Pre-incisional Infiltration With Ropivacaine Plus Diprospan for Relieving Postoperative Pain After Thoracoscopic Surgery

N/ANot Yet RecruitingNCT07626489

Beijing Tiantan Hospital100 enrolled

Overview

Video-assisted thoracoscopic surgery (VATS) is less invasive compared to traditional thoracotomy, but it is still reported that the incidence of acute pain following VATS exceeds 80%. Inadequate postoperative analgesia may trigger a series of adverse physiological stress responses, increase the occurrence of postoperative complications, and affect the rehabilitation process. If acute pain is not managed promptly and sufficiently, nearly one-quarter of patients may develop chronic pain, impacting normal life and sleep quality after discharge. Acute pain after VATS is mainly caused by the release of inflammatory mediators after soft tissue injury at the surgical site, which activates peripheral pain receptors and leads to abnormal action potentials transmitted along A δ and C fibers. Inflammatory mediators released from the soft tissues around incisions not only significantly alters the chemical microenvironment at the peripheral terminals of nociceptors, directly inducing pain, but also sensitizes afferent fibers, contributing to peripheral sensitization. Incisional infiltration is the simplest, safest, and most effective anesthesia method for preventing incision pain after VATS, but even using long-acting local anesthetics, the effectiveness of postoperative analgesia can only last for a relatively short period of time. To improve the efficiency of local incision infiltration in postoperative analgesia, at least two issues need to be addressed: prolonging the duration of analgesia and reducing inflammation of nerve surrounding tissues. Numerous studies have shown that glucocorticoids not only can achieve anti-inflammatory and analgesic effects by inhibiting inflammatory cytokines and inflammatory responses but also can prolong the duration of action of local anesthetics. Preemptive incisional infiltration using local anesthetics with corticosteroids which have potent local anti-inflammatory properties may play a key role in preventing or reducing postoperative pain. The objective of this trial is to determine whether preemptive incisional infiltration with ropivacaine plus diprospan is superior to ropivacaine alone in relieving postoperative pain for adults undergoing VATS. The investigators also compare the effects of the two intervention measures on postoperative pain management, patient safety, and recovery quality.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Interventions

Pre-incisional infiltration with ropivacaine plus diprospanDRUG

Before the surgery, according to the surgeon's incision marking, the patients accept 0.5ml of diprospan (1ml diprospan: Betamethasone Dipropionate 5mg and Betamethasone Sodium Phosphate 2mg) plus 15ml of 1% ropivacaine diluted with 0.9% saline to a total volume of 30ml infiltrates the incision layer by layer (1ml subcutaneous infiltration at each location, 2ml full layer infiltration, total 3ml).

Pre-incisional infiltration with ropivacaine plus diprospanDRUG

Before the surgery, according to the surgeon's incision marking, the patients accept 30ml of 0.5% ropivacaine infiltrates the incision layer by layer (1ml subcutaneous infiltration at each location, 2ml full layer infiltration, total 3ml).

Eligibility

Sex: ALLMin age: 18 YearsMax age: 64 Years

Medical Language ↔ Plain English

Inclusion Criteria: 1. Patients scheduled for elective Video-assisted thoracoscopic surgery for wedge resection, segmentectomy and lobectomy of the lungs under general anesthesia; 2. 8 to 64 years old 3. American Society of Anesthesiologists (ASA) physical status of I-III 4. Patients must be able to understand the nature and potential personal consequences of the clinical trial and cooperate with follow-up investigations 5. signing of the informed consent form. Exclusion Criteria: 1. History of allergies to experimental drugs such as opioids or steroids; 2. Alcohol abuse; Long term use of opioid drugs (exceeding 2 weeks or 3 days per week for more than 1 month); Suspected use of sedatives and analgesics; Use analgesic drugs within 24 hours before surgery; Patients undergoing steroid therapy; 3. Serious neurological disorders, severe liver and kidney dysfunction, heart failure, etc; 4. Unable to use pain assessment scale; 5. Pregnant or lactating patients.

Outcomes

Primary Outcomes

Intravenous Morphine Equivalents of Rescue Analgesic Medications Within 48 Hours Postoperatively

Time frame: The postoperative period 48 hours

Secondary Outcomes

Area Under the Curve (AUC) of Numeric Rating Scale at rest (NRSr) Within 0-72 Hours Postoperatively

scores of 1-3 indicate mild pain, 4-6 denote moderate pain, and 7-10 signify severe pain

Time frame: Data will be collected at 4、12、24、36 and 72 hours postoperatively

Area under the curve (AUC) of the Numerical Rating Scale during movement (NRSm) within 0-72 hours postoperatively

The Numeric Rating Scale (NRS) designates 0 as representing no pain and 10 as representing the most severe pain, scores of 1-3 indicate mild pain, 4-6 denote moderate pain, and 7-10 signify severe pain.

Time frame: Data will be collected at 4、12、24、36 and 72 hours postoperatively

Numeric Rating Scale at rest (NRSr) at 1 week, 1 month, and 3 months postoperatively

The Numeric Rating Scale (NRS) designates 0 as representing no pain and 10 as representing the most severe pain; scores of 1-3 indicate mild pain, 4-6 denote moderate pain, and 7-10 signify severe pain.

Time frame: Postoperative day 7, month 1, and month 3.

Patient Satisfaction Scale(PSS)

Patient Satisfaction Scale(PSS) on a scale ranging from 0 to 10, where 0 denotes "completely dissatisfied" and 10 signifies "extremely satisfied".

Time frame: Postoperative hours 4、12、24 and 48 hours.

Postoperative nausea and vomiting (PONV)

Measured on a scale of 0-3: 0 indicates no nausea, 1 indicates mild nausea that does not require treatment, 2 indicates nausea that requires treatment, and 3 indicates vomiting.

Time frame: Postoperatively within 48 hours

Wound healing score

The wound healing score is evaluated by independent researchers based on the wound healing score table, which includes three aspects: skin healing, incision infection, and hair growth. The total score is obtained by adding up the three scores. Excellent wound healing: 3 points; Good wound healing is 4-5; Poor wound healing: total score greater than or equal to 6 points.

Time frame: Postoperative 72 hours、1 and 3 months

Postoperatively and patient and observer scar assessment scale

Postoperatively and patient and observer scar assessment scale: the observer scores the scar based on the distribution of blood vessels around the incision, color, scar thickness, surface roughness, area, and softness. Each score ranges from 1 to 10 points and higher scores indicating more severe scars; The patient evaluates the scar based on whether there is pain or itching, color, softness, thickness, and self-perception. Each score range is also 1-10 points, with 1 point indicating no difference from normal skin and a higher score indicating more severe scars.

Time frame: Postoperative 72 hours、1 and 3 months

Adverse events

Including local anesthetic poisoning, local hematoma, nausea and vomiting, itching, hypotension, arrhythmia, delirium, etc; Abnormal values in clinical laboratory tests, such as elevated blood glucose levels.

Time frame: Within 72 hours postoperatively