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Risk Factors Analysis of Failed Localization of Inaccessible Pulmonary Nodules Using Watershed Analysis and Construction of a Nomogram Prediction Model

Risk Factors Analysis of Failed Localization of Inaccessible Pulmonary Nodules Using Watershed Analysis and Construction of a Nomogram Prediction Model

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
ChiCTR
Registry ID
ChiCTR2600118756
Enrollment
Unknown
Registered
2026-02-10
Start date
2026-03-01
Completion date
Unknown
Last updated
2026-02-16

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Pulmonary Nodules

Interventions

Sponsors

The Affiliated People’s Hospital of Ningbo University
Lead Sponsor

Eligibility

Sex/Gender
All
Age
20 Years to 80 Years

Inclusion criteria

Inclusion criteria: 1. Peripheral pulmonary nodules confirmed by chest high-resolution CT (located in the outer 1/3 of the lung field), with a diameter of 8–20 mm; 2. Preoperative clinical suspicion of early-stage lung cancer (ground-glass component proportion >=50% or nodule doubling time >=400 days); 3. Attempted localization using watershed analysis and video-assisted thoracoscopic wedge resection; 4. Complete clinical, imaging, and follow-up data.

Exclusion criteria

Exclusion criteria: 1. Severe underlying diseases (e.g., heart failure) that preclude tolerance of surgery; 2. Intraoperative change of surgical approach (conversion to thoracotomy or performance of lobectomy/segmentectomy, etc.); 3. Incomplete clinical data.

Design outcomes

Primary

MeasureTime frame
nodule position;tissue adhesion;Whether there is vascular variation;Whether the pulmonary fissure is fully developed;Whether there is a history of COPD;area under the curve; AUC;

Countries

China

Contacts

Public ContactKang Wang

The Affiliated People’s Hospital of Ningbo University

13123830903@163.com+86 574 8710 6919

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 19, 2026