Anaesthetic Complication Neurological, Anesthesia; Adverse Effect, Spinal and Epidural
Conditions
Brief summary
Consenting patients, scheduled for orthopaedic surgery under spinal anesthesia will be randomly assigned (1:1) to receive ropivacaine or bupivacaine as a single shot before the start of surgery, followed by bolus doses of the same local anesthetic as required during the surgery, and continuous infusion of the same local anesthetic for 24 hours postoperatively. Primary Outcome Measures: Evaluation of changes in concentrations of glutamate in the cerebrospinal fluid and in the blood. Secondary outcomes: : Evaluation of changes in concentrations of selected mediators of inflammatory response (IL-1β, IL-6, TNF and others) and selected chemokines as markers of the glia damage. Hemodynamic stability during the surgery, and efficacy of postoperative analgesia will be also evaluated.
Detailed description
With the approval from the Bioethical Committee of the University of Rzeszow, informed written consent will be obtained from all patients. A sample size of 60 patients was calculated to obtain at least 25% reduction of glutamate concentration in the cerebrospinal fluid in the ropivacaine group with 0,05 significance and power of 0,8. Consenting patients, scheduled for orthopaedic surgery under spinal anesthesia will be randomly (1:1) assigned using closed envelopes to receive intrathecally ropivacaine or bupivacaine as a single shot before the start of surgery, followed by bolus doses of the same local anesthetic as required during the surgery, and continuous infusion of the same local anesthetic for 24 h for postoperative pain relief. All block will be performed in the sitting position, and the drug will be administered in supine position through the catheter in the intrathecal space. Blood and cerebrospinal fluid samples will be drawn at predetermined time intervals centrifuged as required and frosen in -70deg C until analysis. Eligibility Ages eligible for study 18 years and older (Adult, Senior) Sexes Eligible for the Study: All Accepts Healthy Volunteers: No Inclusion Criteria: Orthopedic procedures in the lower limbs Written informed consent Exclusion criteria Patients' refusal Known allergies to study medications Anatomic, posttraumatic and postoperative deformations of the spinal column making placement of intrathecal catheter impossible Neurological contraindications Any other contraindications for spinal anesthesia (coagulations disorders, antiplatelet or anticoagulant treatment, infection at the puncture site. Inability to comprehend or participate in pain scoring scale
Interventions
DRUGRopivacaine
Procedure: Continuous Epidural Anesthesia Local anesthetic injection to the cerebrospinal fluid (subarachnoid space) at the L3-L4 or L4-L5 level Drug: ropivacaine Other name: Ropimol 0.5% ropivacaine (isobaric) 4.5 ml for the patients \< 160 cm tall, 5.0 ml for 161-170 cm tall, 5.5 ml for 171-180 cm tall, and 6.0 ml \> 180 cm, supplementary ropivacaine bolus doses as required, followed by 0.2% ropivacaine, 1 ml/h for the postoperative period Device : The Wiley Spinal Catheter-Over-Needle System for Continuous Spinal Anesthesia 4-6 23-gauge intrathecal cannula over a 27-gauge pencil-point spinal needle
DRUGBupivacaine
Procedure: Continuous Epidural Anesthesia Local anesthetic injection to the subarachnoid space at the L3-L4 or L4-L5 level Drug: bupivacaine Loading dose of bupivacaine followed by 0.12% bupivacaine, 1 ml/h Other name: bupivacaine Device: The Wiley Spinal Catheter-Over-Needle System for Continuous Spinal Anesthesia 4-6 23-gauge intrathecal cannula over a 27-gauge pencil-point spinal needle
Sponsors
Department of Anesthesiology, Intensive Therapy, District Hospital No2 in Rzeszow
University of Rzeszow
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Subject)
Masking description
Patient unaware of the local anesthetic used.
Intervention model description
Parallel study
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
\- Orthopedic procedures in the lower limbs Written informed consent
Exclusion criteria
* Patients' refusal Known allergies to study medications Inability to comprehend or participate in pain scoring scale Anatomic, posttraumatic and postoperative deformations of the spinal column making placement of intrathecal catheter impossible Neurological contraindications Any other contraindications for spinal anesthesia (coagulations disorders, antiplatelet or anticoagulant treatment, infection at the puncture site.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Inflammatory mediators, neural tissue injury markers and the markers of oxidative stress in the cerebrospinal fluid of patients undergoing spinal anesthesia with ropivacaine and bupivacaine. | 24 h | Evaluation of changes in concentrations of • glutamate in the cerebrospinal fluid and in the blood of patients undergoing orthopaedic surgery under spinal anesthesia with either ropivacaine or bupivacaine |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Inflammatory mediators, neural tissue injury markers and the markers of oxidative stress in the cerebrospinal fluid of patients undergoing spinal anesthesia with ropivacaine and bupivacaine. | 24 h | Evaluation of changes in concentrations of selected mediators of inflammatory response (IL-1β, IL-6, tumor necrosis factor and others) |
Other
| Measure | Time frame | Description |
|---|---|---|
| Inflammatory mediators, neural tissue injury markers and the markers of oxidative stress in the CSF of patients undergoing spinal anesthesia with ropivacaine and bupivacaine. | 24 h | Assessment of hemodynamic stability in patients anaesthetized with continuous epidural infusion of ropivacaine and bupivacaine |
Countries
Poland
Contacts
Primary ContactMarek Wojtaszek, M.D., Ph.D.
Backup ContactBogumila Woloszczuk-Gebicka, M.D., Ph.D.
Outcome results
None listed