Clinical trial Recruiting at 10 sites Phase 3 Interventional Ages 8 and up

Laparoscopic Antibiotic Lavage to Help Prevent Abscess After Complicated Appendicitis

Official title: Laparoscopic Antibiotic Lavage to Prevent Intra-abdominal Abscess Formation in Complicated Appendicitis (ALPACA), a Multicenter Single-blinded RCT.

Run by Spaarne Gasthuis · NCT06841003 · Data updated 2026-11-12

This trial tests whether washing the abdomen with antibiotics during laparoscopic appendectomy can reduce the chance of an intra-abdominal abscess in people with complicated appendicitis.

Quick facts

PhasePhase 3
Study typeInterventional
Ages8 Years and up
SexAll
Enrollment752 (estimated)
SponsorSpaarne Gasthuis
Academic / other
Drugs / interventionschemotherapy
Locations11 sites (Heerlen, Limburg and 10 other locations)
StatusRecruiting
StartedFebruary 24, 2025
Main results expectedJune 2027
Study endsJune 2027
Registry record updatedOctober 9, 2026
Trial IDNCT06841003 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are individuals aged 8 years or older with intra-operatively confirmed complicated appendicitis undergoing laparoscopic appendectomy who can provide informed consent.

Probably not a fit

Patients without intra-abdominal abscess risk reduction or those not receiving the lavage protocol may not experience benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

In this interventional phase 3 study, patients with complicated appendicitis undergoing laparoscopic appendectomy receive laparoscopic antibiotic lavage with gentamicin and clindamycin. The aim is to see if this approach lowers the rate of postoperative intra-abdominal abscesses compared with standard care. Eligible participants are adults and children aged 8 and older with intra-operatively confirmed complicated appendicitis who can consent. Exclusion criteria include age under 8, language or consent barriers, and allergies to the study medications or excipients. The study is sponsored by Spaarne Gasthuis with collaboration from ZonMw and involves multiple Dutch centers.

Why it matters

Potential benefit: If successful, patients may have a lower risk of developing post-surgical intra-abdominal abscesses and related complications.

How similar studies have gone: Previous surgical approaches using antibiotic lavage have shown mixed results; this trial tests a specific gentamicin/clindamycin lavage in a structured phase 3 design.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* All patients ≥ 8 years with a preoperative diagnosis of acute appendicitis either with or without clinical or radiological suspicion of CA undergoing a laparoscopic appendectomy for intra-operative confirmed CA that can provide a signed written consent form.

Exclusion Criteria:

* Age under 8 years;
* Not able to give informed consent (language barrier, legally incapable)
* Any contraindication for the use of the study medication:

  * Hypersensitivity to clindamycin or to any of the excipients benzyl alcohol, sodium edetate, water, or to lincomycin;
  * Hypersensitivity to gentamicin or to sodium metabisulfite: particularly in asthmatic patients, this may trigger bronchospasms and anaphylactic shock or to any of the excipients: disodium edetate, sodium hydroxide, sodium metabisulfite (E223), water for injections;
* Severe sepsis defined as sepsis-induced tissue hypoperfusion or organ dysfunction that includes any of the following thought to be caused by the infection:

  * Sepsis-induced hypotension
  * Lactate above upper limits laboratory normal
  * Urine output \<0.5 mL/kg/h for more than 2h despite adequate fluid resuscitation
  * Acute lung injury with PaO2/FiO2 \<250 in the absence of pneumonia as infection source
  * Acute lung injury with PaO2/FiO2 \<200 in the presence of pneumonia as infection source
  * Creatinine \>2.0 mg/dL (176.8 μmol/L)
  * Bilirubin \>2mg/dL (34.2 μmol/L)
  * Platelet count \< 100,000 μL
  * Coagulopathy (international normalized ratio (INR) \> 1.5);
* ASA IV score;
* Known malignancy;
* Renal dysfunction (i.e. eGFR ≤ 60);
* Immunocompromised patients (i.e. hematological malignancies, HIV/AIDS, bone marrow transplantation, splenectomy, genetic disorders such as severe combined immunodeficiency, chemotherapy, dialysis, solid organ transplant, and immunosuppressant use (such as corticosteroids in patients with rheumatoid arthritis));
* Pregnancy;
* Known allergies to either gentamicin or clindamycin;
* Known colonization of bacteria resistant to either gentamicin or clindamycin;

Where it's running

  • Máxima MC
    Veldhoven, North Brabant, Netherlands
    Recruiting
  • Noordwest Ziekenhuisgroep
    Alkmaar, North Holland, Netherlands
    Recruiting
  • Rode Kruis Ziekenhuis
    Beverwijk, North Holland, Netherlands
    Recruiting
  • Spaarne Gasthuis
    Hoofddorp, North Holland, Netherlands
    Recruiting
  • Dijklander Ziekenhuis
    Hoorn, North Holland, Netherlands
    Recruiting
  • Zaans Medisch Centrum
    Zaandam, North Holland, Netherlands
    Recruiting
Show 5 more locations
  • Ziekenhuisgroep Twente
    Almelo, Overijssel, Netherlands
    Recruiting
  • Isala
    Zwolle, Overijssel, Netherlands
    Recruiting
  • Ijsselland Ziekenhuis
    Capelle aan den IJssel, South Holland, Netherlands
    Recruiting
  • Meander Medisch Centrum
    Amersfoort, Utrecht, Netherlands
    Recruiting
  • Zuyderland Medisch Centrum
    Heerlen, Limburg, Netherlands
    Not yet recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.