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NCT Number: NCT07467135

Lung Mechanics and Ventilation Efficiency in Robotic Surgery

Robotic surgery requires pneumoperitoneum and specific surgical positioning such as steep Trendelenburg, reverse Trendelenburg, or supine positioning. These intraoperative conditions may lead to cranial displacement of the diaphragm, reduced lung compliance, and increased airway pressures, potentially impairing respiratory mechanics and gas exchange.

Previous studies have primarily evaluated respiratory mechanics during robotic surgery at single time points or within specific surgical procedures. However, dynamic changes occurring during critical phases of robotic surgery have rarely been evaluated prospectively.

This prospective observational cohort study aims to evaluate phase-specific changes in lung mechanics and ventilation efficiency during robotic surgery. Key parameters including mechanical power (MP), ventilation efficiency index (VEI), static compliance, and driving pressure will be analyzed across predefined intraoperative phases.

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Key information

Conditions

Robotic Surgery

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Ankara Bilkent City Hospital

Ankara, Turkey (Türkiye)

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Age ≥ 18 years
  • Patients undergoing robotic surgery
  • General anesthesia with mechanical ventilation
  • Written informed consent

Exclusion criteria

  • Severe chronic pulmonary disease
  • Refusal to participate
  • Missing intraoperative ventilatory data

Treatment and study plan

Intraoperative Mechanical Ventilation Monitoring

Other

Prospective recording of ventilatory parameters and respiratory mechanics during robotic surgery under general anesthesia. Measurements will be obtained at predefined surgical phases (after intubation, pneumoperitoneum initiation, steep Trendelenburg positioning, undocking, and before extubation). Recorded parameters include tidal volume, respiratory rate, peak airway pressure, plateau pressure, positive end-expiratory pressure, arterial blood gas measurements, and calculated indices such as mechanical power, driving pressure, static compliance, and ventilation efficiency index.

Primary outcomes

  1. Ventilation Efficiency Index (VEI) change across robotic surgery phases

    Time frame: Intraoperative (T0-T4)

    Evaluation of VEI changes between predefined intraoperative phases.

Secondary outcomes

  1. Mechanical Power Change

    Time frame: intraoperative

    Evaluation of mechanical power changes across surgical phases.

  2. Static Lung Compliance Change

    Time frame: intraoperative

    Evaluation of static compliance changes during robotic surgery.

Sponsors and collaborators

Lead sponsor

Ankara City Hospital Bilkent

Other

Registry information

Official study title

Phase-Specific Evaluation of Lung Mechanics and Ventilation Efficiency During Robotic Surgery: A Prospective Observational Cohort Study

Important dates

Study start
2026
Primary completion
2026
Study completion
2026
First posted
Mar 12, 2026
Registry last updated
Jun 16, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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