ClinicalTrials.gg
WithdrawnNCT05575141ROCSTARUpdated Aug 7, 2026

Robotic Versus Open Comparison in the Surgical Treatment of Wide Abdominal Wall heRnias (ROCSTAR)

An interventional study of incisional hernia repair in Ventral Incisional Hernia and Abdominal Wall Hernia, sponsored by Algemeen Ziekenhuis Maria Middelares. Withdrawn. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-08-07.

Sponsored by Algemeen Ziekenhuis Maria Middelares · Not applicable, Interventional, and Treatment

Why this study was withdrawn
The study was not initiated and no participants were enrolled.
Phase
Not applicable
Study type
Interventional
Enrollment
0
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

In the treatment of ventral incisional hernias, a mesh repair in the retromuscular plane is considered as the gold standard. To allow for adequate medialization of the fascial borders and a complete closure of the defect in case of large incisional hernias, component separation techniques are increasingly being used. When compared to anterior component separation, posterior component separation by transversus abdominis release (TAR) seems to decrease postoperative wound problems. While laparoscopic techniques pose significant difficulties to perform TAR minimally invasively (mainly due to ergonomic and technical reasons), these limitations seem to be overcome by robotic platforms. Initial retrospective patient series report on significantly shorter postoperative hospital stay and fewer complications after robotic transversus abdominis release (rTAR), when compared to open transversus abdominis release (oTAR). High-quality prospective evidence on rTAR is currently lacking.

02

Conditions studied

  • Ventral Incisional Hernia
  • Abdominal Wall Hernia

Browse trials for

Keywords

  • Abdominal Wall Hernia
  • robotic TAR (rTAR)
  • open TAR (oTAR)
  • transversus abdominis release (TAR)
03

In context

Hernia, Abdominal

82 studies on the registry are indexed under Hernia, Abdominal; 19 are open to participants now.

Browse Hernia, Abdominal studies →

Lead sponsor

Algemeen Ziekenhuis Maria Middelares is the lead sponsor of 37 studies on the registry; 8 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

- All patients requiring treatment of a wide ventral incisional hernia (of more than 8 centimetres in width)

Exclusion criteria

Exclusion Criteria:

  • Pregnant or suspected pregnancy
  • Not-curatively treated , with less than 24 months
  • Patients unable to give or complete study specific questionnaires
  • Emergency surgery
  • Primary ventral hernia repair
  • Exclusively lateral hernias not involving the midline
  • Incisional hernia repair after open abdomen or enterocutaneous fistula
  • Active wound infection
  • Previous anterior or posterior component separation
  • Patients with an existing ostomy
  • Patients with a life expectancy of less than 24 months
  • Patients suspected of being unable to comply with the study protocol
Terms in these criteria, in plain language(3)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
0 participants (actual)

Study arms

  • Active comparator
    rTAR

    Patients randomized in the robotic group will undergo the technique for intra-and perioperative management for robotic complex abdominal wall repair cases as used in the center. A robotic surgical platform (da Vinci X or da Vinci Xi Surgical System, Intuitive Surgical, Aubonne, Switzerland) will be used and a retrorectus +/- retromuscular mesh placement performed. Use of component separation or not will be at the discretion of the surgeon. In principle the posterior layer and the anterior fascia will be closed avoiding a bridging technique. Drain management and mesh fixation are left to the surgeon's preference.

    Procedure: incisional hernia repair

  • Active comparator
    oTAR

    Patients randomized in the open group will undergo the technique for intra-and perioperative management for open complex abdominal wall repair cases as used in the center. A retrorectus +/- retromuscular mesh placement performed. Use of component separation or not will be at the discretion of the surgeon. In principle the posterior layer and the anterior fascia will be closed avoiding a bridging technique. Drain management and mesh fixation are left to the surgeon's preference.

    Procedure: incisional hernia repair

Interventions

  • Procedureincisional hernia repair

    Incisional hernia repair for the treatment of wide ventral incisional hernias.

06

What researchers measure

Primary outcomes

  1. Length of postoperative hospital stay

    Length of postoperative hospital stay

    Time frame: hours from the end of surgery (last skin suture) until discharge, assessed up to 20 days

Secondary outcomes

  1. Skin-to-skin operative time

    Skin-to-skin operative time from first incision until last skin suture

    Time frame: Per-operative (minutes)

  2. Conversion rate

    Conversion rate from the robotic-assisted approach to the open approach

    Time frame: Per-operative

  3. Surgical site related complications

    Surgical site infection - surgical site occurrence - surgical site occurrence requiring procedural interventions

    Time frame: 30 days

  4. Readmission rate

    Readmission rate

    Time frame: 30 Days and 3 months postoperative

  5. Post-anesthetic discharge scoring system

    Minimum score is 0, maximum score is 12. The higher the score, the better the outcome.

    Time frame: From the end of surgery (last skin suture) until discharge, assessed up to 20 days

  6. Postoperative visual analogue scale pain score

    Minimum score is 0, maximum score is 10. The higher the score, the worse the outcome.

    Time frame: From the end of surgery (last skin suture) until discharge, assessed up to 20 days

  7. EuraHS Quality of Life Scoring

    Minimum score is 0, maximum score is 90. The higher the score, the worse the outcome.

    Time frame: Preoperatively, 30 days, 3 months, 12 months, 24 months, 60 months

  8. Body Image Scale

    Minimum score is 0, maximum score is 10. A higher score means a higher level of body image disturbance (worse outcome).

    Time frame: Preoperatively, 30 days, 3 months, 12 months, 24 months, 60 months

  9. Hernia recurrence

    Hernia recurrence

    Time frame: 30 days, 3 Months, 12 months, 24 months, 60 months

  10. Reoperation for hernia recurrence or abdominal surgery not for hernia recurrence

    Reoperation for hernia recurrence or abdominal surgery not for hernia recurrence

    Time frame: 30 days, 3 Months, 12 months, 24 months, 60 months

  11. Postoperative complications

    Postoperative complications classified acoording to the Clavien-Dindo Classification

    Time frame: 30 days

  12. Reoperation rate

    Reoperation rate

    Time frame: 30 days

07

Study locations

No study locations are listed for this record.

08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Start is estimated for Jul 2025; primary completion for Jan 2028, 30 months later.

How these figures are worked out, and which studies are left out of them.

Registered
Apr 2, 2022
First posted
Oct 12, 2022
StartEst.
Jul 1, 2025
Primary completionEst.
Jan 1, 2028
CompletionEst.
Jan 1, 2033
Last update
Aug 7, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Aug 7, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05575141
Lead sponsor
Algemeen Ziekenhuis Maria Middelares
Responsible party
Filip Muysoms (Head of General Surgery, Algemeen Ziekenhuis Maria Middelares) — Principal investigator
First posted
Oct 12, 2022
Start date
Jul 1, 2025 (estimated)
Primary completion
Jan 1, 2028 (estimated)
Completion
Jan 1, 2033 (estimated)
Last update
Aug 7, 2026

Study contacts

Filip Muysoms, MD PhD
principal investigator · Clinical research center Maria Middelares

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is withdrawn, as verified in Aug 2026. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion