Lumbar Plexus, Near Infrared Spectroscopy, Nerve Block
Conditions
Brief summary
Tests such as the pin-prick test, cold application or the Bromage scale are currently used to measure the success of nerve blocks and are considered subjective assessments as they require verbal consent from the patient. Near Infrared Spectroscopy (NIRS) measures the differential absorption and reflection of near infrared light transmitted by human tissues, providing a tissue-oxygen saturation index. Modern NIRS-based instruments use multiple detectors to filter spectroscopy data from skin structures to detect subcutaneous tissue oxygenation. Successful regional anesthesia results in decreased sympathetic activity within the distribution of blocked nerves. Regional oxygen saturation (rSO2) has been shown to increase in innervated areas after sympathetic block.
Detailed description
The aim of this study was to show whether the success of lumbar plexus block applied in lower extremity orthopedic surgeries can be evaluated by Near Infrared Spectroscopy (NIRS), which is used to measure tissue oxygenation.
Interventions
DEVICENear Infrared Spectroscopy
Two NIRS probes will be attached to the extremity to be operated on and to the other lower extremity on the opposite side, at a level approximately coinciding with the midline above the quandriceps femoris muscle.
Sponsors
Bursa Yuksek Ihtisas Training and Research Hospital
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
DIAGNOSTIC
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 90 Years
Healthy volunteers
No
Inclusion criteria
* 18-90 years old * femoral neck fracture, * femoral shaft fracture, * hip replacement surgery * who will undergo velumbar plexus block will be included in the study.
Exclusion criteria
* BMI\>40 kg/m2 * infection in the block area * peripheral neuropathy, * hemoglobinopathy * peripheral vascular disease * allergy to local anesthetics * patients with contraindications for lumbar plexus block
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| rso2 | 40 minutes | The regional oxymetry probe will be placed in the the quandriceps femoris muscle, one on the extremity to be operated on and the other on the opposite lower extremity. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| sensory block level | 40 minutes | The sensory block level will be realised by cold testing at 10 minute intervals after applying the block. |
| blood pressure values | 40 minutes | systolic, diastolic and mean blood pressure values will be recorded non-invasively in mmhg. |
| so2 | 40 minutes | fingertip SO2 measured by pulse oximetry |
Contacts
Primary ContactKorgün Ökmen, Assoc. PhD.
Outcome results
None listed