scholarly journals Comparison of bupivacaine and bupivacaine plus magnesium sulphate infiltration for postoperative analgesia in patients undergoing lumbar laminectomy: A prospective randomised double-blinded controlled study

2014 ◽  
Vol 01 (03) ◽  
pp. 183-187 ◽  
Author(s):  
Praveen Donadi ◽  
Srilata Moningi ◽  
Ramachandran Gopinath
Keyword(s):  
Side Effects ◽  
Postoperative Pain ◽  
Postoperative Analgesia ◽  
Normal Saline ◽  
Magnesium Sulphate ◽  
Controlled Study ◽  
Surgical Trauma ◽  
Analgesic Consumption ◽  
Paravertebral Muscles ◽  
Chi Square Analysis

AbstractBackground: Laminectomy is associated with considerable postoperative pain. Providing analgesia locally in the area of surgical trauma, with minimal systemic side effects, is an attractive option and has become an integral part of multimodal analgesia. The objective of this study was to assess and compare the effectiveness and safety of local infiltration of bupivacaine and bupivacaine plus magnesium sulphate for postoperative analgesia in patients undergoing lumbar laminectomy. Materials and Methods: Sixty adult patients of the American Society of Anaesthesiologists (ASA) class 1 and 2 were randomly allocated into two groups, comprising 30 patients in each group. After the completion of lumbar laminectomy, the study drug was locally infiltrated into the paravertebral muscles on either side. Group bupivacaine with magnesium (BM) was given 20 ml of 0.25% bupivacaine with 500 mg of magnesium sulphate (constituted with normal saline); and Group bupivacaine (B) was given 20 ml of 0.25% bupivacaine constituted with normal saline. Postoperative visual analogue scale (VAS) pain scores at 1, 2, 4, 6, 8, 12 and 24 hours; rescue analgesia, the time to first analgesic consumption, degree of overall patient satisfaction and side effects were recorded. Comparison of continuous data between groups was done using independent T-test. Comparison of nominal data was done using Chi-square analysis and ordinal data using Mann-Whitney test. A P value less than 0.05 was considered significant. Results: Time to first analgesic consumption was significantly longer in BM group (7.78 ± 1.350 hours) compared to B group (4.62 ± 0.997 hours) (P < 0.0001). The consumption of Tramadol was significantly higher in B group (202.5 ± 76.9 mg) compared to BM (117.5 ± 63.4 mg) (P < 0.0001). The degree of overall satisfaction with postoperative pain management on a 4-point satisfaction scale was better in BM group (2.77 ± 0.626) compared to B group (2.0 ± 0.587) (P < 0.001). Conclusion: Wound infiltration with bupivacaine and magnesium sulphate provided better pain control and analgesic effect was more significant, providing effective and safe postoperative analgesia in patients undergoing laminectomy surgeries.

scholarly journals Post-operative wound infiltration with dexmedetomidine and magnesium sulphate as adjuvant to levobupivacaine for lumbar laminectomy: a prospective, double blinded, randomized controlled study

2021 ◽  
Vol 9 (4) ◽  
pp. 1028
Author(s):  
Neelesh Bhatnagar ◽  
Vikram S. Rathore ◽  
Malavsinh Jadeja ◽  
Alka Chhabra ◽  
Seema Partani ◽  
...  
Keyword(s):  
Postoperative Analgesia ◽  
Normal Saline ◽  
Magnesium Sulphate ◽  
Saline Group ◽  
Controlled Study ◽  
Normal Saline Group ◽  
Analgesic Drug ◽  
Wound Infiltration ◽  
Paravertebral Muscles ◽  
Double Blinded

Background: Wound infiltration with local anaesthetic is safe and effective technique for providing postoperative analgesia following lumbar laminectomy. The objective of this study was to compare the efficacy of local wound infiltration on postoperative analgesia with levobupivacaine, levobupivacaine plus magnesium sulphate and levobupivacaine plus dexmedetomidine in patient undergoing lumbar laminectomy.Methods: Ninety adult patients were randomly allocated into three groups. After the completion of lumbar laminectomy, the drug was locally infiltrated into the paravertebral muscles on either side. Group L received 10 ml of 0.5% levobupivacaine plus 10 ml normal saline, group LM received 10 ml of 0.5% levobupivacaine plus 500 mg magnesium sulphate (1 ml) plus 9 ml normal saline, group LD received 10 ml of 0.5% levobupivacaine plus 50 µg dexmedetomidine (0.5 ml) plus 9.5 ml normal saline. Postoperative visual analogue scale (VAS) pain score at 0, 1, 2, 4, 6, 8, 12 and 24 hours, time to first rescue analgesic drug and its total dose, quality of recovery score (QoR) and side effects were noted.Results: Postoperative VAS was significantly higher in group L as compared to group LM and LD (p<0.05). The time to first rescue analgesic drug was significantly longer in group LD (11.07±7.20 hr) than group LM (6.20±2.64 hr) and group L (3.93±2.70 hr) (p<0.001). The QoR score was significantly better in group LD as compared to group LM and L postoperatively (<0.01).Conclusions: Addition of magnesium sulphate or dexmedetomidine to levobupivacaine for local wound infiltration demonstrated enhanced postoperative analgesia. 

scholarly journals Effect of Dexamethasone as an Adjuncton Efficacy of Ropivacaine in Caudal Block forPostoperative Analgesia in Paediatric Infra-Umbilical Surgeries: A Randomised Double-blind Controlled Study

2021 ◽  
Author(s):  
Veena Patodi ◽  
Kavita Jain ◽  
Mukesh Choudhary ◽  
Surendra Kumar Sethi ◽  
Neena Jain ◽  
...  
Keyword(s):  
Side Effects ◽  
Postoperative Analgesia ◽  
Controlled Study ◽  
P Value ◽  
Single Shot ◽  
Caudal Block ◽  
Analgesic Consumption ◽  
Pain Scores ◽  
Paediatric Patients ◽  
Haemodynamic Changes

Introduction: Caudal block is a routinely performed analgesic and anaesthetic technique in paediatric population undergoing various infra-umbilical surgeries. Various adjuvants have been used along with local anaesthetics like ropivacaine in single-shot caudal block for enhancing postoperative analgesia in paediatric infra-umbilical surgeries. Aim: To evaluate the efficacy of dexamethasone used as an adjuvant to 0.2% ropivacaine in caudal block for postoperative analgesia in paediatric patients. Materials and Methods: This was a randomised doubleblinded controlled study conducted on 80 paediatric patients (8 months-8 years), with American Society of Anesthesiologists (ASA) physical status I or II undergoing various infra-umbilical surgeries,at a tertiary care teaching institute from April 2019 to September 2019. These total subjects were randomly allocated into two groups. GroupR (n=40) administered 0.2% ropivacaine (1 mL/kg) while GroupRD (n=40) administered 0.2% ropivacaine (1 mL/kg) with dexamethasone (0.1 mg/kg) in caudal block. The duration of analgesia, postoperative pain scores (Face Legs Activity Cry Consolability (FLACC) score), rescue analgesic consumption in 24 hours, haemodynamic changes and side-effects were noted. The rescue analgesic (paracetamol 15 mg/kg oral) was given whenever FLACC ≥4. Standard qualitative and quantitative tests (unpaired student t-test, Chi-square test) were used to analyse and compare the results obtained. Results: The mean duration of analgesia was significantly longer in Group RD (745.21±146.91 min) as compared to GroupR (440.38±76.44 min); (p-value <0.001). The significantly lower FLACC pain scores were noted in patients in Group RD compared to Group R; (p-value <0.05). The rescue analgesic consumption was significantly lesser in Group RD in terms of requirement of number of doses of rescue analgesic than in Group R; (p-value <0.05). No significant haemodynamic changes or side-effects were observed in both groups; (p-value >0.05). Amongst postoperative complications noted, fever was observed in 1 patient (3.33%) and PONV in 2 patients (6.66%) in Group R. None complications were observed in the patients of RD group. Conclusion: Dexamethasone (0.1 mg/kg) was found to be safe and effective adjuvant to 0.2% ropivacaine for caudal block in children undergoing various infra-umbilical surgeries.

scholarly journals Efficacy of Perineural versus Systemic Dexamethasone to prolong analgesia after Supraclavicular Nerve Block in patients undergoing Wrist Arthroscopy

QJM ◽  
2020 ◽  
Vol 113 (Supplement_1) ◽  
Author(s):  
A E Mohammed ◽  
A A Abdellatif ◽  
H Shokry ◽  
A A N H Refaat
Keyword(s):  
Side Effects ◽  
Postoperative Pain ◽  
Nerve Block ◽  
Postoperative Analgesia ◽  
Normal Saline ◽  
Sensory Block ◽  
Postoperative Pain Management ◽  
Wrist Arthroscopy ◽  
Analgesic Requirement ◽  
Group 2

Abstract Background Poorly controlled acute pain after surgery is associated with a varity of unwanted postoperative consequences, including patient suffering, distress, myocardial ischemia, prolonged hospital stay and increase of chronic pain. Neuroaxial block is used for postoperative pain management and decrease analgesic use. Wrist arthroscopy is a very common surgery and performed as a day case surgery and need good postoperative analgesia. Many adjuvant drugs are added to bupivacaine to prolong the duration of sensory block like opioids and dexamethasone. Objective The aim of this thesis was to study the effect of adding both perineural & systemic dexamethasone as an adjuvant to bupivacaine in supraclavicualr nerve block. The comparison included the the effect on hemodynamics, postoperative pain & postoperative analgesic requirement. Methods In our study, 40 patients were randomly divided into two equal groups: Group #1 (20 patients): Block with 18 ml Bupivacaine 0.5% (+ 2 ml Dexamethasone ‘8 mg’) & 2 ml normal saline was injected IV. Group #2 (20 patients): Block with 18 ml Bupivacaine 0.5% (+ 2 ml normal saline) & 2 ml Dexamethasone ‘8 mg’ was injected IV. Results Our study showed that addition of 8 mg dexamethasone to bupivacaine in supraclavicular nerve block whether perineural or intravenous prolonged postoperative analgesia with negligible side effects however, slight better outcome for the perineural route. Conclusion Dexamethasone was seen to be a potent adjunct to local anaesthetic to prolong post operative analgesia with negligible side effects with slightly better outcome to the perineural route.

Postoperative analgesia by adding acupuncture to conventional therapy, a non-randomized controlled trial

2018 ◽  
Vol 16 (2) ◽  
Author(s):  
Ilana Levy ◽  
Samuel Attias ◽  
Lior Cohen ◽  
Nadav Stoppelmann ◽  
Dan Steinberger ◽  
...  
Keyword(s):  
Side Effects ◽  
Postoperative Pain ◽  
Analgesic Effect ◽  
Pain Treatment ◽  
Standard Of Care ◽  
Acupuncture Group ◽  
Controlled Study ◽  
Control Group ◽  
Pain Level ◽  
Randomized Controlled

Abstract Background Postoperative pain is common in patients hospitalized in surgical departments, yet it is currently not sufficiently controlled by analgesics. Acupuncture, a complementary medical practice, has been evaluated for its benefits in postoperative pain with heterogeneous results. We tested the feasibility of a controlled study comparing the postoperative analgesic effect of acupuncture together with standard-of-care to standard-of-care only. Methods In this pilot non-randomized controlled study conducted at a tertiary medical center in Israel, patients received either acupuncture with standard-of-care pain treatment (acupuncture group) or standard-of-care treatment only (control group) following surgery. Visual Analogue Scale (VAS) ratings for pain level at rest and in motion were evaluated both at recruitment and two hours after treatment. Acupuncture-related side effects were reported as well. Results We recruited 425 patients; 336 were assigned to the acupuncture group and 89 to the control group. The acupuncture group exhibited a decrease of at least 40% in average level of pain both at rest (1.8±2.4, p<0.0001) and in motion (2.1±2.8, p<0.0001) following acupuncture, whereas the control group exhibited no significant decrease (p=0.92 at rest, p=0.98 in motion). Acupuncture's analgesic effect was even more prominent in reducing moderate to severe pain at baseline (VAS ≥4), with a decrease of 49% and 45% of pain level at rest and in motion respectively (p<0.001), compared with no significant amelioration in the control group (p=0.20 at rest, p=0.12 in motion). No major side effects were reported. Conclusion Integrating acupuncture with standard care may improve pain control in the postoperative setting.

scholarly journals Perioperative pregabalin for reducing pain, analgesic consumption, and anxiety and enhancing sleep quality in elective neurosurgical patients: a prospective, randomized, double-blind, and controlled clinical study

2016 ◽  
Vol 125 (6) ◽  
pp. 1513-1522 ◽  
Author(s):  
Nir Shimony ◽  
Uri Amit ◽  
Bella Minz ◽  
Rachel Grossman ◽  
Marc A. Dany ◽  
...  
Keyword(s):  
Postoperative Pain ◽  
Sleep Quality ◽  
Rating Scale ◽  
Preoperative Anxiety ◽  
Controlled Study ◽  
Double Blind ◽  
Analgesic Consumption ◽  
Pain Scores ◽  
Neurosurgical Patients ◽  
Duration Of Surgery

OBJECTIVE The aim of this study was to assess in-hospital (immediate) postoperative pain scores and analgesic consumption (primary goals) and preoperative anxiety and sleep quality (secondary goals) in patients who underwent craniotomy and were treated with pregabalin (PGL). Whenever possible, out-of-hospital pain scores and analgesics usage data were obtained as well. METHODS This prospective, randomized, double-blind and controlled study was conducted in consenting patients who underwent elective craniotomy for brain tumor resection at Tel Aviv Medical Center between 2012 and 2014. Patients received either 150 mg PGL (n = 50) or 500 mg starch (placebo; n = 50) on the evening before surgery, 1.5 hours before surgery, and twice daily for 72 hours following surgery. All patients spent the night before surgery in the hospital, and no other premedication was administered. Opioids and nonsteroidal antiinflammatory drugs were used for pain, which was self-rated by means of a numerical rating scale (score range 0–10). RESULTS Eighty-eight patients completed the study. Data on the American Society of Anesthesiologists class, age, body weight, duration of surgery, and intraoperative drugs were similar for both groups. The pain scores during postoperative Days 0 to 2 were significantly lower in the PGL group than in the placebo group (p < 0.01). Analgesic consumption was also lower in the PGL group, both immediately and 1 month after surgery. There were fewer requests for antiemetics in the PGL group, and the rate of postoperative nausea and vomiting was lower. The preoperative anxiety level and the quality of sleep were significantly better in the PGL group (p < 0.01). There were no PGL-associated major adverse events. CONCLUSIONS Perioperative use of twice-daily 150 mg pregabalin attenuates preoperative anxiety, improves sleep quality, and reduces postoperative pain scores and analgesic usage without increasing the rate of adverse effects. Clinical trial registration no.: NCT01612832 (clinicaltrials.gov)

scholarly journals Intermittent Subcutaneous Morphine for Postoperative Analgesia Following Coronary Artery Bypass Grafting

2020 ◽  
Author(s):  
CN Namitha ◽  
Manjunath R Kamath ◽  
Ananda Bangera ◽  
M Gopala Krishnan ◽  
B Amith Kiran
Keyword(s):  
Coronary Artery ◽  
Coronary Artery Bypass Grafting ◽  
Side Effects ◽  
Postoperative Pain ◽  
Coronary Artery Bypass ◽  
Postoperative Analgesia ◽  
Artery Bypass ◽  
P Value ◽  
Bypass Grafting ◽  
Artery Bypass Grafting

Introduction: An effective postoperative pain management is of utmost importance following cardiac surgery. Various agents, routes and modes are available for the treatment of postoperative pain. Subcutaneous route of administration is an easy and effective method of postoperative analgesia with improved patient satisfaction and lesser side effects compared to intravenous route. Aim: To evaluate the efficacy of Subcutaneous Morphine (SCM) as postoperative analgesia following Coronary Artery Bypass Grafting (CABG). Materials and Methods: This study was designed as a retrospective analytical survey from June 2015 to June 2017. Medical records of all patients over 18 years of age who underwent coronary artery bypass grafting were reviewed. Patients belonging to ASA PS I, II and III, patients above 18 years of age and those posted for coronary artery bypass grafting were included in the study. Patients were divided into two groups: SCM group and Paracetamol (PCT) group, depending on the primary analgesia they received. The two groups were compared using Student’s t-test for normally distributed continuous data or non-parametric tests if the data were not normally distributed. Categorical data were compared by Fisher’s-exact test. The p-values <0.05 were considered statistically significant. Results: A total of 102 records were reviewed, out of which 49 patients received SCM and 53 patients had received PCT as their primary postoperative analgesia. It was observed that PCT group required more additional analgesia (intravenous fentanyl/ tramadol) than SCM group which was statistically significant with p-value of <0.001 and the duration of Cardiac Intensive Care Unit (CICU) stay was more in PCT group with p-value of 0.001. Postoperative side effects were significantly more in PCT group. Conclusion: SCM can be effectively administered intermittently for postoperative analgesia following CABG with similar haemodynamic stability and minimal side effects as compared to intermittent intravenous PCT.

scholarly journals Postoperative Analgesia for Haemorrhoid Surgery

1983 ◽  
Vol 11 (1) ◽  
pp. 27-30 ◽  
Author(s):  
D. A. Pybus ◽  
B. E. D'Bras ◽  
G. Goulding ◽  
H. Liberman ◽  
T. A. Torda
Keyword(s):  
Postoperative Pain ◽  
General Anaesthesia ◽  
Postoperative Analgesia ◽  
Normal Saline ◽  
Morphine Sulphate ◽  
Control Group ◽  
Treatment Groups ◽  
Number Of Patients ◽  
Caudal Analgesia ◽  
The Mean

Seventy patients undergoing haemorrhoidectomy under general anaesthesia were randomly allocated to one of five treatment groups in order to compare the effectiveness of various caudal agents in the control of postoperative pain. Four groups were given a caudal injection of either 2% lignocaine, 0.5% bupivacaine, 2% lignocaine + morphine sulphate 4 mg or normal saline + morphine sulphate 4 mg, while the fifth (control) group did not receive an injection. The number of patients requiring postoperative opiates was significantly higher in the lignocaine group than in the morphine (p <0.05) and morphine-lignocaine (p <0.05) groups. No agent significantly reduced the number requiring opiates. In those who received opiates, the mean analgesic period was 228 minutes in the control group, and was significantly longer following bupivacaine (577 min, p <0.01), morphine-lignocaine (637 min, p <0.05) and morphine (665 min, p <0.01). The mean analgesic period following lignocaine (349 min) was not significantly different from control. The incidence of catheterisation was lowest in those patients who did not receive caudal analgesia.

Postoperative analgesia after radical prostatectomy with high-dose intrathecal morphine and intravenous naloxone: A retrospective review

2018 ◽  
Vol 5 (6) ◽  
pp. 331-339 ◽  
Author(s):  
Annette Rebel, MD ◽  
Paul Sloan, MD ◽  
Michael Andrykowski, PhD
Keyword(s):  
Side Effects ◽  
Postoperative Pain ◽  
Pain Relief ◽  
Radical Prostatectomy ◽  
Respiratory Depression ◽  
Postoperative Analgesia ◽  
Intrathecal Morphine ◽  
Major Surgery ◽  
High Dose ◽  
The Mean

Background and methods: Intrathecal opioids (ITOs) have been used for decades to control postoperative pain. Intrathecal opioid dosing is limited, however, by opioid-related side effects, most importantly respiratory depression. To overcome these limitations, we combined intrathecal morphine with a continuous intravenous (IV) postoperative naloxone infusion to control opioid-related side effects. The purpose of this study is to document the efficacy and safety of high-dose intrathecal morphine combined with postoperative naloxone infusion to provide postoperative analgesia after major surgery. After IRB approval, a retrospective chart analysis was performed on 35 patients who had a radical prostatectomy from 2004 to 2006. All patients received a single injection of ITOs before anesthesia, a typical general anesthestic, followed by naloxone infusion at 5 μg/kg/h started 1 hour post-ITOs and continued for 22 hours postoperatively. The following information was collected: patient age, height, weight, anesthesia technique/time, and dose of ITOs given. Postoperative pain relief was assessed for 48 hours using the Visual Analog Score (VAS) for pain (0, no pain; 10, worst pain), perioperative opioid use, NSAID consumption, and ability of patient to ambulate. The safety of this novel treatment was assessed with opioid-related side effects and vital signs. All data are reported as mean (SD).Results: Mean ITOs given were morphine 1.3 (0.3) mg combined with fentanyl 56 (9) μg. The intrathecal morphine dose ranged from 0.8 to 1.7 mg. The mean worst pain VAS in the first 12 hours postoperatively was only 1.0 (1.7). The first NSAID dose was given 6.6 (3.1) hours post-ITOs. The first opioid on the floor was given an average of 22.6 (14.5) hours post-ITOs. A mean of only 5.7 (12.3) morphine equivalents were required on postoperative day 1 (POD 1). On POD 2, the mean worst pain VAS was only 2.6 (2.2) with only 5.7 (6.2) morphine equivalents needed to provide pain relief. On POD 1, 25 patients required no additional opioids for their entire hospital stay. Overall, 11 of 35 patients did not require any additional postoperative opioids. Thirtyfour patients (97 percent) were able to ambulate in the first 12 hours postoperatively. No opioid-induced respiratory depression was observed. Opioid-related side effects (pruritus, nausea) were infrequent and minor.Conclusions: High-dose ITOs combined with postoperative IV naloxone infusion provided excellent analgesia for radical prostate surgery. IV naloxone infusion appeared to control opioid side effects without diminishing the analgesia. No serious adverse effects were noted.

scholarly journals Postoperative analgesia after lumbar disc surgery: A comparison between ketorolac and opioid

2014 ◽  
Vol 23 (2) ◽  
pp. 56-61
Author(s):  
Md Mustafa Kamal ◽  
Abdullah Al Maruf ◽  
Sabina Yeasmeen ◽  
Abdul Hye
Keyword(s):  
Side Effects ◽  
Postoperative Pain ◽  
Urinary Retention ◽  
Postoperative Analgesia ◽  
Lumbar Spine Surgery ◽  
Surgical Closure ◽  
Group A ◽  
The Mean ◽  
Group B ◽  
Post Operative Nausea

Background Most spinal surgery is painful and good postoperative analgesia is important. Opioids are the traditional first-line treatment. Ketorolac has been used for postoperative pain relief. However, there is no data available about controlling postoperative pain with ketorolac after open lumbar discectomy or laminectomy in Bangladesah. Objective To compare the efficacy of a Parentral ketorolac with conventional opioid for management of postoperative pain after lumbar disectomy or laminectomy. Methods Sixty patients who underwent lumbar disectomy or laminectomy were randomly allocated into two groups. Group A (n = 30) patients received 30 mg intramuscular ketorolac upon surgical closure and every 6 hours for 24 hours and intramuscular pethidine 1.5 mg/kg/b.w. as needed (PRN). Group B (n = 30) patients received only intramuscular pethidine 1.5 mgkg-1/b.w. every 6 hours for 24 hours and as needed (PRN). Postoperative analgesia was assessed in both groups by Visual Analogue Scale at arrival in postoperative ward and at 6, 12 and 24 hours for 24 hours. Total postoperative narcotic consumption and side effects like post operative nausea and vomiting (PONV), dizziness, urinary retention and pruritus were also recorded. Results Baseline data were comparable between the two groups. The mean VAS almost similar and less than 3 at different reading in both groups which indicate adequate postoperative analgesia and the differences were statistically not significant. The mean total cumulative amount of pethidine administered over 24 hrs period was less in group A it was 64.31+19.13 mg where as in group B was 161.23+21.25 mg. and the difference was statistically significant (p<0.01). Incidences of side effects like PONV, urinary retention and pruritus were more in group B than group A and differences were statistically significant (p<0.01). Conclusion For postoperative pain management after lumbar spine surgery both ketorolac and traditional parental opioid found effective. Total opioid consumption is significantly less with ketorolac and side effects like PONV, dizziness, urinary retention and pruritus were more with opioid alone. DOI: http://dx.doi.org/10.3329/jbsa.v23i2.18175 Journal of BSA, 2009; 23(2): 56-61

scholarly journals Comparison of the Effects of Adding Dexmedetomidine Versus Midazolam to Intrathecal Bupivacaine on Postoperative Analgesia

2015 ◽  
Vol 18;1 (1;1) ◽  
pp. 71-77
Author(s):  
Aloka Samantaray
Keyword(s):  
Side Effects ◽  
Spinal Anaesthesia ◽  
Postoperative Analgesia ◽  
Sedation Score ◽  
Controlled Study ◽  
Saline Control ◽  
Control Group ◽  
Hyperbaric Bupivacaine ◽  
Midazolam Group ◽  
Effective Analgesia

Background: Dexmedetomidine and midazolam both modulate spinal analgesia by different mechanisms, and yet, no human studies are available to compare them for postoperative analgesia after neuraxial administration. Objectives: We investigated the addition of dexmedetomidine or midazolam to intrathecal bupivacaine on the duration of effective analgesia and clinical safety profile. Study Design: Prospective, randomized, double blind, placebo controlled study. Setting: University teaching hospital. Methods: The study cohort included a consecutive and prospective series of patients, referred for endourological procedures. The patients were randomly allocated into 3 groups (20 patients each) to receive intrathecally 3 mL of 0.5% hyperbaric bupivacaine in combination with 5 mcg of dexmedetomidine (dexmedetomidine group), 1 mg of midazolam (midazolam group) or 0.5 mL of 0.9% saline (control group). The groups were compared to the regression time of sensory block, duration of effective analgesia (defined as the time interval between administration of intrathecal drug to the time of first analgesic request or a numeric rating scale ≥ 4.0), sedation score, and side effects in the first 24 hours. Statistics: One way-ANOVA, Kruskal Wallis test, and Chi-square test (χ2), significance level: P < 0.05. Results: The duration of effective analgesia (time to first analgesic request) was significantly prolonged in the dexmedetomidine group (286 ± 64 minutes, P < 0.01) when compared with midazolam group (236.9 ± 64.9 minutes) and the control group (212.7 ± 70.2 minutes). Pairwise comparisons among the 3 groups with Bonferroni adjustment revealed that patients from the dexmedetomidine group were more sedated in comparison to the midazolam and control groups at the end of the first 15 minutes after intrathecal injection [χ2 (2) = 7.157, P = 0.028], with a mean rank sedation score of 35.58 for dexmedetomidine, 25.00 for midazolam, and 30.93 for control. No significant differences in the side effects were observed during the study period. Midazolam did not lengthen the time of the two segment sensory regression or the time to first request analgesia. Limitation: The study cannot be extrapolated to muscle cutting surgeries under spinal anaesthesia. Conclusions: The addition of dexmedetomidine (5 mcg) to 3 mL of intrathecal hyperbaric bupivacaine (0.5%) significantly prolongs the duration of effective analgesia in comparison to 1 mg midazolam or placebo (0.9% normal saline) with a comparable incidences of side effects. Key words: Dexmedetomidine, midazolam, intrathecal, spinal anaesthesia, subarachnoid block, postoperative pain Pain Physician 20

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