Clinical trial · Interventional
Nitrous Oxide for Identifying the Intersegmental Plane in Segmentectomy: A Randomized Controlled Trial
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
Lung cancer is currently one of the most common malignant tumors in the world. In recent years, with the popularity of high-resolution CT, more and more early-stage lung cancers have been found. Anatomic pneumonectomy is gradually popular because it can completely remove lung nodules and preserve lung function to the greatest extent. During the surgery, the precise and rapid determination of intersegmental border is one of the key technologies. Improved inflation-deflation method is currently the most widely used method in clinical practice. Previous studies demonstrated that increasing the concentration of nitrous oxide in mixtures of N2O/O2 will lead to a faster rate of collapse. The rapid diffusion properties of N2O would be expected to speed lung collapse and so facilitate surgery. This study was designed to explore three types of inspired gas mixture used during two-lung anesthesia had an effect on the intersegmental border appearance time during pneumonectomy and its feasibility and safety: 75% N2O (O2: N2O = 1: 3), 50% N2O (O2: N2O = 1: 1), 100% oxygen.
Conditions
Conditions (3)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Lung Cancer | Malignant Lung Neoplasm | CURATED_EXACT | 0.92 |
| Pulmonary Nodule, Multiple | — | UNRESOLVED | — |
| Pulmonary Nodule, Solitary | — | UNRESOLVED | — |
Interventions
Interventions (1)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| nitrous oxide | Procedure | — | UNRESOLVED |
Design
Arms and outcomes
Arms (3)
- type
- EXPERIMENTAL
- label
- Group75
- description
- According to preoperative 3D-CTBA evaluation of bronchial and vascular structure of pulmonary nodules and pulmonary segments, the target segmental bronchus, arteries and intra-segment veins were accurately identified and dissected by ligation or stapler cutting. After that, the anesthesiologist began to make preparations for the lung inflation. The portable nitrous oxide concentration detector (TD600-SH-B-N2O) was installed to detect N2O concentration (vol%), and then adjusted the anesthesia machine to the manual control mode. The flow of the selected gas mixture was set to 8L/min (Group75 set to N2O:O2=6:2). When the N2O concentration detector reached the predetermined gas concentration, and then the collapsed lung was re-expanded completely with controlled airway pressure under 20 cmH2O (1cm H2O=0.098 kPa) by the anesthesiologist. This procedure took approximately 1 min, and then FiO2=1.0 was performed after the initiation of the OLV.
- interventionNames
- Procedure: nitrous oxide
- type
- EXPERIMENTAL
- label
- Group50
- description
- According to preoperative 3D-CTBA evaluation of bronchial and vascular structure of pulmonary nodules and pulmonary segments, the target segmental bronchus, arteries and intra-segment veins were accurately identified and dissected by ligation or stapler cutting. After that, the anesthesiologist began to make preparations for the lung inflation. The portable nitrous oxide concentration detector (TD600-SH-B-N2O) was installed to detect N2O concentration (vol%), and then adjusted the anesthesia machine to the manual control mode. The flow of the selected gas mixture was set to 8L/min (Group50 set to N2O:O2=4:4). When the N2O concentration detector reached the predetermined gas concentration, and then the collapsed lung was re-expanded completely with controlled airway pressure under 20 cmH2O (1cm H2O=0.098 kPa) by the anesthesiologist. This procedure took approximately 1 min, and then FiO2=1.0 was performed after the initiation of the OLV.
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 20 Years
- Maximum age
- 70 Years
Show eligibility criteria text
Inclusion Criteria: 1、20 to 70 years of age; 2、early stage lung cancer（diameter of tumor consolidation ≤ 2cm, none evidence of lymph node or distant metas-tasis, c-stage ⅠA1 or ⅠA2）（active limited resection）； 3、 patients at high risk due to poor general condition who cannot undergo lobectomy (c-stage IA1 to IA3) (passive limited resection) Exclusion Criteria: 1. a history of severe asthma or pneumothorax； 2. pulmonary bullae on chest CT； 3. patient refusal
References
Publications (0)
Data not yet available