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vNOTES vs Laparoscopy: Respiratory Mechanics and Hemodynamics

19 de junho de 2026 atualizado por: 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.

Visão geral do estudo

Status

Ainda não está recrutando

Condições

Intervenção / Tratamento

Descrição detalhada

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.

Tipo de estudo

Observacional

Inscrição (Estimado)

30

Contactos e Locais

Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.

Contato de estudo

Locais de estudo

    • Yıldırım
      • Bursa, Yıldırım, Turquia (Türkiye), 16350
        • Bursa Yuksek Ihtisas Training and Research Hospital
        • Contato:

Critérios de participação

Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.

Critérios de elegibilidade

Idades elegíveis para estudo

  • Adulto
  • Adulto mais velho

Aceita Voluntários Saudáveis

Não

Método de amostragem

Amostra Não Probabilística

População do estudo

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

Descrição

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

Plano de estudo

Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.

Como o estudo é projetado?

Detalhes do projeto

Coortes e Intervenções

Grupo / Coorte
Intervenção / Tratamento
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.
Outros nomes:
  • Cirurgia Endoscópica Transluminal por Orifício Natural
  • 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.
Outros nomes:
  • Laparoscopia

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Descrição da medida
Prazo
Driving Pressure (DP)
Prazo: 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)
Prazo: 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)
Prazo: 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)
Prazo: 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)
Prazo: 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)
Prazo: 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)

Medidas de resultados secundários

Medida de resultado
Descrição da medida
Prazo
Mechanical Power (MPtot and MPdyn)
Prazo: 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
Prazo: 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
Prazo: 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)

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Patrocinador

Publicações e links úteis

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Datas de registro do estudo

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Datas Principais do Estudo

Início do estudo (Estimado)

1 de julho de 2026

Conclusão Primária (Estimado)

1 de julho de 2027

Conclusão do estudo (Estimado)

1 de julho de 2027

Datas de inscrição no estudo

Enviado pela primeira vez

19 de junho de 2026

Enviado pela primeira vez que atendeu aos critérios de CQ

19 de junho de 2026

Primeira postagem (Real)

25 de junho de 2026

Atualizações de registro de estudo

Última Atualização Postada (Real)

25 de junho de 2026

Última atualização enviada que atendeu aos critérios de controle de qualidade

19 de junho de 2026

Última verificação

1 de junho de 2026

Mais Informações

Termos relacionados a este estudo

Outros números de identificação do estudo

  • BursaYIERHTanriverdi-001

Plano para dados de participantes individuais (IPD)

Planeja compartilhar dados de participantes individuais (IPD)?

NÃO

Descrição do plano IPD

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

Informações sobre medicamentos e dispositivos, documentos de estudo

Estuda um medicamento regulamentado pela FDA dos EUA

Não

Estuda um produto de dispositivo regulamentado pela FDA dos EUA

Não

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