A Positioning Navigation Template for Assisting the Placement of Modular Hemipelvic Endoprostheses for Patients Undergoing Pelvic Bone Tumor Resection.

July 19, 2021 updated by: Second Affiliated Hospital, School of Medicine, Zhejiang University

A Novel Positioning Navigation Template for Accurately and Precisely Assisting the Placement of Modular Hemipelvic Endoprostheses for Patients Undergoing Pelvic Bone Tumor Resection: A Retrospective Cohort Study

Background:

Acetabular reconstruction in situ after extensive pelvic resection is technically challenging because the significant loss of bone stock and bony landmarks. The aim of the present study was to investigate the feasibility of an individualized navigation template for acetabular reconstruction following pelvic malignancy resection.

Methods:

This retrospective cohort study included patients who underwent type II or II+III pelvic tumor resection and reconstruction using a modular hemipelvic prosthesis. In the template-guided group (n = 10), a navigation template was designed and applied to assist acetabular reconstruction. In the traditional operation group (n = 14), the patients underwent the same surgery but without the navigation template. To compare the displacement of the hip rotation center before and after surgery between the two groups, an innovative method based on pelvic CT was developed and a validation group of cases was used to assess the effectiveness of this measurement approach. In the validation group (n = 12), patients undergoing periacetabular puncture or curettage without hip joint reconstruction were included. The displacements for the validation group were calculated and compared with 0 cm, the theoretical value. Subsequently, the displacements between the template-guided group and the traditional operation group were compared.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

36

Phase

  • Not Applicable

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  1. All the patients diagnosed with a pelvic tumor；
  2. Underwent limb salvage surgery following type II or II+III pelvic resection；
  3. Acetabulum reconstruction using a modular, titanium hemipelvic prosthesis.

Exclusion Criteria:

  1. A lack of postoperative CT images;
  2. Having undergone revision surgery or noninitial/primary resection;
  3. unable to calculate the hip displacement by the specific measurement method we proposed.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: the template-guided group
In the template-guided group (n = 10), a navigation template was designed and applied to assist acetabular reconstruction using a modular hemipelvic prosthesis.
Device: Acetabular reconstruction after tumor resection.
In the template-guided group (n = 10), a navigation template was designed and applied to assist acetabular reconstruction. In the traditional operation group (n = 14), the patients underwent the same surgery but without the navigation template. To compare the displacement of the hip rotation center before and after surgery between the two groups, an innovative method based on pelvic CT was developed and a validation group of cases was used to assess the effectiveness of this measurement approach. In the validation group (n = 12), patients undergoing periacetabular puncture or curettage without hip joint reconstruction were included. The displacements for the validation group were calculated and compared with 0 cm, the theoretical value. Subsequently, the displacements between the template-guided group and the traditional operation group were compared.
Active Comparator: the traditional operation group
In the traditional operation group (n = 14), acetabulum was manually reconstructed using a modular hemipelvic prosthesis by the surgeon's experience.
Device: Acetabular reconstruction after tumor resection.
In the template-guided group (n = 10), a navigation template was designed and applied to assist acetabular reconstruction. In the traditional operation group (n = 14), the patients underwent the same surgery but without the navigation template. To compare the displacement of the hip rotation center before and after surgery between the two groups, an innovative method based on pelvic CT was developed and a validation group of cases was used to assess the effectiveness of this measurement approach. In the validation group (n = 12), patients undergoing periacetabular puncture or curettage without hip joint reconstruction were included. The displacements for the validation group were calculated and compared with 0 cm, the theoretical value. Subsequently, the displacements between the template-guided group and the traditional operation group were compared.
Sham Comparator: the validation group
In the validation group (n = 12), patients undergoing periacetabular puncture or curettage without acetabulum reconstruction.
Device: Acetabular reconstruction after tumor resection.
In the template-guided group (n = 10), a navigation template was designed and applied to assist acetabular reconstruction. In the traditional operation group (n = 14), the patients underwent the same surgery but without the navigation template. To compare the displacement of the hip rotation center before and after surgery between the two groups, an innovative method based on pelvic CT was developed and a validation group of cases was used to assess the effectiveness of this measurement approach. In the validation group (n = 12), patients undergoing periacetabular puncture or curettage without hip joint reconstruction were included. The displacements for the validation group were calculated and compared with 0 cm, the theoretical value. Subsequently, the displacements between the template-guided group and the traditional operation group were compared.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Compare the change of acetabular rotation center before and after surgery between the template-guided group and the traditional operation group.
Time Frame: "through study completion, an average of 2 years"
Compare the change of acetabular rotation center (the displacement displayed in centimeters) before and after surgery between the template-guided group and the traditional operation group based on preoperative and postoperative CT images.
"through study completion, an average of 2 years"

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Second Affiliated Hospital, School of Medicine, Zhejiang University

Investigators

  • Study Director: Nong Lin, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, China
  • Principal Investigator: Donghua Huang, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, China

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 1, 2013

Primary Completion (Actual)

July 31, 2020

Study Completion (Actual)

July 31, 2020

Study Registration Dates

First Submitted

May 30, 2021

First Submitted That Met QC Criteria

July 19, 2021

First Posted (Actual)

July 28, 2021

Study Record Updates

Last Update Posted (Actual)

July 28, 2021

Last Update Submitted That Met QC Criteria

July 19, 2021

Last Verified

May 1, 2021

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2020-453

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

No

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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