Neurotoxicity of Spinal Anesthesia With Ropivacaine and Bupivacaine (BuRoNe)

University of Rzeszow

Status and phase: Unknown; Phase 4

Conditions: Anaesthetic Complication Neurological; Anesthesia; Adverse Effect, Spinal and Epidural

Treatments: Drug: Ropivacaine; Drug: Bupivacaine

Study type: Interventional

Funder types: Other

Identifiers

NCT03293472

URzeszow

Details and patient eligibility

About

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.

Full 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

Enrollment: 60 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

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.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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60 participants in 2 patient groups

Ropivacaine

Experimental group

Description:

Experimental: 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 bolus doses of ropivacaine as required, followed by 0.2% ropivacaine, 1 ml/h for the postoperative period

Treatment:

Drug: Ropivacaine

Bupivacaine

Active Comparator group

Description:

0.5% v Bupivacaine mg (isobaric) loading dose of 0.5% bupivacaine, 3.0 ml for the patients \< 160 cm tall, 3.3 ml for 161-170 cm tall, 3.6 ml for 171-180 cm tall, and 4.0 ml \> 180 cm. and supplementary bupivacaine bolus dose as required, followed by 0,12% bupivacaine 1 ml/h for the postoperative period

Treatment:

Drug: Bupivacaine