An interventional study of Algosteril TM and Sorbact TM in Sinus Pilonidal, sponsored by University Hospital, Strasbourg, France. Completed at 4 sites in France. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-01-20.
Sponsored by University Hospital, Strasbourg, France · Not applicable, Interventional, and Treatment
Sinus pilonidal concern 26/100 000 young adults. It manifests after puberty, presenting as an acute abscess in approximately 50% of patients or as a discharging painful sinus. Patients may experience lengthy healing times resulting in considerable morbidity and disruption to a young adult's life. Eradication of pilonidal sinus is based on a wide surgical excision and at the end of the procedure, the wound is dressed with an alginate dressing (Algosteril®).
The objective is to show a better efficiency of Sorbact TM (trademark) dressings compared to Alginates that are standardized dressings after pilonidal sinus excision during a period of 75 days. The main objective is to show a difference of 20% of wounds completely healed in 75 days between the two types of dressing: 50% of wounds healed with Algosteril TM compared to 70% of wounds healed with Sorbact TM.
109 studies on the registry are indexed under Pilonidal Sinus; 32 are open to participants now.
This study's enrollment of 251 is above the median of 80 across 72 interventional studies indexed under Pilonidal Sinus.
Browse Pilonidal Sinus studies →University Hospital, Strasbourg, France is the lead sponsor of 999 studies on the registry; 358 are open to participants now.
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Having a pilonidal sinus:
Exclusion Criteria:
Patients with concomitant pathology:
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.
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.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Calcium alginate dressings are made from seaweed. Calcium alginate dressings form a natural gel of the exudates against the healing tissue that keeps it moist and supple, aiding in healing and tissue growth. In addition, this gel material forms a natural barrier to bacteria that may complicate healing with secondary infections of the wound. Alginates are the reference of dressing after sinus pilonidal excision.
Device: Algosteril TM
DACC (dialkylcarbamoyle chloride) is a main component of the bacterial binding wound dressing: Sorbact. DACC is a hydrophobic fatty acid derivative that can be used to coat dressing materials, resulting in a dressing with highly hydrophobic pathogen binding properties. This is a primary wound interface dressing and is effective when in close contact with the wound bed in a moist environment.
Device: Sorbact TM
Percentage of wounds healed
Time frame: 75 days after surgery
Total surface area measure of non-healed wounds
Time frame: 75 days after surgery
VAS pain
Time frame: every 2 weeks, from randomization up to 4 months or date of healing, whichever comes first
analgesic use
Time frame: every 2 weeks, from randomization up to 4 months or date of healing, whichever comes first
antibiotics use
Time frame: every 2 weeks, from randomization up to 4 months or date of healing, whichever comes first
number of dressings used
Time frame: every 2 weeks, from randomization up to 4 months or date of healing, whichever comes first
Plan to share: No
Ran from Dec 2013 to primary completion in Sep 2017, 45 months.
Of 35 interventional studies with no phase under Pilonidal Sinus, half reached primary completion within 24 months of starting (the median), counting those still running; a quarter within 11 and three quarters within 35. This study's 45 months is above that.
How these figures are worked out, and which studies are left out of them.
This study is completed, as verified in Jan 2026. You cannot join it, but the record below documents what was studied.
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University Hospital, Strasbourg, France →