Ropivacaine Dexmedetomidine Research Articles

Dexmedetomidine and Dexamethasone as Adjuvants to the Local Anesthetic Mixture in Rhomboid Intercostal and Sub-Serratus Block for Video-Assisted Thoracoscopic Surgery: A Randomized, Double-Blind, Controlled Trial.

The utilization of adjuvants such as dexamethasone and dexmedetomidine in combination with local anesthetics has proven effective in extending analgesia duration. We aimed to investigate the potential efficacy of combining dexmedetomidine and dexamethasone in rhomboid intercostal and sub-serratus (RISS) block for prolonging postoperative analgesia in patients undergoing video-assisted thoracoscopic surgery (VATS). We did this randomized, double-blind, controlled trial in two tertiary-care hospitals. A total of eighty-eight patients undergoing VATS under general anesthesia were enrolled in this study. They were randomly assigned into four groups: ropivacaine (R) group, ropivacaine + dexmedetomidine (RM) group, ropivacaine + dexamethasone (RS) group, or ropivacaine + dexmedetomidine + dexamethasone (RSM) group. The primary outcome measure was the duration of analgesia. Secondary outcomes included Numeric Rating Scale (NRS) scores, cumulative oxycodone consumption, and adverse effects. The RSM group exhibited a significantly prolonged duration of analgesia at 1073.5min (932.0-1283.3) compared to the R group with a duration of 154.5min (80.5-199.3) and the RS group with a duration of 282.0min (195.3-350.0, P < 0 0.001). The cumulative oxycodone consumption during the 0-12hours and 0-24-hours period was significantly reduced in the RSM group compared to the R group (P < 0.05). There was also a lower incidence of nausea at 48hours postoperatively in the RSM group compared to the RM group. However, there were no significant differences between the four groups regarding NRS pain scores. The combination of ropivacaine, dexmedetomidine, and dexamethasone in RISS block significantly prolongs the duration of postoperative analgesia following VATS.

Comparison of Dexmedetomidine and Ketamine in Serratus Anterior Plane Block for Postoperative Pain Control in Thoracotomy Patients: A Randomized Clinical Trial.

Postoperative pain control after thoracotomy is very important, and if not controlled, it can cause severe complications. This study aimed to compare dexmedetomidine and ketamine in serratus anterior plane block (SAPB) in pain control after thoracotomy. This randomized clinical trial was conducted on 74 patients aged 18 to 60 years old with American Society of Anesthesiologists (ASA) class I or II who were referred to Imam Khomeini hospital in Ahvaz, Iran, for thoracotomy and randomly divided into two groups. After surgery, the SAPB with ultrasound-guided was performed. In the ropivacaine-ketamine (RK) group, ketamine 0.5 mg/kg and 0.4 cc/kg ropivacaine solution 0.25% and in the ropivacaine-dexmedetomidine (RD) group, in addition to 0.4 cc/kg ropivacaine 0.25%, dexmedetomidine 0.5 µg/kg was added. Verbal Numeric Scale (VNS), systolic blood pressure (SBP), diastolic blood pressure (DBP), respiratory rate (RR), heart rate (HR), and mean arterial blood pressure (MAP) were recorded. There was no significant difference in both groups in terms of demographic information (P < 0.05). The average VNS was lower in the ketamine group than in the dexmedetomidine group; however, there was a significant difference only at 1, 12, and 24 hours after surgery (P < 0.05). There was no statistically significant difference between the two groups in terms of SBP and DBP, HR, and MAP. There was a significant difference in the RR in the two groups at 12 and 24 hours after the operation (P < 0.05). Dexmedetomidine and ketamine, which were used as supplements to ropivacaine for SAPB in patients undergoing elective thoracotomy, reduced the pain intensity after thoracotomy; nevertheless, the intensity of pain reduction was more and more effective in the group receiving ketamine.

A comparative evaluation of intraperitoneal instillation and periportal infiltration of 0.375% ropivacaine with dexmedetomidine and nalbuphine as adjuvants for post-operative analgesia in laparoscopic cholecystectomy

Background: Intraperitoneal instillation (IPI) of local anesthetic agents into peritoneal cavity has proved to be an effective method of post-operative analgesia in laparoscopic cholecystectomy (LC). The addition of adjuvants such as narcotics or α2-agonists has been proposed to prolong the duration of post-operative analgesia. Aims and Objectives: This study aimed to compare post-operative analgesia of IPI and periportal infiltration of ropivacaine plus dexmedetomidine with ropivacaine plus nalbuphine in patients undergoing LC. Materials and Methods: This was a comparative, prospective, randomized controlled double-blind study conducted on total of 100 patients (American Society of Anesthesiologists class I and II) planned for LC who were randomly divided into two groups of 50 patients: Group Ropivacaine+Dexmedetomidine (RD) received IPI and periportal infiltration of 150 mg of ropivacaine (0.375%) and dexmedetomidine (1 μg/kg) diluted with normal saline to 40 mL and Group Ropivacaine+Nalbuphine (RN) received 150 mg of ropivacaine (0.375%) and 10 mg nalbuphine diluted with normal saline to 40 mL. Post-operative pain was assessed by Visual Analogue Score, time to first request of analgesia, and total amount of rescue analgesics given in 24 h and side effects were noted. Data were analyzed by Student’s independent t-test and Chi-square test using SPSS version 20.0. Results: Overall Visual Analog Scale scores (1.38±0.78 vs. 2.59±1.15), time to first request of analgesia (7.3±3.74 vs. 4.2±2.71), and total analgesic consumption (82.4±15.34 vs. 158.5±16.19) were significantly lower in the RD group compared to the RN group. Among post-operative adverse events, the incidence of post-operative nausea and vomiting was significantly higher in the RN group. Conclusion: The addition of dexmedetomidine appears to be superior to nalbuphine in terms of prolonged post-operative analgesia, lesser requirement of rescue analgesia, and less complications.

COMPARATIVE EVALUATION OF DEXMEDETOMIDINE AND FENTANYL FOR EPIDURAL ANALGESIA IN LOWER LIMB ORTHOPEDIC SURGERIES

A study conducted between two groups to compare : Ropivacaine + Dexmedetomidine (RD) and Ropivacaine + Fentanyl (RF), comprising 50 patients each. Inj. Ropivacaine, 15 ml of 0.75%, was administered epidurally in both the groups with addition of 1 μg/kg of dexmedetomidine in RD group and 1 ฀g/kg of fentanyl in RF group. Besides cardio-respiratory parameters and sedation scores, various block characteristics were also observed. The study was compiled systematically and analyzed using ANOVA with post-hoc signicance, Chisquare test and Fisher's exact test. Value of P&lt;0.05 is considered signicant and P&lt;0.001 as highly signicant.As compared both groups.RD group was signicantly earlier in establishment of complete motor blockade, sensory analgesia at T10. Postoperatively sedation better in RD group. Incidence of nausea and vomiting was signicantly high in the RF group, while incidence of dry mouth was signicantly higher in the RD group. At the end of study Dexmedetomidine seems to be a better alternative to fentanyl as an epidural adjuvant.

Postoperative analgesic effect of dexmedetomidine combined with TPVB applied to open gastrectomy for gastric cancer

Objectives This study is aimed to investigate the analgesic effect of combined dexmedetomidine and thoracic paravertebral nerve block (TPVB) on gastric cancer (GC) patients undergoing open gastrectomy. Methods From May 2019 to Nov 2020, a total of 80 GC patients preparing for open gastrectomy were enrolled in our hospital and were divided into the ropivacaine (RO) group and the ropivacaine + dexmedetomidine (RD) group ad libitum. All of the patients underwent TPVB. The characteristics, usage of patient-controlled analgesia (PCA), adverse events, visual analogue scale (VAS) scores, inflammatory cytokines, and T cell subgroups between the two groups were compared. Results Patients in the RD group showed the decreased occurrence rate of postoperative adverse events and VAS scores and improved anti-inflammation and immune function. These findings implied that the application of dexmedetomidine in combination with RO in TPVB has a good postoperative analgesic effect, as well as anti-inflammatory and immune-enhancing effects. Conclusions Dexmedetomidine as an adjunct analgesic may be potentially applied in clinical practice for GC patients undergoing open gastrectomy.

Influence of Epidural Ropivacaine with or without Dexmedetomidine on Postoperative Analgesia and Patient Satisfaction after Thoraco-Lumbar Spine Instrumentation: A Randomized, Comparative, and Double-Blind Study.

Study DesignThis was a prospective, randomized, and double-blind study.PurposeThoraco-lumbar spine surgery is associated with severe postoperative pain and can cause chronic pain. We aimed to compare the impact of epidural ropivacaine with and without dexmedetomidine on postoperative analgesia after thoracolumbar spine instrumentation wherein an epidural catheter was placed by the surgeon intraoperatively.Overview of LiteratureVery few studies have reported the use of epidural dexmedetomidine in spine surgeries. When used via the epidural route, dexmedetomidine is safe and efficacious and is associated with reduced rescue analgesia consumption, increased duration of analgesia, reduced pain scores, but not with major hemodynamic adverse effects.MethodsTotal 60 American Society of Anesthesiologists I–III adult patients aged 18–65 years who were scheduled to undergo thoraco-lumbar spine instrumentation were randomly allocated into group RD (epidural ropivacaine+dexmedetomidine) or group R (epidural ropivacaine plus saline). We aimed to compare the total rescue analgesic consumption on postoperative day 0, 1, and 2. Moreover, we studied the time to first rescue analgesia with visual analogue scale score <4 and the overall patient satisfaction scores.ResultsThere was no difference between the demographic characteristics of the two groups. The mean value of total rescue analgesia consumption was 162.5±68.4 mg in the RD group and 247.5±48.8 mg in the R group. The mean time to first rescue analgesia was 594.6±83.0 minutes in the RD group and 103.6±53.2 minutes in the R group. The mean patient satisfaction score was 4.2±0.7 in the RD group and 3.2±0.6 in the R group. No patient had any respiratory depression or prolonged motor blockade during the postoperative period.ConclusionsThis study demonstrated the superior efficacy, in terms of postoperative analgesia and patient satisfaction scores, of epidural ropivacaine plus dexmedetomidine over that of ropivacaine alone in patients undergoing surgery for thoraco-lumbar spine.

Efficacy of dexmedetomidine used as an adjuvant to 0.5% ropivacaine in ultrasound-guided supraclavicular brachial plexus block for upper limb surgeries

Background: Supraclavicular brachial plexus block (SCBPB) has gained popularity with the addition of various adjuncts to local anesthetics. This study aimed to evaluate the efficacy of dexmedetomidine as an adjuvant to 0.5% ropivacaine in ultrasound-guided (USG) SCBPB. Materials and Methods: One hundred patients of either sex, belonging to the American Society of Anesthesiologists physical status I or II, aged between 15 and 65 years and scheduled for elective upper arm surgery under USG SCBPB were enrolled. Patients were randomly allocated into two groups (n = 50). Both groups received 16 ml (120 mg) 0.75% ropivacaine with 1 μg/kg dexmedetomidine diluted in 8 ml normal saline (NS) (Group Ropivacaine Dexmedetomidine [RD]) or with 8 ml NS only (Group R). The primary outcome measure was the duration of analgesia, whereas secondary outcome measures were onset and duration of sensory and motor block, quality of anesthesia, sedation score, hemodynamic changes, and side effects. Statistical analysis was performed using unpaired Student's t-test or nonparametric Mann–Whitney test and Chi-square test. Results: The duration of analgesia was significantly prolonged in Group RD (730.70 ± 51.62 min) compared to Group R (388.30 ± 41.66 min), (P 0.05). Conclusion: Dexmedetomidine provides the prolonged duration of analgesia along with faster onset as well as prolonged duration of both sensory and motor block without any significant hemodynamic changes and side effects.

Comparing Effects of Intrathecal Adjuvants Fentanyl and Dexmedetomidine with Hyperbaric Ropivacaine in Patients Undergoing Elective Infraumbilical Surgeries: A Prospective, Double-Blind, Clinical Study.

Background:Spinal anesthesia is most commonly used anesthesia technique for infraumbilical surgeries, and it is cost-effective with decreased hospital stay. Intrathecal isobaric ropivacaine has shorter duration of anesthesia than bupivacaine. By making, ropivacaine hyperbaric will help to achieve dense block with good postoperative analgesia.Materials and Methods:Ninety patients with American Society of Anesthesiologists physical status Classes I and II, aged between 18 and 60 years of either sex, undergoing for elective infraumbilical surgeries were randomly allocated into three groups 30 each (n = 30). Group Ropivacaine + Dexmedetomidine (RD) received 2.5 ml of 0.5% hyperbaric ropivacaine (15 mg) + dexmedetomidine 10 μg (0.5 ml), Group Ropivacaine + Fentanyl (RF) received 2.5 ml of 0.5% hyperbaric ropivacaine (15 mg) + fentanyl 25 μg (0.5 ml), and Group Ropivacaine + Normal saline (RC) received 2.5 ml of 0.5% hyperbaric ropivacaine (15 mg) +0.5 ml of normal saline. The onset, extent, and duration of sensory and motor block, duration of rescue analgesia, hemodynamic parameters, and side effects such as nausea, vomiting, pruritus, and shivering were recorded.Results:Time of onset early in RD (1.673 ± 0.567), in RF (1.73 ± 0.520), and in RC (1.763 ± 0.420) min (P = 0.783). Time to achieve maximum level of sensory block in RD (5.94 ± 1.88), in RF (3.86 ± 1.22), and RC (5.99 ± 0.46) min (P < 0.001). The total duration of analgesia in Group RD (356.67 ± 63.022), in RF (255.10 ± 35.626), and in RC (197.67 ± 37.605) min (P < 0.001). The time onset and duration of motor block in Group RD (1.59 ± 0.59, 319.57 ± 64.752), Group RF (1.59 ± 0.53, 236.83 ± 33.797), and Group RC (2.07 ± 0.20, 183.93 ± 35.252) min both are statistically highly significant (P < 0.001).Conclusion:Addition of glucose to ropivacaine makes the block dense. Addition of adjuvants such as dexmedetomidine and fentanyl further hastens the onset; prolong the postoperative analgesia with minimal hemodynamic and other side effects.

Comparison of Efficacy of Intraperitoneal Instillation of Ropivacaine with Ropivacaine Dexmedetomidine Combination for Post-Operative Analgesia Following Laparoscopic Cholecystectomy

Comparison of Efficacy of Intraperitoneal Instillation of Ropivacaine with Ropivacaine Dexmedetomidine Combination for Post-Operative Analgesia Following Laparoscopic Cholecystectomy

A comparative study in the post-operative spine surgeries: Epidural ropivacaine with dexmedetomidine and ropivacaine with clonidine for post-operative analgesia.

Background:Anaesthesia for spine surgeries is not only concerned with relieving pain during surgeries but also during the post-operative period. A prospective randomised study was carried out to evaluate the efficacy of epidural route and to compare the efficacy and clinical profile of dexmedetomidine and clonidine as an adjuvant to ropivacaine, in epidural analgesia with special emphasis on their quality of analgesia and the ability to provide the smooth post-operative course.Methods:A total of 60 subjects, 33 were men and 27 were women between the age of 18 and 65 years of American Society of Anaesthesiologists (ASA) I/II class who underwent spine surgeries were randomly allocated into two groups, ropivacaine + dexmedetomidine (RD) and ropivacaine + clonidine (RC), comprising 30 patients each. Group RD received 20 ml of 0.2% ropivacaine and 1 μg/kg of dexmedetomidine while group RC received 20 ml of 0.2% ropivacaine and 2 μg/kg of clonidine through the epidural catheter. Onset of analgesia, time of peak effect, duration of analgesia, cardiorespiratory parameters, side-effects and need of rescue intravenous (IV) analgesics were observed.Results:The demographic profile and ASA class were comparable between the groups. None of the patients needed rescue analgesics in either group. Group RD had early onset, early peak effect, prolonged duration and stable cardiorespiratory parameters when compared with group RC. The side-effects profile was also comparable with a little higher incidence of nausea and dry mouth in both groups.Conclusion:Epidural route provided acceptable analgesia in spine surgeries and avoided the need of IV analgesics in either group. Dexmedetomidine is a better neuraxial adjuvant compared with clonidine for providing early onset and prolonged post-operative analgesia and stable cardiorespiratory parameters.

Comparative evaluation of dexmedetomidine and fentanyl for epidural analgesia in lower limb orthopedic surgeries

Background and Aims:Opioids as epidural adjunct to local anesthetics (LA) have been in use since long and α-2 agonists are being increasingly used for similar purpose. The present study aims at comparing the hemodynamic, sedative, and analgesia potentiating effects of epidurally administered fentanyl and dexmedetomidine when combined with ropivacaine.Methods:A total of one hundred patients of both gender aged 21-56 years, American Society of Anaesthesiologist (ASA) physical status I and II who underwent lower limb orthopedic surgery were enrolled into the present study. Patients were randomly divided into two groups: Ropivacaine + Dexmedetomidine (RD) and Ropivacaine + Fentanyl (RF), comprising 50 patie nts each. Inj. Ropivacaine, 15 ml of 0.75%, was administered epidurally in both the groups with addition of 1 μg/kg of dexmedetomidine in RD group and 1 μg/kg of fentanyl in RF group. Besides cardio-respiratory parameters and sedation scores, various block characteristics were also observed which included time to onset of analgesia at T10, maximum sensory analgesic level, time to complete motor blockade, time to two segmental dermatomal regressions, and time to first rescue analgesic. At the end of study, data was compiled systematically and analyzed using ANOVA with post-hoc significance, Chi-square test and Fisher's exact test. Value of P<0.05 is considered significant and P<0.001 as highly significant.Results:The demographic profile of patients was comparable in both the groups. Onset of sensory analgesia at T10 (7.12±2.44 vs 9.14±2.94) and establishment of complete motor blockade (18.16±4.52 vs 22.98±4.78) was significantly earlier in the RD group. Postoperative analgesia was prolonged significantly in the RD group (366.62±24.42) and consequently low dose consumption of local anaesthetic LA (76.82±14.28 vs 104.35±18.96) during epidural top-ups postoperatively. Sedation scores were much better in the RD group and highly significant on statistical comparison (P<0.001). Incidence of nausea and vomiting was significantly high in the RF group (26% and 12%), while incidence of dry mouth was significantly higher in the RD group (14%) (P<0.05).Conclusions:Dexmedetomidine seems to be a better alternative to fentanyl as an epidural adjuvant as it provides comparable stable hemodynamics, early onset, and establishment of sensory anesthesia, prolonged post-op analgesia, lower consumption of post-op LA for epidural analgesia, and much better sedation levels.

Dexmedetomidine and clonidine in epidural anaesthesia: A comparative evaluation

Efforts to find a better adjuvant in regional anaesthesia are underway since long. Aims and objectives are to compare the efficacy and clinical profile of two α-2 adrenergic agonists, dexmedetomidine and clonidine, in epidural anaesthesia with special emphasis on their sedative properties and an ability to provide smooth intra-operative and post-operative analgesia. A prospective randomized study was carried out which included 50 adult female patients between the ages of 44 and 65 years of (American Society of Anaesthesiologists) ASAI/II grade who underwent vaginal hysterectomies. The patients were randomly allocated into two groups; ropivacaine + dexmedetomidine (RD) and ropivacaine + clonidine (RC), comprising of 25 patients each. Group RD was administered 17 ml of 0.75% epidural ropivacaine and 1.5 μg/kg of dexmedetomidine, while group RC received admixture of 17 ml of 0.75% ropivacaine and 2 μg/kg of clonidine. Onset of analgesia, sensory and motor block levels, sedation, duration of analgesia and side effects were observed. The data obtained was subjected to statistical computation with analysis of variance and chi-square test using statistical package for social science (SPSS) version 10.0 for windows and value of P < 0.05 was considered significant and P < 0.0001 as highly significant. The demographic profile, initial and post-operative block characteristics and cardio-respiratory parameters were comparable and statistically non-significant in both the groups. However, sedation scores with dexmedetomidine were better than clonidine and turned out to be statistically significant (P < 0.05). The side effect profile was also comparable with a little higher incidence of nausea and dry mouth in both the groups which was again a non-significant entity (P > 0.05). Dexmedetomidine is a better neuraxial adjuvant compared to clonidine for providing early onset of sensory analgesia, adequate sedation and a prolonged post-operative analgesia.