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

Postoperative Pain Clinical Trial

Official title:

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

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03845972
• Other study ID #: ??.2/44/2561
• Status: Completed
• Phase: N/A
• Start date: April 25, 2018
• Est. completion date: January 4, 2019

Study information

• Verified date: February 2019
• Source: Thammasat University
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial 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)

Recruitment information / eligibility

• Status: Completed
• Enrollment: 40
• Est. completion date: January 4, 2019
• Est. primary completion date: January 4, 2019
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years to 80 Years

Eligibility

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 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.

Related Conditions & MeSH terms

• Pain, Postoperative
• Postoperative Pain
• Regional Anesthesia Morbidity
• Saphenous Nerve Block

Intervention

Procedure:
• SSFTB
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.

Locations

Country	Name	City	State
Thailand	Ratibhorn Rangsee	Klong Luang	Pratumthani

Sponsors (1)

Lead Sponsor	Collaborator
Thammasat University

Country where clinical trial is conducted

Thailand, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	quadriceps strength	Quadriceps strength will be assessed as MVIC with handheld dynamometer (HHD, Lafayette Instrument, Lafayette, IN).	30 minutes after SSFTB
Secondary	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.	30 minutes after SSFTB
Secondary	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.	30 minutes after SSFTB