scholarly journals Preoperative low-dose ketamine has no preemptive analgesic effect in opioid-naïve patients undergoing colon surgery when nitrous oxide is used - a randomized study

F1000Research ◽  
2014 ◽  
Vol 3 ◽  
pp. 226 ◽  
Author(s):  
Beatriz Nistal-Nuño ◽  
Enrique Freire-Vila ◽  
Francisco Castro-Seoane ◽  
Manuel Camba-Rodriguez
Keyword(s):  
Patient Satisfaction ◽  
Postoperative Pain ◽  
Analgesic Effect ◽  
Low Dose ◽  
Randomized Study ◽  
Colon Surgery ◽  
Morphine Consumption ◽  
Control Group ◽  
Hemodynamic Parameters ◽  
Rescue Analgesia

Background: The analgesic properties of ketamine are associated with its non-competitive antagonism of the N-methyl-D-aspartate receptor; these receptors exhibit an excitatory function on pain transmission and this binding seems to inhibit or reverse the central sensitization of pain. In the literature, the value of this anesthetic for preemptive analgesia in the control of postoperative pain is uncertain. The objective of this study was to ascertain whether preoperative low-dose ketamine reduces postoperative pain and morphine consumption in adults undergoing colon surgery.Methods: In a double-blind, randomized trial, 48 patients were studied. Patients in the ketamine group received 0.5 mg/kg intravenous ketamine before surgical incision, while the control group received normal saline. The postoperative analgesia was achieved with a continuous infusion of morphine at 0.015 mg∙kgˉ¹∙hˉ¹ with the possibility of 0.02 mg/kg bolus every 10 min. Pain was assessed using the Visual Analog Scale (VAS), morphine consumption, and hemodynamic parameters at 0, 1, 2, 4, 8, 12, 16, and 24 hours postoperatively. We quantified times to rescue analgesic (Paracetamol), adverse effects and patient satisfaction.Results: No significant differences were observed in VAS scores between groups (P>0.05), except at 4 hours postoperatively (P=0.040). There were no differences in cumulative consumption of morphine at any time point (P>0.05). We found no significant differences in incremental postoperative doses of morphine consumption in bolus, except at 12 h (P =0.013) and 24 h (P =0.002). The time to first required rescue analgesia was 70 ± 15.491 min in the ketamine group and 44 ± 19.494 min in the control (P>0.05). There were no differences in hemodynamic parameters or patient satisfaction (P>0.05).Conclusions: Preoperative low-dose-ketamine did not show a preemptive analgesic effect or efficacy as an adjuvant for decreasing opioid requirements for postoperative pain in patients receiving intravenous analgesia with morphine after colon surgery.

Effect of Perioperative Electroacupuncture as An Adjunctive Therapy on Postoperative Analgesia with Tramadol and Ketamine in Prostatectomy: A Randomised Sham-Controlled Single-Blind Trial

2014 ◽  
Vol 32 (3) ◽  
pp. 215-222 ◽  
Author(s):  
Vagia Ntritsou ◽  
Christos Mavrommatis ◽  
Christos Kostoglou ◽  
Georgios Dimitriadis ◽  
Nikolaos Tziris ◽  
...  
Keyword(s):  
Patient Satisfaction ◽  
Side Effects ◽  
Postoperative Pain ◽  
Adjunctive Therapy ◽  
Rating Scale ◽  
Numerical Rating Scale ◽  
Sham Acupuncture ◽  
Control Group ◽  
Rescue Analgesia ◽  
Pressure Algometer

Objectives To study the analgesic effect of electroacupuncture (EA) as perioperative adjunctive therapy added to a systemic analgesic strategy (including tramadol and ketamine) for postoperative pain, opioid-related side effects and patient satisfaction. Methods In a sham-controlled participant- and observer-blinded trial, 75 patients undergoing radical prostatectomy were randomly assigned to two groups: (1) EA (n=37; tramadol+ketamine+EA) and (2) control (n=38; tramadol+ketamine). EA (100 Hz frequency) was applied at LI4 bilaterally during the closure of the abdominal walls and EA (4 Hz) was applied at ST36 and LI4 bilaterally immediately after extubation. The control group had sham acupuncture without penetration or stimulation. The following outcomes were evaluated: postoperative pain using the Numerical Rating Scale (NRS) and McGill Scale (SF_MPQ), mechanical pain thresholds using algometer application close to the wound, cortisol measurements, rescue analgesia, Spielberger State Trait Anxiety Inventory (STAI Y-6 item), patient satisfaction and opioid side effects. Results Pain scores on the NRS and SF_MPQ were significantly lower and electronic pressure algometer measurements were significantly higher in the EA group than in the control group (p<0.001) at all assessments. In the EA group a significant decrease in rescue analgesia was observed at 45 min (p<0.001) and a significant decrease in cortisol levels was also observed (p<0.05). Patients expressed satisfaction with the analgesia, especially in the EA group (p<0.01). Significant delays in the start of bowel movements were observed in the control group at 45 min (p<0.001) and 2 h (p<0.05). Conclusions Adding EA perioperatively should be considered an option as part of a multimodal analgesic strategy.

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.

Intraoperative low-dose S-ketamine has no preventive effects on postoperative pain and morphine consumption after major urological surgery in children

2005 ◽  
Vol 15 (6) ◽  
pp. 484-490 ◽  
Author(s):  
KARIN BECKE ◽  
SVEN ALBRECHT ◽  
BERND SCHMITZ ◽  
DORIT RECH ◽  
WOLFGANG KOPPERT ◽  
...  
Keyword(s):  
Postoperative Pain ◽  
Low Dose ◽  
Morphine Consumption ◽  
Urological Surgery ◽  
Preventive Effects

scholarly journals Effect of Low-Dose (Single-Dose) Magnesium Sulfate on Postoperative Analgesia in Hysterectomy Patients Receiving Balanced General Anesthesia

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Arman Taheri ◽  
Katayoun Haryalchi ◽  
Mandana Mansour Ghanaie ◽  
Neda Habibi Arejan
Keyword(s):  
Single Dose ◽  
Postoperative Pain ◽  
General Anesthesia ◽  
Magnesium Sulfate ◽  
Pain Score ◽  
Normal Saline ◽  
Low Dose ◽  
Rating Scale ◽  
Controlled Trial ◽  
Control Group

Background and Aim. Aparallel, randomized, double blinded, placebo-controlled trial study was designed to assess the efficacy of single low dose of intravenous magnesium sulfate on post-total abdominal hysterectomy (TAH) pain relief under balanced general anesthesia.Subject and Methods. Forty women undergoing TAH surgery were assigned to two magnesium sulfate (N=20) and normal saline (N=20) groups randomly. The magnesium group received magnesium sulfate 50 mg·kg−1in 100 mL of normal saline solution i.v as single-dose, just 15 minutes before induction of anesthesia whereas patients in control group received 100 mL of 0.9% sodium chloride solution at the same time. The same balanced general anesthesia was induced for two groups. Pethidine consumption was recorded over 24 hours precisely as postoperative analgesic. Pain score was evaluated with Numeric Rating Scale (NRS) at 0, 6, 12, and 24 hours after the surgeries.Results. Postoperative pain score was lower in magnesium group at 6, 12, and 24 hours after the operations significantly (P<0.05).Pethidinerequirement was significantly lower in magnesium group throughout 24 hours after the surgeries (P=0.0001).Conclusion. Single dose of magnesium sulfate during balanced general anesthesia could be considered as effective and safe method to reduce postoperative pain and opioid consumption after TAH.

scholarly journals Effect of Sphenopalatine Ganglion Block With Bupivacaine on Postoperative Pain in Patients Undergoing Endoscopic Sinus Surgery

2019 ◽  
Vol 10 ◽  
pp. 215265671882128 ◽  
Author(s):  
Ahmad Rezaeian ◽  
Seyed Mostafa Hashemi ◽  
Zeinab Sadat Dokhanchi
Keyword(s):  
Postoperative Pain ◽  
Endoscopic Sinus Surgery ◽  
Intervention Group ◽  
Sinus Surgery ◽  
Control Group ◽  
Sphenopalatine Ganglion ◽  
Ganglion Block ◽  
Rescue Analgesia ◽  
Sphenopalatine Ganglion Block ◽  
And Control

Background Postoperative pain is one of the most complications in endoscopic sinus surgery. We aimed to evaluate the effect of the sphenopalatine ganglion block (SPGB) with bupivacaine on postoperative pain in patients undergoing endoscopic sinus surgery. Methods and Materials: In this clinical trial, 40 patients who indicated functional endoscopic sinus surgery were selected and then divided into 2 parallel groups as intervention and control. The intervention group was received 1.5 mL of bupivacaine 0.5% (injected to sphenopalatine ganglion) and while control was injected 1.5 mL of normal saline at the same injection site. Also, the visual analogue scale (VAS) was recorded immediately after anesthesia, along with 6, 12, 24, 48 h, 7 days, and 21 days after the operation for all patients. Results Immediately after anesthesia, as well as 6, 12, and 24 h after the operation, VAS in the intervention group was significantly lower than in the control group ( P < .05, for all). However, there were no significant differences between the 2 groups regarding VAS 48 h as well as 7 and 21 days after surgery ( P > .05, for both). Also, the rescue analgesia in the intervention group was significantly lower than in the control group ( P = .01). Conclusion SPGB with bupivacaine 0.5% (1.5 mL) was a simple, effective, safe, and noninvasive method for the management of postoperative pain in the patients undergoing endoscopic sinus surgery.

Evaluation of postoperative pain and toxicological aspects of the use of dipyrone and tramadol in cats

2019 ◽  
Vol 22 (6) ◽  
pp. 467-475 ◽  
Author(s):  
Luciana G Teixeira ◽  
Letícia R Martins ◽  
Paula I Schimites ◽  
Guilherme L Dornelles ◽  
Graciane Aiello ◽  
...  
Keyword(s):  
Postoperative Pain ◽  
Complete Blood Count ◽  
Venous Blood ◽  
Serum Biochemistry ◽  
Postoperative Treatment ◽  
Control Group ◽  
Rescue Analgesia ◽  
Biochemical Variables ◽  
Oxidative Markers ◽  
Hematological And Biochemical Parameters

Objectives The aim of this study was to evaluate the effects of dipyrone and tramadol, used for 5 days, on postoperative pain, hematological and biochemical parameters, and oxidative markers on erythrocytes. Methods Twenty-eight healthy cats underwent ovariohysterectomy and were randomly allocated to four groups (each n = 7), according to the postoperative treatment administered intravenously: control (saline 1 ml q8h), DIP1 (dipyrone 25 mg/kg q24h), DIP2 (dipyrone 25 mg/kg q12h) and DIP3 (dipyrone 25 mg/kg q8h). All animals received tramadol (2 mg/kg q8h). Pain was assessed by visual analog (VAS), multidimensional UNESP and Glasgow pain scales for cats preoperatively and at 3, 6, 12, 24, 36 and 48 h after extubation. Venous blood was collected daily for 5 days, and on day 10, to perform a complete blood count (CBC) and determine the percentage of Heinz bodies (HBs). Serum biochemistry was evaluated preoperatively and on days 5 and 10; superoxide dismutase (SOD), catalase (CAT), myeloperoxidase (MPO) and lipoperoxidation were evaluated preoperatively and on days 3, 5 and 10. Results Control cats had higher pain scores than DIP3 cats by UNESP ( P = 0.0065), and DIP2 ( P = 0.0035) and DIP3 cats ( P = 0.0108) by VAS 3 h postoperatively. Rescue analgesia was required by two animals in the control group and one each in the DIP1 and DIP2 groups. There was no difference in SOD or CAT among groups. On day 5, MPO was more active in DIP2 than in DIP3 cats ( P = 0.0274). No difference in lipoperoxidation among treatment and control cats was found. CBC remained constant and without statistical difference among groups. Control, DIP2 and DIP3 cats presented a similar percentage of HBs on day 10. Biochemical variables were similar among groups and times. Conclusions and relevance The administration of dipyrone in cats, when used in combination with tramadol, did not ensure better analgesia than tramadol alone. Dipyrone did not significantly affect biochemical variables and oxidative markers, despite minimal, clinically irrelevant, hematological differences between groups.

scholarly journals Role of Preoperative Pregabalin in Reducing Inhalational Anaesthetic Requirements in Abdominal Hysterectomy: Randomized Controlled Trial

2019 ◽  
Author(s):  
Ahmed Abdalla Mohamed ◽  
Gehan Helmy Ibrahim ◽  
Nesrine Abd Elrahman El Refai ◽  
Tamer Mousaad Abdelhamid Gamaleldin ◽  
Reham Ali Abdelrahman Abdelrahman ◽  
...  
Keyword(s):  
Postoperative Pain ◽  
General Anaesthesia ◽  
Bispectral Index ◽  
Total Abdominal Hysterectomy ◽  
Abdominal Hysterectomy ◽  
Neurological Dysfunction ◽  
Hypoglycemic Agents ◽  
Controlled Study ◽  
Control Group ◽  
Rescue Analgesia

Abstract Background: preoperative oral pregabalin controls postoperative pain & decreases anesthetic requirements in total intravenous anaesthesia . In this study, we hypothesized that preoperative pregabalin reduces inhaled isoflurane requirements. Methods: Study was conducted in a university hospital, included 50 women (18-60 yrs.), ASA I or II, admitted to undergo elective abdominal hysterectomy under general anaesthesia. Time of study: June to September 2017. Exclusion criteria were allergy or hypersensitivity to pregabalin; patients on calcium channel blockers, antiepileptic drugs, antidepression drugs, any analgesics or sedatives, or oral hypoglycemic agents; and patients with severe cardiovascular, renal, hepatic or neurological dysfunction. Interventions: giving either oral pregabalin 150 mg or placebo to patients of both groups. Primary outcome measures: inhaled isoflurane requirements to maintain haemodynamics ± 20% of baseline& bispectral index (BIS) of 40 - 60, measured using MAQUET Flow-I anaesthetic machine. Secondary outcomes : attenuation of pressor response to intubation, postoperative pain, first time for rescue analgesia, total anaglesics and adverse effects. Results: Isoflurane consumption was significantly less in pregabalin group (7.80 ± 1.27ml h -1) versus (12.27 ± 2.49 ml h-1) in control group, (P= 0.00). Better haemodynamic stability was in pregabalin group after intubation. First postoperative hour :the mean VAS score was significantly higher in control group (7.10 ± 1.20) compared to pregabalin group (4.50 ± 1.70), P<0.001. All patients in control group received pethidine intramuscular. More patients in pregabalin group suffered dizziness. Conclusion: preoperative pregabalin 150 mg ,1 h before total abdominal hysterectomy has an inhaled anaesthetic-sparing effect, maintain haemodynamics and optimizes postoperative analgesia. Keywords: Gabapentinoids, Pregabalin; Inhalation Anaesthetics, Isoflurane; Monitoring, Bispectral Index; Surgery, Abdominal Hysterectomy Objectives: We aimed to investigate the effectiveness and safety of preoperative oral pregabalin 150 mg in women undergoing elective total abdominal hysterectomy under general anaesthesia. Design: A prospective, randomized, double-blind, controlled study. Trial Registry Number: ClinicalTrials.gov: NCT 03302208

scholarly journals The Effect of Adding Low-Dose Naloxone to Intrathecal Morphine on Postoperative Pain and Morphine Related Side Effects after Cesarean Section: A Double-Blind, Randomized, Clinical Trial

2019 ◽  
Vol 7 (23) ◽  
pp. 3979-3983 ◽  
Author(s):  
Saloumeh Peivandi ◽  
Mohammad Reza Habibi ◽  
Afshin Gholipour Baradari ◽  
Abdolmajid Gholinataj ◽  
Ali Habibi ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Postoperative Pain ◽  
Pain Intensity ◽  
Spinal Anaesthesia ◽  
Postoperative Nausea ◽  
Low Dose ◽  
Intrathecal Morphine ◽  
Control Group ◽  
Study Group ◽  
Double Blind

BACKGROUND: Nowadays, spinal anaesthesia is a suitable choice for most elective and emergency cesarean section (C-section) deliveries. AIM: This study aimed to determine the effect of adding low-dose naloxone to intrathecal morphine on postoperative pain and morphine related side effects after C-section. MATERIAL AND METHODS: In the present double-blind, randomised clinical trial, 70 women aged over 18 years, who were candidates for elective medical C-section under spinal anaesthesia were selected and randomly assigned to either the study group or the control group. For spinal anaesthesia, 10 mg of Bupivacaine plus 100 μg of morphine was administered for all patients. However, patients in the study group received 20 µg of naloxone intrathecally; but the patients in the control group only received normal saline as a placebo. After surgery, patient-controlled analgesia (PCA) pump with paracetamol (Apotel®) was connected to each patient. The intensity of postoperative pain in the patients was evaluated and recorded using Visual Acuity Screening (VAS) at 2, 4, 6 and 24 hours after the surgery. The patients were also examined for postoperative nausea and pruritus. RESULTS: Regardless of the groups to which the patients were assigned, a significant difference in pain intensity was observed during the study period (time effect; p < 0.001). Although the intensity of pain was lower in the study group, the difference was not statistically significant (group effect; p = 0.84). Also, there was no group time interaction between pain intensity and the times studied (p = 0.61). The incidence rates of postoperative nausea and pruritus were significantly lower in the study group compared to the control group (p < 0.001). CONCLUSION: According to the results of this study, adding low dose naloxone to intrathecal morphine did not significantly change postoperative pain intensity in the patients undergone elective C-section using spinal anaesthesia; however, significantly decreased the severity of postoperative nausea and pruritus.

scholarly journals Effects of Bilateral Infraorbital and Infratrochlear Nerve Block on Emergence Agitation after Septorhinoplasty: A Randomized Controlled Trial

2019 ◽  
Vol 8 (6) ◽  
pp. 769
Author(s):  
Hoon Choi ◽  
Seung Ho Jung ◽  
Jin Myung Hong ◽  
Young Ho Joo ◽  
Youme Kim ◽  
...  
Keyword(s):  
Patient Satisfaction ◽  
Postoperative Pain ◽  
Adverse Events ◽  
Nerve Block ◽  
Controlled Trial ◽  
Isotonic Saline ◽  
Block Group ◽  
Hemodynamic Parameters ◽  
Emergence Agitation ◽  
Patient Satisfaction Score

Emergence agitation is common after septorhinoplasty, and postoperative pain is the main risk factor for this condition. Infraorbital and infratrochlear nerve block have been reported to facilitate pain management in patients after nasal procedures. The effect of peripheral nerve block on the incidence of emergence agitation has not been evaluated. Sixty-six patients that were scheduled for septorhinoplasty were assigned to receive bilateral infraorbital and infratrochlear nerve block with either 8 mL of 0.5% ropivacaine (Block group) or isotonic saline (Sham Block group). The incidence of emergence agitation was evaluated using the Riker sedation-agitation scale. Analgesic consumption, hemodynamic parameters, postoperative pain scores, adverse events, and patient satisfaction with analgesia were evaluated. The incidence of emergence agitation was lower in the Block group than in the Sham Block group (6 (20.0%) versus 20 (62.5%), p = 0.002). The mean intraoperative remifentanil consumption was lower in the Block group than in the Sham Block group (0.074 ± 0.014 μg/kg/min. versus 0.093 ± 0.019 μg/kg/min., respectively, p < 0.0001), as was the proportion of patients that needed postoperative tramadol administration and median postoperative pain score at 0–2 h after surgery (9 (30.0%) versus 21 (65.6%), p = 0.011; 3.0 (2.0–4.0) versus 4.0 (3.0–4.0), p < 0.0001, respectively). Hemodynamic parameters and the incidence of adverse events were similar between the two groups. The median patient satisfaction score with respect to analgesia was higher in the Block group than in the Sham Block group (3.5 (3.0–4.0) versus 3.0 (3.0–4.0), respectively, p = 0.034). The preoperative bilateral infraorbital and infratrochlear nerve block decreased the incidence of emergence agitation after septorhinoplasty.

Effect of Dexmedetomidine Added to Modified Pectoral Block on Postoperative Pain and Stress Response in Patient Undergoing Modified Radical Mastectomy

2018 ◽  
Vol 1 (21;1) ◽  
pp. E87-E96 ◽  
Author(s):  
Fatma A. El Sherif
Keyword(s):  
Blood Pressure ◽  
Stress Response ◽  
Side Effects ◽  
Postoperative Pain ◽  
Radical Mastectomy ◽  
Morphine Consumption ◽  
Surgical Trauma ◽  
Modified Radical Mastectomy ◽  
Rescue Analgesia ◽  
Vas Scores

Background: The most common surgical procedure for breast cancer is the modified radical mastectomy (MRM), but it is associated with significant postoperative pain. Regional anesthesia can reduce the stress response associated with surgical trauma. Objectives: Our aim is to explore the efficacy of 1 µg/kg dexmedetomedine added to an ultrasound (US)-modified pectoral (Pecs) block on postoperative pain and stress response in patients undergoing MRM. Study Design: A randomized, double-blind, prospective study. Setting: An academic medical center. Methods: Sixty patients with American Society of Anesthesiologists (ASA) physical status I– II (18–60 years old and weighing 50–90 kg) scheduled for MRM were enrolled and randomly assigned into 2 groups (30 in each) to receive a preoperative US Pecs block with 30 mL of 0.25% bupivacaine only (group 1, bupivacaine group [GB]) or 30 mL of 0.25% bupivacaine plus 1 µg/ kg dexmedetomidine (group II, dexmedetomidine group [GD]). The patients were followed-up 48 hours postoperatively for vital signs (heart rate [HR], noninvasive blood pressure [NIBP], respiratory rate [RR], and oxygen saturation [Sao2]), visual analog scale (VAS) scores, time to first request of rescue analgesia, total morphine consumption, and side effects. Serum levels of cortisol and prolactin were assessed at baseline and at 1 and 24 hours postoperatively. Results: A significant reduction in the intraoperative HR, systolic blood pressure (SBP), and diastolic blood pressure (DBP) starting at 30 minutes until 120 minutes in the GD group compared to the GB group (P < 0.05) was observed. The VAS scores showed a statistically significant reduction in the GD group compared to the GB group, which started immediately up until 12 hours postoperatively (P < 0.05). There was a delayed time to first request of analgesia in the GD group (25.4 ± 16.4 hrs) compared to the GB group (17 ± 12 hrs) (P = 0.029), and there was a significant decrease of the total amount of morphine consumption in the GD group (9 + 3.6 mg) compared to the GB group (12 + 3.6 mg) (P = 0.001). There was a significant reduction in the mean serum cortisol and prolactin levels at 1 and 24 hours postoperative in the GD patients compared to the GB patients (P < 0.05). Limitations: This study was limited by its sample size. Conclusion: The addition of 1 µg/kg dexmedetomidine to an US-modified Pecs block has superior analgesia and more attenuation to stress hormone levels without serious side effects, compared to a regular Pecs block in patients who underwent MRM. Key words: Postoperative pain, dexmedetomidine, Pecs block, stress response, breast surgery

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