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Parasacral Ischial Plane Block in Lower Extremity Surgery

NCT07594197 · Status: NOT_YET_RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 60

Last updated 2026-05-18

No results posted yet for this study

Summary

The parasacral ischial plane block is a novel fascial plane approach targeting the sacral plexus. This technique is technically less challenging and eliminates the requirement for direct visualization of the sacral plexus. The aim of this prospective observational study is to evaluate the efficacy of the conventional sacral plexus block versus the parasacral ischial plane block in patients undergoing lower extremity surgery.

Conditions

  • Patients Scheduled for Elective Lower Extremity Surgery
  • Ages 18-80
  • ASA I-III
  • Patients Operated on Under Regional Anesthesia
  • Patients Who Provided Written Informed Consent

Interventions

PROCEDURE

Parasacral Ischial Plan Block

The sacral plexus is located within a fascial plane formed by the pelvic fascia anteriorly, the sacrum medially, the piriformis and gluteus maximus muscles posteriorly, and the ischium laterally. The piriformis muscle has no attachment to the ischium and attaches to the greater trochanter laterally. A fascial plane exists between the piriformis muscle and the ischium; this fascial plane extends to the sacral plexus. Venkataraju et al. stated that in PIP block demonstrations, the needle should be directed and placed towards the posteromedial surface of the ischium. After bone contact, the medication was injected, and it was observed that the medication spread from under the piriformis muscle towards the sacral plexus.

PROCEDURE

Sacral plexus block

This block, defined by the parasacral approach, targets the exit point of the plexus at the level of the foramen ischiadicum majus. Unlike distal sciatic blocks, blocking at this level includes the posterior cutaneous femoral nerve, superior/inferior gluteal nerve, and pudendal nerve, along with the ischial nerve. In current practice, ultrasonography (USG) has become the "gold standard"; visualizing the neural structures deep to the piriformis muscle by placing the probe between the lateral sacrum and the iliac wing increases the success rate while minimizing the risk of complications.

Sponsors & Collaborators

  • Bursa Yuksek Ihtisas Training and Research Hospital

    lead OTHER_GOV

Principal Investigators

  • Korgün Ökmen · Bursa Yuksek Ihtisas Training and Research Hospital

Study Design

Allocation
RANDOMIZED
Purpose
SUPPORTIVE_CARE
Masking
DOUBLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2026-05-01
Primary Completion
2027-05-01
Completion
2027-05-01

Countries

  • Turkey (Türkiye)

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07594197 on ClinicalTrials.gov