of perioperative anesthesia quality.

This study is designed as a prospective, observational, single-center, parallel-group cohort study. Patients scheduled for elective gynecological surgery will be divided into two groups according to the surgical technique: Group 1 (vNOTES, n=15) and Group 2 (Laparoscopic surgery, n=15). No randomization will be performed; the surgical technique, insufflation pressure, and Trendelenburg angle will be left to the clinician's discretion.

Measurements will be performed at four time points: T0 (10th minute after intubation, before insufflation), T1 (15th minute after pneumoperitoneum and Trendelenburg positioning), T2 (45th minute after pneumoperitoneum; or the last 5 minutes before desufflation in cases where the 45th minute is not reached), and T3 (15th minute after desufflation). At each time point, respiratory mechanics parameters (Ppeak, Pplateau, DP, MPtot, MPdyn, Crs), hemodynamic parameters (MAP, HR, vasopressor requirement), and intraoperative opioid consumption will be recorded. Insufflation pressure, Trendelenburg angle, and surgical duration will be recorded as confounding variables.

Type d'étude

Observationnel

Inscription (Estimé)

30

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Coordonnées de l'étude

Lieux d'étude

    • Yıldırım
      • Bursa, Yıldırım, Turquie (Türkiye), 16350
        • Bursa Yuksek Ihtisas Training and Research Hospital
        • Contact:

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

  • Adulte
  • Adulte plus âgé

Accepte les volontaires sains

Non

Méthode d'échantillonnage

Échantillon non probabiliste

Population étudiée

Adult female patients aged 18-75 years scheduled for elective gynecological surgery under general anesthesia.

La description

Inclusion Criteria:

  • Female patients aged 18 to 75 years
  • Patients scheduled for elective gynecological surgery
  • Patients undergoing mechanical ventilation under general anesthesia
  • ASA physical status I-III
  • Patients providing written informed consent

Exclusion Criteria:

  • Severe or uncontrolled chronic obstructive pulmonary disease, asthma, or other chronic pulmonary diseases
  • Cardiac arrhythmia
  • ASA physical status IV or above
  • Patients developing intraoperative hemodynamic instability
  • Patients receiving spinal or epidural anesthesia
  • Cases requiring conversion to laparoscopy or laparotomy
  • Patients refusing to participate

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

Cohortes et interventions

Groupe / Cohorte
Intervention / Traitement
vNOTES Group
Patients undergoing elective gynecological surgery via Vaginal Natural Orifice Transluminal Endoscopic Surgery (vNOTES).
Elective gynecological surgery performed via vaginal natural orifice transluminal endoscopic surgery with lower Trendelenburg angle and insufflation pressure compared to conventional laparoscopy.
Autres noms:
  • Chirurgie endoscopique transluminale à orifice naturel
  • Vaginal NOTES
Laparoscopic Surgery Group
Patients undergoing elective gynecological surgery via conventional laparoscopic surgery.
Conventional laparoscopic gynecological surgery performed with standard pneumoperitoneum and Trendelenburg positioning.
Autres noms:
  • Laparoscopie

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Driving Pressure (DP)
Délai: Intraoperative (T0: 10th minute after intubation before insufflation; T1: 15th minute after pneumoperitoneum and Trendelenburg positioning; T2: 45th minute after pneumoperitoneum; T3: 15th minute after desufflation)
Driving pressure measured at four intraoperative time points to compare the effects of vNOTES and laparoscopic gynecological surgery on respiratory mechanics.
Intraoperative (T0: 10th minute after intubation before insufflation; T1: 15th minute after pneumoperitoneum and Trendelenburg positioning; T2: 45th minute after pneumoperitoneum; T3: 15th minute after desufflation)
Peak Airway Pressure (Ppeak)
Délai: Intraoperative (T0: 10th minute after intubation before insufflation; T1: 15th minute after pneumoperitoneum and Trendelenburg positioning; T2: 45th minute after pneumoperitoneum; T3: 15th minute after desufflation)
Peak airway pressure measured at four intraoperative time points to compare the effects of vNOTES and laparoscopic gynecological surgery on respiratory mechanics.
Intraoperative (T0: 10th minute after intubation before insufflation; T1: 15th minute after pneumoperitoneum and Trendelenburg positioning; T2: 45th minute after pneumoperitoneum; T3: 15th minute after desufflation)
Plateau Pressure (Pplateau)
Délai: Intraoperative (T0: 10th minute after intubation before insufflation; T1: 15th minute after pneumoperitoneum and Trendelenburg positioning; T2: 45th minute after pneumoperitoneum; T3: 15th minute after desufflation)
Plateau pressure measured at four intraoperative time points to compare the effects of vNOTES and laparoscopic gynecological surgery on respiratory mechanics.
Intraoperative (T0: 10th minute after intubation before insufflation; T1: 15th minute after pneumoperitoneum and Trendelenburg positioning; T2: 45th minute after pneumoperitoneum; T3: 15th minute after desufflation)
Respiratory System Compliance (Crs)
Délai: Intraoperative (T0: 10th minute after intubation before insufflation; T1: 15th minute after pneumoperitoneum and Trendelenburg positioning; T2: 45th minute after pneumoperitoneum; T3: 15th minute after desufflation)
Respiratory system compliance measured at four intraoperative time points to compare the effects of vNOTES and laparoscopic gynecological surgery on respiratory mechanics.
Intraoperative (T0: 10th minute after intubation before insufflation; T1: 15th minute after pneumoperitoneum and Trendelenburg positioning; T2: 45th minute after pneumoperitoneum; T3: 15th minute after desufflation)
Mean Arterial Pressure (MAP)
Délai: Intraoperative (T0: 10th minute after intubation before insufflation; T1: 15th minute after pneumoperitoneum and Trendelenburg positioning; T2: 45th minute after pneumoperitoneum; T3: 15th minute after desufflation)
Mean arterial pressure measured at four intraoperative time points to compare the hemodynamic effects of vNOTES and laparoscopic gynecological surgery.
Intraoperative (T0: 10th minute after intubation before insufflation; T1: 15th minute after pneumoperitoneum and Trendelenburg positioning; T2: 45th minute after pneumoperitoneum; T3: 15th minute after desufflation)
Heart Rate (HR)
Délai: Intraoperative (T0: 10th minute after intubation before insufflation; T1: 15th minute after pneumoperitoneum and Trendelenburg positioning; T2: 45th minute after pneumoperitoneum; T3: 15th minute after desufflation)
Heart rate measured at four intraoperative time points to compare the hemodynamic effects of vNOTES and laparoscopic gynecological surgery.
Intraoperative (T0: 10th minute after intubation before insufflation; T1: 15th minute after pneumoperitoneum and Trendelenburg positioning; T2: 45th minute after pneumoperitoneum; T3: 15th minute after desufflation)

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Mechanical Power (MPtot and MPdyn)
Délai: Intraoperative (T0: 10th minute after intubation before insufflation; T1: 15th minute after pneumoperitoneum and Trendelenburg positioning; T2: 45th minute after pneumoperitoneum; T3: 15th minute after desufflation)
Total and dynamic mechanical power calculated at four intraoperative time points to assess ventilator-induced lung injury risk in vNOTES and laparoscopic gynecological surgery.
Intraoperative (T0: 10th minute after intubation before insufflation; T1: 15th minute after pneumoperitoneum and Trendelenburg positioning; T2: 45th minute after pneumoperitoneum; T3: 15th minute after desufflation)
Vasopressor Requirement
Délai: ntraoperative (from surgical start to end of surgery)
Incidence of vasopressor use and total vasopressor dose administered intraoperatively in vNOTES and laparoscopic gynecological surgery groups.
ntraoperative (from surgical start to end of surgery)
Intraoperative Opioid Consumption
Délai: Intraoperative (from surgical start to end of surgery)
Cumulative total opioid consumption (fentanyl in mcg and/or remifentanil in mcg/kg/min) administered from the start of surgery to the end of surgery in vNOTES and laparoscopic gynecological surgery groups.
Intraoperative (from surgical start to end of surgery)

Collaborateurs et enquêteurs

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Publications et liens utiles

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Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Estimé)

1 juillet 2026

Achèvement primaire (Estimé)

1 juillet 2027

Achèvement de l'étude (Estimé)

1 juillet 2027

Dates d'inscription aux études

Première soumission

19 juin 2026

Première soumission répondant aux critères de contrôle qualité

19 juin 2026

Première publication (Réel)

25 juin 2026

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

25 juin 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

19 juin 2026

Dernière vérification

1 juin 2026

Plus d'information

Termes liés à cette étude

Autres numéros d'identification d'étude

  • BursaYIERHTanriverdi-001

Plan pour les données individuelles des participants (IPD)

Prévoyez-vous de partager les données individuelles des participants (DPI) ?

NON

Description du régime IPD

Individual participant data will not be shared due to patient confidentiality concerns.

Informations sur les médicaments et les dispositifs, documents d'étude

Étudie un produit pharmaceutique réglementé par la FDA américaine

Non

Étudie un produit d'appareil réglementé par la FDA américaine

Non

Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .