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A Novel Portal Vein–Based Sub-Segmental Classification of Segment 4 and Its Application in Laparoscopic Sparing Liver Resection

A Novel Portal Vein–Based Sub-Segmental Classification of Segment 4 and Its Application in Laparoscopic Sparing Liver Resection

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
ChiCTR
Registry ID
ChiCTR2500107184
Enrollment
Unknown
Registered
2025-08-06
Start date
2025-08-10
Completion date
Unknown
Last updated
2025-08-18

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

Conditions

Liver

Interventions

Observation group:None

Sponsors

Department of Hepatobiliary Surgery, the First Hospital of Chongqing Medical University
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Inclusion criteria

Inclusion criteria: (1) Patients aged >=18 years who need CT, MRI or three-dimensional reconstruction due to diseases (such as liver tumors, hepatolithiasis, etc.); (2) CT image quality: slice thickness <=1.25 mm, intact arterial phase, portal phase and delayed phase; (3) The patient's related diseases did not accumulate liver S4 segments, and did not cause anatomical changes of S4 segments

Exclusion criteria

Exclusion criteria: (1) previous history of liver S4 surgery or interventional therapy; (2) unclear visualization of S4 portal vein due to diseases such as portal vein tumor thrombus; (3) analysis of the influence of low image resolution or motion artifacts or contrast agent extravasation in CT images.

Design outcomes

Primary

MeasureTime frame
Enhanced CT scan of the upper abdomen;—

Countries

China

Contacts

Public ContactLan Xiang

Department of Hepatobiliary Surgery, the First Hospital of Chongqing Medical University

lanxiangkeyan@163.com+86 136 2978 0427

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 4, 2026