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Early Detection of Supraclavicular Brachial Plexus Block Failure Using Infrared Thermography and Perfusion Index

ConditionsRegional AnaesthsiaBrachial Plexus Blocks
Trial statusNot yet recruiting
Trial phaseNot applicable
Trial typeInterventional
Biological sexAll
Age18-70
SponsorAssiut University

About this trial

Successful peripheral nerve blockade is fundamental to modern regional anesthesia, particularly for upper limb surgeries. Ensuring the efficacy of a nerve block early in the perioperative period is critical, as delayed recognition of block failure may lead to intraoperative pain, the need for additional sedation or general anesthesia, and overall poorer patient outcomes. Conventional methods for assessing block success, such as sensory testing with pinprick or cold stimuli and motor assessment using strength scales, require patient cooperation and often take 15-30 minutes to yield definitive results. These delays are especially limiting in fast-paced surgical environments or when early decisions regarding anesthesia management are necessary.

Emerging non-invasive monitoring technologies offer promising alternatives for the early, objective assessment of block efficacy. Infrared Thermography (IRT) measures skin surface temperature, which increases due to sympathetic nerve blockade-induced vasodilation.

Eligibility criteria

This trial does not accept healthy volunteers

Qualifiers

Adults aged 18-70 years

ASA Physical Status I-III

Disqualifiers

General

Coagulopathy

Allergy to local anesthetics

Special

Trial design

Design model

Single group

Treatments tested in this trial

  • Ultrasound-Guided Supraclavicular Block

    Procedure/Surgery

    Ultrasound-guided supraclavicular brachial plexus block using a high-frequency linear ultrasound probe-real-time visualization of the brachial plexus for precise anesthetic delivery.

  • Bupivacaine Hydrochloride 0.5 % Injectable Solution

    Drug

    30 mL used for supraclavicular brachial plexus block

  • Ultrasound

    Device

    Imaging for block placement

  • Infrared Thermography Camera

    Device

    Skin temperature monitoring

  • Pulse Oximeter

    Device

    Perfusion Index monitoring

Treatment groups

80 Participants
are divided into 1 treatment group
Group A: Supraclavicular Brachial Plexus Block with Thermographic and Perfusion MonitoringExperimental treatment 5 interventions

Trial outcomes

Primary outcomes

1

Change in Skin Temperature (°C) Measured by Infrared Thermography From Baseline to 10 Minutes Post-block.

Mean change in skin temperature on the operative limb captured using infrared thermography at defined time points.

Time frame
Baseline, 5, and 10 minutes post-injection
2

Change in Perfusion Index From Baseline to 10 Minutes Post-block

PI measured via pulse oximeter; change calculated as ratio to baseline values.

Time frame
Baseline, 5, and 10 minutes post-injection

Secondary outcomes

1

Correlation Between Changes in Skin Temperature and Perfusion Index With Sensory and Motor Block Scores at 20 Minutes

Correlation between physiologic changes and clinical assessments of sensory and motor block success using pinprick/cold test and Modified Bromage Scale.

Time frame
20 minutes post-injection

Other outcomes

Locations

This trial has no locations.

Sponsors and contacts

Click on the lead sponsor to view all of their trials.

Assiut University

Lead sponsor

Source ClinicalTrials.gov

This trial is not recruiting at the moment. You can still explore other options: