Questa pagina è stata tradotta automaticamente e l'accuratezza della traduzione non è garantita. Si prega di fare riferimento al Versione inglese per un testo di partenza.

Robot-Assisted Versus Free-Hand CT-Guided Flexible Guidewire Localization of Pulmonary Nodules

7 novembre 2026 aggiornato da: Peking University Third Hospital

A Prospective Randomized Controlled Study of Robot-Assisted Versus Conventional Free-Hand CT-Guided Preoperative Flexible Guidewire Localization of Pulmonary Nodules

Small pulmonary nodules can be difficult to identify during thoracoscopic surgery. CT-guided flexible guidewire localization helps surgeons locate these nodules before resection. This study compares robot-assisted and conventional free-hand localization at Peking University Third Hospital. Sixty adults who require preoperative localization will be randomly assigned to one of two groups, with 30 participants in each group. Both groups will use the same type of flexible guidewire localization needle. The primary objective is to compare radiation exposure measured by dose-length product. The study will also assess puncture performance, localization accuracy, procedure duration, CT scan count, and procedure-related complications.

Panoramica dello studio

Stato

Reclutamento

Condizioni

Intervento / Trattamento

Descrizione dettagliata

This investigator-initiated, prospective, single-center, randomized, parallel-group study compares robot-assisted and conventional free-hand CT-guided flexible guidewire localization before thoracoscopic pulmonary nodule resection. Written informed consent is obtained before enrollment.

Participants undergo a localization difficulty assessment. A computer-generated sequence assigns participants in a 1:1 ratio within low- and high-difficulty strata using block randomization. Both groups use the same type of flexible guidewire localization needle. In the robot-assisted group, CT images are used for three-dimensional reconstruction and trajectory planning. The physician confirms the target, entry point, angle, and depth, and inserts the needle with robotic trajectory guidance. Repeat CT confirms the needle position, and the guidewire is deployed after the planned target region has been reached. Post-localization CT assesses guidewire position and complications.

The procedure is open-label. The protocol specifies blinded assessment of post-localization CT images by two independent imaging physicians. Planned and actual puncture angles and depths, and the distance between the planned target and actual needle tip, are also recorded in the robot-assisted group. Conversion to free-hand localization is permitted when required for participant safety because of robotic system failure or failed registration, and the reason is recorded.

Continuous variables are summarized as means and standard deviations or medians and interquartile ranges, as appropriate. Between-group comparisons use the independent-samples t test or Mann-Whitney U test. Categorical variables are compared using the chi-square test or Fisher exact test.

Tipo di studio

Interventistico

Iscrizione (Stimato)

60

Fase

  • Non applicabile

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Contatto studio

Luoghi di studio

  • Cina
    • Beijing Municipality
      • Beijing, Beijing Municipality, Cina, 100191
        • Reclutamento
        • Peking University Third Hospital
        • Contatto:

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

Da 18 anni a 80 anni (Adulto, Adulto più anziano)

Accetta volontari sani

No

Sessi ammissibili allo studio

Tutto

Descrizione

Inclusion Criteria:

  • Age 18 to 80 years.
  • A pulmonary nodule identified on preoperative high-resolution chest CT, with planned thoracoscopic wedge resection or segmentectomy.
  • Maximum target nodule diameter of 20 mm or less.
  • A pure ground-glass, part-solid (mixed ground-glass), or small solid nodule.
  • A nodule considered difficult to identify by intraoperative inspection or palpation and requiring preoperative CT-guided localization.
  • Ability to tolerate percutaneous pulmonary localization and subsequent video-assisted thoracoscopic surgery.
  • Voluntary participation and written informed consent from the participant or a legally authorized representative.

Exclusion Criteria:

  • Maximum target nodule diameter greater than 20 mm, or no need for preoperative localization in the investigator's judgment.
  • No safe puncture trajectory that avoids major vessels, the heart, mediastinum, severe bullous disease, or other important structures.
  • Severe pulmonary dysfunction that precludes percutaneous pulmonary puncture or thoracoscopic surgery.
  • Coagulation dysfunction or inability to interrupt anticoagulant or antiplatelet treatment according to clinical standards.
  • Clinically significant pneumothorax, pleural effusion, active infection, or another condition affecting safety assessment before localization.
  • Pregnancy or breastfeeding.
  • Inability to cooperate with positioning, breath-holding, or CT scanning.
  • Severe ipsilateral pleural adhesions, previous thoracic surgery, or previous radiotherapy considered to compromise localization safety.
  • Any other condition making participation unsuitable in the investigator's judgment.

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Altro
  • Assegnazione: Randomizzato
  • Modello interventistico: Assegnazione parallela
  • Mascheramento: Separare

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Sperimentale: Robot-Assisted CT-Guided Localization

Participants undergo robot-assisted CT-guided flexible guidewire localization before thoracoscopic resection. The uInterv C550-A system is used for CT-based reconstruction and trajectory planning. The physician confirms the target, entry point, angle, and depth and inserts the needle with robotic trajectory guidance. CT confirms satisfactory needle-tip placement before guidewire deployment. Final CT assesses guidewire position and complications. Both arms use the same type of flexible guidewire localization needle.
Dispositivo: Robotic puncture navigation and positioning system

The uInterv C550-A robotic puncture navigation and positioning system is used for CT-guided preoperative flexible guidewire localization of pulmonary nodules. CT images are used for three-dimensional reconstruction and trajectory planning. The physician confirms the target, skin entry point, puncture angle, and depth, and inserts the needle with robotic trajectory guidance. CT confirms satisfactory needle-tip placement before the flexible guidewire is deployed. A final CT scan assesses guidewire position and procedure-related complications. The same type of flexible guidewire localization needle is used in both groups.

Altri nomi:
  • uInterv C550-A
Comparatore attivo: Conventional Free-Hand CT-Guided Localization

Participants undergo conventional free-hand CT-guided flexible guidewire localization before thoracoscopic resection. The physician selects the skin entry point and trajectory on CT images, inserts the localization needle under local anesthesia, and adjusts the needle as needed. CT confirms satisfactory needle-tip placement before guidewire deployment. Final CT assesses guidewire position and complications. Both arms use the same type of flexible guidewire localization needle.
Procedura: Free-Hand CT-Guided Flexible Guidewire Localization

Percutaneous placement of a flexible guidewire localization needle using conventional manual trajectory planning and CT guidance before thoracoscopic resection. The physician inserts and adjusts the needle as needed. CT confirms satisfactory needle-tip placement before guidewire deployment, followed by final CT assessment.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Total Dose-Length Product
Lasso di tempo: During the localization procedure, from the first CT scan to completion of the final CT scan after guidewire deployment

Total dose-length product (DLP), measured in mGy·cm, summed across all localization-related CT acquisitions, including the initial planning CT, CT acquisitions during needle placement, and the final post-deployment CT.
During the localization procedure, from the first CT scan to completion of the final CT scan after guidewire deployment

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
First-Attempt Puncture Success Rate
Lasso di tempo: During the localization procedure

Percentage of participants with satisfactory needle-tip placement on the first puncture attempt without subsequent needle adjustment.
During the localization procedure
Technical Localization Success Rate
Lasso di tempo: From guidewire localization through completion of the subsequent thoracoscopic resection

Percentage of participants in whom flexible guidewire localization enables intraoperative identification and resection of the target pulmonary nodule during thoracoscopic surgery.
From guidewire localization through completion of the subsequent thoracoscopic resection
Localization Deviation
Lasso di tempo: During localization, on the CT scan confirming final needle-tip position before guidewire deployment

Distance in millimeters between the planned target point and the actual needle-tip position, measured on CT after needle placement.
During localization, on the CT scan confirming final needle-tip position before guidewire deployment
Number of Needle Adjustments
Lasso di tempo: During the localization procedure

Number of adjustments to needle position after the initial needle insertion during CT-guided localization.
During the localization procedure
Number of Pleural Punctures
Lasso di tempo: During the localization procedure

Number of needle punctures through the pleura during CT-guided localization.
During the localization procedure
Localization Procedure Duration
Lasso di tempo: During the localization procedure, from the first CT scan through completion of the final post-deployment CT scan

Elapsed time in minutes from the start of the first localization-related CT scan to completion of the final CT scan after flexible guidewire deployment.
During the localization procedure, from the first CT scan through completion of the final post-deployment CT scan
Number of CT Acquisitions
Lasso di tempo: During the localization procedure

Total number of CT acquisitions performed for localization, including the initial planning CT, scans during needle placement, and the final CT after guidewire deployment.
During the localization procedure
Pneumothorax Rate
Lasso di tempo: From localization through 2 months after localization

Percentage of participants with localization-related pneumothorax, assessed on post-localization CT and during follow-up.
From localization through 2 months after localization
Intrapulmonary Hemorrhage Rate
Lasso di tempo: From localization through 2 months after localization

Percentage of participants with localization-related intrapulmonary hemorrhage, assessed on post-localization CT and during follow-up.
From localization through 2 months after localization
Guidewire Dislodgement or Migration Rate
Lasso di tempo: From guidewire deployment through the subsequent thoracoscopic surgery; safety follow-up through 2 months after localization

Percentage of participants with dislodgement or migration of the localization guidewire after deployment, assessed on CT and during subsequent thoracoscopic surgery. Events are recorded during the 2-month safety follow-up; the guidewire is used for preoperative localization and is not intended to remain in place throughout follow-up.
From guidewire deployment through the subsequent thoracoscopic surgery; safety follow-up through 2 months after localization

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Peking University Third Hospital

Investigatori

  • Investigatore principale: Fuxin Guo, Peking University Third Hospital

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Effettivo)

28 ottobre 2026

Completamento primario (Stimato)

1 febbraio 2027

Completamento dello studio (Stimato)

1 aprile 2027

Date di iscrizione allo studio

Primo inviato

7 novembre 2026

Primo inviato che soddisfa i criteri di controllo qualità

7 novembre 2026

Primo Inserito (Effettivo)

13 novembre 2026

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

13 novembre 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

7 novembre 2026

Ultimo verificato

1 novembre 2026

Maggiori informazioni

Termini relativi a questo studio

Altri numeri di identificazione dello studio

  • M20260645

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

NO

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

No

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .

Sottoscrivi