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Cervical Lymphatic Microsurgery in Alzheimer's Disease

5. oktober 2026 oppdatert av: Daniel Maliszewski

Microsurgical Modification of Cervical Lymphatic Pathways in Alzheimer's Disease: A Pilot Study

This pilot study will evaluate whether microsurgical modification of cervical lymphatic drainage may influence blood biomarkers and clinical outcomes in people with mild Alzheimer's disease.

Thirty participants will be randomly assigned in a 1:1 ratio to either a surgical intervention group or a control group. Participants in the intervention group will undergo supermicrosurgical lymphaticovenous anastomosis (LVA) and/or lymph node-to-vein anastomosis (LNVA) in the neck to create an alternative pathway for lymphatic drainage. The procedure may be performed manually or with robotic microsurgical assistance. Participants in the control group will receive clinical observation without surgery during the first 12 months.

The primary objective is to assess the change in plasma phosphorylated tau 217 (p-tau217) from baseline to 12 months. The study will also assess changes in cognitive and functional measures, including the Clinical Dementia Rating Sum of Boxes (CDR-SB), Alzheimer's Disease Cooperative Study-Activities of Daily Living (ADCS-ADL), Montreal Cognitive Assessment (MoCA), and Mini-Mental State Examination (MMSE), as well as the feasibility and safety of the surgical procedure.

Participants will be assessed at baseline and at 3, 6, and 12 months. After completion of the 12-month observation period, participants in the control group may be offered the surgical procedure if they wish to undergo it.

Studieoversikt

Status

Rekruttering

Forhold

Intervensjon / Behandling

Studietype

Intervensjonell

Registrering (Antatt)

30

Fase

  • Ikke aktuelt

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

Studer Kontakt Backup

Studiesteder

  • Polen
      • Gdansk, Polen, 80-952
        • Rekruttering
        • Uniwersyteckie Centrum Kliniczne w Gdańsku
        • Ta kontakt med:
        • Hovedetterforsker:
          • Kamil Chwojnicki, MD, PhD
      • Słupsk, Polen, 76-200
        • Rekruttering
        • Wojewódzki Szpital Specjalistyczny im. Janusza Korczaka w Słupsku Sp. z o.o.
        • Ta kontakt med:
        • Hovedetterforsker:
          • Daniel Maliszewski, MD, PhD

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

18 år og eldre (Voksen, Eldre voksen)

Tar imot friske frivillige

Nei

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

Inclusion Criteria:

  • Age 18 years or older
  • Clinical diagnosis of mild Alzheimer's disease according to National Institute on Aging-Alzheimer's Association (NIA-AA) criteria.
  • Clinical Dementia Rating (CDR) score of 0.5 to 1.0.
  • Mini-Mental State Examination (MMSE) score of 20 to 26.
  • Confirmation of Alzheimer's disease pathology using plasma biomarkers, with elevated phosphorylated tau 217 (p-tau217).
  • Stable pharmacological treatment for Alzheimer's disease for at least 3 months before enrollment.
  • Ability to provide informed consent or consent provided by a legally authorized representative.

Exclusion Criteria:

  • Moderate or severe Alzheimer's disease.
  • Other neurodegenerative disorders or significant psychiatric disorders.
  • Previous major neck surgery or radiotherapy to the neck that may affect lymphatic drainage.
  • Contraindications to general anesthesia.
  • Active infection or coagulation disorders.

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Grunnvitenskap
  • Tildeling: Randomisert
  • Intervensjonsmodell: Parallell tildeling
  • Masking: Enkelt

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: Surgical Intervention

Participants assigned to this arm will undergo supermicrosurgical modification of cervical lymphatic drainage using lymphaticovenous anastomosis (LVA) and/or lymph node-to-vein anastomosis (LNVA). The procedure may be performed manually or with robotic microsurgical assistance.
Fremgangsmåte: Cervical Lymphatic Microsurgery

Supermicrosurgical modification of cervical lymphatic drainage by creation of lymphaticovenous anastomosis (LVA) and/or lymph node-to-vein anastomosis (LNVA). Preoperative lymphatic and venous mapping is performed using ultra-high-frequency ultrasound and indocyanine green fluorescence imaging. The procedure is performed under general anesthesia and may be carried out manually or with robotic supermicrosurgical assistance. The specific anastomotic technique and configuration are selected according to the identified lymphatic and venous anatomy.

Andre navn:
  • Lymph Node-to-Vein Anastomosis (LNVA)
  • Lymphaticovenous Anastomosis (LVA)
Ingen inngripen: Control

Participants assigned to this arm will undergo clinical observation without surgical intervention during the first 12 months. After completion of the 12-month observation period, participants may elect to undergo the surgical procedure.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Change in Plasma Phosphorylated Tau 217 (p-tau217) Concentration From Baseline to Month 12
Tidsramme: Baseline to Month 12

Change in plasma phosphorylated tau 217 (p-tau217) concentration from baseline to the 12-month follow-up. The change over time will be compared between the surgical intervention and control groups.
Baseline to Month 12

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Change in CDR-SB Score From Baseline to Month 12
Tidsramme: Baseline to Month 12

The Clinical Dementia Rating Sum of Boxes (CDR-SB) score ranges from 0 to 18, with higher scores indicating greater cognitive and functional impairment and therefore a worse clinical outcome. Change in CDR-SB score from baseline to Month 12 will be compared between the surgical intervention and control groups. A positive change from baseline indicates worsening, whereas a negative change indicates improvement.
Baseline to Month 12
Change in ADCS-ADL Score From Baseline to Month 12
Tidsramme: Baseline to Month 12

The 23-item Alzheimer's Disease Cooperative Study-Activities of Daily Living (ADCS-ADL) total score ranges from 0 to 78, with higher scores indicating better performance in activities of daily living and therefore a better functional outcome. Change in ADCS-ADL total score from baseline to Month 12 will be compared between the surgical intervention and control groups. A positive change from baseline indicates improvement, whereas a negative change indicates worsening.
Baseline to Month 12
Change in MoCA Score From Baseline to Month 12
Tidsramme: Baseline to Month 12

The Montreal Cognitive Assessment (MoCA) total score ranges from 0 to 30, with higher scores indicating better cognitive performance and therefore a better cognitive outcome. Change in MoCA total score from baseline to Month 12 will be compared between the surgical intervention and control groups. A positive change from baseline indicates improvement, whereas a negative change indicates worsening.
Baseline to Month 12
Change in MMSE Score From Baseline to Month 12
Tidsramme: Baseline to Month 12

The Mini-Mental State Examination (MMSE) total score ranges from 0 to 30, with higher scores indicating better cognitive performance and therefore a better cognitive outcome. Change in MMSE total score from baseline to Month 12 will be compared between the surgical intervention and control groups. A positive change from baseline indicates improvement, whereas a negative change indicates worsening.
Baseline to Month 12
Procedure-Related Adverse Events and Serious Adverse Events
Tidsramme: From surgery through Month 12

Occurrence of adverse events and serious adverse events related to the surgical procedure during the study follow-up period.
From surgery through Month 12
Postoperative Complications
Tidsramme: From surgery through Month 12

Occurrence of postoperative complications following cervical lymphatic microsurgery, including local surgical complications assessed during follow-up.
From surgery through Month 12
Rehospitalization
Tidsramme: Up to Month 12

Occurrence of rehospitalization during the 12-month study follow-up period.
Up to Month 12
All-Cause Mortality
Tidsramme: Up to Month 12

Occurrence of death from any cause during the 12-month study follow-up period.
Up to Month 12

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Daniel Maliszewski

Samarbeidspartnere

University Clinical Centre, Gdansk
Janusz Korczak Provincial Specialist Hospital in Słupsk

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Antatt)

1. september 2026

Primær fullføring (Antatt)

1. mai 2029

Studiet fullført (Antatt)

1. mai 2029

Datoer for studieregistrering

Først innsendt

29. september 2026

Først innsendt som oppfylte QC-kriteriene

29. september 2026

Først lagt ut (Faktiske)

5. oktober 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

8. oktober 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

5. oktober 2026

Sist bekreftet

1. oktober 2026

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • AD-LVA-LNVA-2026-01

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

NEI

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

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