Laminoplasty and laminectomy have been used for decades for the treatment of intraspinal space occupying lesions, spinal stenosis, disc herniation, injuries, etc. After these procedures, patients often experience severe postoperative pain at the surgical site. However, current methods of pain control are mostly insufficient. At present, several pain controlling methods are available, to reduce postoperative pain after laminoplasty or laminectomy. Methods for systemic administration include: oral analgesics, intermittent intravenous, intramuscular injections, patient- controlled intravenous analgesia, etc. However, the aforementioned methods may have a lot of side effects, and are usually used after the occurrence of pain and the analgesic effects are sometimes inadequate. Topical administration options use a lower dose of drugs and therefore have less systemic side effects. Pre-emptive injection of local anesthetics can significantly reduce postoperative pain during rest and movement, however, the analgesic effect is maintained for a relatively short period of time. It is necessary to use more cases to explore the other compatibility of drugs with longer duration of action and stronger analgesic effect. Betamethasone as the stereoisomer of dexamethasone is a long-acting corticosteroid, which has long lasting anti-inflammatory properties. Whether betamethasone combined with local anesthetic for laminoplasty or laminectomy has better short-term and long-term effects than the local anesthetic alone has not been reported yet. Therefore, a prospective, randomized, controlled, blinded-endpoint study is needed to compare the postoperative analgesic efficacy of preemptive wound infilteration of ropivacaine alone and betamethasone plus ropivacaine for laminectomy or laminoplasty.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
SINGLE
Enrollment
116
The local infiltration solution in the treatment group will consist of betamethasone and ropivacaine. For local infiltration, a total of 30 ml solution will be prepared for each group, which will include 0.5ml of compound betamethasone injection(betamethasone propionate 5mg and betamethasone sodium phosphate 2mg per 1ml) added to 14.5ml of saline and 15ml of 1% ropivacaine. The surgeon will perform wound infiltration after induction of anesthesia and before surgery. A total of 10 ml of solution will be injected into each level. The study solution will be injected into the subcutaneous tissue, paravertebral muscles, along with the posterior area around the spinous process, lamina, transverse process and the facet joints, along both sides of the planned incision. The epidural space and intrathecal space will not be infiltrated.
The local infiltration solution in the control group will consist of ropivacaine. For local infiltration, a total of 30 ml solution will be prepared for each group, which will include 15ml of ropivacaine added to 15 ml of saline for the Control group. The surgeon will perform wound infiltration after induction of anesthesia and before surgery. A total of 10 ml of solution will be injected into each level. The study solution will be injected into the subcutaneous tissue, paravertebral muscles, along with the posterior area around the spinous process, lamina, transverse process and the facet joints, along both sides of the planned incision. The epidural space and intrathecal space will not be infiltrated.
Beijing Tiantan Hospital
Beijing, Beijing Municipality, China
The cumulative butorphanol dose during the 48 hours after surgery via the PCA device.
All participates will receive an electronic intravenous patient-controlled analgesia (PCA) device. Participates will be advised to push the analgesic demand button if they feel pain.
Time frame: Within 48 hours after the operation
The Visual Analogue Scale (VAS) during movement (VASm)
The pain will be assessed by the visual analogue scale (VAS) scores: an 11-point VAS score during movement (VASm) will be recorded (0 indicates no pain, 10 indicates the most severe pain imaginable, a higher score means worse pain)
Time frame: At 2 hours, 4 hours, 8 hours, 24 hours, 48 hours and 72 hours, and 1 week, 2 weeks, 4 weeks, 6 weeks and 3 months and 6 months after surgery.
The Visual Analogue Scale (VAS) at rest (VASr)
The pain will be assessed by the visual analogue scale (VAS) scores: an 11-point VAS score at rest (VASr) will be recorded (0 indicates no pain, 10 indicates the most severe pain imaginable, a higher score means worse pain)
Time frame: At 2 hours, 4 hours, 8 hours, 24 hours, 48 hours and 72 hours, and 1 week, 2 weeks, 4 weeks, 6 weeks and 3 months and 6 months after surgery.
The total times that participants press patient-controlled analgesia button
The total times that participants press patient-controlled analgesia button including effective presses and ineffective presses.
Time frame: Within 48 hours after the operation
The first analgesia demand on the PCA device
The time from the end of the surgery to the first administration of analgesia via the PCA device
Time frame: Within 48 hours postoperatively
Patient Satisfaction Score (PSS)
The Patient Satisfaction Score (PSS): 0 for unsatisfactory, and 10 for very satisfied
Time frame: At 2 hours, 4 hours, 8 hours, 24 hours, 48 hours, 72 hours, 1 week, 2 weeks, 4 weeks, 6 weeks, 3 months and 6 months after surgery
The Postoperative Nausea and Vomiting (PONV)
The Postoperative Nausea and Vomiting (PONV) will be measured using an ordinal scale, with 0 indicating no nausea; 1, mild nausea not requiring treatment; 2, nausea requiring treatment; 3, vomiting.
Time frame: At 2 hours, 4 hours, 8 hours, 24 hours, 48 hours after surgery
Ramsay Sedation Scale (RSS)
The Ramsay Sedation Scale (RSS): A 6-point scale will be used to assess sedation levels, with 1 indicating agitated, anxious; 2, cooperative; 3, only responds to commands; 4, strong response to glabellar tapping or noisy stimulants; 5, weak response to glabellar tapping or noisy stimulants; 6, no response.
Time frame: At 2 hours, 4 hours, 8 hours, 24 hours, 48 hours after surgery
The World Health Organization Quality of Life-BREF (WHOQOL-BREF) scores
The World Health Organization Quality of Life-BREF (WHOQOL-BREF) scores will be used to obtain scores for four domains related to quality of life: physical health (7 items), psychological (6 items), social relationships (3items) and environment (8items). It will also include two stand-alone questions on overall quality of life and satisfaction with health. Each question will be rated on a scale of 1-5 with higher scores signifying better quality of life.
Time frame: At 6 months postoperatively
The Oswestry Disability Index (ODI)
Functional disability will be assessed by the Oswestry Disability Index. It includes 10 questions about pain and activities of daily living. Each item has five response categories from no pain related disability (0), to the worst possible pain disability (100). The ODI has been reported to be the most widely used and validated outcome measure in spinal surgery.
Time frame: Preoperatively and at 4 weeks, 6 weeks and 3 months, 6 months after surgery.
Patient Scar Assessment and the Observer Scar Assessment Scale (POSAS)
The Patient and Observer Scar Assessment Scale includes subjective symptoms of pain and pruritus and consists of 2 numerical scales: The Patient Scar Assessment Scale and the Observer Scar Assessment Scale. It assesses vascularity, pigmentation, thickness, relief, pliability, surface area and overall opinion for a scar on a score of 1 (normal skin) to 10 (worst scar imaginable). and it incorporates patient assessments of pain, itching, color, stiffness, thickness, relief and overall opinion. Participants were asked to rate the severity of their scar compared to normal skin. The overall opinion scale score ranged from 1 (normal skin) to 10 (very different from normal skin)
Time frame: At 6 months postoperatively
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