randomized controlled comparison of pre-op tlip vs intra-op tlip

Conditions: Pain; Spine Fusion

Summary: single-center, randomized study will enroll 50 subjects who are scheduled for 1-3 level posterior laminectomy \& fusion. study participants who are eligible for the posterior lumbar laminectomy and fusion procedure will be scheduled and also consented as a part of the study. participants will be stratified based on age and gender to ensure equal distribution.

this is a single-center, randomized study. the study will enroll 50 subjects who are scheduled for 1-3 level posterior laminectomy \& fusion. potential participants who are eligible for the posterior lumbar laminectomy and fusion procedure will be scheduled as a study participant, consented as a part of the study, and stratified based on age and gender to ensure equal distribution. for each participant, demographics including age, sex, smoking and alcohol use history, body mass index (bmi), cranial cervical instability (cci), american society of anesthesiology classification (asa), prior opioid use for pain management, pain levels, function, and prior history of other spinal surgery will be collected prior to surgery. participants will be randomly assigned to one of two treatment groups: pre-op ultrasound thoracolumbar interfacial plane block (tlip) group or intra-operative thoracolumbar interfacial plane block (tlip) group. the participant will then undergo the planned 1 to 3 level posterior lumbar laminectomy and fusion procedure. post-operative opioid analgesia will be assessed using the visual analog scale (vas) upon arrival to the post-anesthesia unit (pacu) until discharge and in the outpatient setting. pain, satisfaction, and opioid analgesia consumption will also be assessed at 2-3 weeks post-operatively, 4-6 weeks post-operatively, and 3 months post-operatively. pain will be assessed using vas. satisfaction will be assessed using a likert scale. opioid analgesia is defined as oxycodone, oxymorphone, hydrocodone, hydromorphone, fentanyl, morphine, codeine, methadone, tramadol, and buprenorphine. opioid consumption will be measured in morphine milligram equivalents (mme).

Eligibility criteria:
inclusion criteria: * greater than or equal to 18 years of age on the date of service * require a 1 to 3 level posterior laminectomy with fusion * compliant with study requirements and outpatient follow-up * a daily mme less than 25 mme per day in the per-operative period exclusion criteria: * younger than 18 years of age on the date of service * does not consent to participating in the program or to be refusal to follow-up at 2-3 weeks, 4-6 weeks, and 3 months post-operatively * requiring revision surgery at the same level for posterior laminectomy with fusion * a daily mme score \>25 mme/day in the pre-operative period will be excluded * a positive drug screen for cocaine and/or tetrahydrocannabinol (thc), defined in the standard corewell drugs of abuse screening as cocaine \> 300 ng/ml and cannabinoid \> 50 ng/ml-any * ongoing lawsuits, workers compensation, and litigation will be excluded.

Keywords: thoracolumbar interfacial plane block lumbar spine fusion posterior laminectomy with fusion