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CompletedNCT03845972Updated Feb 19, 2019

Effect of Saphenous Nerve and Nerve to Vastus Medialis Block Within Subsartorial Femoral Triangle on Quadriceps Strength

An interventional study of SSFTB in Saphenous Nerve Block, Regional Anesthesia Morbidity and Postoperative Pain, sponsored by Thammasat University. Completed at 1 site in Thailand. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2019-02-19.

Sponsored by Thammasat University · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Registered 8 months after the study started (first participant enrolled Apr 2018, registered Jan 2019).
Phase
Not applicable
Study type
Interventional
Enrollment
40
Allocation
Non-randomized
Ages
18 Years to 80 Years
Sex
All
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Study summary

This research objective is to compare quadriceps strength by measuring maximal voluntary isometric contraction (MVIC) and risk of fall before and after subsartorial femoral triangle block (SSFTB)

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Conditions studied

  • Saphenous Nerve Block
  • Regional Anesthesia Morbidity
  • Postoperative Pain

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03

In context

Pain, Postoperative

5,093 studies on the registry are indexed under Pain, Postoperative; 1,140 are open to participants now.

This study's enrollment of 40 is below the median of 75 across 4,344 interventional studies indexed under Pain, Postoperative.

Browse Pain, Postoperative studies →

Lead sponsor

Thammasat University is the lead sponsor of 83 studies on the registry; 16 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Eligible patients are all ASA class I-III, age 18-80 years, and have plan to perform SSFTB at Thammasat University Hospital consecutively

Exclusion criteria

Exclusion Criteria:

  • Exclusion criteria are patients who refuse to participate the study, morbid obesity (BMI ≥ 35 kg.m2), lower extremity neurological dysfunction, performing other peripheral nerve blocks, patients who cannot cooperate or measure MVIC, difference of quadriceps strength between two side of knees more than 10 percent, and SSFTB is not finally performed or failed block.
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Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Single group
Masking
None (open label)
Enrollment
40 participants (actual)

Study arms

  • No intervention
    before SSFTB
  • Experimental
    after SSFTB

    Procedure: SSFTB

Interventions

  • ProcedureSSFTB

    Patients who underwent major knee surgery and had already planned to perform subsartorial femoral triangle block (SSFTB) were included in the study. They were measured the outcomes the night before surgery. The saphenous nerve and nerve to vastus medialis were blocked at the subsartorial femoral triangle level by experienced anesthesiologists. After standard monitor, the distal femoral triangle was identified 2 cm proximal to the opening of adductor canal by ultrasound guidance. At this level, The location of nerve to vastus medialis was confirmed by nerve stimulator and it was blocked with 0.5% levobupivacaine 5 ml. Then, 0.5% levobupivacaine 10 ml would be injected perifemoral artery. The outcomes were re-assessed 30 min after block.

    Also known as: nerve to vastus medialis and saphenous nerve block

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What researchers measure

Primary outcomes

  1. quadriceps strength

    Quadriceps strength will be assessed as MVIC with handheld dynamometer (HHD, Lafayette Instrument, Lafayette, IN).

    Time frame: 30 minutes after SSFTB

Secondary outcomes

  1. motor power of knee extension

    The muscle power will be graded compared to another leg: 0 = No motor block, 1 = partial motor block, 2 = complete motor block.

    Time frame: 30 minutes after SSFTB

  2. perception of fall 30 minutes

    If the patient can be able to stand independently for at least 30 seconds without support, he or she will be asked to do functional reach test, which the patient should reach forward by staying put feet. The difference of starting and ending point of the reaching hand will be measured. If the patient cannot stand independently for at least 30 seconds without support or do functional reach test less than 25 cm indicates that he or she has a higher risk for falls.

    Time frame: 30 minutes after SSFTB

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Study locations

1 site
  • Ratibhorn Rangsee
    Klong Luang, Pratumthani 12120, Thailand
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References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 19, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT03845972
Lead sponsor
Thammasat University
Responsible party
Alisa Seangleulur (Assistant Professor, Thammasat University) — Principal investigator
First posted
Feb 19, 2019
Start date
Apr 25, 2018
Primary completion
Jan 4, 2019
Completion
Jan 4, 2019
Last update
Feb 19, 2019

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Feb 2019. You cannot join it, but the record below documents what was studied.

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