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Femoral and Sciatic Nerve Blocks Added to Obturator Nerve Block for Prevention of Obturator Reflex

2 november 2026 bijgewerkt door: Tuna Erturk

Comparison of the Efficacy of Femoral and Sciatic Nerve Blocks Added to Obturator Nerve Block in Preventing the Obturator Reflex

This prospective, randomized controlled study aims to evaluate whether adding femoral and sciatic nerve blocks to obturator nerve block improves the prevention of obturator reflex during transurethral resection of bladder tumors under spinal anesthesia.

Ninety patients will be randomly assigned to three groups: obturator nerve block alone, obturator plus femoral nerve blocks, or obturator plus femoral and sciatic nerve blocks. Adductor muscle contractions, surgeon satisfaction, procedure duration, and complications will be evaluated.

Studie Overzicht

Toestand

Nog niet aan het werven

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

This single-center, prospective, randomized controlled study will include 90 patients aged 18-90 years with American Society of Anesthesiologists (ASA) physical status I-III who are scheduled for transurethral resection of unilateral lateral bladder wall tumors under spinal anesthesia.

Eligible patients will be randomly allocated into three groups of 30 patients each:

Group 1: Obturator nerve block (ONB) alone.

Group 2: Obturator nerve block combined with femoral nerve block (ONB + FNB).

Group 3: Obturator nerve block combined with femoral and sciatic nerve blocks (ONB + FNB + SNB).

The nerve blocks will be performed using ultrasound guidance according to the study protocol.

During surgery, the occurrence and severity of adductor muscle contractions associated with the obturator reflex will be recorded. Contractions will be classified as absent, mild, or severe according to their interference with the surgical procedure. The total number of contractions will also be documented.

Additional assessments will include block procedure duration, surgical duration, surgeon satisfaction using a 0-10 numerical scale, conversion to general anesthesia, bleeding, bladder injury, perforation, blood transfusion, and complications related to the nerve blocks.

The study aims to determine whether adding femoral and sciatic nerve blocks to obturator nerve block improves the prevention of obturator reflex during transurethral bladder tumor resection.

Studietype

Ingrijpend

Inschrijving (Geschat)

90

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Locaties

  • Turkije (Türkiye)
      • Istanbul, Turkije (Türkiye), 34668
        • Sultan 2. Abdulhamid Han Training and Research Hospital
        • Contact:

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

18 jaar tot 90 jaar (Volwassen, Oudere volwassene)

Accepteert gezonde vrijwilligers

Nee

Geslachten die in aanmerking komen voor studie

Allemaal

Beschrijving

Inclusion Criteria:

  • Patients aged 18-90 years.
  • American Society of Anesthesiologists (ASA) physical status I-III.
  • Patients scheduled for transurethral resection of unilateral lateral or inferolateral bladder wall tumors under spinal anesthesia.
  • Patients providing informed consent personally or through a legally authorized representative.
  • No known hypersensitivity to the medications used in the study.
  • No infection or anatomical deformity at the nerve block sites.
  • No antithrombotic treatment and normal coagulation parameters.

Exclusion Criteria:

  • Age younger than 18 or older than 90 years.
  • ASA physical status IV or higher.
  • Absence of informed consent.
  • Hypersensitivity to the study medications or their components.
  • Infection or anatomical deformity at the nerve block sites.
  • Antithrombotic treatment.
  • Abnormal coagulation parameters.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Preventie
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Dubbele

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Actieve vergelijker: Obturator Nerve Block (ONB)

Patients will receive an ultrasound-guided obturator nerve block.
Procedure: Obturator Nerve Block

Ultrasound-guided obturator nerve block will be performed.
Experimenteel: ONB + FNB

Patients will receive ultrasound-guided obturator and femoral nerve blocks.
Procedure: Obturator Nerve Block

Ultrasound-guided obturator nerve block will be performed.

Procedure: Femoral Nerve Block

Ultrasound-guided femoral nerve block will be performed in addition to obturator nerve block.
Experimenteel: ONB + FNB + SNB

Patients will receive ultrasound-guided obturator, femoral, and sciatic nerve blocks.
Procedure: Obturator Nerve Block

Ultrasound-guided obturator nerve block will be performed.

Procedure: Femoral Nerve Block

Ultrasound-guided femoral nerve block will be performed in addition to obturator nerve block.

Procedure: Sciatic Nerve Block

Ultrasound-guided sciatic nerve block will be performed in addition to obturator and femoral nerve blocks.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Number of Participants With at Least One Intraoperative Adductor Muscle Contraction
Tijdsspanne: On the day of surgery, during transurethral tumor resection

Participants experiencing at least one adductor muscle contraction during transurethral bladder tumor resection will be recorded. The number and proportion of affected participants will be compared across the three groups.
On the day of surgery, during transurethral tumor resection

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Number of Participants With Severe Intraoperative Adductor Muscle Contractions
Tijdsspanne: On the day of surgery, during transurethral tumor resection

Adductor muscle contractions will be classified as severe if they interfere with the surgeon during resection. The number of participants experiencing at least one severe contraction will be recorded and compared across the three groups.
On the day of surgery, during transurethral tumor resection
Surgeon Satisfaction Score
Tijdsspanne: At the end of surgery, on the day of the procedure

Surgeon satisfaction will be assessed using a numerical rating scale from 0 (very poor) to 10 (excellent). Scores will be compared across the three groups.
At the end of surgery, on the day of the procedure
Total Number of Intraoperative Adductor Muscle Contractions
Tijdsspanne: On the day of surgery, during transurethral tumor resection

The total number of adductor muscle contractions occurring during transurethral bladder tumor resection will be recorded for each participant and compared across the three groups.
On the day of surgery, during transurethral tumor resection
Number of Participants With Bladder Wall Injury or Perforation
Tijdsspanne: On the day of surgery, during transurethral tumor resection

The occurrence of bladder wall injury or perforation during transurethral bladder tumor resection will be recorded and compared across the three groups.
On the day of surgery, during transurethral tumor resection
Number of Participants With Inability to Continue Surgery Due to Adductor Muscle Contraction
Tijdsspanne: On the day of surgery, during transurethral tumor resection

Inability to continue surgical resection due to intraoperative adductor muscle contraction will be recorded and compared across the three groups.
On the day of surgery, during transurethral tumor resection

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Tuna Erturk

Onderzoekers

  • Hoofdonderzoeker: Tuna Ertürk, MD, University of Health Sciences Sultan 2. Abdulhamid Han Training and Research Hospital

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Geschat)

2 november 2026

Primaire voltooiing (Geschat)

2 februari 2027

Studie voltooiing (Geschat)

2 februari 2027

Studieregistratiedata

Eerst ingediend

2 november 2026

Eerst ingediend dat voldeed aan de QC-criteria

2 november 2026

Eerst geplaatst (Werkelijk)

6 november 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

6 november 2026

Laatste update ingediend die voldeed aan QC-criteria

2 november 2026

Laatst geverifieerd

1 november 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Andere studie-ID-nummers

  • 20-115

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

NEE

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

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