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Autonomic and Immune Effects of Regional Anesthesia in Total Hip Arthroplasty (PENG neuromodu)

3 november 2026 bijgewerkt door: Poznan University of Medical Sciences

Effects of Three Regional Anesthesia Strategies on Autonomic Regulation, Systemic Inflammatory Response, and Postoperative Recovery Following Elective Total Hip Arthroplasty: A Prospective Randomized Double-Blind Trial

Surgical trauma activates the sympathetic nervous system and induces a systemic inflammatory response, both of which may adversely affect postoperative recovery. Regional anesthesia has traditionally been used for perioperative analgesia; however, emerging evidence suggests that peripheral nerve blocks may also modulate autonomic and immune pathways. This prospective randomized double-blind trial aims to compare three regional anesthesia strategies in patients undergoing elective total hip arthroplasty under spinal anesthesia and to determine their effects on autonomic regulation, systemic inflammatory response, postoperative pain, opioid consumption, quality of recovery, and early functional outcomes.

Studie Overzicht

Toestand

Nog niet aan het werven

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

Total hip arthroplasty (THA) is associated with substantial surgical trauma, resulting in activation of the sympathetic nervous system and a systemic inflammatory response that may contribute to postoperative pain, delayed functional recovery, and perioperative complications. Although regional anesthesia techniques are widely used to improve postoperative analgesia, increasing evidence suggests that they may also influence autonomic regulation and neuroimmune interactions beyond their analgesic effects. The extent to which different regional anesthesia strategies modify perioperative autonomic and inflammatory responses remains incompletely understood.

This prospective, randomized, double-blind, controlled trial aims to compare three regional analgesic strategies in patients undergoing elective primary total hip arthroplasty under spinal anesthesia: ultrasound-guided pericapsular nerve group (PENG) block, local infiltration analgesia (LIA), and the combination of PENG block with LIA. All patients will receive standardized perioperative anesthetic and multimodal analgesic management, with the regional analgesic technique being the only study intervention.

The primary objective is to determine whether different regional anesthesia strategies differentially influence perioperative autonomic regulation and systemic inflammatory response. Autonomic function will be assessed using perioperative hemodynamic parameters and vasopressor requirements, while systemic inflammatory activation will be evaluated using routinely available inflammatory biomarkers, including the Systemic Immune-Inflammation Index (SII), neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), C-reactive protein (CRP), and other laboratory markers measured before and after surgery.

Secondary objectives include comparison of postoperative pain intensity at rest and during movement, opioid consumption, time to first rescue analgesia, quality of recovery assessed using the Quality of Recovery-15 (QoR-15) questionnaire, incidence of postoperative nausea and vomiting, time to first ambulation, length of hospital stay, patient satisfaction, and the incidence of postoperative complications.

The study is designed to determine whether combining peripheral nerve blockade with periarticular infiltration provides additive benefits not only for postoperative analgesia but also for modulation of autonomic-immune interactions and enhancement of postoperative recovery. The findings may improve understanding of peripheral nerve blocks as a form of perioperative neuromodulation and support optimization of regional anesthesia strategies in patients undergoing total hip arthroplasty.

Studietype

Ingrijpend

Inschrijving (Geschat)

165

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

  • Polen
      • Poznan, Polen, 62-701
        • Poznan University of Medical Sciences

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 100 jaar (Volwassen, Oudere volwassene)

Accepteert gezonde vrijwilligers

Nee

Geslachten die in aanmerking komen voor studie

Allemaal

Beschrijving

Inclusion Criteria:

  • Adults aged ≥18 years.
  • Scheduled for elective primary total hip arthroplasty due to primary hip osteoarthritis.
  • American Society of Anesthesiologists (ASA) physical status I-III.
  • Planned spinal anesthesia with one of the study regional analgesia techniques.
  • Ability to understand the study procedures and provide written informed consent.

Exclusion Criteria:

  • Refusal or inability to provide written informed consent.
  • Revision hip arthroplasty, simultaneous bilateral hip arthroplasty, or hip arthroplasty performed for an acute fracture.
  • Known hypersensitivity to ropivacaine or other medications required for the study procedures.
  • Contraindication to spinal anesthesia, PENG block, or local infiltration analgesia, including infection at the injection site or a coagulation disorder or antithrombotic treatment that precludes safe performance of the planned procedures.
  • Pre-existing neurological or neuromuscular disease that substantially affects sensation or motor function in the operated limb or prevents reliable assessment of study outcomes.
  • Cognitive impairment or a communication disorder that prevents understanding of the study procedures or reliable completion of pain assessments.
  • A medical condition that, in the investigator's judgment, makes participation or the planned anesthetic procedures unsafe.
  • Planned use of an additional regional analgesic technique outside the study protocol.
  • Participation in another interventional study that could interfere with the assessment of the study outcomes.

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: Behandeling
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Verviervoudigen

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: PENG Block

Ropivacaine for Pericapsular Nerve Group (PENG) Block
Geneesmiddel: PENG Block

Ultrasound-guided single-injection pericapsular nerve group (PENG) block performed before surgery using 20ml of 0.2% ropivacaine

Andere namen:
  • PENG
  • Pericapsulaire zenuwgroepblokkering
  • 0.2% Ropimol
Experimenteel: Local Infiltration Analgesia (LIA)

Ropivacaine for Local Infiltration Analgesia
Geneesmiddel: LIA

Local infiltration analgesia is performed intraoperatively - 20ml 0.2% ropivacaine

Andere namen:
  • Periarticular Infiltration Analgesia
  • 0.2% ropimol
Experimenteel: Combined PENG Block + LIA

Ropivacaine for Pericapsular Nerve Group (PENG) block before surgery and Local Infiltration Analgesia (LIA)
Geneesmiddel: PENG Block

Ultrasound-guided single-injection pericapsular nerve group (PENG) block performed before surgery using 20ml of 0.2% ropivacaine

Andere namen:
  • PENG
  • Pericapsulaire zenuwgroepblokkering
  • 0.2% Ropimol
Geneesmiddel: LIA

Local infiltration analgesia is performed intraoperatively - 20ml 0.2% ropivacaine

Andere namen:
  • Periarticular Infiltration Analgesia
  • 0.2% ropimol

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Change in Systemic Immune-Inflammation Index (SII)
Tijdsspanne: 24 hours after surgery

Comparison of the change in Systemic Immune-Inflammation Index from baseline to postoperative 24 hours among the three study groups.
24 hours after surgery

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Neutrophil-to-Lymphocyte Ratio (NLR)
Tijdsspanne: 24 hours after surgery

Comparison of the change in neutrophil-to-lymphocyte ratio among the three study groups.
24 hours after surgery
Neutrophil-to-Lymphocyte Ratio (NLR)
Tijdsspanne: 12 hours after surgery

Comparison of the change in neutrophil-to-lymphocyte ratio among the three study groups.
12 hours after surgery
Neutrophil-to-Lymphocyte Ratio (NLR)
Tijdsspanne: 48 hours after surgery

Comparison of the change in neutrophil-to-lymphocyte ratio among the three study groups.
48 hours after surgery
Platelet-to-Lymphocyte Ratio (PLR)
Tijdsspanne: 24 hours after surgery

Comparison of the change in platelet-to-lymphocyte ratio among the three study groups.
24 hours after surgery
Platelet-to-Lymphocyte Ratio (PLR)
Tijdsspanne: 48 hours after surgery

Comparison of the change in platelet-to-lymphocyte ratio among the three study groups.
48 hours after surgery
Platelet-to-Lymphocyte Ratio (PLR)
Tijdsspanne: 12 hours after surgery

Comparison of the change in platelet-to-lymphocyte ratio among the three study groups.
12 hours after surgery
Postoperative pain intensity
Tijdsspanne: 2 hours after surgery

Comparison of postoperative pain intensity assessed using the Numeric Rating Scale (NRS; 0-10) at rest.
2 hours after surgery
Postoperative pain intensity at movement
Tijdsspanne: 2 hours after surgery

Comparison of postoperative pain intensity assessed using the Numeric Rating Scale (NRS; 0-10) at movement.
2 hours after surgery
Postoperative pain intensity at movement
Tijdsspanne: 6 hours after surgery

Comparison of postoperative pain intensity assessed using the Numeric Rating Scale (NRS; 0-10) at movement.
6 hours after surgery
Postoperative pain intensity at movement
Tijdsspanne: 12 hours after surgery

Comparison of postoperative pain intensity assessed using the Numeric Rating Scale (NRS; 0-10) at movement.
12 hours after surgery
Postoperative pain intensity at movement
Tijdsspanne: 24 hours after surgery

Comparison of postoperative pain intensity assessed using the Numeric Rating Scale (NRS; 0-10) at movement.
24 hours after surgery
Postoperative pain intensity at movement
Tijdsspanne: 48 hours after surgery

Comparison of postoperative pain intensity assessed using the Numeric Rating Scale (NRS; 0-10) at movement.
48 hours after surgery
Postoperative pain intensity
Tijdsspanne: 6 hours after surgery

Comparison of postoperative pain intensity assessed using the Numeric Rating Scale (NRS; 0-10) at rest.
6 hours after surgery
Postoperative pain intensity
Tijdsspanne: 12 hours after surgery

Comparison of postoperative pain intensity assessed using the Numeric Rating Scale (NRS; 0-10) at rest.
12 hours after surgery
Postoperative pain intensity
Tijdsspanne: 24 hours after surgery

Comparison of postoperative pain intensity assessed using the Numeric Rating Scale (NRS; 0-10) at rest.
24 hours after surgery
Postoperative pain intensity
Tijdsspanne: 48 hours after surgery

Comparison of postoperative pain intensity assessed using the Numeric Rating Scale (NRS; 0-10) at rest.
48 hours after surgery
Postoperative opioid consumption
Tijdsspanne: 48 hours after surgery

Comparison of cumulative opioid consumption during the postoperative period, expressed as intravenous morphine milligram equivalents (MME).
48 hours after surgery
Time to first rescue analgesia
Tijdsspanne: 48 hours after surgery

Comparison of the time from the end of surgery to the first administration of rescue opioid analgesia.
48 hours after surgery
Systemic Immune-Inflammation Index (SII)
Tijdsspanne: 24 hours after surgery

Comparison of the change in the Systemic Immune-Inflammation Index (SII) among the three study groups.
24 hours after surgery
Systemic Immune-Inflammation Index (SII)
Tijdsspanne: 12 hours after surgery

Comparison of the change in the Systemic Immune-Inflammation Index (SII) among the three study groups.
12 hours after surgery
Systemic Immune-Inflammation Index (SII)
Tijdsspanne: 48 hours after surgery

Comparison of the change in the Systemic Immune-Inflammation Index (SII) among the three study groups.
48 hours after surgery
C-reactive protein (CRP)
Tijdsspanne: 12 hours after surgery

Comparison of postoperative C-reactive protein (CRP) concentrations among the three study groups.
12 hours after surgery
C-reactive protein (CRP)
Tijdsspanne: 24 hours after surgery

Comparison of postoperative C-reactive protein (CRP) concentrations among the three study groups.
24 hours after surgery
C-reactive protein (CRP)
Tijdsspanne: 48 hours after surgery

Comparison of postoperative C-reactive protein (CRP) concentrations among the three study groups.
48 hours after surgery

Medewerkers en onderzoekers

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

Sponsor

Poznan University of Medical Sciences

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)

1 december 2026

Primaire voltooiing (Geschat)

30 december 2027

Studie voltooiing (Geschat)

1 januari 2028

Studieregistratiedata

Eerst ingediend

29 juli 2026

Eerst ingediend dat voldeed aan de QC-criteria

3 november 2026

Eerst geplaatst (Werkelijk)

9 november 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

9 november 2026

Laatste update ingediend die voldeed aan QC-criteria

3 november 2026

Laatst geverifieerd

1 november 2026

Meer informatie

Termen gerelateerd aan deze studie

Andere studie-ID-nummers

  • 18/2026

Plan Individuele Deelnemersgegevens (IPD)

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

JA

Beschrijving IPD-plan

De-identified individual participant data underlying the published results will be made available upon reasonable request to the corresponding author. Data will be shared after publication of the primary study results and following approval of a methodologically sound research proposal and completion of a data sharing agreement.

IPD-tijdsbestek voor delen

Data will be available beginning 6 months after publication of the primary results and for a period of 5 years.

IPD-toegangscriteria voor delen

Researchers who provide a methodologically sound proposal aimed at achieving the objectives of the approved proposal will be granted access. Requests should be directed to the corresponding author. A data access agreement will be required prior to data release.

IPD delen Ondersteunend informatietype

  • LEERPROTOCOOL
  • SAP
  • ANALYTIC_CODE

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

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