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Soni V, Reddy A, Singh N, Chauhan R, Sarna R, Meena SC, Luthra A, Tripathi M. Comparison of the Efficacy of Sterile Silicone Studs Versus Lidocaine for the Attenuation of the Hemodynamic Response to Skull Pin Insertion: A Randomized Controlled Trial. World Neurosurg 2024:S1878-8750(24)00704-6. [PMID: 38679381 DOI: 10.1016/j.wneu.2024.04.131] [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: 04/06/2024] [Accepted: 04/21/2024] [Indexed: 05/01/2024]
Abstract
BACKGROUND Skull pin insertion causes hypertension and tachycardia that adversely affects cerebral hemodynamics. We compared the efficacy of sterile silicone studs (SS) and pin site infiltration with lidocaine in attenuation of the sympathetic response to skull pin insertion. METHODS Adult patients (N = 120) undergoing supratentorial craniotomy under general anesthesia were randomized to receive either medical-grade sterile SS or 2 mL of 2% plain lidocaine infiltration at each pin site. Hemodynamic (heart rate and mean arterial pressure) response to skull pin insertion at baseline and at 0, 1, 2, 3, and 5 minutes after skull pin insertion was compared. Requirement of rescue analgesia (fentanyl), complications such as pin-site bleeding, and surgeon satisfaction score were assessed. RESULTS Heart rate in the lidocaine group was significantly greater at 0, 1, 2, 3, and 5 minutes after pin insertion compared with the SS group (P < 0.05). Mean arterial pressure was also significantly higher in the lidocaine group at 0, 1, 2, and 3 minutes after pin insertion (P = 0.001, P = 0.01, P = 0.034, and P = 0.042) compared with the SS group. The number of patients requiring fentanyl [17/60 (28.3%) vs. 40/60 (66%), P = 0.001] was lower in the SS group. The incidence of pin site bleeding was also lower in the SS group, and surgeon satisfaction score was greater. CONCLUSIONS Sterile SS appear to be more effective than lidocaine infiltration in attenuating the hemodynamic response to skull pin insertion with minimal adverse effects. Further multicenter studies are necessary to conclusively establish the safety and efficacy of sterile SS.
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Affiliation(s)
- Vishal Soni
- Department of Anesthesia and Intensive Care, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Ashwini Reddy
- Department of Anesthesia and Intensive Care, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Nidhi Singh
- Department of Anesthesia and Intensive Care, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Rajeev Chauhan
- Department of Anesthesia and Intensive Care, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
| | - Rashi Sarna
- Department of Anesthesia and Intensive Care, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Shyam Charan Meena
- Department of Anesthesia and Intensive Care, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Ankur Luthra
- Department of Anesthesia and Intensive Care, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Manjul Tripathi
- Department of Neurosurgery, Post Graduate Institute of Medical Education and Research, Chandigarh, India
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Singh G, Arimanikam G, Lionel KR, Smita V, Yadav B, Arulvelan A, Sethuraman M. Comparison of Dexmedetomidine Infusion versus Scalp Block with 0.5% Ropivacaine to Attenuate Hemodynamic Response to Skull Pin Insertion in Craniotomy: A Prospective, Randomized Controlled Trial. JOURNAL OF NEUROANAESTHESIOLOGY AND CRITICAL CARE 2020. [DOI: 10.1055/s-0040-1715710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Abstract
Background The insertion of the skull pin head holder to stabilize the head during neurosurgery causes significant periosteal stimulation, resulting in hemodynamic responses, which may lead to brain edema, intracranial hypertension, and hemorrhage in patients with intracranial space-occupying lesions and intracranial aneurysms. We compared the efficacy of dexmedetomidine infusion and 0.5% ropivacaine scalp block in attenuating the hemodynamic response to the skull pin application.
Methods A total of 65 American Society of Anesthesiologists (ASA) class I and II patients aged between 18 and 65 years with a preoperative Glasgow Coma Scale score of 15 undergoing elective craniotomy were randomized to receive either a bolus of 1mcg/kg of dexmedetomidine followed by an infusion of 1 mcg/kg/hour (group D) or a scalp block with 0.5% ropivacaine (group S) in a single-blinded comparator study. Patients were monitored for the following hemodynamic changes following skull pin insertion: heart rate (HR), mean arterial pressure (MAP), the requirement of additional analgesia/anesthesia, and adverse events.
Results HR and MAP were comparable between the groups at baseline, before induction, and before pin insertion. HR and MAP at 1, 2, and 3 minutes after skull pin insertion were significantly higher in group D as compared with group S (p < 0.05) and were comparable between the groups at 5 minutes. The groups were comparable with respect to the requirement of additional analgesia, anesthesia, and incidence of adverse events.
Conclusion Scalp block with 0.5% ropivacaine is effective and superior to dexmedetomidine in attenuating the hemodynamic response to skull pin insertion in ASA I and II neurosurgical patients undergoing craniotomy. However, the hemodynamic effects achieved with dexmedetomidine were within the permissible limits.
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Affiliation(s)
- Georgene Singh
- Department of Neuroanaesthesiology, Christian Medical College, Vellore, Tamil Nadu, India
| | | | - Karen R. Lionel
- Department of Neuroanaesthesiology, Christian Medical College, Vellore, Tamil Nadu, India
| | - V. Smita
- Department of Neuroanaesthesiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, India
| | - Bijesh Yadav
- Department of Biostatistics, Christian Medical College and Hospital, Vellore, Tamil Nadu, India
| | - Appavoo Arulvelan
- Department of Anaesthesiology, Apollo Hospital, Chennai, Tamil Nadu, India
| | - Manikandan Sethuraman
- Department of Neuroanaesthesiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, India
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Koo CH, Jeon S, Kim J, Ryu JH. The effects of intravenous dexmedetomidine on hemodynamic response in patients undergoing skull-pin head-holder application during neurosurgery – A meta-analysis of randomized controlled trials. Clin Neurol Neurosurg 2020; 195:105939. [DOI: 10.1016/j.clineuro.2020.105939] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 05/12/2020] [Accepted: 05/17/2020] [Indexed: 01/05/2023]
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Theerth KA, Sriganesh K, Chakrabarti D, Reddy KRM, Rao GSU. Analgesia nociception index and hemodynamic changes during skull pin application for supratentorial craniotomies in patients receiving scalp block versus pin-site infiltration: A randomized controlled trial. Saudi J Anaesth 2019; 13:306-311. [PMID: 31572074 PMCID: PMC6753753 DOI: 10.4103/sja.sja_812_18] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Background: Noxious stimulation such as skull pin insertion for craniotomy elicits a significant hemodynamic response. Both regional analgesic techniques (pin-site infiltration [PSI] and scalp block [SB]), and systemic strategies (opioids, alpha-2 agonists, anesthetics, and beta-blockers) have shown to attenuate this response. Analgesia Nociception Index (ANI) provides objective information about the magnitude of nociception and adequacy of analgesia. This study compared ANI and hemodynamic changes in patients receiving local anesthetic SB versus PSI during skull pin application for craniotomy. Materials and Methods: Sixty adult patients scheduled for elective supratentorial tumor surgery were randomly allocated to receive local anesthetic SB or PSI for skull pin insertion after the induction of anesthesia. Data regarding heart rate (HR), blood pressure (BP), and ANI were collected every minute for 5 min after the skull pin insertion beginning from the baseline. Results: A significant difference was observed in ANI values between the SB (higher ANI) and the PSI groups during skull pin insertion, P < 0.001 and P = 0.003 for ANIi and ANIm, respectively. Similarly, a significant difference was seen in HR and BP both within and between the two groups during skull pin insertion (P < 0.001 for both). The magnitude and duration of change were smaller in the SB group compared with the PSI group for the parameters studied. A strong negative linear correlation was noted between ANI and hemodynamic parameters. Conclusions: The changes in HR, BP, and ANI were significantly less with local anesthetic SB compared with PSI during skull pin insertion in patients undergoing supratentorial craniotomy.
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Affiliation(s)
- Kaushic A Theerth
- Department of Neuroanaesthesia and Neurocritical Care, Rajagiri Hospital, Ernakulam, Kerala, India
| | - Kamath Sriganesh
- Department of Neuroanaesthesia and Neurocritical Care, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Dhritiman Chakrabarti
- Department of Neuroanaesthesia and Neurocritical Care, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - K R Madhusudan Reddy
- Department of Neuroanaesthesia and Neurocritical Care, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - G S Umamaheswara Rao
- Department of Neuroanaesthesia and Neurocritical Care, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
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Vacas S, Van de Wiele B. Designing a pain management protocol for craniotomy: A narrative review and consideration of promising practices. Surg Neurol Int 2017; 8:291. [PMID: 29285407 PMCID: PMC5735429 DOI: 10.4103/sni.sni_301_17] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Accepted: 10/02/2017] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Craniotomy is a relatively common surgical procedure with a high incidence of postoperative pain. Development of standardized pain management and enhanced recovery after surgery (ERAS) protocols are necessary and crucial to optimize outcomes and patient satisfaction and reduce health care costs. METHODS This work is based upon a literature search of published manuscripts (between 1996 and 2017) from Pubmed, Cochrane Central Register, and Google Scholar. It seeks to both synthesize and review our current scientific understanding of postcraniotomy pain and its part in neurosurgical ERAS protocols. RESULTS Strategies to ameliorate craniotomy pain demand interventions during all phases of patient care: preoperative, intraoperative, and postoperative interventions. Pain management should begin in the perioperative period with risk assessment, patient education, and premedication. In the intraoperative period, modifications in anesthesia technique, choice of opioids, acetaminophen and nonsteroidal anti-inflammatory drugs (NSAIDs), regional techniques, dexmedetomidine, ketamine, lidocaine, corticosteroids, and interdisciplinary communication are all strategies to consider and possibly deploy. Opioids remain the mainstay for pain relief, but patient-controlled analgesia, NSAIDs, standardization of pain management, bio/behavioral interventions, modification of head dressings as well as patient-centric management are useful opportunities that potentially improve patient care. CONCLUSIONS Future research on mechanisms, predictors, treatments, and pain management pathways will help define the combinations of interventions that optimize pain outcomes.
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Affiliation(s)
- Susana Vacas
- Department of Anesthesiology and Perioperative Medicine, University of California Los Angeles, UCLA, Los Angeles, California, USA
| | - Barbara Van de Wiele
- Department of Anesthesiology and Perioperative Medicine, University of California Los Angeles, UCLA, Los Angeles, California, USA
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Forget P, Cata J. Stable anesthesia with alternative to opioids: Are ketamine and magnesium helpful in stabilizing hemodynamics during surgery? A systematic review and meta-analyses of randomized controlled trials. Best Pract Res Clin Anaesthesiol 2017; 31:523-531. [DOI: 10.1016/j.bpa.2017.07.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Revised: 05/18/2017] [Accepted: 07/03/2017] [Indexed: 11/29/2022]
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Kondavagilu SR, Pujari VS, Chadalawada MVR, Bevinguddaiah Y. Low Dose Dexmedetomidine Attenuates Hemodynamic Response to Skull Pin Holder Application. Anesth Essays Res 2017; 11:57-61. [PMID: 28298757 PMCID: PMC5341659 DOI: 10.4103/0259-1162.200229] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Background: The application of skull pin holder elicits an adverse hemodynamic response that can be deleterious; there are many drugs that have been used to attenuate this response. We have conducted this study to evaluate the efficacy of intravenous (i.v.) dexmedetomidine on attenuation of hemodynamic responses to skull pin head holder application and to compare the effectiveness of two doses of i.v. dexmedetomidine (1 μg/kg and 0.5 μg/kg bolus). Materials and Methods: Ninety American Society of Anesthesiologists physical Status I–III patients undergoing craniotomy were randomized into three groups of thirty each. After intubation, patients in Group A received 1 μg/kg of i.v. dexmedetomidine, Group B received 0.5 μg/kg of i.v. dexmedetomidine, whereas Group C received an equivalent quantity of normal saline. Hemodynamic parameters were monitored regularly after skull pin insertion. Results: There was no significant difference in the monitored hemodynamic parameters among the three groups from baseline until intubation. Heart rate (HR) and mean arterial pressure (MAP) increased significantly at skull pin insertion and subsequent points in Group C, whereas the values decreased in Groups A and B (P < 0.05). Patients in Group A showed a higher and sustained attenuation of MAP. Patients in Group C had a higher incidence of tachycardia and hypertension requiring additional measures to attenuate the response. Conclusions: Dexmedetomidine in either dosage (1 μg/kg or 0.5 μg/kg) was effective in attenuating hemodynamic response to skull pin insertion. Dexmedetomidine in doses of 0.5 μg/kg was as effective in attenuating the HR and MAP response to skull pin insertion as compared to a dose of 1 μg/kg.
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Affiliation(s)
| | | | - Mohan V R Chadalawada
- Department Anaesthesiology, M. S. Ramaiah Medical College, Bangalore, Karnataka, India
| | - Yatish Bevinguddaiah
- Department Anaesthesiology, M. S. Ramaiah Medical College, Bangalore, Karnataka, India
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Min J. The treatment of postcraniotomy pain. Anesth Pain Med (Seoul) 2016. [DOI: 10.17085/apm.2016.11.4.327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- Jinhye Min
- Department of Anesthesiology and Pain Medicine, Myongji Hospital, Seonam University College of Medicine, Goyang, Korea
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Paul A, Krishna HM. Comparison between intravenous dexmedetomidine and local lignocaine infiltration to attenuate the haemodynamic response to skull pin head holder application during craniotomy. Indian J Anaesth 2016; 59:785-8. [PMID: 26903671 PMCID: PMC4743301 DOI: 10.4103/0019-5049.171558] [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] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND AND AIMS Skull pin application is intensely painful and can be accompanied by detrimental haemodynamic changes. We compared intravenous (IV) dexmedetomidine with local infiltration of lignocaine at pin application sites to attenuate haemodynamic changes associated with pin application. METHODS Fifty-two patients undergoing craniotomy were randomised to either group dexmedetomidine (received 1 μg/kg dexmedetomidine over 10 min starting at induction of anaesthesia) or group lignocaine (received 3 ml of 2% lignocaine infiltration at pin application sites before pin application). Anaesthetic protocol was standardised. Heart rate (HR) and mean arterial pressure (MAP) were recorded at the following time intervals, pre-induction baseline, pre-infiltration, post-infiltration, pre-pin application and post-pin application at 1, 2, 3, 4, 5, 10 and 15 min. Statistical analysis was done using independent samples t-test, Fisher exact test and Chi-square test. RESULTS HR and MAP were comparable between the groups at all the study intervals. The incidence of adverse haemodynamic effects attributable to pin application (tachycardia and/or hypertension) was comparable between the groups (2 patients in group dexmedetomidine and 5 in group lignocaine). However, the incidence of hypotension and/or bradycardia was significantly greater in the dexmedetomidine group (19 patients in group dexmedetomidine and 5 patients in group lignocaine; P = 0.0007). CONCLUSION IV dexmedetomidine 1 mcg/kg over 10 min is comparable to local infiltration of 2% lignocaine at pin application sites to attenuate the haemodynamic response associated with skull pin application. However, use of dexmedetomidine is associated with significantly higher incidence of hypotension and bradycardia.
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Affiliation(s)
- Anu Paul
- Department of Anaesthesiology, Kasturba Medical College, Manipal University, Manipal, Karnataka, India
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Dash SK, Gosavi KS, Parikh HG, Kondwilkar B. Effect of Clonidine, by infiltration and by intravenous route, on scalp block for supratentorial craniotomy. SOUTHERN AFRICAN JOURNAL OF ANAESTHESIA AND ANALGESIA 2014. [DOI: 10.1080/22201173.2010.10872712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Arshad A, Shamim MS, Waqas M, Enam H, Enam SA. How effective is the local anesthetic infiltration of pin sites prior to application of head clamps: A prospective observational cohort study of hemodynamic response in patients undergoing elective craniotomy. Surg Neurol Int 2013; 4:93. [PMID: 23956936 PMCID: PMC3740611 DOI: 10.4103/2152-7806.115237] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Accepted: 06/04/2013] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Use of Mayfield clamps is associated with potentially hazardous hemodynamic effects. Use of local anesthetic infiltration has yielded varying results in blunting of this response. The authors' objective was to study the effect of lidocaine with adrenaline infiltration at Mayfield pin sites on hemodynamic response in comparison with no intervention. METHODS This was a prospective cohort study conducted at a tertiary care center from January 2012 to July 2012. Patents undergoing elective craniotomies over the study period were included and divided in two groups, Group A received lidocaine infiltration of the pin sites prior to insertion, while Group B did not. Hemodynamic response to pin application was then studied at various intervals. RESULTS A total of 30 patients were enrolled in each group. The baseline mean arterial pressure (MAP) and heart rate prior to pin placement in Groups A and B were comparable (P = 0.985 and 0.313). The MAP at 60 seconds after application of skull pins was significantly different in the two groups; 86.13 (±9.73) mmHg versus 104.03 (±12.95) mmHg (P < 0.001). However, the MAP at 30 minutes after application of skull pins in both groups was comparable (P = 0.585). The mean heart rate measured at 60 seconds after skull pin insertion in Group A was 78.23 (±7.19)/min while in Group B, it was 103.07 (±6.98)/min, the difference being statistically significant (P < 0.001). CONCLUSION Hemodynamic changes due to the application of Mayfield clamps during elective craniotomies can be effectively prevented by prior lidocaine with adrenaline infiltration of the pin insertion sites.
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Affiliation(s)
- Ayesha Arshad
- Department of Surgery, Section of Neurosurgery, Aga Khan University Hospital, Karachi, Pakistan
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Mizrak A, Erkutlu I, Alptekin M, Sen E, Geyik M, Gok A, Oner U. Efficacy of fentanyl and/or lidocaine on total antioxidants and total oxidants during craniotomy. Clin Med Res 2011; 9:82-7. [PMID: 21263058 PMCID: PMC3134437 DOI: 10.3121/cmr.2010.884] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
OBJECTIVE The aim of this study was to investigate the oxidative, hemodynamic, and analgesic effects of local lidocaine infiltration, or intravenous (IV) fentanyl injection, or a combination of lidocaine and IV fentanyl during head fixation in a 3-pin headrest in patients undergoing elective craniotomy. DESIGN Double-blind, randomized, placebo-controlled study. SETTING Gaziantep University Medical Faculty, Department of Anesthesiology and Reanimation. METHODS Eighty patients were randomly assigned to one of four groups. Five minutes before pin fixation, patients in group L received 1 mg/kg of lidocaine 2% for scalp infiltration (n=20), group F received 1 μg/kg of IV fentanyl (n=20), group FL received 1 mg/kg of lidocaine 2% and 1 μg/kg of fentanyl (n=20), and group P received a placebo (n=20). Following standard anesthesia, basal, pre- and post-fixational hemodynamic data were recorded. Blood samples were taken for evaluation of oxidant and antioxidant levels before and after pin fixation. RESULTS The total antioxidant levels after pin fixation were highest in group FL followed by group F, then group L and finally group P (ie, FL>F>L>P) (P<0.05). The mean arterial blood pressure (MAP) after pin fixation was higher than the MAP before pin fixation in groups L and P (P<0.05), but was lower in groups F and FL (P<0.05). CONCLUSION The combination of fentanyl and lidocaine before pin fixation is useful in preventing severe hemodynamic response to pain stimuli, such as pin fixation, and in increasing total antioxidant levels in the post-fixational period during craniotomy in adults.
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Affiliation(s)
- Ayse Mizrak
- Department of Anesthesiology and Reanimation, Sahinbey, Gaziantep, Turkey.
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Nemergut EC, Durieux ME, Missaghi NB, Himmelseher S. Pain management after craniotomy. Best Pract Res Clin Anaesthesiol 2007; 21:557-73. [DOI: 10.1016/j.bpa.2007.06.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Lee EJ, Lee MY, Shyr MH, Cheng JT, Toung TJK, Mirski MA, Chen TY. Adjuvant bupivacaine scalp block facilitates stabilization of hemodynamics in patients undergoing craniotomy with general anesthesia: a preliminary report. J Clin Anesth 2006; 18:490-4. [PMID: 17126775 DOI: 10.1016/j.jclinane.2006.02.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2005] [Revised: 02/27/2006] [Accepted: 02/27/2006] [Indexed: 10/23/2022]
Abstract
STUDY OBJECTIVE To evaluate the effect of 0.25% bupivacaine scalp block on alterations in hemodynamics and plasma catecholamine metabolites during general anesthesia in patients undergoing frontotemporal craniotomy. DESIGN Prospective, clinical study. SETTING Operating room of a university hospital. PATIENTS 16 ASA physical status II and III patients who were scheduled for frontotemporal craniotomy. INTERVENTIONS Patients were prospectively randomized to receive a saline control (C group) or bupivacaine scalp block (SB group) as an adjuvant to general anesthesia using isoflurane in 50% N(2)O-O(2). MEASUREMENTS Routine monitoring of electrocardiogram, heart rate (HR), and mean arterial blood pressure (MAP) were recorded at two-minute intervals from the beginning of anesthesia until 10 minutes after incision, followed by 5-minute intervals throughout the remaining course of the surgery. By prospective design, increases in MAP or HR by 20% above the mean baseline values were treated with 2.5 mg/kg of thiopental combined with 2 mug/kg of fentanyl. Arterial blood was sampled at 5 minutes before and after skin incision and at the start of dural opening for measuring serum catecholamine metabolites by high-performance liquid chromatography. MAIN RESULTS Only two patients in the SB group needed additional anesthetics for stabilizing their hemodynamics during the course of anesthesia. In contrast, all C group patients required supplemental anesthesia for controlling the abrupt rise in hemodynamic parameters. In addition, absolute MAP and HR values were significantly higher in the C group than in the SB group during the surgical period between incision and dural opening. The differences in hemodynamics observed between the two groups were, however, not accompanied with a significant change in plasma catecholamine metabolites at each predetermined time interval measured. CONCLUSIONS Pretreatment with 0.25% bupivacaine scalp block appeared to be an effective adjuvant treatment for maintaining stable hemodynamics for patients undergoing craniotomy during general anesthesia especially at the time of skin incision and dural opening. This study design was unable to discern any correlation between elevation in hemodynamic parameters and a rise in serum catecholamine levels.
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Affiliation(s)
- E-Jian Lee
- Neurophysiology Laboratory, Neurosurgical Service, Department of Surgery and Institute of Biomedical Engineering, National Cheng Kung University Medical Center and Medical School, Tainan City, ROC Taiwan
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