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Active, not recruitingNCT02174926LASERUpdated Aug 24, 2020

LASER Trial. LAparoscopic Elective Sigmoid Resection Following divERticulitis - a Multicenter, Prospective, Randomized Clinical Trial

An interventional study of Elective laparoscopic sigmoid resection and Conservative treatment in Diverticulum and Colon, Sigmoid, sponsored by Helsinki University Central Hospital. Active, not recruiting at 11 sites in Finland. Open to participants aged 18 Years to 75 Years. Per ClinicalTrials.gov, last updated 2020-08-24.

Sponsored by Helsinki University Central Hospital · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
133
Allocation
Randomized
Ages
18 Years to 75 Years
Sex
All
01

Study summary

The purpose of this study is to find out whether elective sigmoid resection will improve quality of life compared to conservative treatment with lifestyle guidance and fiber supplement in patients with a recurrent or complicated diverticulitis.

02

Conditions studied

  • Diverticulum
  • Colon, Sigmoid

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03

In context

Diverticulum

22 studies on the registry are indexed under Diverticulum; 3 are open to participants now.

This study's planned enrollment of 133 is close to the median of 131 across 16 interventional studies indexed under Diverticulum.

Browse Diverticulum studies →

Lead sponsor

Helsinki University Central Hospital is the lead sponsor of 311 studies on the registry; 61 are open to participants now.

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

04

Who can participate

Ages eligible
18 Years to 75 Years
Sexes eligible
All

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

  • Recurrent left colon diverticulitis (minimum 3 within 2 years, at least 1 confirmed with CT)

OR

  • Earlier complicated left colon diverticulitis

OR

  • Prolonged (over 3 months) pain or disturbance in bowel habits after a CT-confirmed left colon diverticulitis

Exclusion criteria

Exclusion Criteria:

  • Multimorbidity that prevents elective surgery
  • to laparoscopy
  • Colonic stricture
  • Fistula (e.g. colocutaneous, colovaginal, colovesical)
  • Active
  • Earlier resection of sigmoid colon or rectum
  • Acute diverticulitis that has not settled
  • Colonoscopy/sigmoidoscopy/virtual colonoscopy not performed within 2 years
  • Age \< 18 or > 75 years
  • Pregnancy
  • Inability to answer health surveys (e.g. dementia, psychiatric condition)
Terms in these criteria, in plain language(2)

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.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

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.

05

Study design

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

Study arms

  • Active comparator
    Conservative treatment

    Written lifestyle guidance and fiber supplements

    Dietary Supplement: Conservative treatment

  • Experimental
    Elective laparoscopic sigmoid resection

    Procedure: Elective laparoscopic sigmoid resection

Interventions

  • ProcedureElective laparoscopic sigmoid resection
  • Dietary supplementConservative treatment

    Written lifestyle guidance and fiber supplements

06

What researchers measure

Primary outcomes

  1. Gastrointestinal quality of life-index change at 6 months

    Difference in gastrointestinal quality of life-index (GIQLI) at randomization and 6 months from randomization.

    Time frame: 6 months from randomization

Secondary outcomes

  1. GIQLI at 12, 24, 48, and 96 months

    Time frame: 12, 24, 48, and 96 months from randomization

  2. Short form (SF) 36 Health survey score at 6, 12, 24, 48, and 96 months

    Time frame: 6, 12, 24, 48, and 96 months from randomization

  3. Recurrence and severity of recurrent diverticulitis

    Time frame: 0 - 96 months from randomization

  4. Need of emergency surgery due to diverticulitis

    Whether or not patient has undergone emergency surgery due to diverticulitis during follow-up period. Assessment will be carried out by patient questionnaire and search for patient records.

    Time frame: 0 - 96 months from randomization

  5. Need of elective sigmoid resection due to diverticulitis (conservative arm)

    Whether or not patient has undergone elective sigmoid resection due to diverticulitis during follow-up period. Assessment will be carried out by patient questionnaire and search for patient records.

    Time frame: 0 - 96 months from randomization

  6. Complications due to elective sigmoid resection

    Time frame: 0 - 96 months from randomization

  7. Mortality

    Time frame: 0 - 96 months

  8. Complications of diverticular disease

    Time frame: 0 - 96 months

  9. Stoma rate

    Time frame: 0 - 96 months from randomization

07

Study locations

11 sites
08

References and documents

Publications

  • Santos A, Mentula P, Pinta T, Ismail S, Rautio T, Juusela R, Lahdesmaki A, Scheinin T, Sallinen V. Comparing Laparoscopic Elective Sigmoid Resection With Conservative Treatment in Improving Quality of Life of Patients With Diverticulitis: The Laparoscopic Elective Sigmoid Resection Following Diverticulitis (LASER) Randomized Clinical Trial. JAMA Surg. 2021 Feb 1;156(2):129-136. doi: 10.1001/jamasurg.2020.5151. PubMed 33206182 ↗
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 24, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT02174926
Responsible party
Ville Sallinen (M.D., Ph.D., Helsinki University Central Hospital) — Principal investigator
First posted
Jun 26, 2014
Start date
Sep 2014
Primary completion
Apr 2019
Completion
Dec 2027 (estimated)
Last update
Aug 24, 2020

Study contacts

Ville Sallinen, M.D., Ph.D.
principal investigator · Helsinki University Central Hospital
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is active, not recruiting, as verified in Aug 2020. You cannot join it, but the record below documents what was studied.

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