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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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Xu H, Hao C, Wang X, Du J, Zhang T, Zhang X. Effect of Intraoperative infusion Magnesium Sulfate Infusion on Postoperative Quality of Recovery in Patients Undergoing Total Knee Arthroplasty: A Prospective, Double-Blind, Randomized Controlled Trial. Drug Des Devel Ther 2024; 18:919-929. [PMID: 38560523 PMCID: PMC10980840 DOI: 10.2147/dddt.s444896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 03/14/2024] [Indexed: 04/04/2024] Open
Abstract
Background Magnesium sulfate, an intravenous adjuvant, has recently attracted immense attention in multimodal analgesia. Previous studies confirmed the crucial role of magnesium sulfate in postoperative pain and nociceptive hypersensitivity. However, the effect of magnesium sulfate in multimodal analgesia on the quality of recovery (QoR) for elderly patients has not been thoroughly studied. Therefore, the present experiment aimed to investigate the effect of continuous intravenous magnesium sulfate on the quality of postoperative recovery in elderly patients undergoing total knee arthroplasty (TKA). Patients and Methods In this study, a total of 148 patients scheduled to undergo unilateral total knee arthroplasty were randomized into a magnesium sulfate group (Group M, n=68) and a control group (Group C, n=66) using a double-blind, randomized controlled trial. Before induction of anesthesia, Group M received intravenous magnesium sulfate (40 mg/kg) for 15 min, followed by a continuous infusion (15 mg/kg) until the end of the procedure. In the same manner, Group C received an infusion of the same amount of isotonic saline using the same method as the Group M. Results Compared with Group C, Group M had significantly better QoR-15 scores on postoperative day 1(POD1) than Group C (P <0.05). Analysis of the dimensions of QoR-15 scores indicated that Group M exhibited notably reduced levels of pain, and higher levels of emotional state and physical comfort than Group C (P <0.05). Furthermore, Group C had significantly higher numerical rating scale (NRS) scores at POD1 than Group M (P <0.05). Conclusion For elderly patients undergoing knee arthroplasty, magnesium sulfate can be used as an adjuvant in a multimodal analgesic regimen to reduce early postoperative pain and improve the quality of early postoperative recovery.
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Affiliation(s)
- Hai Xu
- Department of Anesthesiology, Graduate Training Base of Lianyungang First People’s Hospital of Jinzhou Medical University, Lianyungang, Jiangsu, People’s Republic of China
| | - Conghui Hao
- Department of Anesthesiology, Graduate Training Base of Lianyungang First People’s Hospital of Jinzhou Medical University, Lianyungang, Jiangsu, People’s Republic of China
| | - Xinxin Wang
- Department of Anesthesiology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, Lianyungang, Jiangsu, People’s Republic of China
| | - Jingjing Du
- Department of Anesthesiology, Graduate Training Base of Lianyungang First People’s Hospital of Jinzhou Medical University, Lianyungang, Jiangsu, People’s Republic of China
| | - Tianyu Zhang
- Department of Anesthesiology, Graduate Training Base of Lianyungang First People’s Hospital of Jinzhou Medical University, Lianyungang, Jiangsu, People’s Republic of China
| | - Xiaobao Zhang
- Department of Anesthesiology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, Lianyungang, Jiangsu, People’s Republic of China
- Department of Anesthesiology, The First Affiliated Hospital of Kangda College of Nanjing Medical University, Lianyungang, Jiangsu, People’s Republic of China
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Dahake JS, Verma N, Bawiskar D. Magnesium Sulfate and Its Versatility in Anesthesia: A Comprehensive Review. Cureus 2024; 16:e56348. [PMID: 38633961 PMCID: PMC11021848 DOI: 10.7759/cureus.56348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 03/17/2024] [Indexed: 04/19/2024] Open
Abstract
In the field of general anesthesia, magnesium sulfate (MgSO4) has become a valuable adjunct because it provides a range of benefits that enhance and optimize conventional aesthetic procedures. This review highlights the various intra-anesthetic benefits of MgSO4 while examining its complex function in the treatment using anesthesia. Magnesium inhibits the release of acetylcholine at the motor endplate and blocks calcium channels at presynaptic nerve terminals. This reduces the amplitude of endplate potential and the excitability of muscle fibers, which increases the potency of a neuromuscular blockade by nondepolarizing neuromuscular blockers. This activity may lessen the need for primary muscle relaxants. Moreover, its capacity to potentially reduce the total amount of main aesthetic agents needed emphasizes its function in maximizing anesthesia dosage, ensuring sufficient depth while perhaps potentially reducing adverse effects linked with increased dosages. MgSO4's adaptable qualities present a viable path for improving anesthetic outcomes, possibly improving patient safety and improving surgical results.
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Affiliation(s)
- Janhavi S Dahake
- Anesthesia, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education and Research, Wardha, IND
| | - Neeta Verma
- Anesthesia, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education and Research, Wardha, IND
| | - Dushyant Bawiskar
- Sports Physiotherapy, Abhinav Bindra Targeting Performance, Bengaluru, IND
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Preoperative effects of magnesium sulfate on hemodynamics and muscle relaxation. JOURNAL OF SURGERY AND MEDICINE 2021. [DOI: 10.28982/josam.954330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lee JH, Choi S, Lee M, Jang YE, Kim EH, Kim JT, Kim HS. Effect of magnesium supplementation on emergence delirium and postoperative pain in children undergoing strabismus surgery: a prospective randomised controlled study. BMC Anesthesiol 2020; 20:289. [PMID: 33208099 PMCID: PMC7672912 DOI: 10.1186/s12871-020-01192-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 10/20/2020] [Indexed: 12/29/2022] Open
Abstract
Background The benefits of intraoperative magnesium supplementation have been reported. In this prospective, randomized study, the effects of magnesium supplementation during general anaesthesia on emergence delirium and postoperative pain in children were evaluated. Methods A total of 66 children aged 2 to 5 years who underwent strabismus surgery were assigned to the magnesium or to the control group. Preoperative anxiety was assessed using the modified Yale Preoperative Anxiety Scale. After anaesthesia induction, the magnesium group received an initial loading dose of 30 mg/kg magnesium sulphate over 10 min and, then, continuous infusion of 10 mg/kg per h until 10 min before the end of the surgery. The control group received an equal volume of normal saline via the same regimen. The Paediatric Anaesthesia Emergence Delirium (PAED) score, pain score, and respiratory events were assessed at the postanaesthetic care unit. Results Data obtained from 65 children were analyzed. The PAED and pain scores of the two groups did not differ significantly. There were 26 of 33 (78.8%) and 27 of 32 (84.4%) children with emergence delirium in the control and the magnesium groups, respectively (odds ratio 0.69, 95% CI 0.19–2.44; p = 0.561). The preoperative anxiety score was not significantly correlated with the PAED score. The incidence of respiratory events during the emergence period did not differ significantly between the two groups. Conclusions Magnesium supplementation during anaesthesia had no significant effects on the incidence of emergence delirium or postoperative pain in children undergoing strabismus surgery. Trial registration ClinicalTrials.gov (NCT03132701). Prospectively registered May 8, 2017.
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Affiliation(s)
- Ji-Hyun Lee
- Department of Anaesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of Medicine, # 101 Daehakno, Jongnogu, Seoul, 03080, Republic of Korea
| | - Seungeun Choi
- Department of Anaesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of Medicine, # 101 Daehakno, Jongnogu, Seoul, 03080, Republic of Korea
| | - Minkyoo Lee
- Department of Anaesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of Medicine, # 101 Daehakno, Jongnogu, Seoul, 03080, Republic of Korea
| | - Young-Eun Jang
- Department of Anaesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of Medicine, # 101 Daehakno, Jongnogu, Seoul, 03080, Republic of Korea
| | - Eun-Hee Kim
- Department of Anaesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of Medicine, # 101 Daehakno, Jongnogu, Seoul, 03080, Republic of Korea
| | - Jin-Tae Kim
- Department of Anaesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of Medicine, # 101 Daehakno, Jongnogu, Seoul, 03080, Republic of Korea
| | - Hee-Soo Kim
- Department of Anaesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of Medicine, # 101 Daehakno, Jongnogu, Seoul, 03080, Republic of Korea.
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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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Rajabi M, Razavizade MR, Hamidi-Shad M, Tabasi Z, Akbari H, Hajian A. Magnesium Sulfate and Clonidine; Effects on Hemodynamic Factors and Depth of General Anesthesia in Cesarean Section. Anesth Pain Med 2020; 10:e100563. [PMID: 34150557 PMCID: PMC8207846 DOI: 10.5812/aapm.100563] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 07/29/2020] [Accepted: 08/20/2020] [Indexed: 01/01/2023] Open
Abstract
Background Making stable hemodynamic and also durable unawareness is a daily challenge in the setting of general anesthesia in women who undergo surgical delivery of neonate and have limitations to receive opioids derivatives. Objectives We aimed to evaluate the effects of magnesium sulfate and clonidine on hemodynamic changes and depth of anesthesia and in mentioned mothers and also in neonatal APGAR index. Methods Current randomized, double-blind controlled trial study was conducted among a total of 360 pregnant females (38 - 41 weeks of gestation) who underwent elective cesarean section. Participants were randomly divided into three drug-receiving groups (equal 120 members): magnesium sulfate (30 mg/kg), clonidine (3 µg/kg), and placebo (0.9% NaCl). Patients’ blood pressure, heart rate, cerebral state index (CSI) in specific time zones, and also late 24-hour recall were recorded. The CSI is an electroencephalographic monitoring method helping to assess the depth of anesthesia. Neonatal parameters, including APGAR score and umbilical venous blood sampling, were measured. Results Mean patients’ age was 28 ± 4.5. A significant decreasing and stabilizing effect of magnesium sulfate and clonidine on hemodynamic parameters (blood pressure and heart rate) was revealed (P < 0.001). Evidence implied on deeper anesthesia (lower CSI) among drug receivers comparing to placebo (P < 0.001). None of the participants experienced a late 24-hour recall postoperatively. All neonates were healthy, and no decrease was reported in APGAR score at minutes 1 and 5. Umbilical blood gas analysis showed no signs of acidosis and/or hypoxemia. Conclusions Adjuvant administration of either magnesium sulfate or clonidine is associated with hemodynamic stability and favorable unawareness in the setting of elective surgical delivery.
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Affiliation(s)
- Mehdi Rajabi
- Trauma Research Center, Kashan University of Medical Sciences, Kashan, Iran
| | - Mohammad-Reza Razavizade
- Trauma Research Center, Kashan University of Medical Sciences, Kashan, Iran
- Corresponding Author: Trauma Research Center, Kashan University of Medical Sciences, Kashan, Iran.
| | - Maryam Hamidi-Shad
- Department of Anesthesiology, Kashan University of Medical Sciences, Kashan, Iran
| | - Zohreh Tabasi
- Department of Gynecology, Kashan University of Medical Sciences, Kashan, Iran
| | - Hossein Akbari
- Department of Biostatistics and Epidemiology, Kashan University of Medical Sciences, Kashan, Iran
| | - Abbas Hajian
- Trauma Research Center, Kashan University of Medical Sciences, Kashan, Iran
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Yoldas H, Yildiz I, Karagoz I, Sit M, Ogun MN, Demirhan A, Bilgi M. Effects of Bispectral Index-controlled Use of Magnesium on Propofol Consumption and Sedation Level in Patients Undergoing Colonoscopy. Medeni Med J 2019; 34:380-386. [PMID: 32821465 PMCID: PMC7433725 DOI: 10.5222/mmj.2019.99705] [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: 09/25/2019] [Accepted: 11/10/2019] [Indexed: 12/16/2022] Open
Abstract
Objective The aim of this study is to investigate the effects of bispectral index-controlled use of magnesium on propofol consumption, periprocedural hemodynamic response and patient comfort. Material A total of 60 patients were enrolled in the study. In Group 1 (magnesium), a single dose 50 mg/kg magnesium sulfate diluted with 100 mL 0.9% NaCl was administered 10 minutes before the beginning of the procedure. Initially bolus dose of 0.5 mg/kg propofol was applied. The maintenance dose of propofol was 60 mcg/kg/min. During the procedure, the propofol infusion was increased by titration until the bispectral index (BIS) value of 70 was achieved. In Group 2 (saline), 100 ml 0.9% NaCl was administered 10 minutes before the beginning of the procedure. The bolus and maintenance doses of propofol, and target BIS values were the same as those in Group 1. Results When BIS values were compared between the groups, the initial BIS values in the magnesium group (Group 1) were significantly higher than those of the saline group (Group 2) (p<0.05). The time to reach BIS 70 was significantly shorter in the magnesium group (p<0.05). Propofol consumption was greater in Group 2 than in Group 1 (p<0.05). The time to reach BIS 70 was significantly shorter in Group 1 (p<0.05). No significant difference was found between the groups in terms of patient- and endoscopist-satisfaction (p<0.05). Conclusion The use of magnesium in addition to propofol may be an efficient and reliable option to reduce the drug consumption during colonoscopic interventions.
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Affiliation(s)
- Hamit Yoldas
- Bolu Abant Izzet Baysal University Faculty of Medicine, Department of Anesthesiology and Reanimation, Bolu, Turkey
| | - Isa Yildiz
- Bolu Abant Izzet Baysal University Faculty of Medicine, Department of Anesthesiology and Reanimation, Bolu, Turkey
| | - Ibrahim Karagoz
- Bolu Abant Izzet Baysal University Faculty of Medicine, Department of Anesthesiology and Reanimation, Bolu, Turkey
| | - Mustafa Sit
- Bolu Abant Izzet Baysal University Faculty of Medicine, Department of General Surgery, Bolu, Turkey
| | - Muhammed Nur Ogun
- Bolu Abant Izzet Baysal University Faculty of Medicine, Department of Neurology, Bolu, Turkey
| | - Abdullah Demirhan
- Bolu Abant Izzet Baysal University Faculty of Medicine, Department of Anesthesiology and Reanimation, Bolu, Turkey
| | - Murat Bilgi
- Bolu Abant Izzet Baysal University Faculty of Medicine, Department of Anesthesiology and Reanimation, Bolu, Turkey
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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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Megalla SA, Abdou KA, Mohamed AI. Bispectral index guided attenuation of hemodynamic and arousal response to endotracheal intubation using magnesium sulfate and fentanyl. Randomized, controlled trial. EGYPTIAN JOURNAL OF ANAESTHESIA 2019. [DOI: 10.1080/11101849.2019.1595346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Affiliation(s)
- Sohair A. Megalla
- Department of Anesthesiology &ICU, Minia Faculty of Medicine, El Minia University, El Minia, Egypt
| | - Khaled A. Abdou
- Department of Anesthesiology &ICU, Minia Faculty of Medicine, El Minia University, El Minia, Egypt
| | - Ahmed I. Mohamed
- Department of Anesthesiology &ICU, Minia Faculty of Medicine, El Minia University, El Minia, Egypt
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Parturient on Magnesium Infusion and Its Effectiveness as an Adjuvant Analgesic after Cesarean Delivery: A Retrospective Analysis. ScientificWorldJournal 2018; 2018:3978760. [PMID: 30581373 PMCID: PMC6276462 DOI: 10.1155/2018/3978760] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 10/29/2018] [Indexed: 11/17/2022] Open
Abstract
Background Perioperative use of intravenous magnesium as part of multimodal analgesia has been increasing in recent years in an effort to decrease the use of opioids. The aim of this study was to evaluate the effectiveness of magnesium sulfate infusion in lowering analgesic requirement and decreasing the intensity of pain score after cesarean delivery. Methods Sixty-four patients who underwent cesarean delivery under spinal anesthesia were included in this medical record review: 32 patients received magnesium infusion after cesarean delivery for treatment of mild preeclampsia (Mg group); 32 patients received routine post-cesarean delivery care (control group). Primary outcome was total analgesic consumption and secondary was visual analogue scores (VAS) of pain in each group during the first 24 hours following delivery. These measures were compared using Student's t-tests and Mann-Whitney U-tests. Results Our study found that patients in the Mg group had significantly less requirement for analgesia than the control group. In the 24 h after cesarean delivery, the Mg group received significantly less intravenous ketorolac (the standard initial rescue analgesic agent) when compared to the control group (79 ± 23 mg vs. 90 ± 0 mg; P = 0.008). The Mg group also received significantly less intravenous morphine equivalents than the control group (median 5.0 (IRQ: 0.0 - 10.0) vs. 9.3 (IRQ: 6.0 - 21.1); P = 0.001) during the first 24 h after cesarean delivery. The Mg group also had significantly lower VAS pain scores than the control group (median 1.75 (IRQ: 0.4 - 2.6) vs. median 3.2 (IRQ: 2.3 - 4.5); P < 0.001). Conclusions Our results suggest that magnesium sulfate infusion decreases total analgesic requirements and lowers VAS pain scores during the first 24 h after cesarean delivery.
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Altıparmak B, Çelebi N, Canbay Ö, Toker MK, Kılıçarslan B, Aypar Ü. Effect of magnesium sulfate on anesthesia depth, awareness incidence, and postoperative pain scores in obstetric patients. A double-blind randomized controlled trial. Saudi Med J 2018; 39:579-585. [PMID: 29915852 PMCID: PMC6058748 DOI: 10.15537/smj.2018.6.22376] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Objectives: To assess the effects of magnesium on the depth of anesthesia and to determine the effects of magnesium on incidence of awareness and postoperative pain after caesarean section. Methods: The study was designed as a double-blind, controlled, randomized study and conducted in Hacettepe University Hospital, Ankara, Turkey between January 2015 and March 2016. A total of 100 pregnant healthy women who were between 17 and 41 years old, ASA II, and scheduled for an elective cesarean section with general anesthesia were included in the study. After induction, sevoflurane was used for maintenance in Group S and desflurane in Group D (control groups). At Group S-M and Group D-M (study groups), magnesium infusion was started with sevoflurane and desflurane anesthesia respectively. Minimum alveolar concentration of sevoflurane and desflurane were kept constant. Bispectral index scores (BIS), fentanyl consumption and postoperative visual analogue scale (VAS) values were recorded. All of the patients had been followed-up for awareness until the postoperative first year. Results: Demographic variables of the patients were similar. BIS values were significantly higher in control groups throughout the operation (p<0.001). No significant difference was detected for intraoperative fentanyl consumption and awareness incidence. VAS values were significantly lower in study groups (p<0.05). Conclusion: Magnesium infusion provided significantly lower intraoperative BIS values and lower postoperative VAS scores. We believe that magnesium can be useful as an adjuvant to general anesthesia.
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Affiliation(s)
- Başak Altıparmak
- Department of Anesthesiology and Reanimation, Training and Research Hospital, Muğla Sıtkı Koçman University, Muğla, Turkey. E-mail.
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Intravenous Magnesium Sulphate for Analgesia after Caesarean Section: A Systematic Review. Anesthesiol Res Pract 2017; 2017:9186374. [PMID: 29333156 PMCID: PMC5733151 DOI: 10.1155/2017/9186374] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 10/12/2017] [Indexed: 11/17/2022] Open
Abstract
Objective To summarise the evidence for use of intravenous magnesium for analgesic effect in caesarean section patients. Background Postcaesarean pain requires effective analgesia. Magnesium, an N-methyl-D-aspartate receptor antagonist and calcium-channel blocker, has previously been investigated for its analgesic properties. Methods A systematic search was conducted of PubMed, Scopus, MEDLINE, Cochrane Library, and Google Scholar databases for randomised-control trials comparing intravenous magnesium to placebo with analgesic outcomes in caesarean patients. Results Ten trials met inclusion criteria. Seven were qualitatively compared after exclusion of three for unclear bias risk. Four trials were conducted with general anaesthesia, while three utilised neuraxial anaesthesia. Five of seven trials resulted in decreased analgesic requirement postoperatively and four of seven resulted in lower serial visual analogue scale scores. Conclusions Adjunct analgesic agents are utilised to improve analgesic outcomes and minimise opioid side effects. Preoperative intravenous magnesium may decrease total postcaesarean rescue analgesia consumption with few side effects; however, small sample size and heterogeneity of methodology in included trials restricts the ability to draw strong conclusions. Therefore, given the apparent safety and efficacy of magnesium, its role as an adjunct analgesic in caesarean section patients should be further investigated with the most current anaesthetic techniques.
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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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Magnesium in obstetric anesthesia and intensive care. J Anesth 2016; 31:127-139. [PMID: 27803982 DOI: 10.1007/s00540-016-2257-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Accepted: 09/24/2016] [Indexed: 12/14/2022]
Abstract
Magnesium, one of the essential elements in the human body, has numerous favorable effects that offer a variety of possibilities for its use in obstetric anesthesia and intensive care. Administered as a single intravenous bolus dose or a bolus followed by continuous infusion during surgery, magnesium attenuates stress response to endotracheal intubation, and reduces intraoperative anesthetic and postoperative analgesic requirements, while at the same time preserving favorable hemodynamics. Applied as part of an intrathecal or epidural anesthetic mixture, magnesium prolongs the duration of anesthesia and diminishes total postoperative analgesic consumption with no adverse maternal or neonatal effects. In obstetric intensive care, magnesium represents a first-choice medication in the treatment and prevention of eclamptic seizures. If used in recommended doses with close monitoring, magnesium is a safe and effective medication.
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Johnson AN, Seddighi R, Rohrbach BW, Cox SK, Egger CM, Martin-Flores M, Doherty TJ. Effects of magnesium sulfate and propofol on the minimum alveolar concentration preventing motor movement in sevoflurane-anesthetized dogs. Am J Vet Res 2016; 77:575-81. [PMID: 27227494 DOI: 10.2460/ajvr.77.6.575] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE To evaluate the effect of MgSO4, alone and in combination with propofol, on the minimum alveolar concentration preventing motor movement (MACNM) in sevoflurane-anesthetized dogs. ANIMALS 6 healthy purpose-bred adult male Beagles (least squares mean ± SEM body weight, 12.0 ± 1.1 kg). PROCEDURES Dogs were anesthetized 3 times at weekly intervals. The MACNM was measured 45 minutes after induction of anesthesia (baseline; MACNM-B) and was determined each time by use of a noxious electrical stimulus. Treatments were administered as a loading dose and constant rate infusion (CRI) as follows: treatment 1, MgSO4 loading dose of 45 mg/kg and CRI of 15 mg/kg/h; treatment 2, propofol loading dose of 4 mg/kg and CRI of 9 mg/kg/h; and treatment 3, MgSO4 and propofol combination (same doses used previously for each drug). A mixed-model ANOVA and Tukey-Kramer tests were used to determine effects of each treatment on the percentage decrease from MACNM-B. Data were reported as least squares mean ± SEM values. RESULTS Decrease from MACNM-B was 3.4 ± 3.1%, 48.3 ± 3.1%, and 50.3 ± 3.1%, for treatments 1, 2, and 3, respectively. The decrease for treatments 2 and 3 was significantly different from that for treatment 1; however, no significant difference existed between results for treatments 2 and 3. CONCLUSIONS AND CLINICAL RELEVANCE MgSO4 did not affect MACNM, nor did it potentiate the effects of propofol on MACNM. Administration of MgSO4 in this study appeared to provide no clinical advantage as an anesthetic adjuvant.
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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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Dexmedetomidine versus Magnesium Sulfate as Adjunct during Anesthesia for Laparoscopic Colectomy. Anesthesiol Res Pract 2016; 2016:7172920. [PMID: 27051421 PMCID: PMC4804053 DOI: 10.1155/2016/7172920] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Revised: 02/11/2016] [Accepted: 02/15/2016] [Indexed: 12/27/2022] Open
Abstract
Objectives. To compare dexmedetomidine versus magnesium during laparoscopic colectomy. Patients and Methods. 51 patients were randomly allocated into 3 groups: group C (control) received saline infusion, group D dexmedetomidine 1 g/kg and then 0.4 g/kg/hr, and group M MgSO4 2 g and then 15 g/kg/min. Intraoperative hemodynamics were measured before and 1 min after intubation (T1 and T2), before and 5 min after peritoneal insufflation (T3 and T4), before and 5 min after 30° Trendelenburg position (T5 and T6), 5 min after resuming flat position (T7), 5 min after peritoneal deflations (T8), after extubation (T9), and at time of admission to PACU (T10). Recovery time and degree of sedation were assessed. Results. HR and MAP were significantly higher in T2, T4, and T6 compared to T1, T3, and T5, respectively, in all groups with lower measurements in groups D and M compared to group C. Mean of collective measurements was significantly higher in group C. Recovery time and sedation score were significantly higher in groups D and M. Time to Aldrete score of ≥9 was significantly longer in groups D and M. Conclusion. Both drugs ameliorate the pressor responses during LC with a nonsignificant difference. This study is registered with PACTR201602001481308.
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Attenuation of cardiovascular stress response to endotracheal intubation by the use of remifentanil in patients undergoing Cesarean delivery. J Anesth 2015; 30:274-83. [DOI: 10.1007/s00540-015-2118-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Accepted: 12/01/2015] [Indexed: 12/19/2022]
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Amer MM, Abdelaal Ahmed Mahmoud A, Abdelrahman Mohammed MK, Elsharawy AM, Ahmed DAE, Farag EM. Effect of magnesium sulphate on bi-spectral index (BIS) values during general anesthesia in children. BMC Anesthesiol 2015; 15:126. [PMID: 26395085 PMCID: PMC4579582 DOI: 10.1186/s12871-015-0108-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Accepted: 09/16/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Magnesium was reported to reduce both the anesthetic requirements and the period needed to reach a bi-spectral index value of 60 when used intra-operatively (Br J Anaesth 83:302-20, 1999; Anesth Analg 20:1273-5, 1988; Br J Anaesth 89:594-8, 2002; Anesth Analg 87:206-10, 1998; Br J Anaesth 89:594-8, 2002; Br J Anaesth 94:438-41, 2005) and to minimize the emergence agitation (Anaesthesia 61:1058-63, 2006). Previous studies examined the influence of magnesium on the anesthetic requirements while the bi-spectral Index values were kept within a constant range. We evaluated the effect of intraoperative magnesium on the bi-spectral index values during pediatric anesthesia while we kept other anesthetic variables unchanged. METHODS Eighty pediatric patients with ASA physical status I, age 2-8 years and scheduled for minor infra-umbilical elective procedures included in a prospective randomized controlled study. We randomly divided patients into two groups. Group I (40 patients); received a bolus dose 50 mg/kg of magnesium sulphate followed by an infusion at rate of 15 mg/kg/h throughout the procedure. Group II (40 patients); received the same amount in the form of ringer acetate for blinding. We compared between the groups regarding: 1) BIS values. 2) Hemodynamic parameters. 3) Arterial oxygen saturation 4) End-tidal CO2 5) Respiratory rate and 6) Tidal volume. RESULTS Magnesium group (Group I) showed significantly lower BIS values and shorter time to achieve BIS values below 60. Respiratory parameters (tidal volume and respiratory rate) were significantly lower in the magnesium group. Otherwise, no significant differences between the study group and the control group were detected. DISCUSSION Our study has the advantage of evaluating the direct effect of magnesium sulphate on the Bi-spectral index scale with keeping other intraoperative factors almost constant (as the type of operations, induction and maintenance techniques, end-tidal anesthetic concentration, analgesia and mode of ventilation) for accurate assessment. CONCLUSION Magnesium produced significantly lower BIS values, less time to reach BIS values below 60, lower tidal volume and lower respiratory rate during pediatric general anesthesia. TRIAL REGISTRATION Pan African Clinical Trial Registry, www.pactr.org , PACTR201312000666231 . Registered at 6 October 2013.
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Affiliation(s)
- Mahmoud Mostafa Amer
- Department of Anesthesia, Faculty of Medicine, Beni Suef University, Beni Suef, Egypt.
| | - Ahmed Abdelaal Ahmed Mahmoud
- Department of Anesthesia, Faculty of Medicine, Beni Suef University, Beni Suef, Egypt. .,Department of Anesthesiology, Beni Suef University, 39 Mousa Ebn Nousir Street, 7th District, Nasr City, P.O. 11471, Cairo, Egypt.
| | | | | | | | - Ehab Mohamed Farag
- Department of Anesthesia, Faculty of Medicine, Beni Suef University, Beni Suef, Egypt.
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A RANDOMIZED CLINICAL STUDY TO EVALUATE THE EFFECT OF INTRAVENOUS MAGNESIUM SULPHATE FOR POSTOPERATIVE PAIN RELIEF IN PATIENTS UNDERGOING LOWER SEGMENT CAESAREAN SECTION. ACTA ACUST UNITED AC 2015. [DOI: 10.14260/jemds/2015/1797] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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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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Do SH. Magnesium: a versatile drug for anesthesiologists. Korean J Anesthesiol 2013; 65:4-8. [PMID: 23904932 PMCID: PMC3726845 DOI: 10.4097/kjae.2013.65.1.4] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Accepted: 04/15/2013] [Indexed: 11/26/2022] Open
Abstract
Magnesium sulfate has been used in preeclampsia patients in order to prevent seizure. It is also used for the treatment of arrhythmia and asthma and as an anesthetic adjunct in patients undergoing surgery for pheochromocytoma. However, its potentiating effects on perioperative analgesia and muscle relaxation have drawn attention recently. These characteristics of magnesium (anesthetic- and analgesic-sparing effect) enable anesthesiologists to reduce the use of anesthetics during surgery and the use of analgesics after surgery. Magnesium sulfate has a high therapeutic index and cost-effectiveness. Considering these diverse characteristics useful for anesthesia, appropriate use of magnesium sulfate would improve surgical outcome and patients' satisfaction.
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Affiliation(s)
- Sang-Hwan Do
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
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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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Mercieri M, De Blasi RA, Palmisani S, Forte S, Cardelli P, Romano R, Pinto G, Arcioni R. Changes in cerebrospinal fluid magnesium levels in patients undergoing spinal anaesthesia for hip arthroplasty: does intravenous infusion of magnesium sulphate make any difference? A prospective, randomized, controlled study. Br J Anaesth 2012; 109:208-15. [PMID: 22661752 DOI: 10.1093/bja/aes146] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Most investigators have attributed the reduced postoperative pain or anaesthetic drug requirements in patients receiving i.v. magnesium sulphate (MgSO(4)) infusion during spinal or general anaesthesia to central N-methyl-d-aspartate (NMDA) receptor magnesium (Mg) activity. In this study, we investigated how cerebrospinal fluid (CSF) Mg concentrations change after spinal anaesthesia, and whether peripherally infusing MgSO(4) influences central Mg levels. METHODS Forty-five patients undergoing continuous spinal anaesthesia for hip arthroplasty were randomly assigned to receive either i.v. MgSO(4) at a dose of 50 mg kg(-1) diluted in 100 ml 0.9% saline solution followed by 15 mg kg(-1) h(-1) for 6 h or saline at the same volume [mean (sd) 64 (10) ml]. The changes in CSF and serum total and ionized Mg concentrations were assessed at six time points before and after spinal anaesthesia. Secondary outcome variables included serum and CSF electrolytes and proteins. RESULTS Thirty-five patients completed the study. We found that spinal anaesthesia reduced total and ionized Mg concentrations in CSF by about 10%. Increasing serum Mg concentration over 80% of the baseline value left CSF Mg levels unchanged. CONCLUSIONS Spinal anaesthesia unexpectedly reduced CSF total and ionized Mg concentrations in patients undergoing hip arthroplasty, although the mechanism is unclear. The dose used for peripheral MgSO(4) infusion in this study had no influence on central Mg concentrations in neurologically healthy patients undergoing spinal anaesthesia. If CSF Mg concentration is a reliable marker of Mg brain bioavailability, peripherally infused MgSO(4) during spinal anaesthesia is unlikely to influence central NMDA receptor activity.
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Affiliation(s)
- M Mercieri
- Pain Unit, Department of Medical-Surgical, Techno-Biomedical Sciences and Translational Medicine, Sapienza University of Rome, Ospedale Sant’Andrea, via di Grottarossa, 1035Rome, Italy.
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Abstract
The current article covers some of the major themes that emerged in 2009 in the fields of obstetric anesthesiology, obstetrics, and perinatology, with a special emphasis on the implications for the obstetric anesthesiologist.
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Affiliation(s)
- J M Mhyre
- Department of Anesthesia, Division of Obstetric Anesthesia, Women's Hospital, University of Michigan Health System, Ann Arbor, MI 48109-5278, USA.
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