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Swedish National Parotidectomy Study (SNaPs): Drainless Versus Standard Surgery (SNaPs)

2. Juni 2026 aktualisiert von: Karl Sandström, Uppsala University Hospital

A Prospective, Randomized, Multicenter Non-Inferiority Trial Evaluating the Safety of Parotidectomy Without Active Surgical Drainage (Svenska Nationella Parotisstudien)

The purpose of this study The purpose of this study is to find out if it is safe to perform surgery on the parotid gland (the large salivary gland in front of the ear) without using a wound drain. A wound drain is a small plastic tube used to remove excess fluid from the surgical site after the operation. Currently, using a drain is the standard practice in Sweden, which often means patients must stay in hospital overnight. Researchers want to see if skipping the drain is just as safe and if it could allow more patients to return home on the same day as their surgery.

What happens during the study

Participants in this study will be randomly assigned to one of two groups during their surgery:

Group 1: Will receive the standard treatment with a wound drain.

Group 2: Will have the surgery performed without a wound drain.

Apart from the use of a drain, all participants will receive the same surgical care. After the operation, researchers will monitor the healing process. Participants will be asked to fill out questionnaires about their health and any symptoms at one week and six months after their surgery.

The goal of the study The main goal is to compare the safety of the two methods. Researchers will look at whether there is any difference in the number of complications, such as fluid build-up (seroma), bleeding, or infections, between those who had a drain and those who did not. The study also aims to evaluate if avoiding a drain improves the patient's quality of life and if it is a more cost-effective approach for the healthcare system.

Studienübersicht

Studientyp

Interventionell

Einschreibung (Geschätzt)

600

Phase

  • Unzutreffend

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

Studienorte

      • Stockholm, Schweden
        • Rekrutierung
        • Karolinska University Hospital
      • Trollhättan, Schweden
        • Rekrutierung
        • NÄL
      • Uppsala, Schweden
        • Rekrutierung
        • Uppsala University Hospital, Department of Otorhinolaryngology
        • Kontakt:

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

  • Erwachsene
  • Älterer Erwachsener

Akzeptiert gesunde Freiwillige

Nein

Beschreibung

Inclusion Criteria:

  • Patients scheduled to undergo partial or superficial parotidectomy without concurrent soft tissue surgery, in cases where a wound drain is traditionally used (extirpation of single adjacent lymph nodes is acceptable).
  • ASA physical status class 1-3.
  • Aged 18 years or older.
  • The patient understands the participant information and is able to make an informed choice.

Exclusion Criteria:

  • Previous parotid surgery on the same side
  • Tumour with parapharyngeal extension.
  • Ongoing or planned perioperative treatment with tranexamic acid.
  • Ongoing treatment with dual antiplatelet therapy (single agent therapy, such as Aspirin or Clopidogrel, is not an exclusion criterion).
  • Ongoing treatment with anticoagulants (NOAC, Warfarin) at the time of surgery. NOAC must be discontinued at least 24 hours before surgery.
  • Ongoing treatment with low molecular weight heparin in doses higher than: Fragmin 5000 IU/day, Clexane 40 mg/day, or Innohep 4500 IU/day.Ongoing treatment for malignancy.Known coagulation disorder.
  • Platelet count <150 x 10⁹
  • PK-INR >1.2.
  • Hb <120 g/L.
  • APTT >42s.
  • Preoperative impaired facial nerve function on the affected side (Sunnybrook Facial Grading System score <90).
  • Supplementary postoperative treatment such as radiotherapy or extended surgery.

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Versorgungsforschung
  • Zuteilung: Zufällig
  • Interventionsmodell: Parallele Zuordnung
  • Maskierung: Keine (Offenes Etikett)

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: Drainless Group (Intervention)
Participants in this group will undergo partial or superficial parotidectomy without the placement of a postoperative active wound drain. The surgical site is closed according to the standard technique, but the suction drain is omitted.
The surgical procedure is performed without the insertion of an active suction drain. All other aspects of the surgical care and postoperative monitoring follow standard protocols.
Aktiver Komparator: Standard Drain Group (Control)
Participants in this group will undergo partial or superficial parotidectomy with the placement of a postoperative active wound drain, according to current standard clinical routine in Sweden.
An active suction drain is placed in the surgical bed before wound closure, which is the current established clinical practice for parotidectomy in Sweden.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Cumulative incidence of early postoperative complications requiring intervention
Zeitfenster: From the day of surgery up to 7 weeks postoperatively.
The primary outcome is the number of participants experiencing at least one early complication, defined as a salivary fistula, haematoma, seroma/sialocele, or surgical site infection that requires invasive or medical treatment (e.g., aspiration, re-operation, or antibiotics).
From the day of surgery up to 7 weeks postoperatively.

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Requirement for inpatient hospital care after the day of surgery.
Zeitfenster: From the first postoperative day up to 6 months
Evaluation of the number of participants requiring unplanned hospital admission or prolonged stay related to the surgical procedure.
From the first postoperative day up to 6 months
Postoperative facial nerve function.
Zeitfenster: Baseline (preoperative), at discharge, at 7 weeks, and at 6 months
Assessment of facial nerve function using the Sunnybrook Facial Grading System (SFGS). The SFGS is a clinical evaluation scale that ranges from 0 to 100. A score of 0 indicates complete facial paralysis, while a score of 100 represents normal facial function. Higher scores indicate a better outcome (better facial nerve function).
Baseline (preoperative), at discharge, at 7 weeks, and at 6 months
Incidence of Frey's syndrome
Zeitfenster: 6 months postoperatively.
Subjective and objective assessment of gustatory sweating (Frey's syndrome).
6 months postoperatively.
Health-related quality of life (EQ-5D-5L)
Zeitfenster: 7 weeks, and 6 months postoperatively
Evaluated using the EQ-5D-5L descriptive system, which comprises 5 dimensions (mobility, self-care, usual activities, pain/discomfort, anxiety/depression). Each dimension is scored from 1 (no problems) to 5 (extreme problems). The digits are combined into a 5-digit health state profile, which is then converted into a single index value. Index values range from less than 0 (where 0 is a state equivalent to death and negative values are states worse than death) to 1.0 (perfect health). Higher scores indicate a better quality of life outcome.
7 weeks, and 6 months postoperatively
Postoperative length of stay
Zeitfenster: Through initial hospital discharge, an average of 1.5 days, assessed up to 7 weeks.
Total number of days spent in hospital following the surgical procedure.
Through initial hospital discharge, an average of 1.5 days, assessed up to 7 weeks.
Symptom-specific outcomes (SwPOI-8)
Zeitfenster: 7 weeks and 6 months postoperatively
Measured using the Swedish Parotidectomy Outcome Inventory 8 (SwPOI-8), a disease-specific instrument assessing subjective symptoms after parotid surgery (e.g., pain, sensory disturbances, scarring, facial palsy, sweating, dry mouth). Each of the 8 items is scored on a Likert scale from 0 to 3, with a total score ranging from 0 to 24. Higher scores indicate a greater symptom burden and a worse outcome.
7 weeks and 6 months postoperatively

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Tatsächlich)

6. Mai 2026

Primärer Abschluss (Geschätzt)

1. Dezember 2030

Studienabschluss (Geschätzt)

1. Dezember 2032

Studienanmeldedaten

Zuerst eingereicht

19. Mai 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

26. Mai 2026

Zuerst gepostet (Tatsächlich)

2. Juni 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

4. Juni 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

2. Juni 2026

Zuletzt verifiziert

1. Juni 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

NEIN

Beschreibung des IPD-Plans

Individual participant data will not be shared publicly due to current Swedish legislation and the European General Data Protection Regulation (GDPR), which protect the privacy of study participants. Sharing of pseudonymised individual-level data would require specific legal review and institutional agreements to ensure continued data protection

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

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