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Fathy W, Hussein M, Elanwar R, Elmoutaz H, Abdelsadek DA, Kassim DY. Effect of intra-operative Magnesium sulphate on the occurrence of post-operative delirium and insomnia in patients undergoing lumbar fixation: a randomized controlled trial. BMC Anesthesiol 2024; 24:289. [PMID: 39138397 PMCID: PMC11320981 DOI: 10.1186/s12871-024-02579-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Accepted: 05/27/2024] [Indexed: 08/15/2024] Open
Abstract
BACKGROUND Over the last two decades, a large body of literature has focused on studying the prevalence and outcome of the postoperative delirium and sleep disturbance. The aim of this work was to evaluate the effect of intraoperative administration of Magnesium sulphate on the occurrence of post-operative delirium and insomnia in patients undergoing lumbar fixation. METHODS This prospective randomized controlled trial was carried out on 80 patients indicated for lumbar fixation; 40 of them received conventional general anesthesia with extra administration of intraoperative magnesium sulphate (Mg sulphate group), and the other 40 received conventional general anesthesia only (control group). Both groups were submitted to pre-operative assessment of depression using Beck Depression inventory (BDI) scale, pre-operative assessment of fatigue using a fatigue questionnaire, pre- and post-operative assessment of insomnia using Insomnia severity index (ISI), post-operative assessment of delirium using Memorial delirium assessment scale (MDAS), post-operative assessment of pain using Visual Analogue Scale (VAS), and pre- and post-operative Quantitative electroencephalography (QEEG). RESULTS Mg sulphate administration, age, pre-operative BDI, pre-operative ISI, and post-operative VAS were independent predictors of post-operative ISI (P-value < 0.001, 0.047, 0.021, < 0.001, and < 0.001 respectively). Age and post-operative VAS were independent predictors of post-operative MDAS (P-value = 0.008, 0.013 respectively). Mg sulphate administration and pre-operative ISI were independent predictors of post-operative VAS (P-value = 0.010, 0.006 respectively). CONCLUSION There was a significant relationship between intraoperative Mg sulphate administration and both post-operative insomnia and pain in unadjusted and adjusted analysis.
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Affiliation(s)
- Wael Fathy
- Department of Anesthesiology, Surgical ICU and Pain Management, Beni-Suef University, Salah Salem Street, Beni-Suef, 62511, Egypt.
| | - Mona Hussein
- Department of Neurology, Beni-Suef University, Beni-Suef, Egypt
| | - Rehab Elanwar
- Neuro Diagnostic Research Center, Beni-Suef University, Beni-Suef, Egypt
| | - Hatem Elmoutaz
- Department of Anesthesiology, Surgical ICU and Pain Management, Beni-Suef University, Salah Salem Street, Beni-Suef, 62511, Egypt
| | - Donya A Abdelsadek
- Department of Anesthesiology, Surgical ICU and Pain Management, Beni-Suef University, Salah Salem Street, Beni-Suef, 62511, Egypt
| | - Dina Y Kassim
- Department of Anesthesiology, Surgical ICU and Pain Management, Beni-Suef University, Salah Salem Street, Beni-Suef, 62511, Egypt
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Avci Y, Rajarathinam M, Kalsekar N, Tawfic Q, Krause S, Nguyen D, Liu E, Nagappa M, Subramani Y. Unravelling the analgesic effects of perioperative magnesium in general abdominal surgery: a systematic review and meta-analysis of randomized controlled trials. BRAZILIAN JOURNAL OF ANESTHESIOLOGY (ELSEVIER) 2024; 74:844524. [PMID: 38848810 PMCID: PMC11233871 DOI: 10.1016/j.bjane.2024.844524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 05/16/2024] [Accepted: 05/24/2024] [Indexed: 06/09/2024]
Abstract
BACKGROUND Prior research has established the effectiveness of magnesium in relieving postoperative pain. This article aims to evaluate magnesium sulfate for perioperative analgesia in adults undergoing general abdominal surgery under general anesthesia. OBJECTIVE The primary aim was to assess pain scores at 6 and 24 hours postoperatively in patients receiving magnesium sulfate vs. the control group. Secondary outcomes were postoperative opioid consumption, perioperative complications, and time to rescue analgesia. METHODS A comprehensive database search identified studies comparing magnesium sulfate with control in adults undergoing general anesthesia for general abdominal surgery. Using random-effects models, data were presented as mean ± Standard Deviation (SD) or Odds Ratios (OR) with corresponding 95% Confidence Intervals (95% CI). A two-sided p-value < 0.05 was considered statistically significant. RESULTS In total, 31 studies involving 1762 participants met the inclusion criteria. The magnesium group showed significantly lower postoperative pain scores at both early (within six hours) and late (up to 24 hours) time points compared to the control group. The early mean score was 3.1 ± 1.4 vs. 4.2 ± 2.3, and the late mean score was 2.3 ± 1.1 vs. 2.7 ± 1.5, resulting in an overall Mean Difference (MD) of -0.72; 95% CI -0.99, -0.44; p < 0.00001. The magnesium group was associated with lower rates of postoperative opioid consumption and shivering and had a longer time to first analgesia administration compared to the saline control group. CONCLUSION Magnesium sulfate administration was linked to reduced postoperative pain and opioid consumption following general abdominal surgery.
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Affiliation(s)
- Yasin Avci
- Western University, Schulich School of Medicine and Dentistry, London Health Sciences Centre and St Joseph Health Care, Department of Anesthesia and Perioperative Medicine, London, Ontario, Canada
| | - Manikandan Rajarathinam
- Western University, Schulich School of Medicine and Dentistry, London Health Sciences Centre and St Joseph Health Care, Department of Anesthesia and Perioperative Medicine, London, Ontario, Canada
| | - Neha Kalsekar
- Western University, Schulich School of Medicine and Dentistry, London Health Sciences Centre and St Joseph Health Care, Department of Anesthesia and Perioperative Medicine, London, Ontario, Canada
| | - Qutaiba Tawfic
- Western University, Schulich School of Medicine and Dentistry, London Health Sciences Centre and St Joseph Health Care, Department of Anesthesia and Perioperative Medicine, London, Ontario, Canada
| | - Sarah Krause
- Western University, Schulich School of Medicine and Dentistry, London Health Sciences Centre and St Joseph Health Care, Department of Anesthesia and Perioperative Medicine, London, Ontario, Canada
| | - Derek Nguyen
- Western University, Schulich School of Medicine and Dentistry, London Health Sciences Centre and St Joseph Health Care, Department of Anesthesia and Perioperative Medicine, London, Ontario, Canada
| | - Eric Liu
- Western University, Schulich School of Medicine and Dentistry, London Health Sciences Centre and St Joseph Health Care, Department of Anesthesia and Perioperative Medicine, London, Ontario, Canada
| | - Mahesh Nagappa
- Western University, Schulich School of Medicine and Dentistry, London Health Sciences Centre and St Joseph Health Care, Department of Anesthesia and Perioperative Medicine, London, Ontario, Canada
| | - Yamini Subramani
- Western University, Schulich School of Medicine and Dentistry, London Health Sciences Centre and St Joseph Health Care, Department of Anesthesia and Perioperative Medicine, London, Ontario, Canada.
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Wen ZH, Wu ZS, Huang SY, Chou TL, Cheng HJ, Lo YH, Jean YH, Sung CS. Local Magnesium Sulfate Administration Ameliorates Nociception, Peripheral Inflammation, and Spinal Sensitization in a Rat Model of Incisional Pain. Neuroscience 2024; 547:98-107. [PMID: 38657727 DOI: 10.1016/j.neuroscience.2024.03.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 03/25/2024] [Accepted: 03/28/2024] [Indexed: 04/26/2024]
Abstract
OBJECTIVE Postoperative pain remains one of the most common complaints after surgery, and appropriate treatments are limited. METHODS We therefore investigated the effect of the anti-nociceptive properties of magnesium sulfate (MgSO4), an N-methyl-D-aspartate (NMDA) receptor antagonist, on incision-induced postoperative pain and peripheral and central nervous system inflammation. RESULTS We found that local MgSO4 administration dose-dependently increases paw withdrawal latency, indicating reduced peripheral postoperative pain. Furthermore, MgSO4 inhibited the expression of interleukin-1β (IL-1β) and inducible nitric oxide synthase (iNOS) and phosphorylation of the NMDA receptor NR1 subunit in injured paw tissue and significantly attenuated microglial and astrocytic activation in the ipsilateral lumbar spinal cord dorsal horn. CONCLUSION Locally administered MgSO4 has potential for development as an adjunctive therapy for preventing central nociceptive sensitization.
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Affiliation(s)
- Zhi-Hong Wen
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804201, Taiwan; Institute of Biopharmaceutical Sciences, National Sun Yat-sen University, Kaohsiung 804201, Taiwan
| | - Zong-Sheng Wu
- Division of Pain Management, Department of Anesthesiology, Taipei Veterans General Hospital, Taipei 112201, Taiwan
| | - Shi-Ying Huang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Tung-Lin Chou
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804201, Taiwan
| | - Hao-Jung Cheng
- Institute of Biopharmaceutical Sciences, National Sun Yat-sen University, Kaohsiung 804201, Taiwan
| | - Yi-Hao Lo
- Department of Family Medicine, Zouying Armed Forces General Hospital, Kaohsiung 813204, Taiwan; Institute of Medical Science and Technology, National Sun Yat-Sen University, Kaohsiung 804201, Taiwan
| | - Yen-Hsuan Jean
- Department of Orthopedic Surgery, Pingtung Christian Hospital, No. 60 Dalian Road, Pingtung 900026, Taiwan
| | - Chun-Sung Sung
- Division of Pain Management, Department of Anesthesiology, Taipei Veterans General Hospital, Taipei 112201, Taiwan; School of Medicine, National Yang-Ming Chiao Tung University, Taipei 112304, Taiwan.
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Mishra S, Jain S, Purohit S, Lal G, Sharma N. Analgesic Effects of Magnesium Sulphate as an Adjuvant to Fentanyl for Monitored Anaesthesia Care During Hysteroscopy. Cureus 2023; 15:e43458. [PMID: 37711929 PMCID: PMC10498801 DOI: 10.7759/cureus.43458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/14/2023] [Indexed: 09/16/2023] Open
Abstract
BACKGROUND Magnesium sulphate (MgSO4) is conventionally used in the treatment of eclampsia, refractive arrhythmias, asthma, etc. In our study, we aimed to study the analgesic effects of MgSO4 as an adjuvant to fentanyl and reduce the intraoperative opioid requirement to decrease their adverse effects. METHODS A total of 122 patients scheduled for hysteroscopy were randomly divided into two groups. Patients in the magnesium group (group A) received intravenous MgSO4 50 mg/kg in 100 ml of isotonic saline over 15 minutes before anaesthesia induction and then 15 mg/kg per hour by continuous intravenous infusion. Patients in the control group (group B) received an equal volume of isotonic saline as a placebo. All the patients were induced with fentanyl and propofol. Perioperative haemodynamic monitoring and postoperative assessment of pain were done. RESULTS Only 18% of the patients in group A required rescue analgesics as compared to 39.3% of patients in group B. The patients receiving MgSO4 displayed lower verbal numeric rating scale scores in the postoperative period. In addition, the intraoperative requirement of fentanyl (101 (21.33) vs. 144 (28.4) µg, mean (SD)) and propofol (121 (13.3) vs. 140 (16.5) mg, mean (SD)) was significantly lower in group A as compared to that in group B. CONCLUSION MgSO4, when administered as an adjuvant to opioids, provided effective postoperative analgesia thereby reducing the need for rescue analgesics. It also decreases intraoperative fentanyl consumption and its dose-related side effects.
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Affiliation(s)
- Sonal Mishra
- Anesthesiology, Sawai Man Singh (SMS) Medical College, Jaipur, IND
| | - Siddharth Jain
- Orthopedics, All India Institute of Medical Sciences, Bhopal, IND
| | - Shobha Purohit
- Anesthesiology, Sawai Man Singh (SMS) Medical College, Jaipur, IND
| | - Girdhari Lal
- Anesthesiology, Sawai Man Singh (SMS) Medical College, Jaipur, IND
| | - Neelu Sharma
- Anesthesiology, Sawai Man Singh (SMS) Medical College, Jaipur, IND
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Puch Oernskov M, Gaspar Santos S, Sohail Asghar M, Wildgaard K. Is intravenous magnesium sulphate a suitable adjuvant in postoperative pain management? - A critical and systematic review of methodology in randomized controlled trials. Scand J Pain 2023; 23:251-267. [PMID: 36473053 DOI: 10.1515/sjpain-2022-0048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 11/10/2022] [Indexed: 12/13/2022]
Abstract
A growing worldwide focus on opioid-free anaesthesia entails multimodal analgesic strategies involving non-opioids such as magnesium sulphate (MgSO4). Several systematic reviews have concluded there is beneficial analgesic effect of MgSO4 administration but do not take considerable heterogeneity among the studies into consideration. Medical literature published until June 2021 was searched in PubMed/Medline, Embase, Central and Web of Science: The final search yielded a total of 5,672 articles. We included only randomised controlled trials assessing the effect of intravenous MgSO4 on opioid consumption and acute postoperative pain when compared to either placebo or standardized analgesic treatment. The primary aim was to compare the homogeneity of essential variables and confounders. A post-hoc meta-analysis demonstrated a reduction in both postoperative morphine consumption (-6.12 mg) and pain score (-12.32 VAS points) in favour of the MgSO4-groups. Data for meta-analysis was missing from 19 studies (45%) on morphine consumption and 29 studies (69%) for pain score, the majority of which reports no effect for either morphine consumption or pain score. The calculated heterogeneity among the included studies was considerable for both outcomes; I 2=91% for morphine consumption and I 2=96% for pain score. Although we found a per se reduction in opioid consumption and pain score, methodological heterogeneity and clinical shortcomings of pre-, intra-, and post anaesthetic data precludes conclusions on clinical importance of intraoperative intravenous MgSO4. In addition, the reduction is likely less than what can be gained from using standardized analgesic treatment.
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Affiliation(s)
- Mark Puch Oernskov
- Department of Anaesthesia, Pain and Respiratory Support, Copenhagen University Hospital Rigshospitalet, Glostrup, Denmark
| | | | | | - Kim Wildgaard
- Department of Anaesthesiology and Herlev Anaesthesia Critical and Emergency Care Science Unit, Copenhagen University Hospital Herlev-Gentofte, Herlev, Denmark
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Yazdi AP, Esmaeeli M, Gilani MT. Effect of intravenous magnesium on postoperative pain control for major abdominal surgery: a randomized double-blinded study. Anesth Pain Med (Seoul) 2022; 17:280-285. [PMID: 35918860 PMCID: PMC9346203 DOI: 10.17085/apm.22156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 06/10/2022] [Indexed: 11/17/2022] Open
Abstract
Background This study aimed to evaluate the postoperative analgesic effect of magnesium sulfate during abdominal surgery. Methods This randomized double-blinded study involved 84 patients candidates for abdominal surgery into two same groups. In the magnesium group, at first 25 mg/kg/1 h magnesium sulfate; and then, 100 mg/kg/24 h was infused in the intensive care unit. The pain intensity (the primary outcome), was assessed using the numeric rating scale (NRS) every 3 h. If the NRS was > 3, morphine (as a secondary outcome) was used and evaluated. The results were analyzed using SPSS ver. 19 software, and statistical significance was set at P < 0.05 Results Demographic parameters were similar between the groups. The pain intensity were similar at first and then at the third hour in both groups (P = 0.393 and P = 0.172, respectively), but thereafter between 6 and 24 h, the pain severity was significantly lower in the magnesium group (4.4 ± 1.3 in the control and 3.34 ± 1 in the magnesium group at 6th hour and P = 0.001). In addition, morphine intake in the first 24 h in the two groups had a significant difference, with 13.2 ± 5.7 mg in control group and 8 ± 3.5 mg in magnesium group (P = 0.001). Conclusions In this study, intravenous magnesium sulfate after abdominal surgeries for 24 h resolved the pain intensity after six hours and reduced morphine dosage.
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Affiliation(s)
- Arash Peivandi Yazdi
- Department of Anesthesiology, Lung Diseases Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mehrdad Esmaeeli
- Department of Anesthesiology, Lung Diseases Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mehryar Taghavi Gilani
- Department of Anesthesiology, Lung Diseases Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- Corresponding author: Mehryar Taghavi Gilani, M.D. Department of Anesthesiology, Lung Diseases Research Center, Mashhad University of Medical Sciences, Emam Reza Hospital, Sina Ave., Mashhad 9137913316, Iran Tel: 98-5138583878, Fax: 98-5138436199 E-mail:
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Hashemian M, Mirkheshti A, Mirafzal A, Ahmadipour H, Nasehabad MA. The effect of preoperative oral magnesium oxide on the severity of postoperative pain among women undergoing hysterectomy. Ir J Med Sci 2022; 191:2711-2716. [PMID: 35022952 DOI: 10.1007/s11845-021-02905-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 12/22/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Magnesium sulfate has been reported to be effective in perioperative pain treatment and in blunting somatic, autonomic, and endocrine reflexes provoked by noxious stimuli. The pre-emptive analgesic effects of magnesium in reducing postoperative pain could be beneficial in abdominal and gynecologic surgeries. OBJECTIVE The aim of study was to compare the pre-emptive analgesic effects of oral magnesium oxide and naproxen for hysterectomy surgery. METHODS This study evaluated all patients who were candidates for hysterectomy in 2 months. The 64 patients were randomly divided into two groups using a random allocation sequence. The patients in the intervention and control groups received either magnesium oxide tablet (500 mg) or naproxen tablet (500 mg) orally half an hour before surgery, respectively. The severity of postoperative pain is assumed as a primary outcome which is evaluated using the visual analogue scale (VAS). RESULTS In this study, 64 patients were assessed. The results showed age, weight, systolic and diastolic blood pressure, and pulse rate of the patients in the two groups were not significantly different (p > 0.05). The mean score of pain intensity for these patients was significantly lower than the patients receiving naproxen (p-value: 0.03). Besides, more than one-quarter of patients in the magnesium oxide group (n = 9, 28.12%) received this analgesia with lower dose than the patients in the naproxen group (p-value: 0.03). CONCLUSION The results of this study showed that preoperative oral magnesium oxide had a significant effect on the severity of postoperative pain and consumption of postoperative analgesia.
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Affiliation(s)
- Morteza Hashemian
- Department of Anesthesiology and Pain Medicine, Kerman University of Medical Sciences, Kerman, Iran.
| | - Alireza Mirkheshti
- Department of Anesthesiology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Amirhossein Mirafzal
- Department of Emergency Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Habibeh Ahmadipour
- Institute for Future Studies in Health, Kerman University of Medical Sciences, Kerman, Iran
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The effect of intravenous magnesium on postoperative morphine consumption in noncardiac surgery: A systematic review and meta-analysis with trial sequential analysis. Eur J Anaesthesiol 2021; 37:212-223. [PMID: 31977626 DOI: 10.1097/eja.0000000000001164] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Several studies suggest that systemic magnesium reduces postoperative opioid consumption and the intensity of pain, but others report conflicting results. The efficacy and safety profile of intravenous magnesium in noncardiac surgery remain uncertain. OBJECTIVES The aim of this review was to investigate the effect of intravenous magnesium on the consumption of postoperative morphine in the first 24 h in adults undergoing noncardiac surgery. DESIGN Systematic review and meta-analysis with trial sequential analysis. DATA SOURCES MEDLINE, EMBASE, CENTRAL from their inception until January 2019. ELIGIBILITY CRITERIA All randomised clinical trials comparing intravenous magnesium versus placebo in noncardiac surgery were systematically searched in the databases. Observational studies, case reports, case series and nonsystematic reviews were excluded. RESULTS Fifty-one trials (n=3311) were included for quantitative meta-analysis. In comparison with placebo, postoperative morphine consumption at 24-h was significantly reduced in the magnesium group, with a mean difference [95% confidence interval (CI)] of -5.6 mg (-7.54 to -3.66, P < 0.001, I = 92%, level of evidence low). The trial sequential analysis for the effect of magnesium on postoperative morphine consumption was conclusive. Patients who received magnesium had a longer time to the first analgesia request [143 (103 to 183) min, P < 0.001, I = 99%, level of evidence low] and a lower incidence of shivering [0.26 (0.15 to 0.44), P < 0.001, I = 35%, level of evidence very low]. However, no significance differences were demonstrated in postoperative pain scores in the first 24 h (mean difference, 95% CI) -0.30 (-0.69 to 0.09, P = 0.13, I = 91%, level of evidence low), bradycardia (odds ratio, 95% CI) 1.13 (0.43 to 2.98, P = 0.80, I = 35%, level of evidence very low) and postoperative nausea and vomiting (odds ratio, 95% CI) 0.90 (0.67 to 1.22, P = 0.49, I = 25%, level of evidence moderate). CONCLUSION The current meta-analysis demonstrates that the use of intravenous magnesium as part of multimodal analgesia may reduce morphine consumption in the first 24 h after surgery and delay the time to the first request for analgesia in patients undergoing noncardiac surgery. However, the included studies were of low-quality with substantial heterogeneity. TRIAL REGISTRATION CRD42018086846.
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Magnesium for Pain Treatment in 2021? State of the Art. Nutrients 2021; 13:nu13051397. [PMID: 33919346 PMCID: PMC8143286 DOI: 10.3390/nu13051397] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/15/2021] [Accepted: 04/19/2021] [Indexed: 12/11/2022] Open
Abstract
Background: Magnesium (Mg) is commonly used in clinical practice for acute and chronic pain and has been reported to reduce pain intensity and analgesics consumption in a number of studies. Results are, however, contested. Objectives: This review aims to investigate randomised clinical trials (RCTs) on the effectiveness of Mg treatment on pain and analgesics consumption in situations including post-operative pain, migraine, renal pain, chronic pain, neuropathic pain and fibromyalgia. Results: The literature search identified 81 RCTs (n = 5447 patients) on Mg treatment in pain (50 RCTs in post-operative pain, 18 RCTs in migraine, 5 RCTs in renal pain, 6 RCTs in chronic/neuropathic pain, 2 RCTs in fibromyalgia). Conclusion: The level of evidence for the efficacy of Mg in reducing pain and analgesics consumption is globally modest and studies are not very numerous in chronic pain. A number of gaps have been identified in the literature that need to be addressed especially in methodology, rheumatic disease, and cancer. Additional clinical trials are needed to achieve a sufficient level of evidence and to better optimize the use of Mg for pain and pain comorbidities in order to improve the quality of life of patients who are in pain.
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Reducing the dose of neuromuscular blocking agents with adjuncts: a systematic review and meta-analysis. Br J Anaesth 2020; 126:608-621. [PMID: 33218672 DOI: 10.1016/j.bja.2020.09.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 09/14/2020] [Accepted: 09/14/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Acute global shortages of neuromuscular blocking agents (NMBA) threaten to impact adversely on perioperative and critical care. The use of pharmacological adjuncts may reduce NMBA dose. However, the magnitude of any putative effects remains unclear. METHODS We conducted a systematic review and meta-analysis of RCTs. We searched Medline, Embase, Web of Science, and Cochrane Database (1970-2020) for RCTs comparing use of pharmacological adjuncts for NMBAs. We excluded RCTs not reporting perioperative NMBA dose. The primary outcome was total NMBA dose used to achieve a clinically acceptable depth of neuromuscular block. We assessed the quality of evidence using the GRADE (Grades of Recommendation, Assessment, Development, and Evaluation) criteria. Data are presented as the standardised mean difference (SMD); I2 indicates percentage of variance attributable to heterogeneity. RESULTS From 3082 records, the full texts of 159 trials were retrieved. Thirty-one perioperative RCTs met the inclusion criteria for meta-analysis (n=1962). No studies were conducted in critically ill patients. Reduction in NMBA dose was associated with use of magnesium (SMD: -1.10 [-1.44 to -0.76], P<0.001; I2=85%; GRADE=moderate), dexmedetomidine (SMD: -0.89 [-1.55 to -0.22]; P=0.009; I2=87%; GRADE=low), and clonidine (SMD: -0.67 [-1.13 to -0.22]; P=0.004; I2=0%; GRADE=low) but not lidocaine (SMD: -0.46 [-1.01 to -0.09]; P=0.10; I2=68%; GRADE=moderate). Meta-analyses for nicardipine, diltiazem, and dexamethasone were not possible owing to the low numbers of studies. We estimated that 30-50 mg kg-1 magnesium preoperatively (8-15 mg kg h-1 intraoperatively) reduces rocuronium dose by 25.5% (inter-quartile range, 14.7-31). CONCLUSIONS Magnesium, dexmedetomidine, and clonidine may confer a clinically relevant sparing effect on the required dose of neuromuscular block ing drugs in the perioperative setting. SYSTEMATIC REVIEW REGISTRATION PROSPERO: CRD42020183969.
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Varas V, Bertinelli P, Carrasco P, Souper N, Álvarez P, Danilla S, Egaña JI, Penna A, Sepúlveda S, Arancibia V, Álvarez MG, Vergara R. Intraoperative Ketamine and Magnesium Therapy to Control Postoperative Pain After Abdominoplasty and/or Liposuction: A Clinical Randomized Trial. J Pain Res 2020; 13:2937-2946. [PMID: 33235492 PMCID: PMC7678693 DOI: 10.2147/jpr.s276710] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 11/02/2020] [Indexed: 11/23/2022] Open
Abstract
Purpose This study aimed to compare the effects of ketamine and ketamine associated with magnesium on opioid consumption and pain scores in patients undergoing abdominoplasty and/or liposuction compared to standard treatment. Patients and Methods A total of 63 patients were included and randomized as follows: 21 patients in the Control group, 20 patients in the Ketamine group (Ket), and 22 patients in the Ketamine-magnesium group (KetMag). The KetMag group received an IV bolus of 0.3 mg/kg of ketamine and 50 mg/kg magnesium, followed by continuous infusion of ketamine (0.15 mg/kg/h) and magnesium (10 mg/kg/h) until extubation. The Ket group received the same bolus and infusion of ketamine, together with a bolus and continuous infusion of placebo instead of magnesium. The Control group received saline instead of ketamine and magnesium. The groups were compared in morphine consumption during the first 12h, body-postoperative pain and disability scale until the 90th day, the time until the first morphine request on the PCA pump, pain scores, and the adverse effects related to the use of study drugs. Results The KetMag group had a lower morphine consumption by almost 50% during the first 12h than the Control and the Ket groups. In addition, the KetMag group required the first dose of morphine later than the other two groups. There were no differences in the adverse effects of the proposed treatments. Finally, multiple linear regression and a nonlinear approach analysis indicated that the Control group experienced a higher degree of pain and increased morphine consumption per hour than Ket and KetMag groups. Conclusion Co-administration of intraoperative ketamine plus magnesium and ketamine alone are an effective and easy regime for reducing pain and opioid consumption in the postoperative period.
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Affiliation(s)
- Verónica Varas
- Department of Anesthesia and Perioperative Medicine, Hospital Clínico de la Universidad de Chile, Santiago, Chile
| | - Paz Bertinelli
- Department of Anesthesia and Perioperative Medicine, Hospital Clínico de la Universidad de Chile, Santiago, Chile
| | - Pablo Carrasco
- Department of Anesthesia and Perioperative Medicine, Hospital Clínico de la Universidad de Chile, Santiago, Chile
| | - Nicole Souper
- Department of Anesthesia and Perioperative Medicine, Hospital Clínico de la Universidad de Chile, Santiago, Chile
| | - Patricio Álvarez
- Department of Anesthesia and Perioperative Medicine, Hospital Clínico de la Universidad de Chile, Santiago, Chile
| | - Stefan Danilla
- Department of Surgery, Hospital Clínico de la Universidad de Chile, Santiago, Chile
| | - José Ignacio Egaña
- Department of Anesthesia and Perioperative Medicine, Hospital Clínico de la Universidad de Chile, Santiago, Chile.,Biomedical Neuroscience Institute (BNI), Universidad de Chile, Santiago, Chile
| | - Antonello Penna
- Department of Anesthesia and Perioperative Medicine, Hospital Clínico de la Universidad de Chile, Santiago, Chile.,Centro de Investigación Clínica Avanzada (CICA), Hospital Clínico de la Universidad de Chile, Santiago, Chile
| | - Sergio Sepúlveda
- Department of Surgery, Hospital Clínico de la Universidad de Chile, Santiago, Chile
| | - Virginia Arancibia
- Department of Anesthesia and Perioperative Medicine, Hospital Clínico de la Universidad de Chile, Santiago, Chile
| | - María Gabriela Álvarez
- Department of Anesthesia and Perioperative Medicine, Hospital Clínico de la Universidad de Chile, Santiago, Chile
| | - Rodrigo Vergara
- Departamento de Kinesiología, Facultad de Artes y Educación Física, Universidad Metropolitana de Ciencias de la Educación, Santiago, Chile
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Hassan WF, Tawfik MH, Nabil TM, Abd Elkareem RM. Could intraoperative magnesium sulphate protect against postoperative cognitive dysfunction? Minerva Anestesiol 2020; 86. [DOI: 10.23736/s0375-9393.20.14012-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Ataei M, Mashak B, Pouryaghobi SM, Rezaee M, Rad SS, Borzabadi A. Evaluation of the Effects of Magnesium Sulfate on Prevention of Post-dural-Puncture Headache in Elective Cesarean in Kamali Hospital. ELECTRONIC JOURNAL OF GENERAL MEDICINE 2020. [DOI: 10.29333/ejgm/7847] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Abo-Zeid MA, Ghareeb S, Abdelhalim MM. Different Analgesic Routes of Magnesium Sulfate: Intravenous versus Pectoralis II Interfascial Plane Block for Breast Cosmetic Surgeries. Anesth Essays Res 2019; 13:411-416. [PMID: 31602054 PMCID: PMC6775850 DOI: 10.4103/aer.aer_114_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Purpose The purpose of the study is to evaluate the most effective analgesic route of magnesium sulfate (MgSO4) either intravenous (i.v.) or pectoralis interfascial plane block. Patients and Methods Fifty adult female patients were divided into two equal groups: i.v. MgSO4 and Pecs II block MgSO4 (Pecs MgSO4) group. After general anesthesia, in i.v. MgSO4 group, the local anesthetic (LA) for Pecs II block was prepared by adding 3 mL saline to 57 mL bupivacaine 0.25% divided equally for each side. A bolus i.v. solution of MgSO4 10% 0.5 mL.kg-1 diluted in saline in a total volume of 100 mL was given over 15 minutes. Then, the solution for continuous i.v. infusion; 30 mL MgSO4 10% and 70 mL saline was infused at the rate of 0.5 mL.kg-1.h-1 intraoperatively. For PecsMgSO4 group, LA formed of 3 mL MgSO4 10% added to 57 mL bupivacaine 0.25%. Whereas, 100 mL saline was given as bolus i.v. followed by continuous infusion of 100 mL normal saline at the rate of 0.5 mL.kg-1.h-1. Results In the group received MgSO4-bupivacaine Pecs II block, there was a nonsignificant decrease in postoperative morphine consumption compared to i.v. administration of MgSO4. The two groups were comparable in the intensity of pain and sedation scores. Conclusion The use of bupivacaine Pecs II block enhanced with addition of MgSO4 to pectoralis interfascial plane block or intravenously in patients underwent breast cosmetic surgeries under general anesthesia was associated with comparable results of the postoperative morphine requirements, intensity of postoperative pain, and extension of the duration of postoperative analgesia. The intraoperative hemodynamic effects i.v. MgSO4 were superior to the pectoralis interfascial plane route of administration.
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Affiliation(s)
- Maha A Abo-Zeid
- Department of Anesthesia and Surgical Intensive Care, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Sameh Ghareeb
- Department of Anesthesia and Surgical Intensive Care, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - M M Abdelhalim
- Department of Plastic and Reconstructive Surgery, Faculty of Medicine, Mansoura University, Mansoura, Egypt
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Kawakami H, Nakajima D, Mihara T, Sato H, Goto T. Effectiveness of Magnesium in Preventing Shivering in Surgical Patients: A Systematic Review and Meta-analysis. Anesth Analg 2019; 129:689-700. [PMID: 31425208 DOI: 10.1213/ane.0000000000004024] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Clinical trials regarding the antishivering effect of perioperative magnesium have produced inconsistent results. We conducted a systematic review and meta-analysis with Trial Sequential Analysis to evaluate the effect of perioperative magnesium on prevention of shivering. METHODS We searched PubMed, EMBASE, Web of Science, Cochrane Central Register of Controlled Trials, and 2 registry sites for randomized clinical trials that compared the administration of magnesium to a placebo or no treatment in patients undergoing surgeries. The primary outcome of this meta-analysis was the incidence of shivering. The incidence of shivering was combined as a risk ratio with 95% CI using a random-effect model. The effect of the route of administration was evaluated in a subgroup analysis, and Trial Sequential Analysis with a risk of type 1 error of 5% and power of 90% was performed. The quality of each included trial was evaluated, and the quality of evidence was assessed using the Grading of Recommendation Assessment, Development, and Evaluation approach. We also assessed adverse events. RESULTS Sixty-four trials and 4303 patients (2300 and 2003 patients in magnesium and control groups, respectively) were included. The overall incidence of shivering was 9.9% in the magnesium group and 23.0% in the control group (risk ratio, 0.42; 95% CI, 0.33-0.52). Subgroup analysis revealed that the incidence of shivering was lower with IV (risk ratio, 0.29; 95% CI, 0.29-0.54; Grading of Recommendation Assessment, Development, and Evaluation, moderate), epidural (risk ratio, 0.24; 95% CI, 0.13-0.43; Grading of Recommendation Assessment, Development, and Evaluation, low), and intrathecal administration (risk ratio, 0.64; 95% CI, 0.43-0.96; Grading of Recommendation Assessment, Development, and Evaluation, moderate). Only trials with low risk of bias were included for Trial Sequential Analysis. The Z-cumulative curve for IV magnesium crossed the Trial Sequential Analysis monitoring boundary for benefit even though only 34.9% of the target sample size had been reached. The Z-cumulative curve for epidural or intrathecal administration did not cross the Trial Sequential Analysis monitoring boundary for benefit. No increase in adverse events was reported. CONCLUSIONS Perioperative IV administration of magnesium effectively reduced shivering and Trial Sequential Analysis suggested that no more trials are required to confirm that IV magnesium effectively reduces shivering.
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Affiliation(s)
| | - Daisuke Nakajima
- Intensive Care Department, Yokohama City University Medical Center, Yokohama, Japan
| | - Takahiro Mihara
- Education and Training Department, Yokohama City University Hospital, YCU Center for Novel and Exploratory Clinical Trials, Yokohama, Japan
- Department of Anesthesiology, Yokohama City University, School of Medicine, Yokohama, Japan
| | | | - Takahisa Goto
- Department of Anesthesiology, Yokohama City University, School of Medicine, Yokohama, Japan
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Helmy N, Badawy AA, Hussein M, Reda H. Comparison of the preemptive analgesia of low dose ketamine versus magnesium sulfate on parturient undergoing cesarean section under general anesthesia. EGYPTIAN JOURNAL OF ANAESTHESIA 2019. [DOI: 10.1016/j.egja.2014.12.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Affiliation(s)
- Nadia Helmy
- Anesthesia Department, Faculty of Medicine , Cairo University , Egypt
| | - Ahmed A. Badawy
- Anesthesia Department, Faculty of Medicine , Cairo University , Egypt
| | - Mohamed Hussein
- Anesthesia Department, Faculty of Medicine , Cairo University , Egypt
| | - Hany Reda
- Anesthesia Department, Faculty of Medicine , Cairo University , Egypt
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Samir EM, Badawy SS, Hassan AR. Intrathecal vs intravenous magnesium as an adjuvant to bupivacaine spinal anesthesia for total hip arthroplasty. EGYPTIAN JOURNAL OF ANAESTHESIA 2019. [DOI: 10.1016/j.egja.2013.06.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Affiliation(s)
- Enas M. Samir
- Kasr Al Aini Hospital, Department of Anesthesia and Intensive Care, Faculty of Medicine, Cairo University, Egypt
| | - Sahar S. Badawy
- Kasr Al Aini Hospital, Department of Anesthesia and Intensive Care, Faculty of Medicine, Cairo University, Egypt
| | - Amira Refaie Hassan
- Kasr Al Aini Hospital, Department of Anesthesia and Intensive Care, Faculty of Medicine, Cairo University, Egypt
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Kayalha H, Yaghoubi S, Yazdi Z, Izadpanahi P. Effect of Intervenous Magnesium Sulfate on Decreasing Opioid Requirement after Surgery of the Lower Limb Fracture by Spinal Anesthesia. Int J Prev Med 2019; 10:57. [PMID: 31143431 PMCID: PMC6528420 DOI: 10.4103/ijpvm.ijpvm_320_17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 10/30/2017] [Indexed: 11/09/2022] Open
Abstract
Background: Magnesium is the calcium natural physiological antagonist; it also antagonizes N-Methyl-D-aspartate receptors, therefore, providing antinociceptive properties. The reason for effective role of treatment with magnesium on decreasing opioid usage, less dissatisfaction, and good sleep quality is proposed theoretically yet. This study aimed to evaluate the effect of magnesium sulfate on decreasing opioids requirement after surgery of the lower limbs fracture by spinal anesthesia. Methods: A total of 60 patients aged from 45 to 75 years with the lower limb fractures (femur and hip) candidate for surgery by spinal anesthesia. In a randomized double-blind method, patients were divided into two groups as Magnesium Group (M) and Control Group (C). Group M received a bolus of 5 mg/kg magnesium sulfate plus (250 CC) normal saline and Group C received (250 CC) normal saline in the same condition. Results: Pain score and the physical dissatisfaction were reduced at 12, 24, and 48 h after surgery in Group M as compared with Group C (P = 0.000). Total opioid requirement at the end of 48 h and at the first 24 h after surgery were reduced in Group M as compared with Group C (P = 0.001). The endurance of spinal block was increased in Group M as compared with Group C (P = 0.000). Conclusions: A low dose of magnesium sulfate reduced the pain score, opioid requirement, and physical dissatisfaction while increased endurance of spinal block.
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Affiliation(s)
- Hamid Kayalha
- Department of Anesthesiology, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Siamak Yaghoubi
- Department of Anesthesiology, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Zohreh Yazdi
- Metabolic Disease Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Parastoo Izadpanahi
- Department of Anesthesiology, Qazvin University of Medical Sciences, Qazvin, Iran
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Sheldon SA, Aleman M, Costa LRR, Santoyo AC, Howey Q, Madigan JE. Intravenous infusion of magnesium sulfate and its effect on horses with trigeminal-mediated headshaking. J Vet Intern Med 2019; 33:923-932. [PMID: 30666732 PMCID: PMC6430935 DOI: 10.1111/jvim.15410] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 12/12/2018] [Indexed: 12/24/2022] Open
Abstract
Background Trigeminal‐mediated headshaking results from low‐threshold firing of the trigeminal nerve resulting in apparent facial pain. Magnesium may have neuroprotective effects on nerve firing that potentially dampen signs of neuropathic pain. This hypothesis has not been investigated in horses with trigeminal‐mediated headshaking. Objective To investigate head‐shaking behavior in affected horses after IV magnesium sulfate infusion. Animals Six geldings with trigeminal‐mediated headshaking. Methods Prospective randomized crossover study. Horses were controlled for diet and infused IV with 5% dextrose solution (DS; control solution at 2 mL/kg body weight [BW]) and MgSO4 50% solution (MSS at 40 mg/kg BW). Head‐shaking behavior was recorded at times T0 (baseline, before infusion) and T15, T30, T60, and T120 minutes post‐infusion. Venous blood variables such as pH, HCO3−, standard base excess (SBE), Na+, Cl−, K+, Ca2+, Mg2+, total magnesium (tMg), glucose, and lactate were measured; strong ion difference (SID) and anion gap (AG) were calculated for each time point. Results Blood variables including pH, Na+, Cl−, K+, SID, AG, lactate, Ca2+, tMg, and Mg2+ had significant changes with MSS as compared to DS treatment. Glucose, SBE, and HCO3− did not have significant changes. A 29% reduction in head‐shaking rate occurred after MSS treatment but no change occurred after DS treatment. Conclusions and Clinical Importance Administration of MSS IV increased plasma total and ionized magnesium concentrations and significantly decreased head‐shaking behavior in horses with trigeminal‐mediated headshaking.
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Affiliation(s)
- Shara A Sheldon
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, California
| | - Monica Aleman
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, California
| | - Lais Rosa R Costa
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, California
| | - Ana C Santoyo
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, California
| | - Quinn Howey
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, California
| | - John E Madigan
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, California
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Bamgbade OA. Intraoperative magnesium supplementation improves gynecology major surgery perioperative outcome. J Clin Anesth 2019; 44:21. [PMID: 29100019 DOI: 10.1016/j.jclinane.2017.10.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 10/20/2017] [Indexed: 12/01/2022]
Affiliation(s)
- Olumuyiwa A Bamgbade
- Department of Anaesthesia, University of British Columbia, Delta Hospital, Vancouver, V4K 3V6, BC, Canada.
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Morel V, Joly D, Villatte C, Pereira B, Pickering G. Preventive effect of oral magnesium in postmastectomy pain: protocol for a randomised, double-blind, controlled clinical trial. BMJ Open 2018; 8:e017986. [PMID: 30287600 PMCID: PMC6173239 DOI: 10.1136/bmjopen-2017-017986] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
INTRODUCTION Breast cancer affects 1 in 10 women worldwide, and mastectomy is a cause of chronic pain with neuropathic characteristics. N-methyl-D-aspartate receptor (NMDAR) antagonists such as ketamine, memantine, dextromethorphan or magnesium are used to treat refractory pain by blocking NMDAR. Oral memantine has been shown to prevent postmastectomy pain and cognitive impact and to maintain quality of life. Likewise, the present study is intended to assess the preventive effect of oral magnesium, administered ahead of mastectomy, on the development of neuropathic pain. As a physiological blocker of NMDAR, magnesium could be an interesting candidate to prevent postoperative pain and associated comorbidities, including cognitive and emotional disorders, multiple analgesic consumption and impaired quality of life. METHODS AND ANALYSIS A randomised double-blind controlled clinical trial (NCT03063931) will include 100 women with breast cancer undergoing mastectomy at the Oncology Hospital, Clermont-Ferrand, France. Magnesium (100 mg/day; n=50) or placebo (n=50) will be administered for 6 weeks, starting 2 weeks before surgery. Intensity of pain, cognitive and emotional function and quality of life will be assessed by questionnaires. The primary endpoint is pain intensity on a 0-10 numerical rating scale at 1 month postmastectomy. Data analysis will use mixed models; all tests will be two-tailed, with type-I error set at α=0.05. ETHICS AND DISSEMINATION The study protocol and informed consent form were approved in December 2016 by the French Research Ethics Committee (South East VI Committee). Results will be communicated in various congresses and published in international publications. TRIAL REGISTRATION NUMBER NCT03063931.
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Affiliation(s)
- Véronique Morel
- CHU Clermont-Ferrand, Inserm CIC Inserm 1405, Centre de Pharmacologie Clinique, Clermont-Ferrand, France
| | - Dominique Joly
- CHU Clermont-Ferrand, Centre Jean Perrin, Centre de Lutte contre le Cancer, Clermont-Ferrand, Auvergne, France
| | - Christine Villatte
- CHU Clermont-Ferrand, Centre Jean Perrin, Centre de Lutte contre le Cancer, Clermont-Ferrand, Auvergne, France
| | - Bruno Pereira
- CHU de Clermont-Ferrand, Délégation Recherche Clinique & Innovation - Villa annexe IFSI, Clermont-Ferrand, France
| | - Gisèle Pickering
- CHU Clermont-Ferrand, Inserm CIC Inserm 1405, Centre de Pharmacologie Clinique, Clermont-Ferrand, France
- Université Clermont Auvergne, Laboratoire de Pharmacologie, Facultés de Médecine/Pharmacie, Clermont-Ferrand, France
- Inserm, U1107 Neuro-Dol, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France
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Kizilcik N, Koner O. Magnesium Sulfate Reduced Opioid Consumption in Obese Patients Undergoing Sleeve Gastrectomy: a Prospective, Randomized Clinical Trial. Obes Surg 2018; 28:2783-2788. [DOI: 10.1007/s11695-018-3243-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Bamgbade OA. Magnesium suprascapular nerve block for the management of painful shoulder disorders. J Clin Anesth 2017; 44:48-49. [PMID: 29121547 DOI: 10.1016/j.jclinane.2017.10.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 10/28/2017] [Indexed: 10/18/2022]
Affiliation(s)
- Olumuyiwa A Bamgbade
- Department of Anaesthesia, University of British Columbia, Delta Hospital, Vancouver, BC, Canada.
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Rodríguez-Rubio L, Nava E, del Pozo JSG, Jordán J. Influence of the perioperative administration of magnesium sulfate on the total dose of anesthetics during general anesthesia. A systematic review and meta-analysis. J Clin Anesth 2017; 39:129-138. [DOI: 10.1016/j.jclinane.2017.03.038] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 03/08/2017] [Accepted: 03/19/2017] [Indexed: 10/19/2022]
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Bujalska-Zadrożny M, Tatarkiewicz J, Kulik K, Filip M, Naruszewicz M. Magnesium enhances opioid-induced analgesia – What we have learnt in the past decades? Eur J Pharm Sci 2017; 99:113-127. [DOI: 10.1016/j.ejps.2016.11.020] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 11/15/2016] [Accepted: 11/19/2016] [Indexed: 02/07/2023]
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Rodríguez-Rubio L, Solis Garcia Del Pozo J, Nava E, Jordán J. Interaction between magnesium sulfate and neuromuscular blockers during the perioperative period. A systematic review and meta-analysis. J Clin Anesth 2016; 34:524-34. [PMID: 27687446 DOI: 10.1016/j.jclinane.2016.06.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 05/19/2016] [Accepted: 06/15/2016] [Indexed: 11/30/2022]
Affiliation(s)
- Laura Rodríguez-Rubio
- Grupo de Neurofarmacología, Instituto de Investigación en Discapacidades Neurológicas-UCLM, Albacete, España; Servicio de Anestesia y Reanimación, Hospital de Almansa, Albacete, España.
| | - Julian Solis Garcia Del Pozo
- Grupo de Neurofarmacología, Instituto de Investigación en Discapacidades Neurológicas-UCLM, Albacete, España; Servicio de Medicina Interna, Hospital General de Villarrobledo, Albacete, España
| | - Eduardo Nava
- Departamento de Ciencias Médicas, Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, España
| | - Joaquín Jordán
- Grupo de Neurofarmacología, Instituto de Investigación en Discapacidades Neurológicas-UCLM, Albacete, España; Departamento de Ciencias Médicas, Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, España
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Ghaffaripour S, Mahmoudi H, Eghbal H, Rahimi A. The Effect of Intravenous Magnesium Sulfate on Post-Operative Analgesia During Laminectomy. Cureus 2016; 8:e626. [PMID: 27433405 PMCID: PMC4934929 DOI: 10.7759/cureus.626] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Background and Objectives: Post-operative pain control is an important concern for both patients and physicians. Magnesium is being used as an adjuvant for anesthesia and analgesia during and after various surgeries. We aimed to investigate the effects of intravenous magnesium sulfate on post-operative analgesia after laminectomy. Methods Materials: In this randomized double-blind controlled clinical trial, we enrolled 40 adult patients aged 18-60 with American Society of Anesthesiologists (ASA) Class I-II who were candidates for elective laminectomy. The patients were randomly assigned in two control groups and were similarly anesthetized. In the case group, after the induction of anesthesia, a loading dose of magnesium sulfate (30 mg/kg) was administered within five to 10 minutes followed by a maintenance dose of 10 mg/kg/hr up to the end of the surgery; while, the patients in the control group received the same volume of saline. After the surgery, all patients received a patient-controlled intravenous analgesia (PCA) pump containing morphine. The first time of using PCA, the amount of consumed morphine during the first 24 hours, and pain score were recorded at 6,12,18 and 24 hours in the post-operative period. Results: There was no significant difference between the two groups with respect to the amount of morphine consumed in 24 hours after the surgery (P value =0.23), the first time of using of PCA pump (P value =0.79) and pain intensity (P value=0.52). Conclusion: The infusion of Magnesium Sulfate during laminectomy had no effect on patients’ pain and opioid requirement during the first 24 hours after the surgery.
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Affiliation(s)
- Sina Ghaffaripour
- Shiraz Anesthesiology and Critical Care research center, Department of anesthesiology, Shiraz University of Medical Sciences
| | | | - Hossein Eghbal
- Shiraz Anesthesiology and Critical Care research center, Department of anesthesiology, Shiraz University of Medical Sciences
| | - Ashkan Rahimi
- Shiraz Anesthesiology and Critical Care research center, Department of anesthesiology, Shiraz University of Medical Sciences
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Srivastava VK, Mishra A, Agrawal S, Kumar S, Sharma S, Kumar R. Comparative Evaluation of Dexmedetomidine and Magnesium Sulphate on Propofol Consumption, Haemodynamics and Postoperative Recovery in Spine Surgery: A Prospective, Randomized, Placebo Controlled, Double-blind Study. Adv Pharm Bull 2016; 6:75-81. [PMID: 27123421 PMCID: PMC4845545 DOI: 10.15171/apb.2016.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Revised: 02/11/2016] [Accepted: 02/12/2016] [Indexed: 11/09/2022] Open
Abstract
PURPOSE Dexmedetomidine and magnesium sulfate have been used in anesthesia as adjuvant to provide hemodynamic stability and anesthetic agents sparing effect. We compared these effects of dexmedetomidine and magnesium sulfate in spine surgeries. METHODS Ninety patients were randomly assigned to three groups. Group D received dexmedetomidine loading dose 1 µg/kg over a period of 15 minutes and maintenance 0.5 µg/kg/h throughout the surgery. Group M received magnesium sulfate loading dose 50 mg/kg over a period of 15 minutes and maintenance 15 mg/kg/h throughout the surgery. Group C received same volume of normal saline. Heart rate (HR) and blood pressure values were recorded at various intervals. The induction and maintenance doses of anesthetics and recovery parameters were also recorded. RESULTS Heart rate in group D and group M were significantly decreased (p<0.05) during the whole intraoperative period compared to preoperative values. There was a significant difference in HR values between group C, D and M, during the whole intraoperaive period (p<0.05). Blood pressure values were statistically significantly lower in the group D and group M compared to group C after intubation and all time observations of surgery (p<0.05). Both drugs reduced the anesthetic agent's requirement during surgery. However, the recovery parameters were statistically significant increase with magnesium sulphate compared to dexmedetomidine and control groups. CONCLUSION Dexmedetomidine is more effective than magnesium sulfate for maintaining the hemodynamic stability in spine surgeries. Both these drugs also reduce the requirements of anesthetic agents. Recovery from dexmedetomidine is as rapid as control group compared to magnesium sulfate.
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Affiliation(s)
| | | | - Sanjay Agrawal
- Himalayan Institute of Medical Sciences, Dehradun, India
| | - Sanjay Kumar
- Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
| | | | - Raj Kumar
- Apollo Hospitals Bilaspur, Chhattisgarh, India
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Baaklini LG, Arruda GV, Sakata RK. Assessment of the Analgesic Effect of Magnesium and Morphine in Combination in Patients With Cancer Pain: A Comparative Randomized Double-Blind Study. Am J Hosp Palliat Care 2015; 34:353-357. [DOI: 10.1177/1049909115621895] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Background: Morphine is the first-choice drug for moderate-to-severe cancer pain, nevertheless, some patients do not achieve adequate pain relief or exhibit intolerable side effects. The purpose of this study was to establish whether the analgesic effect of morphine improves in patients with cancer when administered in combination with magnesium. Methods: Randomized double-blind study was conducted with 40 patients older than 18 years with cancer pain using morphine. Group 1 (G1) patients were given magnesium sulfate (65 mg elemental magnesium) twice per day by the oral route. Group 2 (G2) patients were given placebo twice per day. All the patients were administered morphine as needed. They were also given acetaminophen at 2 to 3 g/d. Adjuvants could be used when indicated. The following variables were assessed: pain intensity on a numeric scale at baseline and at weeks 1, 2, 3, and 4; functional performance and quality of life at baseline and week 4; and dose of morphine used. Results: No difference was found between the groups as to pain intensity, dose of morphine used, functional performance, quality of life, or side effects. The average daily dose of morphine increased gradually, being significant in G2. Conclusions: The use of morphine combined with elemental magnesium at a dose of 65 mg twice per day by patients with cancer did not induce a better analgesic effect, did not improve their functional performance or quality of life, and did not reduce the occurrence of side effects. The dose of morphine increased significantly in G2.
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Affiliation(s)
| | | | - Rioko Kimiko Sakata
- Department of Anesthesia, Federal University of São Paulo, São Paulo, Brazil
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Razavi SS, Peyvandi H, Badrkhani Jam AR, Safari F, Teymourian H, Mohajerani SA. Magnesium Versus Bupivacaine Infiltration in Controlling Postoperative Pain in Inguinal Hernia Repair. Anesth Pain Med 2015; 5:e30643. [PMID: 26705525 PMCID: PMC4688822 DOI: 10.5812/aapm.30643] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 09/02/2015] [Accepted: 09/22/2015] [Indexed: 11/18/2022] Open
Abstract
Background: Postoperative pain is one of the most common problems after hernia repair. Decrease in postoperative pain accelerates functional recovery, decreases duration of hospital stay and postoperative morbidity. Objectives: To compare postoperative analgesic effect of infiltration of magnesium versus bupivacaine into incision of inguinal hernia repair. Patients and Methods: In a double blind clinical trial, 80 patients’ candidates for elective inguinal hernia repair were enrolled. Right before closure of incision, in Bupivacaine group 5 mL Bupivacaine 0.5% added to 5 mL normal saline and in Magnesium group, 10 mL Magnesium sulfate 20% was infused subcutaneously. Pain score was measured using numeric rating score (NRS) at 1, 3, 6, 12 and 24 hours postoperatively. If NRS was above 3, 1 mg morphine was administered as rescue analgesic until patient felt comfortable or NRS < 3. Results: Postoperative pain scores at 1 and 3 hours were not significantly different between bupivacaine and magnesium groups (P = 0.21, 0.224; respectively). However, at 6 (P = 0.003), 12 (P = 0.028) and 24 (P = 0.022) hours postoperative, pain score (NRS) was significantly lower in bupivacaine group. Number of patients needed at least 1 dose of rescue morphine (P = 0.001), mean number of episodes asked for morphine during next 24 hours (P = 0.001) and total dose of morphine requirement (P = 0.01) were significantly lower in bupivacaine group. Conclusions: Magnesium infiltration did not decrease total dose and number of episodes needed for morphine rescue analgesic. Bupivacaine infiltration into surgical site was more effective than magnesium sulfate infiltration in postoperative pain control.
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Affiliation(s)
- Seyed Sajad Razavi
- Department of Anesthesiology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hasan Peyvandi
- Department of Surgery, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Reza Badrkhani Jam
- Department of Anesthesiology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Farhad Safari
- Department of Anesthesiology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Houman Teymourian
- Department of Anesthesiology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Corresponding author: Houman Teymourian, Department of Anesthesiology, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Tel/Fax: +98-2122343657, E-mail:
| | - Seyed Amir Mohajerani
- Department of Anesthesiology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Bahrenberg A, Dzikiti BT, Fosgate GT, Stegmann FG, Tacke SP, Rioja E. Antinociceptive effects of epidural magnesium sulphate alone and in combination with morphine in dogs. Vet Anaesth Analg 2015; 42:319-28. [DOI: 10.1111/vaa.12211] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2013] [Accepted: 01/29/2014] [Indexed: 01/28/2023]
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Asadollah S, Vahdat M, Yazdkhasti P, Nikravan N. The effect of magnesium sulphate on postoperative analgesia requirements in gynecological surgeries. Turk J Obstet Gynecol 2015; 12:34-37. [PMID: 28913038 PMCID: PMC5558402 DOI: 10.4274/tjod.02439] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Accepted: 10/31/2014] [Indexed: 12/15/2022] Open
Abstract
Objective: Recent studies have shown the positive effect of magnesium sulphate (MgSO4) on pain reduction and postoperative analgesic requirements in patients undergoing surgery. We assessed the effect of MgSO4 on intra-operative and postoperative analgesic requirements in patients undergoing lower abdominal gynecological laparotomy. Materials and Methods: This randomized clinical trial was conducted on 30 female patients at Rasool-e-Akram (referral and academic) hospital in Tehran from August 2012 to March 2013. The patients who were candidates for gynecologic surgeries (hysterectomy and/or myomectomy) were randomized into study (n=15) and control (n=15) groups. Same anesthetic technique was used in all patients. Besides induction of the anesthesia in the study group, we administered MgSO4 50 mg/kg/hr intravenously (IV) for analgesic purposes as a bolus dose and then 8 mg/kg IV as maintenance dose. Control group received the same anesthetic agents and the same amount of isotonic saline instead of MgSO4. Analgesic consumption was measured in both groups postoperatively within 24 hours. The visual analog scale (VAS) was used for the evaluation of postoperative pain in both groups. Results: There was a decrease in analgesic consumption and pain in the group receiving MgSO4, in comparison to control group. Pain severity assessment, 24 hours post operatively showed similar results in both groups. There was a statistically significant difference in prescribed dose of pethidine between study and control groups (p=<0.0001). Conclusion: Intra-operative MgSO4 is effective in postoperative pain control following lower abdominal laparotomy. Further studies with larger sample sizes and longer follow-up should be performed to obtain more information about safety and to determine whether doses of MgSO4 can provide postoperative analgesic benefits.
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Affiliation(s)
- Sara Asadollah
- Iran University Faculty of Medicine, Rasool-e-Akram Hospital, Clinic of Obstetrics and Gynecology, Tehran, Iran
| | - Mansoureh Vahdat
- Iran University Faculty of Medicine, Rasool-e-Akram Hospital, Clinic of Obstetrics and Gynecology, Tehran, Iran
| | - Payman Yazdkhasti
- Iran University Faculty of Medicine, Rasool-e-Akram Hospital, Clinic of Anesthesiology and Pain, Tehran, Iran
| | - Nasrin Nikravan
- Iran University Faculty of Medicine, Rasool-e-Akram Hospital, Clinic of Obstetrics and Gynecology, Tehran, Iran
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Effect of low-dose (single-dose) magnesium sulfate on postoperative analgesia in hysterectomy patients receiving balanced general anesthesia. Anesthesiol Res Pract 2015; 2015:306145. [PMID: 25705223 PMCID: PMC4330950 DOI: 10.1155/2015/306145] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 12/16/2014] [Accepted: 01/15/2015] [Indexed: 11/19/2022] Open
Abstract
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−1 in 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). Pethidine requirement 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.
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Park JH, Shim JK, Song JW, Jang J, Kim JH, Kwak YL. A Randomized, Double-blind, Non-inferiority Trial of Magnesium Sulphate versus Dexamethasone for Prevention of Postoperative Sore Throat after Lumbar Spinal Surgery in the Prone Position. Int J Med Sci 2015; 12:797-804. [PMID: 26516308 PMCID: PMC4615240 DOI: 10.7150/ijms.12831] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Accepted: 09/02/2015] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Postoperative sore throat (POST) is a frequent complication of tracheal intubation, particularly after surgery in the prone position. We designed this study to validate the non-inferiority of magnesium sulphate against dexamethasone for prevention of POST after lumbar spinal surgery. METHODS One hundred and forty-six patients were randomly allocated to receive either magnesium or dexamethasone. Before anesthetic induction, the magnesium group (n = 73) received magnesium sulphate 30 mg/kg followed by 10 mg/kg/h by continuous infusion until the end of surgery. The dexamethasone group (n = 73) received dexamethasone 8 mg. The primary endpoint was the overall incidence of POST, which was assessed serially over 48 hr postoperatively. The predefined margin of non-inferiority for magnesium against dexamethasone was 15%. RESULTS Overall incidences of POST at rest (50.7% versus 49.3% in the magnesium and dexamethasone group, respectively, p = 0.869) and swallowing (65.8% versus 61.6% in the magnesium and dexamethasone group, respectively, p = 0.606) were not different between the groups. The upper limit of the 90% confidence interval, which must be lower than the predefined margin of non-inferiority to prove the non-inferiority of magnesium sulphate against dexamethasone, for at rest and swallowing were 14.97% (p = 0.0496) and 17.19% (p = 0.0854), respectively. The incidences and severities of POST and hoarseness were also not different between the groups throughout the study period. CONCLUSIONS Prophylactic magnesium sulphate appears to be non-inferior to dexamethasone for the prevention of POST at rest in patients undergoing lumbar spinal surgery in the prone position.
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Affiliation(s)
- Jin Ha Park
- 1. Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine
| | - Jae-Kwang Shim
- 2. Department of Anesthesiology and Pain Medicine and Anesthesia and Pain Research Institute, Yonsei Cardiovascular Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jong-Wook Song
- 2. Department of Anesthesiology and Pain Medicine and Anesthesia and Pain Research Institute, Yonsei Cardiovascular Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jaewon Jang
- 1. Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine
| | - Ji Hoon Kim
- 1. Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine
| | - Young-Lan Kwak
- 2. Department of Anesthesiology and Pain Medicine and Anesthesia and Pain Research Institute, Yonsei Cardiovascular Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea
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Rezae M, Naghibi K, Taefnia AM. Effect of pre-emptive magnesium sulfate infusion on the post-operative pain relief after elective cesarean section. Adv Biomed Res 2014; 3:164. [PMID: 25221767 PMCID: PMC4162070 DOI: 10.4103/2277-9175.139127] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2013] [Accepted: 07/10/2013] [Indexed: 12/20/2022] Open
Abstract
Background: The aim of this study was to evaluate the analgesic efficacy of pre-operative single dose of intravenous (I.V.) magnesium sulfate infusion in patients undergoing elective Cesarean section. Materials and Methods: Seventy pregnant women who underwent elective Cesarean section were randomly divided into two groups. Before induction of anesthesia, the magnesium group (Group A) received magnesium sulfate 50 mg/kg I.V. in bolus dose. The control group (Group B) received the same volume of isotonic saline. The pain scores at rest and also upon movement were evaluated up to 24 h post-operatively and analgesic requirement was recorded during the first 24 h after operation. Results: Cumulative analgesic consumption (24 h after operation was 11.2 ± 6.3 mg in group A vs. 13.9 ± 3.9 mg in group B). Post-operative pain scores (24 h after operation was 1.8 ± 2.1 in group A vs. 2.9 ± 1.2 in group B) and shivering incidents (8.57 in group A vs. 14.28 in group B) were significantly lower in Group A (P < 0.05). Mean arterial pressure just after intubation and during the immediate post-operative period was significantly lower in Group A (P < 0.05). Conclusion: Pre-operative intravenous magnesium sulfate infusion decrease post-operation pain and requirement of analgesia in Cesarean section.
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Affiliation(s)
- Marzieh Rezae
- Department of Obstetrics and Gynecology, School of Medicine and Student Research Committee, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Khosrou Naghibi
- Department of Anesthesiology, Isfahan University of Medical Sciences, Isfahan, Iran
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JABBOUR HJ, NACCACHE NM, JAWISH RJ, ABOU ZEID HA, JABBOUR KB, RABBAA-KHABBAZ LG, GHANEM IB, YAZBECK PH. Ketamine and magnesium association reduces morphine consumption after scoliosis surgery: prospective randomised double-blind study. Acta Anaesthesiol Scand 2014; 58:572-9. [PMID: 24635528 DOI: 10.1111/aas.12304] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/11/2014] [Indexed: 11/29/2022]
Abstract
BACKGROUND Scoliosis repair is a major orthopaedic surgery associated with severe post-operative pain. Ketamine and magnesium have an established efficacy as morphine-sparing agents. Our purpose was to evaluate the morphine-sparing effect of both magnesium and ketamine given simultaneously compared with ketamine alone during scoliosis surgery. METHODS Fifty patients scheduled for posterior instrumentation were randomised in a prospective double-blind study. The Gr (K + Mg) received, after induction, an intravenous (IV) bolus of ketamine 0.2 mg/kg and magnesium 50 mg/kg, followed by continuous infusion of ketamine (0.15 mg/kg/h) and magnesium (8 mg/kg/h) until extubation. The Gr (K) received the same dose of ketamine associated with bolus and continuous infusion of normal saline. All patients received multimodal analgesia associated with IV morphine administered via patient-controlled analgesia pump. Morphine consumption, visual analogue scale (VAS) pain scores and occurrence of side effects were followed until 48 h post-operatively. Sleep quality and patient satisfaction were also followed. P < 0.05 was considered statistically significant. RESULTS The average cumulative morphine consumption was significantly lower in the Gr (K + Mg) compared with the Gr (K) at post-operative hours 4, 8, 12, 18, 30, 36 and 48. The relative difference in the post-operative morphine consumption was 29.5%: Gr (K + Mg) 51.53 mg vs. Gr (K) 73.16 mg. VAS scores were not statistically different between the two groups. However, qualities of sleep and satisfaction scores on the first night were significantly better in the Gr (K + Mg) (P = 0.027 and P = 0.016, respectively). CONCLUSION Ketamine and magnesium association reduces the post-operative morphine consumption after scoliosis surgery. It seems to provide a better sleep quality and improves patient satisfaction.
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Affiliation(s)
- H. J. JABBOUR
- Departments of Anesthesia and Critical Care; Hôtel Dieu de France; Université Saint Joseph; Beirut Lebanon
| | - N. M. NACCACHE
- Departments of Anesthesia and Critical Care; Hôtel Dieu de France; Université Saint Joseph; Beirut Lebanon
| | - R. J. JAWISH
- Departments of Anesthesia and Critical Care; Hôtel Dieu de France; Université Saint Joseph; Beirut Lebanon
| | - H. A. ABOU ZEID
- Departments of Anesthesia and Critical Care; Hôtel Dieu de France; Université Saint Joseph; Beirut Lebanon
| | - K. B. JABBOUR
- Departments of Anesthesia and Critical Care; Hôtel Dieu de France; Université Saint Joseph; Beirut Lebanon
| | - L. G. RABBAA-KHABBAZ
- Department of Pharmacy; Hôtel Dieu de France; Université Saint Joseph; Beirut Lebanon
| | - I. B. GHANEM
- Department of Orthopedic Surgery; Hôtel Dieu de France; Université Saint Joseph; Beirut Lebanon
| | - P. H. YAZBECK
- Departments of Anesthesia and Critical Care; Hôtel Dieu de France; Université Saint Joseph; Beirut Lebanon
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Abstract
Abstract
Background:
Systemic magnesium has been used to minimize postoperative pain with conflicting results by clinical studies. It remains unknown whether the administration of perioperative systemic magnesium can minimize postoperative pain. The objective of the current investigation was to evaluate the effect of systemic magnesium on postoperative pain outcomes.
Methods:
A wide search was performed to identify randomized controlled trials that evaluated the effects of systemic magnesium on postoperative pain outcomes in surgical procedures performed under general anesthesia. Meta-analysis was performed using a random-effect model. Publication bias was evaluated by examining the presence of asymmetric funnel plots using Egger regression.
Results:
Twenty randomized clinical trials with 1,257 subjects were included. The weighted mean difference (99% CI) of the combined effects favored magnesium over control for pain at rest (≤4 h, −0.74 [−1.08 to −0.48]; 24 h, −0.36 [−0.63 to −0.09]) and with movement at 24 h, −0.73 (−1.37 to −0.1). Opioid consumption was largely decreased in the systemic magnesium group compared with control, weighted mean difference (99% CI) of −10.52 (−13.50 to −7.54) mg morphine IV equivalents. Publication bias was not present in any of the analysis. Significant heterogeneity was present in some analysis, but it could be partially explained by the sole intraoperative administration of magnesium compared with the intraoperative and postoperative administration. None of the studies reported clinical toxicity related to toxic serum levels of magnesium.
Conclusion:
Systemic administration of perioperative magnesium reduces postoperative pain and opioid consumption. Magnesium administration should be considered as a strategy to mitigate postoperative pain in surgical patients.
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Albrecht E, Kirkham KR, Liu SS, Brull R. Peri-operative intravenous administration of magnesium sulphate and postoperative pain: a meta-analysis. Anaesthesia 2012; 68:79-90. [DOI: 10.1111/j.1365-2044.2012.07335.x] [Citation(s) in RCA: 268] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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The effect of intravenous magnesium therapy on the duration of intrathecal fentanyl labor analgesia. Int J Obstet Anesth 2012; 21:212-6. [DOI: 10.1016/j.ijoa.2012.01.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Revised: 01/24/2012] [Accepted: 01/28/2012] [Indexed: 11/22/2022]
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Lee C, Song YK, Jeong HM, Park SN. The effects of magnesium sulfate infiltration on perioperative opioid consumption and opioid-induced hyperalgesia in patients undergoing robot-assisted laparoscopic prostatectomy with remifentanil-based anesthesia. Korean J Anesthesiol 2011; 61:244-50. [PMID: 22025948 PMCID: PMC3198187 DOI: 10.4097/kjae.2011.61.3.244] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Revised: 03/14/2011] [Accepted: 03/14/2011] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Opioids not only exert an antinociceptive effect, but also modulate central N-methyl-D-aspartate (NMDA) receptors, resulting in hyperalgesia and acute opioid tolerance. This study was aimed to investigate the effect of the NMDA receptor antagonist, magnesium in preventing remifentanil-induced hyperalgesia. METHODS For this study, 75 patients scheduled for robot-assisted laparoscopic prostatectomy were randomly allocated into three groups of patients whose incision sites were infiltrated: Group M, with 25% magnesium sulfate 80 mg/kg; Group S, with the same volume of saline under remifentanil-based anesthesia, and Group D, with the same volume of saline under desflurane based anesthesia. All three groups were infiltrated into incision sites after pneumoperitoneum. Intraoperative evaluation included mean remifentanil dose, and postoperative evaluation included pain severity at time intervals of 30 min, 6, 12, 24 and 36 hours, time to first postoperative analgesic requirement, and analgesic dosage required during 24 hours. RESULTS Mean remifentanil doses during the intraoperative periods in group M were significantly lower than those in group S (P < 0.001). The time to first postoperative analgesic requirement in postoperative period in groups M and D was significantly longer than that in group S (P < 0.001). Visual analog scale scores for pain in groups M and D were significantly lower than those in group S for 12 hours after operation. CONCLUSIONS A relatively high dose and continuous infusion of remifentanil were associated with opioid induced hyperalgesia. Wound infiltration with magnesium sulfate decreased opioid consumption and reduces opioid induced hyperalgesia.
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Affiliation(s)
- Cheol Lee
- Department of Anesthesiology and Pain Medicine, Wonkwang University School of Medicine, Iksan, Korea
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Saadawy IM, Kaki AM, Abd El Latif AA, Abd-Elmaksoud AM, Tolba OM. Lidocaine vs. magnesium: effect on analgesia after a laparoscopic cholecystectomy. Acta Anaesthesiol Scand 2010; 54:549-56. [PMID: 19919581 DOI: 10.1111/j.1399-6576.2009.02165.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
BACKGROUND This double-blinded study aimed at evaluating and comparing the effects of magnesium and lidocaine on pain, analgesic requirements, bowel function, and quality of sleep in patients undergoing a laparoscopic cholecystectomy (LC). METHODS Patients were randomized into three groups (n=40 each). Group M received magnesium sulfate 50 mg/kg intravenously (i.v.), followed by 25 mg/kg/h i.v., group L received lidocaine 2 mg/kg i.v., followed by 2 mg/kg/h i.v., and group P received saline i.v. Bolus doses were given over 15 min before induction of anesthesia, followed by an i.v. infusion through the end of surgery. Intraoperative fentanyl consumption and averaged end-tidal sevoflurane concentration were recorded. Abdominal and shoulder pain were evaluated up to 24 h using a visual analog scale (VAS). Morphine consumption was recorded at 2 and 24 h, together with quality of sleep and time of first flatus. RESULTS Lidocaine or magnesium reduced anesthetic requirements (P<0.01), pain scores (P<0.05), and morphine consumption (P<0.001) relative to the control group. Lidocaine resulted in lower morphine consumption at 2 h [4.9 + or - 2.3 vs. 6.8 + or - 2.8 (P<0.05)] and lower abdominal VAS scores compared with magnesium (1.8 + or - 0.8 vs. 3.2 + or - 0.9, 2.2 + or - 1 vs. 3.6 + or - 1.6, and 2.1 + or - 1.4 vs. 3.3 + or - 1.9) at 2, 6, and 12 h, respectively (P<0.05). Lidocaine was associated with earlier return of bowel function and magnesium was associated with better sleep quality (P<0.05). CONCLUSION I.v. lidocaine and magnesium improved post-operative analgesia and reduced intraoperative and post-operative opioid requirements in patients undergoing LC. The improvement of quality of recovery might facilitate rapid hospital discharge.
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Affiliation(s)
- I M Saadawy
- Department of Anaesthesia, King Abdulaziz University, Jeddah, Saudi Arabia.
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Hwang JY, Na HS, Jeon YT, Ro YJ, Kim CS, Do SH. I.V. infusion of magnesium sulphate during spinal anaesthesia improves postoperative analgesia. Br J Anaesth 2010; 104:89-93. [DOI: 10.1093/bja/aep334] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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Na HS, Lee JH, Hwang JY, Ryu JH, Han SH, Jeon YT, Do SH. Effects of magnesium sulphate on intraoperative neuromuscular blocking agent requirements and postoperative analgesia in children with cerebral palsy. Br J Anaesth 2009; 104:344-50. [PMID: 20042475 DOI: 10.1093/bja/aep379] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND In this double-blind, randomized, placebo-controlled study, we evaluated the effects of magnesium sulphate on neuromuscular blocking agent requirements and analgesia in children with cerebral palsy (CP). METHODS We randomly divided 61 children with CP undergoing orthopaedic surgery into two groups. The magnesium group (Group M) received magnesium sulphate 50 mg kg(-1) i.v. as a bolus and 15 mg kg(-1) h(-1) by continuous infusion during the operation. The control group (Group S) received the same amount of isotonic saline. Rocuronium was administered 0.6 mg kg(-1) before intubation and 0.1 mg kg(-1) additionally when train-of-four counts were 2 or more. I.V. fentanyl and ketorolac were used to control postoperative pain. Total infused analgesic volumes and pain scores were evaluated at postoperative 30 min, and at 6, 24, and 48 h. RESULTS The rocuronium requirement of Group M was significantly less than that of Group S [0.29 (0.12) vs 0.42 (0.16) mg kg(-1) h(-1), P<0.05]. Cumulative analgesic consumption in Group M was significantly less after operation at 24 and 48 h (P<0.05), and pain scores in Group M were lower than in Group S during the entire postoperative period (P<0.05). Serum magnesium concentrations in Group M were higher until 24 h after operation (P<0.05). The incidence of postoperative nausea and vomiting and rescue drug injections was similar in the two groups. No shivering or adverse effects related to hypermagnesaemia were encountered. CONCLUSIONS I.V. magnesium sulphate reduces rocuronium requirements and postoperative analgesic consumption in children with CP.
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Affiliation(s)
- H-S Na
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi-do, Republic of Korea
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Lee DH, Kwon IC. Magnesium sulphate has beneficial effects as an adjuvant during general anaesthesia for Caesarean section. Br J Anaesth 2009; 103:861-6. [PMID: 19783538 DOI: 10.1093/bja/aep265] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND The use of low concentrations of volatile anaesthetics with avoidance of opioids may induce intraoperative awareness and adverse haemodynamic responses during Caesarean section. Magnesium is well known to reduce anaesthetic requirements and to block noxious stimuli. We investigated whether i.v. magnesium sulphate modulates anaesthetic depth and analgesic efficacy during Caesarean section. METHODS Seventy-two patients undergoing Caesarean section were randomly assigned to receive i.v. saline (control group) or magnesium sulphate 30 mg kg(-1) bolus+10 mg kg(-1) h(-1) continuous infusion (Mg 30 group) or 45 mg kg(-1) bolus+15 mg kg(-1) h(-1) continuous infusion (Mg 45 group) after induction. Bispectral index (BIS) value, mean arterial pressure (MAP), and midazolam, fentanyl, and atracurium consumptions were recorded. RESULTS BIS values [mean (sd)] at 7.5 and 10 min after surgery and before delivery in the control [64 (9), 66 (8), 67 (8), P<0.001] and the Mg 30 groups [62 (8), P<0.01; 64 (7), 63 (9), P<0.001] were higher than in the Mg 45 group [56 (8), 55 (8), 55 (7)]. MAP was greater in the control group (P<0.05) than in the Mg 30 and Mg 45 groups during the pre-delivery period. The magnesium groups required less midazolam (P<0.05), fentanyl (Mg 30, P<0.05; Mg 45, P<0.01), and atracurium (P<0.001) vs the control group. CONCLUSIONS Preoperative i.v. magnesium sulphate attenuated BIS and arterial pressure increases during the pre-delivery period. Magnesium sulphate can be recommended as an adjuvant during general anaesthesia for Caesarean section to avoid perioperative awareness and pressor response resulting from inadequate anaesthesia, analgesia, or both.
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Affiliation(s)
- D H Lee
- Department of Anaesthesiology and Pain Medicine, College of Medicine, Yeungnam University, Daegu, Republic of Korea.
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Reuben SS, Yalavarthy L. Preventing the Development of Chronic Pain After Thoracic Surgery. J Cardiothorac Vasc Anesth 2008; 22:890-903. [DOI: 10.1053/j.jvca.2008.02.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2008] [Indexed: 11/11/2022]
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Mentes O, Harlak A, Yigit T, Balkan A, Balkan M, Cosar A, Savaser A, Kozak O, Tufan T. Effect of intraoperative magnesium sulphate infusion on pain relief after laparoscopic cholecystectomy. Acta Anaesthesiol Scand 2008; 52:1353-9. [PMID: 19025527 DOI: 10.1111/j.1399-6576.2008.01816.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
INTRODUCTION The aim of the study is to evaluate the analgesic efficiency of perioperative magnesium sulphate infusion in patients undergoing laparoscopic cholecystectomy (LC). METHODS In a randomized, double-blind trial study, 83 patients were divided into two groups. Group MT received 50 mg/kg i.v. magnesium sulphate in 100 ml of 0.9% normal saline and Group T received the same volume of isotonic saline during the intraoperative period. The cumulative post-operative tramadol consumption was measured to assess the analgesic effect using a patient-controlled analgesia device. Pain intensities at rest and while coughing were evaluated at 0, 2, 4, 8, 12, and 24 h post-operatively. RESULTS The pain scores in Group MT were significantly lower than Group T at 0, 4, and 12 h post-operatively. The average of visual analogue scale at rest and during cough during 24 h post-operatively was found to be statistically significant between groups. The total dose of tramadol the 24-h period in Group MT and Group T was found to be 281.34 +/- 90.82 and 317.46 +/- 129.59, respectively. CONCLUSION Per-operative 50 mg/kg magnesium sulphate infusion is effective in reducing post-operative pain in patients undergoing LC.
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Affiliation(s)
- O Mentes
- Department of General Surgery, Gülhane Military Medical Faculty, Ankara, Turkey.
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Ryu JH, Kang MH, Park KS, Do SH. Effects of magnesium sulphate on intraoperative anaesthetic requirements and postoperative analgesia in gynaecology patients receiving total intravenous anaesthesia. Br J Anaesth 2008; 100:397-403. [PMID: 18276652 DOI: 10.1093/bja/aem407] [Citation(s) in RCA: 133] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND This randomized, double-blind, prospective study was undertaken to evaluate the effects of magnesium sulphate on anaesthetic requirements and postoperative analgesia in patients undergoing total i.v. anaesthesia (TIVA). METHODS Fifty patients who underwent gynaecological surgery were randomly divided into two groups. Before induction of anaesthesia, the magnesium group (Group M) received magnesium sulphate 50 mg kg(-1) i.v. as a bolus and then 15 mg kg(-1) h(-1) i.v. by continuous infusion. The control group (Group S) received the same amount of isotonic saline. TIVA (propofol+remifentanil) was administered under bispectral index monitoring during anaesthesia induction and maintenance. Rocuronium was administered before orotracheal intubation and during surgery when the train-of-four count was 2 or more. After operation, patient-controlled analgesia with a solution of ketorolac and morphine was used and the consumption of this solution was recorded. Pain scores at rest and upon movement were evaluated 30 min, 4, 24, and 48 h after surgery. RESULTS Patients in Group M required less rocuronium than those in Group S [mean (SD) 0.44 (0.09) vs 0.35 (0.07) microg kg(-1) min(-1), P<0.05]. The total amounts of propofol and remifentanil administered were similar in the two groups. Postoperative pain scores, cumulative analgesic consumption, and shivering incidents were significantly lower in Group M (P<0.05). Mean arterial pressure just after intubation and during the immediate postoperative period was also significantly lower in Group M (P<0.05). CONCLUSIONS I.v. magnesium sulphate during TIVA reduced rocuronium requirement and improved the quality of postoperative analgesia.
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Affiliation(s)
- J-H Ryu
- Department of Anaesthesiology and Pain Medicine, Seoul National University Hospital, Seoul, South Korea
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Farajidavar A, Towhidkhah F, Mirhashemi A, Gharibzadeh S, Behbehani K. Computational modeling of Abeta fiber wind-up. CONFERENCE PROCEEDINGS : ... ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL CONFERENCE 2007; 2006:4975-8. [PMID: 17946665 DOI: 10.1109/iembs.2006.259604] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Wind-up, a condition related to chronic pain, is described traditionally as a frequency dependent increase in the excitability of sensory spinal cord neurons, evoked by electrical stimulation of small pain fibers. In this paper, we introduce a computational model on wind-up of large (Abeta) fibers, considering three major mechanisms of wind-up: 1) a feedforward mechanism causing Ca2+ entry, 2) a positive feedback, causing more Ca2+ entry, and 3) a feedforward due to sprouting of Abeta fibers towards the small pain fibers. Our model proposes three different ways for reducing wind-up and shows the most important way to treat the pain.
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Affiliation(s)
- Aydin Farajidavar
- Neuromuscular Syst. Lab., Fac. of Biomed. Eng., Amirkabir Univ. of Technol., Hafez, Tehran, Iran.
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Lysakowski C, Dumont L, Czarnetzki C, Tramèr MR. Magnesium as an adjuvant to postoperative analgesia: a systematic review of randomized trials. Anesth Analg 2007; 104:1532-9, table of contents. [PMID: 17513654 DOI: 10.1213/01.ane.0000261250.59984.cd] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND Randomized trials have reached different conclusions as to whether magnesium is a useful adjuvant to postoperative analgesia. METHODS We performed a comprehensive search (electronic databases, bibliographies, all languages, to 4.2006) for randomized comparisons of magnesium and placebo in the surgical setting. Information on postoperative pain intensity and analgesic requirements was extracted from the trials and compared qualitatively. Dichotomous data on adverse effects were combined using classic methods of meta-analysis. RESULTS Fourteen randomized trials (778 patients, 404 received magnesium) tested magnesium laevulinate, gluconate or sulfate. With magnesium, postoperative pain intensity was significantly decreased in four (29%) trials, was no different from placebo in seven (50%), and was increased in one (7%); two trials (14%) did not report on pain intensity. With magnesium, postoperative analgesic requirements were significantly reduced in eight (57%) trials, were no different from placebo in five (36%), and were increased in one (7%). Magnesium-treated patients had less postoperative shivering (relative risk 0.38, 95% confidence interval 0.17-0.88, number-needed-to-treat 14). Seven trials reported on magnesium serum levels. In all, serum levels were increased in patients who received magnesium; in six, serum levels were decreased in those who received placebo. CONCLUSIONS These trials do not provide convincing evidence that perioperative magnesium may have favorable effects on postoperative pain intensity and analgesic requirements. Perioperative magnesium supplementation prevents postoperative hypomagnesemia and decreases the incidence of postoperative shivering. It may be worthwhile to further study the role of magnesium as a supplement to postoperative analgesia, since this relatively harmless molecule is inexpensive, and the biological basis for its potential antinociceptive effect is promising.
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Affiliation(s)
- Christopher Lysakowski
- Division of Anesthesiology, Department Anesthesiology, Pharmacology and Intensive Care, Geneva University Hospitals, Geneva, Switzerland.
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Vohra V, Gupta K. A reply. Anaesthesia 2007. [DOI: 10.1111/j.1365-2044.2007.05113_2.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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