Arterio-venous Fistula
Conditions
Keywords
NIR Spectroscopy, Nerve Blockade, Surgical Arteriovenous Shunt
Brief summary
Peripheral regional anesthesia induces a sympathectomy-like effect with neurovascular changes causing increased arterial blood flow and venodilatation . Near-infrared spectroscopy (NIRS) can be applied to different kinds of tissue providing oxygen saturation by detecting the absorption and reflection of near-infrared light . The effect on peripheral tissue oxygenation in patients undergoing arteriovenous fistula revision has not yet been examined. We postulate an increase in tissue oxygenation by sympathicolysis caused by peripheral regional anesthesia that might be the reason for beneficial outcome. The aim of our study was to demonstrate the effect of a supraclavicular plexus block in this group of patients.
Interventions
Supraclavicular nerve block using ultrasound and 10ml ropivacaine 0.5% with 20ml mepivacaine 1%
Sponsors
Marienhospital Stuttgart
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* all patients undergoing surgery under regional anaesthesia
Exclusion criteria
* patients refusal
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| NIRS after block | 5 minutes before block until 30 minutes after block | Absolute change from baseline value in tissue oxygenation |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Difference between both arms | 5 minutes before block until 30 minutes after block | Absolute difference in tissue oxygenation between blocked arm and contralateral arm |
Countries
Germany
Outcome results
None listed